121 lines
4.4 KiB
C
121 lines
4.4 KiB
C
/* $OpenBSD: wait.h,v 1.20 2022/12/19 00:22:11 guenther Exp $ */
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/* $NetBSD: wait.h,v 1.11 1996/04/09 20:55:51 cgd 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/cdefs.h>
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#include <sys/siginfo.h>
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/*
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* This file holds definitions relevant 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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#define _WSTATUS(x) ((x) & 0177)
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#define _WSTOPPED 0177 /* _WSTATUS if process is stopped */
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#define _WCONTINUED 0177777 /* process has continued */
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#define WIFSTOPPED(x) (((x) & 0xff) == _WSTOPPED)
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#define WSTOPSIG(x) (int)(((unsigned)(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)(x) >> 8) & 0xff)
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#define WIFCONTINUED(x) (((x) & _WCONTINUED) == _WCONTINUED)
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#if __XPG_VISIBLE
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#define WCOREFLAG 0200
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#define WCOREDUMP(x) ((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. WNOWAIT only requests information about zombie,
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* leaving the proc around, available for later waits.
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*/
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#define WNOHANG 0x01 /* don't hang in wait */
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#define WUNTRACED 0x02 /* report stopped-by-signal processes */
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#define WCONTINUED 0x08 /* report job control continued processes */
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#if __POSIX_VISIBLE >= 200809 || __XPG_VISIBLE >= 420
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#define WEXITED 0x04 /* report exited processes */
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#define WSTOPPED WUNTRACED
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#define WNOWAIT 0x10 /* poll only */
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#define WTRAPPED 0x20 /* report stopped-by-tracing processes */
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typedef enum {
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P_ALL,
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P_PGID,
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P_PID
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} idtype_t;
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#endif
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#if __BSD_VISIBLE
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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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#endif /* __BSD_VISIBLE */
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#ifndef _KERNEL
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#include <sys/types.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 __POSIX_VISIBLE >= 200809 || __XPG_VISIBLE >= 420
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int waitid(idtype_t, id_t, siginfo_t *, int);
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#endif
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#if __BSD_VISIBLE
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pid_t wait3(int *, int, struct rusage *);
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pid_t wait4(pid_t, int *, int, struct rusage *);
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#endif /* __BSD_VISIBLE */
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__END_DECLS
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#endif /* !_KERNEL */
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#endif /* !_SYS_WAIT_H_ */
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