| 1 | /* Definitions of status bits for `wait' et al. |
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| 2 | Copyright (C) 1992-2022 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #if !defined _SYS_WAIT_H && !defined _STDLIB_H |
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| 20 | # error "Never include <bits/waitstatus.h> directly; use <sys/wait.h> instead." |
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| 21 | #endif |
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| 22 | |
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| 23 | |
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| 24 | /* Everything extant so far uses these same bits. */ |
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| 25 | |
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| 26 | |
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| 27 | /* If WIFEXITED(STATUS), the low-order 8 bits of the status. */ |
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| 28 | #define __WEXITSTATUS(status) (((status) & 0xff00) >> 8) |
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| 29 | |
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| 30 | /* If WIFSIGNALED(STATUS), the terminating signal. */ |
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| 31 | #define __WTERMSIG(status) ((status) & 0x7f) |
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| 32 | |
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| 33 | /* If WIFSTOPPED(STATUS), the signal that stopped the child. */ |
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| 34 | #define __WSTOPSIG(status) __WEXITSTATUS(status) |
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| 35 | |
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| 36 | /* Nonzero if STATUS indicates normal termination. */ |
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| 37 | #define __WIFEXITED(status) (__WTERMSIG(status) == 0) |
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| 38 | |
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| 39 | /* Nonzero if STATUS indicates termination by a signal. */ |
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| 40 | #define __WIFSIGNALED(status) \ |
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| 41 | (((signed char) (((status) & 0x7f) + 1) >> 1) > 0) |
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| 42 | |
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| 43 | /* Nonzero if STATUS indicates the child is stopped. */ |
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| 44 | #define __WIFSTOPPED(status) (((status) & 0xff) == 0x7f) |
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| 45 | |
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| 46 | /* Nonzero if STATUS indicates the child continued after a stop. We only |
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| 47 | define this if <bits/waitflags.h> provides the WCONTINUED flag bit. */ |
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| 48 | #ifdef WCONTINUED |
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| 49 | # define __WIFCONTINUED(status) ((status) == __W_CONTINUED) |
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| 50 | #endif |
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| 51 | |
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| 52 | /* Nonzero if STATUS indicates the child dumped core. */ |
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| 53 | #define __WCOREDUMP(status) ((status) & __WCOREFLAG) |
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| 54 | |
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| 55 | /* Macros for constructing status values. */ |
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| 56 | #define __W_EXITCODE(ret, sig) ((ret) << 8 | (sig)) |
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| 57 | #define __W_STOPCODE(sig) ((sig) << 8 | 0x7f) |
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| 58 | #define __W_CONTINUED 0xffff |
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| 59 | #define __WCOREFLAG 0x80 |
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| 60 | |
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