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/* unionwait.h -- definitions for using a `union wait' on systems without
one. */
/* Copyright (C) 1996 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
Bash is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Bash 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with Bash. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _UNIONWAIT_H
#define _UNIONWAIT_H
#if !defined (WORDS_BIGENDIAN)
union wait
{
int w_status; /* used in syscall */
/* Terminated process status. */
struct
{
unsigned short
w_Termsig : 7, /* termination signal */
w_Coredump : 1, /* core dump indicator */
w_Retcode : 8, /* exit code if w_termsig==0 */
w_Fill1 : 16; /* high 16 bits unused */
} w_T;
/* Stopped process status. Returned
only for traced children unless requested
with the WUNTRACED option bit. */
struct
{
unsigned short
w_Stopval : 8, /* == W_STOPPED if stopped */
w_Stopsig : 8, /* actually zero on XENIX */
w_Fill2 : 16; /* high 16 bits unused */
} w_S;
};
#else /* WORDS_BIGENDIAN */
/* This is for big-endian machines like the IBM RT, HP 9000, or Sun-3 */
union wait
{
int w_status; /* used in syscall */
/* Terminated process status. */
struct
{
unsigned short w_Fill1 : 16; /* high 16 bits unused */
unsigned w_Retcode : 8; /* exit code if w_termsig==0 */
unsigned w_Coredump : 1; /* core dump indicator */
unsigned w_Termsig : 7; /* termination signal */
} w_T;
/* Stopped process status. Returned
only for traced children unless requested
with the WUNTRACED option bit. */
struct
{
unsigned short w_Fill2 : 16; /* high 16 bits unused */
unsigned w_Stopsig : 8; /* signal that stopped us */
unsigned w_Stopval : 8; /* == W_STOPPED if stopped */
} w_S;
};
#endif /* WORDS_BIGENDIAN */
#define w_termsig w_T.w_Termsig
#define w_coredump w_T.w_Coredump
#define w_retcode w_T.w_Retcode
#define w_stopval w_S.w_Stopval
#define w_stopsig w_S.w_Stopsig
#define WSTOPPED 0177
#define WIFSTOPPED(x) ((x).w_stopval == WSTOPPED)
#define WIFEXITED(x) ((x).w_stopval != WSTOPPED && (x).w_termsig == 0)
#define WIFSIGNALED(x) ((x).w_stopval != WSTOPPED && (x).w_termsig != 0)
#define WTERMSIG(x) ((x).w_termsig)
#define WSTOPSIG(x) ((x).w_stopsig)
#define WEXITSTATUS(x) ((x).w_retcode)
#define WIFCORED(x) ((x).w_coredump)
#endif /* _UNIONWAIT_H */
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