Annotation of prex-old/include/sys/wait.h, Revision 1.1.1.1
1.1 nbrk 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. 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: */
31:
32: /*
33: * This file holds definitions relevent to the wait4 system call
34: * and the alternate interfaces that use it (wait, wait3, waitpid).
35: */
36:
37: /*
38: * Macros to test the exit status returned by wait
39: * and extract the relevant values.
40: */
41: #ifdef _POSIX_SOURCE
42: #define _W_INT(i) (i)
43: #else
44: #define _W_INT(w) (*(int *)&(w)) /* convert union wait to int */
45: #define WCOREFLAG 0200
46: #endif
47:
48: #define _WSTATUS(x) (_W_INT(x) & 0177)
49: #define _WSTOPPED 0177 /* _WSTATUS if process is stopped */
50: #define WIFSTOPPED(x) (_WSTATUS(x) == _WSTOPPED)
51: #define WSTOPSIG(x) (_W_INT(x) >> 8)
52: #define WIFSIGNALED(x) (_WSTATUS(x) != _WSTOPPED && _WSTATUS(x) != 0)
53: #define WTERMSIG(x) (_WSTATUS(x))
54: #define WIFEXITED(x) (_WSTATUS(x) == 0)
55: #define WEXITSTATUS(x) (_W_INT(x) >> 8)
56: #ifndef _POSIX_SOURCE
57: #define WCOREDUMP(x) (_W_INT(x) & WCOREFLAG)
58:
59: #define W_EXITCODE(ret, sig) ((ret) << 8 | (sig))
60: #define W_STOPCODE(sig) ((sig) << 8 | _WSTOPPED)
61: #endif
62:
63: /*
64: * Option bits for the third argument of wait4. WNOHANG causes the
65: * wait to not hang if there are no stopped or terminated processes, rather
66: * returning an error indication in this case (pid==0). WUNTRACED
67: * indicates that the caller should receive status about untraced children
68: * which stop due to signals. If children are stopped and a wait without
69: * this option is done, it is as though they were still running... nothing
70: * about them is returned.
71: */
72: #define WNOHANG 1 /* don't hang in wait */
73: #define WUNTRACED 2 /* tell about stopped, untraced children */
74:
75: #ifndef _POSIX_SOURCE
76: /* POSIX extensions and 4.2/4.3 compatability: */
77:
78: /*
79: * Tokens for special values of the "pid" parameter to wait4.
80: */
81: #define WAIT_ANY (-1) /* any process */
82: #define WAIT_MYPGRP 0 /* any process in my process group */
83:
84: #include <sys/endian.h>
85:
86: /*
87: * Deprecated:
88: * Structure of the information in the status word returned by wait4.
89: * If w_stopval==WSTOPPED, then the second structure describes
90: * the information returned, else the first.
91: */
92: union wait {
93: int w_status; /* used in syscall */
94: /*
95: * Terminated process status.
96: */
97: struct {
98: #if BYTE_ORDER == LITTLE_ENDIAN
99: unsigned int w_Termsig:7, /* termination signal */
100: w_Coredump:1, /* core dump indicator */
101: w_Retcode:8, /* exit code if w_termsig==0 */
102: w_Filler:16; /* upper bits filler */
103: #endif
104: #if BYTE_ORDER == BIG_ENDIAN
105: unsigned int w_Filler:16, /* upper bits filler */
106: w_Retcode:8, /* exit code if w_termsig==0 */
107: w_Coredump:1, /* core dump indicator */
108: w_Termsig:7; /* termination signal */
109: #endif
110: } w_T;
111: /*
112: * Stopped process status. Returned
113: * only for traced children unless requested
114: * with the WUNTRACED option bit.
115: */
116: struct {
117: #if BYTE_ORDER == LITTLE_ENDIAN
118: unsigned int w_Stopval:8, /* == W_STOPPED if stopped */
119: w_Stopsig:8, /* signal that stopped us */
120: w_Filler:16; /* upper bits filler */
121: #endif
122: #if BYTE_ORDER == BIG_ENDIAN
123: unsigned int w_Filler:16, /* upper bits filler */
124: w_Stopsig:8, /* signal that stopped us */
125: w_Stopval:8; /* == W_STOPPED if stopped */
126: #endif
127: } w_S;
128: };
129: #define w_termsig w_T.w_Termsig
130: #define w_coredump w_T.w_Coredump
131: #define w_retcode w_T.w_Retcode
132: #define w_stopval w_S.w_Stopval
133: #define w_stopsig w_S.w_Stopsig
134:
135: #define WSTOPPED _WSTOPPED
136: #endif /* _POSIX_SOURCE */
137:
138: #ifndef KERNEL
139: #include <sys/types.h>
140: #include <sys/cdefs.h>
141:
142: __BEGIN_DECLS
143: struct rusage; /* forward declaration */
144:
145: pid_t wait(int *);
146: pid_t waitpid(pid_t, int *, int);
147:
148: __END_DECLS
149: #endif
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