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Diffstat (limited to 'sysdeps/generic/bits/waitstatus.h')
| -rw-r--r-- | sysdeps/generic/bits/waitstatus.h | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/sysdeps/generic/bits/waitstatus.h b/sysdeps/generic/bits/waitstatus.h new file mode 100644 index 0000000000..699c224989 --- /dev/null +++ b/sysdeps/generic/bits/waitstatus.h @@ -0,0 +1,106 @@ +/* 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. */ |