From 1870c688063bc20ae29a9b2744471705d790fe47 Mon Sep 17 00:00:00 2001 From: Corinna Vinschen Date: Fri, 23 May 2008 11:00:35 +0000 Subject: [PATCH] * path.cc (symlink_info::check): Define eabuf and easize outside of loop. Set to NULL on first STATUS_EAS_NOT_SUPPORTED. Align comments. Fix formatting. --- winsup/cygwin/ChangeLog | 6 + winsup/cygwin/path.cc | 6911 +++++++++++++++++++-------------------- 2 files changed, 3461 insertions(+), 3456 deletions(-) diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog index aa967f6db..36727de69 100644 --- a/winsup/cygwin/ChangeLog +++ b/winsup/cygwin/ChangeLog @@ -1,3 +1,9 @@ +2008-05-22 Corinna Vinschen + + * path.cc (symlink_info::check): Define eabuf and easize outside of + loop. Set to NULL on first STATUS_EAS_NOT_SUPPORTED. Align comments. + Fix formatting. + 2008-05-22 Corinna Vinschen * fhandler_disk_file.cc (fhandler_disk_file::readdir): Eliminate diff --git a/winsup/cygwin/path.cc b/winsup/cygwin/path.cc index bbb2b2f66..102326d1e 100644 --- a/winsup/cygwin/path.cc +++ b/winsup/cygwin/path.cc @@ -72,3602 +72,3601 @@ #include #include - bool dos_file_warning = true; +bool dos_file_warning = true; - struct symlink_info +struct symlink_info +{ + char contents[SYMLINK_MAX + 1]; + char *ext_here; + int extn; + unsigned pflags; + DWORD fileattr; + int issymlink; + bool ext_tacked_on; + int error; + bool case_clash; + bool isdevice; + _major_t major; + _minor_t minor; + _mode_t mode; + int check (char *path, const suffix_info *suffixes, unsigned opt, + fs_info &fs); + int set (char *path); + bool parse_device (const char *); + bool case_check (char *path); + int check_sysfile (HANDLE h); + int check_shortcut (HANDLE h); + int check_reparse_point (HANDLE h); + int check_nfs_symlink (HANDLE h); + int posixify (char *srcbuf); + bool set_error (int); +}; + +muto NO_COPY cwdstuff::cwd_lock; + +int pcheck_case = PCHECK_RELAXED; /* Determines the case check behaviour. */ + +static const GUID GUID_shortcut + = { 0x00021401L, 0, 0, 0xc0, 0, 0, 0, 0, 0, 0, 0x46 }; + +enum { + WSH_FLAG_IDLIST = 0x01, /* Contains an ITEMIDLIST. */ + WSH_FLAG_FILE = 0x02, /* Contains a file locator element. */ + WSH_FLAG_DESC = 0x04, /* Contains a description. */ + WSH_FLAG_RELPATH = 0x08, /* Contains a relative path. */ + WSH_FLAG_WD = 0x10, /* Contains a working dir. */ + WSH_FLAG_CMDLINE = 0x20, /* Contains command line args. */ + WSH_FLAG_ICON = 0x40 /* Contains a custom icon. */ +}; + +struct win_shortcut_hdr { - char contents[SYMLINK_MAX + 1]; - char *ext_here; - int extn; - unsigned pflags; - DWORD fileattr; - int issymlink; - bool ext_tacked_on; - int error; - bool case_clash; - bool isdevice; - _major_t major; - _minor_t minor; - _mode_t mode; - int check (char *path, const suffix_info *suffixes, unsigned opt, - fs_info &fs); - int set (char *path); - bool parse_device (const char *); - bool case_check (char *path); - int check_sysfile (HANDLE h); - int check_shortcut (HANDLE h); - int check_reparse_point (HANDLE h); - int check_nfs_symlink (HANDLE h); - int posixify (char *srcbuf); - bool set_error (int); + DWORD size; /* Header size in bytes. Must contain 0x4c. */ + GUID magic; /* GUID of shortcut files. */ + DWORD flags; /* Content flags. See above. */ + + /* The next fields from attr to icon_no are always set to 0 in Cygwin + and U/Win shortcuts. */ + DWORD attr; /* Target file attributes. */ + FILETIME ctime; /* These filetime items are never touched by the */ + FILETIME mtime; /* system, apparently. Values don't matter. */ + FILETIME atime; + DWORD filesize; /* Target filesize. */ + DWORD icon_no; /* Icon number. */ + + DWORD run; /* Values defined in winuser.h. Use SW_NORMAL. */ + DWORD hotkey; /* Hotkey value. Set to 0. */ + DWORD dummy[2]; /* Future extension probably. Always 0. */ }; - muto NO_COPY cwdstuff::cwd_lock; +/* Return non-zero if PATH1 is a prefix of PATH2. + Both are assumed to be of the same path style and / vs \ usage. + Neither may be "". + LEN1 = strlen (PATH1). It's passed because often it's already known. - int pcheck_case = PCHECK_RELAXED; /* Determines the case check behaviour. */ + Examples: + /foo/ is a prefix of /foo <-- may seem odd, but desired + /foo is a prefix of /foo/ + / is a prefix of /foo/bar + / is not a prefix of foo/bar + foo/ is a prefix foo/bar + /foo is not a prefix of /foobar +*/ - static const GUID GUID_shortcut - = { 0x00021401L, 0, 0, 0xc0, 0, 0, 0, 0, 0, 0, 0x46 }; +int +path_prefix_p (const char *path1, const char *path2, int len1) +{ + /* Handle case where PATH1 has trailing '/' and when it doesn't. */ + if (len1 > 0 && isdirsep (path1[len1 - 1])) + len1--; - enum { - WSH_FLAG_IDLIST = 0x01, /* Contains an ITEMIDLIST. */ - WSH_FLAG_FILE = 0x02, /* Contains a file locator element. */ - WSH_FLAG_DESC = 0x04, /* Contains a description. */ - WSH_FLAG_RELPATH = 0x08, /* Contains a relative path. */ - WSH_FLAG_WD = 0x10, /* Contains a working dir. */ - WSH_FLAG_CMDLINE = 0x20, /* Contains command line args. */ - WSH_FLAG_ICON = 0x40 /* Contains a custom icon. */ - }; + if (len1 == 0) + return isdirsep (path2[0]) && !isdirsep (path2[1]); - struct win_shortcut_hdr + if (isdirsep (path2[len1]) || path2[len1] == 0 || path1[len1 - 1] == ':') + return pathnmatch (path1, path2, len1); + + return 0; +} + +/* Return non-zero if paths match in first len chars. + Check is dependent of the case sensitivity setting. */ +int +pathnmatch (const char *path1, const char *path2, int len) +{ + return pcheck_case == PCHECK_STRICT ? !strncmp (path1, path2, len) + : strncasematch (path1, path2, len); +} + +/* Return non-zero if paths match. Check is dependent of the case + sensitivity setting. */ +int +pathmatch (const char *path1, const char *path2) +{ + return pcheck_case == PCHECK_STRICT ? !strcmp (path1, path2) + : strcasematch (path1, path2); +} + +/* TODO: This function is used in mkdir and rmdir to generate correct + error messages in case of paths ending in /. or /.. components. + Right now, normalize_posix_path will just normalize + those components away, which changes the semantics. */ +bool +has_dot_last_component (const char *dir, bool test_dot_dot) +{ + /* SUSv3: . and .. are not allowed as last components in various system + calls. Don't test for backslash path separator since that's a Win32 + path following Win32 rules. */ + const char *last_comp = strrchr (dir, '/'); + if (!last_comp) + last_comp = dir; + else { + /* Check for trailing slash. If so, hop back to the previous slash. */ + if (!last_comp[1]) + while (last_comp > dir) + if (*--last_comp == '/') + break; + if (*last_comp == '/') + ++last_comp; + } + return last_comp[0] == '.' + && ((last_comp[1] == '\0' || last_comp[1] == '/') + || (test_dot_dot + && last_comp[1] == '.' + && (last_comp[2] == '\0' || last_comp[2] == '/'))); +} + +/* Normalize a POSIX path. + All duplicate /'s, except for 2 leading /'s, are deleted. + The result is 0 for success, or an errno error value. */ + +int +normalize_posix_path (const char *src, char *dst, char *&tail) +{ + const char *in_src = src; + char *dst_start = dst; + syscall_printf ("src %s", src); + + if ((isdrive (src) && isdirsep (src[2])) || *src == '\\') + goto win32_path; + + tail = dst; + if (!isslash (src[0])) { - DWORD size; /* Header size in bytes. Must contain 0x4c. */ - GUID magic; /* GUID of shortcut files. */ - DWORD flags; /* Content flags. See above. */ - - /* The next fields from attr to icon_no are always set to 0 in Cygwin - and U/Win shortcuts. */ - DWORD attr; /* Target file attributes. */ - FILETIME ctime; /* These filetime items are never touched by the */ - FILETIME mtime; /* system, apparently. Values don't matter. */ - FILETIME atime; - DWORD filesize; /* Target filesize. */ - DWORD icon_no; /* Icon number. */ - - DWORD run; /* Values defined in winuser.h. Use SW_NORMAL. */ - DWORD hotkey; /* Hotkey value. Set to 0. */ - DWORD dummy[2]; /* Future extension probably. Always 0. */ - }; - - /* Return non-zero if PATH1 is a prefix of PATH2. - Both are assumed to be of the same path style and / vs \ usage. - Neither may be "". - LEN1 = strlen (PATH1). It's passed because often it's already known. - - Examples: - /foo/ is a prefix of /foo <-- may seem odd, but desired - /foo is a prefix of /foo/ - / is a prefix of /foo/bar - / is not a prefix of foo/bar - foo/ is a prefix foo/bar - /foo is not a prefix of /foobar - */ - - int - path_prefix_p (const char *path1, const char *path2, int len1) - { - /* Handle case where PATH1 has trailing '/' and when it doesn't. */ - if (len1 > 0 && isdirsep (path1[len1 - 1])) - len1--; - - if (len1 == 0) - return isdirsep (path2[0]) && !isdirsep (path2[1]); - - if (isdirsep (path2[len1]) || path2[len1] == 0 || path1[len1 - 1] == ':') - return pathnmatch (path1, path2, len1); - - return 0; - } - - /* Return non-zero if paths match in first len chars. - Check is dependent of the case sensitivity setting. */ - int - pathnmatch (const char *path1, const char *path2, int len) - { - return pcheck_case == PCHECK_STRICT ? !strncmp (path1, path2, len) - : strncasematch (path1, path2, len); - } - - /* Return non-zero if paths match. Check is dependent of the case - sensitivity setting. */ - int - pathmatch (const char *path1, const char *path2) - { - return pcheck_case == PCHECK_STRICT ? !strcmp (path1, path2) - : strcasematch (path1, path2); - } - - /* TODO: This function is used in mkdir and rmdir to generate correct - error messages in case of paths ending in /. or /.. components. - Right now, normalize_posix_path will just normalize - those components away, which changes the semantics. */ - bool - has_dot_last_component (const char *dir, bool test_dot_dot) - { - /* SUSv3: . and .. are not allowed as last components in various system - calls. Don't test for backslash path separator since that's a Win32 - path following Win32 rules. */ - const char *last_comp = strrchr (dir, '/'); - if (!last_comp) - last_comp = dir; - else { - /* Check for trailing slash. If so, hop back to the previous slash. */ - if (!last_comp[1]) - while (last_comp > dir) - if (*--last_comp == '/') - break; - if (*last_comp == '/') - ++last_comp; - } - return last_comp[0] == '.' - && ((last_comp[1] == '\0' || last_comp[1] == '/') - || (test_dot_dot - && last_comp[1] == '.' - && (last_comp[2] == '\0' || last_comp[2] == '/'))); - } - - /* Normalize a POSIX path. - All duplicate /'s, except for 2 leading /'s, are deleted. - The result is 0 for success, or an errno error value. */ - - int - normalize_posix_path (const char *src, char *dst, char *&tail) - { - const char *in_src = src; - char *dst_start = dst; - syscall_printf ("src %s", src); - - if ((isdrive (src) && isdirsep (src[2])) || *src == '\\') - goto win32_path; - - tail = dst; - if (!isslash (src[0])) - { - if (!cygheap->cwd.get (dst)) - return get_errno (); - tail = strchr (tail, '\0'); - if (isslash (dst[0]) && isslash (dst[1])) - ++dst_start; - if (*src == '.') - { - if (tail == dst_start + 1 && *dst_start == '/') - tail--; - goto sawdot; - } - if (tail > dst && !isslash (tail[-1])) - *tail++ = '/'; - } - /* Two leading /'s? If so, preserve them. */ - else if (isslash (src[1]) && !isslash (src[2])) - { - *tail++ = *src++; + if (!cygheap->cwd.get (dst)) + return get_errno (); + tail = strchr (tail, '\0'); + if (isslash (dst[0]) && isslash (dst[1])) ++dst_start; - } + if (*src == '.') + { + if (tail == dst_start + 1 && *dst_start == '/') + tail--; + goto sawdot; + } + if (tail > dst && !isslash (tail[-1])) + *tail++ = '/'; + } + /* Two leading /'s? If so, preserve them. */ + else if (isslash (src[1]) && !isslash (src[2])) + { + *tail++ = *src++; + ++dst_start; + } - while (*src) - { - if (*src == '\\') - goto win32_path; - /* Strip runs of /'s. */ - if (!isslash (*src)) - *tail++ = *src++; - else - { - while (*++src) - { - if (isslash (*src)) - continue; - - if (*src != '.') - break; - - sawdot: - if (src[1] != '.') - { - if (!src[1]) - { - *tail++ = '/'; - goto done; - } - if (!isslash (src[1])) - break; - } - else if (src[2] && !isslash (src[2])) - break; - else - { - while (tail > dst_start && !isslash (*--tail)) - continue; - src++; - } - } - - *tail++ = '/'; - } - if ((tail - dst) >= NT_MAX_PATH) + while (*src) + { + if (*src == '\\') + goto win32_path; + /* Strip runs of /'s. */ + if (!isslash (*src)) + *tail++ = *src++; + else + { + while (*++src) { - debug_printf ("ENAMETOOLONG = normalize_posix_path (%s)", src); - return ENAMETOOLONG; + if (isslash (*src)) + continue; + + if (*src != '.') + break; + + sawdot: + if (src[1] != '.') + { + if (!src[1]) + { + *tail++ = '/'; + goto done; + } + if (!isslash (src[1])) + break; + } + else if (src[2] && !isslash (src[2])) + break; + else + { + while (tail > dst_start && !isslash (*--tail)) + continue; + src++; + } } - } - done: - *tail = '\0'; + *tail++ = '/'; + } + if ((tail - dst) >= NT_MAX_PATH) + { + debug_printf ("ENAMETOOLONG = normalize_posix_path (%s)", src); + return ENAMETOOLONG; + } + } - debug_printf ("%s = normalize_posix_path (%s)", dst, in_src); - return 0; +done: + *tail = '\0'; - win32_path: - int err = normalize_win32_path (in_src, dst, tail); - if (!err) - for (char *p = dst; (p = strchr (p, '\\')); p++) - *p = '/'; - return err ?: -1; - } + debug_printf ("%s = normalize_posix_path (%s)", dst, in_src); + return 0; - inline void - path_conv::add_ext_from_sym (symlink_info &sym) - { - if (sym.ext_here && *sym.ext_here) - { - known_suffix = path + sym.extn; - if (sym.ext_tacked_on) - strcpy (known_suffix, sym.ext_here); - } - } +win32_path: + int err = normalize_win32_path (in_src, dst, tail); + if (!err) + for (char *p = dst; (p = strchr (p, '\\')); p++) + *p = '/'; + return err ?: -1; +} - static void __stdcall mkrelpath (char *dst) __attribute__ ((regparm (2))); - static void __stdcall - mkrelpath (char *path) - { - tmp_pathbuf tp; - char *cwd_win32 = tp.c_get (); - if (!cygheap->cwd.get (cwd_win32, 0)) - return; +inline void +path_conv::add_ext_from_sym (symlink_info &sym) +{ + if (sym.ext_here && *sym.ext_here) + { + known_suffix = path + sym.extn; + if (sym.ext_tacked_on) + strcpy (known_suffix, sym.ext_here); + } +} - unsigned cwdlen = strlen (cwd_win32); - if (!path_prefix_p (cwd_win32, path, cwdlen)) - return; +static void __stdcall mkrelpath (char *dst) __attribute__ ((regparm (2))); +static void __stdcall +mkrelpath (char *path) +{ + tmp_pathbuf tp; + char *cwd_win32 = tp.c_get (); + if (!cygheap->cwd.get (cwd_win32, 0)) + return; - size_t n = strlen (path); - if (n < cwdlen) - return; + unsigned cwdlen = strlen (cwd_win32); + if (!path_prefix_p (cwd_win32, path, cwdlen)) + return; - char *tail = path; - if (n == cwdlen) - tail += cwdlen; - else - tail += isdirsep (cwd_win32[cwdlen - 1]) ? cwdlen : cwdlen + 1; + size_t n = strlen (path); + if (n < cwdlen) + return; - memmove (path, tail, strlen (tail) + 1); - if (!*path) - strcpy (path, "."); - } + char *tail = path; + if (n == cwdlen) + tail += cwdlen; + else + tail += isdirsep (cwd_win32[cwdlen - 1]) ? cwdlen : cwdlen + 1; - /* Beginning with Samba 3.0.28a, Samba allows to get version information using - the ExtendedInfo member returned by a FileFsObjectIdInformation request. - We just store the samba_version information for now. Older versions than - 3.2 are still guessed at by testing the file system flags. */ + memmove (path, tail, strlen (tail) + 1); + if (!*path) + strcpy (path, "."); +} + +/* Beginning with Samba 3.0.28a, Samba allows to get version information using + the ExtendedInfo member returned by a FileFsObjectIdInformation request. + We just store the samba_version information for now. Older versions than + 3.2 are still guessed at by testing the file system flags. */ #define SAMBA_EXTENDED_INFO_MAGIC 0x536d4261 /* "SmBa" */ #define SAMBA_EXTENDED_INFO_VERSION_STRING_LENGTH 28 #pragma pack(push,4) - struct smb_extended_info { - DWORD samba_magic; /* Always SAMBA_EXTENDED_INFO_MAGIC */ - DWORD samba_version; /* Major/Minor/Release/Revision */ - DWORD samba_subversion; /* Prerelease/RC/Vendor patch */ - LARGE_INTEGER samba_gitcommitdate; - char samba_version_string[SAMBA_EXTENDED_INFO_VERSION_STRING_LENGTH]; - }; +struct smb_extended_info { + DWORD samba_magic; /* Always SAMBA_EXTENDED_INFO_MAGIC */ + DWORD samba_version; /* Major/Minor/Release/Revision */ + DWORD samba_subversion; /* Prerelease/RC/Vendor patch */ + LARGE_INTEGER samba_gitcommitdate; + char samba_version_string[SAMBA_EXTENDED_INFO_VERSION_STRING_LENGTH]; +}; #pragma pack(pop) - bool - fs_info::update (PUNICODE_STRING upath, HANDLE in_vol) - { - NTSTATUS status = STATUS_OBJECT_NAME_NOT_FOUND; - HANDLE vol; - OBJECT_ATTRIBUTES attr; - IO_STATUS_BLOCK io; - bool no_media = false; - FILE_FS_DEVICE_INFORMATION ffdi; - FILE_FS_OBJECTID_INFORMATION ffoi; - struct { - FILE_FS_ATTRIBUTE_INFORMATION ffai; - WCHAR buf[NAME_MAX + 1]; - } ffai_buf; - struct { - FILE_FS_VOLUME_INFORMATION ffvi; - WCHAR buf[NAME_MAX + 1]; - } ffvi_buf; - UNICODE_STRING fsname, testname; +bool +fs_info::update (PUNICODE_STRING upath, HANDLE in_vol) +{ + NTSTATUS status = STATUS_OBJECT_NAME_NOT_FOUND; + HANDLE vol; + OBJECT_ATTRIBUTES attr; + IO_STATUS_BLOCK io; + bool no_media = false; + FILE_FS_DEVICE_INFORMATION ffdi; + FILE_FS_OBJECTID_INFORMATION ffoi; + struct { + FILE_FS_ATTRIBUTE_INFORMATION ffai; + WCHAR buf[NAME_MAX + 1]; + } ffai_buf; + struct { + FILE_FS_VOLUME_INFORMATION ffvi; + WCHAR buf[NAME_MAX + 1]; + } ffvi_buf; + UNICODE_STRING fsname, testname; - if (in_vol) - vol = in_vol; - else - { - InitializeObjectAttributes (&attr, upath, OBJ_CASE_INSENSITIVE, NULL, - NULL); - status = NtOpenFile (&vol, READ_CONTROL, &attr, &io, - FILE_SHARE_VALID_FLAGS, FILE_OPEN_FOR_BACKUP_INTENT); - while (!NT_SUCCESS (status) - && (attr.ObjectName->Length > 7 * sizeof (WCHAR) - || status == STATUS_NO_MEDIA_IN_DEVICE)) - { - UNICODE_STRING dir; - RtlSplitUnicodePath (attr.ObjectName, &dir, NULL); - attr.ObjectName = &dir; - if (status == STATUS_NO_MEDIA_IN_DEVICE) - { - no_media = true; - dir.Length = 6 * sizeof (WCHAR); - } - else if (dir.Length > 7 * sizeof (WCHAR)) - dir.Length -= sizeof (WCHAR); - status = NtOpenFile (&vol, READ_CONTROL, &attr, &io, - FILE_SHARE_VALID_FLAGS, - FILE_OPEN_FOR_BACKUP_INTENT); - } - if (!NT_SUCCESS (status)) - { - debug_printf ("Cannot access path %S, status %08lx", - attr.ObjectName, status); - clear (); - NtClose (vol); - return false; - } - } - - status = NtQueryVolumeInformationFile (vol, &io, &ffvi_buf.ffvi, - sizeof ffvi_buf, - FileFsVolumeInformation); - sernum = NT_SUCCESS (status) ? ffvi_buf.ffvi.VolumeSerialNumber : 0; - status = NtQueryVolumeInformationFile (vol, &io, &ffdi, sizeof ffdi, - FileFsDeviceInformation); - if (!NT_SUCCESS (status)) - ffdi.DeviceType = ffdi.Characteristics = 0; - - if (ffdi.Characteristics & FILE_REMOTE_DEVICE - || (!ffdi.DeviceType - && RtlEqualUnicodePathPrefix (attr.ObjectName, L"\\??\\UNC\\", TRUE))) - is_remote_drive (true); - else - is_remote_drive (false); - - if (!no_media) - status = NtQueryVolumeInformationFile (vol, &io, &ffai_buf.ffai, - sizeof ffai_buf, - FileFsAttributeInformation); - if (no_media || !NT_SUCCESS (status)) - { - debug_printf ("Cannot get volume attributes (%S), %08lx", - attr.ObjectName, status); - has_buggy_open (false); - flags (0); - if (!in_vol) + if (in_vol) + vol = in_vol; + else + { + InitializeObjectAttributes (&attr, upath, OBJ_CASE_INSENSITIVE, NULL, + NULL); + status = NtOpenFile (&vol, READ_CONTROL, &attr, &io, + FILE_SHARE_VALID_FLAGS, FILE_OPEN_FOR_BACKUP_INTENT); + while (!NT_SUCCESS (status) + && (attr.ObjectName->Length > 7 * sizeof (WCHAR) + || status == STATUS_NO_MEDIA_IN_DEVICE)) + { + UNICODE_STRING dir; + RtlSplitUnicodePath (attr.ObjectName, &dir, NULL); + attr.ObjectName = &dir; + if (status == STATUS_NO_MEDIA_IN_DEVICE) + { + no_media = true; + dir.Length = 6 * sizeof (WCHAR); + } + else if (dir.Length > 7 * sizeof (WCHAR)) + dir.Length -= sizeof (WCHAR); + status = NtOpenFile (&vol, READ_CONTROL, &attr, &io, + FILE_SHARE_VALID_FLAGS, + FILE_OPEN_FOR_BACKUP_INTENT); + } + if (!NT_SUCCESS (status)) + { + debug_printf ("Cannot access path %S, status %08lx", + attr.ObjectName, status); + clear (); NtClose (vol); - return false; - } - flags (ffai_buf.ffai.FileSystemAttributes); - name_len (ffai_buf.ffai.MaximumComponentNameLength); - /* Should be reevaluated for each new OS. Right now this mask is valid up - to Vista. The important point here is to test only flags indicating - capabilities and to ignore flags indicating a specific state of this - volume. At present these flags to ignore are FILE_VOLUME_IS_COMPRESSED - and FILE_READ_ONLY_VOLUME. */ + return false; + } + } + + status = NtQueryVolumeInformationFile (vol, &io, &ffvi_buf.ffvi, + sizeof ffvi_buf, + FileFsVolumeInformation); + sernum = NT_SUCCESS (status) ? ffvi_buf.ffvi.VolumeSerialNumber : 0; + status = NtQueryVolumeInformationFile (vol, &io, &ffdi, sizeof ffdi, + FileFsDeviceInformation); + if (!NT_SUCCESS (status)) + ffdi.DeviceType = ffdi.Characteristics = 0; + + if (ffdi.Characteristics & FILE_REMOTE_DEVICE + || (!ffdi.DeviceType + && RtlEqualUnicodePathPrefix (attr.ObjectName, L"\\??