signal.c 2.5 KB

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  1. /* vi: set sw=4 ts=4: */
  2. /*
  3. * signal testing function for uClibc
  4. *
  5. * Copyright (C) 2000 by Lineo, inc. and Erik Andersen
  6. * Copyright (C) 2000,2001 by Erik Andersen <andersen@uclibc.org>
  7. * Written by Erik Andersen <andersen@uclibc.org>
  8. *
  9. * This program is free software; you can redistribute it and/or modify it
  10. * under the terms of the GNU Library General Public License as published by
  11. * the Free Software Foundation; either version 2 of the License, or (at your
  12. * option) any later version.
  13. *
  14. * This program is distributed in the hope that it will be useful, but WITHOUT
  15. * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16. * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
  17. * for more details.
  18. *
  19. * You should have received a copy of the GNU Library General Public License
  20. * along with this program; if not, write to the Free Software Foundation,
  21. * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  22. *
  23. */
  24. #include <errno.h>
  25. #include <stdio.h>
  26. #include <stdlib.h>
  27. #include <string.h>
  28. #include <strings.h>
  29. #include <fcntl.h>
  30. #include <signal.h>
  31. /* -------------------------------------------------*/
  32. /* This stuff is common to all the testing routines */
  33. /* -------------------------------------------------*/
  34. const char *it = "<UNSET>"; /* Routine name for message routines. */
  35. size_t errors = 0;
  36. void check(int thing, int number)
  37. {
  38. if (!thing) {
  39. printf("%s: flunked test %d\n", it, number);
  40. ++errors;
  41. }
  42. }
  43. void equal(const char *a, const char *b, int number)
  44. {
  45. check(a != NULL && b != NULL && (strcmp(a, b) == 0), number);
  46. }
  47. /* -------------------------------------------------*/
  48. /* Let the tests begin.... */
  49. /* -------------------------------------------------*/
  50. int global_int = 0;
  51. void set_global_int_to_one(int signum)
  52. {
  53. printf ("Received signal %d (%s).\n", signum, strsignal(signum));
  54. global_int = 1;
  55. return;
  56. }
  57. void signal_test_1(void)
  58. {
  59. global_int = 0;
  60. it = "global variable set from signal handler";
  61. signal(SIGUSR1, set_global_int_to_one);
  62. raise(SIGUSR1);
  63. /* This should already have jumped to the signal handler */
  64. check((global_int == 1), 1);
  65. global_int = 0;
  66. signal(SIGUSR1, SIG_IGN);
  67. raise(SIGUSR1);
  68. /* This should not go to the signal handler this time since we */
  69. check((global_int == 0), 1);
  70. }
  71. int main(void)
  72. {
  73. int status;
  74. signal_test_1();
  75. if (errors == 0) {
  76. status = EXIT_SUCCESS;
  77. printf("No errors.\n");
  78. } else {
  79. status = EXIT_FAILURE;
  80. printf("%lu errors.\n", (unsigned long)errors);
  81. }
  82. exit(status);
  83. }