doveadm stats top: Don't hang if stats server doesn't send any statistics.

diff --git a/src/doveadm/doveadm-stats.c b/src/doveadm/doveadm-stats.c
index e5017ae048ec0cefc0f14a69ad8a301689c5c4b2..24aa95ab7733c0cf7744b62d929c445f7e699c74 100644 (file)
--- a/src/doveadm/doveadm-stats.c
+++ b/src/doveadm/doveadm-stats.c
@@ -46,21 +46,25 @@ static void stats_lookup(const char *path)
        args = read_next_line(input);
        if (args == NULL)
                i_fatal("read(%s) unexpectedly disconnected", path);
-       for (; *args != NULL; args++)
-               doveadm_print_header_simple(*args);
+       if (*args == NULL)
+               i_info("no statistics available");
+       else {
+               for (; *args != NULL; args++)
+                       doveadm_print_header_simple(*args);
 
-       /* read lines */
-       do {
-               T_BEGIN {
-                       args = read_next_line(input);
-                       if (args[0] == NULL)
-                               args = NULL;
-                       if (args != NULL) {
-                               for (i = 0; args[i] != NULL; i++)
-                                       doveadm_print(args[i]);
-                       }
-               } T_END;
-       } while (args != NULL);
+               /* read lines */
+               do {
+                       T_BEGIN {
+                               args = read_next_line(input);
+                               if (args[0] == NULL)
+                                       args = NULL;
+                               if (args != NULL) {
+                                       for (i = 0; args[i] != NULL; i++)
+                                               doveadm_print(args[i]);
+                               }
+                       } T_END;
+               } while (args != NULL);
+       }
        if (input->stream_errno != 0)
                i_fatal("read(%s) failed: %m", path);
        i_stream_destroy(&input);