\\UNC\\", TRUE))) + is_remote_drive (true); + else + is_remote_drive (false); + + if (!no_media) + status = NtQueryVolumeInformationFile (vol, &io, &ffai_buf.ffai, + sizeof ffai_buf, + FileFsAttributeInformation); + if (no_media || !NT_SUCCESS (status)) + { + debug_printf ("Cannot get volume attributes (%S), %08lx", + attr.ObjectName, status); + has_buggy_open (false); + flags (0); + if (!in_vol) + NtClose (vol); + return false; + } + flags (ffai_buf.ffai.FileSystemAttributes); + name_len (ffai_buf.ffai.MaximumComponentNameLength); +/* Should be reevaluated for each new OS. Right now this mask is valid up + to Vista. The important point here is to test only flags indicating + capabilities and to ignore flags indicating a specific state of this + volume. At present these flags to ignore are FILE_VOLUME_IS_COMPRESSED + and FILE_READ_ONLY_VOLUME. */ #define GETVOLINFO_VALID_MASK (0x003701ffUL) #define TEST_GVI(f,m) (((f) & GETVOLINFO_VALID_MASK) == (m)) - /* Volume quotas are potentially supported since Samba 3.0, object ids and - the unicode on disk flag since Samba 3.2. */ +/* Volume quotas are potentially supported since Samba 3.0, object ids and + the unicode on disk flag since Samba 3.2. */ #define SAMBA_IGNORE (FILE_VOLUME_QUOTAS \ - | FILE_SUPPORTS_OBJECT_IDS \ - | FILE_UNICODE_ON_DISK) + | FILE_SUPPORTS_OBJECT_IDS \ + | FILE_UNICODE_ON_DISK) #define FS_IS_SAMBA TEST_GVI(flags () & ~SAMBA_IGNORE, \ - FILE_CASE_SENSITIVE_SEARCH \ - | FILE_CASE_PRESERVED_NAMES \ - | FILE_PERSISTENT_ACLS) + FILE_CASE_SENSITIVE_SEARCH \ + | FILE_CASE_PRESERVED_NAMES \ + | FILE_PERSISTENT_ACLS) #define FS_IS_NETAPP_DATAONTAP TEST_GVI(flags (), \ - FILE_CASE_SENSITIVE_SEARCH \ - | FILE_CASE_PRESERVED_NAMES \ - | FILE_UNICODE_ON_DISK \ - | FILE_PERSISTENT_ACLS \ - | FILE_NAMED_STREAMS) - RtlInitCountedUnicodeString (&fsname, ffai_buf.ffai.FileSystemName, - ffai_buf.ffai.FileSystemNameLength); - is_fat (RtlEqualUnicodePathPrefix (&fsname, L"FAT", TRUE)); - RtlInitUnicodeString (&testname, L"NTFS"); - if (is_remote_drive ()) - { - /* This always fails on NT4. */ - status = NtQueryVolumeInformationFile (vol, &io, &ffoi, sizeof ffoi, - FileFsObjectIdInformation); - if (NT_SUCCESS (status)) - { - smb_extended_info *extended_info = (smb_extended_info *) - &ffoi.ExtendedInfo; - if (extended_info->samba_magic == SAMBA_EXTENDED_INFO_MAGIC) - { - is_samba (true); - samba_version (extended_info->samba_version); - } - } - /* Test for Samba on NT4 or for older Samba releases not supporting - extended info. */ - if (!is_samba ()) - is_samba (RtlEqualUnicodeString (&fsname, &testname, FALSE) - && FS_IS_SAMBA); - - is_netapp (!is_samba () - && RtlEqualUnicodeString (&fsname, &testname, FALSE) - && FS_IS_NETAPP_DATAONTAP); - } - is_ntfs (RtlEqualUnicodeString (&fsname, &testname, FALSE) - && !is_samba () && !is_netapp ()); - RtlInitUnicodeString (&testname, L"NFS"); - is_nfs (RtlEqualUnicodeString (&fsname, &testname, FALSE)); - is_cdrom (ffdi.DeviceType == FILE_DEVICE_CD_ROM); - - has_acls ((flags () & FS_PERSISTENT_ACLS) - && (allow_smbntsec || !is_remote_drive ())); - hasgood_inode (((flags () & FILE_PERSISTENT_ACLS) && !is_netapp ()) - || is_nfs ()); - /* Known file systems with buggy open calls. Further explanation - in fhandler.cc (fhandler_disk_file::open). */ - RtlInitUnicodeString (&testname, L"SUNWNFS"); - has_buggy_open (RtlEqualUnicodeString (&fsname, &testname, FALSE)); - - if (!in_vol) - NtClose (vol); - return true; - } - - void - path_conv::fillin (HANDLE h) - { - IO_STATUS_BLOCK io; - FILE_BASIC_INFORMATION fbi; - - if (NT_SUCCESS (NtQueryInformationFile (h, &io, &fbi, sizeof fbi, - FileBasicInformation))) - fileattr = fbi.FileAttributes; - else - fileattr = INVALID_FILE_ATTRIBUTES; - } - - void - path_conv::set_normalized_path (const char *path_copy) - { - char *p = strchr (path_copy, '\0'); - size_t n = 1 + p - path_copy; - - normalized_path = path + sizeof (path) - n; - - char *eopath = strchr (path, '\0'); - if (normalized_path > eopath) - normalized_path_size = n; - else - { - normalized_path = (char *) cmalloc_abort (HEAP_STR, n); - normalized_path_size = 0; - } - - memcpy (normalized_path, path_copy, n); - } - - WCHAR tfx_chars[] NO_COPY = { - 0, 1, 2, 3, 4, 5, 6, 7, - 8, 9, 10, 11, 12, 13, 14, 15, - 16, 17, 18, 19, 20, 21, 22, 23, - 24, 25, 26, 27, 28, 29, 30, 31, - 32, '!', 0xf000 | '"', '#', '$', '%', '&', 39, - '(', ')', 0xf000 | '*', '+', ',', '-', '.', '/', - '0', '1', '2', '3', '4', '5', '6', '7', - '8', '9', 0xf000 | ':', ';', 0xf000 | '<', '=', 0xf000 | '>', 0xf000 | '?', - '@', 'A', 'B', 'C', 'D', 'E', 'F', 'G', - 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', - 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', - 'X', 'Y', 'Z', '[', '\\', ']', '^', '_', - '`', 'a', 'b', 'c', 'd', 'e', 'f', 'g', - 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', - 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', - 'x', 'y', 'z', '{', 0xf000 | '|', '}', '~', 127 - }; - - WCHAR tfx_chars_managed[] NO_COPY = { - 0, 1, 2, 3, 4, 5, 6, 7, - 8, 9, 10, 11, 12, 13, 14, 15, - 16, 17, 18, 19, 20, 21, 22, 23, - 24, 25, 26, 27, 28, 29, 30, 31, - 32, '!', 0xf000 | '"', '#', '$', '%', '&', 39, - '(', ')', 0xf000 | '*', '+', ',', '-', '.', '/', - '0', '1', '2', '3', '4', '5', '6', '7', - '8', '9', 0xf000 | ':', ';', 0xf000 | '<', '=', 0xf000 | '>', 0xf000 | '?', - '@', 0xf000 | 'A', 0xf000 | 'B', 0xf000 | 'C', 0xf000 | 'D', 0xf000 | 'E', 0xf000 | 'F', 0xf000 | 'G', - 0xf000 | 'H', 0xf000 | 'I', 0xf000 | 'J', 0xf000 | 'K', 0xf000 | 'L', 0xf000 | 'M', 0xf000 | 'N', 0xf000 | 'O', - 0xf000 | 'P', 0xf000 | 'Q', 0xf000 | 'R', 0xf000 | 'S', 0xf000 | 'T', 0xf000 | 'U', 0xf000 | 'V', 0xf000 | 'W', - 0xf000 | 'X', 0xf000 | 'Y', 0xf000 | 'Z', '[', '\\', ']', '^', '_', - '`', 'a', 'b', 'c', 'd', 'e', 'f', 'g', - 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', - 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', - 'x', 'y', 'z', '{', 0xf000 | '|', '}', '~', 127 - }; - - static void - transform_chars (PUNICODE_STRING upath, USHORT start_idx, bool managed) - { - register PWCHAR buf = upath->Buffer; - register PWCHAR end = buf + upath->Length / sizeof (WCHAR) - 1; - register PWCHAR tfx = managed ? tfx_chars_managed : tfx_chars; - for (buf += start_idx; buf <= end; ++buf) - if (*buf < 128) - *buf = tfx[*buf]; -#if 0 - /* Win32 can't handle trailing dots and spaces. Transform the last of them - to the private use area, too, to create a valid Win32 filename. */ - if (*end == L'\\') - --end; - if (*end == L'.' || *end == L' ') - *end |= 0xf000; -#endif - } - - PUNICODE_STRING - get_nt_native_path (const char *path, UNICODE_STRING& upath, bool managed) - { - upath.Length = 0; - if (path[0] == '/') /* special path w/o NT path representation. */ - str2uni_cat (upath, path); - else if (path[0] != '\\') /* X:\... or NUL, etc. */ - { - str2uni_cat (upath, "\\??\\"); - str2uni_cat (upath, path); - transform_chars (&upath, 7, managed); - } - else if (path[1] != '\\') /* \Device\... */ - str2uni_cat (upath, path); - else if ((path[2] != '.' && path[2] != '?') - || path[3] != '\\') /* \\server\share\... */ - { - str2uni_cat (upath, "\\??\\UNC\\"); - str2uni_cat (upath, path + 2); - transform_chars (&upath, 8, managed); - } - else /* \\.\device or \\?\foo */ - { - str2uni_cat (upath, "\\??\\"); - str2uni_cat (upath, path + 4); - } - return &upath; - } - - PUNICODE_STRING - path_conv::get_nt_native_path () - { - if (!wide_path) - { - uni_path.Length = 0; - uni_path.MaximumLength = (strlen (path) + 10) * sizeof (WCHAR); - wide_path = (PWCHAR) cmalloc_abort (HEAP_STR, uni_path.MaximumLength); - uni_path.Buffer = wide_path; - ::get_nt_native_path (path, uni_path, isencoded ()); - } - return &uni_path; - } - - POBJECT_ATTRIBUTES - path_conv::get_object_attr (OBJECT_ATTRIBUTES &attr, SECURITY_ATTRIBUTES &sa) - { - if (!get_nt_native_path ()) - return NULL; - InitializeObjectAttributes (&attr, &uni_path, - OBJ_CASE_INSENSITIVE - | (sa.bInheritHandle ? OBJ_INHERIT : 0), - NULL, sa.lpSecurityDescriptor); - return &attr; - } - - PWCHAR - path_conv::get_wide_win32_path (PWCHAR wc) - { - get_nt_native_path (); - if (!wide_path || wide_path[1] != L'?') /* Native NT device path */ - return NULL; - wcscpy (wc, wide_path); - wc[1] = L'\\'; - return wc; - } - - void - warn_msdos (const char *src) - { - if (user_shared->warned_msdos || !dos_file_warning) - return; - tmp_pathbuf tp; - char *posix_path = tp.c_get (); - small_printf ("cygwin warning:\n"); - if (cygwin_conv_path (CCP_WIN_A_TO_POSIX | CCP_RELATIVE, src, - posix_path, NT_MAX_PATH)) - small_printf (" MS-DOS style path detected: %s\n POSIX equivalent preferred.\n", - src); - else - small_printf (" MS-DOS style path detected: %s\n Preferred POSIX equivalent is: %s\n", - src, posix_path); - small_printf (" CYGWIN environment variable option \"nodosfilewarning\" turns off this warning.\n" - " Consult the user's guide for more details about POSIX paths:\n" - " http://cygwin.com/cygwin-ug-net/using.html#using-pathnames\n"); - user_shared->warned_msdos = true; - } - - static DWORD - getfileattr (const char *path, bool managed) /* path has to be always absolute. */ - { - tmp_pathbuf tp; - UNICODE_STRING upath; - OBJECT_ATTRIBUTES attr; - FILE_BASIC_INFORMATION fbi; - NTSTATUS status; - IO_STATUS_BLOCK io; - - tp.u_get (&upath); - InitializeObjectAttributes (&attr, &upath, OBJ_CASE_INSENSITIVE, NULL, NULL); - get_nt_native_path (path, upath, managed); - - status = NtQueryAttributesFile (&attr, &fbi); - if (NT_SUCCESS (status)) - return fbi.FileAttributes; - - if (status != STATUS_OBJECT_NAME_NOT_FOUND - && status != STATUS_NO_SUCH_FILE) /* File not found on 9x share */ - { - /* File exists but access denied. Try to get attribute through - directory query. */ - UNICODE_STRING dirname, basename; - HANDLE dir; - FILE_DIRECTORY_INFORMATION fdi; - - RtlSplitUnicodePath (&upath, &dirname, &basename); - InitializeObjectAttributes (&attr, &dirname, - OBJ_CASE_INSENSITIVE, NULL, NULL); - status = NtOpenFile (&dir, SYNCHRONIZE | FILE_LIST_DIRECTORY, - &attr, &io, FILE_SHARE_VALID_FLAGS, - FILE_SYNCHRONOUS_IO_NONALERT - | FILE_OPEN_FOR_BACKUP_INTENT - | FILE_DIRECTORY_FILE); - if (NT_SUCCESS (status)) - { - status = NtQueryDirectoryFile (dir, NULL, NULL, 0, &io, - &fdi, sizeof fdi, - FileDirectoryInformation, - TRUE, &basename, TRUE); - NtClose (dir); - if (NT_SUCCESS (status) || status == STATUS_BUFFER_OVERFLOW) - return fdi.FileAttributes; - } - } - SetLastError (RtlNtStatusToDosError (status)); - return INVALID_FILE_ATTRIBUTES; - } - - /* Convert an arbitrary path SRC to a pure Win32 path, suitable for - passing to Win32 API routines. - - If an error occurs, `error' is set to the errno value. - Otherwise it is set to 0. - - follow_mode values: - SYMLINK_FOLLOW - convert to PATH symlink points to - SYMLINK_NOFOLLOW - convert to PATH of symlink itself - SYMLINK_IGNORE - do not check PATH for symlinks - SYMLINK_CONTENTS - just return symlink contents - */ - - /* TODO: This implementation is only preliminary. For internal - purposes it's necessary to have a path_conv::check function which - takes a UNICODE_STRING src path, otherwise we waste a lot of time - for converting back and forth. The below implementation does - realy nothing but converting to char *, until path_conv handles - wide-char paths directly. */ - void - path_conv::check (const UNICODE_STRING *src, unsigned opt, - const suffix_info *suffixes) - { - tmp_pathbuf tp; - char *path = tp.c_get (); - - user_shared->warned_msdos = true; - sys_wcstombs (path, NT_MAX_PATH, src->Buffer, src->Length / sizeof (WCHAR)); - path_conv::check (path, opt, suffixes); - } - - void - path_conv::check (const char *src, unsigned opt, - const suffix_info *suffixes) - { - /* The tmp_buf array is used when expanding symlinks. It is NT_MAX_PATH * 2 - in length so that we can hold the expanded symlink plus a trailer. */ - tmp_pathbuf tp; - char *path_copy = tp.c_get (); - char *pathbuf = tp.c_get (); - char *tmp_buf = tp.t_get (); - symlink_info sym; - bool need_directory = 0; - bool saw_symlinks = 0; - bool is_relpath; - char *tail, *path_end; - -#if 0 - static path_conv last_path_conv; - static char last_src[CYG_MAX_PATH]; - - if (*last_src && strcmp (last_src, src) == 0) - { - *this = last_path_conv; - return; - } -#endif - - myfault efault; - if (efault.faulted ()) - { - error = EFAULT; - return; - } - int loop = 0; - path_flags = 0; - known_suffix = NULL; - fileattr = INVALID_FILE_ATTRIBUTES; - if (wide_path) - cfree (wide_path); - wide_path = NULL; - case_clash = false; - memset (&dev, 0, sizeof (dev)); - fs.clear (); - if (!normalized_path_size && normalized_path) - cfree (normalized_path); - normalized_path = NULL; - int component = 0; // Number of translated components - - if (!(opt & PC_NULLEMPTY)) - error = 0; - else if (!*src) - { - error = ENOENT; - return; - } - - bool is_msdos = false; - /* This loop handles symlink expansion. */ - for (;;) - { - MALLOC_CHECK; - assert (src); - - is_relpath = !isabspath (src); - error = normalize_posix_path (src, path_copy, tail); - if (error > 0) - return; - if (error < 0) - { - if (component == 0) - is_msdos = true; - error = 0; - } - - /* Detect if the user was looking for a directory. We have to strip the - trailing slash initially while trying to add extensions but take it - into account during processing */ - if (tail > path_copy + 2 && isslash (tail[-1])) - { - need_directory = 1; - *--tail = '\0'; - } - path_end = tail; - - /* Scan path_copy from right to left looking either for a symlink - or an actual existing file. If an existing file is found, just - return. If a symlink is found, exit the for loop. - Also: be careful to preserve the errno returned from - symlink.check as the caller may need it. */ - /* FIXME: Do we have to worry about multiple \'s here? */ - component = 0; // Number of translated components - sym.contents[0] = '\0'; - - int symlen = 0; - - for (unsigned pflags_or = opt & PC_NO_ACCESS_CHECK; ; pflags_or = 0) - { - const suffix_info *suff; - char *full_path; - - /* Don't allow symlink.check to set anything in the path_conv - class if we're working on an inner component of the path */ - if (component) - { - suff = NULL; - sym.pflags = 0; - full_path = pathbuf; - } - else - { - suff = suffixes; - sym.pflags = path_flags; - full_path = this->path; - } - - /* Convert to native path spec sans symbolic link info. */ - error = mount_table->conv_to_win32_path (path_copy, full_path, dev, - &sym.pflags); - - if (error) - return; - - sym.pflags |= pflags_or; - - if (dev.major == DEV_CYGDRIVE_MAJOR) - { - if (!component) - fileattr = FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_READONLY; - else - { - fileattr = getfileattr (this->path, sym.pflags & MOUNT_ENC); - dev.devn = FH_FS; - } - goto out; - } - else if (dev == FH_DEV) - { - dev.devn = FH_FS; -#if 0 - fileattr = getfileattr (this->path, sym.pflags & MOUNT_ENC); - if (!component && fileattr == INVALID_FILE_ATTRIBUTES) - { - fileattr = FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_READONLY; - goto out; - } -#endif - } - else if (isvirtual_dev (dev.devn)) - { - /* FIXME: Calling build_fhandler here is not the right way to handle this. */ - fhandler_virtual *fh = (fhandler_virtual *) build_fh_dev (dev, path_copy); - int file_type = fh->exists (); - if (file_type == -2) - { - fh->fill_filebuf (); - symlen = sym.set (fh->get_filebuf ()); - } - delete fh; - switch (file_type) - { - case 1: - case 2: - if (component == 0) - fileattr = FILE_ATTRIBUTE_DIRECTORY; - break; - case -1: - if (component == 0) - fileattr = 0; - break; - case -2: /* /proc/self or /proc//symlinks */ - goto is_virtual_symlink; - case -3: /* /proc//fd/pipe:[] */ - if (component == 0) - { - fileattr = 0; - dev.parse (FH_PIPE); - } - break; - case -4: /* /proc//fd/socket:[] */ - if (component == 0) - { - fileattr = 0; - dev.parse (FH_TCP); - } - break; - default: - if (component == 0) - fileattr = INVALID_FILE_ATTRIBUTES; - goto virtual_component_retry; - } - if (component == 0 || dev.devn != FH_NETDRIVE) - path_flags |= PATH_RO; - goto out; - } - /* devn should not be a device. If it is, then stop parsing now. */ - else if (dev.devn != FH_FS) - { - fileattr = 0; - path_flags = sym.pflags; - if (component) - { - error = ENOTDIR; - return; - } - goto out; /* Found a device. Stop parsing. */ - } - - /* If path is only a drivename, Windows interprets it as the - current working directory on this drive instead of the root - dir which is what we want. So we need the trailing backslash - in this case. */ - if (full_path[0] && full_path[1] == ':' && full_path[2] == '\0') - { - full_path[2] = '\\'; - full_path[3] = '\0'; - } - - symlen = sym.check (full_path, suff, opt, fs); - - is_virtual_symlink: - - if (sym.isdevice) - { - dev.parse (sym.major, sym.minor); - dev.setfs (1); - dev.mode = sym.mode; - fileattr = sym.fileattr; - goto out; - } - - if (sym.pflags & PATH_SOCKET) - { - if (component) - { - error = ENOTDIR; - return; - } - fileattr = sym.fileattr; - dev.parse (FH_UNIX); - dev.setfs (1); - goto out; - } - - if (sym.case_clash) - { - if (pcheck_case == PCHECK_STRICT) - { - case_clash = true; - error = ENOENT; - goto out; - } - /* If pcheck_case==PCHECK_ADJUST the case_clash is remembered - if the last component is concerned. This allows functions - which shall create files to avoid overriding already existing - files with another case. */ - if (!component) - case_clash = true; - } - if (!(opt & PC_SYM_IGNORE)) - { - if (!component) - { - fileattr = sym.fileattr; - path_flags = sym.pflags; - } - - /* If symlink.check found an existing non-symlink file, then - it sets the appropriate flag. It also sets any suffix found - into `ext_here'. */ - if (!sym.issymlink && sym.fileattr != INVALID_FILE_ATTRIBUTES) - { - error = sym.error; - if (component == 0) - add_ext_from_sym (sym); - else if (!(sym.fileattr & FILE_ATTRIBUTE_DIRECTORY)) - { - error = ENOTDIR; - goto out; - } - if (pcheck_case == PCHECK_RELAXED) - goto out; // file found - /* Avoid further symlink evaluation. Only case checks are - done now. */ - opt |= PC_SYM_IGNORE; - } - /* Found a symlink if symlen > 0. If component == 0, then the - src path itself was a symlink. If !follow_mode then - we're done. Otherwise we have to insert the path found - into the full path that we are building and perform all of - these operations again on the newly derived path. */ - else if (symlen > 0) - { - saw_symlinks = 1; - if (component == 0 && !need_directory && !(opt & PC_SYM_FOLLOW)) - { - set_symlink (symlen); // last component of path is a symlink. - if (opt & PC_SYM_CONTENTS) - { - strcpy (path, sym.contents); - goto out; - } - add_ext_from_sym (sym); - if (pcheck_case == PCHECK_RELAXED) - goto out; - /* Avoid further symlink evaluation. Only case checks are - done now. */ - opt |= PC_SYM_IGNORE; - } - else - break; - } - else if (sym.error && sym.error != ENOENT && sym.error != ENOSHARE) - { - error = sym.error; - goto out; - } - /* No existing file found. */ - } - - virtual_component_retry: - /* Find the new "tail" of the path, e.g. in '/for/bar/baz', - /baz is the tail. */ - if (tail != path_end) - *tail = '/'; - while (--tail > path_copy + 1 && *tail != '/') {} - /* Exit loop if there is no tail or we are at the - beginning of a UNC path */ - if (tail <= path_copy + 1) - goto out; // all done - - /* Haven't found an existing pathname component yet. - Pinch off the tail and try again. */ - *tail = '\0'; - component++; - } - - /* Arrive here if above loop detected a symlink. */ - if (++loop > SYMLOOP_MAX) - { - error = ELOOP; // Eep. - return; - } - - MALLOC_CHECK; - - - /* Place the link content, possibly with head and/or tail, in tmp_buf */ - - char *headptr; - if (isabspath (sym.contents)) - headptr = tmp_buf; /* absolute path */ - else - { - /* Copy the first part of the path (with ending /) and point to the end. */ - char *prevtail = tail; - while (--prevtail > path_copy && *prevtail != '/') {} - int headlen = prevtail - path_copy + 1;; - memcpy (tmp_buf, path_copy, headlen); - headptr = &tmp_buf[headlen]; - } - - /* Make sure there is enough space */ - if (headptr + symlen >= tmp_buf + (2 * NT_MAX_PATH)) - { - too_long: - error = ENAMETOOLONG; - strcpy (path, "::ENAMETOOLONG::"); - return; - } - - /* Copy the symlink contents to the end of tmp_buf. - Convert slashes. */ - for (char *p = sym.contents; *p; p++) - *headptr++ = *p == '\\' ? '/' : *p; - *headptr = '\0'; - - /* Copy any tail component (with the 0) */ - if (tail++ < path_end) - { - /* Add a slash if needed. There is space. */ - if (*(headptr - 1) != '/') - *headptr++ = '/'; - int taillen = path_end - tail + 1; - if (headptr + taillen > tmp_buf + (2 * NT_MAX_PATH)) - goto too_long; - memcpy (headptr, tail, taillen); - } - - /* Evaluate everything all over again. */ - src = tmp_buf; - } - - if (!(opt & PC_SYM_CONTENTS)) - add_ext_from_sym (sym); - - out: - if (dev.devn == FH_NETDRIVE && component) - { - /* This case indicates a non-existant resp. a non-retrievable - share. This happens for instance if the share is a printer. - In this case the path must not be treated like a FH_NETDRIVE, - but like a FH_FS instead, so the usual open call for files - is used on it. */ - dev.parse (FH_FS); - } - else if (isvirtual_dev (dev.devn) && fileattr == INVALID_FILE_ATTRIBUTES) - { - error = dev.devn == FH_NETDRIVE ? ENOSHARE : ENOENT; - return; - } - else if (!need_directory || error) - /* nothing to do */; - else if (fileattr == INVALID_FILE_ATTRIBUTES) - strcat (path, "\\"); /* Reattach trailing dirsep in native path. */ - else if (fileattr & FILE_ATTRIBUTE_DIRECTORY) - path_flags &= ~PATH_SYMLINK; - else - { - debug_printf ("%s is a non-directory", path); - error = ENOTDIR; - return; - } - - if (dev.isfs ()) - { - if (strncmp (path, "\\\\.\\", 4)) - { - if (!tail || tail == path) - /* nothing */; - else if (tail[-1] != '\\') - *tail = '\0'; - else - { - error = ENOENT; - return; - } - } - - /* FS has been checked already for existing files. */ - if (exists () || fs.update (get_nt_native_path (), NULL)) - { - debug_printf ("this->path(%s), has_acls(%d)", path, fs.has_acls ()); - if (fs.has_acls () && allow_ntsec) - set_exec (0); /* We really don't know if this is executable or not here - but set it to not executable since it will be figured out - later by anything which cares about this. */ - } - if (exec_state () != dont_know_if_executable) - /* ok */; - else if (isdir ()) - set_exec (1); - else if (issymlink () || issocket ()) - set_exec (0); - } - - if (opt & PC_NOFULL) - { - if (is_relpath) - mkrelpath (this->path); - if (need_directory) - { - size_t n = strlen (this->path); - /* Do not add trailing \ to UNC device names like \\.\a: */ - if (this->path[n - 1] != '\\' && - (strncmp (this->path, "\\\\.\\", 4) != 0)) - { - this->path[n] = '\\'; - this->path[n + 1] = '\0'; - } - } - } - - if (saw_symlinks) - set_has_symlinks (); - - if (!error && !isdir () && !(path_flags & PATH_ALL_EXEC)) - { - const char *p = strchr (path, '\0') - 4; - if (p >= path && - (ascii_strcasematch (".exe", p) || - ascii_strcasematch (".bat", p) || - ascii_strcasematch (".com", p))) - path_flags |= PATH_EXEC; - } - - if (!(opt & PC_POSIX)) - normalized_path_size = 0; - else - { - if (tail < path_end && tail > path_copy + 1) - *tail = '/'; - set_normalized_path (path_copy); - if (is_msdos && !(opt & PC_NOWARN)) - warn_msdos (src); - } - -#if 0 - if (!error) - { - last_path_conv = *this; - strcpy (last_src, src); - } -#endif - } - - path_conv::~path_conv () - { - if (!normalized_path_size && normalized_path) - { - cfree (normalized_path); - normalized_path = NULL; - } - if (wide_path) - { - cfree (wide_path); - wide_path = NULL; - } - } - - bool - path_conv::is_binary () - { - tmp_pathbuf tp; - PWCHAR bintest = tp.w_get (); - DWORD bin; - return exec_state () == is_executable - && RtlEqualUnicodePathSuffix (get_nt_native_path (), L".exe", TRUE) - && GetBinaryTypeW (get_wide_win32_path (bintest), &bin); - } - - /* Normalize a Win32 path. - /'s are converted to \'s in the process. - All duplicate \'s, except for 2 leading \'s, are deleted. - - The result is 0 for success, or an errno error value. - FIXME: A lot of this should be mergeable with the POSIX critter. */ - int - normalize_win32_path (const char *src, char *dst, char *&tail) - { - const char *src_start = src; - bool beg_src_slash = isdirsep (src[0]); - - tail = dst; - /* Skip long path name prefixes in Win32 or NT syntax. */ - if (beg_src_slash && (src[1] == '?' || isdirsep (src[1])) - && src[2] == '?' && isdirsep (src[3])) - { - src += 4; - if (src[1] != ':') /* native UNC path */ - { - src += 2; /* Fortunately the first char is not copied... */ - beg_src_slash = true; - } - else - beg_src_slash = isdirsep (src[0]); - } - if (beg_src_slash && isdirsep (src[1])) - { - if (isdirsep (src[2])) - { - /* More than two slashes are just folded into one. */ - src += 2; - while (isdirsep (src[1])) - ++src; - } - else - { - /* Two slashes start a network or device path. */ - *tail++ = '\\'; - src++; - if (src[1] == '.' && isdirsep (src[2])) - { - *tail++ = '\\'; - *tail++ = '.'; - src += 2; - } - } - } - if (tail == dst && !isdrive (src) && *src != '/') - { - if (beg_src_slash) - tail += cygheap->cwd.get_drive (dst); - else if (!cygheap->cwd.get (dst, 0)) - return get_errno (); - else - { - tail = strchr (tail, '\0'); - *tail++ = '\\'; - } - } - - while (*src) - { - /* Strip duplicate /'s. */ - if (isdirsep (src[0]) && isdirsep (src[1])) - src++; - /* Ignore "./". */ - else if (src[0] == '.' && isdirsep (src[1]) - && (src == src_start || isdirsep (src[-1]))) - src += 2; - - /* Backup if "..". */ - else if (src[0] == '.' && src[1] == '.' - /* dst must be greater than dst_start */ - && tail[-1] == '\\') - { - if (!isdirsep (src[2]) && src[2] != '\0') - *tail++ = *src++; - else - { - /* Back up over /, but not if it's the first one. */ - if (tail > dst + 1) - tail--; - /* Now back up to the next /. */ - while (tail > dst + 1 && tail[-1] != '\\' && tail[-2] != ':') - tail--; - src += 2; - if (isdirsep (*src)) - src++; - } - } - /* Otherwise, add char to result. */ - else - { - if (*src == '/') - *tail++ = '\\'; - else - *tail++ = *src; - src++; - } - if ((tail - dst) >= NT_MAX_PATH) - return ENAMETOOLONG; - } - if (tail > dst + 1 && tail[-1] == '.' && tail[-2] == '\\') - tail--; - *tail = '\0'; - debug_printf ("%s = normalize_win32_path (%s)", dst, src_start); - return 0; - } - - /* Various utilities. */ - - /* nofinalslash: Remove trailing / and \ from SRC (except for the - first one). It is ok for src == dst. */ - - void __stdcall - nofinalslash (const char *src, char *dst) - { - int len = strlen (src); - if (src != dst) - memcpy (dst, src, len + 1); - while (len > 1 && isdirsep (dst[--len])) - dst[len] = '\0'; - } - - /* conv_path_list: Convert a list of path names to/from Win32/POSIX. */ - - static int - conv_path_list (const char *src, char *dst, size_t size, int to_posix) - { - tmp_pathbuf tp; - char src_delim, dst_delim; - cygwin_conv_path_t conv_fn; - size_t len; - - if (to_posix) - { - src_delim = ';'; - dst_delim = ':'; - conv_fn = CCP_WIN_A_TO_POSIX | CCP_RELATIVE; - } - else - { - src_delim = ':'; - dst_delim = ';'; - conv_fn = CCP_POSIX_TO_WIN_A | CCP_RELATIVE; - } - - char *srcbuf; - len = strlen (src) + 1; - if (len <= NT_MAX_PATH * sizeof (WCHAR)) - srcbuf = (char *) tp.w_get (); - else - srcbuf = (char *) alloca (len); - - int err = 0; - char *d = dst - 1; - bool saw_empty = false; - do - { - char *s = strccpy (srcbuf, &src, src_delim); - size_t len = s - srcbuf; - if (len >= NT_MAX_PATH) - { - err = ENAMETOOLONG; - break; - } - if (len) - { - ++d; - err = cygwin_conv_path (conv_fn, srcbuf, d, size - (d - dst)); - } - else if (!to_posix) - { - ++d; - err = cygwin_conv_path (conv_fn, ".", d, size - (d - dst)); - } - else - { - if (to_posix == ENV_CVT) - saw_empty = true; - continue; - } - if (err) - break; - d = strchr (d, '\0'); - *d = dst_delim; - } - while (*src++); - - if (saw_empty) - err = EIDRM; - - if (d < dst) - d++; - *d = '\0'; - return err; - } - - /********************** Symbolic Link Support **************************/ - - /* Create a symlink from FROMPATH to TOPATH. */ - - /* If TRUE create symlinks as Windows shortcuts, if false create symlinks - as normal files with magic number and system bit set. */ - bool allow_winsymlinks = true; - - extern "C" int - symlink (const char *oldpath, const char *newpath) - { - return symlink_worker (oldpath, newpath, allow_winsymlinks, false); - } - - int - symlink_worker (const char *oldpath, const char *newpath, bool use_winsym, - bool isdevice) - { - int res = -1; - size_t len; - path_conv win32_newpath, win32_oldpath; - char *buf, *cp; - SECURITY_ATTRIBUTES sa = sec_none_nih; - security_descriptor sd; - OBJECT_ATTRIBUTES attr; - IO_STATUS_BLOCK io; - NTSTATUS status; - HANDLE fh; - FILE_BASIC_INFORMATION fbi; - tmp_pathbuf tp; - - /* POSIX says that empty 'newpath' is invalid input while empty - 'oldpath' is valid -- it's symlink resolver job to verify if - symlink contents point to existing filesystem object */ - myfault efault; - if (efault.faulted (EFAULT)) - goto done; - if (!