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 ()