1/* Copyright (C) 1991-2019 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 <bits/types.h>
30#ifndef __pid_t_defined
31typedef __pid_t pid_t;
32# define __pid_t_defined
33#endif
34
35#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
36# include <signal.h>
37#endif
38
39#if defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K8
40/* Some older standards require the contents of struct rusage to be
41 defined here. */
42# include <bits/types/struct_rusage.h>
43#endif
44
45/* These macros could also be defined in <stdlib.h>. */
46#if !defined _STDLIB_H || (!defined __USE_XOPEN && !defined __USE_XOPEN2K8)
47/* This will define the `W*' macros for the flag
48 bits to `waitpid', `wait3', and `wait4'. */
49# include <bits/waitflags.h>
50
51/* This will define all the `__W*' macros. */
52# include <bits/waitstatus.h>
53
54# define WEXITSTATUS(status) __WEXITSTATUS (status)
55# define WTERMSIG(status) __WTERMSIG (status)
56# define WSTOPSIG(status) __WSTOPSIG (status)
57# define WIFEXITED(status) __WIFEXITED (status)
58# define WIFSIGNALED(status) __WIFSIGNALED (status)
59# define WIFSTOPPED(status) __WIFSTOPPED (status)
60# ifdef __WIFCONTINUED
61# define WIFCONTINUED(status) __WIFCONTINUED (status)
62# endif
63#endif /* <stdlib.h> not included. */
64
65#ifdef __USE_MISC
66# define WCOREFLAG __WCOREFLAG
67# define WCOREDUMP(status) __WCOREDUMP (status)
68# define W_EXITCODE(ret, sig) __W_EXITCODE (ret, sig)
69# define W_STOPCODE(sig) __W_STOPCODE (sig)
70#endif
71
72/* Wait for a child to die. When one does, put its status in *STAT_LOC
73 and return its process ID. For errors, return (pid_t) -1.
74
75 This function is a cancellation point and therefore not marked with
76 __THROW. */
77extern __pid_t wait (int *__stat_loc);
78
79#ifdef __USE_MISC
80/* Special values for the PID argument to `waitpid' and `wait4'. */
81# define WAIT_ANY (-1) /* Any process. */
82# define WAIT_MYPGRP 0 /* Any process in my process group. */
83#endif
84
85/* Wait for a child matching PID to die.
86 If PID is greater than 0, match any process whose process ID is PID.
87 If PID is (pid_t) -1, match any process.
88 If PID is (pid_t) 0, match any process with the
89 same process group as the current process.
90 If PID is less than -1, match any process whose
91 process group is the absolute value of PID.
92 If the WNOHANG bit is set in OPTIONS, and that child
93 is not already dead, return (pid_t) 0. If successful,
94 return PID and store the dead child's status in STAT_LOC.
95 Return (pid_t) -1 for errors. If the WUNTRACED bit is
96 set in OPTIONS, return status for stopped children; otherwise don't.
97
98 This function is a cancellation point and therefore not marked with
99 __THROW. */
100extern __pid_t waitpid (__pid_t __pid, int *__stat_loc, int __options);
101
102#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
103# ifndef __id_t_defined
104typedef __id_t id_t;
105# define __id_t_defined
106# endif
107
108# include <bits/types/siginfo_t.h>
109
110/* Wait for a childing matching IDTYPE and ID to change the status and
111 place appropriate information in *INFOP.
112 If IDTYPE is P_PID, match any process whose process ID is ID.
113 If IDTYPE is P_PGID, match any process whose process group is ID.
114 If IDTYPE is P_ALL, match any process.
115 If the WNOHANG bit is set in OPTIONS, and that child
116 is not already dead, clear *INFOP and return 0. If successful, store
117 exit code and status in *INFOP.
118
119 This function is a cancellation point and therefore not marked with
120 __THROW. */
121extern int waitid (idtype_t __idtype, __id_t __id, siginfo_t *__infop,
122 int __options);
123#endif
124
125#if defined __USE_MISC \
126 || (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K)
127/* This being here makes the prototypes valid whether or not
128 we have already included <sys/resource.h> to define `struct rusage'. */
129struct rusage;
130
131/* Wait for a child to exit. When one does, put its status in *STAT_LOC and
132 return its process ID. For errors return (pid_t) -1. If USAGE is not
133 nil, store information about the child's resource usage there. If the
134 WUNTRACED bit is set in OPTIONS, return status for stopped children;
135 otherwise don't. */
136extern __pid_t wait3 (int *__stat_loc, int __options,
137 struct rusage * __usage) __THROWNL;
138#endif
139
140#ifdef __USE_MISC
141/* PID is like waitpid. Other args are like wait3. */
142extern __pid_t wait4 (__pid_t __pid, int *__stat_loc, int __options,
143 struct rusage *__usage) __THROWNL;
144#endif /* Use misc. */
145
146
147__END_DECLS
148
149#endif /* sys/wait.h */
150