*oldpath || !*newpath) - { - set_errno (ENOENT); - goto done; - } - - if (strlen (oldpath) > SYMLINK_MAX) - { - set_errno (ENAMETOOLONG); - goto done; - } - - len = strlen (newpath); - /* Trailing dirsep is a no-no. */ - if (isdirsep (newpath[len - 1])) - { - set_errno (ENOENT); - goto done; - } - /* We need the normalized full path below. */ - win32_newpath.check (newpath, PC_SYM_NOFOLLOW | PC_POSIX, stat_suffixes); - if (use_winsym && !win32_newpath.exists () - && (isdevice || !win32_newpath.fs_is_nfs ())) - { - char *newplnk = tp.c_get (); - stpcpy (stpcpy (newplnk, newpath), ".lnk"); - win32_newpath.check (newplnk, PC_SYM_NOFOLLOW | PC_POSIX); - } - - if (win32_newpath.error) - { - set_errno (win32_newpath.case_clash ? ECASECLASH : win32_newpath.error); - goto done; - } - - syscall_printf ("symlink (%s, %S)", oldpath, - win32_newpath.get_nt_native_path ()); - - if ((!isdevice && win32_newpath.exists ()) - || win32_newpath.is_auto_device ()) - { - set_errno (EEXIST); - goto done; - } - - if (!isdevice && win32_newpath.fs_is_nfs ()) - { - /* On NFS, create symlinks by calling NtCreateFile with an EA of type - NfsSymlinkTargetName containing ... the symlink target name. */ - PFILE_FULL_EA_INFORMATION pffei = (PFILE_FULL_EA_INFORMATION) tp.w_get (); - pffei->NextEntryOffset = 0; - pffei->Flags = 0; - pffei->EaNameLength = sizeof (NFS_SYML_TARGET) - 1; - char *EaValue = stpcpy (pffei->EaName, NFS_SYML_TARGET) + 1; - pffei->EaValueLength = sizeof (WCHAR) * - (sys_mbstowcs ((PWCHAR) EaValue, NT_MAX_PATH, oldpath) - 1); - status = NtCreateFile (&fh, FILE_WRITE_DATA | FILE_WRITE_EA | SYNCHRONIZE, - win32_newpath.get_object_attr (attr, sa), - &io, NULL, FILE_ATTRIBUTE_SYSTEM, - FILE_SHARE_VALID_FLAGS, FILE_CREATE, - FILE_SYNCHRONOUS_IO_NONALERT - | FILE_OPEN_FOR_BACKUP_INTENT, - pffei, NT_MAX_PATH * sizeof (WCHAR)); - if (!NT_SUCCESS (status)) - { - __seterrno_from_nt_status (status); - goto done; - } - NtClose (fh); - res = 0; - goto done; - } - - if (use_winsym) - { - ITEMIDLIST *pidl = NULL; - size_t full_len = 0; - unsigned short oldpath_len, desc_len, relpath_len, pidl_len = 0; - char desc[MAX_PATH + 1], *relpath; - - if (!isdevice) - { - /* First create an IDLIST to learn how big our shortcut is - going to be. */ - IShellFolder *psl; - - /* The symlink target is relative to the directory in which - the symlink gets created, not relative to the cwd. Therefore - we have to mangle the path quite a bit before calling path_conv. */ - if (!isabspath (oldpath)) - { - len = strrchr (win32_newpath.normalized_path, '/') - - win32_newpath.normalized_path + 1; - char *absoldpath = tp.t_get (); - stpcpy (stpncpy (absoldpath, win32_newpath.normalized_path, len), - oldpath); - win32_oldpath.check (absoldpath, PC_SYM_NOFOLLOW, stat_suffixes); - } - else - win32_oldpath.check (oldpath, PC_SYM_NOFOLLOW, stat_suffixes); - if (SUCCEEDED (SHGetDesktopFolder (&psl))) - { - WCHAR wc_path[win32_oldpath.get_wide_win32_path_len () + 1]; - win32_oldpath.get_wide_win32_path (wc_path); - /* Amazing but true: Even though the ParseDisplayName method - takes a wide char path name, it does not understand the - Win32 prefix for long pathnames! So we have to tack off - the prefix and convert the path to the "normal" syntax - for ParseDisplayName. */ - WCHAR *wc = wc_path + 4; - if (wc[1] != L':') /* native UNC path */ - *(wc += 2) = L'\\'; - HRESULT res; - if (SUCCEEDED (res = psl->ParseDisplayName (NULL, NULL, wc, NULL, - &pidl, NULL))) - { - ITEMIDLIST *p; - - for (p = pidl; p->mkid.cb > 0; - p = (ITEMIDLIST *)((char *) p + p->mkid.cb)) - ; - pidl_len = (char *) p - (char *) pidl + 2; - } - psl->Release (); - } - } - /* Compute size of shortcut file. */ - full_len = sizeof (win_shortcut_hdr); - if (pidl_len) - full_len += sizeof (unsigned short) + pidl_len; - oldpath_len = strlen (oldpath); - /* Unfortunately the length of the description is restricted to a - length of MAX_PATH up to NT4, and to a length of 2000 bytes - since W2K. We don't want to add considerations for the different - lengths and even 2000 bytes is not enough for long path names. - So what we do here is to set the description to the POSIX path - only if the path is not longer than MAX_PATH characters. We - append the full path name after the regular shortcut data - (see below), which works fine with Windows Explorer as well - as older Cygwin versions (as long as the whole file isn't bigger - than 8K). The description field is only used for backward - compatibility to older Cygwin versions and those versions are - not capable of handling long path names anyway. */ - desc_len = stpcpy (desc, oldpath_len > MAX_PATH - ? "[path too long]" : oldpath) - desc; - full_len += sizeof (unsigned short) + desc_len; - /* Devices get the oldpath string unchanged as relative path. */ - if (isdevice) - { - relpath_len = oldpath_len; - stpcpy (relpath = tp.c_get (), oldpath); - } - else - { - relpath_len = strlen (win32_oldpath.get_win32 ()); - stpcpy (relpath = tp.c_get (), win32_oldpath.get_win32 ()); - } - full_len += sizeof (unsigned short) + relpath_len; - full_len += sizeof (unsigned short) + oldpath_len; - /* 1 byte more for trailing 0 written by stpcpy. */ - if (full_len < NT_MAX_PATH * sizeof (WCHAR)) - buf = (char *) tp.w_get (); - else - buf = (char *) alloca (full_len + 1); - - /* Create shortcut header */ - win_shortcut_hdr *shortcut_header = (win_shortcut_hdr *) buf; - memset (shortcut_header, 0, sizeof *shortcut_header); - shortcut_header->size = sizeof *shortcut_header; - shortcut_header->magic = GUID_shortcut; - shortcut_header->flags = (WSH_FLAG_DESC | WSH_FLAG_RELPATH); - if (pidl) - shortcut_header->flags |= WSH_FLAG_IDLIST; - shortcut_header->run = SW_NORMAL; - cp = buf + sizeof (win_shortcut_hdr); - - /* Create IDLIST */ - if (pidl) - { - *(unsigned short *)cp = pidl_len; - memcpy (cp += 2, pidl, pidl_len); - cp += pidl_len; - CoTaskMemFree (pidl); - } - - /* Create description */ - *(unsigned short *)cp = desc_len; - cp = stpcpy (cp += 2, desc); - - /* Create relpath */ - *(unsigned short *)cp = relpath_len; - cp = stpcpy (cp += 2, relpath); - - /* Append the POSIX path after the regular shortcut data for - the long path support. */ - *(unsigned short *)cp = oldpath_len; - cp = stpcpy (cp += 2, oldpath); - } - else - { - /* This is the old technique creating a symlink. */ - buf = tp.c_get (); - /* Note that the terminating nul is written. */ - cp = stpcpy (stpcpy (buf, SYMLINK_COOKIE), oldpath) + 1; - } - - if (isdevice && win32_newpath.exists ()) - { - status = NtOpenFile (&fh, FILE_WRITE_ATTRIBUTES, - win32_newpath.get_object_attr (attr, sa), - &io, 0, FILE_OPEN_FOR_BACKUP_INTENT); - if (!NT_SUCCESS (status)) - { - __seterrno_from_nt_status (status); - goto done; - } - fbi.CreationTime.QuadPart = fbi.LastAccessTime.QuadPart - = fbi.LastWriteTime.QuadPart = fbi.ChangeTime.QuadPart = 0LL; - fbi.FileAttributes = FILE_ATTRIBUTE_NORMAL; - status = NtSetInformationFile (fh, &io, &fbi, sizeof fbi, - FileBasicInformation); - NtClose (fh); - if (!NT_SUCCESS (status)) - { - __seterrno_from_nt_status (status); - goto done; - } - } - if (allow_ntsec && win32_newpath.has_acls ()) - set_security_attribute (S_IFLNK | STD_RBITS | STD_WBITS, - &sa, sd); - status = NtCreateFile (&fh, DELETE | FILE_GENERIC_WRITE, - win32_newpath.get_object_attr (attr, sa), - &io, NULL, FILE_ATTRIBUTE_NORMAL, - FILE_SHARE_VALID_FLAGS, - isdevice ? FILE_OVERWRITE_IF : FILE_CREATE, - FILE_SYNCHRONOUS_IO_NONALERT - | FILE_NON_DIRECTORY_FILE - | FILE_OPEN_FOR_BACKUP_INTENT, - NULL, 0); - if (!NT_SUCCESS (status)) - { - __seterrno_from_nt_status (status); - goto done; - } - status = NtWriteFile (fh, NULL, NULL, NULL, &io, buf, cp - buf, NULL, NULL); - if (NT_SUCCESS (status) && io.Information == (ULONG) (cp - buf)) - { - fbi.CreationTime.QuadPart = fbi.LastAccessTime.QuadPart - = fbi.LastWriteTime.QuadPart = fbi.ChangeTime.QuadPart = 0LL; - fbi.FileAttributes = use_winsym ? FILE_ATTRIBUTE_READONLY - : FILE_ATTRIBUTE_SYSTEM; - status = NtSetInformationFile (fh, &io, &fbi, sizeof fbi, - FileBasicInformation); - if (!NT_SUCCESS (status)) - debug_printf ("Setting attributes failed, status = %p", status); - res = 0; - } - else - { - __seterrno_from_nt_status (status); - FILE_DISPOSITION_INFORMATION fdi = { TRUE }; - status = NtSetInformationFile (fh, &io, &fdi, sizeof fdi, - FileDispositionInformation); - if (!NT_SUCCESS (status)) - debug_printf ("Setting delete dispostion failed, status = %p", status); - } - NtClose (fh); - - done: - syscall_printf ("%d = symlink_worker (%s, %s, %d, %d)", res, oldpath, - newpath, use_winsym, isdevice); - return res; - } - - static bool - cmp_shortcut_header (win_shortcut_hdr *file_header) - { - /* A Cygwin or U/Win shortcut only contains a description and a relpath. - Cygwin shortcuts also might contain an ITEMIDLIST. The run type is - always set to SW_NORMAL. */ - return file_header->size == sizeof (win_shortcut_hdr) - && !memcmp (&file_header->magic, &GUID_shortcut, sizeof GUID_shortcut) - && (file_header->flags & ~WSH_FLAG_IDLIST) - == (WSH_FLAG_DESC | WSH_FLAG_RELPATH) - && file_header->run == SW_NORMAL; - } - - int - symlink_info::check_shortcut (HANDLE in_h) - { - tmp_pathbuf tp; - win_shortcut_hdr *file_header; - char *buf, *cp; - unsigned short len; - int res = 0; - UNICODE_STRING same = { 0, 0, (PWCHAR) L"" }; - OBJECT_ATTRIBUTES attr; - NTSTATUS status; - HANDLE h; - IO_STATUS_BLOCK io; - FILE_STANDARD_INFORMATION fsi; - - InitializeObjectAttributes (&attr, &same, 0, in_h, NULL); - status = NtOpenFile (&h, FILE_READ_DATA | SYNCHRONIZE, - &attr, &io, FILE_SHARE_VALID_FLAGS, - FILE_OPEN_FOR_BACKUP_INTENT - | FILE_SYNCHRONOUS_IO_NONALERT); - if (!NT_SUCCESS (status)) - { - set_error (EIO); - return 0; - } - status = NtQueryInformationFile (h, &io, &fsi, sizeof fsi, - FileStandardInformation); - if (!NT_SUCCESS (status)) - { - set_error (EIO); - goto out; - } - if (fsi.EndOfFile.QuadPart <= sizeof (win_shortcut_hdr) - || fsi.EndOfFile.QuadPart > 4 * 65536) - goto out; - if (fsi.EndOfFile.LowPart < NT_MAX_PATH * sizeof (WCHAR)) - buf = (char *) tp.w_get (); - else - buf = (char *) alloca (fsi.EndOfFile.LowPart + 1); - if (!NT_SUCCESS (NtReadFile (h, NULL, NULL, NULL, - &io, buf, fsi.EndOfFile.LowPart, NULL, NULL))) - { - set_error (EIO); - goto out; - } - file_header = (win_shortcut_hdr *) buf; - if (io.Information != fsi.EndOfFile.LowPart - || !cmp_shortcut_header (file_header)) - goto file_not_symlink; - cp = buf + sizeof (win_shortcut_hdr); - if (file_header->flags & WSH_FLAG_IDLIST) /* Skip ITEMIDLIST */ - cp += *(unsigned short *) cp + 2; - if (!(len = *(unsigned short *) cp)) - goto file_not_symlink; - cp += 2; - /* Check if this is a device file - these start with the sequence :\\ */ - if (strncmp (cp, ":\\", 2) == 0) - res = strlen (strcpy (contents, cp)); /* Don't mess with device files */ - else - { - /* Has appended full path? If so, use it instead of description. */ - unsigned short relpath_len = *(unsigned short *) (cp + len); - if (cp + len + 2 + relpath_len < buf + fsi.EndOfFile.LowPart) - { - cp += len + 2 + relpath_len; - len = *(unsigned short *) cp; - cp += 2; - } - if (len > SYMLINK_MAX) - goto file_not_symlink; - cp[len] = '\0'; - res = posixify (cp); - } - if (res) /* It's a symlink. */ - pflags = PATH_SYMLINK | PATH_LNK; - return res; - - file_not_symlink: - /* Not a symlink, see if executable. */ - if (!(pflags & PATH_ALL_EXEC) && has_exec_chars ((const char *) &file_header, io.Information)) - pflags |= PATH_EXEC; - - out: - NtClose (h); - return 0; - } - - int - symlink_info::check_sysfile (HANDLE in_h) - { - char cookie_buf[sizeof (SYMLINK_COOKIE) - 1]; - char srcbuf[SYMLINK_MAX + 2]; - int res = 0; - UNICODE_STRING same = { 0, 0, (PWCHAR) L"" }; - OBJECT_ATTRIBUTES attr; - NTSTATUS status; - HANDLE h; - IO_STATUS_BLOCK io; - - InitializeObjectAttributes (&attr, &same, 0, in_h, NULL); - status = NtOpenFile (&h, FILE_READ_DATA | SYNCHRONIZE, - &attr, &io, FILE_SHARE_VALID_FLAGS, - FILE_OPEN_FOR_BACKUP_INTENT - | FILE_SYNCHRONOUS_IO_NONALERT); - if (!NT_SUCCESS (status)) - set_error (EIO); - else if (!NT_SUCCESS (status = NtReadFile (h, NULL, NULL, NULL, &io, - cookie_buf, sizeof (cookie_buf), - NULL, NULL))) - { - debug_printf ("ReadFile1 failed"); - if (status != STATUS_END_OF_FILE) - set_error (EIO); - } - else if (io.Information == sizeof (cookie_buf) - && memcmp (cookie_buf, SYMLINK_COOKIE, sizeof (cookie_buf)) == 0) - { - /* It's a symlink. */ - pflags = PATH_SYMLINK; - - status = NtReadFile (h, NULL, NULL, NULL, &io, srcbuf, - SYMLINK_MAX + 2, NULL, NULL); - if (!NT_SUCCESS (status)) - { - debug_printf ("ReadFile2 failed"); - if (status != STATUS_END_OF_FILE) - set_error (EIO); - } - else if (io.Information > SYMLINK_MAX + 1) - debug_printf ("symlink string too long"); - else - res = posixify (srcbuf); - } - else if (io.Information == sizeof (cookie_buf) - && memcmp (cookie_buf, SOCKET_COOKIE, sizeof (cookie_buf)) == 0) - pflags |= PATH_SOCKET; - else - { - /* Not a symlink, see if executable. */ - if (pflags & PATH_ALL_EXEC) - /* Nothing to do */; - else if (has_exec_chars (cookie_buf, io.Information)) - pflags |= PATH_EXEC; - else - pflags |= PATH_NOTEXEC; + FILE_CASE_SENSITIVE_SEARCH \ + | FILE_CASE_PRESERVED_NAMES \ + | FILE_UNICODE_ON_DISK \ + | FILE_PERSISTENT_ACLS \ + | FILE_NAMED_STREAMS) + RtlInitCountedUnicodeString (&fsname, ffai_buf.ffai.FileSystemName, + ffai_buf.ffai.FileSystemNameLength); + is_fat (RtlEqualUnicodePathPrefix (&fsname, L"FAT", TRUE)); + RtlInitUnicodeString (&testname, L"NTFS"); + if (is_remote_drive ()) + { + /* This always fails on NT4. */ + status = NtQueryVolumeInformationFile (vol, &io, &ffoi, sizeof ffoi, + FileFsObjectIdInformation); + if (NT_SUCCESS (status)) + { + smb_extended_info *extended_info = (smb_extended_info *) + &ffoi.ExtendedInfo; + if (extended_info->samba_magic == SAMBA_EXTENDED_INFO_MAGIC) + { + is_samba (true); + samba_version (extended_info->samba_version); + } } - NtClose (h); - return res; - } + /* Test for Samba on NT4 or for older Samba releases not supporting + extended info. */ + if (!is_samba ()) + is_samba (RtlEqualUnicodeString (&fsname, &testname, FALSE) + && FS_IS_SAMBA); - int - symlink_info::check_reparse_point (HANDLE h) - { - tmp_pathbuf tp; - NTSTATUS status; - IO_STATUS_BLOCK io; - PREPARSE_DATA_BUFFER rp = (PREPARSE_DATA_BUFFER) tp.c_get (); - char srcbuf[SYMLINK_MAX + 7]; + is_netapp (!is_samba () + && RtlEqualUnicodeString (&fsname, &testname, FALSE) + && FS_IS_NETAPP_DATAONTAP); + } + is_ntfs (RtlEqualUnicodeString (&fsname, &testname, FALSE) + && !is_samba () && !is_netapp ()); + RtlInitUnicodeString (&testname, L"NFS"); + is_nfs (RtlEqualUnicodeString (&fsname, &testname, FALSE)); + is_cdrom (ffdi.DeviceType == FILE_DEVICE_CD_ROM); - status = NtFsControlFile (h, NULL, NULL, NULL, &io, FSCTL_GET_REPARSE_POINT, - NULL, 0, (LPVOID) rp, - MAXIMUM_REPARSE_DATA_BUFFER_SIZE); - if (!NT_SUCCESS (status)) - { - debug_printf ("NtFsControlFile(FSCTL_GET_REPARSE_POINT) failed, %p", - status); - set_error (EIO); - return 0; - } - if (rp->ReparseTag == IO_REPARSE_TAG_SYMLINK) - { - sys_wcstombs (srcbuf, SYMLINK_MAX + 1, - (WCHAR *)((char *)rp->SymbolicLinkReparseBuffer.PathBuffer - + rp->SymbolicLinkReparseBuffer.SubstituteNameOffset), - rp->SymbolicLinkReparseBuffer.SubstituteNameLength / sizeof (WCHAR)); - pflags = PATH_SYMLINK | PATH_REP; - fileattr &= ~FILE_ATTRIBUTE_DIRECTORY; - } - else if (rp->ReparseTag == IO_REPARSE_TAG_MOUNT_POINT) - { - if (rp->SymbolicLinkReparseBuffer.PrintNameLength == 0) - { - /* Likely a volume mount point. Not treated as symlink. */ - return 0; - } - sys_wcstombs (srcbuf, SYMLINK_MAX + 1, - (WCHAR *)((char *)rp->MountPointReparseBuffer.PathBuffer - + rp->MountPointReparseBuffer.SubstituteNameOffset), - rp->MountPointReparseBuffer.SubstituteNameLength / sizeof (WCHAR)); - pflags = PATH_SYMLINK | PATH_REP; - fileattr &= ~FILE_ATTRIBUTE_DIRECTORY; - } - return posixify (srcbuf); - } + has_acls ((flags () & FS_PERSISTENT_ACLS) + && (allow_smbntsec || !is_remote_drive ())); + hasgood_inode (((flags () & FILE_PERSISTENT_ACLS) && !is_netapp ()) + || is_nfs ()); + /* Known file systems with buggy open calls. Further explanation + in fhandler.cc (fhandler_disk_file::open). */ + RtlInitUnicodeString (&testname, L"SUNWNFS"); + has_buggy_open (RtlEqualUnicodeString (&fsname, &testname, FALSE)); - int - symlink_info::check_nfs_symlink (HANDLE h) - { - tmp_pathbuf tp; - NTSTATUS status; - IO_STATUS_BLOCK io; - struct { - FILE_GET_EA_INFORMATION fgei; - char buf[sizeof (NFS_SYML_TARGET)]; - } fgei_buf; - PFILE_FULL_EA_INFORMATION pffei; - int res = 0; + if (!in_vol) + NtClose (vol); + return true; +} - /* To find out if the file is a symlink and to get the symlink target, - try to fetch the NfsSymlinkTargetName EA. */ - fgei_buf.fgei.NextEntryOffset = 0; - fgei_buf.fgei.EaNameLength = sizeof (NFS_SYML_TARGET) - 1; - stpcpy (fgei_buf.fgei.EaName, NFS_SYML_TARGET); - pffei = (PFILE_FULL_EA_INFORMATION) tp.w_get (); - status = NtQueryEaFile (h, &io, pffei, NT_MAX_PATH * sizeof (WCHAR), TRUE, - &fgei_buf.fgei, sizeof fgei_buf, NULL, TRUE); - if (NT_SUCCESS (status) && pffei->EaValueLength > 0) - { - PWCHAR spath = (PWCHAR) - (pffei->EaName + pffei->EaNameLength + 1); - res = sys_wcstombs (contents, SYMLINK_MAX + 1, - spath, pffei->EaValueLength); - pflags = PATH_SYMLINK; - } - return res; - } +void +path_conv::fillin (HANDLE h) +{ + IO_STATUS_BLOCK io; + FILE_BASIC_INFORMATION fbi; - int - symlink_info::posixify (char *srcbuf) - { - /* The definition for a path in a native symlink is a bit weird. The Flags - value seem to contain 0 for absolute paths (stored as NT native path) - and 1 for relative paths. Relative paths are paths not starting with a - drive letter. These are not converted to NT native, but stored as - given. A path starting with a single backslash is relative to the - current drive thus a "relative" value (Flags == 1). - Funny enough it's possible to store paths with slashes instead of - backslashes, but they are evaluated incorrectly by subsequent Windows - calls like CreateFile (ERROR_INVALID_NAME). So, what we do here is to - take paths starting with slashes at face value, evaluating them as - Cygwin specific POSIX paths. - A path starting with two slashes(!) or backslashes is converted into an - NT UNC path. Unfortunately, in contrast to POSIX rules, paths starting - with three or more (back)slashes are also converted into UNC paths, - just incorrectly sticking to one redundant leading backslashe. We go - along with this behaviour to avoid scenarios in which native tools access - other files than Cygwin. - The above rules are used exactly the same way on Cygwin specific symlinks - (sysfiles and shortcuts) to eliminate non-POSIX paths in the output. */ + if (NT_SUCCESS (NtQueryInformationFile (h, &io, &fbi, sizeof fbi, + FileBasicInformation))) + fileattr = fbi.FileAttributes; + else + fileattr = INVALID_FILE_ATTRIBUTES; +} - /* Eliminate native NT prefixes. */ - if (srcbuf[0] == '\\' && !strncmp (srcbuf + 1, "??