scripts/contrib/ddimage: be explicit whether device doesn't exist or isn't writeable

Make the error messages a little more friendly.

(From OE-Core rev: 36f308b0134c69b439152c2473a274d96b0fee89)

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

1 files changed, 7 insertions, 2 deletions

diff --git a/scripts/contrib/ddimage b/scripts/contrib/ddimage
index a7dc5f7487..7f2ad112a6 100755
--- a/scripts/contrib/ddimage
+++ b/scripts/contrib/ddimage
@@ -122,6 +122,12 @@ if [ ! -e "$IMAGE" ]; then
         exit 1
 fi
 
+if [ ! -e "$DEVICE" ]; then
+        echo "ERROR: Device $DEVICE does not exist"
+        usage
+        exit 1
+fi
+
 if [ "$(uname)" = "Darwin" ]; then
         # readlink doesn't support -f on MacOS, just assume it isn't a symlink
         ACTUAL_DEVICE=$DEVICE
@@ -139,9 +145,8 @@ if is_inuse $ACTUAL_DEVICE ; then
         exit 1
 fi
 
-
 if [ ! -w "$DEVICE" ]; then
-        echo "ERROR: Device $DEVICE does not exist or is not writable"
+        echo "ERROR: Device $DEVICE is not writable - possibly use sudo?"
         usage
         exit 1
 fi