FreeBSD/Linux Kernel Cross Reference
sys/sys/wait.h
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 * 4. 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 * $FreeBSD: releng/11.2/sys/sys/wait.h 331722 2018-03-29 02:50:57Z eadler $
31 */
32
33 #ifndef _SYS_WAIT_H_
34 #define _SYS_WAIT_H_
35
36 #include <sys/cdefs.h>
37
38 /*
39 * This file holds definitions relevant to the wait4 system call and the
40 * alternate interfaces that use it (wait, wait3, waitpid).
41 */
42
43 /*
44 * Macros to test the exit status returned by wait and extract the relevant
45 * values.
46 */
47 #if __BSD_VISIBLE
48 #define WCOREFLAG 0200
49 #endif
50 #define _W_INT(i) (i)
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 && (x) != 0x13)
57 #define WTERMSIG(x) (_WSTATUS(x))
58 #define WIFEXITED(x) (_WSTATUS(x) == 0)
59 #define WEXITSTATUS(x) (_W_INT(x) >> 8)
60 #define WIFCONTINUED(x) (x == 0x13) /* 0x13 == SIGCONT */
61 #if __BSD_VISIBLE
62 #define WCOREDUMP(x) (_W_INT(x) & WCOREFLAG)
63
64 #define W_EXITCODE(ret, sig) ((ret) << 8 | (sig))
65 #define W_STOPCODE(sig) ((sig) << 8 | _WSTOPPED)
66 #endif
67
68 /*
69 * Option bits for the third argument of wait4. WNOHANG causes the
70 * wait to not hang if there are no stopped or terminated processes, rather
71 * returning an error indication in this case (pid==0). WUNTRACED
72 * indicates that the caller should receive status about untraced children
73 * which stop due to signals. If children are stopped and a wait without
74 * this option is done, it is as though they were still running... nothing
75 * about them is returned. WNOWAIT only request information about zombie,
76 * leaving the proc around, available for later waits.
77 */
78 #define WNOHANG 1 /* Don't hang in wait. */
79 #define WUNTRACED 2 /* Tell about stopped, untraced children. */
80 #define WSTOPPED WUNTRACED /* SUS compatibility */
81 #define WCONTINUED 4 /* Report a job control continued process. */
82 #define WNOWAIT 8 /* Poll only. Don't delete the proc entry. */
83 #define WEXITED 16 /* Wait for exited processes. */
84 #define WTRAPPED 32 /* Wait for a process to hit a trap or
85 a breakpoint. */
86
87 #if __BSD_VISIBLE
88 #define WLINUXCLONE 0x80000000 /* Wait for kthread spawned from linux_clone. */
89 #endif
90
91 #ifndef _IDTYPE_T_DECLARED
92 typedef enum
93 #if __BSD_VISIBLE
94 idtype /* pollutes XPG4.2 namespace */
95 #endif
96 {
97 /*
98 * These names were mostly lifted from Solaris source code and
99 * still use Solaris style naming to avoid breaking any
100 * OpenSolaris code which has been ported to FreeBSD. There
101 * is no clear FreeBSD counterpart for all of the names, but
102 * some have a clear correspondence to FreeBSD entities.
103 *
104 * The numerical values are kept synchronized with the Solaris
105 * values.
106 */
107 P_PID, /* A process identifier. */
108 P_PPID, /* A parent process identifier. */
109 P_PGID, /* A process group identifier. */
110 P_SID, /* A session identifier. */
111 P_CID, /* A scheduling class identifier. */
112 P_UID, /* A user identifier. */
113 P_GID, /* A group identifier. */
114 P_ALL, /* All processes. */
115 P_LWPID, /* An LWP identifier. */
116 P_TASKID, /* A task identifier. */
117 P_PROJID, /* A project identifier. */
118 P_POOLID, /* A pool identifier. */
119 P_JAILID, /* A zone identifier. */
120 P_CTID, /* A (process) contract identifier. */
121 P_CPUID, /* CPU identifier. */
122 P_PSETID /* Processor set identifier. */
123 } idtype_t; /* The type of id_t we are using. */
124
125 #if __BSD_VISIBLE
126 #define P_ZONEID P_JAILID
127 #endif
128 #define _IDTYPE_T_DECLARED
129 #endif
130
131 /*
132 * Tokens for special values of the "pid" parameter to wait4.
133 * Extended struct __wrusage to collect rusage for both the target
134 * process and its children within one wait6() call.
135 */
136 #if __BSD_VISIBLE
137 #define WAIT_ANY (-1) /* any process */
138 #define WAIT_MYPGRP 0 /* any process in my process group */
139 #endif /* __BSD_VISIBLE */
140
141 #if defined(_KERNEL) || defined(_WANT_KW_EXITCODE)
142
143 /*
144 * Clamp the return code to the low 8 bits from full 32 bit value.
145 * Should be used in kernel to construct the wait(2)-compatible process
146 * status to usermode.
147 */
148 #define KW_EXITCODE(ret, sig) W_EXITCODE((ret) & 0xff, (sig))
149
150 #endif /* _KERNEL || _WANT_KW_EXITCODE */
151
152 #ifndef _KERNEL
153
154 #include <sys/types.h>
155
156 __BEGIN_DECLS
157 struct __siginfo;
158 pid_t wait(int *);
159 pid_t waitpid(pid_t, int *, int);
160 #if __POSIX_VISIBLE >= 200112
161 int waitid(idtype_t, id_t, struct __siginfo *, int);
162 #endif
163 #if __BSD_VISIBLE
164 struct rusage;
165 struct __wrusage;
166 pid_t wait3(int *, int, struct rusage *);
167 pid_t wait4(pid_t, int *, int, struct rusage *);
168 pid_t wait6(idtype_t, id_t, int *, int, struct __wrusage *,
169 struct __siginfo *);
170 #endif
171 __END_DECLS
172 #endif /* !_KERNEL */
173
174 #endif /* !_SYS_WAIT_H_ */
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