sigaction.h 2.6 KB

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  1. /* The proper definitions for Linux/Alpha sigaction.
  2. Copyright (C) 1996, 1997, 1999, 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. #ifdef __USE_POSIX199309
  22. union {
  23. __sighandler_t sa_handler;
  24. void (*sa_sigaction)(int, siginfo_t *, void *);
  25. } __sigaction_handler;
  26. # define sa_handler __sigaction_handler.sa_handler
  27. # define sa_sigaction __sigaction_handler.sa_sigaction
  28. #else
  29. __sighandler_t sa_handler;
  30. #endif
  31. unsigned sa_flags;
  32. sigset_t sa_mask;
  33. /* Alpha has no sa_restorer field. */
  34. };
  35. /* Bits in `sa_flags'. */
  36. #define SA_NOCLDSTOP 0x00000004 /* Don't send SIGCHLD when children stop. */
  37. #define SA_NOCLDWAIT 0x00000020 /* Don't create zombie on child death. */
  38. #define SA_SIGINFO 0x00000040 /* Invoke signal-catching function with
  39. three arguments instead of one. */
  40. #if defined __USE_UNIX98 || defined __USE_MISC
  41. # define SA_ONSTACK 0x00000001 /* Use signal stack by using `sa_restorer'. */
  42. # define SA_RESTART 0x00000002 /* Restart syscall on signal return. */
  43. # define SA_NODEFER 0x00000008 /* Don't automatically block the signal
  44. when its handler is being executed. */
  45. # define SA_RESETHAND 0x00000010 /* Reset to SIG_DFL on entry to handler. */
  46. #endif
  47. #ifdef __USE_MISC
  48. # define SA_INTERRUPT 0x20000000 /* Historical no-op. */
  49. /* Some aliases for the SA_ constants. */
  50. # define SA_NOMASK SA_NODEFER
  51. # define SA_ONESHOT SA_RESETHAND
  52. # define SA_STACK SA_ONSTACK
  53. #endif
  54. /* Values for the HOW argument to `sigprocmask'. */
  55. #define SIG_BLOCK 1 /* Block signals. */
  56. #define SIG_UNBLOCK 2 /* Unblock signals. */
  57. #define SIG_SETMASK 3 /* Set the set of blocked signals. */