golang exec.Command returns exit status 1 with bash

Question

I am trying to run multiple commands using bash -c in exec.Command, when i manually run the command, it returns no error the output of command is nil but it's okay. I don't know why it returns exit status 1 when i run it through golang exec.Command.

Here is my code :

cmd := exec.Command("bash", "-c", "blkid -o device | grep -v part | grep /dev/mapper")
_ = cmd.Wait()
stdout, err := cmd.Output()

I even tried this answer from another question, but it also didn't worked out. The important thing is that when i run command on a vm where output is not nil the command executes successfully, but when i tried this on Centos where output is nil it failed.

@Inian i need to run command in one line, and have to keep the code simple — Kashif Khan
– Kashif Khan, Commented Jun 3, 2021 at 8:02

bjrnt · Accepted Answer · 2022-06-28 22:13:12Z

1

This is because you have to pass the command in the string slice. Use this instead -

cmd := exec.Command("bash",strings.Fields("-c blkid -o device | grep -v part | grep /dev/mapper"))
stdout, err := cmd.Output()

edited Jun 28, 2022 at 22:13

bjrnt

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answered Jun 6, 2021 at 11:25

Roshan Patil

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2 Comments

Kashif Khan Over a year ago

cannot use type [] string as type string

Roshan Patil Over a year ago

@KashifKhan0771 Sorry my bad, I have updated my answer. Please have a look

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