\\", 3)) - { - srcbuf += 4; - if (srcbuf[1] != ':') /* native UNC path */ - *(srcbuf += 2) = '\\'; - } - if (isdrive (srcbuf)) - mount_table->conv_to_posix_path (srcbuf, contents, 0); - else if (srcbuf[0] == '\\') - { - if (srcbuf[1] == '\\') /* UNC path */ - slashify (srcbuf, contents, 0); - else /* Paths starting with \ are current drive relative. */ - { - char cvtbuf[SYMLINK_MAX + 1]; +void +path_conv::set_normalized_path (const char *path_copy) +{ + char *p = strchr (path_copy, '\0'); + size_t n = 1 + p - path_copy; - stpcpy (cvtbuf + cygheap->cwd.get_drive (cvtbuf), srcbuf); - mount_table->conv_to_posix_path (cvtbuf, contents, 0); - } - } - else /* Everything else is taken as is. */ - slashify (srcbuf, contents, 0); - return strlen (contents); - } + normalized_path = path + sizeof (path) - n; - enum - { - SCAN_BEG, - SCAN_LNK, - SCAN_HASLNK, - SCAN_JUSTCHECK, - SCAN_JUSTCHECKTHIS, /* Never try to append a suffix. */ - SCAN_APPENDLNK, - SCAN_EXTRALNK, - SCAN_DONE, - }; + char *eopath = strchr (path, '\0'); + if (normalized_path > eopath) + normalized_path_size = n; + else + { + normalized_path = (char *) cmalloc_abort (HEAP_STR, n); + normalized_path_size = 0; + } - class suffix_scan - { - const suffix_info *suffixes, *suffixes_start; - int nextstate; - char *eopath; - public: - const char *path; - char *has (const char *, const suffix_info *); - int next (); - int lnk_match () {return nextstate >= SCAN_APPENDLNK;} - }; + memcpy (normalized_path, path_copy, n); +} - char * - suffix_scan::has (const char *in_path, const suffix_info *in_suffixes) - { - nextstate = SCAN_BEG; - suffixes = suffixes_start = in_suffixes; +WCHAR tfx_chars[] NO_COPY = { + 0, 1, 2, 3, 4, 5, 6, 7, + 8, 9, 10, 11, 12, 13, 14, 15, + 16, 17, 18, 19, 20, 21, 22, 23, + 24, 25, 26, 27, 28, 29, 30, 31, + 32, '!', 0xf000 | '"', '#', '$', '%', '&', 39, + '(', ')', 0xf000 | '*', '+', ',', '-', '.', '/', + '0', '1', '2', '3', '4', '5', '6', '7', + '8', '9', 0xf000 | ':', ';', 0xf000 | '<', '=', 0xf000 | '>', 0xf000 | '?', + '@', 'A', 'B', 'C', 'D', 'E', 'F', 'G', + 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', + 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', + 'X', 'Y', 'Z', '[', '\\', ']', '^', '_', + '`', 'a', 'b', 'c', 'd', 'e', 'f', 'g', + 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', + 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', + 'x', 'y', 'z', '{', 0xf000 | '|', '}', '~', 127 +}; - const char *fname = strrchr (in_path, '\\'); - fname = fname ? fname + 1 : in_path; - char *ext_here = strrchr (fname, '.'); - path = in_path; - eopath = strchr (path, '\0'); +WCHAR tfx_chars_managed[] NO_COPY = { + 0, 1, 2, 3, 4, 5, 6, 7, + 8, 9, 10, 11, 12, 13, 14, 15, + 16, 17, 18, 19, 20, 21, 22, 23, + 24, 25, 26, 27, 28, 29, 30, 31, + 32, '!', 0xf000 | '"', '#', '$', '%', '&', 39, + '(', ')', 0xf000 | '*', '+', ',', '-', '.', '/', + '0', '1', '2', '3', '4', '5', '6', '7', + '8', '9', 0xf000 | ':', ';', 0xf000 | '<', '=', 0xf000 | '>', 0xf000 | '?', + '@', 0xf000 | 'A', 0xf000 | 'B', 0xf000 | 'C', 0xf000 | 'D', 0xf000 | 'E', 0xf000 | 'F', 0xf000 | 'G', + 0xf000 | 'H', 0xf000 | 'I', 0xf000 | 'J', 0xf000 | 'K', 0xf000 | 'L', 0xf000 | 'M', 0xf000 | 'N', 0xf000 | 'O', + 0xf000 | 'P', 0xf000 | 'Q', 0xf000 | 'R', 0xf000 | 'S', 0xf000 | 'T', 0xf000 | 'U', 0xf000 | 'V', 0xf000 | 'W', + 0xf000 | 'X', 0xf000 | 'Y', 0xf000 | 'Z', '[', '\\', ']', '^', '_', + '`', 'a', 'b', 'c', 'd', 'e', 'f', 'g', + 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', + 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', + 'x', 'y', 'z', '{', 0xf000 | '|', '}', '~', 127 +}; - if (!ext_here) - goto noext; +static void +transform_chars (PUNICODE_STRING upath, USHORT start_idx, bool managed) +{ + register PWCHAR buf = upath->Buffer; + register PWCHAR end = buf + upath->Length / sizeof (WCHAR) - 1; + register PWCHAR tfx = managed ? tfx_chars_managed : tfx_chars; + for (buf += start_idx; buf <= end; ++buf) + if (*buf < 128) + *buf = tfx[*buf]; +#if 0 + /* Win32 can't handle trailing dots and spaces. Transform the last of them + to the private use area, too, to create a valid Win32 filename. */ + if (*end == L'\\') + --end; + if (*end == L'.' || *end == L' ') + *end |= 0xf000; +#endif +} - if (suffixes) - { - /* Check if the extension matches a known extension */ - for (const suffix_info *ex = in_suffixes; ex->name != NULL; ex++) - if (ascii_strcasematch (ext_here, ex->name)) +PUNICODE_STRING +get_nt_native_path (const char *path, UNICODE_STRING& upath, bool managed) +{ + upath.Length = 0; + if (path[0] == '/') /* special path w/o NT path representation. */ + str2uni_cat (upath, path); + else if (path[0] != '\\') /* X:\... or NUL, etc. */ + { + str2uni_cat (upath, "\\??\\"); + str2uni_cat (upath, path); + transform_chars (&upath, 7, managed); + } + else if (path[1] != '\\') /* \Device\... */ + str2uni_cat (upath, path); + else if ((path[2] != '.' && path[2] != '?') + || path[3] != '\\') /* \\server\share\... */ + { + str2uni_cat (upath, "\\??\\UNC\\"); + str2uni_cat (upath, path + 2); + transform_chars (&upath, 8, managed); + } + else /* \\.\device or \\?\foo */ + { + str2uni_cat (upath, "\\??\\"); + str2uni_cat (upath, path + 4); + } + return &upath; +} + +PUNICODE_STRING +path_conv::get_nt_native_path () +{ + if (!wide_path) + { + uni_path.Length = 0; + uni_path.MaximumLength = (strlen (path) + 10) * sizeof (WCHAR); + wide_path = (PWCHAR) cmalloc_abort (HEAP_STR, uni_path.MaximumLength); + uni_path.Buffer = wide_path; + ::get_nt_native_path (path, uni_path, isencoded ()); + } + return &uni_path; +} + +POBJECT_ATTRIBUTES +path_conv::get_object_attr (OBJECT_ATTRIBUTES &attr, SECURITY_ATTRIBUTES &sa) +{ + if (!get_nt_native_path ()) + return NULL; + InitializeObjectAttributes (&attr, &uni_path, + OBJ_CASE_INSENSITIVE + | (sa.bInheritHandle ? OBJ_INHERIT : 0), + NULL, sa.lpSecurityDescriptor); + return &attr; +} + +PWCHAR +path_conv::get_wide_win32_path (PWCHAR wc) +{ + get_nt_native_path (); + if (!wide_path || wide_path[1] != L'?') /* Native NT device path */ + return NULL; + wcscpy (wc, wide_path); + wc[1] = L'\\'; + return wc; +} + +void +warn_msdos (const char *src) +{ + if (user_shared->warned_msdos || !dos_file_warning) + return; + tmp_pathbuf tp; + char *posix_path = tp.c_get (); + small_printf ("cygwin warning:\n"); + if (cygwin_conv_path (CCP_WIN_A_TO_POSIX | CCP_RELATIVE, src, + posix_path, NT_MAX_PATH)) + small_printf (" MS-DOS style path detected: %s\n POSIX equivalent preferred.\n", + src); + else + small_printf (" MS-DOS style path detected: %s\n Preferred POSIX equivalent is: %s\n", + src, posix_path); + small_printf (" CYGWIN environment variable option \"nodosfilewarning\" turns off this warning.\n" + " Consult the user's guide for more details about POSIX paths:\n" + " http://cygwin.com/cygwin-ug-net/using.html#using-pathnames\n"); + user_shared->warned_msdos = true; +} + +static DWORD +getfileattr (const char *path, bool managed) /* path has to be always absolute. */ +{ + tmp_pathbuf tp; + UNICODE_STRING upath; + OBJECT_ATTRIBUTES attr; + FILE_BASIC_INFORMATION fbi; + NTSTATUS status; + IO_STATUS_BLOCK io; + + tp.u_get (&upath); + InitializeObjectAttributes (&attr, &upath, OBJ_CASE_INSENSITIVE, NULL, NULL); + get_nt_native_path (path, upath, managed); + + status = NtQueryAttributesFile (&attr, &fbi); + if (NT_SUCCESS (status)) + return fbi.FileAttributes; + + if (status != STATUS_OBJECT_NAME_NOT_FOUND + && status != STATUS_NO_SUCH_FILE) /* File not found on 9x share */ + { + /* File exists but access denied. Try to get attribute through + directory query. */ + UNICODE_STRING dirname, basename; + HANDLE dir; + FILE_DIRECTORY_INFORMATION fdi; + + RtlSplitUnicodePath (&upath, &dirname, &basename); + InitializeObjectAttributes (&attr, &dirname, + OBJ_CASE_INSENSITIVE, NULL, NULL); + status = NtOpenFile (&dir, SYNCHRONIZE | FILE_LIST_DIRECTORY, + &attr, &io, FILE_SHARE_VALID_FLAGS, + FILE_SYNCHRONOUS_IO_NONALERT + | FILE_OPEN_FOR_BACKUP_INTENT + | FILE_DIRECTORY_FILE); + if (NT_SUCCESS (status)) + { + status = NtQueryDirectoryFile (dir, NULL, NULL, 0, &io, + &fdi, sizeof fdi, + FileDirectoryInformation, + TRUE, &basename, TRUE); + NtClose (dir); + if (NT_SUCCESS (status) || status == STATUS_BUFFER_OVERFLOW) + return fdi.FileAttributes; + } + } + SetLastError (RtlNtStatusToDosError (status)); + return INVALID_FILE_ATTRIBUTES; +} + +/* Convert an arbitrary path SRC to a pure Win32 path, suitable for + passing to Win32 API routines. + + If an error occurs, `error' is set to the errno value. + Otherwise it is set to 0. + + follow_mode values: + SYMLINK_FOLLOW - convert to PATH symlink points to + SYMLINK_NOFOLLOW - convert to PATH of symlink itself + SYMLINK_IGNORE - do not check PATH for symlinks + SYMLINK_CONTENTS - just return symlink contents +*/ + +/* TODO: This implementation is only preliminary. For internal + purposes it's necessary to have a path_conv::check function which + takes a UNICODE_STRING src path, otherwise we waste a lot of time + for converting back and forth. The below implementation does + realy nothing but converting to char *, until path_conv handles + wide-char paths directly. */ +void +path_conv::check (const UNICODE_STRING *src, unsigned opt, + const suffix_info *suffixes) +{ + tmp_pathbuf tp; + char *path = tp.c_get (); + + user_shared->warned_msdos = true; + sys_wcstombs (path, NT_MAX_PATH, src->Buffer, src->Length / sizeof (WCHAR)); + path_conv::check (path, opt, suffixes); +} + +void +path_conv::check (const char *src, unsigned opt, + const suffix_info *suffixes) +{ + /* The tmp_buf array is used when expanding symlinks. It is NT_MAX_PATH * 2 + in length so that we can hold the expanded symlink plus a trailer. */ + tmp_pathbuf tp; + char *path_copy = tp.c_get (); + char *pathbuf = tp.c_get (); + char *tmp_buf = tp.t_get (); + symlink_info sym; + bool need_directory = 0; + bool saw_symlinks = 0; + bool is_relpath; + char *tail, *path_end; + +#if 0 + static path_conv last_path_conv; + static char last_src[CYG_MAX_PATH]; + + if (*last_src && strcmp (last_src, src) == 0) + { + *this = last_path_conv; + return; + } +#endif + + myfault efault; + if (efault.faulted ()) + { + error = EFAULT; + return; + } + int loop = 0; + path_flags = 0; + known_suffix = NULL; + fileattr = INVALID_FILE_ATTRIBUTES; + if (wide_path) + cfree (wide_path); + wide_path = NULL; + case_clash = false; + memset (&dev, 0, sizeof (dev)); + fs.clear (); + if (!normalized_path_size && normalized_path) + cfree (normalized_path); + normalized_path = NULL; + int component = 0; // Number of translated components + + if (!(opt & PC_NULLEMPTY)) + error = 0; + else if (!*src) + { + error = ENOENT; + return; + } + + bool is_msdos = false; + /* This loop handles symlink expansion. */ + for (;;) + { + MALLOC_CHECK; + assert (src); + + is_relpath = !isabspath (src); + error = normalize_posix_path (src, path_copy, tail); + if (error > 0) + return; + if (error < 0) + { + if (component == 0) + is_msdos = true; + error = 0; + } + + /* Detect if the user was looking for a directory. We have to strip the + trailing slash initially while trying to add extensions but take it + into account during processing */ + if (tail > path_copy + 2 && isslash (tail[-1])) + { + need_directory = 1; + *--tail = '\0'; + } + path_end = tail; + + /* Scan path_copy from right to left looking either for a symlink + or an actual existing file. If an existing file is found, just + return. If a symlink is found, exit the for loop. + Also: be careful to preserve the errno returned from + symlink.check as the caller may need it. */ + /* FIXME: Do we have to worry about multiple \'s here? */ + component = 0; // Number of translated components + sym.contents[0] = '\0'; + + int symlen = 0; + + for (unsigned pflags_or = opt & PC_NO_ACCESS_CHECK; ; pflags_or = 0) + { + const suffix_info *suff; + char *full_path; + + /* Don't allow symlink.check to set anything in the path_conv + class if we're working on an inner component of the path */ + if (component) { - nextstate = SCAN_JUSTCHECK; - suffixes = NULL; /* Has an extension so don't scan for one. */ - goto done; + suff = NULL; + sym.pflags = 0; + full_path = pathbuf; } - } - - /* Didn't match. Use last resort -- .lnk. */ - if (ascii_strcasematch (ext_here, ".lnk")) - { - nextstate = SCAN_HASLNK; - suffixes = NULL; - } - - noext: - ext_here = eopath; - - done: - /* Avoid attaching suffixes if the resulting filename would be invalid. */ - if (eopath - fname > NAME_MAX - 4) - { - nextstate = SCAN_JUSTCHECKTHIS; - suffixes = NULL; - } - return ext_here; - } - - int - suffix_scan::next () - { - for (;;) - { - if (!suffixes) - switch (nextstate) - { - case SCAN_BEG: - suffixes = suffixes_start; - if (!suffixes) - { - nextstate = SCAN_LNK; - return 1; - } - nextstate = SCAN_EXTRALNK; - /* fall through to suffix checking below */ - break; - case SCAN_HASLNK: - nextstate = SCAN_APPENDLNK; /* Skip SCAN_BEG */ - return 1; - case SCAN_EXTRALNK: - nextstate = SCAN_DONE; - *eopath = '\0'; - return 0; - case SCAN_JUSTCHECK: - nextstate = SCAN_LNK; - return 1; - case SCAN_JUSTCHECKTHIS: - nextstate = SCAN_DONE; - return 1; - case SCAN_LNK: - case SCAN_APPENDLNK: - strcat (eopath, ".lnk"); - nextstate = SCAN_DONE; - return 1; - default: - *eopath = '\0'; - return 0; - } - - while (suffixes && suffixes->name) - if (nextstate == SCAN_EXTRALNK && !suffixes->addon) - suffixes++; else { - strcpy (eopath, suffixes->name); - if (nextstate == SCAN_EXTRALNK) - strcat (eopath, ".lnk"); - suffixes++; - return 1; + suff = suffixes; + sym.pflags = path_flags; + full_path = this->path; } - suffixes = NULL; - } - } - bool - symlink_info::set_error (int in_errno) - { - bool res; - if (!(pflags & PATH_NO_ACCESS_CHECK) || in_errno == ENAMETOOLONG || in_errno == EIO) - { - error = in_errno; - res = true; - } - else if (in_errno == ENOENT) - res = true; - else - { - fileattr = FILE_ATTRIBUTE_NORMAL; - res = false; - } - return res; - } + /* Convert to native path spec sans symbolic link info. */ + error = mount_table->conv_to_win32_path (path_copy, full_path, dev, + &sym.pflags); - bool - symlink_info::parse_device (const char *contents) - { - char *endptr; - _major_t mymajor; - _major_t myminor; - _mode_t mymode; + if (error) + return; - mymajor = strtol (contents += 2, &endptr, 16); - if (endptr == contents) - return isdevice = false; + sym.pflags |= pflags_or; - contents = endptr; - myminor = strtol (++contents, &endptr, 16); - if (endptr == contents) - return isdevice = false; - - contents = endptr; - mymode = strtol (++contents, &endptr, 16); - if (endptr == contents) - return isdevice = false; - - if ((mymode & S_IFMT) == S_IFIFO) - { - mymajor = _major (FH_FIFO); - myminor = _minor (FH_FIFO); - } - - major = mymajor; - minor = myminor; - mode = mymode; - return isdevice = true; - } - - /* Check if PATH is a symlink. PATH must be a valid Win32 path name. - - If PATH is a symlink, put the value of the symlink--the file to - which it points--into BUF. The value stored in BUF is not - necessarily null terminated. BUFLEN is the length of BUF; only up - to BUFLEN characters will be stored in BUF. BUF may be NULL, in - which case nothing will be stored. - - Set *SYML if PATH is a symlink. - - Set *EXEC if PATH appears to be executable. This is an efficiency - hack because we sometimes have to open the file anyhow. *EXEC will - not be set for every executable file. - - Return -1 on error, 0 if PATH is not a symlink, or the length - stored into BUF if PATH is a symlink. */ - - int - symlink_info::check (char *path, const suffix_info *suffixes, unsigned opt, - fs_info &fs) - { - HANDLE h = NULL; - int res = 0; - suffix_scan suffix; - contents[0] = '\0'; - - issymlink = true; - isdevice = false; - ext_here = suffix.has (path, suffixes); - extn = ext_here - path; - major = 0; - minor = 0; - mode = 0; - pflags &= ~(PATH_SYMLINK | PATH_LNK | PATH_REP); - case_clash = false; - - /* TODO: Temporarily do all char->UNICODE conversion here. This should - already be slightly faster than using Ascii functions. */ - tmp_pathbuf tp; - UNICODE_STRING upath; - OBJECT_ATTRIBUTES attr; - tp.u_get (&upath); - InitializeObjectAttributes (&attr, &upath, OBJ_CASE_INSENSITIVE, NULL, NULL); - - while (suffix.next ()) - { - FILE_BASIC_INFORMATION fbi; - NTSTATUS status; - IO_STATUS_BLOCK io; - bool no_ea = false; - - error = 0; - get_nt_native_path (suffix.path, upath, pflags & MOUNT_ENC); - if (h) - { - NtClose (h); - h = NULL; - } - /* The EA given to NtCreateFile allows to get a handle to a symlink on - an NFS share, rather than getting a handle to the target of the - symlink (which would spoil the task of this method quite a bit). - Fortunately it's ignored on other file systems so we don't have - to special case NFS too much. */ - status = NtCreateFile (&h, - READ_CONTROL | FILE_READ_ATTRIBUTES | FILE_READ_EA, - &attr, &io, NULL, FILE_ATTRIBUTE_NORMAL, - FILE_SHARE_VALID_FLAGS, FILE_OPEN, - FILE_OPEN_REPARSE_POINT - | FILE_OPEN_FOR_BACKUP_INTENT, - &nfs_aol_ffei, sizeof nfs_aol_ffei); - if (status == STATUS_ACCESS_DENIED || status == STATUS_EAS_NOT_SUPPORTED) /* No right to access EAs? */ - { - no_ea = true; - void *eabuf; - ULONG easize; - if (status == STATUS_EAS_NOT_SUPPORTED) - { - eabuf = NULL; - easize = 0; - } - else - { - eabuf = (void *) &nfs_aol_ffei; - easize = sizeof nfs_aol_ffei; - } - status = NtCreateFile (&h, - READ_CONTROL | FILE_READ_ATTRIBUTES, - &attr, &io, NULL, FILE_ATTRIBUTE_NORMAL, - FILE_SHARE_VALID_FLAGS, FILE_OPEN, - FILE_OPEN_REPARSE_POINT - | FILE_OPEN_FOR_BACKUP_INTENT, - eabuf, easize); - } - if (NT_SUCCESS (status) - && NT_SUCCESS (status - = NtQueryInformationFile (h, &io, &fbi, sizeof fbi, - FileBasicInformation))) - fileattr = fbi.FileAttributes; - else - { - debug_printf ("%p = NtQueryInformationFile (%S)", status, &upath); - h = NULL; - fileattr = INVALID_FILE_ATTRIBUTES; - - /* One of the inner path components is invalid, or the path contains - invalid characters. Bail out with ENOENT. - - Note that additional STATUS_OBJECT_PATH_INVALID and - STATUS_OBJECT_PATH_SYNTAX_BAD status codes exist. The first one - is seemingly not generated by NtQueryAttributesFile, the latter - is only generated if the path is no absolute path within the - NT name space, which should not happen and would point to an - error in get_nt_native_path. Both status codes are deliberately - not tested here unless proved necessary. */ - if (status == STATUS_OBJECT_PATH_NOT_FOUND - || status == STATUS_OBJECT_NAME_INVALID) - { - set_error (ENOENT); - goto file_not_symlink; - } - if (status != STATUS_OBJECT_NAME_NOT_FOUND - && status != STATUS_NO_SUCH_FILE) /* ENOENT on NFS or 9x share */ - { - /* The file exists, but the user can't access it for one reason - or the other. To get the file attributes we try to access the - information by opening the parent directory and getting the - file attributes using a matching NtQueryDirectoryFile call. */ - UNICODE_STRING dirname, basename; - OBJECT_ATTRIBUTES dattr; - HANDLE dir; - struct { - FILE_DIRECTORY_INFORMATION fdi; - WCHAR dummy_buf[NAME_MAX + 1]; - } fdi_buf; - - RtlSplitUnicodePath (&upath, &dirname, &basename); - InitializeObjectAttributes (&dattr, &dirname, - OBJ_CASE_INSENSITIVE, NULL, NULL); - status = NtOpenFile (&dir, SYNCHRONIZE | FILE_LIST_DIRECTORY, - &dattr, &io, FILE_SHARE_VALID_FLAGS, - FILE_SYNCHRONOUS_IO_NONALERT - | FILE_OPEN_FOR_BACKUP_INTENT - | FILE_DIRECTORY_FILE); - if (!NT_SUCCESS (status)) - { - debug_printf ("%p = NtOpenFile(%S)", status, &dirname); - fileattr = 0; - } - else - { - status = NtQueryDirectoryFile (dir, NULL, NULL, 0, &io, - &fdi_buf, sizeof fdi_buf, - FileDirectoryInformation, - TRUE, &basename, TRUE); - NtClose (dir); - if (!NT_SUCCESS (status)) + if (dev.major == DEV_CYGDRIVE_MAJOR) + { + if (!component) + fileattr = FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_READONLY; + else + { + fileattr = getfileattr (this->path, sym.pflags & MOUNT_ENC); + dev.devn = FH_FS; + } + goto out; + } + else if (dev == FH_DEV) + { + dev.devn = FH_FS; +#if 0 + fileattr = getfileattr (this->path, sym.pflags & MOUNT_ENC); + if (!component && fileattr == INVALID_FILE_ATTRIBUTES) + { + fileattr = FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_READONLY; + goto out; + } +#endif + } + else if (isvirtual_dev (dev.devn)) + { + /* FIXME: Calling build_fhandler here is not the right way to handle this. */ + fhandler_virtual *fh = (fhandler_virtual *) build_fh_dev (dev, path_copy); + int file_type = fh->exists (); + if (file_type == -2) + { + fh->fill_filebuf (); + symlen = sym.set (fh->get_filebuf ()); + } + delete fh; + switch (file_type) + { + case 1: + case 2: + if (component == 0) + fileattr = FILE_ATTRIBUTE_DIRECTORY; + break; + case -1: + if (component == 0) + fileattr = 0; + break; + case -2: /* /proc/self or /proc//symlinks */ + goto is_virtual_symlink; + case -3: /* /proc//fd/pipe:[] */ + if (component == 0) { - debug_printf ("%p = NtQueryDirectoryFile(%S)", - status, &dirname); fileattr = 0; + dev.parse (FH_PIPE); } - else - fileattr = fdi_buf.fdi.FileAttributes; - } - ext_tacked_on = !!*ext_here; - goto file_not_symlink; - } - set_error (ENOENT); - continue; - } + break; + case -4: /* /proc//fd/socket:[] */ + if (component == 0) + { + fileattr = 0; + dev.parse (FH_TCP); + } + break; + default: + if (component == 0) + fileattr = INVALID_FILE_ATTRIBUTES; + goto virtual_component_retry; + } + if (component == 0 || dev.devn != FH_NETDRIVE) + path_flags |= PATH_RO; + goto out; + } + /* devn should not be a device. If it is, then stop parsing now. */ + else if (dev.devn != FH_FS) + { + fileattr = 0; + path_flags = sym.pflags; + if (component) + { + error = ENOTDIR; + return; + } + goto out; /* Found a device. Stop parsing. */ + } - /* Check file system while we're having the file open anyway. - This speeds up path_conv noticably (~10%). */ - fs.update (&upath, h); + /* If path is only a drivename, Windows interprets it as the + current working directory on this drive instead of the root + dir which is what we want. So we need the trailing backslash + in this case. */ + if (full_path[0] && full_path[1] == ':' && full_path[2] == '\0') + { + full_path[2] = '\\'; + full_path[3] = '\0'; + } - ext_tacked_on = !!*ext_here; + symlen = sym.check (full_path, suff, opt, fs); - if (pcheck_case != PCHECK_RELAXED && !case_check (path) - || (opt & PC_SYM_IGNORE)) - goto file_not_symlink; +is_virtual_symlink: - res = -1; + if (sym.isdevice) + { + dev.parse (sym.major, sym.minor); + dev.setfs (1); + dev.mode = sym.mode; + fileattr = sym.fileattr; + goto out; + } - /* Windows shortcuts are potentially treated as symlinks. Valid Cygwin - & U/WIN shortcuts are R/O, but definitely not directories. */ - if ((fileattr & (FILE_ATTRIBUTE_READONLY | FILE_ATTRIBUTE_DIRECTORY)) - == FILE_ATTRIBUTE_READONLY && suffix.lnk_match ()) - { - res = check_shortcut (h); - if (!res) - { - /* If searching for `foo' and then finding a `foo.lnk' which is - no shortcut, return the same as if file not found. */ - if (!suffix.lnk_match () || !ext_tacked_on) - goto file_not_symlink; + if (sym.pflags & PATH_SOCKET) + { + if (component) + { + error = ENOTDIR; + return; + } + fileattr = sym.fileattr; + dev.parse (FH_UNIX); + dev.setfs (1); + goto out; + } - /* in case we're going to tack *another* .lnk on this filename. */ - fileattr = INVALID_FILE_ATTRIBUTES; - continue; - } - if (contents[0] == ':' && contents[1] == '\\' - && parse_device (contents)) - goto file_not_symlink; - } + if (sym.case_clash) + { + if (pcheck_case == PCHECK_STRICT) + { + case_clash = true; + error = ENOENT; + goto out; + } + /* If pcheck_case==PCHECK_ADJUST the case_clash is remembered + if the last component is concerned. This allows functions + which shall create files to avoid overriding already existing + files with another case. */ + if (!component) + case_clash = true; + } + if (!(opt & PC_SYM_IGNORE)) + { + if (!component) + { + fileattr = sym.fileattr; + path_flags = sym.pflags; + } - /* Reparse points are potentially symlinks. This check must be - performed before checking the SYSTEM attribute for sysfile - symlinks, since reparse points can have this flag set, too. - For instance, Vista starts to create a couple of reparse points - with SYSTEM and HIDDEN flags set. */ - else if (fileattr & FILE_ATTRIBUTE_REPARSE_POINT) - { - res = check_reparse_point (h); - if (!res) - goto file_not_symlink; - } + /* If symlink.check found an existing non-symlink file, then + it sets the appropriate flag. It also sets any suffix found + into `ext_here'. */ + if (!sym.issymlink && sym.fileattr != INVALID_FILE_ATTRIBUTES) + { + error = sym.error; + if (component == 0) + add_ext_from_sym (sym); + else if (!(sym.fileattr & FILE_ATTRIBUTE_DIRECTORY)) + { + error = ENOTDIR; + goto out; + } + if (pcheck_case == PCHECK_RELAXED) + goto out; // file found + /* Avoid further symlink evaluation. Only case checks are + done now. */ + opt |= PC_SYM_IGNORE; + } + /* Found a symlink if symlen > 0. If component == 0, then the + src path itself was a symlink. If !follow_mode then + we're done. Otherwise we have to insert the path found + into the full path that we are building and perform all of + these operations again on the newly derived path. */ + else if (symlen > 0) + { + saw_symlinks = 1; + if (component == 0 && !need_directory && !