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|
#!/bin/sh
set -e
# This script only supports GPT partitions for the lx-trainer image.
ROOTPT=3
EXTRAPT=4
usage_exit()
{
echo
echo "usage: sudo $0 src [--layer=tarball]... dest [dest]..."
echo
echo "example: copying image to devices: sde, sdf, sdg"
echo "$0 lx-trainer.img /dev/sde /dev/sdf /dev/sdg"
echo
echo " use --keep-files to speed up multiple calls"
echo " (so that vmdk and img can be re-used later)"
echo
exit 1
}
# minimum 2 arguments
if [ $# -lt 2 ]; then
echo "error: invalid arguments"
usage_exit
fi
if [ `id -u` -ne 0 ]; then
echo "error: sorry, this script must be run as root"
exit 1
fi
if [ -z "`which mkexfatfs`" ]; then
echo "error: mkexfatfs program not found"
echo
echo "try this:"
echo "sudo apt install exfat-utils exfat-fuse"
exit 1
fi
if [ -z "`which qemu-img`" ]; then
echo "error: qemu-img program not found"
echo
echo "try this:"
echo "sudo apt install qemu-utils"
exit 1
fi
# gather arguments
SRC=""
LAYERS=""
DESTS=""
KEEP_FILES=0
for arg in $@; do
case $arg in
--layer=*)
LAYERS="$LAYERS `echo $arg | sed -e 's/^--layer=//'`"
;;
--keep-files)
KEEP_FILES=1
;;
--*)
echo "error: unknown option: $arg"
usage_exit
;;
*)
if [ -z "$SRC" ]; then
SRC="$arg"
else
DESTS="$DESTS $arg"
fi
;;
esac
done
# source must be file
if [ ! -f "$SRC" ]; then
echo "error: invalid src"
usage_exit
fi
# destination must be block device
for dest in $DESTS; do
if [ ! -b $dest ]; then
echo "error: invalid dest: $dest"
usage_exit
fi
done
# all layers must be available
for tarball in $LAYERS; do
if [ ! -f $tarball ]; then
echo "error: missing layer file: $tarball"
usage_exit
fi
done
# detect partion type of source
if [ "`env - /sbin/parted --script $SRC print | \
grep 'Partition Table' | awk '{print $3}'`" != "gpt" ]; then
echo "error: only gpt partition tables supported"
usage_exit
fi
SRC_FILE="${SRC}_copy.img"
VMDK_FILE="${SRC_FILE}.vmdk"
# setup temp directory for mountpoints
TMP_ROOT="/tmp/dd-multi-`date +%s`.$$"
rm -rf $TMP_ROOT
mkdir -p $TMP_ROOT
echo "using directory $TMP_ROOT for mount points"
if [ $KEEP_FILES -eq 1 -a -f $SRC_FILE ]; then
echo 'using existing prepared copy of the image'
if [ -n "$LAYERS" ]; then
echo '(SPECIFIED LAYERS WILL NOT BE RE-UNPACKED)'
fi
else
echo 'creating a sparse copy of the image'
cp -a --sparse=always $SRC $SRC_FILE
if [ -n "$LAYERS" ]; then
LOOPDEV=`losetup --show -P -f $SRC_FILE`
LOOPPT="${LOOPDEV}p${ROOTPT}"
mkdir -p ${TMP_ROOT}${LOOPPT}
mount $LOOPPT ${TMP_ROOT}${LOOPPT}
for tarball in $LAYERS; do
echo "unpacking layer: $tarball"
tar -x -f $tarball --numeric-owner \
-C ${TMP_ROOT}${LOOPPT}
done
sync
umount ${LOOPPT}
losetup -d $LOOPDEV
fi
fi
if [ $KEEP_FILES -eq 1 -a -f $VMDK_FILE ]; then
echo 'using existing prepared vmdk file'
else
echo 'creating vmdk file'
qemu-img convert -O vmdk $SRC_FILE $VMDK_FILE
fi
# delete mbr's
dd if=/dev/zero bs=10M count=1 2> /dev/null | tee $DESTS > /dev/null
partprobe $DESTS
# efficiently copy source to all destinations and rescan devices
echo 'writing image to disks (64GiB)'
dd if=$SRC_FILE bs=128M status=progress | tee $DESTS > /dev/null
# fix partition table and add extra partition
for dest in $DESTS; do
echo fix | sudo parted ---pretend-input-tty $dest print > /dev/null 2>&1
parted --script --align optimal -- $dest mkpart /extra ntfs 128GB 256GB
done
# rescan devices
while ! partprobe $DESTS 2> /dev/null; do
echo "waiting for partprobe..."
sleep 1
done
sleep 1
# wait for partitions to appear
for dest in $DESTS; do
while [ ! -b ${dest}${ROOTPT} ]; do
echo "waiting for ${dest}${ROOTPT}..."
sleep 1
done
while [ ! -b ${dest}${EXTRAPT} ]; do
echo "waiting for ${dest}${EXTRAPT}..."
sleep 1
done
done
sleep 1
# create exfat on extra partition
for dest in $DESTS; do
mkexfatfs ${dest}${EXTRAPT} > /dev/null 2>&1
done
for dest in $DESTS; do
mkdir -p ${TMP_ROOT}${dest}${EXTRAPT}
mount ${dest}${EXTRAPT} ${TMP_ROOT}${dest}${EXTRAPT}
cp -v $VMDK_FILE ${TMP_ROOT}${dest}${EXTRAPT}/training-hd.vmdk &
done
wait
sync
for dest in $DESTS; do
umount ${TMP_ROOT}${dest}${EXTRAPT}
done
# cleanup temp directory
rm -rf $TMP_ROOT
if [ $KEEP_FILES -ne 1 ]; then
rm -f $VMDK_FILE $SRC_FILE
else
echo "as requested, not removing:"
echo " $VMDK_FILE"
echo " $SRC_FILE"
fi
echo 'done, no errors'
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