Commit | Line | Data |
---|---|---|
95ed0025 RS |
1 | /* Utility and Unix shadow routines for GNU Emacs support programs on NT. |
2 | Copyright (C) 1994 Free Software Foundation, Inc. | |
3 | ||
3b7ad313 EN |
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 2, or (at your option) | |
9 | 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; 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. | |
95ed0025 RS |
20 | |
21 | Geoff Voelker (voelker@cs.washington.edu) 10-8-94 | |
22 | */ | |
23 | ||
24 | #include <windows.h> | |
25 | #include <stdlib.h> | |
26 | #include <stdio.h> | |
27 | ||
28 | #define MAXPATHLEN _MAX_PATH | |
29 | ||
30 | /* Emulate sleep...we could have done this with a define, but that | |
31 | would necessitate including windows.h in the files that used it. | |
32 | This is much easier. */ | |
33 | void | |
34 | nt_sleep(int seconds) | |
35 | { | |
36 | Sleep (seconds * 1000); | |
37 | } | |
38 | ||
39 | /* Get the current working directory. */ | |
40 | int | |
41 | getwd (char *dir) | |
42 | { | |
43 | return GetCurrentDirectory (MAXPATHLEN, dir); | |
44 | } | |
45 | ||
46 | static HANDLE getppid_parent; | |
47 | static int getppid_ppid; | |
48 | ||
49 | int | |
50 | getppid(void) | |
51 | { | |
52 | char *ppid; | |
53 | DWORD result; | |
54 | ||
55 | ppid = getenv ("__PARENT_PROCESS_ID"); | |
56 | if (!ppid) | |
57 | { | |
58 | printf("no pid.\n"); | |
59 | return 0; | |
60 | } | |
61 | else | |
62 | { | |
63 | getppid_ppid = atoi (ppid); | |
64 | } | |
65 | ||
66 | if (!getppid_parent) | |
67 | { | |
68 | getppid_parent = OpenProcess (SYNCHRONIZE, FALSE, atoi(ppid)); | |
69 | if (!getppid_parent) | |
70 | { | |
71 | printf ("Failed to open handle to parent process: %d\n", | |
72 | GetLastError()); | |
73 | exit (1); | |
74 | } | |
75 | } | |
76 | ||
77 | result = WaitForSingleObject (getppid_parent, 0); | |
78 | switch (result) | |
79 | { | |
80 | case WAIT_TIMEOUT: | |
81 | /* The parent is still alive. */ | |
82 | return getppid_ppid; | |
83 | case WAIT_OBJECT_0: | |
84 | /* The parent is gone. Return the pid of Unix init (1). */ | |
85 | return 1; | |
86 | case WAIT_FAILED: | |
87 | default: | |
88 | printf ("Checking parent status failed: %d\n", GetLastError()); | |
89 | exit (1); | |
90 | } | |
91 | } |