luks-list

#!/bin/bash

tty -s &&    RED=$(tput setaf 1 2>/dev/null || echo $'\e[0;31m') ||    RED=
tty -s &&  GREEN=$(tput setaf 2 2>/dev/null || echo $'\e[0;32m') ||  GREEN=
tty -s && YELLOW=$(tput setaf 3 2>/dev/null || echo $'\e[0;33m') || YELLOW=
tty -s &&  RESET=$(tput sgr0    2>/dev/null || echo $'\e[0m')    ||  RESET= # reset fg/bg color

if [ -n "$(shopt -s nullglob; echo /dev/mapper/*_crypt)" ]; then
	MAP_COUNT=$(dmsetup ls --target crypt | wc -l) # returns not 0 when no devices are mapped, because "No devices found" is returned
else
	MAP_COUNT=0
fi
echo "${GREEN}Mapped devices ($MAP_COUNT):$YELLOW"
if [ "$MAP_COUNT" -gt 0 ]; then
	echo
	dmsetup ls --target crypt | column -t
fi
echo "$RESET"

MOUNT_COUNT=$(mount | grep -c ^/dev/mapper/)
echo "${GREEN}Mount points ($MOUNT_COUNT):$YELLOW"
MOUNTS=$(mount | grep ^/dev/mapper/ | awk '{print $1" --> "$3}' | column -t)
if [ -n "$MOUNTS" ]; then
	echo
	echo "$MOUNTS"
fi
echo "$RESET"

if (( MAP_COUNT > MOUNT_COUNT)); then
	echo "${RED}Info: Not all devices are mounted.$RESET"
	echo
	exit 1
fi >&2