(opt & PC_SYM_FOLLOW)) + { + set_symlink (symlen); // last component of path is a symlink. + if (opt & PC_SYM_CONTENTS) + { + strcpy (path, sym.contents); + goto out; + } + add_ext_from_sym (sym); + if (pcheck_case == PCHECK_RELAXED) + goto out; + /* Avoid further symlink evaluation. Only case checks are + done now. */ + opt |= PC_SYM_IGNORE; + } + else + break; + } + else if (sym.error && sym.error != ENOENT && sym.error != ENOSHARE) + { + error = sym.error; + goto out; + } + /* No existing file found. */ + } - /* This is the old Cygwin method creating symlinks. A symlink will - have the `system' file attribute. Only files can be symlinks - (which can be symlinks to directories). */ - else if ((fileattr & (FILE_ATTRIBUTE_SYSTEM | FILE_ATTRIBUTE_DIRECTORY)) - == FILE_ATTRIBUTE_SYSTEM) - { - res = check_sysfile (h); - if (!res) - goto file_not_symlink; - } +virtual_component_retry: + /* Find the new "tail" of the path, e.g. in '/for/bar/baz', + /baz is the tail. */ + if (tail != path_end) + *tail = '/'; + while (--tail > path_copy + 1 && *tail != '/') {} + /* Exit loop if there is no tail or we are at the + beginning of a UNC path */ + if (tail <= path_copy + 1) + goto out; // all done - /* If the file could be opened with FILE_READ_EA, and if it's on a - NFS share, check if it's a symlink. Only files can be symlinks - (which can be symlinks to directories). */ - else if (!no_ea && !(fileattr & FILE_ATTRIBUTE_DIRECTORY) && fs.is_nfs ()) - { - res = check_nfs_symlink (h); - if (!res) - goto file_not_symlink; - } + /* Haven't found an existing pathname component yet. + Pinch off the tail and try again. */ + *tail = '\0'; + component++; + } - /* Normal file. */ - else - goto file_not_symlink; + /* Arrive here if above loop detected a symlink. */ + if (++loop > SYMLOOP_MAX) + { + error = ELOOP; // Eep. + return; + } + MALLOC_CHECK; + + + /* Place the link content, possibly with head and/or tail, in tmp_buf */ + + char *headptr; + if (isabspath (sym.contents)) + headptr = tmp_buf; /* absolute path */ + else + { + /* Copy the first part of the path (with ending /) and point to the end. */ + char *prevtail = tail; + while (--prevtail > path_copy && *prevtail != '/') {} + int headlen = prevtail - path_copy + 1;; + memcpy (tmp_buf, path_copy, headlen); + headptr = &tmp_buf[headlen]; + } + + /* Make sure there is enough space */ + if (headptr + symlen >= tmp_buf + (2 * NT_MAX_PATH)) + { + too_long: + error = ENAMETOOLONG; + strcpy (path, "::ENAMETOOLONG::"); + return; + } + + /* Copy the symlink contents to the end of tmp_buf. + Convert slashes. */ + for (char *p = sym.contents; *p; p++) + *headptr++ = *p == '\\' ? '/' : *p; + *headptr = '\0'; + + /* Copy any tail component (with the 0) */ + if (tail++ < path_end) + { + /* Add a slash if needed. There is space. */ + if (*(headptr - 1) != '/') + *headptr++ = '/'; + int taillen = path_end - tail + 1; + if (headptr + taillen > tmp_buf + (2 * NT_MAX_PATH)) + goto too_long; + memcpy (headptr, tail, taillen); + } + + /* Evaluate everything all over again. */ + src = tmp_buf; + } + + if (!(opt & PC_SYM_CONTENTS)) + add_ext_from_sym (sym); + +out: + if (dev.devn == FH_NETDRIVE && component) + { + /* This case indicates a non-existant resp. a non-retrievable + share. This happens for instance if the share is a printer. + In this case the path must not be treated like a FH_NETDRIVE, + but like a FH_FS instead, so the usual open call for files + is used on it. */ + dev.parse (FH_FS); + } + else if (isvirtual_dev (dev.devn) && fileattr == INVALID_FILE_ATTRIBUTES) + { + error = dev.devn == FH_NETDRIVE ? ENOSHARE : ENOENT; + return; + } + else if (!need_directory || error) + /* nothing to do */; + else if (fileattr == INVALID_FILE_ATTRIBUTES) + strcat (path, "\\"); /* Reattach trailing dirsep in native path. */ + else if (fileattr & FILE_ATTRIBUTE_DIRECTORY) + path_flags &= ~PATH_SYMLINK; + else + { + debug_printf ("%s is a non-directory", path); + error = ENOTDIR; + return; + } + + if (dev.isfs ()) + { + if (strncmp (path, "\\\\.\\", 4)) + { + if (!tail || tail == path) + /* nothing */; + else if (tail[-1] != '\\') + *tail = '\0'; + else + { + error = ENOENT; + return; + } + } + + /* FS has been checked already for existing files. */ + if (exists () || fs.update (get_nt_native_path (), NULL)) + { + debug_printf ("this->path(%s), has_acls(%d)", path, fs.has_acls ()); + if (fs.has_acls () && allow_ntsec) + set_exec (0); /* We really don't know if this is executable or not here + but set it to not executable since it will be figured out + later by anything which cares about this. */ + } + if (exec_state () != dont_know_if_executable) + /* ok */; + else if (isdir ()) + set_exec (1); + else if (issymlink () || issocket ()) + set_exec (0); + } + + if (opt & PC_NOFULL) + { + if (is_relpath) + mkrelpath (this->path); + if (need_directory) + { + size_t n = strlen (this->path); + /* Do not add trailing \ to UNC device names like \\.\a: */ + if (this->path[n - 1] != '\\' && + (strncmp (this->path, "\\\\.\\", 4) != 0)) + { + this->path[n] = '\\'; + this->path[n + 1] = '\0'; + } + } + } + + if (saw_symlinks) + set_has_symlinks (); + + if (!error && !isdir () && !(path_flags & PATH_ALL_EXEC)) + { + const char *p = strchr (path, '\0') - 4; + if (p >= path && + (ascii_strcasematch (".exe", p) || + ascii_strcasematch (".bat", p) || + ascii_strcasematch (".com", p))) + path_flags |= PATH_EXEC; + } + + if (!(opt & PC_POSIX)) + normalized_path_size = 0; + else + { + if (tail < path_end && tail > path_copy + 1) + *tail = '/'; + set_normalized_path (path_copy); + if (is_msdos && !(opt & PC_NOWARN)) + warn_msdos (src); + } + +#if 0 + if (!error) + { + last_path_conv = *this; + strcpy (last_src, src); + } +#endif +} + +path_conv::~path_conv () +{ + if (!normalized_path_size && normalized_path) + { + cfree (normalized_path); + normalized_path = NULL; + } + if (wide_path) + { + cfree (wide_path); + wide_path = NULL; + } +} + +bool +path_conv::is_binary () +{ + tmp_pathbuf tp; + PWCHAR bintest = tp.w_get (); + DWORD bin; + return exec_state () == is_executable + && RtlEqualUnicodePathSuffix (get_nt_native_path (), L".exe", TRUE) + && GetBinaryTypeW (get_wide_win32_path (bintest), &bin); +} + +/* Normalize a Win32 path. + /'s are converted to \'s in the process. + All duplicate \'s, except for 2 leading \'s, are deleted. + + The result is 0 for success, or an errno error value. + FIXME: A lot of this should be mergeable with the POSIX critter. */ +int +normalize_win32_path (const char *src, char *dst, char *&tail) +{ + const char *src_start = src; + bool beg_src_slash = isdirsep (src[0]); + + tail = dst; + /* Skip long path name prefixes in Win32 or NT syntax. */ + if (beg_src_slash && (src[1] == '?' || isdirsep (src[1])) + && src[2] == '?' && isdirsep (src[3])) + { + src += 4; + if (src[1] != ':') /* native UNC path */ + { + src += 2; /* Fortunately the first char is not copied... */ + beg_src_slash = true; + } + else + beg_src_slash = isdirsep (src[0]); + } + if (beg_src_slash && isdirsep (src[1])) + { + if (isdirsep (src[2])) + { + /* More than two slashes are just folded into one. */ + src += 2; + while (isdirsep (src[1])) + ++src; + } + else + { + /* Two slashes start a network or device path. */ + *tail++ = '\\'; + src++; + if (src[1] == '.' && isdirsep (src[2])) + { + *tail++ = '\\'; + *tail++ = '.'; + src += 2; + } + } + } + if (tail == dst && !isdrive (src) && *src != '/') + { + if (beg_src_slash) + tail += cygheap->cwd.get_drive (dst); + else if (!cygheap->cwd.get (dst, 0)) + return get_errno (); + else + { + tail = strchr (tail, '\0'); + *tail++ = '\\'; + } + } + + while (*src) + { + /* Strip duplicate /'s. */ + if (isdirsep (src[0]) && isdirsep (src[1])) + src++; + /* Ignore "./". */ + else if (src[0] == '.' && isdirsep (src[1]) + && (src == src_start || isdirsep (src[-1]))) + src += 2; + + /* Backup if "..". */ + else if (src[0] == '.' && src[1] == '.' + /* dst must be greater than dst_start */ + && tail[-1] == '\\') + { + if (!isdirsep (src[2]) && src[2] != '\0') + *tail++ = *src++; + else + { + /* Back up over /, but not if it's the first one. */ + if (tail > dst + 1) + tail--; + /* Now back up to the next /. */ + while (tail > dst + 1 && tail[-1] != '\\' && tail[-2] != ':') + tail--; + src += 2; + if (isdirsep (*src)) + src++; + } + } + /* Otherwise, add char to result. */ + else + { + if (*src == '/') + *tail++ = '\\'; + else + *tail++ = *src; + src++; + } + if ((tail - dst) >= NT_MAX_PATH) + return ENAMETOOLONG; + } + if (tail > dst + 1 && tail[-1] == '.' && tail[-2] == '\\') + tail--; + *tail = '\0'; + debug_printf ("%s = normalize_win32_path (%s)", dst, src_start); + return 0; +} + +/* Various utilities. */ + +/* nofinalslash: Remove trailing / and \ from SRC (except for the + first one). It is ok for src == dst. */ + +void __stdcall +nofinalslash (const char *src, char *dst) +{ + int len = strlen (src); + if (src != dst) + memcpy (dst, src, len + 1); + while (len > 1 && isdirsep (dst[--len])) + dst[len] = '\0'; +} + +/* conv_path_list: Convert a list of path names to/from Win32/POSIX. */ + +static int +conv_path_list (const char *src, char *dst, size_t size, int to_posix) +{ + tmp_pathbuf tp; + char src_delim, dst_delim; + cygwin_conv_path_t conv_fn; + size_t len; + + if (to_posix) + { + src_delim = ';'; + dst_delim = ':'; + conv_fn = CCP_WIN_A_TO_POSIX | CCP_RELATIVE; + } + else + { + src_delim = ':'; + dst_delim = ';'; + conv_fn = CCP_POSIX_TO_WIN_A | CCP_RELATIVE; + } + + char *srcbuf; + len = strlen (src) + 1; + if (len <= NT_MAX_PATH * sizeof (WCHAR)) + srcbuf = (char *) tp.w_get (); + else + srcbuf = (char *) alloca (len); + + int err = 0; + char *d = dst - 1; + bool saw_empty = false; + do + { + char *s = strccpy (srcbuf, &src, src_delim); + size_t len = s - srcbuf; + if (len >= NT_MAX_PATH) + { + err = ENAMETOOLONG; + break; + } + if (len) + { + ++d; + err = cygwin_conv_path (conv_fn, srcbuf, d, size - (d - dst)); + } + else if (!to_posix) + { + ++d; + err = cygwin_conv_path (conv_fn, ".", d, size - (d - dst)); + } + else + { + if (to_posix == ENV_CVT) + saw_empty = true; + continue; + } + if (err) break; + d = strchr (d, '\0'); + *d = dst_delim; + } + while (*src++); + if (saw_empty) + err = EIDRM; - file_not_symlink: - issymlink = false; - syscall_printf ("%s", isdevice ? "is a device" : "not a symlink"); - res = 0; - break; - } + if (d < dst) + d++; + *d = '\0'; + return err; +} - if (h) - NtClose (h); +/********************** Symbolic Link Support **************************/ - syscall_printf ("%d = symlink.check (%s, %p) (%p)", - res, suffix.path, contents, pflags); - return res; - } +/* Create a symlink from FROMPATH to TOPATH. */ - /* "path" is the path in a virtual symlink. Set a symlink_info struct from - that and proceed with further path checking afterwards. */ - int - symlink_info::set (char *path) - { - strcpy (contents, path); - pflags = PATH_SYMLINK; - fileattr = FILE_ATTRIBUTE_NORMAL; - error = 0; - issymlink = true; - isdevice = false; - ext_tacked_on = case_clash = false; - ext_here = NULL; - extn = major = minor = mode = 0; - return strlen (path); - } +/* If TRUE create symlinks as Windows shortcuts, if false create symlinks + as normal files with magic number and system bit set. */ +bool allow_winsymlinks = true; - /* Check the correct case of the last path component (given in DOS style). - Adjust the case in this->path if pcheck_case == PCHECK_ADJUST or return - false if pcheck_case == PCHECK_STRICT. - Dont't call if pcheck_case == PCHECK_RELAXED. - */ +extern "C" int +symlink (const char *oldpath, const char *newpath) +{ + return symlink_worker (oldpath, newpath, allow_winsymlinks, false); +} - bool - symlink_info::case_check (char *path) - { - WIN32_FIND_DATA data; - HANDLE h; - char *c; +int +symlink_worker (const char *oldpath, const char *newpath, bool use_winsym, + bool isdevice) +{ + int res = -1; + size_t len; + path_conv win32_newpath, win32_oldpath; + char *buf, *cp; + SECURITY_ATTRIBUTES sa = sec_none_nih; + security_descriptor sd; + OBJECT_ATTRIBUTES attr; + IO_STATUS_BLOCK io; + NTSTATUS status; + HANDLE fh; + FILE_BASIC_INFORMATION fbi; + tmp_pathbuf tp; - /* Set a pointer to the beginning of the last component. */ - if (!(c = strrchr (path, '\\'))) - c = path; - else - ++c; - - if ((h = FindFirstFile (path, &data)) - != INVALID_HANDLE_VALUE) - { - FindClose (h); - - /* If that part of the component exists, check the case. */ - if (strncmp (c, data.cFileName, strlen (data.cFileName))) - { - case_clash = true; - - /* If check is set to STRICT, a wrong case results - in returning a ENOENT. */ - if (pcheck_case == PCHECK_STRICT) - return false; - - /* PCHECK_ADJUST adjusts the case in the incoming - path which points to the path in *this. */ - strcpy (c, data.cFileName); - } - } - return true; - } - - /* readlink system call */ - - extern "C" ssize_t - readlink (const char *path, char *buf, size_t buflen) - { - if (buflen < 0) - { - set_errno (ENAMETOOLONG); - return -1; - } - - path_conv pathbuf (path, PC_SYM_CONTENTS, stat_suffixes); - - if (pathbuf.error) - { - set_errno (pathbuf.error); - syscall_printf ("-1 = readlink (%s, %p, %d)", path, buf, buflen); - return -1; - } - - if (!pathbuf.exists ()) - { - set_errno (ENOENT); - return -1; - } - - if (!pathbuf.issymlink ()) - { - if (pathbuf.exists ()) - set_errno (EINVAL); - return -1; - } - - ssize_t len = min (buflen, strlen (pathbuf.get_win32 ())); - memcpy (buf, pathbuf.get_win32 (), len); - - /* errno set by symlink.check if error */ - return len; - } - - /* Some programs rely on st_dev/st_ino being unique for each file. - Hash the path name and hope for the best. The hash arg is not - always initialized to zero since readdir needs to compute the - dirent ino_t based on a combination of the hash of the directory - done during the opendir call and the hash or the filename within - the directory. FIXME: Not bullet-proof. */ - /* Cygwin internal */ - __ino64_t __stdcall - hash_path_name (__ino64_t hash, PUNICODE_STRING name) - { - if (name->Length == 0) - return hash; - - /* Build up hash. Name is already normalized */ - USHORT len = name->Length / sizeof (WCHAR); - for (USHORT idx = 0; idx < len; ++idx) - hash = RtlUpcaseUnicodeChar (name->Buffer[idx]) - + (hash << 6) + (hash << 16) - hash; - return hash; - } - - __ino64_t __stdcall - hash_path_name (__ino64_t hash, PCWSTR name) - { - UNICODE_STRING uname; - RtlInitUnicodeString (&uname, name); - return hash_path_name (hash, &uname); - } - - __ino64_t __stdcall - hash_path_name (__ino64_t hash, const char *name) - { - UNICODE_STRING uname; - RtlCreateUnicodeStringFromAsciiz (&uname, name); - __ino64_t ret = hash_path_name (hash, &uname); - RtlFreeUnicodeString (&uname); - return ret; - } - - extern "C" char * - getcwd (char *buf, size_t ulen) - { - char* res = NULL; - myfault efault; - if (efault.faulted (EFAULT)) - /* errno set */; - else if (ulen == 0 && buf) - set_errno (EINVAL); - else - res = cygheap->cwd.get (buf, 1, 1, ulen); - return res; - } - - /* getwd: Legacy. */ - extern "C" char * - getwd (char *buf) - { - return getcwd (buf, PATH_MAX + 1); /*Per SuSv3!*/ - } - - /* chdir: POSIX 5.2.1.1 */ - extern "C" int - chdir (const char *in_dir) - { - myfault efault; - if (efault.faulted (EFAULT)) - return -1; - if (!*in_dir) - { - set_errno (ENOENT); - return -1; - } - - syscall_printf ("dir '%s'", in_dir); - - /* Convert path. First argument ensures that we don't check for NULL/empty/invalid - again. */ - path_conv path (PC_NONULLEMPTY, in_dir, PC_SYM_FOLLOW | PC_POSIX); - if (path.error) - { - set_errno (path.error); - syscall_printf ("-1 = chdir (%s)", in_dir); - return -1; - } - - int res = -1; - bool doit = false; - const char *posix_cwd = NULL; - int devn = path.get_devn (); - if (!isvirtual_dev (devn)) - { - /* The sequence chdir("xx"); chdir(".."); must be a noop if xx - is not a symlink. This is exploited by find.exe. - The posix_cwd is just path.normalized_path. - In other cases we let cwd.set obtain the Posix path through - the mount table. */ - if (!isdrive(path.normalized_path)) - posix_cwd = path.normalized_path; - res = 0; - doit = true; - } - else if (!path.exists ()) + /* POSIX says that empty 'newpath' is invalid input while empty + 'oldpath' is valid -- it's symlink resolver job to verify if + symlink contents point to existing filesystem object */ + myfault efault; + if (efault.faulted (EFAULT)) + goto done; + if (!*oldpath || !*newpath) + { set_errno (ENOENT); - else if (!path.isdir ()) - set_errno (ENOTDIR); - else - { - posix_cwd = path.normalized_path; - res = 0; - } + goto done; + } - if (!res) - res = cygheap->cwd.set (path.get_nt_native_path (), posix_cwd, doit); + if (strlen (oldpath) > SYMLINK_MAX) + { + set_errno (ENAMETOOLONG); + goto done; + } - /* Note that we're accessing cwd.posix without a lock here. I didn't think - it was worth locking just for strace. */ - syscall_printf ("%d = chdir() cygheap->cwd.posix '%s' native '%S'", res, - cygheap->cwd.posix, path.get_nt_native_path ()); - MALLOC_CHECK; - return res; - } + len = strlen (newpath); + /* Trailing dirsep is a no-no. */ + if (isdirsep (newpath[len - 1])) + { + set_errno (ENOENT); + goto done; + } + /* We need the normalized full path below. */ + win32_newpath.check (newpath, PC_SYM_NOFOLLOW | PC_POSIX, stat_suffixes); + if (use_winsym && !win32_newpath.exists () + && (isdevice || !win32_newpath.fs_is_nfs ())) + { + char *newplnk = tp.c_get (); + stpcpy (stpcpy (newplnk, newpath), ".lnk"); + win32_newpath.check (newplnk, PC_SYM_NOFOLLOW | PC_POSIX); + } + + if (win32_newpath.error) + { + set_errno (win32_newpath.case_clash ? ECASECLASH : win32_newpath.error); + goto done; + } + + syscall_printf ("symlink (%s, %S)", oldpath, + win32_newpath.get_nt_native_path ()); + + if ((!isdevice && win32_newpath.exists ()) + || win32_newpath.is_auto_device ()) + { + set_errno (EEXIST); + goto done; + } + + if (!isdevice && win32_newpath.fs_is_nfs ()) + { + /* On NFS, create symlinks by calling NtCreateFile with an EA of type + NfsSymlinkTargetName containing ... the symlink target name. */ + PFILE_FULL_EA_INFORMATION pffei = (PFILE_FULL_EA_INFORMATION) tp.w_get (); + pffei->NextEntryOffset = 0; + pffei->Flags = 0; + pffei->EaNameLength = sizeof (NFS_SYML_TARGET) - 1; + char *EaValue = stpcpy (pffei->EaName, NFS_SYML_TARGET) + 1; + pffei->EaValueLength = sizeof (WCHAR) * + (sys_mbstowcs ((PWCHAR) EaValue, NT_MAX_PATH, oldpath) - 1); + status = NtCreateFile (&fh, FILE_WRITE_DATA | FILE_WRITE_EA | SYNCHRONIZE, + win32_newpath.get_object_attr (attr, sa), + &io, NULL, FILE_ATTRIBUTE_SYSTEM, + FILE_SHARE_VALID_FLAGS, FILE_CREATE, + FILE_SYNCHRONOUS_IO_NONALERT + | FILE_OPEN_FOR_BACKUP_INTENT, + pffei, NT_MAX_PATH * sizeof (WCHAR)); + if (!NT_SUCCESS (status)) + { + __seterrno_from_nt_status (status); + goto done; + } + NtClose (fh); + res = 0; + goto done; + } + + if (use_winsym) + { + ITEMIDLIST *pidl = NULL; + size_t full_len = 0; + unsigned short oldpath_len, desc_len, relpath_len, pidl_len = 0; + char desc[MAX_PATH + 1], *relpath; + + if (!isdevice) + { + /* First create an IDLIST to learn how big our shortcut is + going to be. */ + IShellFolder *psl; + + /* The symlink target is relative to the directory in which + the symlink gets created, not relative to the cwd. Therefore + we have to mangle the path quite a bit before calling path_conv. */ + if (!isabspath (oldpath)) + { + len = strrchr (win32_newpath.normalized_path, '/') + - win32_newpath.normalized_path + 1; + char *absoldpath = tp.t_get (); + stpcpy (stpncpy (absoldpath, win32_newpath.normalized_path, len), + oldpath); + win32_oldpath.check (absoldpath, PC_SYM_NOFOLLOW, stat_suffixes); + } + else + win32_oldpath.check (oldpath, PC_SYM_NOFOLLOW, stat_suffixes); + if (SUCCEEDED (SHGetDesktopFolder (&psl))) + { + WCHAR wc_path[win32_oldpath.get_wide_win32_path_len () + 1]; + win32_oldpath.get_wide_win32_path (wc_path); + /* Amazing but true: Even though the ParseDisplayName method + takes a wide char path name, it does not understand the + Win32 prefix for long pathnames! So we have to tack off + the prefix and convert the path to the "normal" syntax + for ParseDisplayName. */ + WCHAR *wc = wc_path + 4; + if (wc[1] != L':') /* native UNC path */ + *(wc += 2) = L'\\'; + HRESULT res; + if (SUCCEEDED (res = psl->ParseDisplayName (NULL, NULL, wc, NULL, + &pidl, NULL))) + { + ITEMIDLIST *p; + + for (p = pidl; p->mkid.cb > 0; + p = (ITEMIDLIST *)((char *) p + p->mkid.cb)) + ; + pidl_len = (char *) p - (char *) pidl + 2; + } + psl->Release (); + } + } + /* Compute size of shortcut file. */ + full_len = sizeof (win_shortcut_hdr); + if (pidl_len) + full_len += sizeof (unsigned short) + pidl_len; + oldpath_len = strlen (oldpath); + /* Unfortunately the length of the description is restricted to a + length of MAX_PATH up to NT4, and to a length of 2000 bytes + since W2K. We don't want to add considerations for the different + lengths and even 2000 bytes is not enough for long path names. + So what we do here is to set the description to the POSIX path + only if the path is not longer than MAX_PATH characters. We + append the full path name after the regular shortcut data + (see below), which works fine with Windows Explorer as well + as older Cygwin versions (as long as the whole file isn't bigger + than 8K). The description field is only used for backward + compatibility to older Cygwin versions and those versions are + not capable of handling long path names anyway. */ + desc_len = stpcpy (desc, oldpath_len > MAX_PATH + ? "[path too long]" : oldpath) - desc; + full_len += sizeof (unsigned short) + desc_len; + /* Devices get the oldpath string unchanged as relative path. */ + if (isdevice) + { + relpath_len = oldpath_len; + stpcpy (relpath = tp.c_get (), oldpath); + } + else + { + relpath_len = strlen (win32_oldpath.get_win32 ()); + stpcpy (relpath = tp.c_get (), win32_oldpath.get_win32 ()); + } + full_len += sizeof (unsigned short) + relpath_len; + full_len += sizeof (unsigned short) + oldpath_len; + /* 1 byte more for trailing 0 written by stpcpy. */ + if (full_len < NT_MAX_PATH * sizeof (WCHAR)) + buf = (char *) tp.w_get (); + else + buf = (char *) alloca (full_len + 1); + + /* Create shortcut header */ + win_shortcut_hdr *shortcut_header = (win_shortcut_hdr *) buf; + memset (shortcut_header, 0, sizeof *shortcut_header); + shortcut_header->size = sizeof *shortcut_header; + shortcut_header->magic = GUID_shortcut; + shortcut_header->flags = (WSH_FLAG_DESC | WSH_FLAG_RELPATH); + if (pidl) + shortcut_header->flags |= WSH_FLAG_IDLIST; + shortcut_header->run = SW_NORMAL; + cp = buf + sizeof (win_shortcut_hdr); + + /* Create IDLIST */ + if (pidl) + { + *(unsigned short *)cp = pidl_len; + memcpy (cp += 2, pidl, pidl_len); + cp += pidl_len; + CoTaskMemFree (pidl); + } + + /* Create description */ + *(unsigned short *)cp = desc_len; + cp = stpcpy (cp += 2, desc); + + /* Create relpath */ + *(unsigned short *)cp = relpath_len; + cp = stpcpy (cp += 2, relpath); + + /* Append the POSIX path after the regular shortcut data for + the long path support. */ + *(unsigned short *)cp = oldpath_len; + cp = stpcpy (cp += 2, oldpath); + } + else + { + /* This is the old technique creating a symlink. */ + buf = tp.c_get (); + /* Note that the terminating nul is written. */ + cp = stpcpy (stpcpy (buf, SYMLINK_COOKIE), oldpath) + 1; + } + + if (isdevice && win32_newpath.exists ()) + { + status = NtOpenFile (&fh, FILE_WRITE_ATTRIBUTES, + win32_newpath.get_object_attr (attr, sa), + &io, 0, FILE_OPEN_FOR_BACKUP_INTENT); + if (!NT_SUCCESS (status)) + { + __seterrno_from_nt_status (status); + goto done; + } + fbi.CreationTime.QuadPart = fbi.LastAccessTime.QuadPart + = fbi.LastWriteTime.QuadPart = fbi.ChangeTime.QuadPart = 0LL; + fbi.FileAttributes = FILE_ATTRIBUTE_NORMAL; + status = NtSetInformationFile (fh, &io, &fbi, sizeof fbi, + FileBasicInformation); + NtClose (fh); + if (!NT_SUCCESS (status)) + { + __seterrno_from_nt_status (status); + goto done; + } + } + if (allow_ntsec && win32_newpath.has_acls ()) + set_security_attribute (S_IFLNK | STD_RBITS | STD_WBITS, + &sa, sd); + status = NtCreateFile (&fh, DELETE | FILE_GENERIC_WRITE, + win32_newpath.get_object_attr (attr, sa), + &io, NULL, FILE_ATTRIBUTE_NORMAL, + FILE_SHARE_VALID_FLAGS, + isdevice ? FILE_OVERWRITE_IF : FILE_CREATE, + FILE_SYNCHRONOUS_IO_NONALERT + | FILE_NON_DIRECTORY_FILE + | FILE_OPEN_FOR_BACKUP_INTENT, + NULL, 0); + if (!NT_SUCCESS (status)) + { + __seterrno_from_nt_status (status); + goto done; + } + status = NtWriteFile (fh, NULL, NULL, NULL, &io, buf, cp - buf, NULL, NULL); + if (NT_SUCCESS (status) && io.Information == (ULONG) (cp - buf)) + { + fbi.CreationTime.QuadPart = fbi.LastAccessTime.QuadPart + = fbi.LastWriteTime.QuadPart = fbi.ChangeTime.QuadPart = 0LL; + fbi.FileAttributes = use_winsym ? FILE_ATTRIBUTE_READONLY + : FILE_ATTRIBUTE_SYSTEM; + status = NtSetInformationFile (fh, &io, &fbi, sizeof fbi, + FileBasicInformation); + if (!NT_SUCCESS (status)) + debug_printf ("Setting attributes failed, status = %p", status); + res = 0; + } + else + { + __seterrno_from_nt_status (status); + FILE_DISPOSITION_INFORMATION fdi = { TRUE }; + status = NtSetInformationFile (fh, &io, &fdi, sizeof fdi, + FileDispositionInformation); + if (!NT_SUCCESS (status)) + debug_printf ("Setting delete dispostion failed, status = %p", status); + } + NtClose (fh); + +done: + syscall_printf ("%d = symlink_worker (%s, %s, %d, %d)", res, oldpath, + newpath, use_winsym, isdevice); + return res; +} + +static bool +cmp_shortcut_header (win_shortcut_hdr *file_header) +{ + /* A Cygwin or U/Win shortcut only contains a description and a relpath. + Cygwin shortcuts also might contain an ITEMIDLIST. The run type is + always set to SW_NORMAL. */ + return file_header->size == sizeof (win_shortcut_hdr) + && !memcmp (&file_header->magic, &GUID_shortcut, sizeof GUID_shortcut) + && (file_header->flags & ~WSH_FLAG_IDLIST) + == (WSH_FLAG_DESC | WSH_FLAG_RELPATH) + && file_header->run == SW_NORMAL; +} + +int +symlink_info::check_shortcut (HANDLE in_h) +{ + tmp_pathbuf tp; + win_shortcut_hdr *file_header; + char *buf, *cp; + unsigned short len; + int res = 0; + UNICODE_STRING same = { 0, 0, (PWCHAR) L"" }; + OBJECT_ATTRIBUTES attr; + NTSTATUS status; + HANDLE h; + IO_STATUS_BLOCK io; + FILE_STANDARD_INFORMATION fsi; + + InitializeObjectAttributes (&attr, &same, 0, in_h, NULL); + status = NtOpenFile (&h, FILE_READ_DATA | SYNCHRONIZE, + &attr, &io, FILE_SHARE_VALID_FLAGS, + FILE_OPEN_FOR_BACKUP_INTENT + | FILE_SYNCHRONOUS_IO_NONALERT); + if (!NT_SUCCESS (status)) + { + set_error (EIO); + return 0; + } + status = NtQueryInformationFile (h, &io, &fsi, sizeof fsi, + FileStandardInformation); + if (!NT_SUCCESS (status)) + { + set_error (EIO); + goto out; + } + if (fsi.EndOfFile.QuadPart <= sizeof (win_shortcut_hdr) + || fsi.EndOfFile.QuadPart > 4 * 65536) + goto out; + if (fsi.EndOfFile.LowPart < NT_MAX_PATH * sizeof (WCHAR)) + buf = (char *) tp.w_get (); + else + buf = (char *) alloca (fsi.EndOfFile.LowPart + 1); + if (!NT_SUCCESS (NtReadFile (h, NULL, NULL, NULL, + &io, buf, fsi.EndOfFile.LowPart, NULL, NULL))) + { + set_error (EIO); + goto out; + } + file_header = (win_shortcut_hdr *) buf; + if (io.Information != fsi.EndOfFile.LowPart + || !cmp_shortcut_header (file_header)) + goto file_not_symlink; + cp = buf + sizeof (win_shortcut_hdr); + if (file_header->flags & WSH_FLAG_IDLIST) /* Skip ITEMIDLIST */ + cp += *(unsigned short *) cp + 2; + if (!