1 /* 2 * Copyright (c) 1982, 1986, 1989, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)wait.h 8.2 (Berkeley) 7/10/94 30 * $FreeBSD: src/sys/sys/wait.h,v 1.11 1999/12/29 04:24:50 peter Exp $ 31 */ 32 33 #ifndef _SYS_WAIT_H_ 34 #define _SYS_WAIT_H_ 35 36 #include <sys/cdefs.h> 37 38 /* 39 * This file holds definitions relevant to the wait4 system call 40 * and the alternate interfaces that use it (wait, wait3, waitpid). 41 */ 42 43 /* 44 * Macros to test the exit status returned by wait 45 * and extract the relevant values. 46 */ 47 #if __BSD_VISIBLE 48 #define WCOREFLAG 0200 49 #endif 50 #define _W_INT(i) (i) 51 52 #define _WSTATUS(x) (_W_INT(x) & 0177) 53 #define _WSTOPPED 0177 /* _WSTATUS if process is stopped */ 54 #define WSTOPPED _WSTOPPED 55 #define WIFSTOPPED(x) (_WSTATUS(x) == _WSTOPPED) 56 #define WSTOPSIG(x) (_W_INT(x) >> 8) 57 #define WIFSIGNALED(x) (_WSTATUS(x) != _WSTOPPED && _WSTATUS(x) != 0) 58 #define WTERMSIG(x) (_WSTATUS(x)) 59 #define WIFEXITED(x) (_WSTATUS(x) == 0) 60 #define WEXITSTATUS(x) (_W_INT(x) >> 8) 61 #define WIFCONTINUED(x) (x == 19) /* 19 == SIGCONT */ 62 #if __BSD_VISIBLE 63 #define WCOREDUMP(x) (_W_INT(x) & WCOREFLAG) 64 65 #define W_EXITCODE(ret, sig) ((ret) << 8 | (sig)) 66 #define W_STOPCODE(sig) ((sig) << 8 | _WSTOPPED) 67 #endif 68 69 /* 70 * Option bits for the third argument of wait4. WNOHANG causes the 71 * wait to not hang if there are no stopped or terminated processes, rather 72 * returning an error indication in this case (pid==0). WUNTRACED 73 * indicates that the caller should receive status about untraced children 74 * which stop due to signals. If children are stopped and a wait without 75 * this option is done, it is as though they were still running... nothing 76 * about them is returned. 77 */ 78 #define WNOHANG 1 /* don't hang in wait */ 79 #define WUNTRACED 2 /* tell about stopped, untraced children */ 80 #define WCONTINUED 4 /* Report a job control continued process. */ 81 #if __BSD_VISIBLE 82 #define WLINUXCLONE 0x80000000 /* wait for kthread spawned from linux_clone */ 83 84 /* 85 * Tokens for special values of the "pid" parameter to wait4. 86 */ 87 #define WAIT_ANY (-1) /* any process */ 88 #define WAIT_MYPGRP 0 /* any process in my process group */ 89 #endif /* __BSD_VISIBLE */ 90 91 #if !defined(_KERNEL) || defined(_KERNEL_VIRTUAL) 92 #ifndef _SYS_TYPES_H_ 93 #include <sys/types.h> 94 #endif 95 96 __BEGIN_DECLS 97 pid_t wait(int *); 98 pid_t waitpid(pid_t, int *, int); 99 #if __XSI_VISIBLE < 600 || __BSD_VISIBLE 100 struct rusage; 101 pid_t wait3(int *, int, struct rusage *); 102 #endif 103 #if __BSD_VISIBLE 104 pid_t wait4(pid_t, int *, int, struct rusage *); 105 #endif 106 __END_DECLS 107 #endif 108 109 #endif 110