diff --git a/snapsh b/snapsh index e634f43..e685614 100755 --- a/snapsh +++ b/snapsh @@ -25,6 +25,7 @@ BTRFS_EXECUTABLE=$(which btrfs) TIMESTAMP=$(date +%Y.%m.%d-%H:%M:%S) SUBVOLUME="root" DESCRIPTION="" +REMOVE_TARGET="" @@ -39,10 +40,8 @@ Options: snapsh -d \"A snapshot\" -s root -s SUBVOL, --snapshot SUBVOL Take a snapshot of subvolume named SUBVOL. -l, --list List snapshots - -Exit codes: - 2 - Invalid options - 3 - Target subvolume does not exist\n" + -r NUMBER, --remove NUMBER Remove snapshot NUMBER. See snapshot numbers with + snapsh -l\n" } @@ -61,7 +60,7 @@ snapshot() { ${BTRFS_EXECUTABLE} subvolume create ${SNAPSHOTS_LOCATION} unset ${REPLY} else - EXIT_CODE=3 + EXIT_CODE=1 fi else printf "Creating snapshot of subvolume ${SUBVOLUME} as ${SUBVOLUME}_snapshot_${TIMESTAMP}\n" @@ -95,7 +94,7 @@ snapshot() { list() { root_check - NUM=0 + NUM=1 printf "%6s %s %s %26s %s %s %6s %s %s\n" "Number" "|" "Time:" "|" "Source" "|" "Type" "|" "Description" for snapshot in ${SNAPSHOTS_LOCATION}/*/; do . ${snapshot}/.snapsh @@ -107,11 +106,43 @@ list() { +remove() { + root_check + SNAPSHOTS=(${SNAPSHOTS_LOCATION}/*/) + let INDEX=${REMOVE_TARGET}-1 + TARGET=${SNAPSHOTS[${INDEX}]} + . ${TARGET}/.snapsh + + if [[ "${INDEX}" -gt "${#SNAPSHOTS[@]}" ]]; then + printf "Snapshot number ${REMOVE_TARGET} does not exist.\n" + list + exit 1 + elif [[ "${REMOVE_TARGET}" -lt 1 ]]; then + printf "Number must be a positive integer.\n" + list + exit 1 + fi + + printf "Delete snapshot ${REMOVE_TARGET}: ${DATE}, subvolume ${SOURCE_SUBVOLUME}, ${DESCRIPTION} (y/n)? " + read -n 1 + if [[ "${REPLY}" == "y" ]]; then + printf "\n" + ${BTRFS_EXECUTABLE} property set ${TARGET} ro false + ${BTRFS_EXECUTABLE} subvolume delete ${TARGET} + exit 0 + else + printf "\nAborted by user.\n" + exit 1 + fi +} + + + # Check for root permissions root_check() { if [[ "$UID" -ne 0 ]]; then printf "This option needs root permission.\n" - exit 3 + exit 1 fi } @@ -120,18 +151,18 @@ root_check() { # If no options are given, display help if [[ "$#" -eq 0 ]]; then help - exit 2 + exit 0 fi # Options parsing: -OPTIONS=$(getopt -a -n snapsh -o hs:d:l --long help,snapshot:,description:,list -- "$@") +OPTIONS=$(getopt -a -n snapsh -o hs:d:lr: --long help,snapshot:,description:,list,remove: -- "$@") # Invalid options (getopt returns nonzero) if [[ "$?" -ne 0 ]]; then printf "Error Parsing options\n" help - exit 2 + exit 1 fi eval set -- "$OPTIONS" @@ -160,6 +191,13 @@ while true; do shift ;; + -r | --remove) + REMOVE_TARGET="$2" + remove + shift 2 + ;; + + esac done