(len = *(unsigned short *) cp)) + goto file_not_symlink; + cp += 2; + /* Check if this is a device file - these start with the sequence :\\ */ + if (strncmp (cp, ":\\", 2) == 0) + res = strlen (strcpy (contents, cp)); /* Don't mess with device files */ + else + { + /* Has appended full path? If so, use it instead of description. */ + unsigned short relpath_len = *(unsigned short *) (cp + len); + if (cp + len + 2 + relpath_len < buf + fsi.EndOfFile.LowPart) + { + cp += len + 2 + relpath_len; + len = *(unsigned short *) cp; + cp += 2; + } + if (len > SYMLINK_MAX) + goto file_not_symlink; + cp[len] = '\0'; + res = posixify (cp); + } + if (res) /* It's a symlink. */ + pflags = PATH_SYMLINK | PATH_LNK; + return res; + +file_not_symlink: + /* Not a symlink, see if executable. */ + if (!(pflags & PATH_ALL_EXEC) && has_exec_chars ((const char *) &file_header, io.Information)) + pflags |= PATH_EXEC; + +out: + NtClose (h); + return 0; +} + +int +symlink_info::check_sysfile (HANDLE in_h) +{ + char cookie_buf[sizeof (SYMLINK_COOKIE) - 1]; + char srcbuf[SYMLINK_MAX + 2]; + int res = 0; + UNICODE_STRING same = { 0, 0, (PWCHAR) L"" }; + OBJECT_ATTRIBUTES attr; + NTSTATUS status; + HANDLE h; + IO_STATUS_BLOCK io; + + InitializeObjectAttributes (&attr, &same, 0, in_h, NULL); + status = NtOpenFile (&h, FILE_READ_DATA | SYNCHRONIZE, + &attr, &io, FILE_SHARE_VALID_FLAGS, + FILE_OPEN_FOR_BACKUP_INTENT + | FILE_SYNCHRONOUS_IO_NONALERT); + if (!NT_SUCCESS (status)) + set_error (EIO); + else if (!NT_SUCCESS (status = NtReadFile (h, NULL, NULL, NULL, &io, + cookie_buf, sizeof (cookie_buf), + NULL, NULL))) + { + debug_printf ("ReadFile1 failed"); + if (status != STATUS_END_OF_FILE) + set_error (EIO); + } + else if (io.Information == sizeof (cookie_buf) + && memcmp (cookie_buf, SYMLINK_COOKIE, sizeof (cookie_buf)) == 0) + { + /* It's a symlink. */ + pflags = PATH_SYMLINK; + + status = NtReadFile (h, NULL, NULL, NULL, &io, srcbuf, + SYMLINK_MAX + 2, NULL, NULL); + if (!NT_SUCCESS (status)) + { + debug_printf ("ReadFile2 failed"); + if (status != STATUS_END_OF_FILE) + set_error (EIO); + } + else if (io.Information > SYMLINK_MAX + 1) + debug_printf ("symlink string too long"); + else + res = posixify (srcbuf); + } + else if (io.Information == sizeof (cookie_buf) + && memcmp (cookie_buf, SOCKET_COOKIE, sizeof (cookie_buf)) == 0) + pflags |= PATH_SOCKET; + else + { + /* Not a symlink, see if executable. */ + if (pflags & PATH_ALL_EXEC) + /* Nothing to do */; + else if (has_exec_chars (cookie_buf, io.Information)) + pflags |= PATH_EXEC; + else + pflags |= PATH_NOTEXEC; + } + NtClose (h); + return res; +} + +int +symlink_info::check_reparse_point (HANDLE h) +{ + tmp_pathbuf tp; + NTSTATUS status; + IO_STATUS_BLOCK io; + PREPARSE_DATA_BUFFER rp = (PREPARSE_DATA_BUFFER) tp.c_get (); + char srcbuf[SYMLINK_MAX + 7]; + + status = NtFsControlFile (h, NULL, NULL, NULL, &io, FSCTL_GET_REPARSE_POINT, + NULL, 0, (LPVOID) rp, + MAXIMUM_REPARSE_DATA_BUFFER_SIZE); + if (!NT_SUCCESS (status)) + { + debug_printf ("NtFsControlFile(FSCTL_GET_REPARSE_POINT) failed, %p", + status); + set_error (EIO); + return 0; + } + if (rp->ReparseTag == IO_REPARSE_TAG_SYMLINK) + { + sys_wcstombs (srcbuf, SYMLINK_MAX + 1, + (WCHAR *)((char *)rp->SymbolicLinkReparseBuffer.PathBuffer + + rp->SymbolicLinkReparseBuffer.SubstituteNameOffset), + rp->SymbolicLinkReparseBuffer.SubstituteNameLength / sizeof (WCHAR)); + pflags = PATH_SYMLINK | PATH_REP; + fileattr &= ~FILE_ATTRIBUTE_DIRECTORY; + } + else if (rp->ReparseTag == IO_REPARSE_TAG_MOUNT_POINT) + { + if (rp->SymbolicLinkReparseBuffer.PrintNameLength == 0) + { + /* Likely a volume mount point. Not treated as symlink. */ + return 0; + } + sys_wcstombs (srcbuf, SYMLINK_MAX + 1, + (WCHAR *)((char *)rp->MountPointReparseBuffer.PathBuffer + + rp->MountPointReparseBuffer.SubstituteNameOffset), + rp->MountPointReparseBuffer.SubstituteNameLength / sizeof (WCHAR)); + pflags = PATH_SYMLINK | PATH_REP; + fileattr &= ~FILE_ATTRIBUTE_DIRECTORY; + } + return posixify (srcbuf); +} + +int +symlink_info::check_nfs_symlink (HANDLE h) +{ + tmp_pathbuf tp; + NTSTATUS status; + IO_STATUS_BLOCK io; + struct { + FILE_GET_EA_INFORMATION fgei; + char buf[sizeof (NFS_SYML_TARGET)]; + } fgei_buf; + PFILE_FULL_EA_INFORMATION pffei; + int res = 0; + + /* To find out if the file is a symlink and to get the symlink target, + try to fetch the NfsSymlinkTargetName EA. */ + fgei_buf.fgei.NextEntryOffset = 0; + fgei_buf.fgei.EaNameLength = sizeof (NFS_SYML_TARGET) - 1; + stpcpy (fgei_buf.fgei.EaName, NFS_SYML_TARGET); + pffei = (PFILE_FULL_EA_INFORMATION) tp.w_get (); + status = NtQueryEaFile (h, &io, pffei, NT_MAX_PATH * sizeof (WCHAR), TRUE, + &fgei_buf.fgei, sizeof fgei_buf, NULL, TRUE); + if (NT_SUCCESS (status) && pffei->EaValueLength > 0) + { + PWCHAR spath = (PWCHAR) + (pffei->EaName + pffei->EaNameLength + 1); + res = sys_wcstombs (contents, SYMLINK_MAX + 1, + spath, pffei->EaValueLength); + pflags = PATH_SYMLINK; + } + return res; +} + +int +symlink_info::posixify (char *srcbuf) +{ + /* The definition for a path in a native symlink is a bit weird. The Flags + value seem to contain 0 for absolute paths (stored as NT native path) + and 1 for relative paths. Relative paths are paths not starting with a + drive letter. These are not converted to NT native, but stored as + given. A path starting with a single backslash is relative to the + current drive thus a "relative" value (Flags == 1). + Funny enough it's possible to store paths with slashes instead of + backslashes, but they are evaluated incorrectly by subsequent Windows + calls like CreateFile (ERROR_INVALID_NAME). So, what we do here is to + take paths starting with slashes at face value, evaluating them as + Cygwin specific POSIX paths. + A path starting with two slashes(!) or backslashes is converted into an + NT UNC path. Unfortunately, in contrast to POSIX rules, paths starting + with three or more (back)slashes are also converted into UNC paths, + just incorrectly sticking to one redundant leading backslashe. We go + along with this behaviour to avoid scenarios in which native tools access + other files than Cygwin. + The above rules are used exactly the same way on Cygwin specific symlinks + (sysfiles and shortcuts) to eliminate non-POSIX paths in the output. */ + + /* Eliminate native NT prefixes. */ + if (srcbuf[0] == '\\' && !strncmp (srcbuf + 1, "??\\", 3)) + { + srcbuf += 4; + if (srcbuf[1] != ':') /* native UNC path */ + *(srcbuf += 2) = '\\'; + } + if (isdrive (srcbuf)) + mount_table->conv_to_posix_path (srcbuf, contents, 0); + else if (srcbuf[0] == '\\') + { + if (srcbuf[1] == '\\') /* UNC path */ + slashify (srcbuf, contents, 0); + else /* Paths starting with \ are current drive relative. */ + { + char cvtbuf[SYMLINK_MAX + 1]; + + stpcpy (cvtbuf + cygheap->cwd.get_drive (cvtbuf), srcbuf); + mount_table->conv_to_posix_path (cvtbuf, contents, 0); + } + } + else /* Everything else is taken as is. */ + slashify (srcbuf, contents, 0); + return strlen (contents); +} + +enum +{ + SCAN_BEG, + SCAN_LNK, + SCAN_HASLNK, + SCAN_JUSTCHECK, + SCAN_JUSTCHECKTHIS, /* Never try to append a suffix. */ + SCAN_APPENDLNK, + SCAN_EXTRALNK, + SCAN_DONE, +}; + +class suffix_scan +{ + const suffix_info *suffixes, *suffixes_start; + int nextstate; + char *eopath; +public: + const char *path; + char *has (const char *, const suffix_info *); + int next (); + int lnk_match () {return nextstate >= SCAN_APPENDLNK;} +}; + +char * +suffix_scan::has (const char *in_path, const suffix_info *in_suffixes) +{ + nextstate = SCAN_BEG; + suffixes = suffixes_start = in_suffixes; + + const char *fname = strrchr (in_path, '\\'); + fname = fname ? fname + 1 : in_path; + char *ext_here = strrchr (fname, '.'); + path = in_path; + eopath = strchr (path, '\0'); + + if (!ext_here) + goto noext; + + if (suffixes) + { + /* Check if the extension matches a known extension */ + for (const suffix_info *ex = in_suffixes; ex->name != NULL; ex++) + if (ascii_strcasematch (ext_here, ex->name)) + { + nextstate = SCAN_JUSTCHECK; + suffixes = NULL; /* Has an extension so don't scan for one. */ + goto done; + } + } + + /* Didn't match. Use last resort -- .lnk. */ + if (ascii_strcasematch (ext_here, ".lnk")) + { + nextstate = SCAN_HASLNK; + suffixes = NULL; + } + + noext: + ext_here = eopath; + + done: + /* Avoid attaching suffixes if the resulting filename would be invalid. */ + if (eopath - fname > NAME_MAX - 4) + { + nextstate = SCAN_JUSTCHECKTHIS; + suffixes = NULL; + } + return ext_here; +} + +int +suffix_scan::next () +{ + for (;;) + { + if (!suffixes) + switch (nextstate) + { + case SCAN_BEG: + suffixes = suffixes_start; + if (!suffixes) + { + nextstate = SCAN_LNK; + return 1; + } + nextstate = SCAN_EXTRALNK; + /* fall through to suffix checking below */ + break; + case SCAN_HASLNK: + nextstate = SCAN_APPENDLNK; /* Skip SCAN_BEG */ + return 1; + case SCAN_EXTRALNK: + nextstate = SCAN_DONE; + *eopath = '\0'; + return 0; + case SCAN_JUSTCHECK: + nextstate = SCAN_LNK; + return 1; + case SCAN_JUSTCHECKTHIS: + nextstate = SCAN_DONE; + return 1; + case SCAN_LNK: + case SCAN_APPENDLNK: + strcat (eopath, ".lnk"); + nextstate = SCAN_DONE; + return 1; + default: + *eopath = '\0'; + return 0; + } + + while (suffixes && suffixes->name) + if (nextstate == SCAN_EXTRALNK && !suffixes->addon) + suffixes++; + else + { + strcpy (eopath, suffixes->name); + if (nextstate == SCAN_EXTRALNK) + strcat (eopath, ".lnk"); + suffixes++; + return 1; + } + suffixes = NULL; + } +} + +bool +symlink_info::set_error (int in_errno) +{ + bool res; + if (!(pflags & PATH_NO_ACCESS_CHECK) || in_errno == ENAMETOOLONG || in_errno == EIO) + { + error = in_errno; + res = true; + } + else if (in_errno == ENOENT) + res = true; + else + { + fileattr = FILE_ATTRIBUTE_NORMAL; + res = false; + } + return res; +} + +bool +symlink_info::parse_device (const char *contents) +{ + char *endptr; + _major_t mymajor; + _major_t myminor; + _mode_t mymode; + + mymajor = strtol (contents += 2, &endptr, 16); + if (endptr == contents) + return isdevice = false; + + contents = endptr; + myminor = strtol (++contents, &endptr, 16); + if (endptr == contents) + return isdevice = false; + + contents = endptr; + mymode = strtol (++contents, &endptr, 16); + if (endptr == contents) + return isdevice = false; + + if ((mymode & S_IFMT) == S_IFIFO) + { + mymajor = _major (FH_FIFO); + myminor = _minor (FH_FIFO); + } + + major = mymajor; + minor = myminor; + mode = mymode; + return isdevice = true; +} + +/* Check if PATH is a symlink. PATH must be a valid Win32 path name. + + If PATH is a symlink, put the value of the symlink--the file to + which it points--into BUF. The value stored in BUF is not + necessarily null terminated. BUFLEN is the length of BUF; only up + to BUFLEN characters will be stored in BUF. BUF may be NULL, in + which case nothing will be stored. + + Set *SYML if PATH is a symlink. + + Set *EXEC if PATH appears to be executable. This is an efficiency + hack because we sometimes have to open the file anyhow. *EXEC will + not be set for every executable file. + + Return -1 on error, 0 if PATH is not a symlink, or the length + stored into BUF if PATH is a symlink. */ + +int +symlink_info::check (char *path, const suffix_info *suffixes, unsigned opt, + fs_info &fs) +{ + HANDLE h = NULL; + int res = 0; + suffix_scan suffix; + contents[0] = '\0'; + + issymlink = true; + isdevice = false; + ext_here = suffix.has (path, suffixes); + extn = ext_here - path; + major = 0; + minor = 0; + mode = 0; + pflags &= ~(PATH_SYMLINK | PATH_LNK | PATH_REP); + case_clash = false; + + /* TODO: Temporarily do all char->UNICODE conversion here. This should + already be slightly faster than using Ascii functions. */ + tmp_pathbuf tp; + UNICODE_STRING upath; + OBJECT_ATTRIBUTES attr; + tp.u_get (&upath); + InitializeObjectAttributes (&attr, &upath, OBJ_CASE_INSENSITIVE, NULL, NULL); + + void *eabuf = &nfs_aol_ffei; + ULONG easize = sizeof nfs_aol_ffei; + + while (suffix.next ()) + { + FILE_BASIC_INFORMATION fbi; + NTSTATUS status; + IO_STATUS_BLOCK io; + bool no_ea = false; + + error = 0; + get_nt_native_path (suffix.path, upath, pflags & MOUNT_ENC); + if (h) + { + NtClose (h); + h = NULL; + } + /* The EA given to NtCreateFile allows to get a handle to a symlink on + an NFS share, rather than getting a handle to the target of the + symlink (which would spoil the task of this method quite a bit). + Fortunately it's ignored on most other file systems so we don't have + to special case NFS too much. */ + status = NtCreateFile (&h, + READ_CONTROL | FILE_READ_ATTRIBUTES | FILE_READ_EA, + &attr, &io, NULL, FILE_ATTRIBUTE_NORMAL, + FILE_SHARE_VALID_FLAGS, FILE_OPEN, + FILE_OPEN_REPARSE_POINT + | FILE_OPEN_FOR_BACKUP_INTENT, + eabuf, easize); + /* No right to access EAs or EAs not supported? */ + if (status == STATUS_ACCESS_DENIED || status == STATUS_EAS_NOT_SUPPORTED) + { + no_ea = true; + /* If EAs are not supported, there's no sense to check them again + whith suffixes attached. So we set eabuf/easize to 0 here once. */ + if (status == STATUS_EAS_NOT_SUPPORTED) + { + eabuf = NULL; + easize = 0; + } + status = NtCreateFile (&h, + READ_CONTROL | FILE_READ_ATTRIBUTES, + &attr, &io, NULL, FILE_ATTRIBUTE_NORMAL, + FILE_SHARE_VALID_FLAGS, FILE_OPEN, + FILE_OPEN_REPARSE_POINT + | FILE_OPEN_FOR_BACKUP_INTENT, + eabuf, easize); + } + if (NT_SUCCESS (status) + && NT_SUCCESS (status + = NtQueryInformationFile (h, &io, &fbi, sizeof fbi, + FileBasicInformation))) + fileattr = fbi.FileAttributes; + else + { + debug_printf ("%p = NtQueryInformationFile (%S)", status, &upath); + h = NULL; + fileattr = INVALID_FILE_ATTRIBUTES; + + /* One of the inner path components is invalid, or the path contains + invalid characters. Bail out with ENOENT. + + Note that additional STATUS_OBJECT_PATH_INVALID and + STATUS_OBJECT_PATH_SYNTAX_BAD status codes exist. The first one + is seemingly not generated by NtQueryAttributesFile, the latter + is only generated if the path is no absolute path within the + NT name space, which should not happen and would point to an + error in get_nt_native_path. Both status codes are deliberately + not tested here unless proved necessary. */ + if (status == STATUS_OBJECT_PATH_NOT_FOUND + || status == STATUS_OBJECT_NAME_INVALID) + { + set_error (ENOENT); + goto file_not_symlink; + } + if (status != STATUS_OBJECT_NAME_NOT_FOUND + && status != STATUS_NO_SUCH_FILE) /* ENOENT on NFS or 9x share */ + { + /* The file exists, but the user can't access it for one reason + or the other. To get the file attributes we try to access the + information by opening the parent directory and getting the + file attributes using a matching NtQueryDirectoryFile call. */ + UNICODE_STRING dirname, basename; + OBJECT_ATTRIBUTES dattr; + HANDLE dir; + struct { + FILE_DIRECTORY_INFORMATION fdi; + WCHAR dummy_buf[NAME_MAX + 1]; + } fdi_buf; + + RtlSplitUnicodePath (&upath, &dirname, &basename); + InitializeObjectAttributes (&dattr, &dirname, + OBJ_CASE_INSENSITIVE, NULL, NULL); + status = NtOpenFile (&dir, SYNCHRONIZE | FILE_LIST_DIRECTORY, + &dattr, &io, FILE_SHARE_VALID_FLAGS, + FILE_SYNCHRONOUS_IO_NONALERT + | FILE_OPEN_FOR_BACKUP_INTENT + | FILE_DIRECTORY_FILE); + if (!NT_SUCCESS (status)) + { + debug_printf ("%p = NtOpenFile(%S)", status, &dirname); + fileattr = 0; + } + else + { + status = NtQueryDirectoryFile (dir, NULL, NULL, 0, &io, + &fdi_buf, sizeof fdi_buf, + FileDirectoryInformation, + TRUE, &basename, TRUE); + NtClose (dir); + if (!NT_SUCCESS (status)) + { + debug_printf ("%p = NtQueryDirectoryFile(%S)", + status, &dirname); + fileattr = 0; + } + else + fileattr = fdi_buf.fdi.FileAttributes; + } + ext_tacked_on = !!*ext_here; + goto file_not_symlink; + } + set_error (ENOENT); + continue; + } + + /* Check file system while we're having the file open anyway. + This speeds up path_conv noticably (~10%). */ + fs.update (&upath, h); + + ext_tacked_on = !!*ext_here; + + if (pcheck_case != PCHECK_RELAXED && !case_check (path) + || (opt & PC_SYM_IGNORE)) + goto file_not_symlink; - extern "C" int - fchdir (int fd) - { - int res; - cygheap_fdget cfd (fd); - if (cfd >= 0) - res = chdir (cfd->get_name ()); - else res = -1; - syscall_printf ("%d = fchdir (%d)", res, fd); - return res; - } + /* Windows shortcuts are potentially treated as symlinks. Valid Cygwin + & U/WIN shortcuts are R/O, but definitely not directories. */ + if ((fileattr & (FILE_ATTRIBUTE_READONLY | FILE_ATTRIBUTE_DIRECTORY)) + == FILE_ATTRIBUTE_READONLY && suffix.lnk_match ()) + { + res = check_shortcut (h); + if (!res) + { + /* If searching for `foo' and then finding a `foo.lnk' which is + no shortcut, return the same as if file not found. */ + if (!suffix.lnk_match () || !ext_tacked_on) + goto file_not_symlink; - /******************** Exported Path Routines *********************/ + /* in case we're going to tack *another* .lnk on this filename. */ + fileattr = INVALID_FILE_ATTRIBUTES; + continue; + } + if (contents[0] == ':' && contents[1] == '\\' + && parse_device (contents)) + goto file_not_symlink; + } - /* Cover functions to the path conversion routines. - These are exported to the world as cygwin_foo by cygwin.din. */ + /* Reparse points are potentially symlinks. This check must be + performed before checking the SYSTEM attribute for sysfile + symlinks, since reparse points can have this flag set, too. + For instance, Vista starts to create a couple of reparse points + with SYSTEM and HIDDEN flags set. */ + else if (fileattr & FILE_ATTRIBUTE_REPARSE_POINT) + { + res = check_reparse_point (h); + if (!res) + goto file_not_symlink; + } + + /* This is the old Cygwin method creating symlinks. A symlink will + have the `system' file attribute. Only files can be symlinks + (which can be symlinks to directories). */ + else if ((fileattr & (FILE_ATTRIBUTE_SYSTEM | FILE_ATTRIBUTE_DIRECTORY)) + == FILE_ATTRIBUTE_SYSTEM) + { + res = check_sysfile (h); + if (!res) + goto file_not_symlink; + } + + /* If the file could be opened with FILE_READ_EA, and if it's on a + NFS share, check if it's a symlink. Only files can be symlinks + (which can be symlinks to directories). */ + else if (!eabuf && !(fileattr & FILE_ATTRIBUTE_DIRECTORY) && fs.is_nfs ()) + { + res = check_nfs_symlink (h); + if (!res) + goto file_not_symlink; + } + + /* Normal file. */ + else + goto file_not_symlink; + + break; + + + file_not_symlink: + issymlink = false; + syscall_printf ("%s", isdevice ? "is a device" : "not a symlink"); + res = 0; + break; + } + + if (h) + NtClose (h); + + syscall_printf ("%d = symlink.check (%s, %p) (%p)", + res, suffix.path, contents, pflags); + return res; +} + +/* "path" is the path in a virtual symlink. Set a symlink_info struct from + that and proceed with further path checking afterwards. */ +int +symlink_info::set (char *path) +{ + strcpy (contents, path); + pflags = PATH_SYMLINK; + fileattr = FILE_ATTRIBUTE_NORMAL; + error = 0; + issymlink = true; + isdevice = false; + ext_tacked_on = case_clash = false; + ext_here = NULL; + extn = major = minor = mode = 0; + return strlen (path); +} + +/* Check the correct case of the last path component (given in DOS style). + Adjust the case in this->path if pcheck_case == PCHECK_ADJUST or return + false if pcheck_case == PCHECK_STRICT. + Dont't call if pcheck_case == PCHECK_RELAXED. +*/ + +bool +symlink_info::case_check (char *path) +{ + WIN32_FIND_DATA data; + HANDLE h; + char *c; + + /* Set a pointer to the beginning of the last component. */ + if (!