Test program to show user namespace POC in go

testuserns.go

package main

import (
        "log"
        "os"
        "os/exec"
        "syscall"
)

func main() {
        cmd := exec.Command("/bin/sh")
        cmd.SysProcAttr = &syscall.SysProcAttr{}
        cmd.SysProcAttr.Cloneflags = syscall.CLONE_NEWUSER | syscall.CLONE_NEWNS | syscall.CLONE_NEWUTS | syscall.CLONE_NEWPID | syscall.CLONE_NEWIPC | syscall.CLONE_NEWNET
        cmd.SysProcAttr.Credential = &syscall.Credential{
                Uid: 0,
                Gid: 0,
                UidMappings: "0 1000 1",
                GidMappings: "0 1000 1",
        }

        cmd.Stdin = os.Stdin
        cmd.Stderr = os.Stderr
        cmd.Stdout = os.Stdout

        if err := cmd.Start(); err != nil {
                log.Fatalf("Failed to start command: %s", err)
        }

        log.Println("Command started")

        if err := cmd.Wait(); err != nil {
                if _, ok := err.(*exec.ExitError); !ok {
                        log.Fatalf("Failed to exit: %s", err)
                }
        }
}