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 it under
9   the terms of the GNU General Public License as published by the Free
10   Software Foundation; either version 2, or (at your option) any later
11   version.
12
13   Bash is distributed in the hope that it will be useful, but WITHOUT ANY
14   WARRANTY; without even the implied warranty of MERCHANTABILITY or
15   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
16   for more details.
17
18   You should have received a copy of the GNU General Public License along
19   with Bash; see the file COPYING.  If not, write to the Free Software
20   Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
21
22#ifndef _UNIONWAIT_H
23#define _UNIONWAIT_H
24
25#if !defined (WORDS_BIGENDIAN)
26union 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
56union 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 */
99