1 /* The proper definitions for Linux/MIPS's sigaction. 2 Copyright (C) 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2003 3 Free Software Foundation, Inc. 4 This file is part of the GNU C Library. 5 6 The GNU C Library is free software; you can redistribute it and/or 7 modify it under the terms of the GNU Lesser General Public 8 License as published by the Free Software Foundation; either 9 version 2.1 of the License, or (at your option) any later version. 10 11 The GNU C Library is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 Lesser General Public License for more details. 15 16 You should have received a copy of the GNU Lesser General Public 17 License along with the GNU C Library; if not, see 18 <http://www.gnu.org/licenses/>. */ 19 20 #ifndef _SIGNAL_H 21 # error "Never include <bits/sigaction.h> directly; use <signal.h> instead." 22 #endif 23 24 /* Structure describing the action to be taken when a signal arrives. */ 25 struct sigaction { 26 unsigned sa_flags; 27 #ifdef __USE_POSIX199309 28 union { 29 __sighandler_t sa_handler; 30 void (*sa_sigaction)(int, siginfo_t *, void *); 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 sigset_t sa_mask; 38 void (*sa_restorer)(void); 39 /*int s_resv[1]; - reserved [deleted in uclibc] */ 40 }; 41 42 /* Bits in `sa_flags'. */ 43 /* Please note that some Linux kernels versions use different values for these 44 flags which is a bug in those kernel versions. */ 45 #define SA_NOCLDSTOP 0x00000001 /* Don't send SIGCHLD when children stop. */ 46 #define SA_NOCLDWAIT 0x00010000 /* Don't create zombie on child death. */ 47 #define SA_SIGINFO 0x00000008 /* Invoke signal-catching function with 48 three arguments instead of one. */ 49 #if defined __USE_UNIX98 || defined __USE_MISC 50 # define SA_ONSTACK 0x08000000 /* Use signal stack by using `sa_restorer'. */ 51 # define SA_RESETHAND 0x80000000 /* Reset to SIG_DFL on entry to handler. */ 52 # define SA_RESTART 0x10000000 /* Restart syscall on signal return. */ 53 # define SA_NODEFER 0x40000000 /* Don't automatically block the signal when 54 its handler is being executed. */ 55 #endif 56 #ifdef __USE_MISC 57 # define SA_INTERRUPT 0x20000000 /* Historical no-op. */ 58 59 /* Some aliases for the SA_ constants. */ 60 # define SA_NOMASK SA_NODEFER 61 # define SA_ONESHOT SA_RESETHAND 62 # define SA_STACK SA_ONSTACK 63 #endif 64 65 /* Values for the HOW argument to `sigprocmask'. */ 66 #define SIG_NOP 0 /* 0 is unused to catch errors */ 67 #define SIG_BLOCK 1 /* Block signals. */ 68 #define SIG_UNBLOCK 2 /* Unblock signals. */ 69 #define SIG_SETMASK 3 /* Set the set of blocked signals. */ 70 #ifdef __USE_MISC 71 # define SIG_SETMASK32 256 /* Goodie from SGI for BSD compatibility: 72 set only the low 32 bit of the sigset. */ 73 #endif 74