Spawning Processes

import "fmt"

import "io/ioutil"

import "os/exec"

func main() {

    datecmd := exec.Command("date")

    dateout, err := datecmd.Output()

    if err != nil {

        panic(err)

    }

    fmt.Println(">date")

    fmt.Println(string(dateout))

    grepcmd := exec.Command("grep", "hello")

    grepin, _ := grepcmd.StdinPipe()

    grepout, _ := grepcmd.StdoutPipe()

    grepcmd.Start()

    grepin.Write([]byte("hello grep\ngoodbye grep"))

    grepin.Close()

    grepbytes, _ := ioutil.ReadAll(grepout)

    grepcmd.Wait()

    fmt.Println(">grep hello")

    fmt.Println(string(grepbytes))

    lscmd := exec.Command("bash", "-c", "ls -a -l -h")

    lsout, err := lscmd.Output()

    if err != nil {

        panic(err)

    }

    fmt.Println(">ls -a -l -h")

    fmt.Println(string(lsout))

}