187 lines
6.4 KiB
C
187 lines
6.4 KiB
C
/* $NetBSD: wait.h,v 1.26 2009/01/11 02:45:56 christos Exp $ */
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/*
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* Copyright (c) 1982, 1986, 1989, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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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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* @(#)wait.h 8.2 (Berkeley) 7/10/94
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*/
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#ifndef _SYS_WAIT_H_
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#define _SYS_WAIT_H_
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#include <sys/featuretest.h>
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/*
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* This file holds definitions relevent to the wait4 system call
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* and the alternate interfaces that use it (wait, wait3, waitpid).
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*/
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/*
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* Macros to test the exit status returned by wait
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* and extract the relevant values.
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*/
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#if !( defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE) ) || defined(_KERNEL)
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#define _W_INT(i) (i)
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#else
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#define _W_INT(w) (*(int *)(void *)&(w)) /* convert union wait to int */
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#endif
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#define _WSTATUS(x) (_W_INT(x) & 0177)
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#define _WSTOPPED 0177 /* _WSTATUS if process is stopped */
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#define WIFSTOPPED(x) (_WSTATUS(x) == _WSTOPPED)
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#define WSTOPSIG(x) ((int)(((unsigned int)_W_INT(x)) >> 8) & 0xff)
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#define WIFSIGNALED(x) (_WSTATUS(x) != _WSTOPPED && _WSTATUS(x) != 0)
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#define WTERMSIG(x) (_WSTATUS(x))
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#define WIFEXITED(x) (_WSTATUS(x) == 0)
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#define WEXITSTATUS(x) ((int)(((unsigned int)_W_INT(x)) >> 8) & 0xff)
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#if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE) || defined(_KERNEL)
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#define WCOREFLAG 0200
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#define WCOREDUMP(x) (_W_INT(x) & WCOREFLAG)
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#define W_EXITCODE(ret, sig) ((ret) << 8 | (sig))
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#define W_STOPCODE(sig) ((sig) << 8 | _WSTOPPED)
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#endif
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/*
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* Option bits for the third argument of wait4. WNOHANG causes the
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* wait to not hang if there are no stopped or terminated processes, rather
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* returning an error indication in this case (pid==0). WUNTRACED
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* indicates that the caller should receive status about untraced children
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* which stop due to signals. If children are stopped and a wait without
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* this option is done, it is as though they were still running... nothing
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* about them is returned.
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*/
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#define WNOHANG 0x00000001 /* don't hang in wait */
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#define WUNTRACED 0x00000002 /* tell about stopped,
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untraced children */
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#if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
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#define WALTSIG 0x00000004 /* wait for processes that exit
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with an alternate signal (i.e.
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not SIGCHLD) */
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#define WALLSIG 0x00000008 /* wait for processes that exit
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with any signal, i.e. SIGCHLD
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and alternates */
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/*
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* These are the Linux names of some of the above flags, for compatibility
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* with Linux's clone(2) API.
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*/
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#define __WCLONE WALTSIG
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#define __WALL WALLSIG
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/*
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* These bits are used in order to support SVR4 (etc) functionality
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* without replicating sys_wait4 5 times.
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*/
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#define WNOWAIT 0x00010000 /* Don't mark child 'P_WAITED' */
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#define WNOZOMBIE 0x00020000 /* Ignore zombies */
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#define WOPTSCHECKED 0x00040000 /* Compat call, options verified */
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#endif /* _XOPEN_SOURCE || _NETBSD_SOURCE */
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#if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
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/* POSIX extensions and 4.2/4.3 compatibility: */
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/*
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* Tokens for special values of the "pid" parameter to wait4.
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*/
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#define WAIT_ANY (-1) /* any process */
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#define WAIT_MYPGRP 0 /* any process in my process group */
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#include <sys/types.h>
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/*
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* Deprecated:
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* Structure of the information in the status word returned by wait4.
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* If w_stopval==WSTOPPED, then the second structure describes
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* the information returned, else the first.
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*/
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union wait {
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int w_status; /* used in syscall */
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/*
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* Terminated process status.
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*/
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struct {
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#if BYTE_ORDER == LITTLE_ENDIAN
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unsigned int w_Termsig:7, /* termination signal */
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w_Coredump:1, /* core dump indicator */
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w_Retcode:8, /* exit code if w_termsig==0 */
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w_Filler:16; /* upper bits filler */
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#endif
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#if BYTE_ORDER == BIG_ENDIAN
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unsigned int w_Filler:16, /* upper bits filler */
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w_Retcode:8, /* exit code if w_termsig==0 */
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w_Coredump:1, /* core dump indicator */
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w_Termsig:7; /* termination signal */
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#endif
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} w_T;
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/*
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* Stopped process status. Returned
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* only for traced children unless requested
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* with the WUNTRACED option bit.
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*/
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struct {
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#if BYTE_ORDER == LITTLE_ENDIAN
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unsigned int w_Stopval:8, /* == W_STOPPED if stopped */
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w_Stopsig:8, /* signal that stopped us */
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w_Filler:16; /* upper bits filler */
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#endif
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#if BYTE_ORDER == BIG_ENDIAN
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unsigned int w_Filler:16, /* upper bits filler */
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w_Stopsig:8, /* signal that stopped us */
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w_Stopval:8; /* == W_STOPPED if stopped */
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#endif
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} w_S;
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};
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#define w_termsig w_T.w_Termsig
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#define w_coredump w_T.w_Coredump
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#define w_retcode w_T.w_Retcode
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#define w_stopval w_S.w_Stopval
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#define w_stopsig w_S.w_Stopsig
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#define WSTOPPED _WSTOPPED
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#endif /* _XOPEN_SOURCE || _NETBSD_SOURCE */
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#ifndef _KERNEL
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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struct rusage; /* forward declaration */
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pid_t wait(int *);
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pid_t waitpid(pid_t, int *, int);
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#if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
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#ifndef __LIBC12_SOURCE__
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pid_t wait3(int *, int, struct rusage *) __RENAME(__wait350);
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pid_t wait4(pid_t, int *, int, struct rusage *) __RENAME(__wait450);
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#endif
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#endif
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__END_DECLS
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#endif
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#endif /* !_SYS_WAIT_H_ */
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