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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        8.4 (Berkeley) 5/4/95
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 */
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#ifndef        _SYS_SIGNAL_H_
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#define        _SYS_SIGNAL_H_
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#define NSIG        32                /* counting 0; could be 33 (mask is 1-32) */
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#include <machine/signal.h>        /* sigcontext */
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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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#define        SIGIOT        SIGABRT        /* compatibility */
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#define        SIGEMT        7        /* EMT instruction */
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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&LTOSTOP) */
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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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#define SIGPWR        SIGINFO
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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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#ifndef KERNEL
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/*
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 * Language spec sez 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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typedef unsigned int sigset_t;
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union sigval {
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        int        sival_int;
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        void        *sival_ptr;
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};
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struct siginfo {
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        int        si_signo;        /* redundant signal number */
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        int        si_code;        /* facility that raised this signal */
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        union sigval si_value;        /* value that was queued with signal */
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};
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typedef struct siginfo siginfo_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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        union {
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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;
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        int sa_flags;
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};
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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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/* sa_flags bits */
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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_DISABLE        0x0004        /* disable taking signals on alternate stack */
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#define SA_NOCLDSTOP        0x0008        /* do not generate SIGCHLD on child stop */
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#define SA_SIGINFO        0x0040        /* take sa_sigaction handler */
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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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#include <sys/cdefs.h>
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typedef        void (*sig_t)(int);        /* type of 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_base;                /* 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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        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_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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#ifdef _REENTRANT
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extern mutex_t __sig_lock;
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#define SIGNAL_LOCK()        mutex_lock(&__sig_lock)
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#define SIGNAL_UNLOCK()        mutex_unlock(&__sig_lock)
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#else
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#define SIGNAL_LOCK()
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#define SIGNAL_UNLOCK()
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#endif
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extern struct sigaction __sig_act[NSIG];
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extern sigset_t __sig_mask;
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extern sigset_t __sig_pending;
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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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int        __sig_flush(void);
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__END_DECLS
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#endif /* !KERNEL */
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#endif        /* !_SYS_SIGNAL_H_ */