sigisempty.c 1.0 KB

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  1. /* Copyright (C) 1991, 1996, 1997 Free Software Foundation, Inc.
  2. This file is part of the GNU C Library.
  3. The GNU C Library is free software; you can redistribute it and/or
  4. modify it under the terms of the GNU Lesser General Public
  5. License as published by the Free Software Foundation; either
  6. version 2.1 of the License, or (at your option) any later version.
  7. The GNU C Library is distributed in the hope that it will be useful,
  8. but WITHOUT ANY WARRANTY; without even the implied warranty of
  9. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  10. Lesser General Public License for more details.
  11. You should have received a copy of the GNU Lesser General Public
  12. License along with the GNU C Library; if not, see
  13. <http://www.gnu.org/licenses/>. */
  14. #include <errno.h>
  15. #include <signal.h>
  16. #define __need_NULL
  17. #include <stddef.h>
  18. /* Test whether SET is empty. */
  19. int sigisemptyset (const sigset_t *set)
  20. {
  21. if (set == NULL)
  22. {
  23. __set_errno (EINVAL);
  24. return -1;
  25. }
  26. return __sigisemptyset (set);
  27. }