如何在golang中检查特定目录上是否具有--bind挂载？

Question

I use following command to check if a directory is mounted.

res := exec.Command("mount", "|", "grep", toDir, ">", "/dev/null").Run()

But it returns exit status 1 no matter if a directory is mounted or not.

mount | grep /path/to/dir > /dev/null

On command line works fine.

How can I get the information?

Answer 1

Since your command involves pipes, you can pass it as a command string to bash instead of executing it directly. Something like this should work.

package main

import (
    "fmt"
    "os/exec"
)

func main() {
    res, _ := exec.Command("sh", "-c", "mount | grep /home").Output()
    fmt.Printf("%s", res)
}