(c = strrchr (path, '\\'))) + c = path; + else + ++c; + + if ((h = FindFirstFile (path, &data)) + != INVALID_HANDLE_VALUE) + { + FindClose (h); + + /* If that part of the component exists, check the case. */ + if (strncmp (c, data.cFileName, strlen (data.cFileName))) + { + case_clash = true; + + /* If check is set to STRICT, a wrong case results + in returning a ENOENT. */ + if (pcheck_case == PCHECK_STRICT) + return false; + + /* PCHECK_ADJUST adjusts the case in the incoming + path which points to the path in *this. */ + strcpy (c, data.cFileName); + } + } + return true; +} + +/* readlink system call */ + +extern "C" ssize_t +readlink (const char *path, char *buf, size_t buflen) +{ + if (buflen < 0) + { + set_errno (ENAMETOOLONG); + return -1; + } + + path_conv pathbuf (path, PC_SYM_CONTENTS, stat_suffixes); + + if (pathbuf.error) + { + set_errno (pathbuf.error); + syscall_printf ("-1 = readlink (%s, %p, %d)", path, buf, buflen); + return -1; + } + + if (!pathbuf.exists ()) + { + set_errno (ENOENT); + return -1; + } + + if (!pathbuf.issymlink ()) + { + if (pathbuf.exists ()) + set_errno (EINVAL); + return -1; + } + + ssize_t len = min (buflen, strlen (pathbuf.get_win32 ())); + memcpy (buf, pathbuf.get_win32 (), len); + + /* errno set by symlink.check if error */ + return len; +} + +/* Some programs rely on st_dev/st_ino being unique for each file. + Hash the path name and hope for the best. The hash arg is not + always initialized to zero since readdir needs to compute the + dirent ino_t based on a combination of the hash of the directory + done during the opendir call and the hash or the filename within + the directory. FIXME: Not bullet-proof. */ +/* Cygwin internal */ +__ino64_t __stdcall +hash_path_name (__ino64_t hash, PUNICODE_STRING name) +{ + if (name->Length == 0) + return hash; + + /* Build up hash. Name is already normalized */ + USHORT len = name->Length / sizeof (WCHAR); + for (USHORT idx = 0; idx < len; ++idx) + hash = RtlUpcaseUnicodeChar (name->Buffer[idx]) + + (hash << 6) + (hash << 16) - hash; + return hash; +} + +__ino64_t __stdcall +hash_path_name (__ino64_t hash, PCWSTR name) +{ + UNICODE_STRING uname; + RtlInitUnicodeString (&uname, name); + return hash_path_name (hash, &uname); +} + +__ino64_t __stdcall +hash_path_name (__ino64_t hash, const char *name) +{ + UNICODE_STRING uname; + RtlCreateUnicodeStringFromAsciiz (&uname, name); + __ino64_t ret = hash_path_name (hash, &uname); + RtlFreeUnicodeString (&uname); + return ret; +} + +extern "C" char * +getcwd (char *buf, size_t ulen) +{ + char* res = NULL; + myfault efault; + if (efault.faulted (EFAULT)) + /* errno set */; + else if (ulen == 0 && buf) + set_errno (EINVAL); + else + res = cygheap->cwd.get (buf, 1, 1, ulen); + return res; +} + +/* getwd: Legacy. */ +extern "C" char * +getwd (char *buf) +{ + return getcwd (buf, PATH_MAX + 1); /*Per SuSv3!*/ +} + +/* chdir: POSIX 5.2.1.1 */ +extern "C" int +chdir (const char *in_dir) +{ + myfault efault; + if (efault.faulted (EFAULT)) + return -1; + if (!*in_dir) + { + set_errno (ENOENT); + return -1; + } + + syscall_printf ("dir '%s'", in_dir); + + /* Convert path. First argument ensures that we don't check for NULL/empty/invalid + again. */ + path_conv path (PC_NONULLEMPTY, in_dir, PC_SYM_FOLLOW | PC_POSIX); + if (path.error) + { + set_errno (path.error); + syscall_printf ("-1 = chdir (%s)", in_dir); + return -1; + } + + int res = -1; + bool doit = false; + const char *posix_cwd = NULL; + int devn = path.get_devn (); + if (!isvirtual_dev (devn)) + { + /* The sequence chdir("xx"); chdir(".."); must be a noop if xx + is not a symlink. This is exploited by find.exe. + The posix_cwd is just path.normalized_path. + In other cases we let cwd.set obtain the Posix path through + the mount table. */ + if (!isdrive(path.normalized_path)) + posix_cwd = path.normalized_path; + res = 0; + doit = true; + } + else if (!path.exists ()) + set_errno (ENOENT); + else if (!path.isdir ()) + set_errno (ENOTDIR); + else + { + posix_cwd = path.normalized_path; + res = 0; + } + + if (!res) + res = cygheap->cwd.set (path.get_nt_native_path (), posix_cwd, doit); + + /* Note that we're accessing cwd.posix without a lock here. I didn't think + it was worth locking just for strace. */ + syscall_printf ("%d = chdir() cygheap->cwd.posix '%s' native '%S'", res, + cygheap->cwd.posix, path.get_nt_native_path ()); + MALLOC_CHECK; + return res; +} + +extern "C" int +fchdir (int fd) +{ + int res; + cygheap_fdget cfd (fd); + if (cfd >= 0) + res = chdir (cfd->get_name ()); + else + res = -1; + + syscall_printf ("%d = fchdir (%d)", res, fd); + return res; +} + +/******************** Exported Path Routines *********************/ + +/* Cover functions to the path conversion routines. + These are exported to the world as cygwin_foo by cygwin.din. */ #define return_with_errno(x) \ - do {\ - int err = (x);\ - if (!err)\ - return 0;\ - set_errno (err);\ - return -1;\ - } while (0) + do {\ + int err = (x);\ + if (!err)\ + return 0;\ + set_errno (err);\ + return -1;\ + } while (0) - extern "C" ssize_t - cygwin_conv_path (cygwin_conv_path_t what, const void *from, void *to, - size_t size) - { - tmp_pathbuf tp; - myfault efault; - if (efault.faulted (EFAULT)) - return -1; - - path_conv p; - size_t lsiz = 0; - char *buf = NULL; - int error = 0; - bool relative = !!(what & CCP_RELATIVE); - what &= ~CCP_RELATIVE; - - switch (what) - { - case CCP_POSIX_TO_WIN_A: - p.check ((const char *) from, - PC_POSIX | PC_SYM_FOLLOW | PC_NO_ACCESS_CHECK | PC_NOWARN - | (relative ? PC_NOFULL : 0)); - if (p.error) - return_with_errno (p.error); - PUNICODE_STRING up = p.get_nt_native_path (); - buf = tp.c_get (); - sys_wcstombs (buf, NT_MAX_PATH, up->Buffer, up->Length / sizeof (WCHAR)); - buf += 4; /* Skip \??\ */ - if (buf[1] != ':') /* native UNC path */ - *(buf += 2) = '\\'; - lsiz = strlen (buf) + 1; - break; - case CCP_POSIX_TO_WIN_W: - p.check ((const char *) from, - PC_POSIX | PC_SYM_FOLLOW | PC_NO_ACCESS_CHECK | PC_NOWARN - | (relative ? PC_NOFULL : 0)); - if (p.error) - return_with_errno (p.error); - lsiz = (p.get_wide_win32_path_len () + 1) * sizeof (WCHAR); - break; - case CCP_WIN_A_TO_POSIX: - buf = tp.c_get (); - error = mount_table->conv_to_posix_path ((const char *) from, buf, - relative); - if (error) - return_with_errno (error); - lsiz = strlen (buf) + 1; - break; - case CCP_WIN_W_TO_POSIX: - buf = tp.c_get (); - error = mount_table->conv_to_posix_path ((const PWCHAR) from, buf, - relative); - if (error) - return_with_errno (error); - lsiz = strlen (buf) + 1; - break; - default: - set_errno (EINVAL); - return -1; - } - if (!size) - return lsiz; - if (size < lsiz) - { - set_errno (ENOSPC); - return -1; - } - switch (what) - { - case CCP_POSIX_TO_WIN_A: - case CCP_WIN_A_TO_POSIX: - case CCP_WIN_W_TO_POSIX: - strcpy ((char *) to, buf); - break; - case CCP_POSIX_TO_WIN_W: - p.get_wide_win32_path ((PWCHAR) to); - break; - } - return 0; - } - - extern "C" void * - cygwin_create_path (cygwin_conv_path_t what, const void *from) - { - void *to; - ssize_t size = cygwin_conv_path (what, from, NULL, 0); - if (size <= 0) - return NULL; - if (!(to = malloc (size))) - return NULL; - if (cygwin_conv_path (what, from, to, size) == -1) - return NULL; - return to; - } - - - extern "C" int - cygwin_conv_to_win32_path (const char *path, char *win32_path) - { - return cygwin_conv_path (CCP_POSIX_TO_WIN_A | CCP_RELATIVE, path, win32_path, - MAX_PATH); - } - - extern "C" int - cygwin_conv_to_full_win32_path (const char *path, char *win32_path) - { - return cygwin_conv_path (CCP_POSIX_TO_WIN_A | CCP_ABSOLUTE, path, win32_path, - MAX_PATH); - } - - /* This is exported to the world as cygwin_foo by cygwin.din. */ - - extern "C" int - cygwin_conv_to_posix_path (const char *path, char *posix_path) - { - return cygwin_conv_path (CCP_WIN_A_TO_POSIX | CCP_RELATIVE, path, posix_path, - MAX_PATH); - } - - extern "C" int - cygwin_conv_to_full_posix_path (const char *path, char *posix_path) - { - return cygwin_conv_path (CCP_WIN_A_TO_POSIX | CCP_ABSOLUTE, path, posix_path, - MAX_PATH); - } - - /* The realpath function is supported on some UNIX systems. */ - - extern "C" char * - realpath (const char *path, char *resolved) - { - /* Make sure the right errno is returned if path is NULL. */ - if (!path) - { - set_errno (EINVAL); - return NULL; - } - - /* Guard reading from a potentially invalid path and writing to a - potentially invalid resolved. */ - tmp_pathbuf tp; - myfault efault; - if (efault.faulted (EFAULT)) - return NULL; - - char *tpath; - if (isdrive (path)) - { - tpath = tp.c_get (); - mount_table->cygdrive_posix_path (path, tpath, 0); - } - else - tpath = (char *) path; - - path_conv real_path (tpath, PC_SYM_FOLLOW | PC_POSIX, stat_suffixes); - - - /* Linux has this funny non-standard extension. If "resolved" is NULL, - realpath mallocs the space by itself and returns it to the application. - The application is responsible for calling free() then. This extension - is backed by POSIX, which allows implementation-defined behaviour if - "resolved" is NULL. That's good enough for us to do the same here. */ - - if (!real_path.error && real_path.exists ()) - { - if (!resolved) - { - resolved = (char *) malloc (strlen (real_path.normalized_path) + 1); - if (!resolved) - return NULL; - } - strcpy (resolved, real_path.normalized_path); - return resolved; - } - - /* FIXME: on error, we are supposed to put the name of the path - component which could not be resolved into RESOLVED. */ - if (resolved) - resolved[0] = '\0'; - set_errno (real_path.error ?: ENOENT); - return NULL; - } - - /* Return non-zero if path is a POSIX path list. - This is exported to the world as cygwin_foo by cygwin.din. - - DOCTOOL-START - - Rather than use a mode to say what the "proper" path list - format is, we allow any, and give apps the tools they need to - convert between the two. If a ';' is present in the path list it's - a Win32 path list. Otherwise, if the first path begins with - [letter]: (in which case it can be the only element since if it - wasn't a ';' would be present) it's a Win32 path list. Otherwise, - it's a POSIX path list. - - DOCTOOL-END - */ - - extern "C" int - cygwin_posix_path_list_p (const char *path) - { - int posix_p = !(strchr (path, ';') || isdrive (path)); - return posix_p; - } - - /* These are used for apps that need to convert env vars like PATH back and - forth. The conversion is a two step process. First, an upper bound on the - size of the buffer needed is computed. Then the conversion is done. This - allows the caller to use alloca if it wants. */ - - static int - conv_path_list_buf_size (const char *path_list, bool to_posix) - { - int i, num_elms, max_mount_path_len, size; - const char *p; - - path_conv pc(".", PC_POSIX); - /* The theory is that an upper bound is - current_size + (num_elms * max_mount_path_len) */ - /* FIXME: This method is questionable in the long run. */ - - unsigned nrel; - char delim = to_posix ? ';' : ':'; - for (p = path_list, num_elms = nrel = 0; p; num_elms++) - { - if (!isabspath (p)) - nrel++; - p = strchr (++p, delim); - } - - /* 7: strlen ("//c") + slop, a conservative initial value */ - for (max_mount_path_len = sizeof ("/cygdrive/X"), i = 0; - i < mount_table->nmounts; i++) - { - int mount_len = (to_posix - ? mount_table->mount[i].posix_pathlen - : mount_table->mount[i].native_pathlen); - if (max_mount_path_len < mount_len) - max_mount_path_len = mount_len; - } - - /* 100: slop */ - size = strlen (path_list) - + (num_elms * max_mount_path_len) - + (nrel * strlen (to_posix ? pc.normalized_path : pc.get_win32 ())) - + 100; - - return size; - } - - - extern "C" int - cygwin_win32_to_posix_path_list_buf_size (const char *path_list) - { - return conv_path_list_buf_size (path_list, true); - } - - extern "C" int - cygwin_posix_to_win32_path_list_buf_size (const char *path_list) - { - return conv_path_list_buf_size (path_list, false); - } - - extern "C" ssize_t - env_PATH_to_posix (const void *win32, void *posix, size_t size) - { - return_with_errno (conv_path_list ((const char *) win32, (char *) posix, - size, ENV_CVT)); - } - - extern "C" int - cygwin_win32_to_posix_path_list (const char *win32, char *posix) - { - return_with_errno (conv_path_list (win32, posix, MAX_PATH, 1)); - } - - extern "C" int - cygwin_posix_to_win32_path_list (const char *posix, char *win32) - { - return_with_errno (conv_path_list (posix, win32, MAX_PATH, 0)); - } - - extern "C" ssize_t - cygwin_conv_path_list (cygwin_conv_path_t what, const void *from, void *to, - size_t size) - { - /* FIXME: Path lists are (so far) always retaining relative paths. */ - what &= ~CCP_RELATIVE; - switch (what) - { - case CCP_WIN_W_TO_POSIX: - case CCP_POSIX_TO_WIN_W: - /*FIXME*/ - api_fatal ("wide char path lists not yet supported"); - break; - case CCP_WIN_A_TO_POSIX: - case CCP_POSIX_TO_WIN_A: - if (size == 0) - return conv_path_list_buf_size ((const char *) from, - what == CCP_WIN_A_TO_POSIX); - return_with_errno (conv_path_list ((const char *) from, (char *) to, - size, what == CCP_WIN_A_TO_POSIX)); - break; - default: - break; - } - set_errno (EINVAL); +extern "C" ssize_t +cygwin_conv_path (cygwin_conv_path_t what, const void *from, void *to, + size_t size) +{ + tmp_pathbuf tp; + myfault efault; + if (efault.faulted (EFAULT)) return -1; - } - /* cygwin_split_path: Split a path into directory and file name parts. - Buffers DIR and FILE are assumed to be big enough. + path_conv p; + size_t lsiz = 0; + char *buf = NULL; + int error = 0; + bool relative = !!(what & CCP_RELATIVE); + what &= ~CCP_RELATIVE; - Examples (path -> `dir' / `file'): - / -> `/' / `' - "" -> `.' / `' - . -> `.' / `.' (FIXME: should this be `.' / `'?) - .. -> `.' / `..' (FIXME: should this be `..' / `'?) - foo -> `.' / `foo' - foo/bar -> `foo' / `bar' - foo/bar/ -> `foo' / `bar' - /foo -> `/' / `foo' - /foo/bar -> `/foo' / `bar' - c: -> `c:/' / `' - c:/ -> `c:/' / `' - c:foo -> `c:/' / `foo' - c:/foo -> `c:/' / `foo' - */ + switch (what) + { + case CCP_POSIX_TO_WIN_A: + p.check ((const char *) from, + PC_POSIX | PC_SYM_FOLLOW | PC_NO_ACCESS_CHECK | PC_NOWARN + | (relative ? PC_NOFULL : 0)); + if (p.error) + return_with_errno (p.error); + PUNICODE_STRING up = p.get_nt_native_path (); + buf = tp.c_get (); + sys_wcstombs (buf, NT_MAX_PATH, up->Buffer, up->Length / sizeof (WCHAR)); + buf += 4; /* Skip \??\ */ + if (buf[1] != ':') /* native UNC path */ + *(buf += 2) = '\\'; + lsiz = strlen (buf) + 1; + break; + case CCP_POSIX_TO_WIN_W: + p.check ((const char *) from, + PC_POSIX | PC_SYM_FOLLOW | PC_NO_ACCESS_CHECK | PC_NOWARN + | (relative ? PC_NOFULL : 0)); + if (p.error) + return_with_errno (p.error); + lsiz = (p.get_wide_win32_path_len () + 1) * sizeof (WCHAR); + break; + case CCP_WIN_A_TO_POSIX: + buf = tp.c_get (); + error = mount_table->conv_to_posix_path ((const char *) from, buf, + relative); + if (error) + return_with_errno (error); + lsiz = strlen (buf) + 1; + break; + case CCP_WIN_W_TO_POSIX: + buf = tp.c_get (); + error = mount_table->conv_to_posix_path ((const PWCHAR) from, buf, + relative); + if (error) + return_with_errno (error); + lsiz = strlen (buf) + 1; + break; + default: + set_errno (EINVAL); + return -1; + } + if (!size) + return lsiz; + if (size < lsiz) + { + set_errno (ENOSPC); + return -1; + } + switch (what) + { + case CCP_POSIX_TO_WIN_A: + case CCP_WIN_A_TO_POSIX: + case CCP_WIN_W_TO_POSIX: + strcpy ((char *) to, buf); + break; + case CCP_POSIX_TO_WIN_W: + p.get_wide_win32_path ((PWCHAR) to); + break; + } + return 0; +} - extern "C" void - cygwin_split_path (const char *path, char *dir, char *file) - { - int dir_started_p = 0; +extern "C" void * +cygwin_create_path (cygwin_conv_path_t what, const void *from) +{ + void *to; + ssize_t size = cygwin_conv_path (what, from, NULL, 0); + if (size <= 0) + return NULL; + if (!(to = malloc (size))) + return NULL; + if (cygwin_conv_path (what, from, to, size) == -1) + return NULL; + return to; +} - /* Deal with drives. - Remember that c:foo <==> c:/foo. */ - if (isdrive (path)) - { - *dir++ = *path++; - *dir++ = *path++; - *dir++ = '/'; - if (!*path) - { - *dir = 0; - *file = 0; - return; - } - if (isdirsep (*path)) - ++path; - dir_started_p = 1; - } - /* Determine if there are trailing slashes and "delete" them if present. - We pretend as if they don't exist. */ - const char *end = path + strlen (path); - /* path + 1: keep leading slash. */ - while (end > path + 1 && isdirsep (end[-1])) - --end; +extern "C" int +cygwin_conv_to_win32_path (const char *path, char *win32_path) +{ + return cygwin_conv_path (CCP_POSIX_TO_WIN_A | CCP_RELATIVE, path, win32_path, + MAX_PATH); +} - /* At this point, END points to one beyond the last character - (with trailing slashes "deleted"). */ +extern "C" int +cygwin_conv_to_full_win32_path (const char *path, char *win32_path) +{ + return cygwin_conv_path (CCP_POSIX_TO_WIN_A | CCP_ABSOLUTE, path, win32_path, + MAX_PATH); +} - /* Point LAST_SLASH at the last slash (duh...). */ - const char *last_slash; - for (last_slash = end - 1; last_slash >= path; --last_slash) - if (isdirsep (*last_slash)) - break; +/* This is exported to the world as cygwin_foo by cygwin.din. */ - if (last_slash == path) - { - *dir++ = '/'; - *dir = 0; - } - else if (last_slash > path) - { - memcpy (dir, path, last_slash - path); - dir[last_slash - path] = 0; - } - else - { - if (dir_started_p) - ; /* nothing to do */ - else - *dir++ = '.'; - *dir = 0; - } +extern "C" int +cygwin_conv_to_posix_path (const char *path, char *posix_path) +{ + return cygwin_conv_path (CCP_WIN_A_TO_POSIX | CCP_RELATIVE, path, posix_path, + MAX_PATH); +} - memcpy (file, last_slash + 1, end - last_slash - 1); - file[end - last_slash - 1] = 0; - } +extern "C" int +cygwin_conv_to_full_posix_path (const char *path, char *posix_path) +{ + return cygwin_conv_path (CCP_WIN_A_TO_POSIX | CCP_ABSOLUTE, path, posix_path, + MAX_PATH); +} - /*****************************************************************************/ +/* The realpath function is supported on some UNIX systems. */ - static inline PRTL_USER_PROCESS_PARAMETERS - get_user_proc_parms () - { - return NtCurrentTeb ()->Peb->ProcessParameters; - } +extern "C" char * +realpath (const char *path, char *resolved) +{ + /* Make sure the right errno is returned if path is NULL. */ + if (!path) + { + set_errno (EINVAL); + return NULL; + } - /* Initialize cygcwd 'muto' for serializing access to cwd info. */ - void - cwdstuff::init () - { - cwd_lock.init ("cwd_lock"); - /* Initially re-open the cwd to allow POSIX semantics. */ - set (NULL, NULL, true); - } + /* Guard reading from a potentially invalid path and writing to a + potentially invalid resolved. */ + tmp_pathbuf tp; + myfault efault; + if (efault.faulted (EFAULT)) + return NULL; - /* Chdir and fill out the elements of a cwdstuff struct. */ - int - cwdstuff::set (PUNICODE_STRING nat_cwd, const char *posix_cwd, bool doit) - { - int res = 0; - UNICODE_STRING upath; - size_t len = 0; + char *tpath; + if (isdrive (path)) + { + tpath = tp.c_get (); + mount_table->cygdrive_posix_path (path, tpath, 0); + } + else + tpath = (char *) path; - cwd_lock.acquire (); + path_conv real_path (tpath, PC_SYM_FOLLOW | PC_POSIX, stat_suffixes); - if (nat_cwd) - { - upath = *nat_cwd; - if (upath.Buffer[0] == L'/') /* Virtual path. Never use in PEB. */ - doit = false; - else - { - len = upath.Length / sizeof (WCHAR) - 4; - if (RtlEqualUnicodePathPrefix (&upath, L"\\??\\UNC\\", TRUE)) - len -= 2; - } - } - if (doit) - { - /* We utilize the user parameter block. The directory is - stored manually there. Why the hassle? + /* Linux has this funny non-standard extension. If "resolved" is NULL, + realpath mallocs the space by itself and returns it to the application. + The application is responsible for calling free() then. This extension + is backed by POSIX, which allows implementation-defined behaviour if + "resolved" is NULL. That's good enough for us to do the same here. */ - - SetCurrentDirectory fails for directories with strict - permissions even for processes with the SE_BACKUP_NAME - privilege enabled. The reason is apparently that - SetCurrentDirectory calls NtOpenFile without the - FILE_OPEN_FOR_BACKUP_INTENT flag set. + if (!real_path.error && real_path.exists ()) + { + if (!resolved) + { + resolved = (char *) malloc (strlen (real_path.normalized_path) + 1); + if (!resolved) + return NULL; + } + strcpy (resolved, real_path.normalized_path); + return resolved; + } - - Unlinking a cwd fails because SetCurrentDirectory seems to - open directories so that deleting the directory is disallowed. - The below code opens with *all* sharing flags set. */ - HANDLE h; - NTSTATUS status; - IO_STATUS_BLOCK io; - OBJECT_ATTRIBUTES attr; - PHANDLE phdl; + /* FIXME: on error, we are supposed to put the name of the path + component which could not be resolved into RESOLVED. */ + if (resolved) + resolved[0] = '\0'; + set_errno (real_path.error ?: ENOENT); + return NULL; +} - RtlAcquirePebLock (); - phdl = &get_user_proc_parms ()->CurrentDirectoryHandle; - if (!nat_cwd) /* On init, just reopen CWD with desired access flags. */ - RtlInitUnicodeString (&upath, L""); - InitializeObjectAttributes (&attr, &upath, - OBJ_CASE_INSENSITIVE | OBJ_INHERIT, - nat_cwd ? NULL : *phdl, NULL); - status = NtOpenFile (&h, SYNCHRONIZE | FILE_TRAVERSE, &attr, &io, - FILE_SHARE_VALID_FLAGS, - FILE_DIRECTORY_FILE - | FILE_SYNCHRONOUS_IO_NONALERT - | FILE_OPEN_FOR_BACKUP_INTENT); - if (!NT_SUCCESS (status)) - { - RtlReleasePebLock (); - __seterrno_from_nt_status (status); - res = -1; - goto out; - } - /* Workaround a problem in Vista/Longhorn which fails in subsequent - calls to CreateFile with ERROR_INVALID_HANDLE if the handle in - CurrentDirectoryHandle changes without calling SetCurrentDirectory, - and the filename given to CreateFile is a relative path. It looks - like Vista stores a copy of the CWD handle in some other undocumented - place. The NtClose/DuplicateHandle reuses the original handle for - the copy of the new handle and the next CreateFile works. - Note that this is not thread-safe (yet?) */ - NtClose (*phdl); - if (DuplicateHandle (GetCurrentProcess (), h, GetCurrentProcess (), phdl, - 0, TRUE, DUPLICATE_SAME_ACCESS)) - NtClose (h); - else - *phdl = h; - dir = *phdl; +/* Return non-zero if path is a POSIX path list. + This is exported to the world as cygwin_foo by cygwin.din. - /* No need to set path on init. */ - if (nat_cwd - /* TODO: - Check the length of the new CWD. Windows can only handle - CWDs of up to MAX_PATH length, including a trailing backslash. - If the path is longer, it's not an error condition for Cygwin, - so we don't fail. Windows on the other hand has a problem now. - For now, we just don't store the path in the PEB and proceed as - usual. */ - && len <= MAX_PATH - (nat_cwd->Buffer[len - 1] == L'\\' ? 1 : 2)) - { - /* Convert to a Win32 path. */ - upath.Buffer += upath.Length / sizeof (WCHAR) - len; - if (upath.Buffer[1] == L'\\') /* UNC path */ - upath.Buffer[0] = L'\\'; - upath.Length = len * sizeof (WCHAR); - /* Append backslash if necessary. */ - if (upath.Buffer[len - 1] != L'\\') - { - upath.Buffer[len] = L'\\'; - upath.Length += sizeof (WCHAR); - } - RtlCopyUnicodeString (&get_user_proc_parms ()->CurrentDirectoryName, - &upath); - } +DOCTOOL-START + + Rather than use a mode to say what the "proper" path list + format is, we allow any, and give apps the tools they need to + convert between the two. If a ';' is present in the path list it's + a Win32 path list. Otherwise, if the first path begins with + [letter]: (in which case it can be the only element since if it + wasn't a ';' would be present) it's a Win32 path list. Otherwise, + it's a POSIX path list. + +DOCTOOL-END + */ - RtlReleasePebLock (); - } +extern "C" int +cygwin_posix_path_list_p (const char *path) +{ + int posix_p = !