go simple mon

mon.go

package main

import (
	"bufio"
	"io"
	"os"
	"os/exec"
	"time"
)

func worker(host string, output chan string) {
	cmd := exec.Command("ssh", host)
	stdin, err := cmd.StdinPipe()
	if err != nil {
		panic(err)
	}
	stdout, err := cmd.StdoutPipe()
	if err != nil {
		panic(err)
	}
	if err := cmd.Start(); err != nil {
		panic(err)
	}
	go func() {
		for {
			if _, err := io.WriteString(stdin, "ps aux\n"); err != nil {
				panic(err)
			}
			time.Sleep(time.Second * 1)
		}
	}()
	go func() {
		out := bufio.NewScanner(stdout)
		for out.Scan() {
			output <- out.Text() + "\n"
		}
	}()
	if err := cmd.Wait(); err != nil {
		panic(err)
	}
}

func main() {
	hosts := []string{"[email protected]"}
	if err := os.MkdirAll("/tmp/gomon", 0755); err != nil {
		panic(err)
	}
	for _, host := range hosts {
		output := make(chan string, 10)
		file, err := os.Create("/tmp/gomon/" + host + ".txt")
		if err != nil {
			panic(err)
		}
		go worker(host, output)
		for line := range output {
			if _, err := io.WriteString(file, line); err != nil {
				panic(err)
			}
		}
	}

}