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.  */