/* Definitions of status bits for `wait' et al.

   Copyright (C) 1992-2018 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 Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 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

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#if !defined _SYS_WAIT_H && !defined _STDLIB_H

# error "Never include <bits/waitstatus.h> directly; use <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.  */

#define __WIFSIGNALED(status) \

  (((signed char) (((status) & 0x7f) + 1) >> 1) > 0)

/* Nonzero if STATUS indicates the child is stopped.  */

#define	__WIFSTOPPED(status)	(((status) & 0xff) == 0x7f)

/* Nonzero if STATUS indicates the child continued after a stop.  We only

   define this if <bits/waitflags.h> provides the WCONTINUED flag bit.  */

#ifdef WCONTINUED

# define __WIFCONTINUED(status)	((status) == __W_CONTINUED)

#endif

/* 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 __W_CONTINUED		0xffff

#define	__WCOREFLAG		0x80