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+/* Definitions of status bits for `wait' et al.
+ Copyright (C) 1992, 1994, 1996, 1997 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., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#ifndef _SYS_WAIT_H
+#error "Never use <bits/waitstatus.h> directly; include <sys/wait.h> instead."
+#endif
+
+
+/* Everything extant so far uses these same bits. */
+
+
+/* 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 __status = (status); \
+ !__WIFSTOPPED(__status) && !__WIFEXITED(__status); }))
+#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
+ {
+ int w_status;
+ 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. */