105 lines
2.1 KiB
Plaintext
105 lines
2.1 KiB
Plaintext
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#!/bin/sh
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# Default to avoiding the first two disks on typical Linux and Mac OS installs
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# Better safe than sorry :-)
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BLACKLIST_DEVICES="/dev/sda /dev/sdb /dev/disk1 /dev/disk2"
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# 1MB blocksize
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BLOCKSIZE=1048576
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usage() {
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echo "Usage: $(basename $0) IMAGE DEVICE"
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}
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image_details() {
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IMG=$1
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echo "Image details"
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echo "============="
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echo " image: $(basename $IMG)"
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# stat format is different on Mac OS and Linux
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if [ "$(uname)" = "Darwin" ]; then
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echo " size: $(stat -L -f '%z bytes' $IMG)"
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echo " modified: $(stat -L -f '%Sm' $IMG)"
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else
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echo " size: $(stat -L -c '%s bytes' $IMG)"
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echo " modified: $(stat -L -c '%y' $IMG)"
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fi
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echo " type: $(file -L -b $IMG)"
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echo ""
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}
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device_details() {
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DEV=$1
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BLOCK_SIZE=512
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echo "Device details"
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echo "=============="
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# Collect disk info using diskutil on Mac OS
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if [ "$(uname)" = "Darwin" ]; then
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diskutil info $DEVICE | egrep "(Device Node|Media Name|Total Size)"
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return
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fi
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# Default / Linux information collection
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echo " device: $DEVICE"
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if [ -f "/sys/class/block/$DEV/device/vendor" ]; then
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echo " vendor: $(cat /sys/class/block/$DEV/device/vendor)"
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else
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echo " vendor: UNKOWN"
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fi
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if [ -f "/sys/class/block/$DEV/device/model" ]; then
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echo " model: $(cat /sys/class/block/$DEV/device/model)"
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else
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echo " model: UNKNOWN"
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fi
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if [ -f "/sys/class/block/$DEV/size" ]; then
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echo " size: $(($(cat /sys/class/block/$DEV/size) * $BLOCK_SIZE)) bytes"
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else
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echo " size: UNKNOWN"
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fi
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echo ""
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}
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if [ $# -ne 2 ]; then
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usage
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exit 1
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fi
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IMAGE=$1
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DEVICE=$2
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if [ ! -e "$IMAGE" ]; then
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echo "ERROR: Image $IMAGE does not exist"
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usage
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exit 1
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fi
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for i in ${BLACKLIST_DEVICES}; do
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if [ "$i" = "$DEVICE" ]; then
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echo "ERROR: Device $DEVICE is blacklisted"
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exit 1
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fi
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done
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if [ ! -w "$DEVICE" ]; then
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echo "ERROR: Device $DEVICE does not exist or is not writable"
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usage
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exit 1
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fi
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image_details $IMAGE
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device_details $(basename $DEVICE)
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printf "Write $IMAGE to $DEVICE [y/N]? "
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read RESPONSE
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if [ "$RESPONSE" != "y" ]; then
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echo "Write aborted"
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exit 0
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fi
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echo "Writing image..."
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dd if="$IMAGE" of="$DEVICE" bs="$BLOCKSIZE"
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sync
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