Script to configure Transmission on Raspberry Pi to only run when I'm not home - afternoon - or when I'm sleeping.

transmission_workday.sh

#!/bin/bash
#  Run this script WITHOUT Sudo. 
#  This script assumes you have installed transmission-daemon 
# on your Raspberry Pi (or whatever where you are running it...)
#  Running it will use cron to pause and unpause all your torrents
# at specific times.
#  Right now you, no torrents will be downloaded from 5 am to 9 am and
# also no torrents will be downloaded from 5 pm to 11 pm.

THISFOLDER=`pwd`
THISNOW=`date +"%m%d%y-%H%M%S"`
PAUSEALL="transmission-remote --torrent all --stop"
RESUMEALL="transmission-remote --torrent all --start"

for i in "$@" ; do
    if [[ $i == "--uninstall" ]] ; then
        crontab -l | while read -r; do
            [[ $REPLY = *$PAUSEALL* ]] || [[ $REPLY = *$RESUMEALL* ]] && continue
            printf '%s\n' "$REPLY"
        done | crontab -
        echo " "
        echo "removed entries from cron"
        echo " "
        exit
    fi

    if [[ $i == "--help" ]] ; then
        echo "usage"
        echo "$0 "
        echo "  :: configure cron to pause transmission when you are awake at home "
        echo ""
        echo "$0 --uninstall "
        echo "  :: removes any modifications from this file on cron "
        echo ""
        echo "$0 --help "
        echo "  :: show this message "

        exit
    fi
done

#keep a copy of current crontab
crontab -l > original.$THISNOW.cronfile

#let's make a new crontab
crontab -l | while read -r; do
    [[ $REPLY = *$PAUSEALL* ]] || [[ $REPLY = *$RESUMEALL* ]] && continue
    printf '%s\n' "$REPLY"
done | crontab -

crontab -l > /tmp/new.cronfile

printf "\n...adding to cron...\n"
#echo new cron into cron file
# first the weekdays
echo "0 5,17 * * 1-5 $PAUSEALL" >> /tmp/new.cronfile
echo "0 9,23 * * 1-5 $RESUMEALL" >> /tmp/new.cronfile
# now the weekends
echo "0 9 * * 0,6 $PAUSEALL" >> /tmp/new.cronfile
echo "0 23 * * 0,6 $RESUMEALL" >> /tmp/new.cronfile

echo " "  >> /tmp/new.cronfile

#install new cron file
crontab /tmp/new.cronfile

#remove new cron file
rm /tmp/new.cronfile

#say success
printf "\nTransmission should only work when you are not home.\n\n"