View DjVu files on Linux framebuffer console using fbi and ddjvu

fbdjview

#!/bin/bash

#
# fbdjview --- View DjVu files on Linux framebuffer console
# By Tigran Aivazian, v1.0, 29 December 2017
# License: GPLv3
#
# Pre-requisites:  fbi and ddjvu (Run "sudo apt install fbi djvulibre-bin" to install on Ubuntu)
#

if [ $# -ne 1 ] ; then
    echo "Usage: fbdjview file.djvu"
    exit 1
fi

if [ ! -f "$1" ] ; then
    echo "fbdjview: No such file \"$1\""
    exit 2
fi

md5=$(md5sum "$1" | cut -d' ' -f1)

cachedir=~/.cache/fbdjview/$md5

function cleanup() {
   echo "Cleaning up $cachedir"
   rm -rf $cachedir
   exit
}

trap cleanup SIGINT

if [ ! -d $cachedir ] ; then
    mkdir -p $cachedir
    echo -n "Please wait, generating cache in $cachedir ..."
    ddjvu -eachpage -scale=150 -format=tiff "$1" $cachedir/page%04d.tif || cleanup
fi

fbi -a $cachedir/page*.tif