sysdeps/unix/sysv/linux/mq_unlink.c

   1 /* Copyright (C) 2004, 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, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <mqueue.h>
  20 #include <sysdep.h>
  21
  22 #ifdef __NR_mq_unlink
  23
  24 /* Remove message queue named NAME.  */
  25 int
  26 mq_unlink (const char *name)
  27 {
  28   if (name[0] != '/')
  29     {
  30       __set_errno (EINVAL);
  31       return -1;
  32     }
  33
  34   INTERNAL_SYSCALL_DECL (err);
  35   int ret = INTERNAL_SYSCALL (mq_unlink, err, 1, name + 1);
  36
  37   /* While unlink can return either EPERM or EACCES, mq_unlink should
  38      return just EACCES.  */
  39   if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (ret, err), 0))
  40     {
  41       ret = INTERNAL_SYSCALL_ERRNO (ret, err);
  42       if (ret == EPERM)
  43         ret = EACCES;
  44       __set_errno (ret);
  45       ret = -1;
  46     }
  47
  48   return ret;
  49 }
  50
  51 #else
  52 # include <rt/mq_unlink.c>
  53 #endif