{"id":119941,"date":"2024-09-25T15:43:10","date_gmt":"2024-09-25T13:43:10","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-openbsd-zapretili-ispolzovanie-nulevyh-simvolov-v-shell-skriptah"},"modified":"2024-09-25T15:43:10","modified_gmt":"2024-09-25T13:43:10","slug":"v-openbsd-zapretili-ispolzovanie-nulevyh-simvolov-v-shell-skriptah","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/v-openbsd-zapretili-ispolzovanie-nulevyh-simvolov-v-shell-skriptah","title":{"rendered":"I OpenBSD er brugen af null-tegn forbudt i shell-scripts","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Theo de Raadt har tilf\u00f8jet en \u00e6ndring, der forbyder brugen af null-karakteren i shell-scripts, der behandles af den standard brugte kommandotolk ksh. Tilstedev\u00e6relsen af null-karaktere i scripts vil nu f\u00f8re til en fejlmeddelelse ved udf\u00f8relse, undtagen i tilf\u00e6lde af at de findes blandt de data, der er vedh\u00e6ftet i slutningen af filen efter koden. \u00c6ndringen er inkluderet i OpenBSD-Current-grenen, som vil danne grundlag for udgivelsen af OpenBSD 7.6. <\/p>\n

Det bem\u00e6rkes, at en s\u00e5dan \u00e6ndring vil eliminere usikkerheden i opf\u00f8rslen relateret til behandlingen af null-karakteren i kode skrevet i C, hvor null-byte anvendes til at indikere slutningen af strenge. Unders\u00f8gelsen af behandlingen af null-karakteren i forskellige shells har vist, at der i hver af dem er blevet identificeret tilf\u00e6lde, hvor null-byte i inputdata eller indholdet af variabler har f\u00f8rt til adf\u00e6rd, der adskiller sig fra andre shells. Nogle shells ignorerede den, nogle erstattede den med et mellemrum, mens andre stoppede yderligere parsing af scriptet eller afsluttede dets udf\u00f8relse.
\n
Kilde: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0422\u044d\u043e \u0434\u0435 \u0420\u0430\u0430\u0434\u0442 (Theo de Raadt) \u0434\u043e\u0431\u0430\u0432\u0438\u043b \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0435, \u0437\u0430\u043f\u0440\u0435\u0449\u0430\u044e\u0449\u0435\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0441\u0438\u043c\u0432\u043e\u043b\u0430 \u0441 \u043d\u0443\u043b\u0435\u0432\u044b\u043c \u043a\u043e\u0434\u043e\u043c \u0432 shell-\u0441\u043a\u0440\u0438\u043f\u0442\u0430\u0445, \u043e\u0431\u0440\u0430\u0431\u0430\u0442\u044b\u0432\u0430\u0435\u043c\u044b\u0445 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u043c\u044b\u043c \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u043a\u043e\u043c\u0430\u043d\u0434\u043d\u044b\u043c \u0438\u043d\u0442\u0435\u0440\u043f\u0440\u0435\u0442\u0430\u0442\u043e\u0440\u043e\u043c ksh. \u041d\u0430\u043b\u0438\u0447\u0438\u0435 \u043d\u0443\u043b\u0435\u0432\u044b\u0445 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\u0432\u043a\u043b\u044e\u0447\u0435\u043d\u043e \u0432 \u0441\u043e\u0441\u0442\u0430\u0432 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-119941","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47I OpenBSD er brugen af null-karakterer i shell-scripts forbudt | ProHoster","description":"Theo de Raadt har tilf\u00f8jet en \u00e6ndring, der forbyder brugen af null-karakteren i shell-scripts, der behandles af den standard brugte kommandotolk 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