sigpause.c 2.1 KB

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  1. /* Copyright (C) 1991,92,94-98,2000,2002,2003,2004
  2. Free Software Foundation, Inc.
  3. This file is part of the GNU C Library.
  4. The GNU C Library is free software; you can redistribute it and/or
  5. modify it under the terms of the GNU Lesser General Public
  6. License as published by the Free Software Foundation; either
  7. version 2.1 of the License, or (at your option) any later version.
  8. The GNU C Library is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. Lesser General Public License for more details.
  12. You should have received a copy of the GNU Lesser General Public
  13. License along with the GNU C Library; if not, write to the Free
  14. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  15. 02111-1307 USA. */
  16. #define __UCLIBC_HIDE_DEPRECATED__
  17. /* psm: need the BSD version of sigpause here */
  18. #include <errno.h>
  19. #define __FAVOR_BSD
  20. #include <signal.h>
  21. #include <stddef.h> /* For NULL. */
  22. /* libc_hidden_proto(sigprocmask) */
  23. /* libc_hidden_proto(sigdelset) */
  24. /* libc_hidden_proto(sigsuspend) */
  25. #include "sigset-cvt-mask.h"
  26. /* Set the mask of blocked signals to MASK,
  27. wait for a signal to arrive, and then restore the mask. */
  28. /* libc_hidden_proto(__sigpause) */
  29. int __sigpause (int sig_or_mask, int is_sig)
  30. {
  31. sigset_t set;
  32. if (is_sig != 0)
  33. {
  34. /* The modern X/Open implementation is requested. */
  35. if (sigprocmask (0, NULL, &set) < 0
  36. /* Yes, we call `sigdelset' and not `__sigdelset'. */
  37. || sigdelset (&set, sig_or_mask) < 0)
  38. return -1;
  39. }
  40. else if (sigset_set_old_mask (&set, sig_or_mask) < 0)
  41. return -1;
  42. return sigsuspend (&set);
  43. }
  44. libc_hidden_def(__sigpause)
  45. #undef sigpause
  46. /* We have to provide a default version of this function since the
  47. standards demand it. The version which is a bit more reasonable is
  48. the BSD version. So make this the default. */
  49. /* libc_hidden_proto(sigpause) */
  50. int sigpause (int mask)
  51. {
  52. return __sigpause (mask, 0);
  53. }
  54. libc_hidden_def(sigpause)