[PATCH BlueZ] client: Avoid scan prompt when discovery is already active

Check the adapter's Discovering property before prompting the user
to start scanning. This avoids prompting to scan when discovery is
already in progress, which previously resulted
in an org.bluez.Error.InProgress error.
---
 client/main.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/client/main.c b/client/main.c
index b5cad8afc..b8087c449 100644
--- a/client/main.c
+++ b/client/main.c
@@ -2297,8 +2297,20 @@ static void cmd_connect(int argc, char *argv[])
 	proxy = find_proxy_by_address(default_ctrl->devices, argv[1]);
 	if (!proxy) {
 		bt_shell_printf("Device %s not available\n", argv[1]);
-		bt_shell_prompt_input(argv[1], "Scan and connect (yes,no):",
-				      prompt_scan_connect, strdup(argv[1]));
+		dbus_bool_t discovering;
+		DBusMessageIter iter;
+
+		if (g_dbus_proxy_get_property(default_ctrl->proxy,
+					"Discovering", &iter)) {
+			dbus_message_iter_get_basic(&iter, &discovering);
+
+			if (!discovering)
+				bt_shell_prompt_input(argv[1],
+					"Scan and connect (yes,no):",
+					prompt_scan_connect,
+					strdup(argv[1]));
+
+		}
 		return;
 	}
 
-- 
2.55.0