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waitstatus.h
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/* 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, see <http://www.gnu.org/licenses/>. */ #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. */