上运行使用Golang grep命令退出状态2

问题描述

我使用Golang到grep一些参数的日志文件，写简单的脚本。这里是我的shell命令

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

的grep科雷无功/日志/ SYS |尾-5 | grep的CD /家庭/拉嘎/回购和放大器;＆安培; git的状态

我想在Golang使用 OS / EXEC 包上面运行的命令。这里是我的code狙击。

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), "\n")```

目前，上述狙击不起作用，因为退出状态2 。
任你们/女士对这个问题的解决方案？太感谢你了。

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.

推荐答案

管（ | ）由shell程序（如bash）的实现。如果你想使用它们，你应该执行shell传递命令包含管道程序调用：

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\"")

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