1 /* Definitions for Linux/HPPA sigaction. 2 Copyright (C) 1996-2022 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 <https://www.gnu.org/licenses/>. */ 18 19 #ifndef _BITS_SIGACTION_H 20 #define _BITS_SIGACTION_H 1 21 22 #ifndef _SIGNAL_H 23 # error "Never include <bits/sigaction.h> directly; use <signal.h> instead." 24 #endif 25 26 #include <bits/wordsize.h> 27 28 /* Structure describing the action to be taken when a signal arrives. */ 29 struct sigaction 30 { 31 /* Signal handler. */ 32 #if defined __USE_POSIX199309 || defined __USE_XOPEN_EXTENDED 33 union 34 { 35 /* Used if SA_SIGINFO is not set. */ 36 __sighandler_t sa_handler; 37 /* Used if SA_SIGINFO is set. */ 38 void (*sa_sigaction) (int, siginfo_t *, void *); 39 } 40 __sigaction_handler; 41 # define sa_handler __sigaction_handler.sa_handler 42 # define sa_sigaction __sigaction_handler.sa_sigaction 43 #else 44 __sighandler_t sa_handler; 45 #endif 46 47 /* Special flags. */ 48 #if __WORDSIZE == 64 49 int __glibc_reserved0; 50 #endif 51 int sa_flags; 52 53 /* Additional set of signals to be blocked. */ 54 __sigset_t sa_mask; 55 }; 56 57 /* Bits in `sa_flags'. */ 58 59 #define SA_NOCLDSTOP 0x00000008 /* Don't send SIGCHLD when children stop. */ 60 #define SA_NOCLDWAIT 0x00000080 /* Don't create zombie on child death. */ 61 #define SA_SIGINFO 0x00000010 /* Invoke signal-catching function with 62 three arguments instead of one. */ 63 #if defined __USE_XOPEN_EXTENDED || defined __USE_MISC 64 # define SA_ONSTACK 0x00000001 /* Use signal stack by using `sa_restorer'. */ 65 #endif 66 #if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8 67 # define SA_RESETHAND 0x00000004 /* Reset to SIG_DFL on entry to handler. */ 68 # define SA_NODEFER 0x00000020 /* Don't automatically block the signal 69 when its handler is being executed. */ 70 # define SA_RESTART 0x00000040 /* Restart syscall on signal return. */ 71 #endif 72 #ifdef __USE_MISC 73 # define SA_INTERRUPT 0x20000000 /* Historic no-op. */ 74 75 /* Some aliases for the SA_ constants. */ 76 # define SA_NOMASK SA_NODEFER 77 # define SA_ONESHOT SA_RESETHAND 78 # define SA_STACK SA_ONSTACK 79 #endif 80 81 /* Values for the HOW argument to `sigprocmask'. */ 82 #define SIG_BLOCK 0 /* for blocking signals */ 83 #define SIG_UNBLOCK 1 /* for unblocking signals */ 84 #define SIG_SETMASK 2 /* for setting the signal mask */ 85 86 #endif 87