blxkill.sh

#!/bin/bash

NAME="blxkill"

function listProcesses(){
    ps -A -o pid,user,comm | awk 'NR>1'
}

function findPidByPort(){
    lsof -i :${1} -s TCP:LISTEN | awk 'NR == 2 {print $2}'
}

function selectAndKill(){
    [[ "${@}" == "" ]] && echo "Nothing Matched!" && exit 1
    echo -e "${@}" | awk '{print "["NR"]", $0}'

    local ln=$(echo -e "${@}" | wc -l)
    if [[ ${ln} -gt 1 ]]
    then
        read -p "Enter numbers to kill processes (example: 1 2 3): " -r
        [[ ${REPLY} == "*" ]] && local REPLY=$(seq ${ln})
        for n in ${REPLY}
        do
            kill -9 $(echo -e "${@}" | awk "NR == ${n} {print \$1}")
        done
    else
        read -p "Do you want to kill the process?[y/n]" -n 1 -r
        if [[ ${REPLY} =~ ^[Yy]$ ]]
        then
            kill -9 $(echo -e "${@}" | awk '{print $1}')
        fi
        echo
    fi
}

function SelectbyName(){
    local processes=$(listProcesses | awk -v pname="$@" 'tolower($3) ~ tolower(pname)')
    selectAndKill "${processes}"
}

function SelectbyPid(){
    local processes=$(listProcesses | awk -v pid="$@" '$1 == pid')
    selectAndKill "${processes}"
}

function SelectbyPort(){
    local pid=$(findPidByPort "$@")
    local processes=$(listProcesses | awk -v pid="${pid}" '$1 == pid')
    selectAndKill "${processes}"
}

function Usage(){
    cat << EOF
Usage:
  ${NAME}
    [Process Name]              kill by matching process name
    -i, --pid [PID]             kill by pid
    -p, --port [Port Number]    kill by port occupation
EOF
}

[[ ${1} == '' ]] && echo "\"${NAME} -h\" to show usage" && exit 1
case ${1} in
    -i | --pid ) shift && SelectbyPid ${@};;
    -p | --port ) shift && SelectbyPort ${@};;
    -h | --help ) Usage;;
    * ) SelectbyName ${@} ;;
esac