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- /* Copyright (C) 1991, 1992 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 Library General Public License as
- published by the Free Software Foundation; either version 2 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
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If
- not, write to the, 1992 Free Software Foundation, Inc., 675 Mass Ave,
- Cambridge, MA 02139, 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 <gnu/types.h>
-
- /* This will define the `W*' macros for the flag
- bits to `waitpid', `wait3', and `wait4'. */
- #include <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. */
-
- #ifdef __GNUC__
- #define __WAIT_INT(status) \
- (__extension__ ({ union { __typeof(status) __in; int __i; } __u; \
- __u.__in = (status); __u.__i; }))
- #else
- #define __WAIT_INT(status) (*(int *) &(status))
- #endif
-
- /* This is the type of the argument to `wait'.
- With GCC 2, the funky union causes redeclarations with either `int *' or
- `union wait *' to be allowed. */
-
- #if !defined (__GNUC__) || __GNUC__ < 2 || 1 /* GCC broken as of 2.3.1 */
- #define __WAIT_STATUS __ptr_t
- #else
- #define __WAIT_STATUS union { union wait *__unionptr; int *__intptr; }
- #endif
-
- #else /* Don't use BSD. */
-
- #define __WAIT_INT(status) (status)
- #define __WAIT_STATUS int *
-
- #endif /* Use BSD. */
-
- /* This will define all the `__W*' macros. */
- #include <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 __USE_BSD
- #define WCOREDUMP(status) __WCOREDUMP(__WAIT_INT(status))
- #define W_EXITCODE(ret, sig) __W_EXITCODE(ret, sig)
- #define W_STOPCODE(sig) __W_STOPCODE(sig)
- #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. */
- extern __pid_t __wait __P ((__WAIT_STATUS __stat_loc));
- extern __pid_t wait __P ((__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. */
- extern __pid_t __waitpid __P ((__pid_t __pid, int *__stat_loc,
- int __options));
- extern __pid_t waitpid __P ((__pid_t __pid, int *__stat_loc,
- int __options));
- #ifdef __USE_BSD
- /* 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 __P ((__WAIT_STATUS __stat_loc,
- int __options, struct rusage * __usage));
- extern __pid_t wait3 __P ((__WAIT_STATUS __stat_loc,
- int __options, struct rusage * __usage));
-
- /* PID is like waitpid. Other args are like wait3. */
- extern __pid_t __wait4 __P ((__pid_t __pid, __WAIT_STATUS __stat_loc,
- int __options, struct rusage *__usage));
- extern __pid_t wait4 __P ((__pid_t __pid, __WAIT_STATUS __stat_loc,
- int __options, struct rusage *__usage));
- #endif /* Use BSD. */
-
-
- __END_DECLS
-
- #endif /* sys/wait.h */
-