s3:registry: rename reg_util.{c,h} to reg_util_internal.{c,h}
[amitay/samba.git] / source3 / registry / reg_backend_current_version.c
1 /*
2  *  Unix SMB/CIFS implementation.
3  *  Virtual Windows Registry Layer
4  *  Copyright (C) Gerald Carter     2002-2005
5  *  Copyright (C) Michael Adam      2008
6  *
7  *  This program is free software; you can redistribute it and/or modify
8  *  it under the terms of the GNU General Public License as published by
9  *  the Free Software Foundation; either version 3 of the License, or
10  *  (at your option) any later version.
11  *
12  *  This program is distributed in the hope that it will be useful,
13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  *  GNU General Public License for more details.
16  *
17  *  You should have received a copy of the GNU General Public License
18  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
19  */
20
21 /*
22  * CurrentVersion registry backend.
23  *
24  * This is a virtual overlay, dynamically presenting version information.
25  */
26
27 #include "includes.h"
28 #include "registry.h"
29 #include "reg_util_internal.h"
30
31 #undef DBGC_CLASS
32 #define DBGC_CLASS DBGC_REGISTRY
33
34 extern struct registry_ops regdb_ops;
35
36 #define KEY_CURRENT_VERSION_NORM "HKLM/SOFTWARE/MICROSOFT/WINDOWS NT/CURRENTVERSION"
37
38 static int current_version_fetch_values(const char *key, struct regval_ctr *values)
39 {
40         const char *sysroot_string = "c:\\Windows";
41         fstring sysversion;
42         char *path = NULL;
43         TALLOC_CTX *ctx = talloc_tos();
44
45         path = talloc_strdup(ctx, key);
46         if (path == NULL) {
47                 return -1;
48         }
49         path = normalize_reg_path(ctx, path);
50         if (path == NULL) {
51                 return -1;
52         }
53
54         if (strncmp(path, KEY_CURRENT_VERSION_NORM, strlen(path)) != 0) {
55                 return regdb_ops.fetch_values(key, values);
56         }
57
58         regval_ctr_addvalue_sz(values, "SystemRoot", sysroot_string);
59
60         fstr_sprintf(sysversion, "%d.%d", lp_major_announce_version(),
61                      lp_minor_announce_version());
62
63         regval_ctr_addvalue_sz(values, "CurrentVersion", sysversion);
64
65         return regval_ctr_numvals(values);
66 }
67
68 static int current_version_fetch_subkeys(const char *key,
69                                          struct regsubkey_ctr *subkey_ctr)
70 {
71         return regdb_ops.fetch_subkeys(key, subkey_ctr);
72 }
73
74 struct registry_ops current_version_reg_ops = {
75         .fetch_values = current_version_fetch_values,
76         .fetch_subkeys = current_version_fetch_subkeys,
77 };