138 lines
3.1 KiB
Bash
138 lines
3.1 KiB
Bash
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#!/bin/bash
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# Create udev-rule and mount-entry for new backup-volume
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ACTION=$1
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case $2 in
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-u)
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UUID=$3
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DEV=$(readlink -f /dev/disk/by-uuid/$UUID)
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PARTUUID="$(blkid /dev/disk/by-uuid/$UUID -o value -s PARTUUID)"
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;;
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u-*)
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UUID=${2#u-}
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DEV=$(readlink -f /dev/disk/by-uuid/$UUID)
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PARTUUID="$(blkid /dev/disk/by-uuid/$UUID -o value -s PARTUUID)"
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;;
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-p)
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PARTUUID=$3
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DEV=$(readlink -f /dev/disk/by-partuuid/$PARTUUID)
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UUID="$(blkid /dev/disk/by-partuuid/$PARTUUID -o value -s UUID)"
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;;
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p-*)
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PARTUUID=${2#p-}
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DEV=$(readlink -f /dev/disk/by-partuuid/$PARTUUID)
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UUID="$(blkid /dev/disk/by-partuuid/$PARTUUID -o value -s UUID)"
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;;
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d-*)
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DEV=${2#d-}
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UUID="$(blkid $DEV -o value -s UUID)"
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PARTUUID="$(blkid $DEV -o value -s PARTUUID)"
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;;
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*)
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DEV="$(/bin/systemd-escape -p -u $2)"
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UUID="$(blkid $DEV -o value -s UUID)"
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#PARTUUID="$(blkid $DEV -o value -s PARTUUID)"
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PRE="d-"
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;;
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esac
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#DESTUDEV="/tmp/"
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#DESTSYSTEMD="/tmp/"
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DESTUDEV="/etc/udev/rules.d/"
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DESTSYSTEMD="/etc/systemd/system/"
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SYSTEMCTL="/bin/systemctl"
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echo "$ACTION ${DEV} | ${UUID} | ${PARTUUID}"
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sleep 1
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if [ "$DEV"x = "x" ]
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then
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TYPE="btrfs"
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else
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TYPE="$(blkid $DEV -o value -s TYPE)"
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echo "T $TYPE | $DEV"
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fi
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if [ "$PARTUUID"x = "x" ]; then
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if [ "$UUID"x = "x" ]; then
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echo "$PARTUUID | $UUID | $DEV is no valid device"
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exit 3
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else
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DUUID="$UUID" #DUUID is uuid which is taken to use
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SUUID="ID_FS_UUID" #SUUID is the string for the udev-rule it's UUID or PARTUUID
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ID="uuid" #ID is also for the udev-rule. To look in /dev/disk/by-uuid or /dev/disk/by-partuuid
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PRE="u-"
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fi
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else
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DUUID="$PARTUUID"
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SUUID="ID_PART_ENTRY_UUID"
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ID="partuuid"
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PRE="p-"
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fi
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#echo "$DUUID | $SUUID | $ID | $PRE"
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# Start by udev
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start () {
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mkdir -p "${DESTSYSTEMD}var-cache-backup.mount.d/"
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cat <<EOF > "${DESTSYSTEMD}var-cache-backup.mount.d/source.conf"
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[Mount]
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What=/dev/disk/by-${ID}/${DUUID}
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EOF
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$SYSTEMCTL daemon-reload
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}
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# Create udev-Rule for new external drive
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register () {
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cat <<EOF > "${DESTUDEV}99-ext-bkp-volume-${PRE}${DUUID}.rules"
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ACTION=="add", KERNEL=="sd*", SUBSYSTEMS=="usb", ENV{${SUUID}}=="$DUUID", SYMLINK+="disk/mars", TAG+="systemd", ENV{SYSTEMD_WANTS}+="mkbackup-external@${PRE}${DUUID}.service", ENV{SYSTEMD_WANTS}+="mkbackup@BKP.target", ENV{SYSTEMD_WANTS}+="smartctl-fast@$(/bin/systemd-escape -p /dev/disk/by-${ID}/${DUUID}).service"
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ACTION=="remove", KERNEL=="sd*", SUBSYSTEMS=="usb", ENV{${SUUID}}="$DUUID", \
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RUN+="${SYSTEMCTL} --no-block stop mkbackup@BKP.target"
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EOF
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}
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# delete udev-rule, if external drive is not longer in use for backups.
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unregister () {
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[ -e "${DESTUDEV}99-ext-bkp-volume-${PRE}${DUUID}.rules" ] && rm "${DESTUDEV}99-ext-bkp-volume-${PRE}${DUUID}.rules"
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}
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case $TYPE in
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btrfs)
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;;
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*)
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echo "$DEV isn't a btrfs-filesystem. Exiting"; exit 1;;
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esac
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case $ACTION in
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register)
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#setup udev-rule for device
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register
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;;
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unregister)
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#delete udev-rule for device
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unregister ;;
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start)
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#activate device
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start;;
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stop)
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#deactivate device
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stop ;;
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*)
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echo "$ACTION not recognized";
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exit 2;;
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esac
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$SYSTEMCTL daemon-reload
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#/bin/systemctl
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exit 0
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