使用Golang运行Grep命令时退出状态2

I write simple script using Golang to grep a log file with some parameters. Here's my shell command

grep CRON var/log/sys | tail -5 | grep "cd /home/raka/repo && git status"

I want to run command above in Golang using os/exec package. Here's my code sniped.

var (
  reader io.Reader
  out    []byte
  err    error
  commandName string = "grep"
)

args := []string{"CRON", "/var/log/syslog", "| tail -6", "| grep \"git status\""}

cmd := exec.Command(commandName, args...)
r, err = cmd.StdoutPipe()
err = cmd.Start()
out, err = ioutil.ReadAll(r)
err = cmd.Wait()

return strings.Split(string(out), "
")```

Currently, the sniped above doesn't work, because of exit status 2. Any of you guys/ladies have solution for this problem? thank you so much.

Pipes (|) are implemented by a shell program (like bash). If you want to use them you should execute shell passing a command containing piped program invocations:

exec.Command("/bin/sh", "-c",
    "grep CRON var/log/sys | tail -5 | grep \"cd /home/raka/repo && git status\"")