mkefidisk.sh: be more explicit with device error

* Specify whether the device can't be found or can't be written to
* Give a hint to use sudo

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/scripts/contrib/mkefidisk.sh b/scripts/contrib/mkefidisk.sh
index d6bc965137f507b4d45b4456520642c89416db73..55f72b0f5422c5e2a1e40d6655a372a0fcf38afb 100755 (executable)
--- a/scripts/contrib/mkefidisk.sh
+++ b/scripts/contrib/mkefidisk.sh
@@ -173,7 +173,11 @@ fi
 
 if [ ! -w "$DEVICE" ]; then
        usage
-       die "Device $DEVICE does not exist or is not writable"
+       if [ ! -e "${DEVICE}" ] ; then
+               die "Device $DEVICE cannot be found"
+       else
+               die "Device $DEVICE is not writable (need to run under sudo?)"
+       fi
 fi
 
 if [ ! -e "$HDDIMG" ]; then