329 lines
6.6 KiB
C++
329 lines
6.6 KiB
C++
/* dir.cc: Posix directory-related routines
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Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2006, 2007 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 <stdlib.h>
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#define _COMPILING_NEWLIB
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#include <dirent.h>
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#include "cygerrno.h"
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#include "security.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 "cygtls.h"
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extern "C" int
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dirfd (DIR *dir)
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{
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myfault efault;
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if (efault.faulted (EFAULT))
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return -1;
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if (dir->__d_cookie != __DIRENT_COOKIE)
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{
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set_errno (EBADF);
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syscall_printf ("-1 = dirfd (%p)", dir);
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return -1;
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}
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return dir->__d_fd;
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}
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/* Symbol kept for backward compatibility. Don't remove. Don't declare
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in public header file. */
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extern "C" DIR *
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__opendir_with_d_ino (const char *name)
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{
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return opendir (name);
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}
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/* opendir: POSIX 5.1.2.1 */
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extern "C" DIR *
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opendir (const char *name)
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{
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fhandler_base *fh;
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DIR *res;
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fh = build_fh_name (name, NULL, PC_SYM_FOLLOW);
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if (!fh)
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res = NULL;
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else if (fh->exists ())
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res = fh->opendir (-1);
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else
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{
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set_errno (ENOENT);
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res = NULL;
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}
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if (!res && fh)
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delete fh;
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return res;
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}
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extern "C" DIR *
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fdopendir (int fd)
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{
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DIR *res = NULL;
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cygheap_fdget cfd (fd);
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if (cfd >= 0)
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res = cfd->opendir (fd);
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return res;
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}
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static int
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readdir_worker (DIR *dir, dirent *de)
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{
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myfault efault;
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if (efault.faulted ())
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return EFAULT;
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if (dir->__d_cookie != __DIRENT_COOKIE)
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{
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syscall_printf ("%p = readdir (%p)", NULL, dir);
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return EBADF;
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}
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de->d_ino = 0;
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int res = ((fhandler_base *) dir->__fh)->readdir (dir, de);
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if (res == ENMFILE)
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{
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if (!(dir->__flags & dirent_saw_dot))
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{
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strcpy (de->d_name, ".");
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dir->__flags |= dirent_saw_dot;
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dir->__d_position++;
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res = 0;
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}
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else if (!(dir->__flags & dirent_saw_dot_dot))
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{
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strcpy (de->d_name, "..");
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dir->__flags |= dirent_saw_dot_dot;
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dir->__d_position++;
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res = 0;
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}
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}
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if (!res && !de->d_ino)
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{
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bool is_dot = false;
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bool is_dot_dot = false;
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if (de->d_name[0] == '.')
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{
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if (de->d_name[1] == '\0')
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is_dot = true;
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else if (de->d_name[1] == '.' && de->d_name[2] == '\0')
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is_dot_dot = true;
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}
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if (is_dot_dot && !(dir->__flags & dirent_isroot))
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de->d_ino = readdir_get_ino (((fhandler_base *) dir->__fh)->get_name (),
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true);
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else
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{
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/* Compute d_ino by combining filename hash with directory hash. */
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de->d_ino = ((fhandler_base *) dir->__fh)->get_ino ();
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if (!is_dot && !is_dot_dot)
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{
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PUNICODE_STRING w32name =
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((fhandler_base *) dir->__fh)->pc.get_nt_native_path ();
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DWORD devn = ((fhandler_base *) dir->__fh)->get_device ();
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/* Paths below /proc don't have a Win32 pendant. */
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if (isproc_dev (devn))
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de->d_ino = hash_path_name (de->d_ino, L"/");
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else if (w32name->Buffer[w32name->Length / sizeof (WCHAR) - 1]
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!= L'\\')
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de->d_ino = hash_path_name (de->d_ino, L"\\");
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de->d_ino = hash_path_name (de->d_ino, de->d_name);
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}
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}
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}
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/* This fills out the old 32 bit d_ino field for old applications,
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build under Cygwin before 1.5.x. */
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de->__d_internal1 = de->d_ino;
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return res;
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}
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/* readdir: POSIX 5.1.2.1 */
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extern "C" struct dirent *
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readdir (DIR *dir)
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{
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int res = readdir_worker (dir, dir->__d_dirent);
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if (res == 0)
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return dir->__d_dirent;
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if (res != ENMFILE)
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set_errno (res);
