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/*

 * Copyright (c) 1982, 1986, 1989, 1993, 1994

 *        The Regents of the University of California.  All rights reserved.

 *

 * 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.

 *

 *        @(#)wait.h        8.2 (Berkeley) 7/10/94

 */

#ifndef _SYS_WAIT_H_

#define _SYS_WAIT_H_

/*

 * This file holds definitions relevent to the wait4 system call

 * and the alternate interfaces that use it (wait, wait3, waitpid).

 */

/*

 * Macros to test the exit status returned by wait

 * and extract the relevant values.

 */

#ifdef _POSIX_SOURCE

#define        _W_INT(i)        (i)

#else

#define        _W_INT(w)        (*(int *)&(w))        /* convert union wait to int */

#define        WCOREFLAG        0200

#endif

#define        _WSTATUS(x)        (_W_INT(x) & 0177)

#define        _WSTOPPED        0177                /* _WSTATUS if process is stopped */

#define WIFSTOPPED(x)        (_WSTATUS(x) == _WSTOPPED)

#define WSTOPSIG(x)        (_W_INT(x) >> 8)

#define WIFSIGNALED(x)        (_WSTATUS(x) != _WSTOPPED && _WSTATUS(x) != 0)

#define WTERMSIG(x)        (_WSTATUS(x))

#define WIFEXITED(x)        (_WSTATUS(x) == 0)

#define WEXITSTATUS(x)        (_W_INT(x) >> 8)

#ifndef _POSIX_SOURCE

#define WCOREDUMP(x)        (_W_INT(x) & WCOREFLAG)

#define        W_EXITCODE(ret, sig)        ((ret) << 8 | (sig))

#define        W_STOPCODE(sig)                ((sig) << 8 | _WSTOPPED)

#endif

/*

 * Option bits for the third argument of wait4.  WNOHANG causes the

 * wait to not hang if there are no stopped or terminated processes, rather

 * returning an error indication in this case (pid==0).  WUNTRACED

 * indicates that the caller should receive status about untraced children

 * which stop due to signals.  If children are stopped and a wait without

 * this option is done, it is as though they were still running... nothing

 * about them is returned.

 */

#define WNOHANG                1        /* don't hang in wait */

#define WUNTRACED        2        /* tell about stopped, untraced children */

#ifndef _POSIX_SOURCE

/* POSIX extensions and 4.2/4.3 compatability: */

/*

 * Tokens for special values of the "pid" parameter to wait4.

 */

#define        WAIT_ANY        (-1)        /* any process */

#define        WAIT_MYPGRP        0        /* any process in my process group */

#include <sys/endian.h>

/*

 * Deprecated:

 * Structure of the information in the status word returned by wait4.

 * If w_stopval==WSTOPPED, then the second structure describes

 * the information returned, else the first.

 */

union wait {

        int        w_status;                /* used in syscall */

        /*

         * Terminated process status.

         */

        struct {

#if BYTE_ORDER == LITTLE_ENDIAN

                unsigned int        w_Termsig:7,        /* termination signal */

                                w_Coredump:1,        /* core dump indicator */

                                w_Retcode:8,        /* exit code if w_termsig==0 */

                                w_Filler:16;        /* upper bits filler */

#endif

#if BYTE_ORDER == BIG_ENDIAN

                unsigned int        w_Filler:16,        /* upper bits filler */

                                w_Retcode:8,        /* exit code if w_termsig==0 */

                                w_Coredump:1,        /* core dump indicator */

                                w_Termsig:7;        /* termination signal */

#endif

        } w_T;

        /*

         * Stopped process status.  Returned

         * only for traced children unless requested

         * with the WUNTRACED option bit.

         */

        struct {

#if BYTE_ORDER == LITTLE_ENDIAN

                unsigned int        w_Stopval:8,        /* == W_STOPPED if stopped */

                                w_Stopsig:8,        /* signal that stopped us */

                                w_Filler:16;        /* upper bits filler */

#endif

#if BYTE_ORDER == BIG_ENDIAN

                unsigned int        w_Filler:16,        /* upper bits filler */

                                w_Stopsig:8,        /* signal that stopped us */

                                w_Stopval:8;        /* == W_STOPPED if stopped */

#endif

        } w_S;

};

#define        w_termsig        w_T.w_Termsig

#define w_coredump        w_T.w_Coredump

#define w_retcode        w_T.w_Retcode

#define w_stopval        w_S.w_Stopval

#define w_stopsig        w_S.w_Stopsig

#define        WSTOPPED        _WSTOPPED

#endif /* _POSIX_SOURCE */

#ifndef KERNEL

#include <sys/types.h>

#include <sys/cdefs.h>

__BEGIN_DECLS

pid_t        wait(int *);

pid_t        waitpid(pid_t, int *, int);

__END_DECLS

#endif

#endif /* !_SYS_WAIT_H_ */