2020 lines
56 KiB
C++
2020 lines
56 KiB
C++
/* fhandler_disk_file.cc
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Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
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2005, 2006, 2007, 2008 Red Hat, Inc.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#include "winsup.h"
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#include <unistd.h>
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#include <stdlib.h>
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#include <sys/cygwin.h>
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#include <sys/acl.h>
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#include <sys/statvfs.h>
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#include <signal.h>
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#include "cygerrno.h"
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#include "perprocess.h"
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#include "security.h"
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#include "cygwin/version.h"
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#include "path.h"
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#include "fhandler.h"
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#include "dtable.h"
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#include "cygheap.h"
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#include "shared_info.h"
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#include "pinfo.h"
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#include "ntdll.h"
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#include <assert.h>
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#include <ctype.h>
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#include <winioctl.h>
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#define _COMPILING_NEWLIB
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#include <dirent.h>
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class __DIR_mounts
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{
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int count;
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const char *parent_dir;
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int parent_dir_len;
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UNICODE_STRING mounts[MAX_MOUNTS];
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bool found[MAX_MOUNTS + 2];
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UNICODE_STRING cygdrive;
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#define __DIR_PROC (MAX_MOUNTS)
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#define __DIR_CYGDRIVE (MAX_MOUNTS+1)
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__ino64_t eval_ino (int idx)
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{
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__ino64_t ino = 0;
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char fname[parent_dir_len + mounts[idx].Length + 2];
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struct __stat64 st;
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char *c = stpcpy (fname, parent_dir);
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if (c[- 1] != '/')
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*c++ = '/';
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sys_wcstombs (c, mounts[idx].Length + 1,
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mounts[idx].Buffer, mounts[idx].Length / sizeof (WCHAR));
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path_conv pc (fname, PC_SYM_NOFOLLOW | PC_POSIX);
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if (!stat_worker (pc, &st))
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ino = st.st_ino;
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return ino;
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}
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public:
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__DIR_mounts (const char *posix_path)
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: parent_dir (posix_path)
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{
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parent_dir_len = strlen (parent_dir);
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count = mount_table->get_mounts_here (parent_dir, parent_dir_len, mounts,
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&cygdrive);
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rewind ();
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}
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~__DIR_mounts ()
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{
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for (int i = 0; i < count; ++i)
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RtlFreeUnicodeString (&mounts[i]);
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RtlFreeUnicodeString (&cygdrive);
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}
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__ino64_t check_mount (PUNICODE_STRING fname, __ino64_t ino,
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bool eval = true)
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{
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if (parent_dir_len == 1) /* root dir */
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{
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UNICODE_STRING proc;
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RtlInitUnicodeString (&proc, L"proc");
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if (RtlEqualUnicodeString (fname, &proc, TRUE))
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{
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found[__DIR_PROC] = true;
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return 2;
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}
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if (fname->Length / sizeof (WCHAR) == mount_table->cygdrive_len - 2
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&& RtlEqualUnicodeString (fname, &cygdrive, TRUE))
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{
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found[__DIR_CYGDRIVE] = true;
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return 2;
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}
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}
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for (int i = 0; i < count; ++i)
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if (RtlEqualUnicodeString (fname, &mounts[i], TRUE))
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{
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found[i] = true;
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return eval ? eval_ino (i) : 1;
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}
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return ino;
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}
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__ino64_t check_missing_mount (PUNICODE_STRING retname = NULL)
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{
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for (int i = 0; i < count; ++i)
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if (!found[i])
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{
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found[i] = true;
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if (retname)
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{
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*retname = mounts[i];
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return eval_ino (i);
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}
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return 1;
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}
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if (parent_dir_len == 1) /* root dir */
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{
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if (!found[__DIR_PROC])
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{
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found[__DIR_PROC] = true;
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if (retname)
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RtlInitUnicodeString (retname, L"proc");
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return 2;
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}
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if (!found[__DIR_CYGDRIVE])
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{
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found[__DIR_CYGDRIVE] = true;
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if (cygdrive.Length > 0)
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{
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if (retname)
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*retname = cygdrive;
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return 2;
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}
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}
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}
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return 0;
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}
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void rewind () { memset (found, 0, sizeof found); }
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};
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static inline bool
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is_volume_mountpoint (POBJECT_ATTRIBUTES attr)
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{
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bool ret = false;
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IO_STATUS_BLOCK io;
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HANDLE reph;
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if (NT_SUCCESS (NtOpenFile (&reph, READ_CONTROL, attr, &io,
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FILE_SHARE_VALID_FLAGS,
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FILE_OPEN_FOR_BACKUP_INTENT
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| FILE_OPEN_REPARSE_POINT)))
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{
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PREPARSE_DATA_BUFFER rp = (PREPARSE_DATA_BUFFER)
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alloca (MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
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if (NT_SUCCESS (NtFsControlFile (reph, NULL, NULL, NULL,
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&io, FSCTL_GET_REPARSE_POINT, NULL, 0,
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(LPVOID) rp, MAXIMUM_REPARSE_DATA_BUFFER_SIZE))
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&& rp->ReparseTag == IO_REPARSE_TAG_MOUNT_POINT
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&& rp->SymbolicLinkReparseBuffer.PrintNameLength == 0)
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ret = true;
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NtClose (reph);
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}
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return ret;
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}
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static inline __ino64_t
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get_ino_by_handle (HANDLE hdl)
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{
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IO_STATUS_BLOCK io;
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FILE_INTERNAL_INFORMATION pfai;
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if (NT_SUCCESS (NtQueryInformationFile (hdl, &io, &pfai, sizeof pfai,
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FileInternalInformation)))
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return pfai.FileId.QuadPart;
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return 0;
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}
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unsigned __stdcall
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path_conv::ndisk_links (DWORD nNumberOfLinks)
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{
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if (!isdir () || isremote ())
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return nNumberOfLinks;
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OBJECT_ATTRIBUTES attr;
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IO_STATUS_BLOCK io;
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HANDLE fh;
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if (!NT_SUCCESS (NtOpenFile (&fh, SYNCHRONIZE | FILE_LIST_DIRECTORY,
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get_object_attr (attr, sec_none_nih),
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&io, FILE_SHARE_VALID_FLAGS,
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FILE_SYNCHRONOUS_IO_NONALERT
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| FILE_OPEN_FOR_BACKUP_INTENT
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| FILE_DIRECTORY_FILE)))
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return nNumberOfLinks;
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unsigned count = 0;
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bool first = true;
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PFILE_DIRECTORY_INFORMATION fdibuf = (PFILE_DIRECTORY_INFORMATION)
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alloca (65536);
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__DIR_mounts *dir = new __DIR_mounts (normalized_path);
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while (NT_SUCCESS (NtQueryDirectoryFile (fh, NULL, NULL, 0, &io, fdibuf,
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65536, FileDirectoryInformation,
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FALSE, NULL, first)))
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{
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if (first)
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{
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first = false;
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/* All directories have . and .. as their first entries.
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If . is not present as first entry, we're on a drive's
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root direcotry, which doesn't have these entries. */
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if (fdibuf->FileNameLength != 2 || fdibuf->FileName[0] != L'.')
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count = 2;
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}
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for (PFILE_DIRECTORY_INFORMATION pfdi = fdibuf;
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pfdi;
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pfdi = (PFILE_DIRECTORY_INFORMATION)
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(pfdi->NextEntryOffset ? (PBYTE) pfdi + pfdi->NextEntryOffset
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: NULL))
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{
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switch (pfdi->FileAttributes
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& (FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_REPARSE_POINT))
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{
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case FILE_ATTRIBUTE_DIRECTORY:
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/* Just a directory */
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++count;
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break;
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case FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_REPARSE_POINT:
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/* Volume mount point or symlink to directory */
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{
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UNICODE_STRING fname;
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RtlInitCountedUnicodeString (&fname, pfdi->FileName,
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pfdi->FileNameLength);
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InitializeObjectAttributes (&attr, &fname,
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OBJ_CASE_INSENSITIVE, fh, NULL);
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if (is_volume_mountpoint (&attr))
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++count;
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}
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break;
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default:
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break;
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}
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UNICODE_STRING fname;
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RtlInitCountedUnicodeString (&fname, pfdi->FileName,
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pfdi->FileNameLength);
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dir->check_mount (&fname, 0, false);
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}
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}
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while (dir->check_missing_mount ())
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++count;
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NtClose (fh);
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delete dir;
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return count;
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}
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inline bool
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path_conv::isgood_inode (__ino64_t ino) const
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{
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/* We can't trust remote inode numbers of only 32 bit. That means,
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all remote inode numbers when running under NT4, as well as remote NT4
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NTFS, as well as shares of Samba version < 3.0.
