tst-mqueue7.c 2.9 KB

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  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. 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. 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. You should have received a copy of the GNU Lesser General Public
  14. License along with the GNU C Library; if not, see
  15. <http://www.gnu.org/licenses/>. */
  16. #include <errno.h>
  17. #include <fcntl.h>
  18. #include <mqueue.h>
  19. #include <stdio.h>
  20. #include <stdlib.h>
  21. #include <string.h>
  22. #include <sys/wait.h>
  23. #include <time.h>
  24. #include <unistd.h>
  25. #define OPT_AFTEREXEC 20000
  26. static mqd_t after_exec = (mqd_t) -1;
  27. #define CMDLINE_OPTIONS \
  28. { "after-exec", required_argument, NULL, OPT_AFTEREXEC },
  29. #define CMDLINE_PROCESS \
  30. case OPT_AFTEREXEC: \
  31. after_exec = (mqd_t) strtoul (optarg, NULL, 0); \
  32. break;
  33. static int
  34. do_after_exec (void)
  35. {
  36. int result = 0;
  37. struct mq_attr attr;
  38. if (mq_getattr (after_exec, &attr) == 0)
  39. {
  40. puts ("mq_getattr after exec unexpectedly succeeded");
  41. result = 1;
  42. }
  43. else if (errno != EBADF)
  44. {
  45. printf ("mq_getattr after exec did not fail with EBADF: %m\n");
  46. result = 1;
  47. }
  48. return result;
  49. }
  50. static int
  51. do_test (int argc, char **argv)
  52. {
  53. if (after_exec != (mqd_t) -1)
  54. return do_after_exec ();
  55. char name[sizeof "/tst-mqueue7-" + sizeof (pid_t) * 3];
  56. snprintf (name, sizeof (name), "/tst-mqueue7-%u", getpid ());
  57. struct mq_attr attr = { .mq_maxmsg = 10, .mq_msgsize = 1 };
  58. mqd_t q = mq_open (name, O_CREAT | O_EXCL | O_WRONLY, 0600, &attr);
  59. if (q == (mqd_t) -1)
  60. {
  61. printf ("mq_open failed with: %m\n");
  62. return 0;
  63. }
  64. else if (mq_unlink (name) != 0)
  65. {
  66. printf ("mq_unlink failed with: %m\n");
  67. return 1;
  68. }
  69. if (mq_getattr (q, &attr) != 0)
  70. {
  71. printf ("mq_getattr failed: %m\n");
  72. return 1;
  73. }
  74. char after_exec_arg[sizeof "--after-exec=0x" + sizeof (long) * 3];
  75. snprintf (after_exec_arg, sizeof (after_exec_arg),
  76. "--after-exec=0x%lx", (long) q);
  77. const char *newargv[argc + 2];
  78. for (int i = 1; i < argc; ++i)
  79. newargv[i - 1] = argv[i];
  80. newargv[argc - 1] = "--direct";
  81. newargv[argc] = after_exec_arg;
  82. newargv[argc + 1] = NULL;
  83. /* Verify that exec* has the effect of mq_close (q). */
  84. execv (newargv[0], (char * const *) newargv);
  85. printf ("execv failed: %m\n");
  86. return 1;
  87. }
  88. #include "../test-skeleton.c"