nnn/plugins/nmount
8B411 a51437ff16
Miscellaneous improvements to nmount plugin (#1547)
* plugins/nmount: keep `while` & `do` on one line for consistency

* plugins/nmount: sync only that device, which user wants to unmount

* plugins/nmount: replace all instances of `$dev` with `/dev/$dev`

* plugins/nmount: add `--no-user-interaction` option to `udisksctl`

Otherwise the user will be asked for authentication each time he wants
to unmount, say, HDD, since `udisksctl` will try to power it off.

* plugins/nmount: try to mount only existing block devices

* plugins/nmount: do not invoke `lsblk` immediately after mounting

Sometimes `lsblk` fails to provide mountpoint in such a short time frame.

* plugins/nmount: simplify pipe

* plugins/nmount: keep `echo` arguments in a single pair of quotes

* plugins/nmount: report mountpoint only if mounting was successful
2022-12-21 23:14:28 +05:30

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#!/usr/bin/env sh
# Description: Toggle mount status of a device using pmount
# If the device is not mounted, it will be mounted.
# If the device is mounted, it will be unmounted and powered down.
#
# Dependencies: lsblk, pmount
#
# Usage: Runs `lsblk` on 'l', exits on 'Return`.
#
# Notes:
# - The script uses Linux-specific lsblk to list block devices. Alternatives:
# macOS: "diskutil list"
# BSD: "geom disk list"
# - The script uses udisksctl (from udisks2) to power down devices. This is also Linux-specific.
# Users on non-Linux platforms can comment it and use an alterntive to power-down disks.
#
# Shell: POSIX compliant
# Author: Arun Prakash Jana
prompt="device name [e.g. sdXn] ('l'ist, 'q'uit): "
lsblk
printf "\nEnsure you aren't still in the mounted device.\n"
printf "%s" "$prompt"
read -r dev
while [ -n "$dev" ]; do
if [ "$dev" = "l" ]; then
lsblk
elif [ "$dev" = "q" ]; then
exit
else
if grep -qs "$dev " /proc/mounts; then
sync "$(lsblk -n "/dev/$dev" -o MOUNTPOINT | sed "/^$/d")"
if pumount "/dev/$dev"; then
echo "/dev/$dev unmounted."
if udisksctl power-off -b "/dev/$dev" --no-user-interaction; then
echo "/dev/$dev ejected."
fi
fi
elif [ -b "/dev/$dev" ]; then
if pmount "/dev/$dev"; then
sleep 1
echo "/dev/$dev mounted to $(lsblk -n "/dev/$dev" -o MOUNTPOINT | sed "/^$/d")."
fi
else
echo "/dev/$dev does not exist or is not a block device."
fi
fi
echo
printf "%s" "$prompt"
read -r dev
done