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* fhandler_disk_file.cc (fhandler_disk_file::link): Revert to checking

Browse Source 
for binary in case of .exe files.
	* ntdll.h (RtlPrefixUnicodeString): Declare.
	* path.cc (path_conv::is_binary): New method.
	* path.h (path_conv::is_binary): Declare.
	* syscalls.cc (rename_append_suffix): New static helper function for
	rename.
	(rename): Rewrite.  New suffix tests.  Use native NT functions.
This commit is contained in:
Corinna Vinschen 2007-07-31 15:20:00 +00:00
parent 378692ee42
commit 9235f3ead1
6 changed files with 191 additions and 153 deletions
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11
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,14 @@
2007-07-31 Corinna Vinschen <corinna@vinschen.de>
* fhandler_disk_file.cc (fhandler_disk_file::link): Revert to checking
for binary in case of .exe files.
* ntdll.h (RtlPrefixUnicodeString): Declare.
* path.cc (path_conv::is_binary): New method.
* path.h (path_conv::is_binary): Declare.
* syscalls.cc (rename_append_suffix): New static helper function for
rename.
(rename): Rewrite. New suffix tests. Use native NT functions.
2007-07-30 Corinna Vinschen <corinna@vinschen.de>
* fhandler_disk_file.cc (fhandler_disk_file::facl): If file can't be

3
winsup/cygwin/fhandler_disk_file.cc
View File

@ -1084,8 +1084,7 @@ fhandler_disk_file::link (const char *newpath)
newpc.check (newpath, PC_SYM_NOFOLLOW);
}
else if (!pc.isdir ()
&& RtlEqualUnicodePathSuffix (pc.get_nt_native_path (),
L".exe", TRUE)
&& pc.is_binary ()
&& !RtlEqualUnicodePathSuffix (newpc.get_nt_native_path (),
L".exe", TRUE))
{

2
winsup/cygwin/ntdll.h
View File

@ -797,6 +797,8 @@ extern "C"
ULONG NTAPI RtlNtStatusToDosError (NTSTATUS);
NTSTATUS NTAPI RtlOemStringToUnicodeString (PUNICODE_STRING, POEM_STRING,
BOOLEAN);
BOOLEAN NTAPI RtlPrefixUnicodeString (PUNICODE_STRING, PUNICODE_STRING,
BOOLEAN);
VOID NTAPI RtlSecondsSince1970ToTime (ULONG, PLARGE_INTEGER);
/* A few Rtl functions are either actually macros, or they just don't

10
winsup/cygwin/path.cc
View File

@ -1205,6 +1205,16 @@ path_conv::~path_conv ()
}
}
bool
path_conv::is_binary ()
{
DWORD bin;
PBYTE bintest[get_nt_native_path ()->Length + sizeof (WCHAR)];
return exec_state () == is_executable
&& RtlEqualUnicodePathSuffix (get_nt_native_path (), L".exe", TRUE)
&& GetBinaryTypeW (get_wide_win32_path ((PWCHAR) bintest), &bin);
}
/* Return true if src_path is a valid, internally supported device name.
In that case, win32_path gets the corresponding NT device name and
dev is appropriately filled with device information. */

1
winsup/cygwin/path.h
View File

@ -300,6 +300,7 @@ class path_conv
{
return (sizeof (*this) - sizeof (path)) + strlen (path) + 1 + normalized_path_size;
}
bool is_binary ();
unsigned __stdcall ndisk_links (DWORD);
char *normalized_path;