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The known exception are SFU NFS shares, which return the valid 32 bit
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inode number from the remote file system unchanged. */
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return hasgood_inode () && (ino > UINT32_MAX || !isremote () || fs_is_nfs ());
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}
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int __stdcall
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fhandler_base::fstat_by_handle (struct __stat64 *buf)
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{
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NTSTATUS status;
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IO_STATUS_BLOCK io;
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/* The entries potentially contain a name of MAX_PATH wide characters. */
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const DWORD fai_size = (NAME_MAX + 1) * sizeof (WCHAR)
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+ sizeof (FILE_ALL_INFORMATION);
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PFILE_ALL_INFORMATION pfai = (PFILE_ALL_INFORMATION) alloca (fai_size);
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status = NtQueryInformationFile (get_handle (), &io, pfai, fai_size,
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FileAllInformation);
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if (NT_SUCCESS (status))
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{
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/* If the change time is 0, it's a file system which doesn't
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support a change timestamp. In that case use the LastWriteTime
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entry, as in other calls to fstat_helper. */
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if (pc.is_rep_symlink ())
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pfai->BasicInformation.FileAttributes &= ~FILE_ATTRIBUTE_DIRECTORY;
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pc.file_attributes (pfai->BasicInformation.FileAttributes);
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return fstat_helper (buf,
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pfai->BasicInformation.ChangeTime.QuadPart
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? *(FILETIME *) &pfai->BasicInformation.ChangeTime
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: *(FILETIME *) &pfai->BasicInformation.LastWriteTime,
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*(FILETIME *) &pfai->BasicInformation.LastAccessTime,
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*(FILETIME *) &pfai->BasicInformation.LastWriteTime,
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*(FILETIME *) &pfai->BasicInformation.CreationTime,
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get_dev (),
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pfai->StandardInformation.EndOfFile.QuadPart,
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pfai->StandardInformation.AllocationSize.QuadPart,
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pfai->InternalInformation.FileId.QuadPart,
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pfai->StandardInformation.NumberOfLinks,
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pfai->BasicInformation.FileAttributes);
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}
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debug_printf ("%p = NtQueryInformationFile(%S)",
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status, pc.get_nt_native_path ());
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return -1;
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}
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int __stdcall
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fhandler_base::fstat_by_name (struct __stat64 *buf)
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{
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NTSTATUS status;
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OBJECT_ATTRIBUTES attr;
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IO_STATUS_BLOCK io;
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UNICODE_STRING dirname;
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UNICODE_STRING basename;
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HANDLE dir;
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const DWORD fdi_size = (NAME_MAX + 1) * sizeof (WCHAR)
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+ sizeof (FILE_ID_BOTH_DIR_INFORMATION);
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const DWORD fvi_size = (NAME_MAX + 1) * sizeof (WCHAR)
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+ sizeof (FILE_FS_VOLUME_INFORMATION);
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PFILE_ID_BOTH_DIR_INFORMATION pfdi = (PFILE_ID_BOTH_DIR_INFORMATION)
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alloca (fdi_size);
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PFILE_FS_VOLUME_INFORMATION pfvi = (PFILE_FS_VOLUME_INFORMATION)
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alloca (fvi_size);
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LARGE_INTEGER FileId;
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if (!pc.exists ())
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{
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debug_printf ("already determined that pc does not exist");
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set_errno (ENOENT);
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return -1;
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}
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RtlSplitUnicodePath (pc.get_nt_native_path (), &dirname, &basename);
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InitializeObjectAttributes (&attr, &dirname, OBJ_CASE_INSENSITIVE,
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NULL, NULL);
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if (!NT_SUCCESS (status = NtOpenFile (&dir, SYNCHRONIZE | FILE_LIST_DIRECTORY,
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&attr, &io, FILE_SHARE_VALID_FLAGS,
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FILE_SYNCHRONOUS_IO_NONALERT
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| FILE_OPEN_FOR_BACKUP_INTENT
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| FILE_DIRECTORY_FILE)))
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{
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debug_printf ("%p = NtOpenFile(%S)", status, pc.get_nt_native_path ());
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goto too_bad;
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}
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if (wincap.has_fileid_dirinfo ()
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&& NT_SUCCESS (status = NtQueryDirectoryFile (dir, NULL, NULL, 0, &io,
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pfdi, fdi_size,
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FileIdBothDirectoryInformation,
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TRUE, &basename, TRUE)))
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FileId = pfdi->FileId;
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else if (NT_SUCCESS (status = NtQueryDirectoryFile (dir, NULL, NULL, 0, &io,
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pfdi, fdi_size,
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FileBothDirectoryInformation,
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TRUE, &basename, TRUE)))
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FileId.QuadPart = 0; /* get_ino is called in fstat_helper. */
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if (!NT_SUCCESS (status))
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{
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debug_printf ("%p = NtQueryDirectoryFile(%S)", status,
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pc.get_nt_native_path ());
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NtClose (dir);
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goto too_bad;
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}
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status = NtQueryVolumeInformationFile (dir, &io, pfvi, fvi_size,
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FileFsVolumeInformation);
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if (!NT_SUCCESS (status))
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{
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debug_printf ("%p = NtQueryVolumeInformationFile(%S)",
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status, pc.get_nt_native_path ());
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pfvi->VolumeSerialNumber = 0;
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}
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NtClose (dir);
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/* If the change time is 0, it's a file system which doesn't
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support a change timestamp. In that case use the LastWriteTime
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entry, as in other calls to fstat_helper. */
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if (pc.is_rep_symlink ())
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pfdi->FileAttributes &= ~FILE_ATTRIBUTE_DIRECTORY;
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pc.file_attributes (pfdi->FileAttributes);
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return fstat_helper (buf,
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pfdi->ChangeTime.QuadPart ?
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*(FILETIME *) &pfdi->ChangeTime :
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*(FILETIME *) &pfdi->LastWriteTime,
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*(FILETIME *) &pfdi->LastAccessTime,
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*(FILETIME *) &pfdi->LastWriteTime,
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*(FILETIME *) &pfdi->CreationTime,
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pfvi->VolumeSerialNumber,
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pfdi->EndOfFile.QuadPart,
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pfdi->AllocationSize.QuadPart,
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pfdi->FileId.QuadPart,
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1,
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pfdi->FileAttributes);
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too_bad:
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LARGE_INTEGER ft;
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/* Arbitrary value: 2006-12-01 */
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RtlSecondsSince1970ToTime (1164931200L, &ft);
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return fstat_helper (buf,
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*(FILETIME *) &ft,
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*(FILETIME *) &ft,
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*(FILETIME *) &ft,
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*(FILETIME *) &ft,
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0,
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0ULL,
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-1LL,
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0ULL,
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1,
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pc.file_attributes ());
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}
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int __stdcall
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fhandler_base::fstat_fs (struct __stat64 *buf)
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{
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int res = -1;
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int oret;
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int open_flags = O_RDONLY | O_BINARY;
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if (get_handle ())
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{
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if (!nohandle () && !is_fs_special ())
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res = fstat_by_handle (buf);
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if (res)
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res = fstat_by_name (buf);
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return res;
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}
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query_open (query_read_attributes);
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oret = open_fs (open_flags, 0);
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if (oret)
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{
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/* We now have a valid handle, regardless of the "nohandle" state.
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Since fhandler_base::open only calls CloseHandle if !nohandle,
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we have to set it to false before calling close and restore
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the state afterwards. */
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res = fstat_by_handle (buf);
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bool no_handle = nohandle ();
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nohandle (false);
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close_fs ();
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nohandle (no_handle);
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set_io_handle (NULL);
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}
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if (res)
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res = fstat_by_name (buf);
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return res;
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}
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/* The ftChangeTime is taken from the NTFS ChangeTime entry, if reading
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the file information using NtQueryInformationFile succeeded. If not,
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it's faked using the LastWriteTime entry from GetFileInformationByHandle
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or FindFirstFile. We're deliberatly not using the creation time anymore
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to simplify interaction with native Windows applications which choke on
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creation times >= access or write times.
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Note that the dwFileAttributes member of the file information evaluated
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in the calling function is used here, not the pc.fileattr member, since
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the latter might be old and not reflect the actual state of the file. */
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int __stdcall
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fhandler_base::fstat_helper (struct __stat64 *buf,
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FILETIME ftChangeTime,
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FILETIME ftLastAccessTime,
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FILETIME ftLastWriteTime,
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FILETIME ftCreationTime,
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DWORD dwVolumeSerialNumber,
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ULONGLONG nFileSize,
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LONGLONG nAllocSize,
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ULONGLONG nFileIndex,
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DWORD nNumberOfLinks,
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DWORD dwFileAttributes)
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{
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IO_STATUS_BLOCK st;
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FILE_COMPRESSION_INFORMATION fci;
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to_timestruc_t (&ftLastAccessTime, &buf->st_atim);
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to_timestruc_t (&ftLastWriteTime, &buf->st_mtim);
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to_timestruc_t (&ftChangeTime, &buf->st_ctim);
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to_timestruc_t (&ftCreationTime, &buf->st_birthtim);
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buf->st_dev = dwVolumeSerialNumber;
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buf->st_size = (_off64_t) nFileSize;
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/* The number of links to a directory includes the
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number of subdirectories in the directory, since all
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those subdirectories point to it.
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This is too slow on remote drives, so we do without it.
