1/* Copyright (C) 1991-2016 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
17
18/*
19 * POSIX Standard: 3.2.1 Wait for Process Termination <sys/wait.h>
20 */
21
22#ifndef _SYS_WAIT_H
23#define _SYS_WAIT_H 1
24
25#include <features.h>
26
27__BEGIN_DECLS
28
29#include <signal.h>
30
31/* These macros could also be defined in <stdlib.h>. */
32#if !defined _STDLIB_H || (!defined __USE_XOPEN && !defined __USE_XOPEN2K8)
33/* This will define the `W*' macros for the flag
34 bits to `waitpid', `wait3', and `wait4'. */
35# include <bits/waitflags.h>
36
37/* This will define all the `__W*' macros. */
38# include <bits/waitstatus.h>
39
40# define WEXITSTATUS(status) __WEXITSTATUS (status)
41# define WTERMSIG(status) __WTERMSIG (status)
42# define WSTOPSIG(status) __WSTOPSIG (status)
43# define WIFEXITED(status) __WIFEXITED (status)
44# define WIFSIGNALED(status) __WIFSIGNALED (status)
45# define WIFSTOPPED(status) __WIFSTOPPED (status)
46# ifdef __WIFCONTINUED
47# define WIFCONTINUED(status) __WIFCONTINUED (status)
48# endif
49#endif /* <stdlib.h> not included. */
50
51#ifdef __USE_MISC
52# define WCOREFLAG __WCOREFLAG
53# define WCOREDUMP(status) __WCOREDUMP (status)
54# define W_EXITCODE(ret, sig) __W_EXITCODE (ret, sig)
55# define W_STOPCODE(sig) __W_STOPCODE (sig)
56#endif
57
58/* Wait for a child to die. When one does, put its status in *STAT_LOC
59 and return its process ID. For errors, return (pid_t) -1.
60
61 This function is a cancellation point and therefore not marked with
62 __THROW. */
63extern __pid_t wait (int *__stat_loc);
64
65#ifdef __USE_MISC
66/* Special values for the PID argument to `waitpid' and `wait4'. */
67# define WAIT_ANY (-1) /* Any process. */
68# define WAIT_MYPGRP 0 /* Any process in my process group. */
69#endif
70
71/* Wait for a child matching PID to die.
72 If PID is greater than 0, match any process whose process ID is PID.
73 If PID is (pid_t) -1, match any process.
74 If PID is (pid_t) 0, match any process with the
75 same process group as the current process.
76 If PID is less than -1, match any process whose
77 process group is the absolute value of PID.
78 If the WNOHANG bit is set in OPTIONS, and that child
79 is not already dead, return (pid_t) 0. If successful,
80 return PID and store the dead child's status in STAT_LOC.
81 Return (pid_t) -1 for errors. If the WUNTRACED bit is
82 set in OPTIONS, return status for stopped children; otherwise don't.
83
84 This function is a cancellation point and therefore not marked with
85 __THROW. */
86extern __pid_t waitpid (__pid_t __pid, int *__stat_loc, int __options);
87
88#if defined __USE_XOPEN || defined __USE_XOPEN2K8
89# ifndef __id_t_defined
90# include <bits/types.h>
91typedef __id_t id_t;
92# define __id_t_defined
93# endif
94
95# define __need_siginfo_t
96# include <bits/siginfo.h>
97
98/* Wait for a childing matching IDTYPE and ID to change the status and
99 place appropriate information in *INFOP.
100 If IDTYPE is P_PID, match any process whose process ID is ID.
101 If IDTYPE is P_PGID, match any process whose process group is ID.
102 If IDTYPE is P_ALL, match any process.
103 If the WNOHANG bit is set in OPTIONS, and that child
104 is not already dead, clear *INFOP and return 0. If successful, store
105 exit code and status in *INFOP.
106
107 This function is a cancellation point and therefore not marked with
108 __THROW. */
109extern int waitid (idtype_t __idtype, __id_t __id, siginfo_t *__infop,
110 int __options);
111#endif
112
113#if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
114/* This being here makes the prototypes valid whether or not
115 we have already included <sys/resource.h> to define `struct rusage'. */
116struct rusage;
117
118/* Wait for a child to exit. When one does, put its status in *STAT_LOC and
119 return its process ID. For errors return (pid_t) -1. If USAGE is not
120 nil, store information about the child's resource usage there. If the
121 WUNTRACED bit is set in OPTIONS, return status for stopped children;
122 otherwise don't. */
123extern __pid_t wait3 (int *__stat_loc, int __options,
124 struct rusage * __usage) __THROWNL;
125#endif
126
127#ifdef __USE_MISC
128/* PID is like waitpid. Other args are like wait3. */
129extern __pid_t wait4 (__pid_t __pid, int *__stat_loc, int __options,
130 struct rusage *__usage) __THROWNL;
131#endif /* Use misc. */
132
133
134__END_DECLS
135
136#endif /* sys/wait.h */
137