killatom.go

package main

import (
	"bytes"
	"fmt"
	"log"
	"os/exec"
	"strconv"
)

// ExecPs returns output of ps aux command
func ExecPs() ([][]byte, error) {
	buf, err := exec.Command("ps", "aux").Output()
	if err != nil {
		return nil, err
	}
	out := bytes.Split(buf, []byte("\n"))
	return out, nil
}

// Filter extracts Atom processes
func Filter(rows [][]byte) [][]byte {
	var out [][]byte
	for _, buf := range rows {
		if bytes.Contains(buf, []byte("/Applications/Atom.app")) {
			out = append(out, buf)
		}
	}
	return out
}

// GetPid extracts process ID from ps output
func GetPid(rows [][]byte) ([]int, error) {
	out := []int{}
	for _, buf := range rows {
		buf = bytes.Fields(buf)[1]
		sbuf := string(buf)
		ibuf, err := strconv.Atoi(sbuf)
		if err != nil {
			return nil, err
		}
		out = append(out, ibuf)
	}
	return out, nil
}

// KillProcess executes kill command for given process id
func KillProcess(pid int) error {
	cmd := exec.Command("kill", strconv.Itoa(pid))
	fmt.Println("kill " + strconv.Itoa(pid))
	err := cmd.Run()
	return err
}

func main() {
	// execute ps aux command
	out, err := ExecPs()
	if err != nil {
		log.Fatal(err)
	}

	// extract the result with Atom process
	out = Filter(out)

	// get process ID
	pids, err := GetPid(out)
	if err != nil {
		log.Fatal(err)
	}

	// execute kill command for IDs of the Atom processes
	for _, pid := range pids {
		err = KillProcess(pid)
		if err != nil {
			log.Fatal(err)
		}
	}
}