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Diffstat (limited to 'posix/sys/wait.h')
| -rw-r--r-- | posix/sys/wait.h | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/posix/sys/wait.h b/posix/sys/wait.h new file mode 100644 index 0000000000..b7800d7090 --- /dev/null +++ b/posix/sys/wait.h @@ -0,0 +1,151 @@ +/* Copyright (C) 1991, 1992, 1993, 1994 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'. + + 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 */ |