[OE-core] [PATCH] mkefidisk.sh: Allow using a loopback mounted file

[Jason Wessel]

There is no reason not allow writing of direct boot disk images for
testing with simulators.  The easy way is to add loop back writing
capabilities.

Example:
  qemu-img create -f raw bigdisk 4G
  dev=`sudo losetup -f`
  sudo losetup $dev bigdisk
  mkefidisk.sh $dev tmp-eglibc/deploy/images/qemux86/core-image-minimal-qemux86.hddimg /dev/sda
  sudo losetup -d $dev

Signed-off-by: Jason Wessel <jason.wessel at windriver.com>
---
 scripts/contrib/mkefidisk.sh |    9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/scripts/contrib/mkefidisk.sh b/scripts/contrib/mkefidisk.sh
index af06b4b..224a146 100755
--- a/scripts/contrib/mkefidisk.sh
+++ b/scripts/contrib/mkefidisk.sh
@@ -142,7 +142,7 @@ SWAP_START=$((ROOTFS_END))
 
 # MMC devices use a partition prefix character 'p'
 PART_PREFIX=""
-if [ ! "${DEVICE#/dev/mmcblk}" = "${DEVICE}" ]; then
+if [ ! "${DEVICE#/dev/mmcblk}" = "${DEVICE}" ] || [ ! "${TARGET_DEVICE#/dev/loop}" = "${DEVICE}" ]; then
 	PART_PREFIX="p"
 fi
 BOOTFS=$DEVICE${PART_PREFIX}1
@@ -197,7 +197,12 @@ unmount_device
 #
 echo ""
 echo "Formatting $BOOTFS as vfat..."
-mkfs.vfat $BOOTFS -n "efi"
+if [ ! "${DEVICE#/dev/loop}" = "${DEVICE}" ]; then
+	mkfs.vfat -I $BOOTFS -n "efi"
+else
+	mkfs.vfat $BOOTFS -n "efi"
+
+fi
 
 echo "Formatting $ROOTFS as ext3..."
 mkfs.ext3 $ROOTFS -L "root"
-- 
1.7.9.5