317
winsup/cygwin/syscalls.cc
View File

@ -1321,184 +1321,199 @@ access (const char *fn, int flags)
return res;
}
static void
rename_append_suffix (path_conv &pc, const char *path, size_t len,
const char *suffix)
{
char buf[len + 5];
if (strcasematch (path + len - 4, ".lnk")
|| strcasematch (path + len - 4, ".exe"))
len -= 4;
stpcpy (stpncpy (buf, path, len), suffix);
pc.check (buf, PC_SYM_NOFOLLOW);
}
extern "C" int
rename (const char *oldpath, const char *newpath)
{
int res = 0;
char *lnk_suffix = NULL;
bool no_lnk_file_exists = false;
path_conv real_old (oldpath, PC_SYM_NOFOLLOW,
transparent_exe ? stat_suffixes : NULL);
if (real_old.error)
int res = -1;
path_conv oldpc, newpc, new2pc, *dstpc, *removepc = NULL;
bool old_explicit_suffix = false, new_explicit_suffix = false;
size_t olen, nlen;
NTSTATUS status;
HANDLE fh;
OBJECT_ATTRIBUTES attr;
IO_STATUS_BLOCK io;
ULONG size;
PFILE_RENAME_INFORMATION pfri;
oldpc.check (oldpath, PC_SYM_NOFOLLOW, stat_suffixes);
if (oldpc.error)
{
syscall_printf ("-1 = rename (%s, %s)", oldpath, newpath);
set_errno (real_old.error);
return -1;
set_errno (oldpc.error);
goto out;
}
if (!real_old.exists ()) /* file to move doesn't exist */
if (!oldpc.exists ())
{
syscall_printf ("file to move doesn't exist");
set_errno (ENOENT);
return -1;
goto out;
}
olen = strlen (oldpath);
if (oldpc.known_suffix
&& (strcasematch (oldpath + olen - 4, ".lnk")
|| strcasematch (oldpath + olen - 4, ".exe")))
old_explicit_suffix = true;
path_conv real_new (newpath, PC_SYM_NOFOLLOW,
transparent_exe ? stat_suffixes : NULL);
char new_buf[CYG_MAX_PATH + 5];
if (!real_new.error && !real_new.case_clash)
newpc.check (newpath, PC_SYM_NOFOLLOW, stat_suffixes);
if (newpc.error)
{
DWORD bintype;
int len;
set_errno (newpc.error);
goto out;
}
if (newpc.isspecial ()) /* No renames out of the FS */
{
set_errno (EROFS);
goto out;
}
nlen = strlen (newpath);
if (newpc.known_suffix
&& (strcasematch (newpath + nlen - 4, ".lnk")
|| strcasematch (newpath + nlen - 4, ".exe")))
new_explicit_suffix = true;
if (real_old.is_lnk_special ())
if (oldpc.isdir ())
{
if (newpc.exists () && !newpc.isdir ())
{
if (real_new.exists ())
set_errno (ENOTDIR);
goto out;
}
/* Check for newpath being a subdir of oldpath. */
if (RtlPrefixUnicodeString (oldpc.get_nt_native_path (),
newpc.get_nt_native_path (),
TRUE)
&& newpc.get_nt_native_path ()->Length >
oldpc.get_nt_native_path ()->Length
&& *(PWCHAR) ((PBYTE) newpc.get_nt_native_path ()->Buffer
+ oldpc.get_nt_native_path ()->Length) == L'\\')
{
set_errno (EINVAL);
goto out;
}
}
else if (!newpc.exists ())
{
if (RtlEqualUnicodeString (oldpc.get_nt_native_path (),
newpc.get_nt_native_path (),
TRUE)
&& old_explicit_suffix != new_explicit_suffix)
{
newpc.check (newpath, PC_SYM_NOFOLLOW);
if (RtlEqualUnicodeString (oldpc.get_nt_native_path (),
newpc.get_nt_native_path (),
TRUE))
{
/* This early directory test is necessary because the below test
tests against the name with attached .lnk suffix. To avoid
name collisions, we shouldn't rename a file to "foo.lnk"
if a "foo" directory exists. */
if (real_new.isdir ())
{
syscall_printf ("newpath is directory, but oldpath is not");
set_errno (EISDIR);
