lib/symlink.c

   1 /* Stub for symlink().
   2    Copyright (C) 2009-2017 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  16
  17 #include <config.h>
  18
  19 /* Specification.  */
  20 #include <unistd.h>
  21
  22 #include <errno.h>
  23 #include <string.h>
  24 #include <sys/stat.h>
  25
  26
  27 #if HAVE_SYMLINK
  28
  29 # undef symlink
  30
  31 /* Create a symlink, but reject trailing slash.  */
  32 int
  33 rpl_symlink (char const *contents, char const *name)
  34 {
  35   size_t len = strlen (name);
  36   if (len && name[len - 1] == '/')
  37     {
  38       struct stat st;
  39       if (lstat (name, &st) == 0)
  40         errno = EEXIST;
  41       return -1;
  42     }
  43   return symlink (contents, name);
  44 }
  45
  46 #else /* !HAVE_SYMLINK */
  47
  48 /* The system does not support symlinks.  */
  49 int
  50 symlink (char const *contents _GL_UNUSED,
  51          char const *name _GL_UNUSED)
  52 {
  53   errno = ENOSYS;
  54   return -1;
  55 }
  56
  57 #endif /* !HAVE_SYMLINK */