1/* Define wait system call interface for Emacs.
2   Copyright (C) 1993, 1994, 1995, 2000, 2001, 2002, 2003, 2004,
3                 2005, 2006, 2007  Free Software Foundation, Inc.
4
5This file is part of GNU Emacs.
6
7GNU Emacs is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 2, or (at your option)
10any later version.
11
12GNU Emacs is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with GNU Emacs; see the file COPYING.  If not, write to
19the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20Boston, MA 02110-1301, USA.  */
21
22/* Define the structure that the wait system call stores.
23   On many systems, there is a structure defined for this.
24   But on vanilla-ish USG systems there is not.  */
25
26#ifndef EMACS_SYSWAIT_H
27#define EMACS_SYSWAIT_H
28
29#ifndef VMS
30
31/* This is now really the approach recommended by Autoconf.  If this
32   doesn't cause trouble anywhere, remove the original code, which is
33   #if'd out below.  */
34
35#if 1
36#include <sys/types.h>
37
38#ifdef HAVE_SYS_WAIT_H	/* We have sys/wait.h with POSIXoid definitions. */
39#include <sys/wait.h>
40#endif  /* !HAVE_SYS_WAIT_H */
41
42#ifndef WCOREDUMP		/* not POSIX */
43#define WCOREDUMP(status) ((status) & 0x80)
44#endif
45#ifndef WEXITSTATUS
46#define WEXITSTATUS(status) (((status)  & 0xff00) >> 8)
47#endif
48#ifndef WIFEXITED
49#define WIFEXITED(status) (WTERMSIG(status) == 0)
50#endif
51#ifndef WIFSTOPPED
52#define WIFSTOPPED(status) (((status) & 0xff) == 0x7f)
53#endif
54#ifndef WIFSIGNALED
55#define WIFSIGNALED(status) (!WIFSTOPPED(status) && !WIFEXITED(status))
56#endif
57#ifndef WSTOPSIG
58#define WSTOPSIG(status) WEXITSTATUS(status)
59#endif
60#ifndef WTERMSIG
61#define WTERMSIG(status) ((status) & 0x7f)
62#endif
63
64#undef WAITTYPE
65#define WAITTYPE int
66#undef WRETCODE
67#define WRETCODE(status) WEXITSTATUS (status)
68
69#else  /* 0 */
70
71#ifndef WAITTYPE
72
73#ifdef WAIT_USE_INT
74/* Some systems have  union wait  in their header, but we should use
75   int regardless of that.  */
76#include <sys/wait.h>
77#define WAITTYPE int
78#define WRETCODE(w) WEXITSTATUS (w)
79
80#else /* not WAIT_USE_INT */
81
82#if (!defined (BSD_SYSTEM) && !defined (UNIPLUS) && !defined (STRIDE) && !(defined (HPUX) && !defined (NOMULTIPLEJOBS)) && !defined (HAVE_WAIT_HEADER))
83#define WAITTYPE int
84#define WIFSTOPPED(w) ((w&0377) == 0177)
85#define WIFSIGNALED(w) ((w&0377) != 0177 && (w&~0377) == 0)
86#define WIFEXITED(w) ((w&0377) == 0)
87#define WRETCODE(w) (w >> 8)
88#define WSTOPSIG(w) (w >> 8)
89#define WTERMSIG(w) (w & 0177)
90#ifndef WCOREDUMP
91#define WCOREDUMP(w) ((w&0200) != 0)
92#endif
93
94#else
95
96#ifdef BSD4_1
97#include <wait.h>
98#else
99#include <sys/wait.h>
100#endif /* not BSD 4.1 */
101
102#define WAITTYPE union wait
103#define WRETCODE(w) w.w_retcode
104#undef WCOREDUMP		/* Later BSDs define this name differently.  */
105#define WCOREDUMP(w) w.w_coredump
106
107#if defined (HPUX) || defined (convex)
108/* HPUX version 7 has broken definitions of these.  */
109/* pvogel@convex.com says the convex does too.  */
110#undef WTERMSIG
111#undef WSTOPSIG
112#undef WIFSTOPPED
113#undef WIFSIGNALED
114#undef WIFEXITED
115#endif /* HPUX | convex */
116
117#ifndef WTERMSIG
118#define WTERMSIG(w) w.w_termsig
119#endif
120#ifndef WSTOPSIG
121#define WSTOPSIG(w) w.w_stopsig
122#endif
123#ifndef WIFSTOPPED
124#define WIFSTOPPED(w) (WTERMSIG (w) == 0177)
125#endif
126#ifndef WIFSIGNALED
127#define WIFSIGNALED(w) (WTERMSIG (w) != 0177 && (WSTOPSIG (w)) == 0)
128#endif
129#ifndef WIFEXITED
130#define WIFEXITED(w) (WTERMSIG (w) == 0)
131#endif
132#endif /* BSD_SYSTEM || UNIPLUS || STRIDE || HPUX */
133#endif /* not WAIT_USE_INT */
134#endif /* no WAITTYPE */
135
136#endif /* 0 */
137
138#else /* VMS */
139
140#define WAITTYPE int
141#define WIFSTOPPED(w) 0
142#define WIFSIGNALED(w) 0
143#define WIFEXITED(w) ((w) != -1)
144#define WRETCODE(w) (w)
145#define WSTOPSIG(w) (w)
146#define WCOREDUMP(w) 0
147#define WTERMSIG(w) (w)
148#include <ssdef.h>
149#include <iodef.h>
150#include <clidef.h>
151#include "vmsproc.h"
152
153#endif /* VMS */
154
155#endif /* EMACS_SYSWAIT_H */
156
157/* arch-tag: 7e5d9719-ec66-4b6f-89bb-563eea16a899
158   (do not change this comment) */
159