1 files changed, 94 insertions, 0 deletions
diff --git a/source4/nbt_server/wins/wins_hook.c b/source4/nbt_server/wins/wins_hook.c
new file mode 100644
index 0000000..1af471b
--- /dev/null
+++ b/source4/nbt_server/wins/wins_hook.c
@@ -0,0 +1,94 @@
+/* 
+   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));
+}