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#!/bin/bash
. /etc/crons.conf.d/backup.conf
. /etc/crons.conf.d/rootfs-backup.conf
tar=tar
if type gtar 2>/dev/null >/dev/null; then
tar=gtar
fi
export LANG=en_US
export XZ=${XZ_COMP}
umask 077
now=`date +%Y-%m-%d`
exclude_file=$(mktemp)
tmp_file=$(mktemp)
trap "rm -f ${exclude_file} ${tmp_file}" EXIT
# create list of exludes
rm -f "${exclude_file}"
# exclude backup dir, but remove leading '/'
echo "${DESTDIR}" | sed 's@/@@' >> "${exclude_file}"
IFS=$'\n'; for l in ${EXCLUDE_DIRS}; do
echo "${l}" >> "${exclude_file}"
done
if mkdir ${DESTDIR}/rootfs 2>/dev/null; then
chown ${USER} ${DESTDIR}/rootfs
chmod ${MOD} ${DESTDIR}/rootfs
chmod u+w,+x ${DESTDIR}/rootfs
fi
# create backup
if [ -z "$CPU_LIMIT" ]; then
$tar --exclude-from=${exclude_file} --one-file-system -cJpf \
"${DESTDIR}/rootfs/${now}.tar.xz" -C / . > "${tmp_file}" 2>&1
else
$tar --exclude-from=${exclude_file} --one-file-system -cpf - -C / . |
cpulimit -f -l$CPU_LIMIT -- xz -z - \
> "${DESTDIR}/rootfs/${now}.tar.xz" \
2> "${tmp_file}"
fi
# ignore some warnings
cat "${tmp_file}" | grep -v "socket ignored\|file changed as we read it"
# fix permissions
chown ${USER} "${DESTDIR}/rootfs/${now}.tar.xz"
chmod ${MOD} "${DESTDIR}/rootfs/${now}.tar.xz"
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