{"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\/de\/blog\/news\/v-openbsd-zapretili-ispolzovanie-nulevyh-simvolov-v-shell-skriptah","title":{"rendered":"In OpenBSD wurde die Verwendung von null-Zeichen in Shell-Skripten verboten","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Theo de Raadt hat eine \u00c4nderung hinzugef\u00fcgt, die die Verwendung des Nullzeichens in Shell-Skripten, die vom standardm\u00e4\u00dfig verwendeten BefehlInterpreter ksh verarbeitet werden, verboten hat. Das Vorhandensein von Nullzeichen in Skripten f\u00fchrt nun zu einem Abbruch der Ausf\u00fchrung mit einer Fehlermeldung, es sei denn, sie befinden sich unter den am Ende der Datei angeh\u00e4ngten Daten nach dem Code. Die \u00c4nderung ist in den OpenBSD-Current-Zweig aufgenommen worden, auf dessen Basis die OpenBSD-Version 7.6 erstellt wird. <\/p>\n

Es wird angemerkt, dass eine solche \u00c4nderung die Unbestimmtheit des Verhaltens ausschlie\u00dft, die mit der Verarbeitung des Nullzeichens im C-Code verbunden ist, der Strings verwendet, bei denen das Nullbyte zur Indikation des Endes der Zeichenfolge dient. Die Untersuchung der Behandlung des Nullzeichens in verschiedenen Shells hat gezeigt, dass in jeder von ihnen ein oder mehrere F\u00e4lle festgestellt wurden, in denen das Nullbyte in den Eingabedaten oder dem Inhalt von Variablen zu einem abweichenden Verhalten im Vergleich zu anderen Shells f\u00fchrte; beispielsweise ignorierten einige Shells es, einige ersetzten es durch ein Leerzeichen, w\u00e4hrend andere die weitere Analyse des Skripts abbrachen oder dessen Ausf\u00fchrung stoppten.
\n
Quelle: 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\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\udd47 In OpenBSD wurde die Verwendung von Nullzeichen in Shell-Skripten verboten | ProHoster","description":"Theo de Raadt hat eine \u00c4nderung hinzugef\u00fcgt, die die Verwendung des Nullzeichens in Shell-Skripten, die vom standardm\u00e4\u00dfig verwendeten BefehlInterpreter ksh verarbeitet werden, verboten 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