1 /* 2 * Copyright (c) 1982, 1986, 1989, 1991 Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)signal.h 7.16 (Berkeley) 03/17/91 8 */ 9 10 #ifndef _SIGNAL_H_ 11 #define _SIGNAL_H_ 12 13 #define NSIG 32 /* counting 0; could be 33 (mask is 1-32) */ 14 15 #ifndef _POSIX_SOURCE 16 #include <machine/trap.h> /* codes for SIGILL, SIGFPE */ 17 #endif /* _POSIX_SOURCE */ 18 19 #define SIGHUP 1 /* hangup */ 20 #define SIGINT 2 /* interrupt */ 21 #define SIGQUIT 3 /* quit */ 22 #define SIGILL 4 /* illegal instruction (not reset when caught) */ 23 #ifndef _POSIX_SOURCE 24 #define SIGTRAP 5 /* trace trap (not reset when caught) */ 25 #endif 26 #define SIGABRT 6 /* abort() */ 27 #ifndef _POSIX_SOURCE 28 #define SIGIOT SIGABRT /* compatibility */ 29 #define SIGEMT 7 /* EMT instruction */ 30 #endif 31 #define SIGFPE 8 /* floating point exception */ 32 #define SIGKILL 9 /* kill (cannot be caught or ignored) */ 33 #ifndef _POSIX_SOURCE 34 #define SIGBUS 10 /* bus error */ 35 #endif 36 #define SIGSEGV 11 /* segmentation violation */ 37 #ifndef _POSIX_SOURCE 38 #define SIGSYS 12 /* bad argument to system call */ 39 #endif 40 #define SIGPIPE 13 /* write on a pipe with no one to read it */ 41 #define SIGALRM 14 /* alarm clock */ 42 #define SIGTERM 15 /* software termination signal from kill */ 43 #ifndef _POSIX_SOURCE 44 #define SIGURG 16 /* urgent condition on IO channel */ 45 #endif 46 #define SIGSTOP 17 /* sendable stop signal not from tty */ 47 #define SIGTSTP 18 /* stop signal from tty */ 48 #define SIGCONT 19 /* continue a stopped process */ 49 #define SIGCHLD 20 /* to parent on child stop or exit */ 50 #define SIGTTIN 21 /* to readers pgrp upon background tty read */ 51 #define SIGTTOU 22 /* like TTIN for output if (tp->t_local<OSTOP) */ 52 #ifndef _POSIX_SOURCE 53 #define SIGIO 23 /* input/output possible signal */ 54 #define SIGXCPU 24 /* exceeded CPU time limit */ 55 #define SIGXFSZ 25 /* exceeded file size limit */ 56 #define SIGVTALRM 26 /* virtual time alarm */ 57 #define SIGPROF 27 /* profiling time alarm */ 58 #define SIGWINCH 28 /* window size changes */ 59 #define SIGINFO 29 /* information request */ 60 #endif 61 #define SIGUSR1 30 /* user defined signal 1 */ 62 #define SIGUSR2 31 /* user defined signal 2 */ 63 64 #include <sys/cdefs.h> 65 66 #ifndef _POSIX_SOURCE 67 typedef void (*sig_t) __P((int)); 68 #endif 69 70 typedef unsigned int sigset_t; 71 72 __BEGIN_DECLS 73 int sigaddset __P((sigset_t *, int)); 74 int sigdelset __P((sigset_t *, int)); 75 int sigemptyset __P((sigset_t *)); 76 int sigfillset __P((sigset_t *)); 77 int sigismember __P((const sigset_t *, int)); 78 __END_DECLS 79 80 #define sigemptyset(set) ( *(set) = 0 ) 81 #define sigfillset(set) ( *(set) = ~(sigset_t)0, 0 ) 82 #define sigaddset(set, signo) ( *(set) |= 1 << ((signo) - 1), 0) 83 #define sigdelset(set, signo) ( *(set) &= ~(1 << ((signo) - 1)), 0) 84 #define sigismember(set, signo) ( (*(set) & (1 << ((signo) - 1))) != 0) 85 86 /* 87 * Signal vector "template" used in sigaction call. 88 */ 89 struct sigaction { 90 void (*sa_handler)(); /* 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 /* do not