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, write to the Free 17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 18 02111-1307 USA. */ 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 * In uclibc, it is identical to "new" struct kernel_sigaction 26 * (one from the Linux 2.1.68 kernel). 27 * This minimizes amount of translation in sigaction(). 28 */ 29struct sigaction { 30#ifdef __USE_POSIX199309 31 union { 32 __sighandler_t sa_handler; 33 void (*sa_sigaction)(int, siginfo_t *, void *); 34 } __sigaction_handler; 35# define sa_handler __sigaction_handler.sa_handler 36# define sa_sigaction __sigaction_handler.sa_sigaction 37#else 38 __sighandler_t sa_handler; 39#endif 40 unsigned long sa_flags; 41 void (*sa_restorer)(void); 42 sigset_t sa_mask; 43}; 44 45/* Bits in `sa_flags'. */ 46#define SA_NOCLDSTOP 1 /* Don't send SIGCHLD when children stop. */ 47#define SA_NOCLDWAIT 2 /* Don't create zombie on child death. */ 48#define SA_SIGINFO 4 /* Invoke signal-catching function with 49 three arguments instead of one. */ 50#if defined __USE_UNIX98 || defined __USE_MISC 51# define SA_ONSTACK 0x08000000 /* Use signal stack by using `sa_restorer'. */ 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# define SA_RESETHAND 0x80000000 /* Reset to SIG_DFL on entry to handler. */ 56#endif 57#ifdef __USE_MISC 58# define SA_INTERRUPT 0x20000000 /* Historical no-op. */ 59 60/* Some aliases for the SA_ constants. */ 61# define SA_NOMASK SA_NODEFER 62# define SA_ONESHOT SA_RESETHAND 63# define SA_STACK SA_ONSTACK 64#endif 65 66/* Values for the HOW argument to `sigprocmask'. */ 67#define SIG_BLOCK 0 /* Block signals. */ 68#define SIG_UNBLOCK 1 /* Unblock signals. */ 69#define SIG_SETMASK 2 /* Set the set of blocked signals. */ 70