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Setting the count to 2 confuses `find (1)' command. So
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let's try it with `1' as link count. */
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buf->st_nlink = pc.ndisk_links (nNumberOfLinks);
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/* Enforce namehash as inode number on untrusted file systems. */
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if (pc.isgood_inode (nFileIndex))
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buf->st_ino = (__ino64_t) nFileIndex;
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else
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|
buf->st_ino = get_ino ();
|
|
|
|
buf->st_blksize = PREFERRED_IO_BLKSIZE;
|
|
|
|
if (nAllocSize >= 0LL)
|
|
/* A successful NtQueryInformationFile returns the allocation size
|
|
correctly for compressed and sparse files as well. */
|
|
buf->st_blocks = (nAllocSize + S_BLKSIZE - 1) / S_BLKSIZE;
|
|
else if (::has_attribute (dwFileAttributes, FILE_ATTRIBUTE_COMPRESSED
|
|
| FILE_ATTRIBUTE_SPARSE_FILE)
|
|
&& get_handle () && !is_fs_special ()
|
|
&& !NtQueryInformationFile (get_handle (), &st, (PVOID) &fci,
|
|
sizeof fci, FileCompressionInformation))
|
|
/* Otherwise we request the actual amount of bytes allocated for
|
|
compressed and sparsed files. */
|
|
buf->st_blocks = (fci.CompressedFileSize.QuadPart + S_BLKSIZE - 1)
|
|
/ S_BLKSIZE;
|
|
else
|
|
/* Otherwise compute no. of blocks from file size. */
|
|
buf->st_blocks = (buf->st_size + S_BLKSIZE - 1) / S_BLKSIZE;
|
|
|
|
buf->st_mode = 0;
|
|
/* Using a side effect: get_file_attibutes checks for
|
|
directory. This is used, to set S_ISVTX, if needed. */
|
|
if (pc.isdir ())
|
|
buf->st_mode = S_IFDIR;
|
|
else if (pc.issymlink ())
|
|
{
|
|
buf->st_size = pc.get_symlink_length ();
|
|
/* symlinks are everything for everyone! */
|
|
buf->st_mode = S_IFLNK | S_IRWXU | S_IRWXG | S_IRWXO;
|
|
get_file_attribute (get_handle (), pc, NULL,
|
|
&buf->st_uid, &buf->st_gid);
|
|
goto done;
|
|
}
|
|
else if (pc.issocket ())
|
|
buf->st_mode = S_IFSOCK;
|
|
|
|
if (!get_file_attribute (is_fs_special () && !pc.issocket ()
|
|
? NULL : get_handle (), pc,
|
|
&buf->st_mode, &buf->st_uid, &buf->st_gid))
|
|
{
|
|
/* If read-only attribute is set, modify ntsec return value */
|
|
if (::has_attribute (dwFileAttributes, FILE_ATTRIBUTE_READONLY)
|
|
&& !pc.isdir () && !pc.issymlink ())
|
|
buf->st_mode &= ~(S_IWUSR | S_IWGRP | S_IWOTH);
|
|
|
|
if (buf->st_mode & S_IFMT)
|
|
/* nothing */;
|
|
else if (!is_fs_special ())
|
|
buf->st_mode |= S_IFREG;
|
|
else
|
|
{
|
|
buf->st_dev = dev ();
|
|
buf->st_mode = dev ().mode;
|
|
buf->st_size = 0;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
buf->st_mode |= STD_RBITS;
|
|
|
|
if (!::has_attribute (dwFileAttributes, FILE_ATTRIBUTE_READONLY))
|
|
buf->st_mode |= STD_WBITS;
|
|
/* | S_IWGRP | S_IWOTH; we don't give write to group etc */
|
|
|
|
if (pc.isdir ())
|
|
buf->st_mode |= S_IFDIR | STD_WBITS | STD_XBITS;
|
|
else if (buf->st_mode & S_IFMT)
|
|
/* nothing */;
|
|
else if (is_fs_special ())
|
|
{
|
|
buf->st_dev = dev ();
|
|
buf->st_mode = dev ().mode;
|
|
buf->st_size = 0;
|
|
}
|
|
else
|
|
{
|
|
buf->st_mode |= S_IFREG;
|
|
if (pc.exec_state () == dont_know_if_executable)
|
|
{
|
|
UNICODE_STRING same;
|
|
OBJECT_ATTRIBUTES attr;
|
|
HANDLE h;
|
|
IO_STATUS_BLOCK io;
|
|
|
|
RtlInitUnicodeString (&same, L"");
|
|
InitializeObjectAttributes (&attr, &same, 0, get_handle (), NULL);
|
|
if (NT_SUCCESS (NtOpenFile (&h, FILE_READ_DATA, &attr, &io,
|
|
FILE_SHARE_VALID_FLAGS, 0)))
|
|
{
|
|
LARGE_INTEGER off = { QuadPart:0LL };
|
|
char magic[3];
|
|
|
|
if (NT_SUCCESS (NtReadFile (h, NULL, NULL, NULL, &io, magic,
|
|
3, &off, NULL))
|
|
&& has_exec_chars (magic, io.Information))
|
|
{
|
|
pc.set_exec ();
|
|
buf->st_mode |= STD_XBITS;
|
|
}
|
|
NtClose (h);
|
|
}
|
|
}
|
|
}
|
|
if (pc.exec_state () == is_executable)
|
|
buf->st_mode |= STD_XBITS;
|
|
|
|
/* This fakes the permissions of all files to match the current umask. */
|
|
buf->st_mode &= ~(cygheap->umask);
|
|
}
|
|
|
|
done:
|
|
syscall_printf ("0 = fstat (, %p) st_atime=%x st_size=%D, st_mode=%p, st_ino=%D, sizeof=%d",
|
|
buf, buf->st_atime, buf->st_size, buf->st_mode,
|
|
buf->st_ino, sizeof (*buf));
|
|
return 0;
|
|
}
|
|
|
|
int __stdcall
|
|
fhandler_disk_file::fstat (struct __stat64 *buf)
|
|
{
|
|
return fstat_fs (buf);
|
|
}
|
|
|
|
int __stdcall
|
|
fhandler_disk_file::fstatvfs (struct statvfs *sfs)
|
|
{
|
|
int ret = -1, opened = 0;
|
|
NTSTATUS status;
|
|
IO_STATUS_BLOCK io;
|
|
const size_t fvi_size = sizeof (FILE_FS_VOLUME_INFORMATION)
|
|
+ (NAME_MAX + 1) * sizeof (WCHAR);
|
|
PFILE_FS_VOLUME_INFORMATION pfvi = (PFILE_FS_VOLUME_INFORMATION)
|
|
alloca (fvi_size);
|
|
const size_t fai_size = sizeof (FILE_FS_ATTRIBUTE_INFORMATION)
|
|
+ (NAME_MAX + 1) * sizeof (WCHAR);
|
|
PFILE_FS_ATTRIBUTE_INFORMATION pfai = (PFILE_FS_ATTRIBUTE_INFORMATION)
|
|
alloca (fai_size);
|
|
FILE_FS_FULL_SIZE_INFORMATION full_fsi;
|
|
FILE_FS_SIZE_INFORMATION fsi;
|
|
HANDLE fh = get_handle ();
|
|
|
|
if (!fh)
|
|
{
|
|
OBJECT_ATTRIBUTES attr;
|
|
opened = NT_SUCCESS (NtOpenFile (&fh, READ_CONTROL,
|
|
pc.get_object_attr (attr, sec_none_nih),
|
|
&io, FILE_SHARE_VALID_FLAGS,
|
|
FILE_OPEN_FOR_BACKUP_INTENT));
|
|
if (!opened)
|
|
{
|
|
/* Can't open file. Try again with parent dir. */
|
|
UNICODE_STRING dirname;
|
|
RtlSplitUnicodePath (pc.get_nt_native_path (), &dirname, NULL);
|
|
attr.ObjectName = &dirname;
|
|
opened = NT_SUCCESS (NtOpenFile (&fh, READ_CONTROL, &attr, &io,
|
|
FILE_SHARE_VALID_FLAGS,
|
|
FILE_OPEN_FOR_BACKUP_INTENT));
|
|
if (!opened)
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/* Get basic volume information. */
|
|
status = NtQueryVolumeInformationFile (fh, &io, pfvi, fvi_size,
|
|
FileFsVolumeInformation);
|
|
if (!NT_SUCCESS (status))
|
|
{
|
|
__seterrno_from_nt_status (status);
|
|
goto out;
|
|
}
|
|
status = NtQueryVolumeInformationFile (fh, &io, pfai, fai_size,
|
|
FileFsAttributeInformation);
|
|
if (!NT_SUCCESS (status))
|
|
{
|
|
__seterrno_from_nt_status (status);
|
|
goto out;
|
|
}
|
|
sfs->f_files = ULONG_MAX;
|
|
sfs->f_ffree = ULONG_MAX;
|
|
sfs->f_favail = ULONG_MAX;
|
|
sfs->f_fsid = pfvi->VolumeSerialNumber;
|
|
sfs->f_flag = pfai->FileSystemAttributes;
|
|
sfs->f_namemax = pfai->MaximumComponentNameLength;
|
|
/* Get allocation related information. Try to get "full" information
|
|
first, which is only available since W2K. If that fails, try to
|
|
retrieve normal allocation information. */
|
|
status = NtQueryVolumeInformationFile (fh, &io, &full_fsi, sizeof full_fsi,
|
|
FileFsFullSizeInformation);
|
|
if (NT_SUCCESS (status))
|
|
{
|
|
sfs->f_bsize = full_fsi.BytesPerSector * full_fsi.SectorsPerAllocationUnit;
|
|
sfs->f_frsize = sfs->f_bsize;
|
|
sfs->f_blocks = full_fsi.TotalAllocationUnits.LowPart;
|
|
sfs->f_bfree = full_fsi.ActualAvailableAllocationUnits.LowPart;
|
|
sfs->f_bavail = full_fsi.CallerAvailableAllocationUnits.LowPart;
|
|
if (sfs->f_bfree > sfs->f_bavail)
|
|
{
|
|
/* Quotas active. We can't trust TotalAllocationUnits. */
|
|
NTFS_VOLUME_DATA_BUFFER nvdb;
|
|
|
|
status = NtFsControlFile (fh, NULL, NULL, NULL, &io,
|
|
FSCTL_GET_NTFS_VOLUME_DATA,
|
|
NULL, 0, &nvdb, sizeof nvdb);
|
|
if (!NT_SUCCESS (status))
|
|
debug_printf ("%p = NtFsControlFile(%S, FSCTL_GET_NTFS_VOLUME_DATA)",
