{"id":41014,"date":"2020-02-05T10:07:45","date_gmt":"2020-02-05T07:07:45","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/vypusk-sistemnoj-biblioteki-glibc-2-31"},"modified":"2020-02-05T10:07:45","modified_gmt":"2020-02-05T07:07:45","slug":"vypusk-sistemnoj-biblioteki-glibc-2-31","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/vypusk-sistemnoj-biblioteki-glibc-2-31","title":{"rendered":"Uscita della libreria di sistema Glibc 2.31","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Dopo sei mesi di sviluppo <noindex><a rel=\"nofollow\" href=\"https:\/\/sourceware.org\/ml\/libc-alpha\/2020-02\/msg00010.html\">pubblicato<\/a><\/noindex> rilascio della libreria di sistema <noindex><a rel=\"nofollow\" href=\"http:\/\/ftp.gnu.org\/gnu\/glibc\/\">GNU C Library<\/a><\/noindex> (glibc) <noindex><a rel=\"nofollow\" href=\"http:\/\/sourceware.org\/glibc\/wiki\/Release\/2.31\">2.31<\/a><\/noindex>, che soddisfa pienamente i requisiti degli standard ISO C11 e POSIX.1-2008. La nuova versione include correzioni da 58 sviluppatori. <\/p>\n<p>Nella Glibc 2.31 sono state implementate <noindex><a rel=\"nofollow\" href=\"http:\/\/sourceware.org\/git\/?p=glibc.git;a=blob_plain;f=NEWS;hb=HEAD\">migliorie<\/a><\/noindex> si possono evidenziare:\n<\/p>\n<ul>\n<li class=\"l\"> Aggiunto il macro _ISOC2X_SOURCE per attivare le funzionalit\u00e0 definite nella bozza del futuro standard ISO <noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/C2x\">C2X<\/a><\/noindex>. Queste funzionalit\u00e0 sono attivate anche quando si utilizza il macro _GNU_SOURCE o durante la compilazione in gcc con il flag \u00ab-std=gnu2x\u00bb;\n<li class=\"l\"> Per alcune funzioni nel file di intestazione \u00abmath.h\u00bb che arrotondano i loro risultati a un tipo di dimensione inferiore, nel file \u00abtgmath.h\u00bb sono proposti i corrispondenti macro di tipo generico, come richiesto dalle specifiche TS 18661-1:2014 e TS 18661-3:2015;\n<li class=\"l\"> \u00c8 stata aggiunta la funzione pthread_clockjoin_np(), che attende la terminazione di un thread con un timeout (se il timeout scade prima della terminazione, la funzione restituir\u00e0 un errore). A differenza di <noindex><a rel=\"nofollow\" href=\"https:\/\/linux.die.net\/man\/3\/pthread_timedjoin_np\">pthread_timedjoin_np()<\/a><\/noindex>, in pthread_clockjoin_np() \u00e8 consentita la definizione del tipo di timer per calcolare il timeout \u2014 CLOCK_MONOTONIC (considera il tempo trascorso dal sistema in modalit\u00e0 sospesa) o CLOCK_REALTIME;\n<li class=\"l\"> Nel risolutore DNS \u00e8 stata aggiunta la supporto all'opzione trust-ad in \/etc\/resolv.conf e al flag RES_TRUSTAD in _res.options, che, se impostati, consentono la trasmissione del flag DNSSEC nelle richieste DNS. <noindex><a rel=\"nofollow\" href=\"https:\/\/tools.ietf.org\/html\/rfc3655\">AD<\/a><\/noindex> (dati autenticati). In questa modalit\u00e0, il flag AD impostato dal server diventa accessibile alle applicazioni che chiamano funzioni simili a res_search(). Per impostazione predefinita, se le opzioni suggerite non sono attivate, glibc non include il flag AD nelle richieste e lo cancella automaticamente nelle risposte, a indicare l'assenza di verifica DNSSEC.\n<li class=\"l\"> Per costruire i wrapper delle chiamate di sistema funzionanti per Glibc ora non \u00e8 necessaria l'installazione dei file header del kernel Linux. L'eccezione \u00e8 l'architettura RISC-V a 64 bit.\n<li class=\"l\"> Eliminato <noindex><a rel=\"nofollow\" href=\"https:\/\/bugzilla.redhat.com\/show_bug.cgi?id=CVE-2019-19126\">una vulnerabilit\u00e0<\/a><\/noindex> <noindex><a rel=\"nofollow\" href=\"https:\/\/security-tracker.debian.org\/tracker\/CVE-2019-19126\">CVE-2019-19126<\/a><\/noindex>, che consente di aggirare la protezione<br \/>\nASLR nei programmi con il flag setuid e determinare la disposizione degli indirizzi nelle librerie caricate attraverso la manipolazione della variabile d'ambiente LD_PREFER_MAP_32BIT_EXEC.<\/p>\n<\/ul>\n<p> Cambiamenti incompatibili:<\/p>\n<ul>\n<li class=\"l\"> In totalorder(), totalordermag() e funzioni simili per altri tipi a virgola mobile, ora accettano come argomento puntatori per escludere avvertimenti sulla conversione dei valori in stato <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/NaN\">NaN<\/a><\/noindex>, in conformit\u00e0 con le raccomandazioni TS 18661-1, proposte per il futuro standard C2X.