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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)wait.h 8.2 (Berkeley) 7/10/94 34 * $Id$ 35 */ 36 37 #ifndef _SYS_WAIT_H_ 38 #define _SYS_WAIT_H_ 39 40 /* 41 * This file holds definitions relevant to the wait4 system call 42 * and the alternate interfaces that use it (wait, wait3, waitpid). 43 */ 44 45 /* 46 * Macros to test the exit status returned by wait 47 * and extract the relevant values. 48 */ 49 #ifdef _POSIX_SOURCE 50 #define _W_INT(i) (i) 51 #else 52 #define _W_INT(w) (*(int *)&(w)) /* convert union wait to int */ 53 #define WCOREFLAG 0200 54 #endif 55 56 #define _WSTATUS(x) (_W_INT(x) & 0177) 57 #define _WSTOPPED 0177 /* _WSTATUS if process is stopped */ 58 #define WIFSTOPPED(x) (_WSTATUS(x) == _WSTOPPED) 59 #define WSTOPSIG(x) (_W_INT(x) >> 8) 60 #define WIFSIGNALED(x) (_WSTATUS(x) != _WSTOPPED && _WSTATUS(x) != 0) 61 #define WTERMSIG(x) (_WSTATUS(x)) 62 #define WIFEXITED(x) (_WSTATUS(x) == 0) 63 #define WEXITSTATUS(x) (_W_INT(x) >> 8) 64 #ifndef _POSIX_SOURCE 65 #define WCOREDUMP(x) (_W_INT(x) & WCOREFLAG) 66 67 #define W_EXITCODE(ret, sig) ((ret) << 8 | (sig)) 68 #define W_STOPCODE(sig) ((sig) << 8 | _WSTOPPED) 69 #endif 70 71 /* 72 * Option bits for the third argument of wait4. WNOHANG causes the 73 * wait to not hang if there are no stopped or terminated processes, rather 74 * returning an error indication in this case (pid==0). WUNTRACED 75 * indicates that the caller should receive status about untraced children 76 * which stop due to signals. If children are stopped and a wait without 77 * this option is done, it is as though they were still running... nothing 78 * about them is returned. 79 */ 80 #define WNOHANG 1 /* don't hang in wait */ 81 #define WUNTRACED 2 /* tell about stopped, untraced children */ 82 83 #ifndef _POSIX_SOURCE 84 /* POSIX extensions and 4.2/4.3 compatibility: */ 85 86 /* 87 * Tokens for special values of the "pid" parameter to wait4. 88 */ 89 #define WAIT_ANY (-1) /* any process */ 90 #define WAIT_MYPGRP 0 /* any process in my process group */ 91 92 #include <machine/endian.h> 93 94 /* 95 * Deprecated: 96 * Structure of the information in the status word returned by wait4. 97 * If w_stopval==WSTOPPED, then the second structure describes 98 * the information returned, else the first. 99 */ 100 union wait { 101 int w_status; /* used in syscall */ 102 /* 103 * Terminated process status. 104 */ 105 struct { 106 #if BYTE_ORDER == LITTLE_ENDIAN 107 unsigned int w_Termsig:7, /* termination signal */ 108 w_Coredump:1, /* core dump indicator */ 109 w_Retcode:8, /* exit code if w_termsig==0 */ 110 w_Filler:16; /* upper bits filler */ 111 #endif 112 #if BYTE_ORDER == BIG_ENDIAN 113 unsigned int w_Filler:16, /* upper bits filler */ 114 w_Retcode:8, /* exit code if w_termsig==0 */ 115 w_Coredump:1, /* core dump indicator */ 116 w_Termsig:7; /* termination signal */ 117 #endif 118 } w_T; 119 /* 120 * Stopped process status. Returned 121 * only for traced children unless requested 122 * with the WUNTRACED option bit. 123 */ 124 struct { 125 #if BYTE_ORDER == LITTLE_ENDIAN 126 unsigned int w_Stopval:8, /* == W_STOPPED if stopped */ 127 w_Stopsig:8, /* signal that stopped us */ 128 w_Filler:16; /* upper bits filler */ 129 #endif 130 #if BYTE_ORDER == BIG_ENDIAN 131 unsigned int w_Filler:16, /* upper bits filler */ 132 w_Stopsig:8, /* signal that stopped us */ 133 w_Stopval:8; /* == W_STOPPED if stopped */ 134 #endif 135 } w_S; 136 }; 137 #define w_termsig w_T.w_Termsig 138 #define w_coredump w_T.w_Coredump 139 #define w_retcode w_T.w_Retcode 140 #define w_stopval w_S.w_Stopval 141 #define w_stopsig w_S.w_Stopsig 142 143 #define WSTOPPED _WSTOPPED 144 #endif /* _POSIX_SOURCE */ 145 146 #ifndef KERNEL 147 #include <sys/types.h> 148 #include <sys/cdefs.h> 149 150 __BEGIN_DECLS 151 struct rusage; /* forward declaration */ 152 153 pid_t wait __P((int *)); 154 pid_t waitpid __P((pid_t, int *, int)); 155 #ifndef _POSIX_SOURCE 156 pid_t wait3 __P((int *, int, struct rusage *)); 157 pid_t wait4 __P((pid_t, int *, int, struct rusage *)); 158 #endif 159 __END_DECLS 160 #endif 161 162 #endif 163