FreeBSD/Linux Kernel Cross Reference
sys/sys/wait.h
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 * 4. 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: releng/6.0/sys/sys/wait.h 139739 2005-01-05 22:19:44Z jhb $
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 and the
40 * alternate interfaces that use it (wait, wait3, waitpid).
41 */
42
43 /*
44 * Macros to test the exit status returned by wait and extract the relevant
45 * values.
46 */
47 #if __BSD_VISIBLE
48 #define _W_INT(w) (*(int *)&(w)) /* Convert union wait to int. */
49 #define WCOREFLAG 0200
50 #else
51 #define _W_INT(i) (i)
52 #endif
53
54 #define _WSTATUS(x) (_W_INT(x) & 0177)
55 #define _WSTOPPED 0177 /* _WSTATUS if process is stopped */
56 #define WIFSTOPPED(x) (_WSTATUS(x) == _WSTOPPED)
57 #define WSTOPSIG(x) (_W_INT(x) >> 8)
58 #define WIFSIGNALED(x) (_WSTATUS(x) != _WSTOPPED && _WSTATUS(x) != 0)
59 #define WTERMSIG(x) (_WSTATUS(x))
60 #define WIFEXITED(x) (_WSTATUS(x) == 0)
61 #define WEXITSTATUS(x) (_W_INT(x) >> 8)
62 #define WIFCONTINUED(x) (x == 0x13) /* 0x13 == SIGCONT */
63 #if __BSD_VISIBLE
64 #define WCOREDUMP(x) (_W_INT(x) & WCOREFLAG)
65
66 #define W_EXITCODE(ret, sig) ((ret) << 8 | (sig))
67 #define W_STOPCODE(sig) ((sig) << 8 | _WSTOPPED)
68 #endif
69
70 /*
71 * Option bits for the third argument of wait4. WNOHANG causes the
72 * wait to not hang if there are no stopped or terminated processes, rather
73 * returning an error indication in this case (pid==0). WUNTRACED
74 * indicates that the caller should receive status about untraced children
75 * which stop due to signals. If children are stopped and a wait without
76 * this option is done, it is as though they were still running... nothing
77 * about them is returned.
78 */
79 #define WNOHANG 1 /* Don't hang in wait. */
80 #define WUNTRACED 2 /* Tell about stopped, untraced children. */
81 #define WCONTINUED 4 /* Report a job control continued process. */
82
83 #if __BSD_VISIBLE
84 #define WLINUXCLONE 0x80000000 /* Wait for kthread spawned from linux_clone. */
85 #endif
86
87 /*
88 * Tokens for special values of the "pid" parameter to wait4.
89 */
90 #if __BSD_VISIBLE
91 #define WAIT_ANY (-1) /* any process */
92 #define WAIT_MYPGRP 0 /* any process in my process group */
93 #endif /* __BSD_VISIBLE */
94
95 #ifndef _KERNEL
96 #include <sys/types.h>
97
98 __BEGIN_DECLS
99 pid_t wait(int *);
100 pid_t waitpid(pid_t, int *, int);
101 #if __BSD_VISIBLE
102 struct rusage;
103 pid_t wait3(int *, int, struct rusage *);
104 pid_t wait4(pid_t, int *, int, struct rusage *);
105 #endif
106 __END_DECLS
107 #endif /* !_KERNEL */
108
109 #endif /* !_SYS_WAIT_H_ */
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