/* $OpenBSD: signal.h,v 1.30 2026/03/21 01:56:51 daniel Exp $ */ /* $NetBSD: signal.h,v 1.21 1996/02/09 18:25:32 christos Exp $ */ /* * Copyright (c) 1982, 1986, 1989, 1991, 1993 * The Regents of the University of California. All rights reserved. * (c) UNIX System Laboratories, Inc. * All or some portions of this file are derived from material licensed * to the University of California by American Telephone and Telegraph * Co. or Unix System Laboratories, Inc. and are reproduced herein with * the permission of UNIX System Laboratories, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)signal.h 8.2 (Berkeley) 1/21/94 */ #ifndef _SYS_SIGNAL_H_ #define _SYS_SIGNAL_H_ #include <machine/signal.h> /* sigcontext; codes for SIGILL, SIGFPE */ #define _NSIG 33 /* counting 0 (mask is 1-32) */ #if __BSD_VISIBLE #define NSIG _NSIG #endif #define SIGHUP 1 /* hangup */ #define SIGINT 2 /* interrupt */ #define SIGQUIT 3 /* quit */ #define SIGILL 4 /* illegal instruction (not reset when caught) */ #define SIGTRAP 5 /* trace trap (not reset when caught) */ #define SIGABRT 6 /* abort() */ #if __BSD_VISIBLE #define SIGIOT SIGABRT /* compatibility */ #define SIGEMT 7 /* EMT instruction */ #endif #define SIGFPE 8 /* floating point exception */ #define SIGKILL 9 /* kill (cannot be caught or ignored) */ #define SIGBUS 10 /* bus error */ #define SIGSEGV 11 /* segmentation violation */ #define SIGSYS 12 /* bad argument to system call */ #define SIGPIPE 13 /* write on a pipe with no one to read it */ #define SIGALRM 14 /* alarm clock */ #define SIGTERM 15 /* software termination signal from kill */ #define SIGURG 16 /* urgent condition on IO channel */ #define SIGSTOP 17 /* sendable stop signal not from tty */ #define SIGTSTP 18 /* stop signal from tty */ #define SIGCONT 19 /* continue a stopped process */ #define SIGCHLD 20 /* to parent on child stop or exit */ #define SIGTTIN 21 /* to readers pgrp upon background tty read */ #define SIGTTOU 22 /* like TTIN for output if (tp->t_local<OSTOP) */ #if __BSD_VISIBLE #define SIGIO 23 /* input/output possible signal */ #endif #define SIGXCPU 24 /* exceeded CPU time limit */ #define SIGXFSZ 25 /* exceeded file size limit */ #define SIGVTALRM 26 /* virtual time alarm */ #define SIGPROF 27 /* profiling time alarm */ #if __BSD_VISIBLE || __POSIX_VISIBLE >= 202405 #define SIGWINCH 28 /* window size changes */ #endif #if __BSD_VISIBLE #define SIGINFO 29 /* information request */ #endif #define SIGUSR1 30 /* user defined signal 1 */ #define SIGUSR2 31 /* user defined signal 2 */ #if __BSD_VISIBLE #define SIGTHR 32 /* thread library AST */ #endif /* * Language spec says we must list exactly one parameter, even though we * actually supply three. Ugh! */ #define SIG_DFL (void (*)(int))0 #define SIG_IGN (void (*)(int))1 #define SIG_ERR (void (*)(int))-1 #if __POSIX_VISIBLE || __XPG_VISIBLE #ifndef _SIGSET_T_DEFINED_ #define _SIGSET_T_DEFINED_ typedef unsigned int sigset_t; #endif #include <sys/siginfo.h> /* * Signal vector "template" used in sigaction call. */ struct sigaction { union { /* signal handler */ void (*__sa_handler)(int); void (*__sa_sigaction)(int, siginfo_t *, void *); } __sigaction_u; sigset_t sa_mask; /* signal mask to apply */ int sa_flags; /* see signal options below */ }; /* if SA_SIGINFO is set, sa_sigaction is to be used instead of sa_handler. */ #define sa_handler __sigaction_u.__sa_handler #define sa_sigaction __sigaction_u.__sa_sigaction #if __XPG_VISIBLE >= 500 #define SA_ONSTACK 0x0001 /* take signal on signal stack */ #define SA_RESTART 0x0002 /* restart system on signal return */ #define SA_RESETHAND 0x0004 /* reset to SIG_DFL when taking signal */ #define SA_NODEFER 0x0010 /* don't mask the signal we're delivering */ #define SA_NOCLDWAIT 0x0020 /* don't create zombies (assign to pid 1) */ #endif /* __XPG_VISIBLE >= 500 */ #define SA_NOCLDSTOP 0x0008 /* do not generate SIGCHLD on child stop */ #if __POSIX_VISIBLE >= 199309 || __XPG_VISIBLE >= 500 #define SA_SIGINFO 0x0040 /* generate siginfo_t */ #endif /* * Flags for sigprocmask: */ #define SIG_BLOCK 1 /* block specified signal set */ #define SIG_UNBLOCK 2 /* unblock specified signal set */ #define SIG_SETMASK 3 /* set specified signal set */ #endif /* __POSIX_VISIBLE || __XPG_VISIBLE */ #if __BSD_VISIBLE typedef void (*sig_t)(int); /* type of signal function */ /* * 4.3 compatibility: * Signal vector "template" used in sigvec call. */ struct sigvec { void (*sv_handler)(int); /* signal handler */ int sv_mask; /* signal mask to apply */ int sv_flags; /* see signal options below */ }; #define SV_ONSTACK SA_ONSTACK #define SV_INTERRUPT SA_RESTART /* same bit, opposite sense */ #define SV_RESETHAND SA_RESETHAND #define sv_onstack sv_flags /* isn't compatibility wonderful! */ /* * Macro for converting signal number to a mask suitable for * sigblock(). */ #define sigmask(m) (1U << ((m)-1)) #define BADSIG SIG_ERR #endif /* __BSD_VISIBLE */ #if __BSD_VISIBLE || __XPG_VISIBLE >= 420 /* * Structure used in sigaltstack call. */ typedef struct sigaltstack { void *ss_sp; /* signal stack base */ size_t ss_size; /* signal stack length */ int ss_flags; /* SS_DISABLE and/or SS_ONSTACK */ } stack_t; #define SS_ONSTACK 0x0001 /* take signals on alternate stack */ #define SS_DISABLE 0x0004 /* disable taking signals on alternate stack */ #define MINSIGSTKSZ (3U << _MAX_PAGE_SHIFT) /* minimum allowable stack */ #if _MAX_PAGE_SHIFT < 14 /* recommended stack size */ #define SIGSTKSZ (MINSIGSTKSZ + (1U << _MAX_PAGE_SHIFT) * 4) #else #define SIGSTKSZ (MINSIGSTKSZ + (1U << _MAX_PAGE_SHIFT) * 2) #endif typedef struct sigcontext ucontext_t; #endif /* __BSD_VISIBLE || __XPG_VISIBLE >= 420 */ #ifndef _KERNEL /* * For historical reasons; programs expect signal's return value to be * defined by <sys/signal.h>. */ __BEGIN_DECLS void (*signal(int, void (*)(int)))(int); __END_DECLS #endif /* !_KERNEL */ #endif /* !_SYS_SIGNAL_H_ */
