149 lines
4.7 KiB
C
149 lines
4.7 KiB
C
/* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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/*
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* POSIX Standard: 3.2.1 Wait for Process Termination <sys/wait.h>
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*/
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#ifndef _SYS_WAIT_H
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#define _SYS_WAIT_H 1
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#include <features.h>
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#include <gnu/types.h>
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#include <gnu/wait.h>
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#define WNOHANG __WNOHANG
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#define WUNTRACED __WUNTRACED
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/* Encoding of the status word. */
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#include <endian.h>
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#ifdef __USE_BSD
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union __wait
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{
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#ifdef __LITTLE_ENDIAN
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struct
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{
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unsigned int __w_termsig:7;
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unsigned int __w_coredump:1;
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unsigned int __w_retcode:8;
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unsigned int :16;
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} __wait_status;
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#else /* Big endian. */
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struct
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{
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unsigned int :16;
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unsigned int __w_retcode:8;
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unsigned int __w_coredump:1;
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unsigned int __w_termsig:7;
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} __wait_status;
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#endif /* Little endian. */
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};
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#define w_termsig __wait_status.__w_termsig
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#define w_coredump __wait_status.__w_coredump
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#define w_retcode __wait_status.__w_retcode
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#define w_stopsig w_retcode
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#ifdef __GNUC__
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#define __WAIT_INT(status) \
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(__extension__ ({ union { __typeof(status) __in; int __i; } __u; \
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__u.__in = (status); __u.__i; }))
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#else
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#define __WAIT_INT(status) (*(int *) &(status))
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#endif
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/* This is the type of the argument to `wait'.
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With GCC v2, this will be a strange union. */
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/* IGNORE(@This line MUST be split! m4 will not change it otherwise.@) */
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#define __WAIT_STATUS \
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PTR
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#else /* Don't use BSD. */
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#define __WAIT_INT(status) (status)
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#define __WAIT_STATUS int *
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#endif /* Use BSD. */
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#define WEXITSTATUS(status) __WEXITSTATUS(__WAIT_INT(status))
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#define WTERMSIG(status) __WTERMSIG(__WAIT_INT(status))
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#define WSTOPSIG(status) __WSTOPSIG(__WAIT_INT(status))
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#define WIFEXITED(status) __WIFEXITED(__WAIT_INT(status))
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#define WIFSIGNALED(status) __WIFSIGNALED(__WAIT_INT(status))
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#define WIFSTOPPED(status) __WIFSTOPPED(__WAIT_INT(status))
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#ifdef __USE_BSD
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#define WCOREDUMP(status) __WCOREDUMP(__WAIT_INT(status))
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#define W_EXITCODE(ret, sig) __W_EXITCODE(ret, sig)
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#define W_STOPCODE(sig) __W_STOPCODE(sig)
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#endif
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/* Wait for a child to die. When one does, put its status in *STAT_LOC
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and return its process ID. For errors, return (pid_t) -1. */
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extern __pid_t EXFUN(__wait, (__WAIT_STATUS __stat_loc));
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extern __pid_t EXFUN(wait, (__WAIT_STATUS __stat_loc));
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#ifdef __USE_BSD
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/* Special values for the PID argument to `waitpid' and `wait4'. */
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#define WAIT_ANY (-1) /* Any process. */
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#define WAIT_MYPGRP 0 /* Any process in my process group. */
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#endif
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/* Wait for a child matching PID to die.
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If PID is greater than 0, match any process whose process ID is PID.
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If PID is (pid_t) -1, match any process.
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If PID is (pid_t) 0, match any process with the
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same process group as the current process.
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If PID is less than -1, match any process whose
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process group is the absolute value of PID.
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If the WNOHANG bit is set in OPTIONS, and that child
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is not already dead, return (pid_t) 0. If successful,
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return PID and store the dead child's status in STAT_LOC.
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Return (pid_t) -1 for errors. If the WUNTRACED bit is
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set in OPTIONS, return status for stopped children; otherwise don't. */
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extern __pid_t EXFUN(__waitpid, (__pid_t __pid, int *__stat_loc,
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int __options));
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#ifdef __USE_BSD
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/* Wait for a child to exit. When one does, put its status in *STAT_LOC and
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return its process ID. For errors return (pid_t) -1. If USAGE is not nil,
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store information about the child's resource usage (as a `struct rusage')
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there. If the WUNTRACED bit is set in OPTIONS, return status for stopped
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children; otherwise don't. */
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extern __pid_t EXFUN(__wait3, (union __wait *__stat_loc,
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int __options, PTR __usage));
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#define wait3 __wait3
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/* PID is like waitpid. Other args are like wait3. */
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extern __pid_t EXFUN(__wait4, (__pid_t __pid, union __wait *__stat_loc,
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int __options, PTR __usage));
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#define wait4 __wait4
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#endif /* Use BSD. */
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#define waitpid __waitpid
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#define wait __wait
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#endif /* sys/wait.h */
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