1 /* Definitions of status bits for `wait' et al. 2 Copyright (C) 1992,1994,1996,1997,2000,2004 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 #define __WIFSIGNALED(status) \ 42 (((signed char) (((status) & 0x7f) + 1) >> 1) > 0) 43 44 /* Nonzero if STATUS indicates the child is stopped. */ 45 #define __WIFSTOPPED(status) (((status) & 0xff) == 0x7f) 46 47 /* Nonzero if STATUS indicates the child continued after a stop. We only 48 define this if <bits/waitflags.h> provides the WCONTINUED flag bit. */ 49 #ifdef WCONTINUED 50 # define __WIFCONTINUED(status) ((status) == __W_CONTINUED) 51 #endif 52 53 /* Nonzero if STATUS indicates the child dumped core. */ 54 #define __WCOREDUMP(status) ((status) & __WCOREFLAG) 55 56 /* Macros for constructing status values. */ 57 #define __W_EXITCODE(ret, sig) ((ret) << 8 | (sig)) 58 #define __W_STOPCODE(sig) ((sig) << 8 | 0x7f) 59 #define __W_CONTINUED 0xffff 60 #define __WCOREFLAG 0x80 61 62 63 #ifdef __USE_BSD 64 65 # include <endian.h> 66 67 union wait 68 { 69 int w_status; 70 struct 71 { 72 # if __BYTE_ORDER == __LITTLE_ENDIAN 73 unsigned int __w_termsig:7; /* Terminating signal. */ 74 unsigned int __w_coredump:1; /* Set if dumped core. */ 75 unsigned int __w_retcode:8; /* Return code if exited normally. */ 76 unsigned int:16; 77 # endif /* Little endian. */ 78 # if __BYTE_ORDER == __BIG_ENDIAN 79 unsigned int:16; 80 unsigned int __w_retcode:8; 81 unsigned int __w_coredump:1; 82 unsigned int __w_termsig:7; 83 # endif /* Big endian. */ 84 } __wait_terminated; 85 struct 86 { 87 # if __BYTE_ORDER == __LITTLE_ENDIAN 88 unsigned int __w_stopval:8; /* W_STOPPED if stopped. */ 89 unsigned int __w_stopsig:8; /* Stopping signal. */ 90 unsigned int:16; 91 # endif /* Little endian. */ 92 # if __BYTE_ORDER == __BIG_ENDIAN 93 unsigned int:16; 94 unsigned int __w_stopsig:8; /* Stopping signal. */ 95 unsigned int __w_stopval:8; /* W_STOPPED if stopped. */ 96 # endif /* Big endian. */ 97 } __wait_stopped; 98 }; 99 100 # define w_termsig __wait_terminated.__w_termsig 101 # define w_coredump __wait_terminated.__w_coredump 102 # define w_retcode __wait_terminated.__w_retcode 103 # define w_stopsig __wait_stopped.__w_stopsig 104 # define w_stopval __wait_stopped.__w_stopval 105 106 #endif /* Use BSD. */ 107