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1.1 root 1: /*
2: * Copyright (c) 1982, 1986, 1989 The Regents of the University of California.
3: * 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 7.17 (Berkeley) 6/19/91
34: */
35:
36: /*
37: * This file holds definitions relevent to the wait4 system call
38: * and the alternate interfaces that use it (wait, wait3, waitpid).
39: */
40:
41: /*
42: * Macros to test the exit status returned by wait
43: * and extract the relevant values.
44: */
45: #ifdef _POSIX_SOURCE
46: #define _W_INT(i) (i)
47: #else
48: #define _W_INT(w) (*(int *)&(w)) /* convert union wait to int */
49: #define WCOREFLAG 0200
50: #endif
51:
52: #define _WSTATUS(x) (_W_INT(x) & 0177)
53: #define _WSTOPPED 0177 /* _WSTATUS if process is stopped */
54: #define WIFSTOPPED(x) (_WSTATUS(x) == _WSTOPPED)
55: #define WSTOPSIG(x) (_W_INT(x) >> 8)
56: #define WIFSIGNALED(x) (_WSTATUS(x) != _WSTOPPED && _WSTATUS(x) != 0)
57: #define WTERMSIG(x) (_WSTATUS(x))
58: #define WIFEXITED(x) (_WSTATUS(x) == 0)
59: #define WEXITSTATUS(x) (_W_INT(x) >> 8)
60: #ifndef _POSIX_SOURCE
61: #define WCOREDUMP(x) (_W_INT(x) & WCOREFLAG)
62:
63: #define W_EXITCODE(ret, sig) ((ret) << 8 | (sig))
64: #define W_STOPCODE(sig) ((sig) << 8 | _WSTOPPED)
65: #endif
66:
67: /*
68: * Option bits for the second argument of wait4. WNOHANG causes the
69: * wait to not hang if there are no stopped or terminated processes, rather
70: * returning an error indication in this case (pid==0). WUNTRACED
71: * indicates that the caller should receive status about untraced children
72: * which stop due to signals. If children are stopped and a wait without
73: * this option is done, it is as though they were still running... nothing
74: * about them is returned.
75: */
76: #define WNOHANG 1 /* dont hang in wait */
77: #define WUNTRACED 2 /* tell about stopped, untraced children */
78:
79: #ifndef _POSIX_SOURCE
80: /* POSIX extensions and 4.2/4.3 compatability: */
81:
82: /*
83: * Tokens for special values of the "pid" parameter to wait4.
84: */
85: #define WAIT_ANY (-1) /* any process */
86: #define WAIT_MYPGRP 0 /* any process in my process group */
87:
88: #ifndef BYTE_ORDER
89: #include <machine/endian.h>
90: #endif
91:
92: /*
93: * Deprecated:
94: * Structure of the information in the status word returned by wait4.
95: * If w_stopval==WSTOPPED, then the second structure describes
96: * the information returned, else the first.
97: */
98: union wait {
99: int w_status; /* used in syscall */
100: /*
101: * Terminated process status.
102: */
103: struct {
104: #if BYTE_ORDER == LITTLE_ENDIAN
105: unsigned int w_Termsig:7, /* termination signal */
106: w_Coredump:1, /* core dump indicator */
107: w_Retcode:8, /* exit code if w_termsig==0 */
108: w_Filler:16; /* upper bits filler */
109: #endif
110: #if BYTE_ORDER == BIG_ENDIAN
111: unsigned int w_Filler:16, /* upper bits filler */
112: w_Retcode:8, /* exit code if w_termsig==0 */
113: w_Coredump:1, /* core dump indicator */
114: w_Termsig:7; /* termination signal */
115: #endif
116: } w_T;
117: /*
118: * Stopped process status. Returned
119: * only for traced children unless requested
120: * with the WUNTRACED option bit.
121: */
122: struct {
123: #if BYTE_ORDER == LITTLE_ENDIAN
124: unsigned int w_Stopval:8, /* == W_STOPPED if stopped */
125: w_Stopsig:8, /* signal that stopped us */
126: w_Filler:16; /* upper bits filler */
127: #endif
128: #if BYTE_ORDER == BIG_ENDIAN
129: unsigned int w_Filler:16, /* upper bits filler */
130: w_Stopsig:8, /* signal that stopped us */
131: w_Stopval:8; /* == W_STOPPED if stopped */
132: #endif
133: } w_S;
134: };
135: #define w_termsig w_T.w_Termsig
136: #define w_coredump w_T.w_Coredump
137: #define w_retcode w_T.w_Retcode
138: #define w_stopval w_S.w_Stopval
139: #define w_stopsig w_S.w_Stopsig
140:
141: #define WSTOPPED _WSTOPPED
142: #endif /* _POSIX_SOURCE */
143:
144: #ifndef KERNEL
145: #include <sys/types.h>
146: #include <sys/cdefs.h>
147:
148: __BEGIN_DECLS
149: struct rusage; /* forward declaration */
150:
151: pid_t wait __P((int *));
152: pid_t waitpid __P((pid_t, int *, int));
153: #ifndef _POSIX_SOURCE
154: pid_t wait3 __P((int *, int, struct rusage *));
155: pid_t wait4 __P((pid_t, int *, int, struct rusage *));
156: #endif
157: __END_DECLS
158: #endif
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