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|
#!/bin/bash
rsyncOptions='-6vxcaHAXF'
rsync --help | \
grep -q -- --may-modify-others && \
rsyncOptions="${rsyncOptions} --may-modify-others"
[ -r "#ETCDIR#/backup.conf" ] && \
. "#ETCDIR#/backup.conf"
usage()
{
>&2 echo \
'Usage: backup /tmp/pidFile /path/to/destination/ user@source:path [proxy_user@ssh_host]
Backup files from remote with rsync, possibly via SSH-tunnel.
With no arguments, information is expected to be in array $backups in #ETCDIR#/backup.conf with name of executable (e.g. a symlink) as key.
Options:
/tmp/pidFile location of file to store PID in
/path/to/destination location to store backups in
user@source:path remote data to back up
proxy_user@ssh_host ssh login to proxy node (optional)
#HELPTEXT# #'
[ -z "$1" ] && exit 1
exit $1
}
if [ $# -eq 1 ]
then
if [ "$1" == "--help" ]
then
usage 0
elif [ "$1" == "--version" ]
then
echo '#VERSION#'
exit
fi
fi
seldom=false
if [ $# -eq 0 ]
then
backupID="$(basename $0)"
[ -z "${backups[${backupID}]}" ] && usage
set /tmp/${backupID}.pid ${backups[${backupID}]}
if printf '%s\n' "${seldomBackups[@]}" | \
grep -qxF "${backupID}"; then
seldom=true
fi
fi
Basis="$2"
pidFile="$1"
QuellIP=$(echo "$3" | sed "s|^[a-zA-Z]*://||; s|^[a-zA-Z]*@||; s|:\?/.*$||")
if [ "$#" -eq 3 ]
then
Quelle="$3"
elif [ "$#" -eq 4 ]
then
sshHopp="$4"
lokPort=$[$RANDOM/2+8000]
rsyncShell="-e ssh -6 -p${lokPort} -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null"
tunnelBefehl="ssh -6 -t -t -L[::1]:${lokPort}:${QuellIP}:22 ${sshHopp}"
HoppIP="${sshHopp#*@}"
Quelle="$(echo "$3" | sed "s|${QuellIP}|[::1]|")"
else
usage
fi
if [ -n "${QuellIP}" ]
then
ping -c1 ${QuellIP} > /dev/null || exit 11
fi
if [ -n "${HoppIP}" ]
then
ping -c1 ${HoppIP} > /dev/null || exit 11
fi
if [ ! -d ${Basis} ]
then
[ $(mount | grep -c "\S\+\s\+\S\+\s\+/var/ftp\s") -eq 0 ] && exit 11
exit 2
fi
neues_Datum="${Basis}/$(date "+%Y_%m_%d")"
neues="${Basis}/aktuell"
linkdests=""
for s in $(ls -1 "${Basis}" | sort -r | grep -vxF -m 20 aktuell )
do
linkdests="${linkdests} --link-dest ${Basis}/${s}"
done
if [ ! "$(whoami)" == "root" ]
then
echo "I need to be root."
exit 3
fi
[ -w "${Basis}" ] || exit 11
[ -e "${neues_Datum}" ] && exit 4
if ${seldom}; then
for date_diff in $(seq ${seldomness}); do
if [ -e "${Basis}/$(date '+%Y_%m_%d' -d@$(($(date '+%s')-24*60*60*date_diff)))" ]; then
exit 4
fi
done
fi
[ -e "${pidFile}" ] && exit 5
echo $$ > "${pidFile}"
if [ -n "${tunnelBefehl}" ]
then
${tunnelBefehl} &
backgroundPid=$!
sleep 4
fi
for toExclude in "${excludes[@]}"
do
excludeArgs="${excludeArgs} --exclude ${toExclude}"
done
if [ ! -e "${neues}/wip" ]
then
mkdir -p "${neues}/wip"
fi
chmod 750 "${neues}"{,/wip}
chown root:root "${neues}"{,/wip}
if [ -z "${rsyncShell}" ]
then
rsync ${rsyncOptions} \
${linkdests} \
${excludeArgs} \
${Quelle} "${neues}/wip/"
sleep 1
rsync ${Quelle}
else
rsync "${rsyncShell}" \
${rsyncOptions} \
${linkdests} \
${excludeArgs} \
${Quelle} "${neues}/wip/"
sleep 1
rsync "${rsyncShell}" ${Quelle}
fi
erg=$?
[ -n "${backgroundPid}" ] && kill "${backgroundPid}"
if [ ${erg} -eq 0 ] || [ ${erg} -eq 24 ]
then
chmod o-rwx "${neues}/wip"
neueres_Datum="${Basis}/$(date "+%Y_%m_%d")"
if [ ! -e "${neueres_Datum}" ]; then
neues_Datum="${neueres_Datum}"
fi
mv "${neues}/wip" "${neues_Datum}"
rmdir "${neues}"
rm "${pidFile}"
else
rm "${pidFile}"
exit 11
fi
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