Parse sub-second intervals on command-line.

babel.c

@@ -161,16 +161,24 @@ main(int argc, char **argv)
             }
         } else if(strcmp(*arg, "-h") == 0) {
             SHIFTE();
-            wireless_hello_interval = atoi(*arg) * 1000;
+            wireless_hello_interval = parse_msec(*arg);
+            if(wireless_hello_interval <= 0)
+                goto syntax;
         } else if(strcmp(*arg, "-H") == 0) {
             SHIFTE();
-            wired_hello_interval = atoi(*arg) * 1000;
+            wired_hello_interval = parse_msec(*arg);
+            if(wired_hello_interval <= 0)
+                goto syntax;
         } else if(strcmp(*arg, "-i") == 0) {
             SHIFTE();
-            idle_hello_interval = atoi(*arg) * 1000;
+            idle_hello_interval = parse_msec(*arg);
+            if(idle_hello_interval <= 0)
+                goto syntax;
         } else if(strcmp(*arg, "-u") == 0) {
             SHIFTE();
-            update_interval = atoi(*arg) * 1000;
+            update_interval = parse_msec(*arg);
+            if(update_interval <= 0)
+                goto syntax;
         } else if(strcmp(*arg, "-k") == 0) {
             SHIFTE();
             kernel_metric = atoi(*arg);