From 87e581bb7da9f1530d190cd023fcf892c8b858f5 Mon Sep 17 00:00:00 2001 From: Darren Hart Date: Tue, 13 Mar 2012 12:02:51 -0700 Subject: ddimage: Add script for writing images to boot media Fixes [YOCTO #1806] Standard practice is to use the Linux "dd" command to write images to boot media. This can be error prone and the results of sloppy usage can be disastrous. Locating the device you want to use is a clumsy process, especially on a headless build system. The ddimage script does the following: o Check the image and device exist o Check the device is writable o Compare the device to a blacklist and abort if it's listed Blacklist defaults to "/dev/sda" o Display useful identifying information about the image and device o Prompt the user before commencing the write The output looks something like this: $ sudo ~/bin/ddimage tmp/deploy/images/core-image-sato-fri2-noemgd.hddimg /dev/sdk Image details ============= image: `tmp/deploy/images/core-image-sato-fri2-noemgd.hddimg' -> `core-image-sato-fri2-noemgd-20111202214038.hddimg' size: 318568448 bytes modified: 2011-12-02 13:45:05.298897861 -0800 type: x86 boot sector, code offset 0x58, OEM-ID "SYSLINUX", sectors/cluster 16, root entries 512, Media descriptor 0xf8, sectors/FAT 152, heads 64, hidden sectors 32, sectors 622204 (volumes > 32 MB) , serial number 0x4ed946e0, label: "boot ", FAT (16 bit) Device details ============== device: /dev/sdk vendor: Kingston model: DT 101 G2 Write tmp/deploy/images/core-image-sato-fri2-noemgd.hddimg to /dev/sdk [y/N]? y Writing image... 303+1 records in 303+1 records out 318568448 bytes (319 MB) copied, 53.6766 s, 5.9 MB/s Signed-off-by: Darren Hart CC: Dexuan Cui CC: Joshua Lock CC: Kishore K Bodke --- scripts/contrib/ddimage | 87 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 87 insertions(+) create mode 100755 scripts/contrib/ddimage (limited to 'scripts/contrib') diff --git a/scripts/contrib/ddimage b/scripts/contrib/ddimage new file mode 100755 index 000000000..2cba9b28f --- /dev/null +++ b/scripts/contrib/ddimage @@ -0,0 +1,87 @@ +#!/bin/sh + +#BLACKLIST_DEVICES="/dev/sda /dev/sdb /dev/sdc /dev/sdd /dev/sde" +BLACKLIST_DEVICES="/dev/sda" + +# 1MB blocksize +BLOCKSIZE=1048576 + +function usage() { + echo "Usage: $(basename $0) IMAGE DEVICE" +} + +function image_details() { + IMG=$1 + echo "Image details" + echo "=============" + echo " image: $(stat --printf '%N\n' $IMG)" + echo " size: $(stat -L --printf '%s bytes\n' $IMG)" + echo " modified: $(stat -L --printf '%y\n' $IMG)" + echo " type: $(file -L -b $IMG)" + echo "" +} + +function device_details() { + DEV=$1 + BLOCK_SIZE=512 + + echo "Device details" + echo "==============" + echo " device: $DEVICE" + if [ -f "/sys/class/block/$DEV/device/vendor" ]; then + echo " vendor: $(cat /sys/class/block/$DEV/device/vendor)" + else + echo " vendor: UNKOWN" + fi + if [ -f "/sys/class/block/$DEV/device/model" ]; then + echo " model: $(cat /sys/class/block/$DEV/device/model)" + else + echo " model: UNKNOWN" + fi + if [ -f "/sys/class/block/$DEV/size" ]; then + echo " size: $[$(cat /sys/class/block/$DEV/size)*BLOCK_SIZE] bytes" + else + echo " size: UNKNOWN" + fi + echo "" +} + +if [ $# -ne 2 ]; then + usage + exit 1 +fi + +IMAGE=$1 +DEVICE=$2 + +if [ ! -e "$IMAGE" ]; then + echo "ERROR: Image $IMAGE does not exist" + usage + exit 1 +fi + + +if [ "${BLACKLIST_DEVICES/${DEVICE}/ERROR}" != "$BLACKLIST_DEVICES" ]; then + echo "ERROR: Device $DEVICE is blacklisted" + exit 1 +fi + +if [ ! -w "$DEVICE" ]; then + echo "ERROR: Device $DEVICE does not exist or is not writable" + usage + exit 1 +fi + +image_details $IMAGE +device_details $(basename $DEVICE) + +echo -n "Write $IMAGE to $DEVICE [y/N]? " +read RESPONSE +if [ "$RESPONSE" != "y" ]; then + echo "Write aborted" + exit 0 +fi + +echo "Writing image..." +dd if="$IMAGE" of="$DEVICE" bs="$BLOCKSIZE" +sync -- cgit v1.2.3