return -1;
}
/* Shortcut hack, No. 3, part 1 */
no_lnk_file_exists = true;
res = 0;
goto out;
}
/* Shortcut hack. */
strcpy (new_buf, newpath);
strcat (new_buf, ".lnk");
newpath = new_buf;
real_new.check (newpath, PC_SYM_NOFOLLOW);
}
else if (transparent_exe
&& !real_old.isdir ()
&& GetBinaryType (real_old, &bintype)
&& (len = strlen (real_new)) > 4
&& !strcasematch ((const char *) real_new + len - 4, ".exe"))
{
/* Executable hack. */
strcpy (new_buf, newpath);
strcat (new_buf, ".exe");
newpath = new_buf;
real_new.check (newpath, PC_SYM_NOFOLLOW);
}
else if (oldpc.is_lnk_symlink ()
&& !RtlEqualUnicodePathSuffix (newpc.get_nt_native_path (),
L".lnk", TRUE))
rename_append_suffix (newpc, newpath, nlen, ".lnk");
else if (oldpc.is_binary ()
&& !RtlEqualUnicodePathSuffix (newpc.get_nt_native_path (),
L".exe", TRUE))
/* NOTE: No way to rename an executable foo.exe to foo. */
rename_append_suffix (newpc, newpath, nlen, ".exe");
}
if (real_new.error || real_new.case_clash)
else if (newpc.isdir ())
{
syscall_printf ("-1 = rename (%s, %s)", oldpath, newpath);
set_errno (real_new.case_clash ? ECASECLASH : real_new.error);
return -1;
}
if (real_new.isdir () && !real_old.isdir ())
{
syscall_printf ("newpath is directory, but oldpath is not");
set_errno (EISDIR);
return -1;
}
/* Destination file exists and is read only, change that or else
the rename won't work. */
if (real_new.has_attribute (FILE_ATTRIBUTE_READONLY))
SetFileAttributes (real_new, (DWORD) real_new & ~FILE_ATTRIBUTE_READONLY);
/* Shortcut hack No. 2, part 1 */
if (!real_old.issymlink () && !real_new.error && real_new.is_lnk_special ()
&& (lnk_suffix = strrchr (real_new.get_win32 (), '.')))
*lnk_suffix = '\0';
if (MoveFile (real_old, real_new))
goto done;
res = -1;
/* Test for an attempt to make a directory a subdirectory of itself first.
This test has to be made before any attempt to remove the potentially
existing file or directory real_new. Otherwise we end up with a
non-moved directory *and* a deleted read_new path. Also this case
has to generate an EINVAL in all circumstances,
NB: We could test this also before calling MoveFile but the idea is
that this is a somewhat seldom case and we like to avoid expensive
string comparison. So we allow MoveFile to fail and test the error
code instead.
The order in the condition is (hopefully) trimmed for doing the least
expensive stuff first. */
int len;
DWORD lasterr;
lasterr = GetLastError ();
if (real_old.isdir ()
&& lasterr == ERROR_SHARING_VIOLATION
&& (len = strlen (real_old), strncasematch (real_old, real_new, len))
&& real_new[len] == '\\')
SetLastError (ERROR_INVALID_PARAMETER);
else if (MoveFileEx (real_old.get_win32 (), real_new.get_win32 (),
MOVEFILE_REPLACE_EXISTING))
res = 0;
else if ((lasterr = unlink_nt (real_new)))
{
SetLastError (lasterr);
syscall_printf ("Can't remove target file/dir, %E");
}
else if (MoveFile (real_old, real_new))
res = 0;
done:
if (res)
{
__seterrno ();
/* Reset R/O attributes if neccessary. */
if (real_new.has_attribute (FILE_ATTRIBUTE_READONLY))
SetFileAttributes (real_new, real_new);
goto out;
}
else
{
/* make the new file have the permissions of the old one */
