No longer used.

1 files changed, 0 insertions, 131 deletions

diff --git a/lib/chmod-safer.c b/lib/chmod-safer.c
deleted file mode 100644
index 3d0ec64f6..000000000
--- a/lib/chmod-safer.c
+++ /dev/null
@@ -1,131 +0,0 @@
-/* like chmod(2), but safer, if possible
-   Copyright (C) 2005 Free Software Foundation, Inc.
-
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
-
-/* written by Jim Meyering */
-
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
-
-#include "chmod-safer.h"
-
-#ifdef S_IFMT
-# define defined_S_IFMT true
-#else
-# define defined_S_IFMT false
-#endif
-
-#include "stat-macros.h"
-
-#include <stdbool.h>
-#include <stdlib.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <unistd.h>
-
-#ifndef O_NOFOLLOW
-# define O_NOFOLLOW 0
-#endif
-
-#ifndef HAVE_FCHMOD
-# define HAVE_FCHMOD false
-# define fchmod(fd, mode) (-1)
-#endif
-
-/* Return true if the file corresponding to stat buffer pointer ST is of type,
-   TYPE, and if its major and minor device numbers match (if appropriate:
-   when the type is S_IFIFO or S_IFBLK).  */
-static inline bool
-same_file_type (struct stat const *st, dev_t device, mode_t type)
-{
-  /* The types must always match.  */
-  if (! (defined_S_IFMT ? (st->st_mode & S_IFMT) == type
-	 : type == S_IFDIR ? S_ISDIR (st->st_mode)
-	 : type == S_IFIFO ? S_ISFIFO (st->st_mode)
-	 : type == S_IFBLK ? S_ISBLK (st->st_mode)
-	 : type == S_IFCHR ? S_ISCHR (st->st_mode)
-	 : (abort (), false)))
-    return false;
-
-  /* For character and block devices, the major and minor device
-     numbers must match, too.  */
-  if (S_ISBLK (type) || S_ISCHR (type))
-    return st->st_rdev == device;
-
-  return true;
-}
-
-/* Assuming we can use open-with-O_NOFOLLOW and fchmod, set the permissions
-   of FILE to MODE, using fchmod -- but fail (setting errno to EACCES) if
-   anyone hard-links to FILE, replaces it with a symlink, or otherwise
-   changes its type.  Return zero upon success.  */
-static int
-fchmod_new (char const *file, mode_t mode, dev_t device, mode_t file_type)
-{
-  int result = 0;
-  struct stat sb;
-  int fd = open (file, O_RDONLY | O_NOCTTY | O_NOFOLLOW | O_NONBLOCK);
-  int saved_errno;
-
-  if (fd < 0)
-    return -1;
-
-  /* Given the entry we've just created, if its link count is
-     not 1 or its type/device has changed, then someone may be
-     trying to do something nasty.  However, the risk of such an
-     attack is so low that it isn't worth a special diagnostic.
-     Simply skip the fchmod and set errno, so that the
-     code below reports the failure to set permissions.
-     Note that we don't check the link count if the expected
-     type is `directory'.  */
-  result = fstat (fd, &sb);
-  if (result == 0)
-    {
-      if ((sb.st_nlink == 1 || S_ISDIR (file_type))
-	  && same_file_type (&sb, device, file_type))
-	result = fchmod (fd, mode);
-      else
-	{
-	  errno = EACCES;
-	  result = -1;
-	}
-    }
-
-  saved_errno = errno;
-  close (fd);
-  errno = saved_errno;
-  return result;
-}
-
-/* Use a safer variant of chmod, if the underlying system facilities permit.
-   This can avoid a minor race condition between when a file/device/directory
-   is created and when we set its permissions.  If the system provides an
-   fchmod function and if its open syscall honors the O_NOFOLLOW flag, then
-   use open,fchmod,close.  Otherwise, just call chmod.  FILE and MODE are
-   just as for chmod.  DEVICE is the combination (a la stat.st_rdev) of major
-   and minor device numbers.  FILE_TYPE is one of the S_IF* values, e.g.,
-   S_IFBLK, S_IFCHR, etc. */
-int
-chmod_safer (char const *file, mode_t mode, dev_t device, mode_t file_type)
-{
-  /* Using open and fchmod is reliable only if open honors the O_NOFOLLOW
-     flag.  Otherwise, an attacker could simply replace the just-created
-     entry with a symlink, and open would follow it blindly.  */
-  return (HAVE_FCHMOD && O_NOFOLLOW
-	  ? fchmod_new (file, mode, device, file_type)
-	  : chmod      (file, mode));
-}