1/*
2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
29/*
30 * Copyright (c) 1982, 1986, 1989, 1993, 1994
31 * The Regents of the University of California. All rights reserved.
32 *
33 * Redistribution and use in source and binary forms, with or without
34 * modification, are permitted provided that the following conditions
35 * are met:
36 * 1. Redistributions of source code must retain the above copyright
37 * notice, this list of conditions and the following disclaimer.
38 * 2. Redistributions in binary form must reproduce the above copyright
39 * notice, this list of conditions and the following disclaimer in the
40 * documentation and/or other materials provided with the distribution.
41 * 3. All advertising materials mentioning features or use of this software
42 * must display the following acknowledgement:
43 * This product includes software developed by the University of
44 * California, Berkeley and its contributors.
45 * 4. Neither the name of the University nor the names of its contributors
46 * may be used to endorse or promote products derived from this software
47 * without specific prior written permission.
48 *
49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
59 * SUCH DAMAGE.
60 *
61 * @(#)wait.h 8.2 (Berkeley) 7/10/94
62 */
63
64#ifndef _SYS_WAIT_H_
65#define _SYS_WAIT_H_
66
67#include <sys/cdefs.h>
68#include <sys/_types.h>
69
70/*
71 * This file holds definitions relevent to the wait4 system call
72 * and the alternate interfaces that use it (wait, wait3, waitpid).
73 */
74
75/*
76 * [XSI] The type idtype_t shall be defined as an enumeration type whose
77 * possible values shall include at least P_ALL, P_PID, and P_PGID.
78 */
79typedef enum {
80 P_ALL,
81 P_PID,
82 P_PGID
83} idtype_t;
84
85/*
86 * [XSI] The id_t and pid_t types shall be defined as described
87 * in <sys/types.h>
88 */
89#include <sys/_types/_pid_t.h>
90#include <sys/_types/_id_t.h>
91
92/*
93 * [XSI] The siginfo_t type shall be defined as described in <signal.h>
94 * [XSI] The rusage structure shall be defined as described in <sys/resource.h>
95 * [XSI] Inclusion of the <sys/wait.h> header may also make visible all
96 * symbols from <signal.h> and <sys/resource.h>
97 *
98 * NOTE: This requirement is currently being satisfied by the direct
99 * inclusion of <sys/signal.h> and <sys/resource.h>, below.
100 *
101 * Software should not depend on the exposure of anything other
102 * than the types siginfo_t and struct rusage as a result of
103 * this inclusion. If you depend on any types or manifest
104 * values othe than siginfo_t and struct rusage from either of
105 * those files, you should explicitly include them yourself, as
106 * well, or in future releases your stware may not compile
107 * without modification.
108 */
109#include <sys/signal.h> /* [XSI] for siginfo_t */
110#include <sys/resource.h> /* [XSI] for struct rusage */
111
112/*
113 * Option bits for the third argument of wait4. WNOHANG causes the
114 * wait to not hang if there are no stopped or terminated processes, rather
115 * returning an error indication in this case (pid==0). WUNTRACED
116 * indicates that the caller should receive status about untraced children
117 * which stop due to signals. If children are stopped and a wait without
118 * this option is done, it is as though they were still running... nothing
119 * about them is returned.
120 */
121#define WNOHANG 0x00000001 /* [XSI] no hang in wait/no child to reap */
122#define WUNTRACED 0x00000002 /* [XSI] notify on stop, untraced child */
123
124/*
125 * Macros to test the exit status returned by wait
126 * and extract the relevant values.
127 */
128#if defined(_POSIX_C_SOURCE) && !defined(_DARWIN_C_SOURCE)
129#define _W_INT(i) (i)
130#else
131#define _W_INT(w) (*(int *)&(w)) /* convert union wait to int */
132#define WCOREFLAG 0200
133#endif /* (_POSIX_C_SOURCE && !_DARWIN_C_SOURCE) */
134
135/* These macros are permited, as they are in the implementation namespace */
136#define _WSTATUS(x) (_W_INT(x) & 0177)
137#define _WSTOPPED 0177 /* _WSTATUS if process is stopped */
138
139/*
140 * [XSI] The <sys/wait.h> header shall define the following macros for
141 * analysis of process status values
142 */
143#if __DARWIN_UNIX03
144#define WEXITSTATUS(x) ((_W_INT(x) >> 8) & 0x000000ff)
145#else /* !__DARWIN_UNIX03 */
146#define WEXITSTATUS(x) (_W_INT(x) >> 8)
147#endif /* !__DARWIN_UNIX03 */
148/* 0x13 == SIGCONT */
149#define WSTOPSIG(x) (_W_INT(x) >> 8)
150#define WIFCONTINUED(x) (_WSTATUS(x) == _WSTOPPED && WSTOPSIG(x) == 0x13)
151#define WIFSTOPPED(x) (_WSTATUS(x) == _WSTOPPED && WSTOPSIG(x) != 0x13)
152#define WIFEXITED(x) (_WSTATUS(x) == 0)
153#define WIFSIGNALED(x) (_WSTATUS(x) != _WSTOPPED && _WSTATUS(x) != 0)
154#define WTERMSIG(x) (_WSTATUS(x))
155#if (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE))
156#define WCOREDUMP(x) (_W_INT(x) & WCOREFLAG)
157
158#define W_EXITCODE(ret, sig) ((ret) << 8 | (sig))
159#define W_STOPCODE(sig) ((sig) << 8 | _WSTOPPED)
160#endif /* (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)) */
161
162/*
163 * [XSI] The following symbolic constants shall be defined as possible
164 * values for the fourth argument to waitid().
