Imported Upstream version 1.5

[debian/gzip] / lib / chown.c

diff --git a/lib/chown.c b/lib/chown.c
deleted file mode 100644 (file)
index d8f6bfe..0000000
--- a/lib/chown.c
+++ /dev/null
@@ -1,156 +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, 2004-2007, 2009-2010 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 <errno.h>
-#include <fcntl.h>
-#include <stdbool.h>
-#include <string.h>
-#include <sys/stat.h>
-
-#if !HAVE_CHOWN
-
-/* Simple stub that always fails with ENOSYS, for mingw.  */
-int
-chown (const char *file _GL_UNUSED, uid_t uid _GL_UNUSED,
-       gid_t gid _GL_UNUSED)
-{
-  errno = ENOSYS;
-  return -1;
-}
-
-#else /* HAVE_CHOWN */
-
-/* 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)
-{
-  struct stat st;
-  bool stat_valid = false;
-  int result;
-
-# if CHOWN_CHANGE_TIME_BUG
-  if (gid != (gid_t) -1 || uid != (uid_t) -1)
-    {
-      if (stat (file, &st))
-        return -1;
-      stat_valid = true;
-    }
-# endif
-
-# if CHOWN_FAILS_TO_HONOR_ID_OF_NEGATIVE_ONE
-  if (gid == (gid_t) -1 || uid == (uid_t) -1)
-    {
-      /* Stat file to get id(s) that should remain unchanged.  */
-      if (!stat_valid && stat (file, &st))
-        return -1;
-      if (gid == (gid_t) -1)
-        gid = st.st_gid;
-      if (uid == (uid_t) -1)
-        uid = st.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 saved_errno;
-        bool fchown_socket_failure;
-
-        result = fchown (fd, uid, gid);
-        saved_errno = errno;
-
-        /* POSIX says fchown can fail with errno == EINVAL on sockets
-           and pipes, so fall back on chown in that case.  */
-        fchown_socket_failure =
-          (result != 0 && saved_errno == EINVAL
-           && fstat (fd, &st) == 0
-           && (S_ISFIFO (st.st_mode) || S_ISSOCK (st.st_mode)));
-
-        close (fd);
-
-        if (! fchown_socket_failure)
-          {
-            errno = saved_errno;
-            return result;
-          }
-      }
-    else if (errno != EACCES)
-      return -1;
-  }
-# endif
-
-# if CHOWN_TRAILING_SLASH_BUG
-  if (!stat_valid)
-    {
-      size_t len = strlen (file);
-      if (len && file[len - 1] == '/' && stat (file, &st))
-        return -1;
-    }
-# endif
-
-  result = chown (file, uid, gid);
-
-# if CHOWN_CHANGE_TIME_BUG
-  if (result == 0 && stat_valid
-      && (uid == st.st_uid || uid == (uid_t) -1)
-      && (gid == st.st_gid || gid == (gid_t) -1))
-    {
-      /* No change in ownership, but at least one argument was not -1,
-         so we are required to update ctime.  Since chown succeeded,
-         we assume that chmod will do likewise.  Fortunately, on all
-         known systems where a 'no-op' chown skips the ctime update, a
-         'no-op' chmod still does the trick.  */
-      result = chmod (file, st.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO
-                                          | S_ISUID | S_ISGID | S_ISVTX));
-    }
-# endif
-
-  return result;
-}
-
-#endif /* HAVE_CHOWN */