Change sendfile() to use the new m_ext callback scheme for cleaning up after
[dragonfly.git] / sys / sys / wait.h
CommitLineData
984263bc
MD
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 $
b153f746 35 * $DragonFly: src/sys/sys/wait.h,v 1.3 2003/08/20 07:31:22 rob Exp $
984263bc
MD
36 */
37
38#ifndef _SYS_WAIT_H_
39#define _SYS_WAIT_H_
40
41/*
42 * This file holds definitions relevant to the wait4 system call
43 * and the alternate interfaces that use it (wait, wait3, waitpid).
44 */
45
46/*
47 * Macros to test the exit status returned by wait
48 * and extract the relevant values.
49 */
50#ifdef _POSIX_SOURCE
51#define _W_INT(i) (i)
52#else
53#define _W_INT(w) (*(int *)&(w)) /* convert union wait to int */
54#define WCOREFLAG 0200
55#endif
56
57#define _WSTATUS(x) (_W_INT(x) & 0177)
58#define _WSTOPPED 0177 /* _WSTATUS if process is stopped */
59#define WIFSTOPPED(x) (_WSTATUS(x) == _WSTOPPED)
60#define WSTOPSIG(x) (_W_INT(x) >> 8)
61#define WIFSIGNALED(x) (_WSTATUS(x) != _WSTOPPED && _WSTATUS(x) != 0)
62#define WTERMSIG(x) (_WSTATUS(x))
63#define WIFEXITED(x) (_WSTATUS(x) == 0)
64#define WEXITSTATUS(x) (_W_INT(x) >> 8)
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 WLINUXCLONE 0x80000000 /* wait for kthread spawned from linux_clone */
84
85#ifndef _POSIX_SOURCE
86/* POSIX extensions and 4.2/4.3 compatibility: */
87
88/*
89 * Tokens for special values of the "pid" parameter to wait4.
90 */
91#define WAIT_ANY (-1) /* any process */
92#define WAIT_MYPGRP 0 /* any process in my process group */
93
94#include <machine/endian.h>
95
96/*
97 * Deprecated:
98 * Structure of the information in the status word returned by wait4.
99 * If w_stopval==WSTOPPED, then the second structure describes
100 * the information returned, else the first.
101 */
102union wait {
103 int w_status; /* used in syscall */
104 /*
105 * Terminated process status.
106 */
107 struct {
108#if BYTE_ORDER == LITTLE_ENDIAN
109 unsigned int w_Termsig:7, /* termination signal */
110 w_Coredump:1, /* core dump indicator */
111 w_Retcode:8, /* exit code if w_termsig==0 */
112 w_Filler:16; /* upper bits filler */
113#endif
114#if 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#endif
120 } w_T;
121 /*
122 * Stopped process status. Returned
123 * only for traced children unless requested
124 * with the WUNTRACED option bit.
125 */
126 struct {
127#if BYTE_ORDER == LITTLE_ENDIAN
128 unsigned int w_Stopval:8, /* == W_STOPPED if stopped */
129 w_Stopsig:8, /* signal that stopped us */
130 w_Filler:16; /* upper bits filler */
131#endif
132#if BYTE_ORDER == BIG_ENDIAN
133 unsigned int w_Filler:16, /* upper bits filler */
134 w_Stopsig:8, /* signal that stopped us */
135 w_Stopval:8; /* == W_STOPPED if stopped */
136#endif
137 } w_S;
138};
139#define w_termsig w_T.w_Termsig
140#define w_coredump w_T.w_Coredump
141#define w_retcode w_T.w_Retcode
142#define w_stopval w_S.w_Stopval
143#define w_stopsig w_S.w_Stopsig
144
145#define WSTOPPED _WSTOPPED
146#endif /* _POSIX_SOURCE */
147
148#ifndef _KERNEL
149#include <sys/types.h>
150#include <sys/cdefs.h>
151
152__BEGIN_DECLS
153struct rusage; /* forward declaration */
154
b153f746
RG
155pid_t wait (int *);
156pid_t waitpid (pid_t, int *, int);
984263bc 157#ifndef _POSIX_SOURCE
b153f746
RG
158pid_t wait3 (int *, int, struct rusage *);
159pid_t wait4 (pid_t, int *, int, struct rusage *);
984263bc
MD
160#endif
161__END_DECLS
162#endif
163
164#endif