cli: get AT command timeout directly from our default operation timeout

We remove the `--command-timeout' option, as the AT command timeout is now
directly computed from our default DBus timeout (modifiable with `--timeout').

cli/mmcli-modem.c

@@ -51,7 +51,6 @@ static gboolean disable_flag;
 static gboolean reset_flag;
 static gchar *factory_reset_str;
 static gchar *command_str;
-static gint command_timeout;
 static gboolean list_bearers_flag;
 static gchar *create_bearer_str;
 static gchar *delete_bearer_str;
@@ -84,10 +83,6 @@ static GOptionEntry entries[] = {
       "Send an AT command to the modem",
       "[COMMAND]"
     },
-    { "command-timeout", 0, 0, G_OPTION_ARG_INT, &command_timeout,
-      "Timeout for AT command",
-      "[SECONDS]"
-    },
     { "list-bearers", 0, 0, G_OPTION_ARG_NONE, &list_bearers_flag,
       "List packet data bearers available in a given modem",
       NULL
@@ -554,6 +549,21 @@ command_ready (MMModem      *modem,
     mmcli_async_operation_done ();
 }
 
+static guint
+command_get_timeout (MMModem *modem)
+{
+    gint timeout;
+
+    /* If --timeout was given, it should already have been set in the proxy */
+    timeout = (g_dbus_proxy_get_default_timeout (G_DBUS_PROXY (modem)) / 1000) - 1;
+    if (timeout <= 0) {
+        g_printerr ("error: timeout is too short (%d)\n", timeout);
+        exit (EXIT_FAILURE);
+    }
+
+    return (guint)timeout;
+}
+
 static void
 list_bearers_process_reply (GList        *result,
                             const GError *error)
@@ -847,10 +857,16 @@ get_modem_ready (GObject      *source,
 
     /* Request to send a command to the modem? */
     if (command_str) {
-        g_debug ("Asynchronously sending a command to the modem...");
+        guint timeout;
+
+        timeout = command_get_timeout (ctx->modem);
+
+        g_debug ("Asynchronously sending a command to the modem (%u seconds timeout)...",
+                 timeout);
+
         mm_modem_command (ctx->modem,
                           command_str,
-                          command_timeout ? command_timeout : 30,
+                          timeout,
                           ctx->cancellable,
                           (GAsyncReadyCallback)command_ready,
                           NULL);
@@ -1028,11 +1044,16 @@ mmcli_modem_run_synchronous (GDBusConnection *connection)
     /* Request to send a command to the modem? */
     if (command_str) {
         gchar *result;
+        guint timeout;
+
+        timeout = command_get_timeout (ctx->modem);
+
+        g_debug ("Synchronously sending command to modem (%u seconds timeout)...",
+                 timeout);
 
-        g_debug ("Synchronously sending command to modem...");
         result = mm_modem_command_sync (ctx->modem,
                                         command_str,
-                                        command_timeout ? command_timeout : 30,
+                                        timeout,
                                         NULL,
                                         &error);
         command_process_reply (result, error);