Kyauta Mai Ƙididdige Izinin chmod

Yadda Yake Aiki

Wannan kayan aikin mai lissafta izinin Unix ne da aka rubuta da hannu, gaba ɗaya na gefen abokin ciniki — babu ɗakunan karatu, babu uwar garke. Yana tsara kowane izini a matsayin boolean a wani matrix na yanayin React kuma yana canjawa tsakanin tsari na octal, alama, da ls -l ta amfani da lissafin bitwise kai tsaye.

1. 1
   Matrix na akwatin dubawa yana saita yanayi

   Kowace daya daga cikin akwatin dubawa tara na karantawa/rubutawa/gudanarwa (mai, ƙungiya, wasu) yana sauya boolean a wani abu na yanayin React. Bits na musamman — setuid, setgid, da sticky — ana bin diddiginsu daban a wani abu na yanayin daban.
2. 2
   Lissafin bitwise yana lissafta octal

   Aikin octalFor() yana tara ƙimomin izini masu aiki don kowace ƙungiya ta amfani da nauyi tsayayye r=4, w=2, x=1. Ana haɗa lambobin ƙungiya guda uku, kuma idan an saita duk wani bit na musamman, ana sanya lamba ta huɗu ta jagora (setuid=4, setgid=2, sticky=1) a gaba.
3. 3
   Nazari na kowace alkibla yana daidaita duk shigarwa

   Buga lambar octal na haruffa 3 ko 4 yana kunna parseOctal(), wanda yake amfani da bitwise AND don raba kowace lamba baya zuwa boolean na izini kuma yana sabunta matrix na akwatin dubawa. Manna layin ls -l yana kunna parseLsPerms(), wanda yake amfani da na'ura mai fahimta don cire jerin izini na haruffa 9 kuma yana fassara haruffa na musamman kamar s, S, t, da T don setuid/setgid/sticky.
4. 4
   An haɗa umarnin chmod kuma an kwafi shi

   Ana gina ƙarshen umarnin chmod ta hanyar haɗa harafi — yanayin octal ko yanayin alama (tsarin u=rwx,g=rx,o=rx) — tare da zaɓin -R flag da sunan fayil na manufa. Danna Kwafi yana rubuta umarnin zuwa clipboard ta navigator.clipboard.writeText(), wanda yake gudana a wurin nan babu kiran sadarwa.

Kayan Aiki Masu Alaƙa