1 /* $NetBSD: wait.h,v 1.31 2016/07/07 06:55:44 msaitoh Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 1989, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)wait.h 8.2 (Berkeley) 7/10/94 32 */ 33 34 #ifndef _SYS_WAIT_H_ 35 #define _SYS_WAIT_H_ 36 37 #include <sys/featuretest.h> 38 #include <sys/types.h> 39 #include <sys/sigtypes.h> 40 #include <sys/siginfo.h> 41 #include <sys/idtype.h> 42 43 /* 44 * This file holds definitions relevent to the wait4 system call 45 * and the alternate interfaces that use it (wait, wait3, waitpid). 46 */ 47 48 /* 49 * Macros to test the exit status returned by wait 50 * and extract the relevant values. 51 */ 52 #if !( defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE) ) || defined(_KERNEL) 53 #define _W_INT(i) (i) 54 #else 55 #define _W_INT(w) (*(int *)(void *)&(w)) /* convert union wait to int */ 56 #endif 57 58 #define _WSTATUS(x) (_W_INT(x) & 0177) 59 #define _WSTOPPED 0177 /* _WSTATUS if process is stopped */ 60 #define _WCONTINUED 0xffffU 61 #define WIFSTOPPED(x) (_WSTATUS(x) == _WSTOPPED) 62 #define WIFCONTINUED(x) (_W_INT(x) == _WCONTINUED) 63 #define WSTOPSIG(x) ((int)(((unsigned int)_W_INT(x)) >> 8) & 0xff) 64 #define WIFSIGNALED(x) (_WSTATUS(x) != _WSTOPPED && _WSTATUS(x) != 0) 65 #define WTERMSIG(x) (_WSTATUS(x)) 66 #define WIFEXITED(x) (_WSTATUS(x) == 0) 67 #define WEXITSTATUS(x) ((int)(((unsigned int)_W_INT(x)) >> 8) & 0xff) 68 #if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE) || defined(_KERNEL) 69 #define WCOREFLAG 0200 70 #define WCOREDUMP(x) (_W_INT(x) & WCOREFLAG) 71 72 #define W_EXITCODE(ret, sig) ((ret) << 8 | (sig)) 73 #define W_STOPCODE(sig) ((sig) << 8 | _WSTOPPED) 74 #define W_CONTCODE() (_WCONTINUED) 75 #endif 76 77 /* 78 * Option bits for the third argument of wait4. WNOHANG causes the 79 * wait to not hang if there are no stopped or terminated processes, rather 80 * returning an error indication in this case (pid==0). WUNTRACED 81 * indicates that the caller should receive status about untraced children 82 * which stop due to signals. If children are stopped and a wait without 83 * this option is done, it is as though they were still running... nothing 84 * about them is returned. 85 */ 86 #define WNOHANG 0x00000001 /* don't hang in wait */ 87 #define WUNTRACED 0x00000002 /* tell about stopped, 88 untraced children */ 89 #define WSTOPPED WUNTRACED /* SUS compatibility */ 90 #if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE) 91 #define WALTSIG 0x00000004 /* wait for processes that exit 92 with an alternate signal (i.e. 93 not SIGCHLD) */ 94 #define WALLSIG 0x00000008 /* wait for processes that exit 95 with any signal, i.e. SIGCHLD 96 and alternates */ 97 #define WCONTINUED 0x00000010 /* Report a job control continued 98 process. */ 99 #define WEXITED 0x00000020 /* Wait for exited processes. */ 100 #define WTRAPPED 0x00000040 /* Wait for a process to hit a trap or 101 a breakpoint. */ 102 103 /* 104 * These are the Linux names of some of the above flags, for compatibility 105 * with Linux's clone(2) API. 106 */ 107 #define __WCLONE WALTSIG 108 #define __WALL WALLSIG 109 110 /* 111 * These bits are used in order to support SVR4 (etc) functionality 112 * without replicating sys_wait4 5 times. 113 */ 114 #define WNOWAIT 0x00010000 /* Don't mark child 'P_WAITED' */ 115 #define WNOZOMBIE 0x00020000 /* Ignore zombies */ 116 #define WOPTSCHECKED 0x00040000 /* Compat call, options verified */ 117 #endif /* _XOPEN_SOURCE || _NETBSD_SOURCE */ 118 119 #if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE) 120 /* POSIX extensions and 4.2/4.3 compatibility: */ 121 122 /* 123 * Tokens for special values of the "pid" parameter to wait4. 124 */ 125 #define WAIT_ANY (-1) /* any process */ 126 #define WAIT_MYPGRP 0 /* any process in my process group */ 127 128 #include <sys/types.h> 129 130 /* 131 * Deprecated: 132 * Structure of the information in the status word returned by wait4. 133 * If w_stopval==WSTOPPED, then the second structure describes 134 * the information returned, else the first. 135 */ 136 union wait { 137 int w_status; /* used in syscall */ 138 /* 139 * Terminated process status. 140 */ 141 struct { 142 #if BYTE_ORDER == LITTLE_ENDIAN 143 unsigned int w_Termsig:7, /* termination signal */ 144 w_Coredump:1, /* core dump indicator */ 145 w_Retcode:8, /* exit code if w_termsig==0 */ 146 w_Filler:16; /* upper bits filler */ 147 #endif 148 #if BYTE_ORDER == BIG_ENDIAN 149 unsigned int w_Filler:16, /* upper bits filler */ 150 w_Retcode:8, /* exit code if w_termsig==0 */ 151 w_Coredump:1, /* core dump indicator */ 152 w_Termsig:7; /* termination signal */ 153 #endif 154 } w_T; 155 /* 156 * Stopped process status. Returned 157 * only for traced children unless requested 158 * with the WUNTRACED option bit. 159 */ 160 struct { 161 #if BYTE_ORDER == LITTLE_ENDIAN 162 unsigned int w_Stopval:8, /* == W_STOPPED if stopped */ 163 w_Stopsig:8, /* signal that stopped us */ 164 w_Filler:16; /* upper bits filler */ 165 #endif 166 #if BYTE_ORDER == BIG_ENDIAN 167 unsigned int w_Filler:16, /* upper bits filler */ 168 w_Stopsig:8, /* signal that stopped us */ 169 w_Stopval:8; /* == W_STOPPED if stopped */ 170 #endif 171 } w_S; 172 }; 173 #define w_termsig w_T.w_Termsig 174 #define w_coredump w_T.w_Coredump 175 #define w_retcode w_T.w_Retcode 176 #define w_stopval w_S.w_Stopval 177 #define w_stopsig w_S.w_Stopsig 178 179 #endif /* _XOPEN_SOURCE || _NETBSD_SOURCE */ 180 181 #ifndef _KERNEL 182 #include <sys/cdefs.h> 183 184 __BEGIN_DECLS 185 struct rusage; /* forward declaration */ 186 struct wrusage; 187 188 pid_t wait(int *); 189 pid_t waitpid(pid_t, int *, int); 190 int waitid(idtype_t, id_t, siginfo_t *, int); 191 #if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE) 192 #ifndef __LIBC12_SOURCE__ 193 pid_t wait3(int *, int, struct rusage *) __RENAME(__wait350); 194 pid_t wait4(pid_t, int *, int, struct rusage *) __RENAME(__wait450); 195 pid_t wait6(idtype_t, id_t, int *, int, struct wrusage *, siginfo_t *); 196 #endif 197 #endif 198 __END_DECLS 199 #endif 200 201 #endif /* !_SYS_WAIT_H_ */ 202