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return NULL;
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}
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extern "C" int
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readdir_r (DIR *dir, dirent *de, dirent **ode)
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{
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int res = readdir_worker (dir, de);
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if (!res)
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*ode = de;
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else
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{
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*ode = NULL;
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if (res == ENMFILE)
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res = 0;
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}
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return res;
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}
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extern "C" _off64_t
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telldir64 (DIR *dir)
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{
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myfault efault;
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if (efault.faulted (EFAULT))
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return -1;
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if (dir->__d_cookie != __DIRENT_COOKIE)
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return 0;
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return ((fhandler_base *) dir->__fh)->telldir (dir);
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}
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/* telldir */
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extern "C" _off_t
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telldir (DIR *dir)
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{
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return telldir64 (dir);
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}
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extern "C" void
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seekdir64 (DIR *dir, _off64_t loc)
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{
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myfault efault;
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if (efault.faulted (EFAULT))
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return;
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if (dir->__d_cookie != __DIRENT_COOKIE)
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return;
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dir->__flags &= dirent_info_mask;
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return ((fhandler_base *) dir->__fh)->seekdir (dir, loc);
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}
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/* seekdir */
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extern "C" void
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seekdir (DIR *dir, _off_t loc)
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{
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seekdir64 (dir, (_off64_t)loc);
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}
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/* rewinddir: POSIX 5.1.2.1 */
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extern "C" void
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rewinddir (DIR *dir)
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{
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myfault efault;
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if (efault.faulted (EFAULT))
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return;
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if (dir->__d_cookie != __DIRENT_COOKIE)
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return;
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dir->__flags &= dirent_info_mask;
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return ((fhandler_base *) dir->__fh)->rewinddir (dir);
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}
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/* closedir: POSIX 5.1.2.1 */
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extern "C" int
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closedir (DIR *dir)
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{
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myfault efault;
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if (efault.faulted (EFAULT))
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return -1;
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if (dir->__d_cookie != __DIRENT_COOKIE)
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{
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set_errno (EBADF);
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syscall_printf ("-1 = closedir (%p)", dir);
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return -1;
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}
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/* Reset the marker in case the caller tries to use `dir' again. */
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dir->__d_cookie = 0;
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int res = ((fhandler_base *) dir->__fh)->closedir (dir);
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cygheap->fdtab.release (dir->__d_fd);
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free (dir->__d_dirname);
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free (dir->__d_dirent);
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free (dir);
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syscall_printf ("%d = closedir (%p)", res);
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return res;
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}
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/* mkdir: POSIX 5.4.1.1 */
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extern "C" int
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mkdir (const char *dir, mode_t mode)
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{
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int res = -1;
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fhandler_base *fh = NULL;
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myfault efault;
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if (efault.faulted (EFAULT))
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return -1;
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if (!(fh = build_fh_name (dir, NULL, PC_SYM_NOFOLLOW)))
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goto done; /* errno already set */;
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if (fh->error ())
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{
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debug_printf ("got %d error from build_fh_name", fh->error ());
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set_errno (fh->error ());
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}
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else if (has_dot_last_component (dir, true))
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set_errno (fh->exists () ? EEXIST : ENOENT);
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else if (!fh->mkdir (mode))
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res = 0;
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delete fh;
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done:
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syscall_printf ("%d = mkdir (%s, %d)", res, dir, mode);
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return res;
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}
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/* rmdir: POSIX 5.5.2.1 */
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extern "C" int
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rmdir (const char *dir)
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{
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int res = -1;
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fhandler_base *fh = NULL;
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myfault efault;
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if (efault.faulted (EFAULT))
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return -1;
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if (!(fh = build_fh_name (dir, NULL, PC_SYM_NOFOLLOW)))
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goto done; /* errno already set */;
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if (fh->error ())
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{
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debug_printf ("got %d error from build_fh_name", fh->error ());
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set_errno (fh->error ());
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}
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else if (!fh->exists ())
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set_errno (ENOENT);
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else if (has_dot_last_component (dir, false))
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set_errno (EINVAL);
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else if (!fh->rmdir ())
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res = 0;
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delete fh;
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done:
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syscall_printf ("%d = rmdir (%s)", res, dir);
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return res;
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}
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