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/* $NetBSD: wait.h,v 1.38 2022/08/07 11:06:19 andvar 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
* 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_
#include <sys/featuretest.h>
#include <sys/types.h>
#include <sys/sigtypes.h>
#include <sys/siginfo.h>
#include <sys/idtype.h>
/*
* This file holds definitions relevant 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.
*/
#if !( defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE) ) || defined(_KERNEL)
#define _W_INT(i) (i)
#else
#define _W_INT(w) (*(int *)(void *)&(w)) /* convert union wait to int */
#endif
#define _WSTATUS(x) (_W_INT(x) & 0177)
#define _WSTOPPED 0177 /* _WSTATUS if process is stopped */
#define _WCONTINUED 0xffffU
#define WIFSTOPPED(x) (_WSTATUS(x) == _WSTOPPED && !WIFCONTINUED(x))
#define WIFCONTINUED(x) (_W_INT(x) == _WCONTINUED)
#define WSTOPSIG(x) ((int)(((unsigned int)_W_INT(x)) >> 8) & 0xff)
#define WIFSIGNALED(x) (!WIFSTOPPED(x) && !WIFCONTINUED(x) && !WIFEXITED(x))
#define WTERMSIG(x) (_WSTATUS(x))
#define WIFEXITED(x) (_WSTATUS(x) == 0)
#define WEXITSTATUS(x) ((int)(((unsigned int)_W_INT(x)) >> 8) & 0xff)
#if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE) || defined(_KERNEL)
#define WCOREFLAG 0200
#define WCOREDUMP(x) (_W_INT(x) & WCOREFLAG)
#define W_EXITCODE(ret, sig) ((unsigned int)(ret) << 8 | (sig))
#define W_STOPCODE(sig) ((sig) << 8 | _WSTOPPED)
#define W_CONTCODE() (_WCONTINUED)
#endif
/*
* POSIX option bits for the "options" argument of wait{3,4,6} wait{,p}id:
*
* 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).
*
* WSTOPPED/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.
*
* WCONTINUED
* Returns information for children that were continued from job
* control.
*
* WEXITED
* Is the default for wait/wait3/wait4/waitpid (to report children
* that have exited), but needs to be explicitly specified for
* waitid/wait6.
*
* WNOWAIT
* Returns information about the children without reaping them
* (changing their status to have been already waited for).
*/
#define WNOHANG 0x00000001 /* don't hang in wait */
#define WSTOPPED 0x00000002 /* include stopped/untraced children */
#define WUNTRACED WSTOPPED /* the original name for WSTOPPED */
#define WCONTINUED 0x00000010 /* include continued processes */
#define WEXITED 0x00000020 /* Wait for exited processes. */
#define WNOWAIT 0x00010000 /* Don't mark child 'P_WAITED' */
#if defined(_NETBSD_SOURCE)
#define WALTSIG 0x00000004 /* wait for processes that exit
with an alternate signal (i.e.
not SIGCHLD) */
#define WALLSIG 0x00000008 /* wait for processes that exit
with any signal, i.e. SIGCHLD
and alternates */
#define WTRAPPED 0x00000040 /* Wait for a process to hit a trap or
a breakpoint. */
#define WNOZOMBIE 0x00020000 /* Ignore zombies */
/*
* These are the Linux names of some of the above flags, for compatibility
* with Linux's clone(2) API.
*/
#define __WCLONE WALTSIG
#define __WALL WALLSIG
#endif /* _NETBSD_SOURCE */
#ifdef _KERNEL
#define WSELECTOPTS (WEXITED|WUNTRACED|WCONTINUED|WTRAPPED)
#define WALLOPTS (WNOHANG|WALTSIG|WALLSIG|WNOWAIT|WNOZOMBIE|WSELECTOPTS)
#endif /* _KERNEL */
#if defined(_NETBSD_SOURCE) || defined(_XOPEN_SOURCE)
/* POSIX extensions and 4.2/4.3 compatibility: */
/*
* 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/types.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
#endif /* _XOPEN_SOURCE || _NETBSD_SOURCE */
#ifndef _KERNEL
#include <sys/cdefs.h>
__BEGIN_DECLS
struct rusage; /* forward declaration */
struct wrusage;
pid_t wait(int *);
pid_t waitpid(pid_t, int *, int);
int waitid(idtype_t, id_t, siginfo_t *, int);
#if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
#ifndef __LIBC12_SOURCE__
pid_t wait3(int *, int, struct rusage *) __RENAME(__wait350);
pid_t wait4(pid_t, int *, int, struct rusage *) __RENAME(__wait450);
pid_t wait6(idtype_t, id_t, int *, int, struct wrusage *, siginfo_t *);
#endif
#endif
__END_DECLS
#endif
#endif /* !_SYS_WAIT_H_ */
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