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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: *
1.1.1.2 ! root 33: * from: @(#)wait.h 7.17 (Berkeley) 6/19/91
! 34: * wait.h,v 1.3 1993/05/20 16:23:59 cgd Exp
1.1 root 35: */
36:
1.1.1.2 ! root 37: #ifndef _SYS_WAIT_H_
! 38: #define _SYS_WAIT_H_
! 39:
1.1 root 40: /*
41: * This file holds definitions relevent to the wait4 system call
42: * and the alternate interfaces that use it (wait, wait3, waitpid).
43: */
44:
45: /*
46: * Macros to test the exit status returned by wait
47: * and extract the relevant values.
48: */
49: #ifdef _POSIX_SOURCE
50: #define _W_INT(i) (i)
51: #else
52: #define _W_INT(w) (*(int *)&(w)) /* convert union wait to int */
53: #define WCOREFLAG 0200
54: #endif
55:
56: #define _WSTATUS(x) (_W_INT(x) & 0177)
57: #define _WSTOPPED 0177 /* _WSTATUS if process is stopped */
58: #define WIFSTOPPED(x) (_WSTATUS(x) == _WSTOPPED)
59: #define WSTOPSIG(x) (_W_INT(x) >> 8)
60: #define WIFSIGNALED(x) (_WSTATUS(x) != _WSTOPPED && _WSTATUS(x) != 0)
61: #define WTERMSIG(x) (_WSTATUS(x))
62: #define WIFEXITED(x) (_WSTATUS(x) == 0)
63: #define WEXITSTATUS(x) (_W_INT(x) >> 8)
64: #ifndef _POSIX_SOURCE
65: #define WCOREDUMP(x) (_W_INT(x) & WCOREFLAG)
66:
67: #define W_EXITCODE(ret, sig) ((ret) << 8 | (sig))
68: #define W_STOPCODE(sig) ((sig) << 8 | _WSTOPPED)
69: #endif
70:
71: /*
72: * Option bits for the second argument of wait4. WNOHANG causes the
73: * wait to not hang if there are no stopped or terminated processes, rather
74: * returning an error indication in this case (pid==0). WUNTRACED
75: * indicates that the caller should receive status about untraced children
76: * which stop due to signals. If children are stopped and a wait without
77: * this option is done, it is as though they were still running... nothing
78: * about them is returned.
79: */
80: #define WNOHANG 1 /* dont hang in wait */
81: #define WUNTRACED 2 /* tell about stopped, untraced children */
82:
83: #ifndef _POSIX_SOURCE
84: /* POSIX extensions and 4.2/4.3 compatability: */
85:
86: /*
87: * Tokens for special values of the "pid" parameter to wait4.
88: */
89: #define WAIT_ANY (-1) /* any process */
90: #define WAIT_MYPGRP 0 /* any process in my process group */
91:
92: #ifndef BYTE_ORDER
93: #include <machine/endian.h>
94: #endif
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: */
102: union 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
153: struct rusage; /* forward declaration */
154:
155: pid_t wait __P((int *));
156: pid_t waitpid __P((pid_t, int *, int));
157: #ifndef _POSIX_SOURCE
158: pid_t wait3 __P((int *, int, struct rusage *));
159: pid_t wait4 __P((pid_t, int *, int, struct rusage *));
160: #endif
161: __END_DECLS
162: #endif
1.1.1.2 ! root 163:
! 164: #endif /* !_SYS_WAIT_H_ */
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