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/* $OpenBSD: signal.h,v 1.29 2018/04/18 16:05:20 deraadt 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
#define SIGWINCH 28 /* window size changes */
#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_ */
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