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| - | #!/bin/bash | + | If you download a MeeGo image and would like to run it from a USB stick or MicroSD, you may want to resize the image to use all of the space available on your removable media. This script will resize the downloaded .bin image to whatever size you specify (in M). You can then mount it locally, install packages, etc. before transferring it to your removable media. |
| - | TARGET=$1 | + | #!/bin/bash |
| - | [ -z ${TARGET} ] && die "Usage: $0 meego-image.bin [size in M]" | + | TARGET=$1 |
| - | shift | + | [ -z ${TARGET} ] && die "Usage: $0 meego-image.bin [size in M]" |
| - | SIZE=$1 | + | shift |
| - | [ -z ${SIZE} ] && SIZE=7600 | + | SIZE=$1 |
| + | [ -z ${SIZE} ] && SIZE=7600 | ||
| + | |||
| + | function die { | ||
| + | echo $@ | ||
| + | exit -1 | ||
| + | } | ||
| + | |||
| + | function unhook { | ||
| + | local path=$1 | ||
| + | [ -e "${path}" ] && { | ||
| + | mount | grep -q "${PWD}/${path}" && { | ||
| + | sudo umount "${path}" || die "Unable to unmount '${path}'" | ||
| + | } | ||
| + | rmdir "${path}" || die "Unable to rmdir '${path}'" | ||
| + | } | ||
| + | return 0 | ||
| + | } | ||
| + | |||
| + | function hook { | ||
| + | local path=$1 | ||
| + | local image=$2 | ||
| + | unhook "${path}" | ||
| + | mkdir "${path}" || die "Unable to create directory '${path}'" | ||
| + | local VALUE=($(echo -ne "u b\np\nq\n" | parted "${image}" | grep primary)) | ||
| + | local OFFSET=${VALUE[1]/B} | ||
| + | sudo mount -o loop,offset=${OFFSET} "${image}" "${path}" || | ||
| + | die "Unable to mount '${image}' to '${path}'" | ||
| + | return 0 | ||
| + | } | ||
| + | |||
| + | function resize { | ||
| + | local image=$1 | ||
| + | local size=$2 | ||
| + | local tmp=($(du --apparent-size -B $((1024*1024)) "${image}")) | ||
| + | local current="${tmp[0]}" | ||
| + | [ "${current}" != "${size}" ] && { | ||
| + | echo -n "Settting '${image}' to ${size}M..." | ||
| + | dd if=/dev/zero of=${image} bs=1M seek=$((size - 1)) count=1 > /dev/null | ||
| + | local VALUE=($(echo -ne "u b\np\nq\n" | parted "${image}" | grep btrfs\$)) | ||
| + | [ -z "${VALUE[0]}" ] && die "$0 only supports BTRFS images" | ||
| + | local OFFSET=${VALUE[1]/B} | ||
| + | echo -e "rm 1\nmkpart primary btrfs ${OFFSET}b -1\nq" | parted "${image}" > /dev/null | ||
| + | echo "done" | ||
| + | } | ||
| + | |||
| + | return 0 | ||
| + | } | ||
| + | |||
| + | resize "${TARGET}" 7600 | ||
| + | |||
| + | echo -n "Finalizing image resize..." | ||
| + | TMP=.tmp-resize | ||
| + | hook ${TMP} "${TARGET}" | ||
| + | sudo btrfs filesystem resize max "${TARGET}".*${PWD}/${TMP}.*$,\1,p") | ||
| + | unhook ${TMP} | ||
| + | echo "done" | ||
| - | + | '''NOTE:''' To perform the above you need the btrfs utilities. | |
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If you download a MeeGo image and would like to run it from a USB stick or MicroSD, you may want to resize the image to use all of the space available on your removable media. This script will resize the downloaded .bin image to whatever size you specify (in M). You can then mount it locally, install packages, etc. before transferring it to your removable media.
#!/bin/bash
TARGET=$1
[ -z ${TARGET} ] && die "Usage: $0 meego-image.bin [size in M]"
shift
SIZE=$1
[ -z ${SIZE} ] && SIZE=7600
function die {
echo $@
exit -1
}
function unhook {
local path=$1
[ -e "${path}" ] && {
mount | grep -q "${PWD}/${path}" && {
sudo umount "${path}" || die "Unable to unmount '${path}'"
}
rmdir "${path}" || die "Unable to rmdir '${path}'"
}
return 0
}
function hook {
local path=$1
local image=$2
unhook "${path}"
mkdir "${path}" || die "Unable to create directory '${path}'"
local VALUE=($(echo -ne "u b\np\nq\n" | parted "${image}" | grep primary))
local OFFSET=${VALUE[1]/B}
sudo mount -o loop,offset=${OFFSET} "${image}" "${path}" ||
die "Unable to mount '${image}' to '${path}'"
return 0
}
function resize {
local image=$1
local size=$2
local tmp=($(du --apparent-size -B $((1024*1024)) "${image}"))
local current="${tmp[0]}"
[ "${current}" != "${size}" ] && {
echo -n "Settting '${image}' to ${size}M..."
dd if=/dev/zero of=${image} bs=1M seek=$((size - 1)) count=1 > /dev/null
local VALUE=($(echo -ne "u b\np\nq\n" | parted "${image}" | grep btrfs\$))
[ -z "${VALUE[0]}" ] && die "$0 only supports BTRFS images"
local OFFSET=${VALUE[1]/B}
echo -e "rm 1\nmkpart primary btrfs ${OFFSET}b -1\nq" | parted "${image}" > /dev/null
echo "done"
}
return 0
}
resize "${TARGET}" 7600
echo -n "Finalizing image resize..."
TMP=.tmp-resize
hook ${TMP} "${TARGET}"
sudo btrfs filesystem resize max "${TARGET}".*${PWD}/${TMP}.*$,\1,p")
unhook ${TMP}
echo "done"
NOTE: To perform the above you need the btrfs utilities.