shell-base/modules/utility/sync.lib

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#!/bin/bash
mirror_rootfs () {
[[ ! $(command -v rsync) ]] && { echo rsync must be installed to use this function; return 5; }
dr="--dry-run"
dest=$(realpath -s $1)
rootfs=$(realpath -s "${2:-/}")
[ ! -d "$dest" ] && echo destination $dest is not a directory && return 3
[ ! -d "$rootfs/etc" ] && echo not root filesystem at $rootfs && return 3
echo making mirror of root filesystem to
rfse=rootfs_excludes
if sudo rsync -axHAWXS $dr --numeric-ids --delete --delete-excluded --force --exclude-from="$(rootfs_excludles)" / /mnt/adrive/nas/@rootfs; then
echo making mirror of boot partition to /mnt/adrive/nas/@rootfs
if sudo rsync -axHAWXS $dr --numeric-ids --force --delete /boot/ /mnt/adrive/nas/@boot; then
echo doit
else
echo unable to sync a copy of /boot, aborted backup
fi
else
echo unable to sync a copy of root file system, backkup failed
fi
}
rootfs_excludes () {
local list; local delete
[[ $1 == "-l" ]] && list=true && shift
[[ $1 == "-r" ]] && delete=true && shift
[[ "$1" == "-"* ]] && >&2 echo bad option, aborting && return 1
rfse=${1:-/tmp/rootfs_excludes.lst}
[[ $delete ]] && rm $rfse
cat <<EOF > $rfse
.[Tt]rash*
tmp/
cache/
log/
log[s]/
lost+found
EOF
if [[ $list ]];then
cat $rfse; rm -f $rfse
else
echo $rfse
fi
}
mountpoints () {
cat /proc/mounts | cut -d ' ' -f2 | sort
}