sigaction.h 2.8 KB

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  1. /* Definitions for Linux/HPPA sigaction.
  2. Copyright (C) 1996, 1997, 2000 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. #ifndef _SIGNAL_H
  17. # error "Never include <bits/sigaction.h> directly; use <signal.h> instead."
  18. #endif
  19. /* Structure describing the action to be taken when a signal arrives. */
  20. struct sigaction
  21. {
  22. /* Signal handler. */
  23. #ifdef __USE_POSIX199309
  24. union
  25. {
  26. /* Used if SA_SIGINFO is not set. */
  27. __sighandler_t sa_handler;
  28. /* Used if SA_SIGINFO is set. */
  29. void (*sa_sigaction) (int, siginfo_t *, void *);
  30. }
  31. __sigaction_handler;
  32. # define sa_handler __sigaction_handler.sa_handler
  33. # define sa_sigaction __sigaction_handler.sa_sigaction
  34. #else
  35. __sighandler_t sa_handler;
  36. #endif
  37. /* Special flags. */
  38. unsigned long int sa_flags;
  39. /* Additional set of signals to be blocked. */
  40. __sigset_t sa_mask;
  41. };
  42. /* Bits in `sa_flags'. */
  43. #define SA_NOCLDSTOP 0x00000008 /* Don't send SIGCHLD when children stop. */
  44. #define SA_NOCLDWAIT 0x00000080 /* Don't create zombie on child death. */
  45. #define SA_SIGINFO 0x00000010 /* Invoke signal-catching function with
  46. three arguments instead of one. */
  47. #if defined __USE_UNIX98 || defined __USE_MISC
  48. # define SA_ONSTACK 0x00000001 /* Use signal stack by using `sa_restorer'. */
  49. # define SA_RESETHAND 0x00000004 /* Reset to SIG_DFL on entry to handler. */
  50. # define SA_NODEFER 0x00000020 /* Don't automatically block the signal
  51. when its handler is being executed. */
  52. # define SA_RESTART 0x00000040 /* Restart syscall on signal return. */
  53. #endif
  54. #ifdef __USE_MISC
  55. # define SA_INTERRUPT 0x20000000 /* Historic no-op. */
  56. /* Some aliases for the SA_ constants. */
  57. # define SA_NOMASK SA_NODEFER
  58. # define SA_ONESHOT SA_RESETHAND
  59. # define SA_STACK SA_ONSTACK
  60. #endif
  61. /* Values for the HOW argument to `sigprocmask'. */
  62. #define SIG_BLOCK 0 /* for blocking signals */
  63. #define SIG_UNBLOCK 1 /* for unblocking signals */
  64. #define SIG_SETMASK 2 /* for setting the signal mask */