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+/* Definitions of status bits for `wait' et al.
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+ Copyright (C) 1992, 1994, 1996, 1997 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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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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+
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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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+
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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 not,
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+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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+ Boston, MA 02111-1307, USA. */
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+
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+#ifndef _SYS_WAIT_H
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+# error "Never include <bits/waitstatus.h> directly; use <sys/wait.h> instead."
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+#endif
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+
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+
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+/* Everything extant so far uses these same bits. */
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+
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+
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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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+
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+/* If WIFSIGNALED(STATUS), the terminating signal. */
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+#define __WTERMSIG(status) ((status) & 0x7f)
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+
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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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+
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+/* Nonzero if STATUS indicates normal termination. */
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+#define __WIFEXITED(status) (__WTERMSIG(status) == 0)
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+
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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 __status = (status); \
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+ !__WIFSTOPPED(__status) && !__WIFEXITED(__status); }))
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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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+
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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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+
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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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+
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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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+
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+
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+#ifdef __USE_BSD
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+
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+# include <endian.h>
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+
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+union wait
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+ {
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+ int w_status;
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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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+
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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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+
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+#endif /* Use BSD. */
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