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1.1 root 1: /*
2: * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
7: * Reserved. This file contains Original Code and/or Modifications of
8: * Original Code as defined in and that are subject to the Apple Public
9: * Source License Version 1.1 (the "License"). You may not use this file
10: * except in compliance with the License. Please obtain a copy of the
11: * License at http://www.apple.com/publicsource and read it before using
12: * this file.
13: *
14: * The Original Code and all software distributed under the License are
15: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
16: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
17: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
18: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
19: * License for the specific language governing rights and limitations
20: * under the License.
21: *
22: * @APPLE_LICENSE_HEADER_END@
23: */
24:
25: /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
26: /*
27: * Copyright (c) 1982, 1986, 1989, 1993, 1994
28: * The Regents of the University of California. All rights reserved.
29: *
30: * Redistribution and use in source and binary forms, with or without
31: * modification, are permitted provided that the following conditions
32: * are met:
33: * 1. Redistributions of source code must retain the above copyright
34: * notice, this list of conditions and the following disclaimer.
35: * 2. Redistributions in binary form must reproduce the above copyright
36: * notice, this list of conditions and the following disclaimer in the
37: * documentation and/or other materials provided with the distribution.
38: * 3. All advertising materials mentioning features or use of this software
39: * must display the following acknowledgement:
40: * This product includes software developed by the University of
41: * California, Berkeley and its contributors.
42: * 4. Neither the name of the University nor the names of its contributors
43: * may be used to endorse or promote products derived from this software
44: * without specific prior written permission.
45: *
46: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
47: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
48: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
49: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
50: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
51: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
52: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
53: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
54: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
55: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
56: * SUCH DAMAGE.
57: *
58: * @(#)wait.h 8.2 (Berkeley) 7/10/94
59: */
60:
61: #ifndef _SYS_WAIT_H_
62: #define _SYS_WAIT_H_
63:
64: /*
65: * This file holds definitions relevent to the wait4 system call
66: * and the alternate interfaces that use it (wait, wait3, waitpid).
67: */
68:
69: /*
70: * Macros to test the exit status returned by wait
71: * and extract the relevant values.
72: */
73: #ifdef _POSIX_SOURCE
74: #define _W_INT(i) (i)
75: #else
76: #define _W_INT(w) (*(int *)&(w)) /* convert union wait to int */
77: #define WCOREFLAG 0200
78:
79: #endif /* _POSIX_SOURCE */
80:
81: #define _WSTATUS(x) (_W_INT(x) & 0177)
82: #define _WSTOPPED 0177 /* _WSTATUS if process is stopped */
83: #define WIFSTOPPED(x) (_WSTATUS(x) == _WSTOPPED)
84: #define WSTOPSIG(x) (_W_INT(x) >> 8)
85: #define WIFSIGNALED(x) (_WSTATUS(x) != _WSTOPPED && _WSTATUS(x) != 0)
86: #define WTERMSIG(x) (_WSTATUS(x))
87: #define WIFEXITED(x) (_WSTATUS(x) == 0)
88: #define WEXITSTATUS(x) (_W_INT(x) >> 8)
89: #if !defined(_POSIX_SOURCE)
90: #define WCOREDUMP(x) (_W_INT(x) & WCOREFLAG)
91:
92: #define W_EXITCODE(ret, sig) ((ret) << 8 | (sig))
93: #define W_STOPCODE(sig) ((sig) << 8 | _WSTOPPED)
94: #endif /* !defined(_POSIX_SOURCE) */
95:
96: /*
97: * Option bits for the third argument of wait4. WNOHANG causes the
98: * wait to not hang if there are no stopped or terminated processes, rather
99: * returning an error indication in this case (pid==0). WUNTRACED
100: * indicates that the caller should receive status about untraced children
101: * which stop due to signals. If children are stopped and a wait without
102: * this option is done, it is as though they were still running... nothing
103: * about them is returned.
104: */
105: #define WNOHANG 1 /* don't hang in wait */
106: #define WUNTRACED 2 /* tell about stopped, untraced children */
107:
108: #if !defined(_POSIX_SOURCE)
109: /* POSIX extensions and 4.2/4.3 compatability: */
110:
111: /*
112: * Tokens for special values of the "pid" parameter to wait4.
113: */
114: #define WAIT_ANY (-1) /* any process */
115: #define WAIT_MYPGRP 0 /* any process in my process group */
116:
117: #include <machine/endian.h>
118:
119: /*
120: * Deprecated:
121: * Structure of the information in the status word returned by wait4.
122: * If w_stopval==WSTOPPED, then the second structure describes
123: * the information returned, else the first.
124: */
125: union wait {
126: int w_status; /* used in syscall */
127: /*
128: * Terminated process status.
129: */
130: struct {
131: #if BYTE_ORDER == LITTLE_ENDIAN
132: unsigned int w_Termsig:7, /* termination signal */
133: w_Coredump:1, /* core dump indicator */
134: w_Retcode:8, /* exit code if w_termsig==0 */
135: w_Filler:16; /* upper bits filler */
136: #endif
137: #if BYTE_ORDER == BIG_ENDIAN
138: unsigned int w_Filler:16, /* upper bits filler */
139: w_Retcode:8, /* exit code if w_termsig==0 */
140: w_Coredump:1, /* core dump indicator */
141: w_Termsig:7; /* termination signal */
142: #endif
143: } w_T;
144: /*
145: * Stopped process status. Returned
146: * only for traced children unless requested
147: * with the WUNTRACED option bit.
148: */
149: struct {
150: #if BYTE_ORDER == LITTLE_ENDIAN
151: unsigned int w_Stopval:8, /* == W_STOPPED if stopped */
152: w_Stopsig:8, /* signal that stopped us */
153: w_Filler:16; /* upper bits filler */
154: #endif
155: #if BYTE_ORDER == BIG_ENDIAN
156: unsigned int w_Filler:16, /* upper bits filler */
157: w_Stopsig:8, /* signal that stopped us */
158: w_Stopval:8; /* == W_STOPPED if stopped */
159: #endif
160: } w_S;
161: };
162: #define w_termsig w_T.w_Termsig
163: #define w_coredump w_T.w_Coredump
164: #define w_retcode w_T.w_Retcode
165: #define w_stopval w_S.w_Stopval
166: #define w_stopsig w_S.w_Stopsig
167:
168: #define WSTOPPED _WSTOPPED
169: #endif /* !defined(_POSIX_SOURCE) */
170:
171: #ifndef _KERNEL
172: #include <sys/types.h>
173: #include <sys/cdefs.h>
174:
175: __BEGIN_DECLS
176: struct rusage; /* forward declaration */
177:
178: pid_t wait __P((int *));
179: pid_t waitpid __P((pid_t, int *, int));
180: #if !defined(_POSIX_SOURCE)
181: pid_t wait3 __P((int *, int, struct rusage *));
182: pid_t wait4 __P((pid_t, int *, int, struct rusage *));
183: #endif /* !defined(_POSIX_SOURCE) */
184: __END_DECLS
185: #endif
186: #endif /* !_SYS_WAIT_H_ */
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