203 lines
7.2 KiB
C
203 lines
7.2 KiB
C
/* $OpenBSD: signal.h,v 1.29 2018/04/18 16:05:20 deraadt Exp $ */
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/* $NetBSD: signal.h,v 1.21 1996/02/09 18:25:32 christos Exp $ */
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/*
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* Copyright (c) 1982, 1986, 1989, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)signal.h 8.2 (Berkeley) 1/21/94
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*/
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#ifndef _SYS_SIGNAL_H_
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#define _SYS_SIGNAL_H_
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#include <machine/signal.h> /* sigcontext; codes for SIGILL, SIGFPE */
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#define _NSIG 33 /* counting 0 (mask is 1-32) */
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#if __BSD_VISIBLE
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#define NSIG _NSIG
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#endif
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#define SIGHUP 1 /* hangup */
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#define SIGINT 2 /* interrupt */
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#define SIGQUIT 3 /* quit */
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#define SIGILL 4 /* illegal instruction (not reset when caught) */
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#define SIGTRAP 5 /* trace trap (not reset when caught) */
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#define SIGABRT 6 /* abort() */
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#if __BSD_VISIBLE
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#define SIGIOT SIGABRT /* compatibility */
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#define SIGEMT 7 /* EMT instruction */
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#endif
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#define SIGFPE 8 /* floating point exception */
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#define SIGKILL 9 /* kill (cannot be caught or ignored) */
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#define SIGBUS 10 /* bus error */
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#define SIGSEGV 11 /* segmentation violation */
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#define SIGSYS 12 /* bad argument to system call */
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#define SIGPIPE 13 /* write on a pipe with no one to read it */
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#define SIGALRM 14 /* alarm clock */
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#define SIGTERM 15 /* software termination signal from kill */
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#define SIGURG 16 /* urgent condition on IO channel */
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#define SIGSTOP 17 /* sendable stop signal not from tty */
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#define SIGTSTP 18 /* stop signal from tty */
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#define SIGCONT 19 /* continue a stopped process */
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#define SIGCHLD 20 /* to parent on child stop or exit */
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#define SIGTTIN 21 /* to readers pgrp upon background tty read */
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#define SIGTTOU 22 /* like TTIN for output if (tp->t_local<OSTOP) */
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#if __BSD_VISIBLE
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#define SIGIO 23 /* input/output possible signal */
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#endif
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#define SIGXCPU 24 /* exceeded CPU time limit */
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#define SIGXFSZ 25 /* exceeded file size limit */
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#define SIGVTALRM 26 /* virtual time alarm */
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#define SIGPROF 27 /* profiling time alarm */
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#if __BSD_VISIBLE
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#define SIGWINCH 28 /* window size changes */
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#define SIGINFO 29 /* information request */
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#endif
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#define SIGUSR1 30 /* user defined signal 1 */
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#define SIGUSR2 31 /* user defined signal 2 */
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#if __BSD_VISIBLE
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#define SIGTHR 32 /* thread library AST */
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#endif
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/*
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* Language spec says we must list exactly one parameter, even though we
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* actually supply three. Ugh!
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*/
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#define SIG_DFL (void (*)(int))0
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#define SIG_IGN (void (*)(int))1
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#define SIG_ERR (void (*)(int))-1
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#if __POSIX_VISIBLE || __XPG_VISIBLE
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#ifndef _SIGSET_T_DEFINED_
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#define _SIGSET_T_DEFINED_
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typedef unsigned int sigset_t;
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#endif
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#include <sys/siginfo.h>
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/*
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* Signal vector "template" used in sigaction call.
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*/
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struct sigaction {
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union { /* signal handler */
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void (*__sa_handler)(int);
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void (*__sa_sigaction)(int, siginfo_t *, void *);
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} __sigaction_u;
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sigset_t sa_mask; /* signal mask to apply */
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int sa_flags; /* see signal options below */
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};
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/* if SA_SIGINFO is set, sa_sigaction is to be used instead of sa_handler. */
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#define sa_handler __sigaction_u.__sa_handler
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#define sa_sigaction __sigaction_u.__sa_sigaction
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#if __XPG_VISIBLE >= 500
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#define SA_ONSTACK 0x0001 /* take signal on signal stack */
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#define SA_RESTART 0x0002 /* restart system on signal return */
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#define SA_RESETHAND 0x0004 /* reset to SIG_DFL when taking signal */
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#define SA_NODEFER 0x0010 /* don't mask the signal we're delivering */
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#define SA_NOCLDWAIT 0x0020 /* don't create zombies (assign to pid 1) */
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#endif /* __XPG_VISIBLE >= 500 */
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#define SA_NOCLDSTOP 0x0008 /* do not generate SIGCHLD on child stop */
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#if __POSIX_VISIBLE >= 199309 || __XPG_VISIBLE >= 500
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#define SA_SIGINFO 0x0040 /* generate siginfo_t */
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#endif
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/*
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* Flags for sigprocmask:
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*/
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#define SIG_BLOCK 1 /* block specified signal set */
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#define SIG_UNBLOCK 2 /* unblock specified signal set */
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#define SIG_SETMASK 3 /* set specified signal set */
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#endif /* __POSIX_VISIBLE || __XPG_VISIBLE */
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#if __BSD_VISIBLE
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typedef void (*sig_t)(int); /* type of signal function */
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/*
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* 4.3 compatibility:
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* Signal vector "template" used in sigvec call.
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*/
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struct sigvec {
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void (*sv_handler)(int); /* signal handler */
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int sv_mask; /* signal mask to apply */
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int sv_flags; /* see signal options below */
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};
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#define SV_ONSTACK SA_ONSTACK
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#define SV_INTERRUPT SA_RESTART /* same bit, opposite sense */
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#define SV_RESETHAND SA_RESETHAND
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#define sv_onstack sv_flags /* isn't compatibility wonderful! */
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/*
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* Macro for converting signal number to a mask suitable for
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* sigblock().
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*/
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#define sigmask(m) (1U << ((m)-1))
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#define BADSIG SIG_ERR
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#endif /* __BSD_VISIBLE */
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#if __BSD_VISIBLE || __XPG_VISIBLE >= 420
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/*
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* Structure used in sigaltstack call.
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*/
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typedef struct sigaltstack {
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void *ss_sp; /* signal stack base */
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size_t ss_size; /* signal stack length */
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int ss_flags; /* SS_DISABLE and/or SS_ONSTACK */
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} stack_t;
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#define SS_ONSTACK 0x0001 /* take signals on alternate stack */
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#define SS_DISABLE 0x0004 /* disable taking signals on alternate stack */
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#define MINSIGSTKSZ (3U << _MAX_PAGE_SHIFT) /* minimum allowable stack */
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#if _MAX_PAGE_SHIFT < 14 /* recommended stack size */
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#define SIGSTKSZ (MINSIGSTKSZ + (1U << _MAX_PAGE_SHIFT) * 4)
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#else
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#define SIGSTKSZ (MINSIGSTKSZ + (1U << _MAX_PAGE_SHIFT) * 2)
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#endif
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typedef struct sigcontext ucontext_t;
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#endif /* __BSD_VISIBLE || __XPG_VISIBLE >= 420 */
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#ifndef _KERNEL
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/*
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* For historical reasons; programs expect signal's return value to be
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* defined by <sys/signal.h>.
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*/
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__BEGIN_DECLS
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void (*signal(int, void (*)(int)))(int);
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__END_DECLS
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#endif /* !_KERNEL */
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#endif /* !_SYS_SIGNAL_H_ */
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