rt/tst-mqueue.h

   1 /* Common code for message queue passing tests.
   2    Copyright (C) 2004-2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <mqueue.h>
  20 #include <search.h>
  21 #include <stdlib.h>
  22 #include <stdio.h>
  23 #include <string.h>
  24 #include <sys/uio.h>
  25 #include <unistd.h>
  26
  27 static int temp_mq_fd;
  28
  29 /* Add temporary files in list.  */
  30 static void
  31 __attribute__ ((unused))
  32 add_temp_mq (const char *name)
  33 {
  34   struct iovec iov[2];
  35   iov[0].iov_base = (char *) name;
  36   iov[0].iov_len = strlen (name);
  37   iov[1].iov_base = (char *) "\n";
  38   iov[1].iov_len = 1;
  39   if (writev (temp_mq_fd, iov, 2) != iov[0].iov_len + 1)
  40     printf ("Could not record temp mq filename %s\n", name);
  41 }
  42
  43 /* Delete all temporary message queues.  */
  44 static void
  45 do_cleanup (void)
  46 {
  47   if (lseek (temp_mq_fd, 0, SEEK_SET) != 0)
  48     return;
  49
  50   FILE *f = fdopen (temp_mq_fd, "r");
  51   if (f == NULL)
  52     return;
  53
  54   char *line = NULL;
  55   size_t n = 0;
  56   ssize_t rets;
  57   while ((rets = getline (&line, &n, f)) > 0)
  58     {
  59       if (line[rets - 1] != '\n')
  60         continue;
  61
  62       line[rets - 1] = '\0';
  63       mq_unlink (line);
  64     }
  65   fclose (f);
  66 }
  67
  68 static void
  69 do_prepare (void)
  70 {
  71   char name [] = "/tmp/tst-mqueueN.XXXXXX";
  72   temp_mq_fd = mkstemp (name);
  73   if (temp_mq_fd == -1)
  74     {
  75       printf ("Could not create temporary file %s: %m\n", name);
  76       exit (1);
  77     }
  78   unlink (name);
  79 }
  80
  81 #define PREPARE(argc, argv) do_prepare ()
  82 #define CLEANUP_HANDLER do_cleanup ()