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104 lines
3.4 KiB
C
104 lines
3.4 KiB
C
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/* Definitions of status bits for `wait' et al.
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Copyright (C) 1992, 1994 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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/* Everything extant so far uses these same bits. */
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#ifndef _WAITSTATUS_H
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#define _WAITSTATUS_H
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/* If WIFEXITED(STATUS), the low-order 8 bits of the status. */
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#define __WEXITSTATUS(status) (((status) & 0xff00) >> 8)
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/* If WIFSIGNALED(STATUS), the terminating signal. */
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#define __WTERMSIG(status) ((status) & 0x7f)
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/* If WIFSTOPPED(STATUS), the signal that stopped the child. */
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#define __WSTOPSIG(status) __WEXITSTATUS(status)
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/* Nonzero if STATUS indicates normal termination. */
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#define __WIFEXITED(status) (__WTERMSIG(status) == 0)
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/* Nonzero if STATUS indicates termination by a signal. */
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#ifdef __GNUC__
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#define __WIFSIGNALED(status) \
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(__extension__ ({ int __stat = (status); \
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!__WIFSTOPPED(__stat) && !__WIFEXITED(__stat); }))
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#else /* Not GCC. */
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#define __WIFSIGNALED(status) (!__WIFSTOPPED(status) && !__WIFEXITED(status))
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#endif /* GCC. */
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/* Nonzero if STATUS indicates the child is stopped. */
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#define __WIFSTOPPED(status) (((status) & 0xff) == 0x7f)
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/* Nonzero if STATUS indicates the child dumped core. */
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#define __WCOREDUMP(status) ((status) & __WCOREFLAG)
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/* Macros for constructing status values. */
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#define __W_EXITCODE(ret, sig) ((ret) << 8 | (sig))
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#define __W_STOPCODE(sig) ((sig) << 8 | 0x7f)
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#define __WCOREFLAG 0x80
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#ifdef __USE_BSD
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#include <endian.h>
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union wait
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{
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struct
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{
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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unsigned int __w_termsig:7; /* Terminating signal. */
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unsigned int __w_coredump:1; /* Set if dumped core. */
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unsigned int __w_retcode:8; /* Return code if exited normally. */
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unsigned int:16;
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#endif /* Little endian. */
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#if __BYTE_ORDER == __BIG_ENDIAN
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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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#endif /* Big endian. */
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} __wait_terminated;
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struct
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{
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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unsigned int __w_stopval:8; /* W_STOPPED if stopped. */
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unsigned int __w_stopsig:8; /* Stopping signal. */
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unsigned int:16;
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#endif /* Little endian. */
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#if __BYTE_ORDER == __BIG_ENDIAN
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unsigned int:16;
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unsigned int __w_stopsig:8; /* Stopping signal. */
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unsigned int __w_stopval:8; /* W_STOPPED if stopped. */
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#endif /* Big endian. */
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} __wait_stopped;
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};
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#define w_termsig __wait_terminated.__w_termsig
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#define w_coredump __wait_terminated.__w_coredump
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#define w_retcode __wait_terminated.__w_retcode
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#define w_stopsig __wait_stopped.__w_stopsig
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#define w_stopval __wait_stopped.__w_stopval
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#endif /* Use BSD. */
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#endif /* waitstatus.h */
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