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/* Copyright (C) 1991, 92, 93, 94, 96 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 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'.
NOTE: Since this functionality is volatile, I'm disabling the use of it for
now.
With GCC 2.6.1 and later, 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 || \
/*(__GNUC__ == 2 && __GNUC_MINOR__ < 6)*/ 1)
#define __WAIT_STATUS __ptr_t
#define __WAIT_STATUS_DEFN __ptr_t
#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 <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 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
/* 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 */
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