1 /* 2 * Copyright (c) 1982, 1986, 1989, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * (c) UNIX System Laboratories, Inc. 5 * All or some portions of this file are derived from material licensed 6 * to the University of California by American Telephone and Telegraph 7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 * the permission of UNIX System Laboratories, Inc. 9 * 10 * %sccs.include.redist.c% 11 * 12 * @(#)signal.h 8.4 (Berkeley) 05/04/95 13 */ 14 15 #ifndef _SYS_SIGNAL_H_ 16 #define _SYS_SIGNAL_H_ 17 18 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE) 19 #define NSIG 32 /* counting 0; could be 33 (mask is 1-32) */ 20 #endif 21 22 #include <machine/signal.h> /* sigcontext; codes for SIGILL, SIGFPE */ 23 24 #define SIGHUP 1 /* hangup */ 25 #define SIGINT 2 /* interrupt */ 26 #define SIGQUIT 3 /* quit */ 27 #define SIGILL 4 /* illegal instruction (not reset when caught) */ 28 #ifndef _POSIX_SOURCE 29 #define SIGTRAP 5 /* trace trap (not reset when caught) */ 30 #endif 31 #define SIGABRT 6 /* abort() */ 32 #ifndef _POSIX_SOURCE 33 #define SIGIOT SIGABRT /* compatibility */ 34 #define SIGEMT 7 /* EMT instruction */ 35 #endif 36 #define SIGFPE 8 /* floating point exception */ 37 #define SIGKILL 9 /* kill (cannot be caught or ignored) */ 38 #ifndef _POSIX_SOURCE 39 #define SIGBUS 10 /* bus error */ 40 #endif 41 #define SIGSEGV 11 /* segmentation violation */ 42 #ifndef _POSIX_SOURCE 43 #define SIGSYS 12 /* bad argument to system call */ 44 #endif 45 #define SIGPIPE 13 /* write on a pipe with no one to read it */ 46 #define SIGALRM 14 /* alarm clock */ 47 #define SIGTERM 15 /* software termination signal from kill */ 48 #ifndef _POSIX_SOURCE 49 #define SIGURG 16 /* urgent condition on IO channel */ 50 #endif 51 #define SIGSTOP 17 /* sendable stop signal not from tty */ 52 #define SIGTSTP 18 /* stop signal from tty */ 53 #define SIGCONT 19 /* continue a stopped process */ 54 #define SIGCHLD 20 /* to parent on child stop or exit */ 55 #define SIGTTIN 21 /* to readers pgrp upon background tty read */ 56 #define SIGTTOU 22 /* like TTIN for output if (tp->t_local<OSTOP) */ 57 #ifndef _POSIX_SOURCE 58 #define SIGIO 23 /* input/output possible signal */ 59 #define SIGXCPU 24 /* exceeded CPU time limit */ 60 #define SIGXFSZ 25 /* exceeded file size limit */ 61 #define SIGVTALRM 26 /* virtual time alarm */ 62 #define SIGPROF 27 /* profiling time alarm */ 63 #define SIGWINCH 28 /* window size changes */ 64 #define SIGINFO 29 /* information request */ 65 #endif 66 #define SIGUSR1 30 /* user defined signal 1 */ 67 #define SIGUSR2 31 /* user defined signal 2 */ 68 69 #if defined(_ANSI_SOURCE) || defined(__cplusplus) 70 /* 71 * Language spec sez we must list exactly one parameter, even though we 72 * actually supply three. Ugh! 73 */ 74 #define SIG_DFL (void (*)(int))0 75 #define SIG_IGN (void (*)(int))1 76 #define SIG_ERR (void (*)(int))-1 77 #else 78 #define SIG_DFL (void (*)())0 79 #define SIG_IGN (void (*)())1 80 #define SIG_ERR (void (*)())-1 81 #endif 82 83 #ifndef _ANSI_SOURCE 84 typedef unsigned int sigset_t; 85 86 /* 87 * Signal vector "template" used in sigaction call. 88 */ 89 struct sigaction { 90 void (*sa_handler)(int); /* signal handler */ 91 sigset_t sa_mask; /* signal mask to apply */ 92 int sa_flags; /* see signal options below */ 93 }; 94 #ifndef _POSIX_SOURCE 95 #define SA_ONSTACK 0x0001 /* take signal on signal stack */ 96 #define SA_RESTART 0x0002 /* restart system on signal return */ 97 #define SA_DISABLE 0x0004 /* disable taking signals on alternate stack */ 98 #ifdef COMPAT_SUNOS 99 #define SA_USERTRAMP 0x0100 /* do not bounce off kernel's sigtramp */ 100 #endif 101 #endif 102 #define SA_NOCLDSTOP 0x0008 /* do not generate SIGCHLD on child stop */ 103 104 /* 105 * Flags for sigprocmask: 106 */ 107 #define SIG_BLOCK 1 /* block specified signal set */ 108 #define SIG_UNBLOCK 2 /* unblock specified signal set */ 109 #define SIG_SETMASK 3 /* set specified signal set */ 110 111 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE) 112 #ifndef KERNEL 113 #include <sys/cdefs.h> 114 #endif 115 typedef void (*sig_t) __P((int)); /* type of signal function */ 116 117 /* 118 * Structure used in sigaltstack call. 119 */ 120 struct sigaltstack { 121 char *ss_base; /* signal stack base */ 122 int ss_size; /* signal stack length */ 123 int ss_flags; /* SA_DISABLE and/or SA_ONSTACK */ 124 }; 125 #define MINSIGSTKSZ 8192 /* minimum allowable stack */ 126 #define SIGSTKSZ (MINSIGSTKSZ + 32768) /* recommended stack size */ 127 128 /* 129 * 4.3 compatibility: 130 * Signal vector "template" used in sigvec call. 131 */ 132 struct sigvec { 133 void (*sv_handler)(int); /* signal handler */ 134 int sv_mask; /* signal mask to apply */ 135 int sv_flags; /* see signal options below */ 136 }; 137 138 #define SV_ONSTACK SA_ONSTACK 139 #define SV_INTERRUPT SA_RESTART /* same bit, opposite sense */ 140 #define sv_onstack sv_flags /* isn't compatibility wonderful! */ 141 142 /* 143 * Structure used in sigstack call. 144 */ 145 struct sigstack { 146 char *ss_sp; /* signal stack pointer */ 147 int ss_onstack; /* current status */ 148 }; 149 150 /* 151 * Macro for converting signal number to a mask suitable for 152 * sigblock(). 153 */ 154 #define sigmask(m) (1 << ((m)-1)) 155 156 #define BADSIG SIG_ERR 157 158 #endif /* !_POSIX_SOURCE */ 159 #endif /* !_ANSI_SOURCE */ 160 161 /* 162 * For historical reasons; programs expect signal's return value to be 163 * defined by <sys/signal.h>. 164 */ 165 __BEGIN_DECLS 166 void (*signal __P((int, void (*) __P((int))))) __P((int)); 167 __END_DECLS 168 #endif /* !_SYS_SIGNAL_H_ */ 169