LFTP Progress

lftpprogress

This is a script I use which runs on a scheduler (e.g. cron) every 5 min and sends the progress of a LFTP transfer to MQTT.
In my case I then have NodeRed read it and send it to Telegram. Also, I run LFTP in a docker container, 
so adjust if you do not. Those parts are not covered here.
I also use three threads, so adjust that accordingly also.


#!/bin/bash

exec 100>/var/tmp/lftpprogresslock.lock || exit 1
flock -n 100 || exit 1 # Exit if process is already running
trap 'rm -f /var/tmp/lftpprogresslock.lock' EXIT

CONTNM="lftp-CONTAINER"
DEBUG=false

if [ ${DEBUG} = true ]; then
    TEST_STR="Transferring file \`Files/ISO/Ubuntu/Ubuntu_16.04.iso'"
fi

# Check if lftp-CONTAINER is running
PROC=$(docker ps | grep -c ${CONTNM})
if [ $PROC -gt 0 ] || [ $DEBUG = true ]; then
    FILEPATH_PART=$(docker logs --tail 1 ${CONTNM} | grep "Transferring file" | sed 's/^Transferring file *//')
    if [ ${DEBUG} = true ]; then
        FILEPATH_PART=$(echo "${TEST_STR}" | grep "Transferring file" | sed 's/^Transferring file *//')
    fi
    if [ ! -z "${FILEPATH_PART}" ]; then
        FILEPATH="/storage/${FILEPATH_PART:1:-1}"
        DLFILE=$(echo "${FILEPATH_PART}" | cut -d'/' -f4-)
        STATUS_FILE="${FILEPATH}.lftp-pget-status"

        STATUS_FILE_CONTENTS=$(cat "${STATUS_FILE}")
        if [ ${DEBUG} = true ]; then
            STATUS_FILE_CONTENTS=$(cat /tmp/teststatusfile.txt) # create this temp file to test when DEBUG is enabled
        fi
        FILE_SIZE=$(echo "${STATUS_FILE_CONTENTS}" | grep "size=" | sed 's/^size=//')
        POS0=$(echo "${STATUS_FILE_CONTENTS}" | grep "0.pos=" | sed 's/^0.pos=//')
        POS1=$(echo "${STATUS_FILE_CONTENTS}" | grep "1.pos=" | sed 's/^1.pos=//')
        POS2=$(echo "${STATUS_FILE_CONTENTS}" | grep "2.pos=" | sed 's/^2.pos=//')

        LMT0=$(echo "${STATUS_FILE_CONTENTS}" | grep "0.limit=" | sed 's/^0.limit=//')
        LMT1=$(echo "${STATUS_FILE_CONTENTS}" | grep "1.limit=" | sed 's/^1.limit=//')
        LMT2=$(echo "${STATUS_FILE_CONTENTS}" | grep "2.limit=" | sed 's/^2.limit=//')

        PCT_COMPLETE=$(bc <<< "scale=2; ((($POS2-$LMT1)+($POS1-$LMT0)+($POS0))/$FILE_SIZE)*100")

        mosquitto_pub -t <mqtt topic> -h <mqtt hostname> -m "${DLFILE} is ${PCT_COMPLETE}% complete"
    fi
fi