1 /* Definitions of status bits for `wait' et al. 2 Copyright (C) 1992, 1994, 1996, 1997, 2000 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, write to the Free 17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 18 02111-1307 USA. */ 19 20 #if !defined _SYS_WAIT_H && !defined _STDLIB_H 21 # error "Never include <bits/waitstatus.h> directly; use <sys/wait.h> instead." 22 #endif 23 24 25 /* Everything extant so far uses these same bits. */ 26 27 28 /* If WIFEXITED(STATUS), the low-order 8 bits of the status. */ 29 #define __WEXITSTATUS(status) (((status) & 0xff00) >> 8) 30 31 /* If WIFSIGNALED(STATUS), the terminating signal. */ 32 #define __WTERMSIG(status) ((status) & 0x7f) 33 34 /* If WIFSTOPPED(STATUS), the signal that stopped the child. */ 35 #define __WSTOPSIG(status) __WEXITSTATUS(status) 36 37 /* Nonzero if STATUS indicates normal termination. */ 38 #define __WIFEXITED(status) (__WTERMSIG(status) == 0) 39 40 /* Nonzero if STATUS indicates termination by a signal. */ 41 #ifdef __GNUC__ 42 # define __WIFSIGNALED(status) \ 43 (__extension__ ({ int __status = (status); \ 44 !__WIFSTOPPED(__status) && !__WIFEXITED(__status); })) 45 #else /* Not GCC. */ 46 # define __WIFSIGNALED(status) (!__WIFSTOPPED(status) && !__WIFEXITED(status)) 47 #endif /* GCC. */ 48 49 /* Nonzero if STATUS indicates the child is stopped. */ 50 #define __WIFSTOPPED(status) (((status) & 0xff) == 0x7f) 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 __WCOREFLAG 0x80 59 60 61 #ifdef __USE_BSD 62 63 # include <endian.h> 64 65 union wait 66 { 67 int w_status; 68 struct 69 { 70 # if __BYTE_ORDER == __LITTLE_ENDIAN 71 unsigned int __w_termsig:7; /* Terminating signal. */ 72 unsigned int __w_coredump:1; /* Set if dumped core. */ 73 unsigned int __w_retcode:8; /* Return code if exited normally. */ 74 unsigned int:16; 75 # endif /* Little endian. */ 76 # if __BYTE_ORDER == __BIG_ENDIAN 77 unsigned int:16; 78 unsigned int __w_retcode:8; 79 unsigned int __w_coredump:1; 80 unsigned int __w_termsig:7; 81 # endif /* Big endian. */ 82 } __wait_terminated; 83 struct 84 { 85 # if __BYTE_ORDER == __LITTLE_ENDIAN 86 unsigned int __w_stopval:8; /* W_STOPPED if stopped. */ 87 unsigned int __w_stopsig:8; /* Stopping signal. */ 88 unsigned int:16; 89 # endif /* Little endian. */ 90 # if __BYTE_ORDER == __BIG_ENDIAN 91 unsigned int:16; 92 unsigned int __w_stopsig:8; /* Stopping signal. */ 93 unsigned int __w_stopval:8; /* W_STOPPED if stopped. */ 94 # endif /* Big endian. */ 95 } __wait_stopped; 96 }; 97 98 # define w_termsig __wait_terminated.__w_termsig 99 # define w_coredump __wait_terminated.__w_coredump 100 # define w_retcode __wait_terminated.__w_retcode 101 # define w_stopsig __wait_stopped.__w_stopsig 102 # define w_stopval __wait_stopped.__w_stopval 103 104 #endif /* Use BSD. */ 105