Ku- UNIX , isixhumanisi esingokomfanekiso lapho ifayela elisereferensi elilodwa lisebenza njenge-pointer efayeleni kwesinye isiqondisi. Isibonelo, ungadala isixhumanisi ukuze wonke umuntu afinyelele kufayili / tmp / foo enze ngempela efayeleni / njll / passwd.
Yeka ukuthi izixhumanisi ezingokomfanekiso zingasetshenziswa kanjani
Lesi sici singavame ukusetshenziswa. Ngenkathi umsebenzisi ongenazimpande engenayo imvume yokubhalela kumafayela wokuphatha afana / / njll / passwd, angakwazi ukudala izixhumanisi kubo kumhlahlandlela we-tmp noma isiqondisi sendawo. I-SUID ingabe isetshenziswe lapho ikholelwa ukuthi isebenza efayeleni lomsebenzisi, okuyinto esikhundleni sayo isebenza kwifayela lokuqala lokuphatha. Lena yindlela ehamba phambili yokuthi abasebenzisi bendawo bangathuthukisa amalungelo abo ohlelweni. Isibonelo: umunwe Umsebenzisi angaxhuma ifayela labo .plan kunoma iyiphi enye ifayela ohlelweni. I-daemon yomunwe egijima ngamalungelo okumpande izobe ilandele isixhumanisi kuleyo fayela bese uyifunda ekusebenzisweni kokungena komunwe.