waitstatus.h source code [include/x86_64-linux-gnu/bits/waitstatus.h]

1	/* Definitions of status bits for `wait' et al.
2	Copyright (C) 1992-2016 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	<http://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
60
61
62	#ifdef __USE_MISC
63
64	# include <endian.h>
65
66	union wait
67	{
68	int w_status;
69	struct
70	{
71	# if __BYTE_ORDER == __LITTLE_ENDIAN
72	unsigned int __w_termsig:7; /* Terminating signal. */
73	unsigned int __w_coredump:1; /* Set if dumped core. */
74	unsigned int __w_retcode:8; /* Return code if exited normally. */
75	unsigned int:16;
76	# endif /* Little endian. */
77	# if __BYTE_ORDER == __BIG_ENDIAN
78	unsigned int:16;
79	unsigned int __w_retcode:8;
80	unsigned int __w_coredump:1;
81	unsigned int __w_termsig:7;
82	# endif /* Big endian. */
83	} __wait_terminated;
84	struct
85	{
86	# if __BYTE_ORDER == __LITTLE_ENDIAN
87	unsigned int __w_stopval:8; /* W_STOPPED if stopped. */
88	unsigned int __w_stopsig:8; /* Stopping signal. */
89	unsigned int:16;
90	# endif /* Little endian. */
91	# if __BYTE_ORDER == __BIG_ENDIAN
92	unsigned int:16;
93	unsigned int __w_stopsig:8; /* Stopping signal. */
94	unsigned int __w_stopval:8; /* W_STOPPED if stopped. */
95	# endif /* Big endian. */
96	} __wait_stopped;
97	};
98
99	# define w_termsig __wait_terminated.__w_termsig
100	# define w_coredump __wait_terminated.__w_coredump
101	# define w_retcode __wait_terminated.__w_retcode
102	# define w_stopsig __wait_stopped.__w_stopsig
103	# define w_stopval __wait_stopped.__w_stopval
104
105	#endif /* Use misc. */
106

wait::w_status

wait::(anonymous struct)::__w_termsig

wait::(anonymous struct)::__w_coredump

wait::(anonymous struct)::__w_retcode

wait::__wait_terminated

wait::(anonymous struct)::__w_stopval

wait::(anonymous struct)::__w_stopsig

wait::__wait_stopped

Clang Project