DWORD attr = real_old;
#ifdef HIDDEN_DOT_FILES
char *c = strrchr (real_old.get_win32 (), '\\');
if ((c && c[1] == '.') || *real_old.get_win32 () == '.')
attr &= ~FILE_ATTRIBUTE_HIDDEN;
c = strrchr (real_new.get_win32 (), '\\');
if ((c && c[1] == '.') || *real_new.get_win32 () == '.')
attr |= FILE_ATTRIBUTE_HIDDEN;
#endif
SetFileAttributes (real_new, attr);
/* Shortcut hack, No. 2, part 2 */
/* if the new filename was an existing shortcut, remove it now if the
new filename is equal to the shortcut name without .lnk suffix. */
if (lnk_suffix)
if (RtlEqualUnicodeString (oldpc.get_nt_native_path (),
newpc.get_nt_native_path (),
TRUE)
&& old_explicit_suffix != new_explicit_suffix)
{
*lnk_suffix = '.';
unlink_nt (real_new);
newpc.check (newpath, PC_SYM_NOFOLLOW);
if (RtlEqualUnicodeString (oldpc.get_nt_native_path (),
newpc.get_nt_native_path (),
TRUE))
{
res = 0;
goto out;
}
}
/* Shortcut hack, No. 3, part 2 */
/* If a file with the given name exists, it must be deleted after the
symlink has been renamed. Otherwise we end up with two files of
the same name in the directory, one file "newpath", which already
exited before rename has been called, and one file "newpath.lnk",
which is the result of the rename operation. */
else if (no_lnk_file_exists)
else if (oldpc.is_lnk_symlink ())
{
if (!newpc.is_lnk_symlink ()
&& !RtlEqualUnicodePathSuffix (newpc.get_nt_native_path (),
L".lnk", TRUE))
{
rename_append_suffix (new2pc, newpath, nlen, ".lnk");
removepc = &newpc;
}
}
else if (oldpc.is_binary ())
{
lnk_suffix = strrchr (real_new.get_win32 (), '.');
*lnk_suffix = '\0';
unlink_nt (real_new);
if (!RtlEqualUnicodePathSuffix (newpc.get_nt_native_path (),
L".exe", TRUE))
{
rename_append_suffix (new2pc, newpath, nlen, ".exe");
removepc = &newpc;
}
}
else
{
if ((RtlEqualUnicodePathSuffix (newpc.get_nt_native_path (),
L".lnk", TRUE)
|| RtlEqualUnicodePathSuffix (newpc.get_nt_native_path (),
L".exe", TRUE))
&& !new_explicit_suffix)
{
new2pc.check (newpath, PC_SYM_NOFOLLOW, stat_suffixes);
newpc.get_nt_native_path ()->Length -= 4 * sizeof (WCHAR);
if (newpc.is_binary () || newpc.is_lnk_symlink ())
removepc = &new2pc;
}
}
}
dstpc = (removepc == &newpc) ? &new2pc : &newpc;
/* DELETE is required to rename a file. */
status = NtOpenFile (&fh, DELETE, oldpc.get_object_attr (attr, sec_none_nih),
&io, FILE_SHARE_VALID_FLAGS, FILE_OPEN_FOR_BACKUP_INTENT);
if (!NT_SUCCESS (status))
{
__seterrno_from_nt_status (status);
goto out;
}
size = sizeof (FILE_RENAME_INFORMATION)
+ dstpc->get_nt_native_path ()->Length;
pfri = (PFILE_RENAME_INFORMATION) alloca (size);
pfri->ReplaceIfExists = TRUE;
pfri->RootDirectory = NULL;
pfri->FileNameLength = dstpc->get_nt_native_path ()->Length;
memcpy (&pfri->FileName, dstpc->get_nt_native_path ()->Buffer,
pfri->FileNameLength);
status = NtSetInformationFile (fh, &io, pfri, size, FileRenameInformation);
if (NT_SUCCESS (status))
{
if (removepc)
unlink_nt (*removepc);
res = 0;
}
else
__seterrno_from_nt_status (status);
NtClose (fh);
syscall_printf ("%d = rename (%s, %s)", res, (char *) real_old,
(char *) real_new);
out:
syscall_printf ("%d = rename (%s, %s)", res, oldpath, newpath);
return res;
}