rt/tst-mqueue7.c

   1 /* Test all open message queues descriptors are closed during exec*.
   2    Copyright (C) 2004 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Jakub Jelinek <jakub@redhat.com>, 2004.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <errno.h>
  22 #include <fcntl.h>
  23 #include <mqueue.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <sys/wait.h>
  28 #include <time.h>
  29 #include <unistd.h>
  30
  31 #define OPT_AFTEREXEC 20000
  32
  33 static mqd_t after_exec = (mqd_t) -1;
  34
  35 #define CMDLINE_OPTIONS \
  36   { "after-exec", required_argument, NULL, OPT_AFTEREXEC },
  37
  38 #define CMDLINE_PROCESS \
  39   case OPT_AFTEREXEC:                                   \
  40     after_exec = (mqd_t) strtoul (optarg, NULL, 0);     \
  41     break;
  42
  43 static int
  44 do_after_exec (void)
  45 {
  46   int result = 0;
  47
  48   struct mq_attr attr;
  49   if (mq_getattr (after_exec, &attr) == 0)
  50     {
  51       puts ("mq_getattr after exec unexpectedly succeeded");
  52       result = 1;
  53     }
  54   else if (errno != EBADF)
  55     {
  56       printf ("mq_getattr after exec did not fail with EBADF: %m\n");
  57       result = 1;
  58     }
  59
  60   return result;
  61 }
  62
  63 static int
  64 do_test (int argc, char **argv)
  65 {
  66   if (after_exec != (mqd_t) -1)
  67     return do_after_exec ();
  68
  69   char name[sizeof "/tst-mqueue7-" + sizeof (pid_t) * 3];
  70   snprintf (name, sizeof (name), "/tst-mqueue7-%u", getpid ());
  71
  72   struct mq_attr attr = { .mq_maxmsg = 10, .mq_msgsize = 1 };
  73   mqd_t q = mq_open (name, O_CREAT | O_EXCL | O_WRONLY, 0600, &attr);
  74
  75   if (q == (mqd_t) -1)
  76     {
  77       printf ("mq_open failed with: %m\n");
  78       return 0;
  79     }
  80   else if (mq_unlink (name) != 0)
  81     {
  82       printf ("mq_unlink failed with: %m\n");
  83       return 1;
  84     }
  85
  86   if (mq_getattr (q, &attr) != 0)
  87     {
  88       printf ("mq_getattr failed: %m\n");
  89       return 1;
  90     }
  91
  92   char after_exec_arg[sizeof "--after-exec=0x" + sizeof (long) * 3];
  93   snprintf (after_exec_arg, sizeof (after_exec_arg),
  94             "--after-exec=0x%lx", (long) q);
  95
  96   const char *newargv[argc + 2];
  97   for (int i = 1; i < argc; ++i)
  98     newargv[i - 1] = argv[i];
  99   newargv[argc - 1] = "--direct";
 100   newargv[argc] = after_exec_arg;
 101   newargv[argc + 1] = NULL;
 102
 103   /* Verify that exec* has the effect of mq_close (q).  */
 104   execv (newargv[0], (char * const *) newargv);
 105   printf ("execv failed: %m\n");
 106   return 1;
 107 }
 108
 109 #include "../test-skeleton.c"