include/unionwait.h

   1 /* unionwait.h -- definitions for using a `union wait' on systems without
   2    one. */
   3
   4 /* Copyright (C) 1996 Free Software Foundation, Inc.
   5
   6    This file is part of GNU Bash, the Bourne Again SHell.
   7
   8    Bash is free software: you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation, either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    Bash is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with Bash.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #ifndef _UNIONWAIT_H
  23 #define _UNIONWAIT_H
  24
  25 #if !defined (WORDS_BIGENDIAN)
  26 union wait
  27   {
  28     int w_status;               /* used in syscall */
  29
  30     /* Terminated process status. */
  31     struct
  32       {
  33         unsigned short
  34           w_Termsig  : 7,       /* termination signal */
  35           w_Coredump : 1,       /* core dump indicator */
  36           w_Retcode  : 8,       /* exit code if w_termsig==0 */
  37           w_Fill1    : 16;      /* high 16 bits unused */
  38       } w_T;
  39
  40     /* Stopped process status.  Returned
  41        only for traced children unless requested
  42        with the WUNTRACED option bit. */
  43     struct
  44       {
  45         unsigned short
  46           w_Stopval : 8,        /* == W_STOPPED if stopped */
  47           w_Stopsig : 8,        /* actually zero on XENIX */
  48           w_Fill2   : 16;       /* high 16 bits unused */
  49       } w_S;
  50   };
  51
  52 #else  /* WORDS_BIGENDIAN */
  53
  54 /* This is for big-endian machines like the IBM RT, HP 9000, or Sun-3 */
  55
  56 union wait
  57   {
  58     int w_status;               /* used in syscall */
  59
  60     /* Terminated process status. */
  61     struct
  62       {
  63         unsigned short w_Fill1    : 16; /* high 16 bits unused */
  64         unsigned       w_Retcode  : 8;  /* exit code if w_termsig==0 */
  65         unsigned       w_Coredump : 1;  /* core dump indicator */
  66         unsigned       w_Termsig  : 7;  /* termination signal */
  67       } w_T;
  68
  69     /* Stopped process status.  Returned
  70        only for traced children unless requested
  71        with the WUNTRACED option bit. */
  72     struct
  73       {
  74         unsigned short w_Fill2   : 16;  /* high 16 bits unused */
  75         unsigned       w_Stopsig : 8;   /* signal that stopped us */
  76         unsigned       w_Stopval : 8;   /* == W_STOPPED if stopped */
  77       } w_S;
  78   };
  79
  80 #endif /* WORDS_BIGENDIAN */
  81
  82 #define w_termsig  w_T.w_Termsig
  83 #define w_coredump w_T.w_Coredump
  84 #define w_retcode  w_T.w_Retcode
  85 #define w_stopval  w_S.w_Stopval
  86 #define w_stopsig  w_S.w_Stopsig
  87
  88 #define WSTOPPED       0177
  89 #define WIFSTOPPED(x)  ((x).w_stopval == WSTOPPED)
  90 #define WIFEXITED(x)   ((x).w_stopval != WSTOPPED && (x).w_termsig == 0)
  91 #define WIFSIGNALED(x) ((x).w_stopval != WSTOPPED && (x).w_termsig != 0)
  92
  93 #define WTERMSIG(x)    ((x).w_termsig)
  94 #define WSTOPSIG(x)    ((x).w_stopsig)
  95 #define WEXITSTATUS(x) ((x).w_retcode)
  96 #define WIFCORED(x)    ((x).w_coredump)
  97
  98 #endif /* _UNIONWAIT_H */