|
|
status, pc.get_nt_native_path ());
|
|
else
|
|
sfs->f_blocks = nvdb.TotalClusters.QuadPart;
|
|
}
|
|
ret = 0;
|
|
}
|
|
else
|
|
{
|
|
status = NtQueryVolumeInformationFile (fh, &io, &fsi, sizeof fsi,
|
|
FileFsSizeInformation);
|
|
if (!NT_SUCCESS (status))
|
|
{
|
|
__seterrno_from_nt_status (status);
|
|
goto out;
|
|
}
|
|
sfs->f_bsize = fsi.BytesPerSector * fsi.SectorsPerAllocationUnit;
|
|
sfs->f_frsize = sfs->f_bsize;
|
|
sfs->f_blocks = fsi.TotalAllocationUnits.LowPart;
|
|
sfs->f_bfree = fsi.AvailableAllocationUnits.LowPart;
|
|
sfs->f_bavail = sfs->f_bfree;
|
|
ret = 0;
|
|
}
|
|
out:
|
|
if (opened)
|
|
NtClose (fh);
|
|
syscall_printf ("%d = fstatvfs (%s, %p)", ret, get_name (), sfs);
|
|
return ret;
|
|
}
|
|
|
|
int __stdcall
|
|
fhandler_disk_file::fchmod (mode_t mode)
|
|
{
|
|
extern int chmod_device (path_conv& pc, mode_t mode);
|
|
int res = -1;
|
|
int oret = 0;
|
|
|
|
if (pc.is_fs_special ())
|
|
return chmod_device (pc, mode);
|
|
|
|
if (!get_handle ())
|
|
{
|
|
query_open (query_write_control);
|
|
if (!(oret = open (O_BINARY, 0)))
|
|
{
|
|
/* Need WRITE_DAC|WRITE_OWNER to write ACLs. */
|
|
if (allow_ntsec && pc.has_acls ())
|
|
return -1;
|
|
/* Otherwise FILE_WRITE_ATTRIBUTES is sufficient. */
|
|
query_open (query_write_attributes);
|
|
if (!(oret = open (O_BINARY, 0)))
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
if (allow_ntsec && pc.has_acls ())
|
|
{
|
|
if (pc.isdir ())
|
|
mode |= S_IFDIR;
|
|
if (!set_file_attribute (get_handle (), pc,
|
|
ILLEGAL_UID, ILLEGAL_GID, mode)
|
|
&& allow_ntsec)
|
|
res = 0;
|
|
}
|
|
|
|
/* if the mode we want has any write bits set, we can't be read only. */
|
|
if (mode & (S_IWUSR | S_IWGRP | S_IWOTH))
|
|
pc &= (DWORD) ~FILE_ATTRIBUTE_READONLY;
|
|
else
|
|
pc |= (DWORD) FILE_ATTRIBUTE_READONLY;
|
|
if (mode & S_IFSOCK)
|
|
pc |= (DWORD) FILE_ATTRIBUTE_SYSTEM;
|
|
|
|
IO_STATUS_BLOCK io;
|
|
FILE_BASIC_INFORMATION fbi;
|
|
fbi.CreationTime.QuadPart = fbi.LastAccessTime.QuadPart
|
|
= fbi.LastWriteTime.QuadPart = fbi.ChangeTime.QuadPart = 0LL;
|
|
fbi.FileAttributes = pc.file_attributes () ?: FILE_ATTRIBUTE_NORMAL;
|
|
NTSTATUS status = NtSetInformationFile (get_handle (), &io, &fbi, sizeof fbi,
|
|
FileBasicInformation);
|
|
if (!NT_SUCCESS (status))
|
|
__seterrno_from_nt_status (status);
|
|
else if (!allow_ntsec || !pc.has_acls ())
|
|
/* Correct NTFS security attributes have higher priority */
|
|
res = 0;
|
|
|
|
if (oret)
|
|
close_fs ();
|
|
|
|
return res;
|
|
}
|
|
|
|
int __stdcall
|
|
fhandler_disk_file::fchown (__uid32_t uid, __gid32_t gid)
|
|
{
|
|
int oret = 0;
|
|
|
|
if (!pc.has_acls () || !allow_ntsec)
|
|
{
|
|
/* fake - if not supported, pretend we're like win95
|
|
where it just works */
|
|
return 0;
|
|
}
|
|
|
|
if (!get_handle ())
|
|
{
|
|
query_open (query_write_control);
|
|
if (!(oret = fhandler_disk_file::open (O_BINARY, 0)))
|
|
return -1;
|
|
}
|
|
|
|
mode_t attrib = 0;
|
|
if (pc.isdir ())
|
|
attrib |= S_IFDIR;
|
|
int res = get_file_attribute (get_handle (), pc, &attrib, NULL, NULL);
|
|
if (!res)
|
|
{
|
|
/* Typical Windows default ACLs can contain permissions for one
|
|
group, while being owned by another user/group. The permission
|
|
bits returned above are pretty much useless then. Creating a
|
|
new ACL with these useless permissions results in a potentially
|
|
broken symlink. So what we do here is to set the underlying
|
|
permissions of symlinks to a sensible value which allows the
|
|
world to read the symlink and only the new owner to change it. */
|
|
if (pc.issymlink ())
|
|
attrib = S_IFLNK | STD_RBITS | STD_WBITS;
|
|
res = set_file_attribute (get_handle (), pc, uid, gid, attrib);
|
|
}
|
|
if (oret)
|
|
close_fs ();
|
|
|
|
return res;
|
|
}
|
|
|
|
int _stdcall
|
|
fhandler_disk_file::facl (int cmd, int nentries, __aclent32_t *aclbufp)
|
|
{
|
|
int res = -1;
|
|
int oret = 0;
|
|
|
|
if (!pc.has_acls () || !allow_ntsec)
|
|
{
|
|
cant_access_acl:
|
|
switch (cmd)
|
|
{
|
|
struct __stat64 st;
|
|
|
|
case SETACL:
|
|
/* Open for writing required to be able to set ctime
|
|
(even though setting the ACL is just pretended). */
|
|
if (!get_handle ())
|
|
oret = open (O_WRONLY | O_BINARY, 0);
|
|
res = 0;
|
|
break;
|
|
case GETACL:
|
|
if (!aclbufp)
|
|
set_errno (EFAULT);
|
|
else if (nentries < MIN_ACL_ENTRIES)
|
|
set_errno (ENOSPC);
|
|
else
|
|
{
|
|
if (!get_handle ())
|
|
{
|
|
query_open (query_read_attributes);
|
|
oret = open (O_BINARY, 0);
|
|
}
|
|
if ((!oret && !fstat_by_handle (&st))
|
|
|| !fstat_by_name (&st))
|
|
{
|
|
aclbufp[0].a_type = USER_OBJ;
|
|
aclbufp[0].a_id = st.st_uid;
|
|
aclbufp[0].a_perm = (st.st_mode & S_IRWXU) >> 6;
|
|
aclbufp[1].a_type = GROUP_OBJ;
|
|
aclbufp[1].a_id = st.st_gid;
|
|
aclbufp[1].a_perm = (st.st_mode & S_IRWXG) >> 3;
|
|
aclbufp[2].a_type = OTHER_OBJ;
|
|
aclbufp[2].a_id = ILLEGAL_GID;
|
|
aclbufp[2].a_perm = st.st_mode & S_IRWXO;
|
|
aclbufp[3].a_type = CLASS_OBJ;
|
|
aclbufp[3].a_id = ILLEGAL_GID;
|
|
aclbufp[3].a_perm = S_IRWXU | S_IRWXG | S_IRWXO;
|
|
res = MIN_ACL_ENTRIES;
|
|
}
|
|
}
|
|
break;
|
|
case GETACLCNT:
|
|
res = MIN_ACL_ENTRIES;
|
|
break;
|
|
default:
|
|
set_errno (EINVAL);
|
|
break;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (!get_handle ())
|
|
{
|
|
query_open (cmd == SETACL ? query_write_control : query_read_control);
|
|
if (!(oret = open (O_BINARY, 0)))
|
|
{
|
|
if (cmd == GETACL || cmd == GETACLCNT)
|
|
goto cant_access_acl;
|
|
return -1;
|
|
}
|
|
}
|
|
switch (cmd)
|
|
{
|
|
case SETACL:
|
|
if (!aclsort32 (nentries, 0, aclbufp))
|
|
{
|
|
bool rw = false;
|
|
res = setacl (get_handle (), pc, nentries, aclbufp, rw);
|
|
if (rw)
|
|
{
|
|
IO_STATUS_BLOCK io;
|
|
FILE_BASIC_INFORMATION fbi;
|
|
fbi.CreationTime.QuadPart
|
|
= fbi.LastAccessTime.QuadPart
|
|
= fbi.LastWriteTime.QuadPart
|
|
= fbi.ChangeTime.QuadPart = 0LL;
|
|
fbi.FileAttributes = (pc.file_attributes ()
|
|
& ~FILE_ATTRIBUTE_READONLY)
|
|
?: FILE_ATTRIBUTE_NORMAL;
|
|
NtSetInformationFile (get_handle (), &io, &fbi, sizeof fbi,
|
|
FileBasicInformation);
|
|
}
|
|
}
|
|
break;
|
|
case GETACL:
|
|
if (!aclbufp)
|
|
set_errno(EFAULT);
|
|
else
|
|
res = getacl (get_handle (), pc, nentries, aclbufp);
|
|
break;
|
|
case GETACLCNT:
|
|
res = getacl (get_handle (), pc, 0, NULL);
|
|
break;
|
|
default:
|
|
set_errno (EINVAL);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (oret)
|
|
close_fs ();
|
|
|
|
return res;
|
|
}
|
|
|
|
ssize_t
|
|
fhandler_disk_file::fgetxattr (const char *name, void *value, size_t size)
|
|
{
|
|
if (pc.is_fs_special ())
|
|
{
|
|
set_errno (ENOTSUP);
|
|
return -1;
|
|
}
|
|
return read_ea (get_handle (), pc, name, (char *) value, size);
|
|
}
|
|
|
|
int
|
|
fhandler_disk_file::fsetxattr (const char *name, const void *value, size_t size,
|
|
int flags)
|
|
{
|
|
if (pc.is_fs_special ())
|
|
{
|
|
set_errno (ENOTSUP);
|
|
return -1;
|
|
}
|
|
return write_ea (get_handle (), pc, name, (const char *) value, size, flags);
|
|
}
|
|
|
|
int
|
|
fhandler_disk_file::fadvise (_off64_t offset, _off64_t length, int advice)
|
|
{
|
|
if (advice < POSIX_FADV_NORMAL || advice > POSIX_FADV_NOREUSE)
|
|
{
|
|
set_errno (EINVAL);
|
|
return -1;
|
|
}
|
|
|
|
/* Windows only supports advice flags for the whole file. We're using
|
|
a simplified test here so that we don't have to ask for the actual
|
|
file size. Length == 0 means all bytes starting at offset anyway.
