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