io/symlinkat.c

   1 /* Copyright (C) 2005-2014 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library 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 GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <fcntl.h>
  20 #include <stddef.h>
  21 #include <unistd.h>
  22
  23
  24 /* Make a link to FROM called TO relative to FD.  */
  25 int
  26 symlinkat (from, fd, to)
  27      const char *from;
  28      int fd;
  29      const char *to;
  30 {
  31   if (from == NULL || to == NULL)
  32     {
  33       __set_errno (EINVAL);
  34       return -1;
  35     }
  36
  37   if (fd != AT_FDCWD && fd < 0 && *to != '/')
  38     {
  39       __set_errno (EBADF);
  40       return -1;
  41     }
  42
  43   __set_errno (ENOSYS);
  44   return -1;
  45 }
  46 stub_warning (symlinkat)