1 | /* Definitions of status bits for `wait' et al. |
2 | Copyright (C) 1992-2018 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 | |