drop

An easy way for dropping privileges in Go.

import "github.com/sid77/drop"

// privileged code here
// ...

if err := drop.DropPrivileges("some user"); err != nil {
        log.Fatal(err)
}

// unprivileged code here
// ...

drop will take care of calling setre{s}[g,u]id() depending on the platform it's being run on.

Beware that if Go coroutines are created before dropping the program privileges, some of them may retain the original permissions. This is a limitation of the Go runtime itself.