io/mkfifoat.c

   1 /* Copyright (C) 1991, 1995, 1996, 1997, 2005 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, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <errno.h>
  20 #include <fcntl.h>
  21 #include <stddef.h>
  22 #include <sys/stat.h>
  23 #include <sys/types.h>
  24
  25
  26 /* Create a named pipe (FIFO) named PATH relative to FD with
  27    protections MODE.  */
  28 int
  29 mkfifoat (fd, path, mode)
  30      int fd;
  31      const char *path;
  32      mode_t mode;
  33 {
  34   if (path == NULL)
  35     {
  36       __set_errno (EINVAL);
  37       return -1;
  38     }
  39
  40   if (fd != AT_FDCWD && path[0] != '/')
  41     {
  42       /* Check FD is associated with a directory.  */
  43       struct stat64 st;
  44       if (__fxstat64 (_STAT_VER, fd, &st) != 0)
  45         return -1;
  46
  47       if (!S_ISDIR (st.st_mode))
  48         {
  49           __set_errno (ENOTDIR);
  50           return -1;
  51         }
  52     }
  53
  54   __set_errno (ENOSYS);
  55   return -1;
  56 }
  57
  58
  59 stub_warning (mkfifoat)
  60 #include <stub-tag.h>