email plugin: Shutdown cleanly.

Using a shutdown function the email plugin closes any sockets, terminates all
running threads and removes the UNIX socket.

Signed-off-by: Sebastian Harl <sh@tokkee.org>

diff --git a/src/email.c b/src/email.c
index b799597..80cb4bd 100644 (file)
--- a/src/email.c
+++ b/src/email.c
@@ -135,6 +135,7 @@ static int disabled = 0;
 
 /* thread managing "client" connections */
 static pthread_t connector;
+static int connector_socket;
 
 /* tell the connector thread that a collector is available */
 static pthread_cond_t collector_available = PTHREAD_COND_INITIALIZER;
@@ -524,13 +525,11 @@ static void *collect (void *arg)
 
 static void *open_connection (void *arg)
 {
-       int local = 0;
-
        struct sockaddr_un addr;
 
        /* create UNIX socket */
        errno = 0;
-       if (-1 == (local = socket (PF_UNIX, SOCK_STREAM, 0))) {
+       if (-1 == (connector_socket = socket (PF_UNIX, SOCK_STREAM, 0))) {
                disabled = 1;
                syslog (LOG_ERR, "socket() failed: %s", strerror (errno));
                pthread_exit ((void *)1);
@@ -543,7 +542,7 @@ static void *open_connection (void *arg)
        unlink (addr.sun_path);
 
        errno = 0;
-       if (-1 == bind (local, (struct sockaddr *)&addr,
+       if (-1 == bind (connector_socket, (struct sockaddr *)&addr,
                                offsetof (struct sockaddr_un, sun_path)
                                        + strlen(addr.sun_path))) {
                disabled = 1;
@@ -552,7 +551,7 @@ static void *open_connection (void *arg)
        }
 
        errno = 0;
-       if (-1 == listen (local, 5)) {
+       if (-1 == listen (connector_socket, 5)) {
                disabled = 1;
                syslog (LOG_ERR, "listen() failed: %s", strerror (errno));
                pthread_exit ((void *)1);
@@ -619,7 +618,7 @@ static void *open_connection (void *arg)
 
                do {
                        errno = 0;
-                       if (-1 == (remote = accept (local, NULL, NULL))) {
+                       if (-1 == (remote = accept (connector_socket, NULL, NULL))) {
                                if (EINTR != errno) {
                                        disabled = 1;
                                        syslog (LOG_ERR, "accept() failed: %s", strerror (errno));
@@ -704,6 +703,31 @@ static void email_init (void)
        return;
 } /* static void email_init (void) */
 
+#if EMAIL_HAVE_READ
+static void email_shutdown (void)
+{
+       collector_t *ptr;
+
+       if (disabled)
+               return;
+
+       close (connector_socket);
+       pthread_kill (connector, SIGTERM);
+
+       pthread_mutex_lock (&active_mutex);
+
+       for (ptr = active.head; NULL != ptr; ptr = ptr->next) {
+               close (ptr->socket);
+               pthread_kill (ptr->thread, SIGTERM);
+       }
+
+       pthread_mutex_unlock (&active_mutex);
+
+       unlink (SOCK_PATH);
+       return;
+} /* static void email_shutdown (void) */
+#endif /* EMAIL_HAVE_READ */
+
 static void count_write (char *host, char *inst, char *val)
 {
        char file[BUFSIZE] = "";
@@ -837,6 +861,7 @@ void module_register (void)
        plugin_register ("email_spam_score", NULL, NULL, score_write);
        plugin_register ("email_spam_check", NULL, NULL, check_write);
 #if EMAIL_HAVE_READ
+       plugin_register_shutdown (MODULE_NAME, email_shutdown);
        cf_register (MODULE_NAME, email_config, config_keys, config_keys_num);
 #endif /* EMAIL_HAVE_READ */
        return;