1 /* The proper definitions for Linux's sigaction. 2 Copyright (C) 1993-1999, 2000 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 * In uclibc, it is identical to "new" struct kernel_sigaction 25 * (one from the Linux 2.1.68 kernel). 26 * This minimizes amount of translation in sigaction(). 27 */ 28 struct sigaction { 29 #ifdef __USE_POSIX199309 30 union { 31 __sighandler_t sa_handler; 32 void (*sa_sigaction)(int, siginfo_t *, void *); 33 } __sigaction_handler; 34 # define sa_handler __sigaction_handler.sa_handler 35 # define sa_sigaction __sigaction_handler.sa_sigaction 36 #else 37 __sighandler_t sa_handler; 38 #endif 39 unsigned long sa_flags; 40 void (*sa_restorer)(void); 41 sigset_t sa_mask; 42 }; 43 44 /* Bits in `sa_flags'. */ 45 #define SA_NOCLDSTOP 1 /* Don't send SIGCHLD when children stop. */ 46 #define SA_NOCLDWAIT 2 /* Don't create zombie on child death. */ 47 #define SA_SIGINFO 4 /* 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_RESTART 0x10000000 /* Restart syscall on signal return. */ 52 # define SA_NODEFER 0x40000000 /* Don't automatically block the signal when 53 its handler is being executed. */ 54 # define SA_RESETHAND 0x80000000 /* Reset to SIG_DFL on entry to handler. */ 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_BLOCK 0 /* Block signals. */ 67 #define SIG_UNBLOCK 1 /* Unblock signals. */ 68 #define SIG_SETMASK 2 /* Set the set of blocked signals. */ 69