| /* Definitions of status bits for `wait' et al. |
| Copyright (C) 1992,1994,1996,1997,2000,2004 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #if !defined _SYS_WAIT_H && !defined _STDLIB_H |
| # error "Never include <bits/waitstatus.h> directly; use <sys/wait.h> instead." |
| #endif |
| |
| |
| /* Everything extant so far uses these same bits. */ |
| |
| |
| /* If WIFEXITED(STATUS), the low-order 8 bits of the status. */ |
| #define __WEXITSTATUS(status) (((status) & 0xff00) >> 8) |
| |
| /* If WIFSIGNALED(STATUS), the terminating signal. */ |
| #define __WTERMSIG(status) ((status) & 0x7f) |
| |
| /* If WIFSTOPPED(STATUS), the signal that stopped the child. */ |
| #define __WSTOPSIG(status) __WEXITSTATUS(status) |
| |
| /* Nonzero if STATUS indicates normal termination. */ |
| #define __WIFEXITED(status) (__WTERMSIG(status) == 0) |
| |
| /* Nonzero if STATUS indicates termination by a signal. */ |
| #define __WIFSIGNALED(status) \ |
| (((signed char) (((status) & 0x7f) + 1) >> 1) > 0) |
| |
| /* Nonzero if STATUS indicates the child is stopped. */ |
| #define __WIFSTOPPED(status) (((status) & 0xff) == 0x7f) |
| |
| /* Nonzero if STATUS indicates the child continued after a stop. We only |
| define this if <bits/waitflags.h> provides the WCONTINUED flag bit. */ |
| #ifdef WCONTINUED |
| # define __WIFCONTINUED(status) ((status) == __W_CONTINUED) |
| #endif |
| |
| /* Nonzero if STATUS indicates the child dumped core. */ |
| #define __WCOREDUMP(status) ((status) & __WCOREFLAG) |
| |
| /* Macros for constructing status values. */ |
| #define __W_EXITCODE(ret, sig) ((ret) << 8 | (sig)) |
| #define __W_STOPCODE(sig) ((sig) << 8 | 0x7f) |
| #define __W_CONTINUED 0xffff |
| #define __WCOREFLAG 0x80 |
| |
| |
| #ifdef __USE_BSD |
| |
| # include <endian.h> |
| |
| union wait |
| { |
| int w_status; |
| struct |
| { |
| # if __BYTE_ORDER == __LITTLE_ENDIAN |
| unsigned int __w_termsig:7; /* Terminating signal. */ |
| unsigned int __w_coredump:1; /* Set if dumped core. */ |
| unsigned int __w_retcode:8; /* Return code if exited normally. */ |
| unsigned int:16; |
| # endif /* Little endian. */ |
| # if __BYTE_ORDER == __BIG_ENDIAN |
| unsigned int:16; |
| unsigned int __w_retcode:8; |
| unsigned int __w_coredump:1; |
| unsigned int __w_termsig:7; |
| # endif /* Big endian. */ |
| } __wait_terminated; |
| struct |
| { |
| # if __BYTE_ORDER == __LITTLE_ENDIAN |
| unsigned int __w_stopval:8; /* W_STOPPED if stopped. */ |
| unsigned int __w_stopsig:8; /* Stopping signal. */ |
| unsigned int:16; |
| # endif /* Little endian. */ |
| # if __BYTE_ORDER == __BIG_ENDIAN |
| unsigned int:16; |
| unsigned int __w_stopsig:8; /* Stopping signal. */ |
| unsigned int __w_stopval:8; /* W_STOPPED if stopped. */ |
| # endif /* Big endian. */ |
| } __wait_stopped; |
| }; |
| |
| # define w_termsig __wait_terminated.__w_termsig |
| # define w_coredump __wait_terminated.__w_coredump |
| # define w_retcode __wait_terminated.__w_retcode |
| # define w_stopsig __wait_stopped.__w_stopsig |
| # define w_stopval __wait_stopped.__w_stopval |
| |
| #endif /* Use BSD. */ |
