Merge from trunk.
[emacs.git] / src / syswait.h
blob44a824abadb2c263997d3c4361ea043529e794f8
1 /* Define wait system call interface for Emacs.
2 Copyright (C) 1993-1995, 2000-2011 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 3 of the License, or
9 (at your option) 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. If not, see <http://www.gnu.org/licenses/>. */
19 /* Define the structure that the wait system call stores.
20 On many systems, there is a structure defined for this.
21 But on vanilla-ish USG systems there is not. */
23 #ifndef EMACS_SYSWAIT_H
24 #define EMACS_SYSWAIT_H
26 #include <sys/types.h>
28 #ifdef HAVE_SYS_WAIT_H /* We have sys/wait.h with POSIXoid definitions. */
29 #include <sys/wait.h>
30 #endif /* !HAVE_SYS_WAIT_H */
32 #ifndef WCOREDUMP /* not POSIX */
33 #define WCOREDUMP(status) ((status) & 0x80)
34 #endif
35 #ifndef WEXITSTATUS
36 #define WEXITSTATUS(status) (((status) & 0xff00) >> 8)
37 #endif
38 #ifndef WIFEXITED
39 #define WIFEXITED(status) (WTERMSIG(status) == 0)
40 #endif
41 #ifndef WIFSTOPPED
42 #define WIFSTOPPED(status) (((status) & 0xff) == 0x7f)
43 #endif
44 #ifndef WIFSIGNALED
45 #define WIFSIGNALED(status) (!WIFSTOPPED(status) && !WIFEXITED(status))
46 #endif
47 #ifndef WSTOPSIG
48 #define WSTOPSIG(status) WEXITSTATUS(status)
49 #endif
50 #ifndef WTERMSIG
51 #define WTERMSIG(status) ((status) & 0x7f)
52 #endif
54 #undef WRETCODE
55 #define WRETCODE(status) WEXITSTATUS (status)
58 #endif /* EMACS_SYSWAIT_H */