Hacking_and_Penetration_Testing_with_Low_Power_Devices

Chapter 3 Appendix: digging deeper into the setup script
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# copy files to root filesystem
# this primarily involves untaring a large file
# some of the less insightful parts of this function have been\
removed
# for brevity
populate_rootfs () {
echo "Populating rootfs Partition"
echo "Please be patient, this may take a few minutes, as\
its transfering a lot of data.."
echo "———————————————————————————"
# create a temporary directory if it doesn’t exist
if [ ! -d ${TEMPDIR}/disk ] ; then
mkdir -p ${TEMPDIR}/disk
fi
partprobe ${media}
# mount the root partition
if ! mount -t ${ROOTFS_TYPE} ${media_prefix}2\
${TEMPDIR}/disk; then
echo "———————————————————————————"
echo "Unable to mount ${media_prefix}2 at\
${TEMPDIR}/disk to complete populating rootfs\
Partition"
echo "Please retry running the script, sometimes\
rebooting your system helps."
echo "———————————————————————————"
exit
fi
if [ -f "${DIR}/${ROOTFS}" ] ; then
# use correct flags for our file archive
echo "${DIR}/${ROOTFS}" j grep ".tgz"\
&& DECOM¼"xzf"
echo "${DIR}/${ROOTFS}" j grep ".tar" && DECOM¼"xf"
# pv displays a nice progress bar these lines use\
it if available
if which pv > /dev/null ; then
pv "${DIR}/${ROOTFS}" j tar --numeric-owner\
--preserve-permissions -${DECOM} - -C\
${TEMPDIR}/disk/
else
echo "pv: not installed, using tar verbose\
to show progress"
tar --numeric-owner --preserve-permissions\
--verbose -${DECOM} "${DIR}/${ROOTFS}" -C\
${TEMPDIR}/disk/
fi