1 /* Definitions for 31 & 64 bit S/390 sigaction. 2 Copyright (C) 2001-2022 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 #if __WORDSIZE == 64 29 /* Structure describing the action to be taken when a signal arrives. */ 30 struct sigaction 31 { 32 /* Signal handler. */ 33 #if defined __USE_POSIX199309 || defined __USE_XOPEN_EXTENDED 34 union 35 { 36 /* Used if SA_SIGINFO is not set. */ 37 __sighandler_t sa_handler; 38 /* Used if SA_SIGINFO is set. */ 39 void (*sa_sigaction) (int, siginfo_t *, void *); 40 } 41 __sigaction_handler; 42 # define sa_handler __sigaction_handler.sa_handler 43 # define sa_sigaction __sigaction_handler.sa_sigaction 44 #else 45 __sighandler_t sa_handler; 46 #endif 47 48 /* Special flags. */ 49 int __glibc_reserved0; 50 int sa_flags; 51 52 /* Restore handler. */ 53 void (*sa_restorer) (void); 54 55 /* Additional set of signals to be blocked. */ 56 __sigset_t sa_mask; 57 }; 58 #else 59 /* Structure describing the action to be taken when a signal arrives. */ 60 struct sigaction 61 { 62 /* Signal handler. */ 63 #if defined __USE_POSIX199309 || defined __USE_XOPEN_EXTENDED 64 union 65 { 66 /* Used if SA_SIGINFO is not set. */ 67 __sighandler_t sa_handler; 68 /* Used if SA_SIGINFO is set. */ 69 void (*sa_sigaction) (int, siginfo_t *, void *); 70 } 71 __sigaction_handler; 72 # define sa_handler __sigaction_handler.sa_handler 73 # define sa_sigaction __sigaction_handler.sa_sigaction 74 #else 75 __sighandler_t sa_handler; 76 #endif 77 78 /* Additional set of signals to be blocked. */ 79 __sigset_t sa_mask; 80 81 /* Special flags. */ 82 int sa_flags; 83 84 /* Restore handler. */ 85 void (*sa_restorer) (void); 86 }; 87 #endif 88 89 /* Bits in `sa_flags'. */ 90 #define SA_NOCLDSTOP 1 /* Don't send SIGCHLD when children stop. */ 91 #define SA_NOCLDWAIT 2 /* Don't create zombie on child death. */ 92 #define SA_SIGINFO 4 /* Invoke signal-catching function with 93 three arguments instead of one. */ 94 #if defined __USE_XOPEN_EXTENDED || defined __USE_MISC 95 # define SA_ONSTACK 0x08000000 /* Use signal stack by using `sa_restorer'. */ 96 #endif 97 #if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8 98 # define SA_RESTART 0x10000000 /* Restart syscall on signal return. */ 99 # define SA_NODEFER 0x40000000 /* Don't automatically block the signal when 100 its handler is being executed. */ 101 # define SA_RESETHAND 0x80000000 /* Reset to SIG_DFL on entry to handler. */ 102 #endif 103 #ifdef __USE_MISC 104 # define SA_INTERRUPT 0x20000000 /* Historical no-op. */ 105 106 /* Some aliases for the SA_ constants. */ 107 # define SA_NOMASK SA_NODEFER 108 # define SA_ONESHOT SA_RESETHAND 109 # define SA_STACK SA_ONSTACK 110 #endif 111 112 /* Values for the HOW argument to `sigprocmask'. */ 113 #define SIG_BLOCK 0 /* Block signals. */ 114 #define SIG_UNBLOCK 1 /* Unblock signals. */ 115 #define SIG_SETMASK 2 /* Set the set of blocked signals. */ 116 117 #endif 118