# File lib/thin/daemonizing.rb, line 59
    def change_privilege(user, group=user)
      log ">> Changing process privilege to #{user}:#{group}"
      
      uid, gid = Process.euid, Process.egid
      target_uid = Etc.getpwnam(user).uid
      target_gid = Etc.getgrnam(group).gid

      if uid != target_uid || gid != target_gid
        # Change process ownership
        Process.initgroups(user, target_gid)
        Process::GID.change_privilege(target_gid)
        Process::UID.change_privilege(target_uid)
      end
    rescue Errno::EPERM => e
      log "Couldn't change user and group to #{user}:#{group}: #{e}"
    end