Cron script to control

checkDisk.sh

# Name: checkDisk.sh
# Created by: Brimur
# Created: Nov 26th 2019
# This script is used to control Transmission jobs based on available disk space.
#
# This should be run as a cronjob (every minute) on the server/computer running Transmission
#
# If you use a download manager tell it to add jobs as PAUSED
#
# - If disk is nearly full (limit) then stop all jobs
#
# - Gets list of running jobs
# --- Checks if there is enough space to complete all runnning jobs
# --- Stops one or more jobs if there is not enough space to complete
# - Gets list of stopped jobs
# --- Check size of job and starts it if there is enough space to complete the job
#

#!/bin/bash

# Customise here...
partition="/dev/mapper/vg-lv_root"
threshold="95"
#End customise

percent=$(df -h | grep $partition | awk '{ print $5 }' | sed 's/%//g')
echo Disk is "$percent" % full
if ((percent > threshold))
then

        echo Disk is "$percent" % full. Stopping Torrents
        transmission-remote -n 'transmission:transmission' -t all -S


else

        space=$(df -h | grep "$partition" | awk '{ print $4 }' | sed 's/G//g')
        space=$(echo "($space*1000 +0.5)/1" | bc)
        echo Free space is "$space" MBs
        eta=0
        for tor in $(transmission-remote -l | grep -Ev "Finished|Stopped|ID|Sum:" | sed 's/%//g' | awk '{print $1}'); do
                name=$(transmission-remote -t "$tor" -i | grep "Name:" | awk '{print $2}' | cut -d'.' -f1,2,3)
                total=$(transmission-remote -t "$tor" -i | grep "Total size" | sed 's/(//g' | awk '{print $5}')
                totalType=$(transmission-remote -t "$tor" -i | grep "Total size" | sed 's/(//g' | awk '{print $6}')
                have=$(transmission-remote -t "$tor" -i | grep "Have" | sed 's/(//g' | sed 's/)//g' | awk '{print $4}')
                haveType=$(transmission-remote -t "$tor" -i | grep "Have" | sed 's/(//g' | sed 's/)//g' | awk '{print $5}')
                dTime=$(transmission-remote -t "$tor" -i | grep "Downloading Time" | sed 's/.*(\(.*\))/\1/' | awk '{print $1}')
                eta=$(transmission-remote -t "$tor" -i | grep "ETA:" | sed 's/.*(\(.*\))/\1/' | awk '{print $1}')
                #echo Looking at "$name"
                if [ "$total" == "wanted)" ];then
                        total=0
                fi
                if [ "$have" == "verified" ]; then
                        have=0
                fi
                if [ "$totalType" == "GB" ]; then
                        total=$(echo "($total + 0.5)/1" | bc)
                        total=$(echo "$total*1000" | bc)
                fi
                if [ "$haveType" == "GB" ]; then
                                have=$(echo "($have + 0.5)/1" | bc)
                        have=$(echo "$have*1000" | bc)
                fi
                left=$(echo "($total - $have +0.5)/1" | bc)

                #echo Tor: $tor -  Left $left - Space $space - ETA $eta - Downloading $dTime
                if (( left > space && eta>1800 && dTime>600 ))
                then

                echo "$name" is running but needs "$left" MBs to complete and there is only "$space" left so stopping it
                transmission-remote -n 'transmission:transmission' -t "$tor" -S
                #elif (( eta > 86400 ))
                #then
                #       echo "$name" ETA is very high so just going to ignore it
                #elif (( eta == 0 ))
                #then
                #       echo "$name" ETA is very high so just going to ignore it



                else
                        if(( left < space ))
                        then
                                space=$(echo "($space - $left +0.5)/1" | bc)
                                                echo "$name" needs another "$left" MBs to finish so available space is now "$space" MBs
                        else
                                oldSpace=$space
                                space=$(echo "($space - $left +0.5)/1" | bc)
                                echo "$name" needs another "$left" MBs but the ETA of "$eta" suggests it will finish before disk space runs out.
                                echo ... temporarily setting disk space to "$space"
                        fi
                fi


        done

        stop=$(transmission-remote -l | grep -e Unknown | grep -e Stopped -c)
        echo There are "$stop" stopped torrents and "$space" MBs free space

        for tor in $(transmission-remote -l | grep -e "Stopped" | awk '{print $1}'); do
                name=$(transmission-remote -t "$tor" -i | grep "Name:" | awk '{print $2}' | cut -d'.' -f1,2,3)
                total=$(transmission-remote -t "$tor" -i | grep "Total size" | sed 's/(//g' | awk '{print $5}')
                totalType=$(transmission-remote -t "$tor" -i | grep "Total size" | sed 's/(//g' | awk '{print $6}')
                have=$(transmission-remote -t "$tor" -i | grep "Have" | sed 's/(//g' | sed 's/)//g' | awk '{print $4}')
                haveType=$(transmission-remote -t "$tor" -i | grep "Have" | sed 's/(//g' | sed 's/)//g' | awk '{print $5}')
                dTime=$(transmission-remote -t "$tor" -i | grep "Downloading Time" | sed 's/.*(\(.*\))/\1/' | awk '{print $1}')

                if [ "$total" == "wanted)" ];then
                        total=0
                fi
                if [ "$have" == "verified" ]; then
                        have=0
                fi

                if [ "$totalType" == "GB" ]; then
                         total=$(echo "($total + 0.5)/1" | bc)
                                 total=$(echo "$total*1000" | bc)

                fi

                if [ "$haveType" == "GB" ]; then
                        have=$(echo "($have + 0.5)/1" | bc)
                                have=$(echo "$have*1000" | bc)
                fi


                        if [ "$have" == "None" ] || [ "$have" == "verified" ];  then
                                        have=0
                        fi

                left=$(echo "($total - $have +0.5)/1" | bc)
                if ((space > left))
                        then
                                echo Starting "$name" because "$left" MBs remaining and that is less than "$space" MBs
                                transmission-remote -n 'transmission:transmission' -t "$tor" -s
                                 space=$(echo "($space - $left +0.5)/1" | bc)
                elif ((dTime < 600))
                then
                        echo Starting "$name" because its new and I want to see how fast and big is it
                                        transmission-remote -n 'transmission:transmission' -t "$tor" -s


                else
                                echo Skipping "$name" as it requires "$left" MBs to complete but there is only "$space" MBs left
                fi
        done

fi