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1 | /* Utility and Unix shadow routines for GNU Emacs support programs on NT. |
2 | Copyright (C) 1994 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 it | |
7 | under the terms of the GNU General Public License as published by the | |
8 | Free Software Foundation; either version 2, or (at your option) any later | |
9 | version. | |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, but WITHOUT | |
12 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
14 | more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License along | |
17 | with GNU Emacs; see the file COPYING. If not, write to the Free Software | |
18 | Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | ||
20 | Geoff Voelker (voelker@cs.washington.edu) 10-8-94 | |
21 | */ | |
22 | ||
23 | #include <windows.h> | |
24 | #include <stdlib.h> | |
25 | #include <stdio.h> | |
26 | ||
27 | #define MAXPATHLEN _MAX_PATH | |
28 | ||
29 | /* Emulate sleep...we could have done this with a define, but that | |
30 | would necessitate including windows.h in the files that used it. | |
31 | This is much easier. */ | |
32 | void | |
33 | nt_sleep(int seconds) | |
34 | { | |
35 | Sleep (seconds * 1000); | |
36 | } | |
37 | ||
38 | /* Get the current working directory. */ | |
39 | int | |
40 | getwd (char *dir) | |
41 | { | |
42 | return GetCurrentDirectory (MAXPATHLEN, dir); | |
43 | } | |
44 | ||
45 | static HANDLE getppid_parent; | |
46 | static int getppid_ppid; | |
47 | ||
48 | int | |
49 | getppid(void) | |
50 | { | |
51 | char *ppid; | |
52 | DWORD result; | |
53 | ||
54 | ppid = getenv ("__PARENT_PROCESS_ID"); | |
55 | if (!ppid) | |
56 | { | |
57 | printf("no pid.\n"); | |
58 | return 0; | |
59 | } | |
60 | else | |
61 | { | |
62 | getppid_ppid = atoi (ppid); | |
63 | } | |
64 | ||
65 | if (!getppid_parent) | |
66 | { | |
67 | getppid_parent = OpenProcess (SYNCHRONIZE, FALSE, atoi(ppid)); | |
68 | if (!getppid_parent) | |
69 | { | |
70 | printf ("Failed to open handle to parent process: %d\n", | |
71 | GetLastError()); | |
72 | exit (1); | |
73 | } | |
74 | } | |
75 | ||
76 | result = WaitForSingleObject (getppid_parent, 0); | |
77 | switch (result) | |
78 | { | |
79 | case WAIT_TIMEOUT: | |
80 | /* The parent is still alive. */ | |
81 | return getppid_ppid; | |
82 | case WAIT_OBJECT_0: | |
83 | /* The parent is gone. Return the pid of Unix init (1). */ | |
84 | return 1; | |
85 | case WAIT_FAILED: | |
86 | default: | |
87 | printf ("Checking parent status failed: %d\n", GetLastError()); | |
88 | exit (1); | |
89 | } | |
90 | } |