1/* Definitions of status bits for `wait' et al.
 2   Copyright (C) 1992-2025 Free Software Foundation, Inc.
 3   This file is part of the GNU C Library.
 4
 5   The GNU C Library is free software; you can redistribute it and/or
 6   modify it under the terms of the GNU Lesser General Public
 7   License as published by the Free Software Foundation; either
 8   version 2.1 of the License, or (at your option) any later version.
 9
10   The GNU C Library is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13   Lesser General Public License for more details.
14
15   You should have received a copy of the GNU Lesser General Public
16   License along with the GNU C Library; if not, see
17   <https://www.gnu.org/licenses/>.  */
18
19#if !defined _SYS_WAIT_H && !defined _STDLIB_H
20# error "Never include <bits/waitstatus.h> directly; use <sys/wait.h> instead."
21#endif
22
23
24/* Everything extant so far uses these same bits.  */
25
26
27/* If WIFEXITED(STATUS), the low-order 8 bits of the status.  */
28#define	__WEXITSTATUS(status)	(((status) & 0xff00) >> 8)
29
30/* If WIFSIGNALED(STATUS), the terminating signal.  */
31#define	__WTERMSIG(status)	((status) & 0x7f)
32
33/* If WIFSTOPPED(STATUS), the signal that stopped the child.  */
34#define	__WSTOPSIG(status)	__WEXITSTATUS(status)
35
36/* Nonzero if STATUS indicates normal termination.  */
37#define	__WIFEXITED(status)	(__WTERMSIG(status) == 0)
38
39/* Nonzero if STATUS indicates termination by a signal.  */
40#define __WIFSIGNALED(status) \
41  (((signed char) (((status) & 0x7f) + 1) >> 1) > 0)
42
43/* Nonzero if STATUS indicates the child is stopped.  */
44#define	__WIFSTOPPED(status)	(((status) & 0xff) == 0x7f)
45
46/* Nonzero if STATUS indicates the child continued after a stop.  We only
47   define this if <bits/waitflags.h> provides the WCONTINUED flag bit.  */
48#ifdef WCONTINUED
49# define __WIFCONTINUED(status)	((status) == __W_CONTINUED)
50#endif
51
52/* Nonzero if STATUS indicates the child dumped core.  */
53#define	__WCOREDUMP(status)	((status) & __WCOREFLAG)
54
55/* Macros for constructing status values.  */
56#define	__W_EXITCODE(ret, sig)	((ret) << 8 | (sig))
57#define	__W_STOPCODE(sig)	((sig) << 8 | 0x7f)
58#define __W_CONTINUED		0xffff
59#define	__WCOREFLAG		0x80