|
|
So we only actually follow the advice, if it's given for offset == 0. */
|
|
if (offset != 0)
|
|
return 0;
|
|
|
|
/* We only support normal and sequential mode for now. Everything which
|
|
is not POSIX_FADV_SEQUENTIAL is treated like POSIX_FADV_NORMAL. */
|
|
if (advice != POSIX_FADV_SEQUENTIAL)
|
|
advice = POSIX_FADV_NORMAL;
|
|
|
|
IO_STATUS_BLOCK io;
|
|
FILE_MODE_INFORMATION fmi;
|
|
NTSTATUS status = NtQueryInformationFile (get_handle (), &io,
|
|
&fmi, sizeof fmi,
|
|
FileModeInformation);
|
|
if (!NT_SUCCESS (status))
|
|
__seterrno_from_nt_status (status);
|
|
else
|
|
{
|
|
fmi.Mode &= ~FILE_SEQUENTIAL_ONLY;
|
|
if (advice == POSIX_FADV_SEQUENTIAL)
|
|
fmi.Mode |= FILE_SEQUENTIAL_ONLY;
|
|
status = NtSetInformationFile (get_handle (), &io, &fmi, sizeof fmi,
|
|
FileModeInformation);
|
|
if (NT_SUCCESS (status))
|
|
return 0;
|
|
__seterrno_from_nt_status (status);
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
int
|
|
fhandler_disk_file::ftruncate (_off64_t length, bool allow_truncate)
|
|
{
|
|
int res = -1;
|
|
|
|
if (length < 0 || !get_handle ())
|
|
set_errno (EINVAL);
|
|
else if (pc.isdir ())
|
|
set_errno (EISDIR);
|
|
else if (!(get_access () & GENERIC_WRITE))
|
|
set_errno (EBADF);
|
|
else
|
|
{
|
|
NTSTATUS status;
|
|
IO_STATUS_BLOCK io;
|
|
FILE_STANDARD_INFORMATION fsi;
|
|
FILE_END_OF_FILE_INFORMATION feofi;
|
|
|
|
status = NtQueryInformationFile (get_handle (), &io, &fsi, sizeof fsi,
|
|
FileStandardInformation);
|
|
if (!NT_SUCCESS (status))
|
|
{
|
|
__seterrno_from_nt_status (status);
|
|
return -1;
|
|
}
|
|
|
|
/* If called through posix_fallocate, silently succeed if length
|
|
is less than the file's actual length. */
|
|
if (!allow_truncate && length < fsi.EndOfFile.QuadPart)
|
|
return 0;
|
|
|
|
feofi.EndOfFile.QuadPart = length;
|
|
/* Create sparse files only when called through ftruncate, not when
|
|
called through posix_fallocate. */
|
|
if (allow_truncate
|
|
&& (pc.fs_flags () & FILE_SUPPORTS_SPARSE_FILES)
|
|
&& length >= fsi.EndOfFile.QuadPart + (128 * 1024))
|
|
{
|
|
status = NtFsControlFile (get_handle (), NULL, NULL, NULL, &io,
|
|
FSCTL_SET_SPARSE, NULL, 0, NULL, 0);
|
|
syscall_printf ("%p = NtFsControlFile(%S, FSCTL_SET_SPARSE)",
|
|
status, pc.get_nt_native_path ());
|
|
}
|
|
status = NtSetInformationFile (get_handle (), &io,
|
|
&feofi, sizeof feofi,
|
|
FileEndOfFileInformation);
|
|
if (!NT_SUCCESS (status))
|
|
__seterrno_from_nt_status (status);
|
|
else
|
|
res = 0;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
int
|
|
fhandler_disk_file::link (const char *newpath)
|
|
{
|
|
extern bool allow_winsymlinks;
|
|
|
|
path_conv newpc (newpath, PC_SYM_NOFOLLOW | PC_POSIX,
|
|
transparent_exe ? stat_suffixes : NULL);
|
|
if (newpc.error)
|
|
{
|
|
set_errno (newpc.case_clash ? ECASECLASH : newpc.error);
|
|
return -1;
|
|
}
|
|
|
|
if (newpc.exists ())
|
|
{
|
|
syscall_printf ("file '%S' exists?", newpc.get_nt_native_path ());
|
|
set_errno (EEXIST);
|
|
return -1;
|
|
}
|
|
|
|
char new_buf[strlen (newpath) + 5];
|
|
if (!newpc.error && !newpc.case_clash)
|
|
{
|
|
if (allow_winsymlinks && pc.is_lnk_special ())
|
|
{
|
|
/* Shortcut hack. */
|
|
stpcpy (stpcpy (new_buf, newpath), ".lnk");
|
|
newpath = new_buf;
|
|
newpc.check (newpath, PC_SYM_NOFOLLOW);
|
|
}
|
|
else if (!pc.isdir ()
|
|
&& pc.is_binary ()
|
|
&& !RtlEqualUnicodePathSuffix (newpc.get_nt_native_path (),
|
|
L".exe", TRUE))
|
|
{
|
|
/* Executable hack. */
|
|
stpcpy (stpcpy (new_buf, newpath), ".exe");
|
|
newpath = new_buf;
|
|
newpc.check (newpath, PC_SYM_NOFOLLOW);
|
|
}
|
|
}
|
|
|
|
HANDLE fh;
|
|
NTSTATUS status;
|
|
OBJECT_ATTRIBUTES attr;
|
|
IO_STATUS_BLOCK io;
|
|
status = NtOpenFile (&fh, READ_CONTROL,
|
|
pc.get_object_attr (attr, sec_none_nih), &io,
|
|
FILE_SHARE_VALID_FLAGS,
|
|
FILE_OPEN_FOR_BACKUP_INTENT | FILE_OPEN_REPARSE_POINT);
|
|
if (!NT_SUCCESS (status))
|
|
{
|
|
__seterrno_from_nt_status (status);
|
|
return -1;
|
|
}
|
|
PUNICODE_STRING tgt = newpc.get_nt_native_path ();
|
|
ULONG size = sizeof (FILE_LINK_INFORMATION) + tgt->Length;
|
|
PFILE_LINK_INFORMATION pfli = (PFILE_LINK_INFORMATION) alloca (size);
|
|
pfli->ReplaceIfExists = FALSE;
|
|
pfli->RootDirectory = NULL;
|
|
memcpy (pfli->FileName, tgt->Buffer, pfli->FileNameLength = tgt->Length);
|
|
status = NtSetInformationFile (fh, &io, pfli, size, FileLinkInformation);
|
|
NtClose (fh);
|
|
if (!NT_SUCCESS (status))
|
|
{
|
|
if (status == STATUS_INVALID_DEVICE_REQUEST)
|
|
{
|
|
/* FS doesn't support hard links. Try to copy file. */
|
|
WCHAR pcw[pc.get_nt_native_path ()->Length + 1];
|
|
WCHAR newpcw[newpc.get_nt_native_path ()->Length + 1];
|
|
if (!CopyFileW (pc.get_wide_win32_path (pcw),
|
|
newpc.get_wide_win32_path (newpcw), TRUE))
|
|
{
|
|
__seterrno ();
|
|
return -1;
|
|
}
|
|
if (!allow_winsymlinks && pc.is_lnk_special ())
|
|
SetFileAttributesW (newpcw, pc.file_attributes ()
|
|
| FILE_ATTRIBUTE_SYSTEM
|
|
| FILE_ATTRIBUTE_READONLY);
|
|
}
|
|
else
|
|
{
|
|
__seterrno_from_nt_status (status);
|
|
return -1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
fhandler_disk_file::utimes (const struct timeval *tvp)
|
|
{
|
|
return utimes_fs (tvp);
|
|
}
|
|
|
|
int
|
|
fhandler_base::utimes_fs (const struct timeval *tvp)
|
|
{
|
|
LARGE_INTEGER lastaccess, lastwrite;
|
|
struct timeval tmp[2];
|
|
bool closeit = false;
|
|
|
|
if (!get_handle ())
|
|
{
|
|
query_open (query_write_attributes);
|
|
if (!open_fs (O_BINARY, 0))
|
|
{
|
|
/* It's documented in MSDN that FILE_WRITE_ATTRIBUTES is sufficient
|
|
to change the timestamps. Unfortunately it's not sufficient for a
|
|
remote HPFS which requires GENERIC_WRITE, so we just retry to open
|
|
for writing, though this fails for R/O files of course. */
|
|
query_open (no_query);
|
|
if (!open_fs (O_WRONLY | O_BINARY, 0))
|
|
{
|
|
syscall_printf ("Opening file failed");
|
|
return -1;
|
|
}
|
|
}
|
|
closeit = true;
|
|
}
|
|
|
|
gettimeofday (&tmp[0], 0);
|
|
if (!tvp)
|
|
{
|
|
tmp[1] = tmp[0];
|
|
tvp = tmp;
|
|
}
|
|
timeval_to_filetime (&tvp[0], (FILETIME *) &lastaccess);
|
|
timeval_to_filetime (&tvp[1], (FILETIME *) &lastwrite);
|
|
debug_printf ("incoming lastaccess %08x %08x", tvp[0].tv_sec, tvp[0].tv_usec);
|
|
|
|
IO_STATUS_BLOCK io;
|
|
FILE_BASIC_INFORMATION fbi;
|
|
fbi.CreationTime.QuadPart = 0LL;
|
|
fbi.LastAccessTime = lastaccess;
|
|
fbi.LastWriteTime = lastwrite;
|
|
fbi.ChangeTime.QuadPart = 0LL;
|
|
fbi.FileAttributes = 0;
|
|
NTSTATUS status = NtSetInformationFile (get_handle (), &io, &fbi, sizeof fbi,
|
|
FileBasicInformation);
|
|
if (closeit)
|
|
close_fs ();
|
|
/* Opening a directory on a 9x share from a NT machine works(!), but
|
|
then NtSetInformationFile fails with STATUS_NOT_SUPPORTED. Oh well... */
|
|
if (!NT_SUCCESS (status) && status != STATUS_NOT_SUPPORTED)
|
|
{
|
|
__seterrno_from_nt_status (status);
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
fhandler_disk_file::fhandler_disk_file () :
|
|
fhandler_base ()
|
|
{
|
|
}
|
|
|
|
fhandler_disk_file::fhandler_disk_file (path_conv &pc) :
|
|
fhandler_base ()
|
|
{
|
|
set_name (pc);
|
|
}
|
|
|
|
int
|
|
fhandler_disk_file::open (int flags, mode_t mode)
|
|
{
|
|
return open_fs (flags, mode);
|
|
}
|
|
|
|
int
|
|
fhandler_base::open_fs (int flags, mode_t mode)
|
|
{
|
|
if (pc.case_clash && flags & O_CREAT)
|
|
{
|
|
debug_printf ("case clash detected");
|
|
set_errno (ECASECLASH);
|
|
return 0;
|
|
}
|
|
|
|
/* Unfortunately NT allows to open directories for writing, but that's
|
|
disallowed according to SUSv3. */
|
|
if (pc.isdir () && (flags & O_ACCMODE) != O_RDONLY)
|
|
{
|
|
set_errno (EISDIR);
|
|
return 0;
|
|
}
|
|
|
|
int res = fhandler_base::open (flags | O_DIROPEN, mode);
|
|
if (!res)
|
|
goto out;
|
|
|
|
/* This is for file systems known for having a buggy CreateFile call
|
|
which might return a valid HANDLE without having actually opened
|
|
the file.
