| 1 | /* Definitions of status bits for `wait' et al. |
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| 2 | Copyright (C) 1992, 1994, 1996, 1997, 2000 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, write to the Free |
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| 17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
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| 18 | 02111-1307 USA. */ |
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| 19 | |
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| 20 | #if !defined _SYS_WAIT_H && !defined _STDLIB_H |
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| 21 | # error "Never include <bits/waitstatus.h> directly; use <sys/wait.h> instead." |
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| 22 | #endif |
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| 23 | |
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| 24 | |
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| 25 | /* Everything extant so far uses these same bits. */ |
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| 26 | |
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| 27 | |
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| 28 | /* If WIFEXITED(STATUS), the low-order 8 bits of the status. */ |
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| 29 | #define __WEXITSTATUS(status) (((status) & 0xff00) >> 8) |
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| 30 | |
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| 31 | /* If WIFSIGNALED(STATUS), the terminating signal. */ |
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| 32 | #define __WTERMSIG(status) ((status) & 0x7f) |
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| 33 | |
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| 34 | /* If WIFSTOPPED(STATUS), the signal that stopped the child. */ |
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| 35 | #define __WSTOPSIG(status) __WEXITSTATUS(status) |
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| 36 | |
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| 37 | /* Nonzero if STATUS indicates normal termination. */ |
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| 38 | #define __WIFEXITED(status) (__WTERMSIG(status) == 0) |
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| 39 | |
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| 40 | /* Nonzero if STATUS indicates termination by a signal. */ |
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| 41 | #ifdef __GNUC__ |
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| 42 | # define __WIFSIGNALED(status) \ |
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| 43 | (__extension__ ({ int __status = (status); \ |
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| 44 | !__WIFSTOPPED(__status) && !__WIFEXITED(__status); })) |
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| 45 | #else /* Not GCC. */ |
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| 46 | # define __WIFSIGNALED(status) (!__WIFSTOPPED(status) && !__WIFEXITED(status)) |
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| 47 | #endif /* GCC. */ |
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| 48 | |
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| 49 | /* Nonzero if STATUS indicates the child is stopped. */ |
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| 50 | #define __WIFSTOPPED(status) (((status) & 0xff) == 0x7f) |
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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 __WCOREFLAG 0x80 |
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| 59 | |
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| 60 | |
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| 61 | #ifdef __USE_BSD |
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| 62 | |
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| 63 | # include <endian.h> |
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| 64 | |
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| 65 | union wait |
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| 66 | { |
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| 67 | int w_status; |
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| 68 | struct |
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| 69 | { |
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| 70 | # if __BYTE_ORDER == __LITTLE_ENDIAN |
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| 71 | unsigned int __w_termsig:7; /* Terminating signal. */ |
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| 72 | unsigned int __w_coredump:1; /* Set if dumped core. */ |
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| 73 | unsigned int __w_retcode:8; /* Return code if exited normally. */ |
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| 74 | unsigned int:16; |
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| 75 | # endif /* Little endian. */ |
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| 76 | # if __BYTE_ORDER == __BIG_ENDIAN |
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| 77 | unsigned int:16; |
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| 78 | unsigned int __w_retcode:8; |
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| 79 | unsigned int __w_coredump:1; |
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| 80 | unsigned int __w_termsig:7; |
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| 81 | # endif /* Big endian. */ |
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| 82 | } __wait_terminated; |
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| 83 | struct |
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| 84 | { |
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| 85 | # if __BYTE_ORDER == __LITTLE_ENDIAN |
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| 86 | unsigned int __w_stopval:8; /* W_STOPPED if stopped. */ |
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| 87 | unsigned int __w_stopsig:8; /* Stopping signal. */ |
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| 88 | unsigned int:16; |
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| 89 | # endif /* Little endian. */ |
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| 90 | # if __BYTE_ORDER == __BIG_ENDIAN |
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| 91 | unsigned int:16; |
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| 92 | unsigned int __w_stopsig:8; /* Stopping signal. */ |
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| 93 | unsigned int __w_stopval:8; /* W_STOPPED if stopped. */ |
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| 94 | # endif /* Big endian. */ |
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| 95 | } __wait_stopped; |
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| 96 | }; |
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| 97 | |
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| 98 | # define w_termsig __wait_terminated.__w_termsig |
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| 99 | # define w_coredump __wait_terminated.__w_coredump |
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| 100 | # define w_retcode __wait_terminated.__w_retcode |
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| 101 | # define w_stopsig __wait_stopped.__w_stopsig |
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| 102 | # define w_stopval __wait_stopped.__w_stopval |
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| 103 | |
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| 104 | #endif /* Use BSD. */ |
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