Imported Upstream version 1.23

[debian/tar] / lib / openat-proc.c

diff --git a/lib/openat-proc.c b/lib/openat-proc.c
deleted file mode 100644 (file)
index e84dc45..0000000
--- a/lib/openat-proc.c
+++ /dev/null
@@ -1,94 +0,0 @@
-/* Create /proc/self/fd-related names for subfiles of open directories.
-
-   Copyright (C) 2006 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 Paul Eggert.  */
-
-#include <config.h>
-
-#include "openat-priv.h"
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-
-#include <stdio.h>
-#include <string.h>
-
-#include "dirname.h"
-#include "intprops.h"
-#include "same-inode.h"
-#include "xalloc.h"
-
-/* The results of open() in this file are not used with fchdir,
-   therefore save some unnecessary work in fchdir.c.  */
-#undef open
-#undef close
-
-#define PROC_SELF_FD_FORMAT "/proc/self/fd/%d/%s"
-
-#define PROC_SELF_FD_NAME_SIZE_BOUND(len) \
-  (sizeof PROC_SELF_FD_FORMAT - sizeof "%d%s" \
-   + INT_STRLEN_BOUND (int) + (len) + 1)
-
-
-/* Set BUF to the expansion of PROC_SELF_FD_FORMAT, using FD and FILE
-   respectively for %d and %s.  If successful, return BUF if the
-   result fits in BUF, dynamically allocated memory otherwise.  But
-   return NULL if /proc is not reliable.  */
-char *
-openat_proc_name (char buf[OPENAT_BUFFER_SIZE], int fd, char const *file)
-{
-  static int proc_status = 0;
-
-  if (! proc_status)
-    {
-      /* Set PROC_STATUS to a positive value if /proc/self/fd is
-        reliable, and a negative value otherwise.  Solaris 10
-        /proc/self/fd mishandles "..", and any file name might expand
-        to ".." after symbolic link expansion, so avoid /proc/self/fd
-        if it mishandles "..".  Solaris 10 has openat, but this
-        problem is exhibited on code that built on Solaris 8 and
-        running on Solaris 10.  */
-
-      int proc_self_fd = open ("/proc/self/fd", O_RDONLY);
-      if (proc_self_fd < 0)
-       proc_status = -1;
-      else
-       {
-         struct stat proc_self_fd_dotdot_st;
-         struct stat proc_self_st;
-         char dotdot_buf[PROC_SELF_FD_NAME_SIZE_BOUND (sizeof ".." - 1)];
-         sprintf (dotdot_buf, PROC_SELF_FD_FORMAT, proc_self_fd, "..");
-         proc_status =
-           ((stat (dotdot_buf, &proc_self_fd_dotdot_st) == 0
-             && stat ("/proc/self", &proc_self_st) == 0
-             && SAME_INODE (proc_self_fd_dotdot_st, proc_self_st))
-            ? 1 : -1);
-         close (proc_self_fd);
-       }
-    }
-
-  if (proc_status < 0)
-    return NULL;
-  else
-    {
-      size_t bufsize = PROC_SELF_FD_NAME_SIZE_BOUND (strlen (file));
-      char *result = (bufsize < OPENAT_BUFFER_SIZE ? buf : xmalloc (bufsize));
-      sprintf (result, PROC_SELF_FD_FORMAT, fd, file);
-      return result;
-    }
-}