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[emacs.git] / src / syswait.h
blob1889c36a32e10288901d38dc3f66995220fd773d
1 /* Define wait system call interface for Emacs.
2 Copyright (C) 1993, 1994, 1995 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 VMS
26 #ifndef WAITTYPE
28 #ifdef WAIT_USE_INT
29 /* Some systems have union wait in their header, but we should use
30 int regardless of that. */
31 #include <sys/wait.h>
32 #define WAITTYPE int
33 #define WRETCODE(w) WEXITSTATUS (w)
35 #else /* not WAIT_USE_INT */
37 #if (!defined (BSD_SYSTEM) && !defined (UNIPLUS) && !defined (STRIDE) && !(defined (HPUX) && !defined (NOMULTIPLEJOBS)) && !defined (HAVE_WAIT_HEADER))
38 #define WAITTYPE int
39 #define WIFSTOPPED(w) ((w&0377) == 0177)
40 #define WIFSIGNALED(w) ((w&0377) != 0177 && (w&~0377) == 0)
41 #define WIFEXITED(w) ((w&0377) == 0)
42 #define WRETCODE(w) (w >> 8)
43 #define WSTOPSIG(w) (w >> 8)
44 #define WTERMSIG(w) (w & 0377)
45 #ifndef WCOREDUMP
46 #define WCOREDUMP(w) ((w&0200) != 0)
47 #endif
49 #else
51 #ifdef BSD4_1
52 #include <wait.h>
53 #else
54 #include <sys/wait.h>
55 #endif /* not BSD 4.1 */
57 #define WAITTYPE union wait
58 #define WRETCODE(w) w.w_retcode
59 #undef WCOREDUMP /* Later BSDs define this name differently. */
60 #define WCOREDUMP(w) w.w_coredump
62 #if defined (HPUX) || defined (convex)
63 /* HPUX version 7 has broken definitions of these. */
64 /* pvogel@convex.com says the convex does too. */
65 #undef WTERMSIG
66 #undef WSTOPSIG
67 #undef WIFSTOPPED
68 #undef WIFSIGNALED
69 #undef WIFEXITED
70 #endif /* HPUX | convex */
72 #ifndef WTERMSIG
73 #define WTERMSIG(w) w.w_termsig
74 #endif
75 #ifndef WSTOPSIG
76 #define WSTOPSIG(w) w.w_stopsig
77 #endif
78 #ifndef WIFSTOPPED
79 #define WIFSTOPPED(w) (WTERMSIG (w) == 0177)
80 #endif
81 #ifndef WIFSIGNALED
82 #define WIFSIGNALED(w) (WTERMSIG (w) != 0177 && (WSTOPSIG (w)) == 0)
83 #endif
84 #ifndef WIFEXITED
85 #define WIFEXITED(w) (WTERMSIG (w) == 0)
86 #endif
87 #endif /* BSD_SYSTEM || UNIPLUS || STRIDE || HPUX */
88 #endif /* not WAIT_USE_INT */
89 #endif /* no WAITTYPE */
91 #else /* VMS */
93 #define WAITTYPE int
94 #define WIFSTOPPED(w) 0
95 #define WIFSIGNALED(w) 0
96 #define WIFEXITED(w) ((w) != -1)
97 #define WRETCODE(w) (w)
98 #define WSTOPSIG(w) (w)
99 #define WCOREDUMP(w) 0
100 #define WTERMSIG(w) (w)
101 #include <ssdef.h>
102 #include <iodef.h>
103 #include <clidef.h>
104 #include "vmsproc.h"
106 #endif /* VMS */