1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
/* Copyright (C) 1991-1994,1996-2001,2003,2004,2005,2007,2009,2010,2011,2012
Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
/*
* POSIX Standard: 3.2.1 Wait for Process Termination <sys/wait.h>
*/
#ifndef _SYS_WAIT_H
#define _SYS_WAIT_H 1
#include <features.h>
__BEGIN_DECLS
#include <signal.h>
#include <sys/resource.h>
/* These macros could also be defined in <stdlib.h>. */
#if !defined _STDLIB_H || (!defined __USE_XOPEN && !defined __USE_XOPEN2K8)
/* This will define the `W*' macros for the flag
bits to `waitpid', `wait3', and `wait4'. */
# include <bits/waitflags.h>
# ifdef __USE_BSD
/* Lots of hair to allow traditional BSD use of `union wait'
as well as POSIX.1 use of `int' for the status word. */
# if defined __GNUC__ && !defined __cplusplus
# define __WAIT_INT(status) \
(__extension__ (((union { __typeof(status) __in; int __i; }) \
{ .__in = (status) }).__i))
# else
# define __WAIT_INT(status) (*(const int *) &(status))
# endif
/* This is the type of the argument to `wait'. The funky union
causes redeclarations with either `int *' or `union wait *' to be
allowed without complaint. __WAIT_STATUS_DEFN is the type used in
the actual function definitions. */
# if !defined __GNUC__ || __GNUC__ < 2 || defined __cplusplus
# define __WAIT_STATUS void *
# define __WAIT_STATUS_DEFN void *
# else
/* This works in GCC 2.6.1 and later. */
typedef union
{
union wait *__uptr;
int *__iptr;
} __WAIT_STATUS __attribute__ ((__transparent_union__));
# define __WAIT_STATUS_DEFN int *
# endif
# else /* Don't use BSD. */
# define __WAIT_INT(status) (status)
# define __WAIT_STATUS int *
# define __WAIT_STATUS_DEFN int *
# endif /* Use BSD. */
/* This will define all the `__W*' macros. */
# include <bits/waitstatus.h>
# define WEXITSTATUS(status) __WEXITSTATUS (__WAIT_INT (status))
# define WTERMSIG(status) __WTERMSIG (__WAIT_INT (status))
# define WSTOPSIG(status) __WSTOPSIG (__WAIT_INT (status))
# define WIFEXITED(status) __WIFEXITED (__WAIT_INT (status))
# define WIFSIGNALED(status) __WIFSIGNALED (__WAIT_INT (status))
# define WIFSTOPPED(status) __WIFSTOPPED (__WAIT_INT (status))
# ifdef __WIFCONTINUED
# define WIFCONTINUED(status) __WIFCONTINUED (__WAIT_INT (status))
# endif
#endif /* <stdlib.h> not included. */
#ifdef __USE_BSD
# define WCOREFLAG __WCOREFLAG
# define WCOREDUMP(status) __WCOREDUMP (__WAIT_INT (status))
# define W_EXITCODE(ret, sig) __W_EXITCODE (ret, sig)
# define W_STOPCODE(sig) __W_STOPCODE (sig)
#endif
/* The following values are used by the `waitid' function. */
#if defined __USE_SVID || defined __USE_XOPEN || defined __USE_XOPEN2K8
typedef enum
{
P_ALL, /* Wait for any child. */
P_PID, /* Wait for specified process. */
P_PGID /* Wait for members of process group. */
} idtype_t;
#endif
/* Wait for a child to die. When one does, put its status in *STAT_LOC
and return its process ID. For errors, return (pid_t) -1.
This function is a cancellation point and therefore not marked with
__THROW. */
extern __pid_t wait (__WAIT_STATUS __stat_loc);
#ifdef __USE_BSD
/* Special values for the PID argument to `waitpid' and `wait4'. */
# define WAIT_ANY (-1) /* Any process. */
# define WAIT_MYPGRP 0 /* Any process in my process group. */
#endif
/* Wait for a child matching PID to die.
If PID is greater than 0, match any process whose process ID is PID.
If PID is (pid_t) -1, match any process.
If PID is (pid_t) 0, match any process with the
same process group as the current process.
If PID is less than -1, match any process whose
process group is the absolute value of PID.
If the WNOHANG bit is set in OPTIONS, and that child
is not already dead, return (pid_t) 0. If successful,
return PID and store the dead child's status in STAT_LOC.
Return (pid_t) -1 for errors. If the WUNTRACED bit is
set in OPTIONS, return status for stopped children; otherwise don't.
This function is a cancellation point and therefore not marked with
__THROW. */
extern __pid_t waitpid (__pid_t __pid, int *__stat_loc, int __options);
#if defined __USE_SVID || defined __USE_XOPEN || defined __USE_XOPEN2K8
# define __need_siginfo_t
# include <bits/siginfo.h>
/* Wait for a childing matching IDTYPE and ID to change the status and
place appropriate information in *INFOP.
If IDTYPE is P_PID, match any process whose process ID is ID.
If IDTYPE is P_PGID, match any process whose process group is ID.
If IDTYPE is P_ALL, match any process.
If the WNOHANG bit is set in OPTIONS, and that child
is not already dead, clear *INFOP and return 0. If successful, store
exit code and status in *INFOP.
This function is a cancellation point and therefore not marked with
__THROW. */
extern int waitid (idtype_t __idtype, __id_t __id, siginfo_t *__infop,
int __options);
#endif
#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
/* This being here makes the prototypes valid whether or not
we have already included <sys/resource.h> to define `struct rusage'. */
struct rusage;
/* Wait for a child to exit. When one does, put its status in *STAT_LOC and
return its process ID. For errors return (pid_t) -1. If USAGE is not
nil, store information about the child's resource usage there. If the
WUNTRACED bit is set in OPTIONS, return status for stopped children;
otherwise don't. */
extern __pid_t wait3 (__WAIT_STATUS __stat_loc, int __options,
struct rusage * __usage) __THROWNL;
#endif
#ifdef __USE_BSD
/* PID is like waitpid. Other args are like wait3. */
extern __pid_t wait4 (__pid_t __pid, __WAIT_STATUS __stat_loc, int __options,
struct rusage *__usage) __THROWNL;
#endif /* Use BSD. */
__END_DECLS
#endif /* sys/wait.h */
|
