/* $NetBSD: wait.h,v 1.39 2026/01/08 15:39:08 nia 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> #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 #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_ */