|
|
The only known file system to date is the SUN NFS Solstice Client 3.1
|
|
which returns a valid handle when trying to open a file in a nonexistent
|
|
directory. */
|
|
if (pc.has_buggy_open () && !pc.exists ())
|
|
{
|
|
debug_printf ("Buggy open detected.");
|
|
close_fs ();
|
|
set_errno (ENOENT);
|
|
return 0;
|
|
}
|
|
|
|
if (pc.hasgood_inode ())
|
|
ino = get_ino_by_handle (get_handle ());
|
|
/* A unique ID is necessary to recognize fhandler entries which are
|
|
duplicated by dup(2) or fork(2). */
|
|
AllocateLocallyUniqueId ((PLUID) &unique_id);
|
|
|
|
out:
|
|
syscall_printf ("%d = fhandler_disk_file::open (%S, %p)", res,
|
|
pc.get_nt_native_path (), flags);
|
|
return res;
|
|
}
|
|
|
|
ssize_t __stdcall
|
|
fhandler_disk_file::pread (void *buf, size_t count, _off64_t offset)
|
|
{
|
|
ssize_t res;
|
|
_off64_t curpos = lseek (0, SEEK_CUR);
|
|
if (curpos < 0 || lseek (offset, SEEK_SET) < 0)
|
|
res = -1;
|
|
else
|
|
{
|
|
size_t tmp_count = count;
|
|
read (buf, tmp_count);
|
|
if (lseek (curpos, SEEK_SET) >= 0)
|
|
res = (ssize_t) tmp_count;
|
|
else
|
|
res = -1;
|
|
}
|
|
debug_printf ("%d = pread (%p, %d, %d)\n", res, buf, count, offset);
|
|
return res;
|
|
}
|
|
|
|
ssize_t __stdcall
|
|
fhandler_disk_file::pwrite (void *buf, size_t count, _off64_t offset)
|
|
{
|
|
int res;
|
|
_off64_t curpos = lseek (0, SEEK_CUR);
|
|
if (curpos < 0 || lseek (offset, SEEK_SET) < 0)
|
|
res = curpos;
|
|
else
|
|
{
|
|
res = (ssize_t) write (buf, count);
|
|
if (lseek (curpos, SEEK_SET) < 0)
|
|
res = -1;
|
|
}
|
|
debug_printf ("%d = pwrite (%p, %d, %d)\n", res, buf, count, offset);
|
|
return res;
|
|
}
|
|
|
|
int
|
|
fhandler_disk_file::mkdir (mode_t mode)
|
|
{
|
|
int res = -1;
|
|
SECURITY_ATTRIBUTES sa = sec_none_nih;
|
|
security_descriptor sd;
|
|
|
|
if (allow_ntsec && has_acls ())
|
|
set_security_attribute (S_IFDIR | ((mode & 07777) & ~cygheap->umask),
|
|
&sa, sd);
|
|
|
|
NTSTATUS status;
|
|
HANDLE dir;
|
|
OBJECT_ATTRIBUTES attr;
|
|
IO_STATUS_BLOCK io;
|
|
ULONG fattr = FILE_ATTRIBUTE_DIRECTORY;
|
|
status = NtCreateFile (&dir, FILE_LIST_DIRECTORY | SYNCHRONIZE,
|
|
pc.get_object_attr (attr, sa), &io, NULL,
|
|
fattr, FILE_SHARE_VALID_FLAGS, FILE_CREATE,
|
|
FILE_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT
|
|
| FILE_OPEN_FOR_BACKUP_INTENT,
|
|
NULL, 0);
|
|
if (NT_SUCCESS (status))
|
|
{
|
|
NtClose (dir);
|
|
res = 0;
|
|
}
|
|
else
|
|
__seterrno_from_nt_status (status);
|
|
|
|
return res;
|
|
}
|
|
|
|
int
|
|
fhandler_disk_file::rmdir ()
|
|
{
|
|
extern NTSTATUS unlink_nt (path_conv &pc);
|
|
|
|
if (!pc.isdir ())
|
|
{
|
|
set_errno (ENOTDIR);
|
|
return -1;
|
|
}
|
|
if (!pc.exists ())
|
|
{
|
|
set_errno (ENOENT);
|
|
return -1;
|
|
}
|
|
|
|
NTSTATUS status = unlink_nt (pc);
|
|
|
|
/* Check for existence of remote dirs after trying to delete them.
|
|
Two reasons:
|
|
- Sometimes SMB indicates failure when it really succeeds.
|
|
- Removeing a directory on a samba drive doesn't return an error if the
|
|
directory can't be removed because it's not empty. */
|
|
if (isremote ())
|
|
{
|
|
OBJECT_ATTRIBUTES attr;
|
|
FILE_BASIC_INFORMATION fbi;
|
|
|
|
if (NT_SUCCESS (NtQueryAttributesFile
|
|
(pc.get_object_attr (attr, sec_none_nih), &fbi)))
|
|
status = STATUS_DIRECTORY_NOT_EMPTY;
|
|
else
|
|
status = STATUS_SUCCESS;
|
|
}
|
|
if (!NT_SUCCESS (status))
|
|
{
|
|
__seterrno_from_nt_status (status);
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* This is the minimal number of entries which fit into the readdir cache.
|
|
The number of bytes allocated by the cache is determined by this number,
|
|
To tune caching, just tweak this number. To get a feeling for the size,
|
|
the size of the readdir cache is DIR_NUM_ENTRIES * 624 + 4 bytes. */
|
|
|
|
#define DIR_NUM_ENTRIES 100 /* Cache size 62404 bytes */
|
|
|
|
#define DIR_BUF_SIZE (DIR_NUM_ENTRIES \
|
|
* (sizeof (FILE_ID_BOTH_DIR_INFORMATION) \
|
|
+ (NAME_MAX + 1) * sizeof (WCHAR)))
|
|
|
|
struct __DIR_cache
|
|
{
|
|
char __cache[DIR_BUF_SIZE]; /* W2K needs this buffer 8 byte aligned. */
|
|
ULONG __pos;
|
|
};
|
|
|
|
#define d_cachepos(d) (((__DIR_cache *) (d)->__d_dirname)->__pos)
|
|
#define d_cache(d) (((__DIR_cache *) (d)->__d_dirname)->__cache)
|
|
|
|
#define d_mounts(d) ((__DIR_mounts *) (d)->__d_internal)
|
|
|
|
DIR *
|
|
fhandler_disk_file::opendir (int fd)
|
|
{
|
|
DIR *dir;
|
|
DIR *res = NULL;
|
|
|
|
if (!pc.isdir ())
|
|
set_errno (ENOTDIR);
|
|
else if ((dir = (DIR *) malloc (sizeof (DIR))) == NULL)
|
|
set_errno (ENOMEM);
|
|
else if ((dir->__d_dirname = (char *) malloc ( sizeof (struct __DIR_cache)))
|
|
== NULL)
|
|
{
|
|
set_errno (ENOMEM);
|
|
goto free_dir;
|
|
}
|
|
else if ((dir->__d_dirent =
|
|
(struct dirent *) malloc (sizeof (struct dirent))) == NULL)
|
|
{
|
|
set_errno (ENOMEM);
|
|
goto free_dirname;
|
|
}
|
|
else
|
|
{
|
|
cygheap_fdnew cfd;
|
|
if (cfd < 0 && fd < 0)
|
|
goto free_dirent;
|
|
|
|
dir->__d_dirent->__d_version = __DIRENT_VERSION;
|
|
dir->__d_cookie = __DIRENT_COOKIE;
|
|
dir->__handle = INVALID_HANDLE_VALUE;
|
|
dir->__d_position = 0;
|
|
dir->__flags = (get_name ()[0] == '/' && get_name ()[1] == '\0')
|
|
? dirent_isroot : 0;
|
|
dir->__d_internal = (unsigned) new __DIR_mounts (get_name ());
|
|
d_cachepos (dir) = 0;
|
|
|
|
if (!pc.iscygdrive ())
|
|
{
|
|
if (fd < 0)
|
|
{
|
|
/* opendir() case. Initialize with given directory name and
|
|
NULL directory handle. */
|
|
OBJECT_ATTRIBUTES attr;
|
|
NTSTATUS status;
|
|
IO_STATUS_BLOCK io;
|
|
|
|
status = NtOpenFile (&get_handle (),
|
|
SYNCHRONIZE | FILE_LIST_DIRECTORY,
|
|
pc.get_object_attr (attr, sec_none_nih),
|
|
&io, FILE_SHARE_VALID_FLAGS,
|
|
FILE_SYNCHRONOUS_IO_NONALERT
|
|
| FILE_OPEN_FOR_BACKUP_INTENT
|
|
| FILE_DIRECTORY_FILE);
|
|
if (!NT_SUCCESS (status))
|
|
{
|
|
__seterrno_from_nt_status (status);
|
|
goto free_mounts;
|
|
}
|
|
}
|
|
|
|
/* FileIdBothDirectoryInformation is apparently unsupported on
|
|
XP when accessing directories on UDF. When trying to use it
|
|
so, NtQueryDirectoryFile returns with STATUS_ACCESS_VIOLATION.
