Replace "echo -e" with "printf" to have the same behavior in dash or bash

oe-core removed the prerequisite to have sh as bash. POSIX doesn't define
any options and furthermore allows 'echo -e' to be the default behavior.
This means that in dash 'echo -e' will actually print '-e' and interpret
backslashes by default. We use instead 'printf' builtin command with or
without '\n' to simulate 'echo -e' or 'echo -n'.
'printf' needs format while 'echo' can be used without any arguments. So
'echo >' was replaced by 'printf "" >'.
'echo' without '-n' flag adds a new line by default so to keep the same
behavior of two new lines while using 'echo "\n"', 'printf "\n\n"' is
used.

[YOCTO #3138]

(From OE-Core rev: a19880ad10ccb5d7d909dcf9de5c3dc58a0ebcd3)

Signed-off-by: Andrei Gherzan <andrei@gherzan.ro>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/scripts/contrib/ddimage b/scripts/contrib/ddimage
index 2cba9b28f1..956699c05d 100755
--- a/scripts/contrib/ddimage
+++ b/scripts/contrib/ddimage
@@ -75,7 +75,7 @@ fi
 image_details $IMAGE
 device_details $(basename $DEVICE)
 
-echo -n "Write $IMAGE to $DEVICE [y/N]? "
+printf "Write $IMAGE to $DEVICE [y/N]? "
 read RESPONSE
 if [ "$RESPONSE" != "y" ]; then
         echo "Write aborted"