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[emacs.git] / src / syswait.h
blob692c202da1bb8e726ec90f809f1cf10771ae81c4
1 /* Define wait system call interface for Emacs.
2 Copyright (C) 1993, 1994, 1995, 2000 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
6 GNU Emacs is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
9 any later version.
11 GNU Emacs is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU Emacs; see the file COPYING. If not, write to
18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 /* Define the structure that the wait system call stores.
22 On many systems, there is a structure defined for this.
23 But on vanilla-ish USG systems there is not. */
25 #ifndef EMACS_SYSWAIT_H
26 #define EMACS_SYSWAIT_H
28 #ifndef VMS
30 /* Try the approach recommended by autoconf. If this doesn't cause
31 trouble anywhere, remove the original code, which is #if'd out
32 below. */
34 #if 1
35 #include <sys/types.h>
37 /* Old code included a comment that HPUX version 7 has broken
38 definitions of some of the macros and `the convex' does too.
39 HAVE_SYS_WAIT_H probably won't be defined on them if they still get
40 used, but for safety... -- fx */
41 #if (defined (HPUX) && !defined (HPUX8)) || defined (convex)
42 #undef HAVE_SYS_WAIT_H
43 #endif
45 #if defined HAVE_SYS_WAIT_H /* We have sys/wait.h with POSIXoid
46 definitions. */
48 #include <sys/wait.h>
49 #ifndef WCOREDUMP /* not POSIX */
50 #define WCOREDUMP(status) ((status) & 0x80)
51 #endif
53 #else /* !HAVE_SYS_WAIT_H */
55 /* Note that sys/wait.h may still be included by stdlib.h or something
56 according to XPG. */
58 #undef WEXITSTATUS
59 #define WEXITSTATUS(status) (((status) & 0xff00) >> 8)
60 #undef WIFEXITED
61 #define WIFEXITED(status) (WTERMSIG(status) == 0)
62 #undef WIFSTOPPED
63 #define WIFSTOPPED(status) (((status) & 0xff) == 0x7f)
64 #undef WIFSIGNALED
65 #define WIFSIGNALED(status) (!WIFSTOPPED(status) && !WIFEXITED(status))
66 #undef WSTOPSIG
67 #define WSTOPSIG(status) WEXITSTATUS(status)
68 #undef WTERMSIG
69 #define WTERMSIG(status) ((status) & 0x7f)
70 #undef WCOREDUMP
71 #define WCOREDUMP(status) ((status) & 0x80)
72 #endif /* HAVE_SYS_WAIT_H */
74 #undef WAITTYPE
75 #define WAITTYPE int
76 #undef WRETCODE
77 #define WRETCODE(status) WEXITSTATUS (status)
79 #else /* !1 */
81 #ifndef WAITTYPE
83 #ifdef WAIT_USE_INT
84 /* Some systems have union wait in their header, but we should use
85 int regardless of that. */
86 #include <sys/wait.h>
87 #define WAITTYPE int
88 #define WRETCODE(w) WEXITSTATUS (w)
90 #else /* not WAIT_USE_INT */
92 #if (!defined (BSD_SYSTEM) && !defined (UNIPLUS) && !defined (STRIDE) && !(defined (HPUX) && !defined (NOMULTIPLEJOBS)) && !defined (HAVE_WAIT_HEADER))
93 #define WAITTYPE int
94 #define WIFSTOPPED(w) ((w&0377) == 0177)
95 #define WIFSIGNALED(w) ((w&0377) != 0177 && (w&~0377) == 0)
96 #define WIFEXITED(w) ((w&0377) == 0)
97 #define WRETCODE(w) (w >> 8)
98 #define WSTOPSIG(w) (w >> 8)
99 #define WTERMSIG(w) (w & 0177)
100 #ifndef WCOREDUMP
101 #define WCOREDUMP(w) ((w&0200) != 0)
102 #endif
104 #else
106 #ifdef BSD4_1
107 #include <wait.h>
108 #else
109 #include <sys/wait.h>
110 #endif /* not BSD 4.1 */
112 #define WAITTYPE union wait
113 #define WRETCODE(w) w.w_retcode
114 #undef WCOREDUMP /* Later BSDs define this name differently. */
115 #define WCOREDUMP(w) w.w_coredump
117 #if defined (HPUX) || defined (convex)
118 /* HPUX version 7 has broken definitions of these. */
119 /* pvogel@convex.com says the convex does too. */
120 #undef WTERMSIG
121 #undef WSTOPSIG
122 #undef WIFSTOPPED
123 #undef WIFSIGNALED
124 #undef WIFEXITED
125 #endif /* HPUX | convex */
127 #ifndef WTERMSIG
128 #define WTERMSIG(w) w.w_termsig
129 #endif
130 #ifndef WSTOPSIG
131 #define WSTOPSIG(w) w.w_stopsig
132 #endif
133 #ifndef WIFSTOPPED
134 #define WIFSTOPPED(w) (WTERMSIG (w) == 0177)
135 #endif
136 #ifndef WIFSIGNALED
137 #define WIFSIGNALED(w) (WTERMSIG (w) != 0177 && (WSTOPSIG (w)) == 0)
138 #endif
139 #ifndef WIFEXITED
140 #define WIFEXITED(w) (WTERMSIG (w) == 0)
141 #endif
142 #endif /* BSD_SYSTEM || UNIPLUS || STRIDE || HPUX */
143 #endif /* not WAIT_USE_INT */
144 #endif /* no WAITTYPE */
146 #endif /* 1 */
148 #else /* VMS */
150 #define WAITTYPE int
151 #define WIFSTOPPED(w) 0
152 #define WIFSIGNALED(w) 0
153 #define WIFEXITED(w) ((w) != -1)
154 #define WRETCODE(w) (w)
155 #define WSTOPSIG(w) (w)
156 #define WCOREDUMP(w) 0
157 #define WTERMSIG(w) (w)
158 #include <ssdef.h>
159 #include <iodef.h>
160 #include <clidef.h>
161 #include "vmsproc.h"
163 #endif /* VMS */
165 #endif /* EMACS_SYSWAIT_H */