|
|
It's not clear if the call isn't also unsupported on other
|
|
OS/FS combinations (say, Win2K/CDFS or so). Instead of
|
|
testing in readdir for yet another error code, let's use
|
|
FileIdBothDirectoryInformation only on filesystems supporting
|
|
persistent ACLs, FileBothDirectoryInformation otherwise. */
|
|
if (pc.hasgood_inode ())
|
|
{
|
|
dir->__flags |= dirent_set_d_ino;
|
|
if (wincap.has_fileid_dirinfo ())
|
|
dir->__flags |= dirent_get_d_ino;
|
|
}
|
|
}
|
|
if (fd >= 0)
|
|
dir->__d_fd = fd;
|
|
else
|
|
{
|
|
/* Filling cfd with `this' (aka storing this in the file
|
|
descriptor table should only happen after it's clear that
|
|
opendir doesn't fail, otherwise we end up cfree'ing the
|
|
fhandler twice, once in opendir() in dir.cc, the second
|
|
time on exit. Nasty, nasty... */
|
|
cfd = this;
|
|
dir->__d_fd = cfd;
|
|
if (pc.iscygdrive ())
|
|
cfd->nohandle (true);
|
|
}
|
|
set_close_on_exec (true);
|
|
dir->__fh = this;
|
|
res = dir;
|
|
}
|
|
|
|
syscall_printf ("%p = opendir (%s)", res, get_name ());
|
|
return res;
|
|
|
|
free_mounts:
|
|
delete d_mounts (dir);
|
|
free_dirent:
|
|
free (dir->__d_dirent);
|
|
free_dirname:
|
|
free (dir->__d_dirname);
|
|
free_dir:
|
|
free (dir);
|
|
return res;
|
|
}
|
|
|
|
__ino64_t __stdcall
|
|
readdir_get_ino (const char *path, bool dot_dot)
|
|
{
|
|
char *fname;
|
|
struct __stat64 st;
|
|
HANDLE hdl;
|
|
OBJECT_ATTRIBUTES attr;
|
|
IO_STATUS_BLOCK io;
|
|
__ino64_t ino = 0;
|
|
|
|
if (dot_dot)
|
|
{
|
|
fname = (char *) alloca (strlen (path) + 4);
|
|
char *c = stpcpy (fname, path);
|
|
if (c[-1] != '/')
|
|
*c++ = '/';
|
|
strcpy (c, "..");
|
|
path = fname;
|
|
}
|
|
path_conv pc (path, PC_SYM_NOFOLLOW | PC_POSIX);
|
|
if (pc.isspecial ())
|
|
{
|
|
if (!stat_worker (pc, &st))
|
|
ino = st.st_ino;
|
|
}
|
|
else if (!pc.hasgood_inode ())
|
|
ino = hash_path_name (0, pc.get_nt_native_path ());
|
|
else if (NT_SUCCESS (NtOpenFile (&hdl, READ_CONTROL,
|
|
pc.get_object_attr (attr, sec_none_nih),
|
|
&io, FILE_SHARE_VALID_FLAGS,
|
|
FILE_OPEN_FOR_BACKUP_INTENT
|
|
| (pc.is_rep_symlink ()
|
|
? FILE_OPEN_REPARSE_POINT : 0))))
|
|
{
|
|
ino = get_ino_by_handle (hdl);
|
|
NtClose (hdl);
|
|
}
|
|
return ino;
|
|
}
|
|
|
|
int
|
|
fhandler_disk_file::readdir_helper (DIR *dir, dirent *de, DWORD w32_err,
|
|
DWORD attr, PUNICODE_STRING fname)
|
|
{
|
|
if (w32_err)
|
|
{
|
|
bool added = false;
|
|
if ((de->d_ino = d_mounts (dir)->check_missing_mount (fname)))
|
|
added = true;
|
|
if (!added)
|
|
return geterrno_from_win_error (w32_err);
|
|
|
|
attr = 0;
|
|
dir->__flags &= ~dirent_set_d_ino;
|
|
}
|
|
|
|
/* Check for directory reparse point. These are potential volume mount
|
|
points which have another inode than the underlying directory. */
|
|
if ((attr & (FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_REPARSE_POINT))
|
|
== (FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_REPARSE_POINT))
|
|
{
|
|
HANDLE reph;
|
|
OBJECT_ATTRIBUTES attr;
|
|
IO_STATUS_BLOCK io;
|
|
|
|
InitializeObjectAttributes (&attr, fname, OBJ_CASE_INSENSITIVE,
|
|
get_handle (), NULL);
|
|
if (is_volume_mountpoint (&attr)
|
|
&& (NT_SUCCESS (NtOpenFile (&reph, READ_CONTROL, &attr, &io,
|
|
FILE_SHARE_VALID_FLAGS,
|
|
FILE_OPEN_FOR_BACKUP_INTENT))))
|
|
{
|
|
de->d_ino = get_ino_by_handle (reph);
|
|
NtClose (reph);
|
|
}
|
|
}
|
|
|
|
/* Check for Windows shortcut. If it's a Cygwin or U/WIN
|
|
symlink, drop the .lnk suffix. */
|
|
if ((attr & FILE_ATTRIBUTE_READONLY) && fname->Length > 4 * sizeof (WCHAR))
|
|
{
|
|
UNICODE_STRING uname;
|
|
UNICODE_STRING lname;
|
|
|
|
RtlInitCountedUnicodeString (&uname,
|
|
fname->Buffer
|
|
+ fname->Length / sizeof (WCHAR) - 4,
|
|
4 * sizeof (WCHAR));
|
|
RtlInitCountedUnicodeString (&lname, (PWCHAR) L".lnk",
|
|
4 * sizeof (WCHAR));
|
|
|
|
if (RtlEqualUnicodeString (&uname, &lname, TRUE))
|
|
{
|
|
UNICODE_STRING dirname = *pc.get_nt_native_path ();
|
|
dirname.Buffer += 4; /* Skip leading \??\ */
|
|
dirname.Length -= 4 * sizeof (WCHAR);
|
|
UNICODE_STRING fbuf;
|
|
ULONG len = dirname.Length + fname->Length + 2 * sizeof (WCHAR);
|
|
|
|
RtlInitEmptyUnicodeString (&fbuf, (PCWSTR) alloca (len), len);
|
|
RtlCopyUnicodeString (&fbuf, &dirname);
|
|
RtlAppendUnicodeToString (&fbuf, L"\\");
|
|
RtlAppendUnicodeStringToString (&fbuf, fname);
|
|
path_conv fpath (&fbuf, PC_SYM_NOFOLLOW);
|
|
if (fpath.issymlink () || fpath.is_fs_special ())
|
|
fname->Length -= 4 * sizeof (WCHAR);
|
|
}
|
|
}
|
|
|
|
/* Transform special DOS chars back to normal. */
|
|
for (USHORT i = 0; i < fname->Length / sizeof (WCHAR); ++i)
|
|
if ((fname->Buffer[i] & 0xff00) == 0xf000)
|
|
fname->Buffer[i] &= 0xff;
|
|
#if 0
|
|
if (pc.isencoded ())
|
|
{
|
|
char tmp[NAME_MAX + 1];
|
|
sys_wcstombs (tmp, NAME_MAX + 1, fname->Buffer,
|
|
fname->Length / sizeof (WCHAR));
|
|
fnunmunge (de->d_name, tmp);
|
|
}
|
|
else
|
|
#endif
|
|
sys_wcstombs (de->d_name, NAME_MAX + 1, fname->Buffer,
|
|
fname->Length / sizeof (WCHAR));
|
|
|
|
if (dir->__d_position == 0 && !strcmp (de->d_name, "."))
|
|
dir->__flags |= dirent_saw_dot;
|
|
else if (dir->__d_position == 1 && !strcmp (de->d_name, ".."))
|
|
dir->__flags |= dirent_saw_dot_dot;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
fhandler_disk_file::readdir (DIR *dir, dirent *de)
|
|
{
|
|
int res = 0;
|
|
NTSTATUS status = STATUS_SUCCESS;
|
|
PFILE_ID_BOTH_DIR_INFORMATION buf = NULL;
|
|
PWCHAR FileName;
|
|
IO_STATUS_BLOCK io;
|
|
UNICODE_STRING fname;
|
|
|
|
/* d_cachepos always refers to the next cache entry to use. If it's 0
|
|
we must reload the cache. */
|
|
if (d_cachepos (dir) == 0)
|
|
{
|
|
if ((dir->__flags & dirent_get_d_ino))
|
|
{
|
|
status = NtQueryDirectoryFile (get_handle (), NULL, NULL, 0, &io,
|
|
d_cache (dir), DIR_BUF_SIZE,
|
|
FileIdBothDirectoryInformation,
|
|
FALSE, NULL, dir->__d_position == 0);
|
|
/* FileIdBothDirectoryInformation isn't supported for remote drives
|
|
on NT4 and 2K systems, and it's also not supported on 2K at all,
|
|
when accessing network drives on any remote OS. We just fall
|
|
back to using a standard directory query in this case and note
|
|
this case using the dirent_get_d_ino flag. */
|
|
if (status == STATUS_INVALID_LEVEL
|
|
|| status == STATUS_INVALID_PARAMETER
|
|
|| status == STATUS_INVALID_INFO_CLASS)
|
|
dir->__flags &= ~dirent_get_d_ino;
|
|
/* Something weird happens on Samba up to version 3.0.21c, which is
|
|
fixed in 3.0.22. FileIdBothDirectoryInformation seems to work
|
|
nicely, but only up to the 128th entry in the directory. After
|
|
reaching this entry, the next call to NtQueryDirectoryFile
|
|
(FileIdBothDirectoryInformation) returns STATUS_INVALID_LEVEL.
|
|
Why should we care, we can just switch to
|
|
FileBothDirectoryInformation, isn't it? Nope! The next call to
|
|
NtQueryDirectoryFile(FileBothDirectoryInformation) actually
|
|
returns STATUS_NO_MORE_FILES, regardless how many files are left
|
|
unread in the directory. This does not happen when using
|
|
FileBothDirectoryInformation right from the start, but since
|
|
we can't decide whether the server we're talking with has this
|
|
bug or not, we end up serving Samba shares always in the slow
|
|
mode using FileBothDirectoryInformation. So, what we do here is
|
|
to implement the solution suggested by Andrew Tridgell, we just
|
|
reread all entries up to dir->d_position using
|
|
FileBothDirectoryInformation.
|
|
However, We do *not* mark this server as broken and fall back to
|
|
using FileBothDirectoryInformation further on. This would slow
|
|
down every access to such a server, even for directories under
|
|
128 entries. Also, bigger dirs only suffer from one additional
|
|
call per full directory scan, which shouldn't be too big a hit.
|
|
This can easily be changed if necessary. */
|
|
if (status == STATUS_INVALID_LEVEL && dir->__d_position)
|
|
{
|
|
d_cachepos (dir) = 0;
|
|
for (int cnt = 0; cnt < dir->__d_position; ++cnt)
|
|
{
|
|
if (d_cachepos (dir) == 0)
|
|
{
|
|
status = NtQueryDirectoryFile (get_handle (), NULL, NULL,
|
|
0, &io, d_cache (dir), DIR_BUF_SIZE,
|
|
FileBothDirectoryInformation,
|
|
FALSE, NULL, cnt == 0);
|
|
if (!NT_SUCCESS (status))
|
|
goto go_ahead;
|
|
}
|
|
buf = (PFILE_ID_BOTH_DIR_INFORMATION) (d_cache (dir)
|
|
+ d_cachepos (dir));
|
|
if (buf->NextEntryOffset == 0)
|
|
d_cachepos (dir) = 0;
|
|
else
|
|
d_cachepos (dir) += buf->NextEntryOffset;
|
|
}
|
|
goto go_ahead;
|
|
}
|
|
}
|
|
if (!(dir->__flags & dirent_get_d_ino))
|
|
status = NtQueryDirectoryFile (get_handle (), NULL, NULL, 0, &io,
|
|
d_cache (dir), DIR_BUF_SIZE,
|
|
FileBothDirectoryInformation,
|
|
FALSE, NULL, dir->__d_position == 0);
|
|
}
|
|
|
|
go_ahead:
|
|
|
|
if (!NT_SUCCESS (status))
|
|
debug_printf ("NtQueryDirectoryFile failed, status %p, win32 error %lu",
|
|
status, RtlNtStatusToDosError (status));
|
|
else
|
|
{
|
|
buf = (PFILE_ID_BOTH_DIR_INFORMATION) (d_cache (dir) + d_cachepos (dir));
|
|
if (buf->NextEntryOffset == 0)
|
|
d_cachepos (dir) = 0;
|
|
else
|
|
d_cachepos (dir) += buf->NextEntryOffset;
|
|
if ((dir->__flags & dirent_get_d_ino))
|
|
{
|
|
FileName = buf->FileName;
|
|
if ((dir->__flags & dirent_set_d_ino))
|
|
de->d_ino = buf->FileId.QuadPart;
|
|
}
|
|
else
|
|
FileName = ((PFILE_BOTH_DIR_INFORMATION) buf)->FileName;
|
|
RtlInitCountedUnicodeString (&fname, FileName, buf->FileNameLength);
|
|
de->d_ino = d_mounts (dir)->check_mount (&fname, de->d_ino);
|
|
if (de->d_ino == 0 && (dir->__flags & dirent_set_d_ino))
|
|
{
|
|
OBJECT_ATTRIBUTES attr;
|
|
|
|
if (dir->__d_position == 0 && buf->FileNameLength == 2
|
|
&& FileName[0] == '.')