(strchr (path, ';') || isdrive (path)); + return posix_p; +} - if (nat_cwd || !win32.Buffer) - { - /* If there is no win32 path */ - if (!nat_cwd) - { - PUNICODE_STRING pdir; +/* These are used for apps that need to convert env vars like PATH back and + forth. The conversion is a two step process. First, an upper bound on the + size of the buffer needed is computed. Then the conversion is done. This + allows the caller to use alloca if it wants. */ - RtlAcquirePebLock (); - pdir = &get_user_proc_parms ()->CurrentDirectoryName; - RtlInitEmptyUnicodeString (&win32, - (PWCHAR) crealloc_abort (win32.Buffer, - pdir->Length + 2), - pdir->Length + 2); - RtlCopyUnicodeString (&win32, pdir); - RtlReleasePebLock (); - /* Remove trailing slash. */ - if (win32.Length > 3 * sizeof (WCHAR)) - win32.Length -= sizeof (WCHAR); - posix_cwd = NULL; - } - else - { - if (upath.Buffer[0] == L'/') /* Virtual path, don't mangle. */ - ; - else if (!doit) - { - /* Convert to a Win32 path. */ - upath.Buffer += upath.Length / sizeof (WCHAR) - len; - if (upath.Buffer[1] == L'\\') /* UNC path */ - upath.Buffer[0] = L'\\'; - upath.Length = len * sizeof (WCHAR); - } - else if (upath.Length > 3 * sizeof (WCHAR)) - upath.Length -= sizeof (WCHAR); /* Strip trailing backslash */ - RtlInitEmptyUnicodeString (&win32, - (PWCHAR) crealloc_abort (win32.Buffer, - upath.Length + 2), - upath.Length + 2); - RtlCopyUnicodeString (&win32, &upath); - } - /* Make sure it's NUL-termniated. */ - win32.Buffer[win32.Length / sizeof (WCHAR)] = L'\0'; - if (!doit) /* Virtual path */ - drive_length = 0; - else if (win32.Buffer[1] == L':') /* X: */ - drive_length = 2; - else if (win32.Buffer[1] == L'\\') /* UNC path */ - { - PWCHAR ptr = wcschr (win32.Buffer + 2, L'\\'); - if (ptr) - ptr = wcschr (ptr + 1, L'\\'); - if (ptr) - drive_length = ptr - win32.Buffer; - else - drive_length = win32.Length / sizeof (WCHAR); - } - else /* Shouldn't happen */ - drive_length = 0; +static int +conv_path_list_buf_size (const char *path_list, bool to_posix) +{ + int i, num_elms, max_mount_path_len, size; + const char *p; - tmp_pathbuf tp; - if (!posix_cwd) - { - posix_cwd = (const char *) tp.c_get (); - mount_table->conv_to_posix_path (win32.Buffer, (char *) posix_cwd, 0); - } - posix = (char *) crealloc_abort (posix, strlen (posix_cwd) + 1); - stpcpy (posix, posix_cwd); - } + path_conv pc(".", PC_POSIX); + /* The theory is that an upper bound is + current_size + (num_elms * max_mount_path_len) */ + /* FIXME: This method is questionable in the long run. */ - out: - cwd_lock.release (); - return res; - } + unsigned nrel; + char delim = to_posix ? ';' : ':'; + for (p = path_list, num_elms = nrel = 0; p; num_elms++) + { + if (!isabspath (p)) + nrel++; + p = strchr (++p, delim); + } - /* Copy the value for either the posix or the win32 cwd into a buffer. */ - char * - cwdstuff::get (char *buf, int need_posix, int with_chroot, unsigned ulen) - { - MALLOC_CHECK; + /* 7: strlen ("//c") + slop, a conservative initial value */ + for (max_mount_path_len = sizeof ("/cygdrive/X"), i = 0; + i < mount_table->nmounts; i++) + { + int mount_len = (to_posix + ? mount_table->mount[i].posix_pathlen + : mount_table->mount[i].native_pathlen); + if (max_mount_path_len < mount_len) + max_mount_path_len = mount_len; + } - tmp_pathbuf tp; - if (ulen) - /* nothing */; - else if (buf == NULL) - ulen = (unsigned) -1; - else - { - set_errno (EINVAL); - goto out; - } + /* 100: slop */ + size = strlen (path_list) + + (num_elms * max_mount_path_len) + + (nrel * strlen (to_posix ? pc.normalized_path : pc.get_win32 ())) + + 100; - cwd_lock.acquire (); + return size; +} - char *tocopy; - if (!need_posix) - { - tocopy = tp.c_get (); - sys_wcstombs (tocopy, NT_MAX_PATH, win32.Buffer, - win32.Length / sizeof (WCHAR)); - } - else - tocopy = posix; - debug_printf ("posix %s", posix); - if (strlen (tocopy) >= ulen) - { - set_errno (ERANGE); - buf = NULL; - } - else - { - if (!buf) - buf = (char *) malloc (strlen (tocopy) + 1); - strcpy (buf, tocopy); - if (!buf[0]) /* Should only happen when chroot */ - strcpy (buf, "/"); - } +extern "C" int +cygwin_win32_to_posix_path_list_buf_size (const char *path_list) +{ + return conv_path_list_buf_size (path_list, true); +} - cwd_lock.release (); +extern "C" int +cygwin_posix_to_win32_path_list_buf_size (const char *path_list) +{ + return conv_path_list_buf_size (path_list, false); +} - out: - syscall_printf ("(%s) = cwdstuff::get (%p, %d, %d, %d), errno %d", - buf, buf, ulen, need_posix, with_chroot, errno); - MALLOC_CHECK; - return buf; - } +extern "C" ssize_t +env_PATH_to_posix (const void *win32, void *posix, size_t size) +{ + return_with_errno (conv_path_list ((const char *) win32, (char *) posix, + size, ENV_CVT)); +} - int etc::curr_ix = 0; - /* Note that the first elements of the below arrays are unused */ - bool etc::change_possible[MAX_ETC_FILES + 1]; - OBJECT_ATTRIBUTES etc::fn[MAX_ETC_FILES + 1]; - LARGE_INTEGER etc::last_modified[MAX_ETC_FILES + 1]; +extern "C" int +cygwin_win32_to_posix_path_list (const char *win32, char *posix) +{ + return_with_errno (conv_path_list (win32, posix, MAX_PATH, 1)); +} - int - etc::init (int n, PUNICODE_STRING etc_fn) - { - if (n > 0) - /* ok */; - else if (++curr_ix <= MAX_ETC_FILES) - n = curr_ix; - else - api_fatal ("internal error"); +extern "C" int +cygwin_posix_to_win32_path_list (const char *posix, char *win32) +{ + return_with_errno (conv_path_list (posix, win32, MAX_PATH, 0)); +} - InitializeObjectAttributes (&fn[n], etc_fn, OBJ_CASE_INSENSITIVE, NULL, NULL); - change_possible[n] = false; - test_file_change (n); - paranoid_printf ("fn[%d] %S, curr_ix %d", n, fn[n].ObjectName, curr_ix); - return n; - } +extern "C" ssize_t +cygwin_conv_path_list (cygwin_conv_path_t what, const void *from, void *to, + size_t size) +{ + /* FIXME: Path lists are (so far) always retaining relative paths. */ + what &= ~CCP_RELATIVE; + switch (what) + { + case CCP_WIN_W_TO_POSIX: + case CCP_POSIX_TO_WIN_W: + /*FIXME*/ + api_fatal ("wide char path lists not yet supported"); + break; + case CCP_WIN_A_TO_POSIX: + case CCP_POSIX_TO_WIN_A: + if (size == 0) + return conv_path_list_buf_size ((const char *) from, + what == CCP_WIN_A_TO_POSIX); + return_with_errno (conv_path_list ((const char *) from, (char *) to, + size, what == CCP_WIN_A_TO_POSIX)); + break; + default: + break; + } + set_errno (EINVAL); + return -1; +} - bool - etc::test_file_change (int n) - { - NTSTATUS status; - FILE_NETWORK_OPEN_INFORMATION fnoi; - bool res; +/* cygwin_split_path: Split a path into directory and file name parts. + Buffers DIR and FILE are assumed to be big enough. - status = NtQueryFullAttributesFile (&fn[n], &fnoi); - if (!NT_SUCCESS (status)) - { - res = true; - memset (last_modified + n, 0, sizeof (last_modified[n])); - debug_printf ("NtQueryFullAttributesFile (%S) failed, %p", - fn[n].ObjectName, status); - } - else - { - res = CompareFileTime ((FILETIME *) &fnoi.LastWriteTime, - (FILETIME *) last_modified + n) > 0; - last_modified[n].QuadPart = fnoi.LastWriteTime.QuadPart; - } + Examples (path -> `dir' / `file'): + / -> `/' / `' + "" -> `.' / `' + . -> `.' / `.' (FIXME: should this be `.' / `'?) + .. -> `.' / `..' (FIXME: should this be `..' / `'?) + foo -> `.' / `foo' + foo/bar -> `foo' / `bar' + foo/bar/ -> `foo' / `bar' + /foo -> `/' / `foo' + /foo/bar -> `/foo' / `bar' + c: -> `c:/' / `' + c:/ -> `c:/' / `' + c:foo -> `c:/' / `foo' + c:/foo -> `c:/' / `foo' + */ - paranoid_printf ("fn[%d] %S res %d", n, fn[n].ObjectName, res); - return res; - } +extern "C" void +cygwin_split_path (const char *path, char *dir, char *file) +{ + int dir_started_p = 0; - bool - etc::dir_changed (int n) - { - if (!change_possible[n]) - { - static HANDLE changed_h NO_COPY; - NTSTATUS status; - IO_STATUS_BLOCK io; + /* Deal with drives. + Remember that c:foo <==> c:/foo. */ + if (isdrive (path)) + { + *dir++ = *path++; + *dir++ = *path++; + *dir++ = '/'; + if (!*path) + { + *dir = 0; + *file = 0; + return; + } + if (isdirsep (*path)) + ++path; + dir_started_p = 1; + } - if (!changed_h) - { - OBJECT_ATTRIBUTES attr; + /* Determine if there are trailing slashes and "delete" them if present. + We pretend as if they don't exist. */ + const char *end = path + strlen (path); + /* path + 1: keep leading slash. */ + while (end > path + 1 && isdirsep (end[-1])) + --end; - path_conv dir ("/etc"); - status = NtOpenFile (&changed_h, SYNCHRONIZE | FILE_LIST_DIRECTORY, - dir.get_object_attr (attr, sec_none_nih), &io, - FILE_SHARE_VALID_FLAGS, FILE_DIRECTORY_FILE); - if (!NT_SUCCESS (status)) - { -#ifdef DEBUGGING - system_printf ("NtOpenFile (%S) failed, %p", - dir.get_nt_native_path (), status); -#endif - changed_h = INVALID_HANDLE_VALUE; - } - else - { - status = NtNotifyChangeDirectoryFile (changed_h, NULL, NULL, - NULL, &io, NULL, 0, - FILE_NOTIFY_CHANGE_LAST_WRITE - | FILE_NOTIFY_CHANGE_FILE_NAME, - FALSE); - if (!NT_SUCCESS (status)) - { -#ifdef DEBUGGING - system_printf ("NtNotifyChangeDirectoryFile (1) failed, %p", - status); -#endif - NtClose (changed_h); - changed_h = INVALID_HANDLE_VALUE; - } - } - memset (change_possible, true, sizeof (change_possible)); - } + /* At this point, END points to one beyond the last character + (with trailing slashes "deleted"). */ - if (changed_h == INVALID_HANDLE_VALUE) - change_possible[n] = true; - else if (WaitForSingleObject (changed_h, 0) == WAIT_OBJECT_0) - { - status = NtNotifyChangeDirectoryFile (changed_h, NULL, NULL, - NULL, &io, NULL, 0, - FILE_NOTIFY_CHANGE_LAST_WRITE - | FILE_NOTIFY_CHANGE_FILE_NAME, - FALSE); - if (!NT_SUCCESS (status)) - { -#ifdef DEBUGGING - system_printf ("NtNotifyChangeDirectoryFile (2) failed, %p", - status); -#endif - NtClose (changed_h); - changed_h = INVALID_HANDLE_VALUE; - } - memset (change_possible, true, sizeof change_possible); - } - } + /* Point LAST_SLASH at the last slash (duh...). */ + const char *last_slash; + for (last_slash = end - 1; last_slash >= path; --last_slash) + if (isdirsep (*last_slash)) + break; - paranoid_printf ("fn[%d] %S change_possible %d", - n, fn[n].ObjectName, change_possible[n]); - return change_possible[n]; - } + if (last_slash == path) + { + *dir++ = '/'; + *dir = 0; + } + else if (last_slash > path) + { + memcpy (dir, path, last_slash - path); + dir[last_slash - path] = 0; + } + else + { + if (dir_started_p) + ; /* nothing to do */ + else + *dir++ = '.'; + *dir = 0; + } - bool - etc::file_changed (int n) - { - bool res = false; - if (dir_changed (n) && test_file_change (n)) + memcpy (file, last_slash + 1, end - last_slash - 1); + file[end - last_slash - 1] = 0; +} + +/*****************************************************************************/ + +static inline PRTL_USER_PROCESS_PARAMETERS +get_user_proc_parms () +{ + return NtCurrentTeb ()->Peb->ProcessParameters; +} + +/* Initialize cygcwd 'muto' for serializing access to cwd info. */ +void +cwdstuff::init () +{ + cwd_lock.init ("cwd_lock"); + /* Initially re-open the cwd to allow POSIX semantics. */ + set (NULL, NULL, true); +} + +/* Chdir and fill out the elements of a cwdstuff struct. */ +int +cwdstuff::set (PUNICODE_STRING nat_cwd, const char *posix_cwd, bool doit) +{ + int res = 0; + UNICODE_STRING upath; + size_t len = 0; + + cwd_lock.acquire (); + + if (nat_cwd) + { + upath = *nat_cwd; + if (upath.Buffer[0] == L'/') /* Virtual path. Never use in PEB. */ + doit = false; + else + { + len = upath.Length / sizeof (WCHAR) - 4; + if (RtlEqualUnicodePathPrefix (&upath, L"\\??\\UNC\\", TRUE)) + len -= 2; + } + } + + if (doit) + { + /* We utilize the user parameter block. The directory is + stored manually there. Why the hassle? + + - SetCurrentDirectory fails for directories with strict + permissions even for processes with the SE_BACKUP_NAME + privilege enabled. The reason is apparently that + SetCurrentDirectory calls NtOpenFile without the + FILE_OPEN_FOR_BACKUP_INTENT flag set. + + - Unlinking a cwd fails because SetCurrentDirectory seems to + open directories so that deleting the directory is disallowed. + The below code opens with *all* sharing flags set. */ + HANDLE h; + NTSTATUS status; + IO_STATUS_BLOCK io; + OBJECT_ATTRIBUTES attr; + PHANDLE phdl; + + RtlAcquirePebLock (); + phdl = &get_user_proc_parms ()->CurrentDirectoryHandle; + if (!nat_cwd) /* On init, just reopen CWD with desired access flags. */ + RtlInitUnicodeString (&upath, L""); + InitializeObjectAttributes (&attr, &upath, + OBJ_CASE_INSENSITIVE | OBJ_INHERIT, + nat_cwd ? NULL : *phdl, NULL); + status = NtOpenFile (&h, SYNCHRONIZE | FILE_TRAVERSE, &attr, &io, + FILE_SHARE_VALID_FLAGS, + FILE_DIRECTORY_FILE + | FILE_SYNCHRONOUS_IO_NONALERT + | FILE_OPEN_FOR_BACKUP_INTENT); + if (!NT_SUCCESS (status)) + { + RtlReleasePebLock (); + __seterrno_from_nt_status (status); + res = -1; + goto out; + } + /* Workaround a problem in Vista/Longhorn which fails in subsequent + calls to CreateFile with ERROR_INVALID_HANDLE if the handle in + CurrentDirectoryHandle changes without calling SetCurrentDirectory, + and the filename given to CreateFile is a relative path. It looks + like Vista stores a copy of the CWD handle in some other undocumented + place. The NtClose/DuplicateHandle reuses the original handle for + the copy of the new handle and the next CreateFile works. + Note that this is not thread-safe (yet?) */ + NtClose (*phdl); + if (DuplicateHandle (GetCurrentProcess (), h, GetCurrentProcess (), phdl, + 0, TRUE, DUPLICATE_SAME_ACCESS)) + NtClose (h); + else + *phdl = h; + dir = *phdl; + + /* No need to set path on init. */ + if (nat_cwd + /* TODO: + Check the length of the new CWD. Windows can only handle + CWDs of up to MAX_PATH length, including a trailing backslash. + If the path is longer, it's not an error condition for Cygwin, + so we don't fail. Windows on the other hand has a problem now. + For now, we just don't store the path in the PEB and proceed as + usual. */ + && len <= MAX_PATH - (nat_cwd->Buffer[len - 1] == L'\\' ? 1 : 2)) + { + /* Convert to a Win32 path. */ + upath.Buffer += upath.Length / sizeof (WCHAR) - len; + if (upath.Buffer[1] == L'\\') /* UNC path */ + upath.Buffer[0] = L'\\'; + upath.Length = len * sizeof (WCHAR); + /* Append backslash if necessary. */ + if (upath.Buffer[len - 1] != L'\\') + { + upath.Buffer[len] = L'\\'; + upath.Length += sizeof (WCHAR); + } + RtlCopyUnicodeString (&get_user_proc_parms ()->CurrentDirectoryName, + &upath); + } + + RtlReleasePebLock (); + } + + if (nat_cwd || !win32.Buffer) + { + /* If there is no win32 path */ + if (!nat_cwd) + { + PUNICODE_STRING pdir; + + RtlAcquirePebLock (); + pdir = &get_user_proc_parms ()->CurrentDirectoryName; + RtlInitEmptyUnicodeString (&win32, + (PWCHAR) crealloc_abort (win32.Buffer, + pdir->Length + 2), + pdir->Length + 2); + RtlCopyUnicodeString (&win32, pdir); + RtlReleasePebLock (); + /* Remove trailing slash. */ + if (win32.Length > 3 * sizeof (WCHAR)) + win32.Length -= sizeof (WCHAR); + posix_cwd = NULL; + } + else + { + if (upath.Buffer[0] == L'/') /* Virtual path, don't mangle. */ + ; + else if (!doit) + { + /* Convert to a Win32 path. */ + upath.Buffer += upath.Length / sizeof (WCHAR) - len; + if (upath.Buffer[1] == L'\\') /* UNC path */ + upath.Buffer[0] = L'\\'; + upath.Length = len * sizeof (WCHAR); + } + else if (upath.Length > 3 * sizeof (WCHAR)) + upath.Length -= sizeof (WCHAR); /* Strip trailing backslash */ + RtlInitEmptyUnicodeString (&win32, + (PWCHAR) crealloc_abort (win32.Buffer, + upath.Length + 2), + upath.Length + 2); + RtlCopyUnicodeString (&win32, &upath); + } + /* Make sure it's NUL-termniated. */ + win32.Buffer[win32.Length / sizeof (WCHAR)] = L'\0'; + if (!doit) /* Virtual path */ + drive_length = 0; + else if (win32.Buffer[1] == L':') /* X: */ + drive_length = 2; + else if (win32.Buffer[1] == L'\\') /* UNC path */ + { + PWCHAR ptr = wcschr (win32.Buffer + 2, L'\\'); + if (ptr) + ptr = wcschr (ptr + 1, L'\\'); + if (ptr) + drive_length = ptr - win32.Buffer; + else + drive_length = win32.Length / sizeof (WCHAR); + } + else /* Shouldn't happen */ + drive_length = 0; + + tmp_pathbuf tp; + if (!posix_cwd) + { + posix_cwd = (const char *) tp.c_get (); + mount_table->conv_to_posix_path (win32.Buffer, (char *) posix_cwd, 0); + } + posix = (char *) crealloc_abort (posix, strlen (posix_cwd) + 1); + stpcpy (posix, posix_cwd); + } + +out: + cwd_lock.release (); + return res; +} + +/* Copy the value for either the posix or the win32 cwd into a buffer. */ +char * +cwdstuff::get (char *buf, int need_posix, int with_chroot, unsigned ulen) +{ + MALLOC_CHECK; + + tmp_pathbuf tp; + if (ulen) + /* nothing */; + else if (buf == NULL) + ulen = (unsigned) -1; + else + { + set_errno (EINVAL); + goto out; + } + + cwd_lock.acquire (); + + char *tocopy; + if (!need_posix) + { + tocopy = tp.c_get (); + sys_wcstombs (tocopy, NT_MAX_PATH, win32.Buffer, + win32.Length / sizeof (WCHAR)); + } + else + tocopy = posix; + + debug_printf ("posix %s", posix); + if (strlen (tocopy) >= ulen) + { + set_errno (ERANGE); + buf = NULL; + } + else + { + if (!buf) + buf = (char *) malloc (strlen (tocopy) + 1); + strcpy (buf, tocopy); + if (!buf[0]) /* Should only happen when chroot */ + strcpy (buf, "/"); + } + + cwd_lock.release (); + +out: + syscall_printf ("(%s) = cwdstuff::get (%p, %d, %d, %d), errno %d", + buf, buf, ulen, need_posix, with_chroot, errno); + MALLOC_CHECK; + return buf; +} + +int etc::curr_ix = 0; +/* Note that the first elements of the below arrays are unused */ +bool etc::change_possible[MAX_ETC_FILES + 1]; +OBJECT_ATTRIBUTES etc::fn[MAX_ETC_FILES + 1]; +LARGE_INTEGER etc::last_modified[MAX_ETC_FILES + 1]; + +int +etc::init (int n, PUNICODE_STRING etc_fn) +{ + if (n > 0) + /* ok */; + else if (++curr_ix <= MAX_ETC_FILES) + n = curr_ix; + else + api_fatal ("internal error"); + + InitializeObjectAttributes (&fn[n], etc_fn, OBJ_CASE_INSENSITIVE, NULL, NULL); + change_possible[n] = false; + test_file_change (n); + paranoid_printf ("fn[%d] %S, curr_ix %d", n, fn[n].ObjectName, curr_ix); + return n; +} + +bool +etc::test_file_change (int n) +{ + NTSTATUS status; + FILE_NETWORK_OPEN_INFORMATION fnoi; + bool res; + + status = NtQueryFullAttributesFile (&fn[n], &fnoi); + if (!NT_SUCCESS (status)) + { res = true; - change_possible[n] = false; /* Change is no longer possible */ - paranoid_printf ("fn[%d] %S res %d", n, fn[n].ObjectName, res); - return res; - } + memset (last_modified + n, 0, sizeof (last_modified[n])); + debug_printf ("NtQueryFullAttributesFile (%S) failed, %p", + fn[n].ObjectName, status); + } + else + { + res = CompareFileTime ((FILETIME *) &fnoi.LastWriteTime, + (FILETIME *) last_modified + n) > 0; + last_modified[n].QuadPart = fnoi.LastWriteTime.QuadPart; + } - /* No need to be reentrant or thread-safe according to SUSv3. - / and \\ are treated equally. Leading drive specifiers are - kept intact as far as it makes sense. Everything else is - POSIX compatible. */ - extern "C" char * - basename (char *path) - { - static char buf[4]; - char *c, *d, *bs = path; + paranoid_printf ("fn[%d] %S res %d", n, fn[n].ObjectName, res); + return res; +} - if (!path || !*path) - return strcpy (buf, "."); - if (isalpha (path[0]) && path[1] == ':') - bs += 2; - else if (strspn (path, "/\\") > 1) - ++bs; - c = strrchr (bs, '/'); - if ((d = strrchr (c ?: bs, '\\')) > c) - c = d; - if (c) - { - /* Trailing (back)slashes are eliminated. */ - while (c && c > bs && c[1] == '\0') - { - *c = '\0'; - c = strrchr (bs, '/'); - if ((d = strrchr (c ?: bs, '\\')) > c) - c = d; - } - if (c && (c > bs || c[1])) - return c + 1; - } - else if (!bs[0]) - { - stpncpy (buf, path, bs - path); - stpcpy (buf + (bs - path), "."); - return buf; - } - return path; - } +bool +etc::dir_changed (int n) +{ + if (!change_possible[n]) + { + static HANDLE changed_h NO_COPY; + NTSTATUS status; + IO_STATUS_BLOCK io; - /* No need to be reentrant or thread-safe according to SUSv3. - / and \\ are treated equally. Leading drive specifiers and - leading double (back)slashes are kept intact as far as it - makes sense. Everything else is POSIX compatible. */ - extern "C" char * - dirname (char *path) - { - static char buf[4]; - char *c, *d, *bs = path; + if (!changed_h) + { + OBJECT_ATTRIBUTES attr; - if (!path || !*path) - return strcpy (buf, "."); - if (isalpha (path[0]) && path[1] == ':') - bs += 2; - else if (strspn (path, "/\\") > 1) - ++bs; - c = strrchr (bs, '/'); - if ((d = strrchr (c ?: bs, '\\')) > c) - c = d; - if (c) - { - /* Trailing (back)slashes are eliminated. */ - while (c && c > bs && c[1] == '\0') - { - *c = '\0'; - c = strrchr (bs, '/'); - if ((d = strrchr (c ?: bs, '\\')) > c) - c = d; - } - if (!c) - strcpy (bs, "."); - else if (c > bs) - { - /* More trailing (back)slashes are eliminated. */ - while (c > bs && (*c == '/' || *c == '\\')) - *c-- = '\0'; - } - else - c[1] = '\0'; - } - else - { - stpncpy (buf, path, bs - path); - stpcpy (buf + (bs - path), "."); - return buf; - } - return path; - } + path_conv dir ("/etc"); + status = NtOpenFile (&changed_h, SYNCHRONIZE | FILE_LIST_DIRECTORY, + dir.get_object_attr (attr, sec_none_nih), &io, + FILE_SHARE_VALID_FLAGS, FILE_DIRECTORY_FILE); + if (!NT_SUCCESS (status)) + { +#ifdef DEBUGGING + system_printf ("NtOpenFile (%S) failed, %p", + dir.get_nt_native_path (), status); +#endif + changed_h = INVALID_HANDLE_VALUE; + } + else + { + status = NtNotifyChangeDirectoryFile (changed_h, NULL, NULL, + NULL, &io, NULL, 0, + FILE_NOTIFY_CHANGE_LAST_WRITE + | FILE_NOTIFY_CHANGE_FILE_NAME, + FALSE); + if (!NT_SUCCESS (status)) + { +#ifdef DEBUGGING + system_printf ("NtNotifyChangeDirectoryFile (1) failed, %p", + status); +#endif + NtClose (changed_h); + changed_h = INVALID_HANDLE_VALUE; + } + } + memset (change_possible, true, sizeof (change_possible)); + } + + if (changed_h == INVALID_HANDLE_VALUE) + change_possible[n] = true; + else if (WaitForSingleObject (changed_h, 0) == WAIT_OBJECT_0) + { + status = NtNotifyChangeDirectoryFile (changed_h, NULL, NULL, + NULL, &io, NULL, 0, + FILE_NOTIFY_CHANGE_LAST_WRITE + | FILE_NOTIFY_CHANGE_FILE_NAME, + FALSE); + if (!NT_SUCCESS (status)) + { +#ifdef DEBUGGING + system_printf ("NtNotifyChangeDirectoryFile (2) failed, %p", + status); +#endif + NtClose (changed_h); + changed_h = INVALID_HANDLE_VALUE; + } + memset (change_possible, true, sizeof change_possible); + } + } + + paranoid_printf ("fn[%d] %S change_possible %d", + n, fn[n].ObjectName, change_possible[n]); + return change_possible[n]; +} + +bool +etc::file_changed (int n) +{ + bool res = false; + if (dir_changed (n) && test_file_change (n)) + res = true; + change_possible[n] = false; /* Change is no longer possible */ + paranoid_printf ("fn[%d] %S res %d", n, fn[n].ObjectName, res); + return res; +} + +/* No need to be reentrant or thread-safe according to SUSv3. + / and \\ are treated equally. Leading drive specifiers are + kept intact as far as it makes sense. Everything else is + POSIX compatible. */ +extern "C" char * +basename (char *path) +{ + static char buf[4]; + char *c, *d, *bs = path; + + if (!path || !*path) + return strcpy (buf, "."); + if (isalpha (path[0]) && path[1] == ':') + bs += 2; + else if (strspn (path, "/\\") > 1) + ++bs; + c = strrchr (bs, '/'); + if ((d = strrchr (c ?: bs, '\\')) > c) + c = d; + if (c) + { + /* Trailing (back)slashes are eliminated. */ + while (c && c > bs && c[1] == '\0') + { + *c = '\0'; + c = strrchr (bs, '/'); + if ((d = strrchr (c ?: bs, '\\')) > c) + c = d; + } + if (c && (c > bs || c[1])) + return c + 1; + } + else if (!bs[0]) + { + stpncpy (buf, path, bs - path); + stpcpy (buf + (bs - path), "."); + return buf; + } + return path; +} + +/* No need to be reentrant or thread-safe according to SUSv3. + / and \\ are treated equally. Leading drive specifiers and + leading double (back)slashes are kept intact as far as it + makes sense. Everything else is POSIX compatible. */ +extern "C" char * +dirname (char *path) +{ + static char buf[4]; + char *c, *d, *bs = path; + + if (!path || !*path) + return strcpy (buf, "."); + if (isalpha (path[0]) && path[1] == ':') + bs += 2; + else if (strspn (path, "/\\") > 1) + ++bs; + c = strrchr (bs, '/'); + if ((d = strrchr (c ?: bs, '\\')) > c) + c = d; + if (c) + { + /* Trailing (back)slashes are eliminated. */ + while (c && c > bs && c[1] == '\0') + { + *c = '\0'; + c = strrchr (bs, '/'); + if ((d = strrchr (c ?: bs, '\\')) > c) + c = d; + } + if (!c) + strcpy (bs, "."); + else if (c > bs) + { + /* More trailing (back)slashes are eliminated. */ + while (c > bs && (*c == '/' || *c == '\\')) + *c-- = '\0'; + } + else + c[1] = '\0'; + } + else + { + stpncpy (buf, path, bs - path); + stpcpy (buf + (bs - path), "."); + return buf; + } + return path; +}