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/*
Unix SMB/CIFS implementation.
wins hook feature, we run a specified script
which can then do some custom actions
Copyright (C) Stefan Metzmacher 2005
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "nbt_server/nbt_server.h"
#include "nbt_server/wins/winsdb.h"
#include "system/filesys.h"
static const char *wins_hook_action_string(enum wins_hook_action action)
{
switch (action) {
case WINS_HOOK_ADD: return "add";
case WINS_HOOK_MODIFY: return "refresh";
case WINS_HOOK_DELETE: return "delete";
}
return "unknown";
}
void wins_hook(struct winsdb_handle *h, const struct winsdb_record *rec,
enum wins_hook_action action, const char *wins_hook_script)
{
uint32_t i, length;
int child;
char *cmd = NULL;
TALLOC_CTX *tmp_mem = NULL;
if (!wins_hook_script || !wins_hook_script[0]) return;
tmp_mem = talloc_new(h);
if (!tmp_mem) goto failed;
length = winsdb_addr_list_length(rec->addresses);
if (action == WINS_HOOK_MODIFY && length < 1) {
action = WINS_HOOK_DELETE;
}
cmd = talloc_asprintf(tmp_mem,
"%s %s %s %02x %ld",
wins_hook_script,
wins_hook_action_string(action),
rec->name->name,
rec->name->type,
(long int) rec->expire_time);
if (!cmd) goto failed;
for (i=0; rec->addresses[i]; i++) {
cmd = talloc_asprintf_append_buffer(cmd, " %s", rec->addresses[i]->address);
if (!cmd) goto failed;
}
DEBUG(10,("call wins hook '%s'\n", cmd));
/* signal handling in posix really sucks - doing this in a library
affects the whole app, but what else to do?? */
signal(SIGCHLD, SIG_IGN);
child = fork();
if (child == (pid_t)-1) {
goto failed;
}
if (child == 0) {
/* TODO: close file handles */
execl("/bin/sh", "sh", "-c", cmd, NULL);
_exit(0);
}
talloc_free(tmp_mem);
return;
failed:
talloc_free(tmp_mem);
DEBUG(0,("FAILED: calling wins hook '%s'\n", wins_hook_script));
}
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