Pipe string into STDIN of command in Golang

Question

I want to replicate the following subprocess.run function call in Golang. What would be the correct way to do it?

subprocess.run(['kinit', username], input=password.encode())

So far, I've figured out how to use exec.Command to run external commands, but what's confusing me is passing strings as input to STDIN of that command. Python's subprocess.run has a handy input parameter that takes care of this, how can I achieve similar results in Golang?

Sumit Ghosh · Accepted Answer · 2018-04-18 13:35:27Z

8

I figured out how to do it.

package main

import "os/exec"
import "strings"

func main() {
    cmd := exec.Command("kinit", username)
    cmd.Stdin = strings.NewReader(password)
    err := cmd.Run()
}

The Stdin attribute of the Command object is the STDIN pipe, we can set it to a strings.NewReader object containing the input string to achieve the same effect as of the Python snipped mentioned in the question.

answered Apr 18, 2018 at 13:35

Sumit Ghosh

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