204 lines
7.3 KiB
C
204 lines
7.3 KiB
C
/*
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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* $Id: signal.h,v 1.5 1995/10/19 19:16:00 swallace Exp $
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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 <sys/cdefs.h>
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#include <machine/signal.h> /* sig_atomic_t; trap codes; sigcontext */
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#if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE)
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#define NSIG 32 /* counting 0; could be 33 (mask is 1-32) */
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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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#ifndef _POSIX_SOURCE
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#define SIGTRAP 5 /* trace trap (not reset when caught) */
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#endif
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#define SIGABRT 6 /* abort() */
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#ifndef _POSIX_SOURCE
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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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#ifndef _POSIX_SOURCE
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#define SIGBUS 10 /* bus error */
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#endif
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#define SIGSEGV 11 /* segmentation violation */
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#ifndef _POSIX_SOURCE
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#define SIGSYS 12 /* non-existent system call invoked */
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#endif
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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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#ifndef _POSIX_SOURCE
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#define SIGURG 16 /* urgent condition on IO channel */
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#endif
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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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#ifndef _POSIX_SOURCE
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#define SIGIO 23 /* input/output possible signal */
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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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#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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/*-
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* Type of a signal handling function.
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*
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* Language spec sez signal handlers take exactly one arg, even though we
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* actually supply three. Ugh!
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*
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* We don't try to hide the difference by leaving out the args because
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* that would cause warnings about conformant programs. Nonconformant
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* programs can avoid the warnings by casting to (__sighandler_t *) or
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* sig_t before calling signal() or assigning to sa_handler or sv_handler.
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*
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* The kernel should reverse the cast before calling the function. It
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* has no way to do this, but on most machines 1-arg and 3-arg functions
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* have the same calling protocol so there is no problem in practice.
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* A bit in sa_flags could be used to specify the number of args.
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*/
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typedef void __sighandler_t __P((int));
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#define SIG_DFL ((__sighandler_t *)0)
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#define SIG_IGN ((__sighandler_t *)1)
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#define SIG_ERR ((__sighandler_t *)-1)
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#ifndef _ANSI_SOURCE
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typedef unsigned int sigset_t;
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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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__sighandler_t *sa_handler; /* signal handler */
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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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#ifndef _POSIX_SOURCE
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#define SA_ONSTACK 0x0001 /* take signal on signal stack */
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#define SA_RESTART 0x0002 /* restart system call on signal return */
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#define SA_DISABLE 0x0004 /* disable taking signals on alternate stack */
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#ifdef COMPAT_SUNOS
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#define SA_USERTRAMP 0x0100 /* do not bounce off kernel's sigtramp */
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#endif
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#endif
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#define SA_NOCLDSTOP 0x0008 /* do not generate SIGCHLD on child stop */
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#define SA_NODEFER 0x0010 /* don't mask the signal we're delivering */
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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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#ifndef _POSIX_SOURCE
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typedef __sighandler_t *sig_t; /* type of pointer to a signal function */
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/*
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* Structure used in sigaltstack call.
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*/
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struct sigaltstack {
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char *ss_sp; /* signal stack base */
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int ss_size; /* signal stack length */
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int ss_flags; /* SA_DISABLE and/or SA_ONSTACK */
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};
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#define MINSIGSTKSZ 8192 /* minimum allowable stack */
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#define SIGSTKSZ (MINSIGSTKSZ + 32768) /* recommended stack size */
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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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__sighandler_t *sv_handler; /* 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_onstack sv_flags /* isn't compatibility wonderful! */
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/*
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* Structure used in sigstack call.
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*/
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struct sigstack {
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char *ss_sp; /* signal stack pointer */
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int ss_onstack; /* current status */
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};
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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) (1 << ((m)-1))
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#define BADSIG SIG_ERR
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#endif /* !_POSIX_SOURCE */
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#endif /* !_ANSI_SOURCE */
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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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__sighandler_t *signal __P((int, __sighandler_t *));
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__END_DECLS
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#endif /* !_SYS_SIGNAL_H_ */
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