sysdeps/pthread/tst-sem8.c

   1 /* Copyright (C) 2003-2022 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    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <fcntl.h>
  20 #include <semaphore.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <unistd.h>
  24
  25
  26 static void
  27 remove_sem (int status, void *arg)
  28 {
  29   sem_unlink (arg);
  30 }
  31
  32
  33 static int
  34 do_test (void)
  35 {
  36   sem_t *s;
  37   int i;
  38
  39   on_exit (remove_sem, (void *) "/glibc-tst-sem8");
  40
  41   for (i = 0; i < 3; ++i)
  42     {
  43       s = sem_open ("/glibc-tst-sem8", O_CREAT, 0600, 1);
  44       if (s == SEM_FAILED)
  45         {
  46           if (errno == ENOSYS)
  47             {
  48               puts ("sem_open not supported.  Oh well.");
  49               return 0;
  50             }
  51
  52           /* Maybe the shm filesystem has strict permissions.  */
  53           if (errno == EACCES)
  54             {
  55               puts ("sem_open not allowed.  Oh well.");
  56               return 0;
  57             }
  58
  59           printf ("sem_open: %m\n");
  60           return 1;
  61         }
  62
  63       /* Now close the handle.  */
  64       if (sem_close (s) != 0)
  65         {
  66           puts ("sem_close failed");
  67           return 1;
  68         }
  69     }
  70
  71   return 0;
  72 }
  73
  74 #define TEST_FUNCTION do_test ()
  75 #include "../test-skeleton.c"