165 */
166/* WNOHANG already defined for wait4() */
167/* WUNTRACED defined for wait4() but not for waitid() */
168#define WEXITED 0x00000004 /* [XSI] Processes which have exitted */
169#if __DARWIN_UNIX03
170/* waitid() parameter */
171#define WSTOPPED 0x00000008 /* [XSI] Any child stopped by signal */
172#endif
173#define WCONTINUED 0x00000010 /* [XSI] Any child stopped then continued */
174#define WNOWAIT 0x00000020 /* [XSI] Leave process returned waitable */
175
176
177#if (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE))
178/* POSIX extensions and 4.2/4.3 compatability: */
179
180/*
181 * Tokens for special values of the "pid" parameter to wait4.
182 */
183#define WAIT_ANY (-1) /* any process */
184#define WAIT_MYPGRP 0 /* any process in my process group */
185
186#include <machine/endian.h>
187
188/*
189 * Deprecated:
190 * Structure of the information in the status word returned by wait4.
191 * If w_stopval==_WSTOPPED, then the second structure describes
192 * the information returned, else the first.
193 */
194union wait {
195 int w_status; /* used in syscall */
196 /*
197 * Terminated process status.
198 */
199 struct {
200#if __DARWIN_BYTE_ORDER == __DARWIN_LITTLE_ENDIAN
201 unsigned int w_Termsig:7, /* termination signal */
202 w_Coredump:1, /* core dump indicator */
203 w_Retcode:8, /* exit code if w_termsig==0 */
204 w_Filler:16; /* upper bits filler */
205#endif
206#if __DARWIN_BYTE_ORDER == __DARWIN_BIG_ENDIAN
207 unsigned int w_Filler:16, /* upper bits filler */
208 w_Retcode:8, /* exit code if w_termsig==0 */
209 w_Coredump:1, /* core dump indicator */
210 w_Termsig:7; /* termination signal */
211#endif
212 } w_T;
213 /*
214 * Stopped process status. Returned
215 * only for traced children unless requested
216 * with the WUNTRACED option bit.
217 */
218 struct {
219#if __DARWIN_BYTE_ORDER == __DARWIN_LITTLE_ENDIAN
220 unsigned int w_Stopval:8, /* == W_STOPPED if stopped */
221 w_Stopsig:8, /* signal that stopped us */
222 w_Filler:16; /* upper bits filler */
223#endif
224#if __DARWIN_BYTE_ORDER == __DARWIN_BIG_ENDIAN
225 unsigned int w_Filler:16, /* upper bits filler */
226 w_Stopsig:8, /* signal that stopped us */
227 w_Stopval:8; /* == W_STOPPED if stopped */
228#endif
229 } w_S;
230};
231#define w_termsig w_T.w_Termsig
232#define w_coredump w_T.w_Coredump
233#define w_retcode w_T.w_Retcode
234#define w_stopval w_S.w_Stopval
235#define w_stopsig w_S.w_Stopsig
236
237#endif /* (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)) */
238
239#if !(__DARWIN_UNIX03 - 0)
240/*
241 * Stopped state value; cannot use waitid() parameter of the same name
242 * in the same scope
243 */
244#define WSTOPPED _WSTOPPED
245#endif /* !__DARWIN_UNIX03 */
246
247#ifndef KERNEL
248__BEGIN_DECLS
249pid_t wait(int *) __DARWIN_ALIAS_C(wait);
250pid_t waitpid(pid_t, int *, int) __DARWIN_ALIAS_C(waitpid);
251#ifndef _ANSI_SOURCE
252int waitid(idtype_t, id_t, siginfo_t *, int) __DARWIN_ALIAS_C(waitid);
253#endif /* !_ANSI_SOURCE */
254#if (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE))
255pid_t wait3(int *, int, struct rusage *);
256pid_t wait4(pid_t, int *, int, struct rusage *);
257#endif /* (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)) */
258__END_DECLS
259#endif
260#endif /* !_SYS_WAIT_H_ */
261