1 /* $OpenBSD: wait.h,v 1.20 2022/12/19 00:22:11 guenther Exp $ */ 2 /* $NetBSD: wait.h,v 1.11 1996/04/09 20:55:51 cgd Exp $ */ 3 4 /* 5 * Copyright (c) 1982, 1986, 1989, 1993, 1994 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)wait.h 8.2 (Berkeley) 7/10/94 33 */ 34 35 #ifndef _SYS_WAIT_H_ 36 #define _SYS_WAIT_H_ 37 38 #include <sys/cdefs.h> 39 #include <sys/siginfo.h> 40 41 /* 42 * This file holds definitions relevant to the wait4 system call 43 * and the alternate interfaces that use it (wait, wait3, waitpid). 44 */ 45 46 /* 47 * Macros to test the exit status returned by wait 48 * and extract the relevant values. 49 */ 50 #define _WSTATUS(x) ((x) & 0177) 51 #define _WSTOPPED 0177 /* _WSTATUS if process is stopped */ 52 #define _WCONTINUED 0177777 /* process has continued */ 53 #define WIFSTOPPED(x) (((x) & 0xff) == _WSTOPPED) 54 #define WSTOPSIG(x) (int)(((unsigned)(x) >> 8) & 0xff) 55 #define WIFSIGNALED(x) (_WSTATUS(x) != _WSTOPPED && _WSTATUS(x) != 0) 56 #define WTERMSIG(x) (_WSTATUS(x)) 57 #define WIFEXITED(x) (_WSTATUS(x) == 0) 58 #define WEXITSTATUS(x) (int)(((unsigned)(x) >> 8) & 0xff) 59 #define WIFCONTINUED(x) (((x) & _WCONTINUED) == _WCONTINUED) 60 #if __XPG_VISIBLE 61 #define WCOREFLAG 0200 62 #define WCOREDUMP(x) ((x) & WCOREFLAG) 63 64 #define W_EXITCODE(ret, sig) ((ret) << 8 | (sig)) 65 #define W_STOPCODE(sig) ((sig) << 8 | _WSTOPPED) 66 #endif 67 68 /* 69 * Option bits for the third argument of wait4. WNOHANG causes the 70 * wait to not hang if there are no stopped or terminated processes, rather 71 * returning an error indication in this case (pid==0). WUNTRACED 72 * indicates that the caller should receive status about untraced children 73 * which stop due to signals. If children are stopped and a wait without 74 * this option is done, it is as though they were still running... nothing 75 * about them is returned. WNOWAIT only requests information about zombie, 76 * leaving the proc around, available for later waits. 77 */ 78 #define WNOHANG 0x01 /* don't hang in wait */ 79 #define WUNTRACED 0x02 /* report stopped-by-signal processes */ 80 #define WCONTINUED 0x08 /* report job control continued processes */ 81 #if __POSIX_VISIBLE >= 200809 || __XPG_VISIBLE >= 420 82 #define WEXITED 0x04 /* report exited processes */ 83 #define WSTOPPED WUNTRACED 84 #define WNOWAIT 0x10 /* poll only */ 85 #define WTRAPPED 0x20 /* report stopped-by-tracing processes */ 86 87 typedef enum { 88 P_ALL, 89 P_PGID, 90 P_PID 91 } idtype_t; 92 #endif 93 94 #if __BSD_VISIBLE 95 /* 96 * Tokens for special values of the "pid" parameter to wait4. 97 */ 98 #define WAIT_ANY (-1) /* any process */ 99 #define WAIT_MYPGRP 0 /* any process in my process group */ 100 #endif /* __BSD_VISIBLE */ 101 102 #ifndef _KERNEL 103 #include <sys/types.h> 104 105 __BEGIN_DECLS 106 struct rusage; /* forward declaration */ 107 108 pid_t wait(int *); 109 pid_t waitpid(pid_t, int *, int); 110 #if __POSIX_VISIBLE >= 200809 || __XPG_VISIBLE >= 420 111 int waitid(idtype_t, id_t, siginfo_t *, int); 112 #endif 113 #if __BSD_VISIBLE 114 pid_t wait3(int *, int, struct rusage *); 115 pid_t wait4(pid_t, int *, int, struct rusage *); 116 #endif /* __BSD_VISIBLE */ 117 __END_DECLS 118 #endif /* !_KERNEL */ 119 120 #endif /* !_SYS_WAIT_H_ */ 121