Imported Upstream version 1.23

[debian/tar] / lib / chown.c

diff --git a/lib/chown.c b/lib/chown.c
deleted file mode 100644 (file)
index 3582b04..0000000
--- a/lib/chown.c
+++ /dev/null
@@ -1,103 +0,0 @@
-/* provide consistent interface to chown for systems that don't interpret
-   an ID of -1 as meaning `don't change the corresponding ID'.
-
-   Copyright (C) 1997, 2004, 2005, 2006, 2007 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 3 of the License, 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, see <http://www.gnu.org/licenses/>.  */
-
-/* written by Jim Meyering */
-
-#include <config.h>
-
-/* Specification.  */
-#include <unistd.h>
-
-#include <stdbool.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <errno.h>
-
-/* Below we refer to the system's chown().  */
-#undef chown
-
-/* The results of open() in this file are not used with fchdir,
-   therefore save some unnecessary work in fchdir.c.  */
-#undef open
-#undef close
-
-/* Provide a more-closely POSIX-conforming version of chown on
-   systems with one or both of the following problems:
-   - chown doesn't treat an ID of -1 as meaning
-   `don't change the corresponding ID'.
-   - chown doesn't dereference symlinks.  */
-
-int
-rpl_chown (const char *file, uid_t uid, gid_t gid)
-{
-#if CHOWN_FAILS_TO_HONOR_ID_OF_NEGATIVE_ONE
-  if (gid == (gid_t) -1 || uid == (uid_t) -1)
-    {
-      struct stat file_stats;
-
-      /* Stat file to get id(s) that should remain unchanged.  */
-      if (stat (file, &file_stats))
-       return -1;
-
-      if (gid == (gid_t) -1)
-       gid = file_stats.st_gid;
-
-      if (uid == (uid_t) -1)
-       uid = file_stats.st_uid;
-    }
-#endif
-
-#if CHOWN_MODIFIES_SYMLINK
-  {
-    /* Handle the case in which the system-supplied chown function
-       does *not* follow symlinks.  Instead, it changes permissions
-       on the symlink itself.  To work around that, we open the
-       file (but this can fail due to lack of read or write permission) and
-       use fchown on the resulting descriptor.  */
-    int open_flags = O_NONBLOCK | O_NOCTTY;
-    int fd = open (file, O_RDONLY | open_flags);
-    if (0 <= fd
-       || (errno == EACCES
-           && 0 <= (fd = open (file, O_WRONLY | open_flags))))
-      {
-       int result = fchown (fd, uid, gid);
-       int saved_errno = errno;
-
-       /* POSIX says fchown can fail with errno == EINVAL on sockets,
-          so fall back on chown in that case.  */
-       struct stat sb;
-       bool fchown_socket_failure =
-         (result != 0 && saved_errno == EINVAL
-          && fstat (fd, &sb) == 0 && S_ISFIFO (sb.st_mode));
-
-       close (fd);
-
-       if (! fchown_socket_failure)
-         {
-           errno = saved_errno;
-           return result;
-         }
-      }
-    else if (errno != EACCES)
-      return -1;
-  }
-#endif
-
-  return chown (file, uid, gid);
-}