wait.h revision 4fd606d1f5abe38e1f42c38de1d2e895166bd0f4
/* $NetBSD: wait.h,v 1.24 2005/12/11 12:25:21 christos Exp $ */
/*
* 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
* 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_
#include <sys/featuretest.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.
*/
#define _W_INT(w) (*(int *)(void *)&(w)) /* convert union wait to int */
#define WCOREFLAG 0200
/*
* 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.
*/
untraced children */
#if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
with an alternate signal (i.e.
not SIGCHLD) */
with any signal, i.e. SIGCHLD
and alternates */
/*
* These are the Linux names of some of the above flags, for compatibility
* with Linux's clone(2) API.
*/
/*
* These bits are used in order to support SVR4 (etc) functionality
* without replicating sys_wait4 5 times.
*/
#endif /* _XOPEN_SOURCE || _NETBSD_SOURCE */
/* POSIX extensions and 4.2/4.3 compatibility: */
/*
* Tokens for special values of the "pid" parameter to wait4.
*/
#define WAIT_MYPGRP 0 /* any process in my process group */
/*
* 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
#endif
#if BYTE_ORDER == BIG_ENDIAN
#endif
} w_T;
/*
* Stopped process status. Returned
* only for traced children unless requested
* with the WUNTRACED option bit.
*/
struct {
#if BYTE_ORDER == LITTLE_ENDIAN
#endif
#if BYTE_ORDER == BIG_ENDIAN
#endif
} w_S;
};
#if 0 /* Normally declared here but not implemented for UEFI. */
struct rusage; /* forward declaration */
#endif
#endif /* !_SYS_WAIT_H_ */