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 67union 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