restart system on signal return */ 97 #endif 98 #define SA_NOCLDSTOP 0x0004 /* do not generate SIGCHLD on child stop */ 99 100 /* 101 * Flags for sigprocmask: 102 */ 103 #define SIG_BLOCK 1 /* block specified signal set */ 104 #define SIG_UNBLOCK 2 /* unblock specified signal set */ 105 #define SIG_SETMASK 3 /* set specified signal set */ 106 107 #ifndef _POSIX_SOURCE 108 /* 109 * 4.3 compatibility: 110 * Signal vector "template" used in sigvec call. 111 */ 112 struct sigvec { 113 void (*sv_handler)(); /* signal handler */ 114 int sv_mask; /* signal mask to apply */ 115 int sv_flags; /* see signal options below */ 116 }; 117 #define SV_ONSTACK SA_ONSTACK 118 #define SV_INTERRUPT SA_RESTART /* same bit, opposite sense */ 119 #define sv_onstack sv_flags /* isn't compatibility wonderful! */ 120 121 /* 122 * Structure used in sigaltstack call. 123 */ 124 struct sigaltstack { 125 char *ss_base; /* signal stack base */ 126 int ss_len; /* signal stack length */ 127 int ss_onstack; /* current status */ 128 }; 129 130 /* 131 * Structure used in sigstack call. 132 */ 133 struct sigstack { 134 char *ss_sp; /* signal stack pointer */ 135 int ss_onstack; /* current status */ 136 }; 137 138 /* 139 * Information pushed on stack when a signal is delivered. 140 * This is used by the kernel to restore state following 141 * execution of the signal handler. It is also made available 142 * to the handler to allow it to restore state properly if 143 * a non-standard exit is performed. 144 */ 145 struct sigcontext { 146 int sc_onstack; /* sigstack state to restore */ 147 int sc_mask; /* signal mask to restore */ 148 int sc_sp; /* sp to restore */ 149 int sc_fp; /* fp to restore */ 150 int sc_ap; /* ap to restore */ 151 int sc_pc; /* pc to restore */ 152 int sc_ps; /* psl to restore */ 153 }; 154 155 /* 156 * Macro for converting signal number to a mask suitable for 157 * sigblock(). 158 */ 159 #define sigmask(m) (1 << ((m)-1)) 160 161 #define BADSIG (void (*)())-1 162 #endif /* _POSIX_SOURCE */ 163 164 #define SIG_DFL (void (*)())0 165 #define SIG_IGN (void (*)())1 166 167 #ifndef KERNEL 168 #include <sys/types.h> 169 170 __BEGIN_DECLS 171 void (*signal __P((int, void (*) __P((int))))) __P((int)); 172 int raise __P((int)); 173 #ifndef _ANSI_SOURCE 174 int kill __P((pid_t, int)); 175 int sigaction __P((int, const struct sigaction *, struct sigaction *)); 176 int sigpending __P((sigset_t *)); 177 int sigprocmask __P((int, const sigset_t *, sigset_t *)); 178 int sigsuspend __P((const sigset_t *)); 179 #endif /* !_ANSI_SOURCE */ 180 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE) 181 int killpg __P((pid_t, int)); 182 void psignal __P((unsigned, const char *)); 183 int sigblock __P((int)); 184 int siginterrupt __P((int, int)); 185 int sigpause __P((int)); 186 int sigreturn __P((struct sigcontext *)); 187 int sigsetmask __P((int)); 188 int sigstack __P((const struct sigstack *, struct sigstack *)); 189 int sigvec __P((int, struct sigvec *, struct sigvec *)); 190 #endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */ 191 __END_DECLS 192 193 #endif /* !KERNEL */ 194 #endif /* !_SIGNAL_H_ */ 195