master: make setting listen empty an error

diff --git a/src/master/master-settings.c b/src/master/master-settings.c
index 47817c174870c4821fb9d173f8320e4186403a1f..36ca8a83b06ca950e0d87142e023f0f5b082de80 100644 (file)
--- a/src/master/master-settings.c
+++ b/src/master/master-settings.c
@@ -432,6 +432,11 @@ master_settings_verify(void *_set, pool_t pool, const char **error_r)
        unsigned int max_client_limit = set->default_client_limit;
 #endif
 
+       if (*set->listen == '\0') {
+               *error_r = "listen can't be set empty";
+               return FALSE;
+       }
+
        len = strlen(set->base_dir);
        if (len > 0 && set->base_dir[len-1] == '/') {
                /* drop trailing '/' */