From 3add3c0e19b659427a2624ec85daf67019b8ed7f Mon Sep 17 00:00:00 2001
From: Stef Walter <stef@memberwebs.com>
Date: Mon, 9 Jun 2008 15:44:02 +0000
Subject: Lots of bug fixes, changes.

---
 plugin/Makefile.am       |  2 +-
 plugin/slapi-dnsnotify.c | 76 ++++++++++++++++++++++++++++++++++++------------
 2 files changed, 58 insertions(+), 20 deletions(-)

(limited to 'plugin')

diff --git a/plugin/Makefile.am b/plugin/Makefile.am
index d1887a3..9b8f4de 100644
--- a/plugin/Makefile.am
+++ b/plugin/Makefile.am
@@ -2,7 +2,7 @@
 INCLUDES = \
 	-I$(top_srcdir) \
 	-DSTRSET_CUSTMEM=1 \
-	-DDNS_NOTIFY_PATH=\"$(bindir)/notify-slaves\"
+	-DDNS_NOTIFY_PATH=\"$(bindir)/notify-dns-slaves\"
 
 lib_LTLIBRARIES = slapi-dnsnotify.la
 
diff --git a/plugin/slapi-dnsnotify.c b/plugin/slapi-dnsnotify.c
index b871c86..329b913 100644
--- a/plugin/slapi-dnsnotify.c
+++ b/plugin/slapi-dnsnotify.c
@@ -190,13 +190,32 @@ load_soa_ns_attributes (const char *dn, char **soa_result, char ***ns_result)
 	return 0;
 }
 
+static void
+kill_notify_process (void)
+{
+	int status;
+
+	if (dnsnotify_pipe != -1)
+		close (dnsnotify_pipe);
+	dnsnotify_pipe = -1;
+
+	if (dnsnotify_pid != -1) {
+		if (waitpid (dnsnotify_pid, &status, WNOHANG) == 0) {
+			/* We can play rough, because we know process can take it */
+			if (kill (dnsnotify_pid, SIGKILL) >= 0)
+				waitpid (dnsnotify_pid, &status, 0);
+		}
+		dnsnotify_pid = -1;
+	}
+}
+
 static int
 fork_notify_process (void)
 {
-	pid_t pid;
-	int status;
+	int open_max, fd;
 	int commpipe[2];
 	char *args[3];
+	pid_t pid;
 
 	if (pipe (commpipe) < 0) {
 		log_plugin ("couldn't create communication pipe for child process: %s", strerror (errno));
@@ -221,18 +240,11 @@ fork_notify_process (void)
 		/* close read end */
 		close (commpipe[0]);
 
-		/* hang onto write end */
-		if (dnsnotify_pipe != -1)
-			close (dnsnotify_pipe);
-		dnsnotify_pipe = commpipe[1];
+		/* Kill any previous process */
+		kill_notify_process ();
 
-		if (dnsnotify_pid != -1) {
-			if (waitpid (dnsnotify_pid, &status, WNOHANG) == 0) {
-				/* We can play rough, because we know process can take it */
-				if (kill (dnsnotify_pid, SIGKILL) >= 0)
-					waitpid (dnsnotify_pid, &status, 0);
-			}
-		}
+		/* hang onto write end, and new pid */
+		dnsnotify_pipe = commpipe[1];
 		dnsnotify_pid = pid;
 
 		return 0;
@@ -245,6 +257,11 @@ fork_notify_process (void)
 	if (dup2 (commpipe[0], 0) < 0)
 		log_plugin ("couldn't setup stdin on notify child process: %s", strerror (errno));
 
+	/* Close all other file descriptors */
+	open_max = sysconf (_SC_OPEN_MAX);
+	for (fd = 3; fd < open_max; ++fd)
+		close (fd);
+
 	args[0] = DNS_NOTIFY_PATH;
 	args[1] = "-s";
 	args[2] = NULL;
@@ -285,7 +302,7 @@ prep_soa_domain (char *soa)
 	/* Find the first space in the SOA and cut it off there */
 	while (soa[0] && isspace (soa[0]))
 		++soa;
-	at = strspn (soa, " \t\n\r\v");
+	at = strcspn (soa, " \t\n\r\v");
 	if (at == 0) {
 		log_plugin ("invalid SOA present");
 		return NULL;
@@ -334,11 +351,11 @@ notify_dns_slaves (char *soa, char **ns)
 				if (!n[0])
 					continue;
 
-				if (write_all (dnsnotify_pipe, "NOTIFY: ", 5) < 0 ||
+				if (write_all (dnsnotify_pipe, "NOTIFY: ", 8) < 0 ||
 				    write_all (dnsnotify_pipe, soa, strlen (soa)) < 0 ||
 				    write_all (dnsnotify_pipe, " ", 1) < 0 ||
-				    write_all (dnsnotify_pipe, *ns, strlen (soa)) < 0 ||
-				    write_all (dnsnotify_pipe, "\n", 2) < 0) {
+				    write_all (dnsnotify_pipe, *ns, strlen (*ns)) < 0 ||
+				    write_all (dnsnotify_pipe, "\n", 1) < 0) {
 					if (errno == EPIPE) {
 						complete = 0;
 						break;
@@ -363,6 +380,8 @@ slapi_dnsnotify_modify (Slapi_PBlock *pb)
 
 	return_val_if_fail (pb, -1);
 
+	trace ("detect modify");
+
 	/* Make sure it was successful, don't process errors */
 	rc = slapi_pblock_get (pb, SLAPI_RESULT_CODE, &code);
 	return_val_if_fail (rc >= 0, -1);
@@ -380,6 +399,7 @@ slapi_dnsnotify_modify (Slapi_PBlock *pb)
 
 	for (m = mods; *m; ++m) {
 		mod = *m;
+		trace (mod->mod_type);
 		if (strcmp (mod->mod_type, dnsnotify_soa_attribute) == 0) {
 			if (load_soa_ns_attributes (dn, &soa, &ns)) {
 				notify_dns_slaves (soa, ns);
@@ -432,8 +452,25 @@ static Slapi_PluginDesc plugin_description = {
 	"Notify's DNS slaves when SOA change is made"             /* plug-in description */
 };
 
+static int
+plugin_destroy (Slapi_PBlock *pb)
+{
+	if (dnsnotify_mutex)
+		slapi_lock_mutex (dnsnotify_mutex);
+
+	kill_notify_process ();
+
+	if (dnsnotify_mutex) {
+		slapi_unlock_mutex (dnsnotify_mutex);
+		slapi_destroy_mutex (dnsnotify_mutex);
+		dnsnotify_mutex = NULL;
+	}
+
+	return 0;
+}
+
 int
-plugin_init (Slapi_PBlock* pb)
+plugin_init (Slapi_PBlock *pb)
 {
 	char **argv = NULL;
 	int argc = 0;
@@ -464,7 +501,8 @@ plugin_init (Slapi_PBlock* pb)
 	}
 
 	if (slapi_pblock_set (pb, SLAPI_PLUGIN_VERSION, SLAPI_PLUGIN_VERSION_03) != 0 ||
-	    slapi_pblock_set (pb, SLAPI_PLUGIN_DESCRIPTION, &plugin_description) != 0) {
+	    slapi_pblock_set (pb, SLAPI_PLUGIN_DESCRIPTION, &plugin_description) != 0 ||
+	    slapi_pblock_set (pb, SLAPI_PLUGIN_DESTROY_FN, plugin_destroy)) {
 		log_plugin ("error registring plugin");
 		return -1;
 	}
-- 
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