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/* Definitions of status bits for `wait' et al.
Copyright (C) 1992, 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 Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
/* Everything extant so far uses these same bits. */
#ifndef _WAITSTATUS_H
#define _WAITSTATUS_H
/* If WIFEXITED(STATUS), the low-order 8 bits of the status. */
#define __WEXITSTATUS(status) (((status) & 0xff00) >> 8)
/* If WIFSIGNALED(STATUS), the terminating signal. */
#define __WTERMSIG(status) ((status) & 0x7f)
/* If WIFSTOPPED(STATUS), the signal that stopped the child. */
#define __WSTOPSIG(status) __WEXITSTATUS(status)
/* Nonzero if STATUS indicates normal termination. */
#define __WIFEXITED(status) (__WTERMSIG(status) == 0)
/* Nonzero if STATUS indicates termination by a signal. */
#ifdef __GNUC__
#define __WIFSIGNALED(status) \
(__extension__ ({ int __stat = (status); \
!__WIFSTOPPED(__stat) && !__WIFEXITED(__stat); }))
#else /* Not GCC. */
#define __WIFSIGNALED(status) (!__WIFSTOPPED(status) && !__WIFEXITED(status))
#endif /* GCC. */
/* Nonzero if STATUS indicates the child is stopped. */
#define __WIFSTOPPED(status) (((status) & 0xff) == 0x7f)
/* Nonzero if STATUS indicates the child dumped core. */
#define __WCOREDUMP(status) ((status) & __WCOREFLAG)
/* Macros for constructing status values. */
#define __W_EXITCODE(ret, sig) ((ret) << 8 | (sig))
#define __W_STOPCODE(sig) ((sig) << 8 | 0x7f)
#define __WCOREFLAG 0x80
#ifdef __USE_BSD
#include <endian.h>
union wait
{
struct
{
#if __BYTE_ORDER == __LITTLE_ENDIAN
unsigned int __w_termsig:7; /* Terminating signal. */
unsigned int __w_coredump:1; /* Set if dumped core. */
unsigned int __w_retcode:8; /* Return code if exited normally. */
unsigned int:16;
#endif /* Little endian. */
#if __BYTE_ORDER == __BIG_ENDIAN
unsigned int:16;
unsigned int __w_retcode:8;
unsigned int __w_coredump:1;
unsigned int __w_termsig:7;
#endif /* Big endian. */
} __wait_terminated;
struct
{
#if __BYTE_ORDER == __LITTLE_ENDIAN
unsigned int __w_stopval:8; /* W_STOPPED if stopped. */
unsigned int __w_stopsig:8; /* Stopping signal. */
unsigned int:16;
#endif /* Little endian. */
#if __BYTE_ORDER == __BIG_ENDIAN
unsigned int:16;
unsigned int __w_stopsig:8; /* Stopping signal. */
unsigned int __w_stopval:8; /* W_STOPPED if stopped. */
#endif /* Big endian. */
} __wait_stopped;
};
#define w_termsig __wait_terminated.__w_termsig
#define w_coredump __wait_terminated.__w_coredump
#define w_retcode __wait_terminated.__w_retcode
#define w_stopsig __wait_stopped.__w_stopsig
#define w_stopval __wait_stopped.__w_stopval
#endif /* Use BSD. */
#endif /* waitstatus.h */
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