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 * $FreeBSD: src/sys/sys/wait.h,v 1.11 1999/12/29 04:24:50 peter Exp $ 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 #define WIFCONTINUED(x) (x == 19) /* 19 == SIGCONT */ 65 #ifndef _POSIX_SOURCE 66 #define WCOREDUMP(x) (_W_INT(x) & WCOREFLAG) 67 68 #define W_EXITCODE(ret, sig) ((ret) << 8 | (sig)) 69 #define W_STOPCODE(sig) ((sig) << 8 | _WSTOPPED) 70 #endif 71 72 /* 73 * Option bits for the third argument of wait4. WNOHANG causes the 74 * wait to not hang if there are no stopped or terminated processes, rather 75 * returning an error indication in this case (pid==0). WUNTRACED 76 * indicates that the caller should receive status about untraced children 77 * which stop due to signals. If children are stopped and a wait without 78 * this option is done, it is as though they were still running... nothing 79 * about them is returned. 80 */ 81 #define WNOHANG 1 /* don't hang in wait */ 82 #define WUNTRACED 2 /* tell about stopped, untraced children */ 83 #define WCONTINUED 4 /* Report a job control continued process. */ 84 #define WLINUXCLONE 0x80000000 /* wait for kthread spawned from linux_clone */ 85 86 #ifndef _POSIX_SOURCE 87 /* POSIX extensions and 4.2/4.3 compatibility: */ 88 89 /* 90 * Tokens for special values of the "pid" parameter to wait4. 91 */ 92 #define WAIT_ANY (-1) /* any process */ 93 #define WAIT_MYPGRP 0 /* any process in my process group */ 94 95 #include <machine/endian.h> 96 97 /* 98 * Deprecated: 99 * Structure of the information in the status word returned by wait4. 100 * If w_stopval==WSTOPPED, then the second structure describes 101 * the information returned, else the first. 102 */ 103 union wait { 104 int w_status; /* used in syscall */ 105 /* 106 * Terminated process status. 107 */ 108 struct { 109 #if _BYTE_ORDER == _LITTLE_ENDIAN 110 unsigned int w_Termsig:7, /* termination signal */ 111 w_Coredump:1, /* core dump indicator */ 112 w_Retcode:8, /* exit code if w_termsig==0 */ 113 w_Filler:16; /* upper bits filler */ 114 #elif _BYTE_ORDER == _BIG_ENDIAN 115 unsigned int w_Filler:16, /* upper bits filler */ 116 w_Retcode:8, /* exit code if w_termsig==0 */ 117 w_Coredump:1, /* core dump indicator */ 118 w_Termsig:7; /* termination signal */ 119 #else 120 #error "Byte order not implemented" 121 #endif 122 } w_T; 123 /* 124 * Stopped process status. Returned 125 * only for traced children unless requested 126 * with the WUNTRACED option bit. 127 */ 128 struct { 129 #if _BYTE_ORDER == _LITTLE_ENDIAN 130 unsigned int w_Stopval:8, /* == W_STOPPED if stopped */ 131 w_Stopsig:8, /* signal that stopped us */ 132 w_Filler:16; /* upper bits filler */ 133 #elif _BYTE_ORDER == _BIG_ENDIAN 134 unsigned int w_Filler:16, /* upper bits filler */ 135 w_Stopsig:8, /* signal that stopped us */ 136 w_Stopval:8; /* == W_STOPPED if stopped */ 137 #else 138 #error "Byte order not implemented" 139 #endif 140 } w_S; 141 }; 142 #define w_termsig w_T.w_Termsig 143 #define w_coredump w_T.w_Coredump 144 #define w_retcode w_T.w_Retcode 145 #define w_stopval w_S.w_Stopval 146 #define w_stopsig w_S.w_Stopsig 147 148 #define WSTOPPED _WSTOPPED 149 #endif /* _POSIX_SOURCE */ 150 151 #if !defined(_KERNEL) || defined(_KERNEL_VIRTUAL) 152 #ifndef _SYS_TYPES_H_ 153 #include <sys/types.h> 154 #endif 155 #ifndef _SYS_CDEFS_H_ 156 #include <sys/cdefs.h> 157 #endif 158 159 __BEGIN_DECLS 160 struct rusage; /* forward declaration */ 161 162 pid_t wait (int *); 163 pid_t waitpid (pid_t, int *, int); 164 #ifndef _POSIX_SOURCE 165 pid_t wait3 (int *, int, struct rusage *); 166 pid_t wait4 (pid_t, int *, int, struct rusage *); 167 #endif 168 __END_DECLS 169 #endif 170 171 #endif 172