killport

#!/usr/bin/env bash
####################################################
# Kills the process running on the specified port  #
####################################################
sendSigKill=false

renderHelp() {
 echo "Kills a service running on the specified port."
 echo "Usage: killport [OPTIONS] PORT"
 echo "Options:"
 echo "   -f    Forcefully kill the process by issuing a SIGKILL, rather than SIGTERM."
 exit 0 
}

while getopts ":hf" opt; do
  case ${opt} in
    h )
      renderHelp
      ;;
    f )
      sendSigKill=true
      ;;
  esac
done
shift $((OPTIND -1))

port=$1

if [[ ${#port} == 0 ]]; then
 renderHelp
fi

# Get everything running on this port
lsofcmd="lsof -i :$port"

# echo the command, and then iterate through each line of the output
counter=0
$(echo $lsofcmd) | while read -r line; do
  counter=$((counter+1)) # We want to skip the first line, as the first line is the column headers, from lsof

  if [[ $counter > 1 ]]; then
    procname=$(echo $line | awk '{print $1}')
    pid=$(echo $line | awk '{print $2}')
    killFlags=''
    logMessage="Killing $procname with PID: $pid"

    if [ "$sendSigKill" = true ]; then
      logMessage="Force-$logMessage"
      killFlags="-9"
    fi

    echo "$logMessage"
    kill "$killFlags" $pid;
  fi
done