1 /* Definitions for Linux/ia64 sigaction. 2 Copyright (C) 1996, 1997, 2000, 2003 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 The GNU C Library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; if not, see 17 <http://www.gnu.org/licenses/>. */ 18 19 #ifndef _SIGNAL_H 20 # error "Never include <bits/sigaction.h> directly; use <signal.h> instead." 21 #endif 22 23 /* Structure describing the action to be taken when a signal arrives. */ 24 struct sigaction { 25 #ifdef __USE_POSIX199309 26 union { 27 __sighandler_t sa_handler; 28 void (*sa_sigaction)(int, siginfo_t *, void *); 29 } __sigaction_handler; 30 # define sa_handler __sigaction_handler.sa_handler 31 # define sa_sigaction __sigaction_handler.sa_sigaction 32 #else 33 __sighandler_t sa_handler; 34 #endif 35 unsigned long sa_flags; 36 sigset_t sa_mask; 37 /* IA64 has no sa_restorer field. */ 38 }; 39 40 /* Bits in `sa_flags'. */ 41 #define SA_NOCLDSTOP 0x00000001 /* Don't send SIGCHLD when children stop. */ 42 #define SA_NOCLDWAIT 0x00000002 /* Don't create zombie on child death. */ 43 #define SA_SIGINFO 0x00000004 44 #if defined __USE_UNIX98 || defined __USE_MISC 45 # define SA_ONSTACK 0x08000000 /* Use signal stack by using `sa_restorer'. */ 46 # define SA_RESTART 0x10000000 /* Restart syscall on signal return. */ 47 # define SA_NODEFER 0x40000000 /* Don't automatically block the signal 48 when its handler is being executed. */ 49 # define SA_RESETHAND 0x80000000 /* Reset to SIG_DFL on entry to handler. */ 50 #endif 51 #ifdef __USE_MISC 52 # define SA_INTERRUPT 0x20000000 /* Historic no-op. */ 53 54 /* Some aliases for the SA_ constants. */ 55 # define SA_NOMASK SA_NODEFER 56 # define SA_ONESHOT SA_RESETHAND 57 # define SA_STACK SA_ONSTACK 58 #endif 59 60 /* Values for the HOW argument to `sigprocmask'. */ 61 #define SIG_BLOCK 0 /* for blocking signals */ 62 #define SIG_UNBLOCK 1 /* for unblocking signals */ 63 #define SIG_SETMASK 2 /* for setting the signal mask */ 64