tools: clarify PermissionError in measure-trackpoint-range

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net> (cherry picked from commit ac1d508)
gitclear · Dec 14, 2017 · 5cf08e8 · 5cf08e8
1 parent c863ab5
commit 5cf08e8
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/tools/libinput-measure-trackpoint-range b/tools/libinput-measure-trackpoint-range
@@ -189,7 +189,7 @@ def main(args):
     except KeyboardInterrupt:
         device.print_summary()
     except (PermissionError, OSError):
-        print("Error: failed to open device")
+        print("Error: failed to open device. Are you running as root?")
     except InvalidDeviceError as e:
         print("Error: {}".format(e))