Running external commands through os/exec under another user

exec, go, sudo

Solution

You can add a syscall.Credential struct to Cmd.SysProcAttr

cmd := exec.Command(command, args...)
cmd.SysProcAttr = &syscall.SysProcAttr{}
cmd.SysProcAttr.Credential = &syscall.Credential{Uid: uid, Gid: gid}

Problem

Using the `os/exec` package, I want to run an external command on a *nix OS, on behalf of another user (of course go process run under root user of another user with su privileges) I want avoid "su" or "bash" commands and make it purely with go. I made an approach using `syscall.Setuid` but this will change the user to the main project, I just need change the user to the external child process: ``` func (self *Command) LoseTo(username string) { u, err := user.Lookup(username) if err != nil { fmt.Printf("%v", err) } uid, err := strconv.Atoi(u.Uid) if err := syscall.Setuid(uid); err != nil { fmt.Printf("%v", err) } } ```

Original source