|
|
de->d_ino = get_ino_by_handle (get_handle ());
|
|
else if (dir->__d_position == 1 && buf->FileNameLength == 4
|
|
&& FileName[0] == L'.' && FileName[1] == L'.')
|
|
if (!(dir->__flags & dirent_isroot))
|
|
de->d_ino = readdir_get_ino (get_name (), true);
|
|
else
|
|
de->d_ino = get_ino_by_handle (get_handle ());
|
|
else
|
|
{
|
|
HANDLE hdl;
|
|
|
|
InitializeObjectAttributes (&attr, &fname, OBJ_CASE_INSENSITIVE,
|
|
get_handle (), NULL);
|
|
if (NT_SUCCESS (NtOpenFile (&hdl, READ_CONTROL, &attr, &io,
|
|
FILE_SHARE_VALID_FLAGS,
|
|
FILE_OPEN_FOR_BACKUP_INTENT)))
|
|
{
|
|
de->d_ino = get_ino_by_handle (hdl);
|
|
NtClose (hdl);
|
|
}
|
|
}
|
|
/* Enforce namehash as inode number on untrusted file systems. */
|
|
if (!pc.isgood_inode (de->d_ino))
|
|
{
|
|
dir->__flags &= ~dirent_set_d_ino;
|
|
de->d_ino = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!(res = readdir_helper (dir, de, RtlNtStatusToDosError (status),
|
|
buf ? buf->FileAttributes : 0, &fname)))
|
|
dir->__d_position++;
|
|
else if (!(dir->__flags & dirent_saw_dot))
|
|
{
|
|
strcpy (de->d_name , ".");
|
|
de->d_ino = get_ino_by_handle (get_handle ());
|
|
dir->__d_position++;
|
|
dir->__flags |= dirent_saw_dot;
|
|
res = 0;
|
|
}
|
|
else if (!(dir->__flags & dirent_saw_dot_dot))
|
|
{
|
|
strcpy (de->d_name , "..");
|
|
if (!(dir->__flags & dirent_isroot))
|
|
de->d_ino = readdir_get_ino (get_name (), true);
|
|
else
|
|
de->d_ino = get_ino_by_handle (get_handle ());
|
|
dir->__d_position++;
|
|
dir->__flags |= dirent_saw_dot_dot;
|
|
res = 0;
|
|
}
|
|
|
|
syscall_printf ("%d = readdir (%p, %p) (%s)", res, dir, &de, res ? "***" : de->d_name);
|
|
return res;
|
|
}
|
|
|
|
_off64_t
|
|
fhandler_disk_file::telldir (DIR *dir)
|
|
{
|
|
return dir->__d_position;
|
|
}
|
|
|
|
void
|
|
fhandler_disk_file::seekdir (DIR *dir, _off64_t loc)
|
|
{
|
|
rewinddir (dir);
|
|
while (loc > dir->__d_position)
|
|
if (!::readdir (dir))
|
|
break;
|
|
}
|
|
|
|
void
|
|
fhandler_disk_file::rewinddir (DIR *dir)
|
|
{
|
|
d_cachepos (dir) = 0;
|
|
if (wincap.has_buggy_restart_scan () && isremote ())
|
|
{
|
|
/* This works around a W2K bug. The RestartScan parameter in calls
|
|
to NtQueryDirectoryFile on remote shares is ignored, thus
|
|
resulting in not being able to rewind on remote shares. By
|
|
reopening the directory, we get a fresh new directory pointer. */
|
|
UNICODE_STRING fname;
|
|
OBJECT_ATTRIBUTES attr;
|
|
NTSTATUS status;
|
|
IO_STATUS_BLOCK io;
|
|
HANDLE new_dir;
|
|
|
|
RtlInitUnicodeString (&fname, L"");
|
|
InitializeObjectAttributes (&attr, &fname, OBJ_CASE_INSENSITIVE,
|
|
get_handle (), NULL);
|
|
status = NtOpenFile (&new_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 (stat))
|
|
debug_printf ("Unable to reopen dir %s, NT error: %p",
|
|
get_name (), status);
|
|
else
|
|
{
|
|
NtClose (get_handle ());
|
|
set_io_handle (new_dir);
|
|
}
|
|
}
|
|
dir->__d_position = 0;
|
|
d_mounts (dir)->rewind ();
|
|
}
|
|
|
|
int
|
|
fhandler_disk_file::closedir (DIR *dir)
|
|
{
|
|
int res = 0;
|
|
NTSTATUS status;
|
|
|
|
delete d_mounts (dir);
|
|
if (!get_handle ())
|
|
/* ignore */;
|
|
else if (get_handle () == INVALID_HANDLE_VALUE)
|
|
{
|
|
set_errno (EBADF);
|
|
res = -1;
|
|
}
|
|
else if (!NT_SUCCESS (status = NtClose (get_handle ())))
|
|
{
|
|
__seterrno_from_nt_status (status);
|
|
res = -1;
|
|
}
|
|
syscall_printf ("%d = closedir (%p, %s)", res, dir, get_name ());
|
|
return res;
|
|
}
|
|
|
|
fhandler_cygdrive::fhandler_cygdrive () :
|
|
fhandler_disk_file (), ndrives (0), pdrive (NULL)
|
|
{
|
|
}
|
|
|
|
int
|
|
fhandler_cygdrive::open (int flags, mode_t mode)
|
|
{
|
|
if ((flags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
|
|
{
|
|
set_errno (EEXIST);
|
|
return 0;
|
|
}
|
|
if (flags & O_WRONLY)
|
|
{
|
|
set_errno (EISDIR);
|
|
return 0;
|
|
}
|
|
flags |= O_DIROPEN;
|
|
set_flags (flags);
|
|
nohandle (true);
|
|
return 1;
|
|
}
|
|
|
|
int
|
|
fhandler_cygdrive::close ()
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
#define DRVSZ sizeof ("x:\\")
|
|
void
|
|
fhandler_cygdrive::set_drives ()
|
|
{
|
|
const int len = 2 + 26 * DRVSZ;
|
|
char *p = const_cast<char *> (get_win32_name ());
|
|
pdrive = p;
|
|
ndrives = GetLogicalDriveStrings (len, p) / DRVSZ;
|
|
}
|
|
|
|
int
|
|
fhandler_cygdrive::fstat (struct __stat64 *buf)
|
|
{
|
|
fhandler_base::fstat (buf);
|
|
buf->st_ino = 2;
|
|
buf->st_mode = S_IFDIR | S_IXUSR | S_IXGRP | S_IXOTH;
|
|
if (!ndrives)
|
|
set_drives ();
|
|
char flptst[] = "X:";
|
|
int n = ndrives;
|
|
for (const char *p = pdrive; p && *p; p = strchr (p, '\0') + 1)
|
|
if (is_floppy ((flptst[0] = *p, flptst))
|
|
|| GetFileAttributes (p) == INVALID_FILE_ATTRIBUTES)
|
|
--n;
|
|
buf->st_nlink = n + 2;
|
|
return 0;
|
|
}
|
|
|
|
DIR *
|
|
fhandler_cygdrive::opendir (int fd)
|
|
{
|
|
DIR *dir;
|
|
|
|
dir = fhandler_disk_file::opendir (fd);
|
|
if (dir && !ndrives)
|
|
set_drives ();
|
|
|
|
return dir;
|
|
}
|
|
|
|
int
|
|
fhandler_cygdrive::readdir (DIR *dir, dirent *de)
|
|
{
|
|
char flptst[] = "X:";
|
|
|
|
while (true)
|
|
{
|
|
if (!pdrive || !*pdrive)
|
|
{
|
|
if (!(dir->__flags & dirent_saw_dot))
|
|
{
|
|
de->d_name[0] = '.';
|
|
de->d_name[1] = '\0';
|
|
de->d_ino = 2;
|
|
}
|
|
return ENMFILE;
|
|
}
|
|
if (!is_floppy ((flptst[0] = *pdrive, flptst))
|
|
&& GetFileAttributes (pdrive) != INVALID_FILE_ATTRIBUTES)
|
|
break;
|
|
pdrive = strchr (pdrive, '\0') + 1;
|
|
}
|
|
*de->d_name = cyg_tolower (*pdrive);
|
|
de->d_name[1] = '\0';
|
|
user_shared->warned_msdos = true;
|
|
de->d_ino = readdir_get_ino (pdrive, false);
|
|
dir->__d_position++;
|
|
pdrive = strchr (pdrive, '\0') + 1;
|
|
syscall_printf ("%p = readdir (%p) (%s)", &de, dir, de->d_name);
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
fhandler_cygdrive::rewinddir (DIR *dir)
|
|
{
|
|
pdrive = get_win32_name ();
|
|
dir->__d_position = 0;
|
|
}
|
|
|
|
int
|
|
fhandler_cygdrive::closedir (DIR *dir)
|
|
{
|
|
pdrive = get_win32_name ();
|
|
return 0;
|
|
}
|