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DEFINITIONS
This source file includes following definitions.
- wins_hook_action_string
- wins_hook
1 /*
2 Unix SMB/CIFS implementation.
3
4 wins hook feature, we run a specified script
5 which can then do some custom actions
6
7 Copyright (C) Stefan Metzmacher 2005
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
21 */
22
23 #include "includes.h"
24 #include "nbt_server/nbt_server.h"
25 #include "nbt_server/wins/winsdb.h"
26 #include "system/filesys.h"
27
28 static const char *wins_hook_action_string(enum wins_hook_action action)
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29 {
30 switch (action) {
31 case WINS_HOOK_ADD: return "add";
32 case WINS_HOOK_MODIFY: return "refresh";
33 case WINS_HOOK_DELETE: return "delete";
34 }
35
36 return "unknown";
37 }
38
39 void wins_hook(struct winsdb_handle *h, const struct winsdb_record *rec,
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40 enum wins_hook_action action, const char *wins_hook_script)
41 {
42 uint32_t i, length;
43 int child;
44 char *cmd = NULL;
45 TALLOC_CTX *tmp_mem = NULL;
46
47 if (!wins_hook_script || !wins_hook_script[0]) return;
48
49 tmp_mem = talloc_new(h);
50 if (!tmp_mem) goto failed;
51
52 length = winsdb_addr_list_length(rec->addresses);
53
54 if (action == WINS_HOOK_MODIFY && length < 1) {
55 action = WINS_HOOK_DELETE;
56 }
57
58 cmd = talloc_asprintf(tmp_mem,
59 "%s %s %s %02x %ld",
60 wins_hook_script,
61 wins_hook_action_string(action),
62 rec->name->name,
63 rec->name->type,
64 rec->expire_time);
65 if (!cmd) goto failed;
66
67 for (i=0; rec->addresses[i]; i++) {
68 cmd = talloc_asprintf_append_buffer(cmd, " %s", rec->addresses[i]->address);
69 if (!cmd) goto failed;
70 }
71
72 DEBUG(10,("call wins hook '%s'\n", cmd));
73
74 /* signal handling in posix really sucks - doing this in a library
75 affects the whole app, but what else to do?? */
76 signal(SIGCHLD, SIG_IGN);
77
78 child = fork();
79 if (child == (pid_t)-1) {
80 goto failed;
81 }
82
83 if (child == 0) {
84 /* TODO: close file handles */
85 execl("/bin/sh", "sh", "-c", cmd, NULL);
86 _exit(0);
87 }
88
89 talloc_free(tmp_mem);
90 return;
91 failed:
92 talloc_free(tmp_mem);
93 DEBUG(0,("FAILED: calling wins hook '%s'\n", wins_hook_script));
94 }