--- grant_privilege(id)
--- eid=(id)

    ¸桼 ID ѹޤ id ֤ޤ

    ¸桼 ID ѲϡProcess::UID.re_exchangeable? 
    true ɤǷޤ롥
    true ǤϤʤĶǤϡ¸桼 ID Ѳʤ
    true δĶǤϡid ¥桼 ID Ȱۤʤͤꤵ줿硤
    ¸桼 ID Ͽ¸桼 ID ͤꤵ롥
    Ǥʤ㳰ȯ롥

