1 /* Copyright (C) 1991-2017 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
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/>. */
19 * POSIX Standard: 3.2.1 Wait for Process Termination <sys/wait.h>
29 #include <bits/types.h>
30 #ifndef __pid_t_defined
31 typedef __pid_t pid_t
;
32 # define __pid_t_defined
35 #if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
39 #if defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K8
40 /* Some older standards require the contents of struct rusage to be
42 # include <bits/types/struct_rusage.h>
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>
51 /* This will define all the `__W*' macros. */
52 # include <bits/waitstatus.h>
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)
63 #endif /* <stdlib.h> not included. */
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)
72 /* The following values are used by the `waitid' function. */
73 #if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
76 P_ALL
, /* Wait for any child. */
77 P_PID
, /* Wait for specified process. */
78 P_PGID
/* Wait for members of process group. */
83 /* Wait for a child to die. When one does, put its status in *STAT_LOC
84 and return its process ID. For errors, return (pid_t) -1.
86 This function is a cancellation point and therefore not marked with
88 extern __pid_t
wait (int *__stat_loc
);
91 /* Special values for the PID argument to `waitpid' and `wait4'. */
92 # define WAIT_ANY (-1) /* Any process. */
93 # define WAIT_MYPGRP 0 /* Any process in my process group. */
96 /* Wait for a child matching PID to die.
97 If PID is greater than 0, match any process whose process ID is PID.
98 If PID is (pid_t) -1, match any process.
99 If PID is (pid_t) 0, match any process with the
100 same process group as the current process.
101 If PID is less than -1, match any process whose
102 process group is the absolute value of PID.
103 If the WNOHANG bit is set in OPTIONS, and that child
104 is not already dead, return (pid_t) 0. If successful,
105 return PID and store the dead child's status in STAT_LOC.
106 Return (pid_t) -1 for errors. If the WUNTRACED bit is
107 set in OPTIONS, return status for stopped children; otherwise don't.
109 This function is a cancellation point and therefore not marked with
111 extern __pid_t
waitpid (__pid_t __pid
, int *__stat_loc
, int __options
);
113 #if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
114 # ifndef __id_t_defined
116 # define __id_t_defined
119 # include <bits/types/siginfo_t.h>
121 /* Wait for a childing matching IDTYPE and ID to change the status and
122 place appropriate information in *INFOP.
123 If IDTYPE is P_PID, match any process whose process ID is ID.
124 If IDTYPE is P_PGID, match any process whose process group is ID.
125 If IDTYPE is P_ALL, match any process.
126 If the WNOHANG bit is set in OPTIONS, and that child
127 is not already dead, clear *INFOP and return 0. If successful, store
128 exit code and status in *INFOP.
130 This function is a cancellation point and therefore not marked with
132 extern int waitid (idtype_t __idtype
, __id_t __id
, siginfo_t
*__infop
,
136 #if defined __USE_MISC \
137 || (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K)
138 /* This being here makes the prototypes valid whether or not
139 we have already included <sys/resource.h> to define `struct rusage'. */
142 /* Wait for a child to exit. When one does, put its status in *STAT_LOC and
143 return its process ID. For errors return (pid_t) -1. If USAGE is not
144 nil, store information about the child's resource usage there. If the
145 WUNTRACED bit is set in OPTIONS, return status for stopped children;
147 extern __pid_t
wait3 (int *__stat_loc
, int __options
,
148 struct rusage
* __usage
) __THROWNL
;
152 /* PID is like waitpid. Other args are like wait3. */
153 extern __pid_t
wait4 (__pid_t __pid
, int *__stat_loc
, int __options
,
154 struct rusage
*__usage
) __THROWNL
;
155 #endif /* Use misc. */
160 #endif /* sys/wait.h */