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#!/bin/sh
# Unmount USB drives or Android phones. Replaces the older `dmenuumount`. Fewer
# prompt and also de-decrypts LUKS drives that are unmounted.
DMENU="$(command -v cdmenu)"
set -e
mounteddroids="$(grep simple-mtpfs /etc/mtab | awk '{print "📱" $2}')"
lsblkoutput="$(lsblk -nrpo "name,type,size,mountpoint")"
mounteddrives="$(echo "$lsblkoutput" | awk '($2=="part"||$2="crypt")&&$4!~/\/boot|\/home$|SWAP/&&length($4)>1{printf "💾%s (%s)\n",$4,$3}')"
allunmountable="$(echo "$mounteddroids
$mounteddrives" | sed "/^$/d;s/ *$//")"
test -n "$allunmountable"
chosen="$(echo "$allunmountable" | $DMENU -l 16 -i -p "Unmount which drive?")"
chosen="${chosen%% *}"
test -n "$chosen"
# check for blocking processes
bprocs=$(lsof "/${chosen#*/}" | tail -n +2 | awk '{print $1 " " $2}' | uniq)
if [ -n "$bprocs" ]; then
bPIDs="$(echo "$bprocs" | awk '{print $2}')"
notify-send "Unmount $chosen" "Blocking processes:\n$bprocs"
action=$(printf 'nothing\nlazy\nterminate\nkill' | "$DMENU" -i -p "$chosen is busy: (abort), (lazy) unmount or (terminate)/(kill) blocking processes")
case $action in
nothing)
notify-send "Unmount aborted" "$chosen"
exit 1;;
lazy) sudo -A umount -l "/${chosen#*/}";;
terminate) echo "$bPIDs" | while IFS="$(printf '\n')" read -r pid ; do kill "$pid"; done ;;
kill) echo "$bPIDs" | while IFS="$(printf '\n')" read -r pid ; do kill -9 "$pid"; done ;;
esac
fi
sudo -A umount "/${chosen#*/}"
notify-send "Unmounted" "$chosen"
# Close the chosen drive if decrypted.
cryptid="$(echo "$lsblkoutput" | grep "/${chosen#*/}$")"
cryptid="${cryptid%% *}"
test -b /dev/mapper/"${cryptid##*/}"
sudo -A cryptsetup close "$cryptid"
notify-send "Encryption closed" "$chosen"
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