1 /* Define wait system call interface for Emacs.
2 Copyright (C) 1993-1995, 2000-2023 Free Software Foundation, Inc.
3
4 This file is part of GNU Emacs.
5
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 (at
9 your option) any later version.
10
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.
15
16 You should have received a copy of the GNU General Public License
17 along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */
18
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. */
22
23 #ifndef EMACS_SYSWAIT_H
24 #define EMACS_SYSWAIT_H
25
26 #include <sys/types.h>
27
28 #ifdef HAVE_SYS_WAIT_H /* We have sys/wait.h with POSIXish definitions. */
29 #include <sys/wait.h>
30 #endif /* !HAVE_SYS_WAIT_H */
31
32 #ifndef WCONTINUED
33 #define WCONTINUED 8
34 #endif
35
36 #ifndef WCOREDUMP /* not POSIX */
37 #define WCOREDUMP(status) ((status) & 0x80)
38 #endif
39 #ifndef WEXITSTATUS
40 #define WEXITSTATUS(status) (((status) & 0xff00) >> 8)
41 #endif
42 #ifndef WIFEXITED
43 #define WIFEXITED(status) (WTERMSIG(status) == 0)
44 #endif
45 #ifndef WIFSTOPPED
46 #define WIFSTOPPED(status) (((status) & 0xff) == 0x7f)
47 #endif
48 #ifndef WIFSIGNALED
49 #define WIFSIGNALED(status) (!WIFSTOPPED(status) && !WIFEXITED(status))
50 #endif
51 #ifndef WSTOPSIG
52 #define WSTOPSIG(status) WEXITSTATUS(status)
53 #endif
54 #ifndef WTERMSIG
55 #define WTERMSIG(status) ((status) & 0x7f)
56 #endif
57
58 /* Defined in sysdep.c. */
59 extern bool wait_for_termination (pid_t, int *, bool);
60 extern pid_t child_status_changed (pid_t, int *, int);
61
62 #endif /* EMACS_SYSWAIT_H */