<br \/>\nI file eseguibili esistenti, nei quali gli argomenti in virgola mobile sono passati direttamente, continueranno a funzionare senza modifiche;<\/p>\n<li class=\"l\"> La funzione obsoleta stime, annunciata da tempo, non \u00e8 pi\u00f9 disponibile per i file binari collegati a glibc e la sua definizione \u00e8 stata rimossa da time.h. Per impostare l'ora di sistema, si deve utilizzare la funzione clock_settime. \u00c8 previsto in futuro di rimuovere anche la funzione ftime, considerata obsoleta, insieme al file di intestazione sys\/timeb.h (si raccomanda di usare gettimeofday o clock_gettime al posto di ftime);\n<li class=\"l\"> La funzione gettimeofday ora non fornisce pi\u00f9 informazioni sul fuso orario di sistema (questa funzionalit\u00e0 era rilevante ai tempi del 4.2-BSD ed \u00e8 stata deprecata molti anni fa). Nel parametro 'tzp' ora deve essere passato un puntatore nullo, e per ottenere informazioni sul fuso orario in relazione all'ora corrente si deve usare la funzione localtime(). Quando si chiama gettimeofday con un argomento 'tzp' non nullo, i campi tz_minuteswest e tz_dsttime nella struttura timezone saranno restituiti vuoti. La funzione gettimeofday \u00e8 considerata deprecata in POSIX (si raccomanda di usare clock_gettime al posto di gettimeofday), ma non \u00e8 prevista la sua rimozione da glibc;\n<li class=\"l\"> Nella settimeofday \u00e8 stata interrotta la supporto per il passaggio simultaneo di parametri per impostare l'ora e la correzione del tempo. Quando si chiama settimeofday, uno degli argomenti (tempo o offset) deve ora necessariamente essere impostato a null, altrimenti la chiamata della funzione terminer\u00e0 con un errore EINVAL. Come gettimeofday, anche la funzione settimeofday \u00e8 considerata obsoleta in POSIX e si raccomanda di utilizzare la funzione clock_settime o la famiglia di funzioni adjtime.\n<li class=\"l\"> Support for SPARC ISA v7 architecture has been discontinued (support for v8 is still retained, but only for processors that support CAS instructions, such as LEON processors, but not SuperSPARC processors).\n<li class=\"l\"> In caso di errore di collegamento in modalit\u00e0\u00a0\u00ab<noindex><a rel=\"nofollow\" href=\"https:\/\/docs.oracle.com\/cd\/E23824_01\/html\/819-0690\/chapter3-7.html\">lazy<\/a><\/noindex>\u00bb, in cui il linker non cerca i simboli della funzione fino alla prima chiamata di questa funzione, la funzione dlopen ora termina forzatamente il processo (in precedenza veniva restituito NULL in caso di errore);\n<li class=\"l\"> Per ABI MIPS hard-float ora viene utilizzato uno stack esecutivo, se durante la compilazione non \u00e8 esplicitamente impostato un vincolo sull'utilizzo del kernel Linux 4.8+ tramite il parametro \u00ab--enable-kernel=4.8.0\u00bb (con i kernel fino al 4.8 si verificano errori per alcune configurazioni MIPS);\n<li class=\"l\"> Wrappers over system calls related to time manipulation have been switched to using the time64 system call when available (on 32-bit glibc systems, it first attempts to use new system calls manipulating the 64-bit type for time, and if they are not present, falls back to the old 32-bit calls).\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Fonte: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52293\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0441\u043b\u0435 \u0448\u0435\u0441\u0442\u0438 \u043c\u0435\u0441\u044f\u0446\u0435\u0432 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u043e\u0439 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 GNU C Library (glibc) 2.31, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u043e\u043b\u043d\u043e\u0441\u0442\u044c\u044e \u0441\u043b\u0435\u0434\u0443\u0435\u0442 \u0442\u0440\u0435\u0431\u043e\u0432\u0430\u043d\u0438\u044f\u043c \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043e\u0432 ISO C11 \u0438 POSIX.1-2008. \u0412 \u0441\u043e\u0441\u0442\u0430\u0432 \u043d\u043e\u0432\u043e\u0433\u043e \u0432\u044b\u043f\u0443\u0441\u043a\u0430 \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u044b \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u043e\u0442 58 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432. \u0418\u0437 \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u0432 Glibc 2.31 \u0443\u043b\u0443\u0447\u0448\u0435\u043d\u0438\u0439 \u043c\u043e\u0436\u043d\u043e \u043e\u0442\u043c\u0435\u0442\u0438\u0442\u044c: \u0414\u043e\u0431\u0430\u0432\u043b\u0435\u043d \u043c\u0430\u043a\u0440\u043e\u0441 _ISOC2X_SOURCE \u0434\u043b\u044f \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u0435\u0439, \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u044b\u0445 \u0432 \u0447\u0435\u0440\u043d\u043e\u0432\u043e\u043c \u0432\u0430\u0440\u0438\u0430\u043d\u0442\u0435 \u0431\u0443\u0434\u0443\u0449\u0435\u0433\u043e \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u0430 ISO C2X. \u0414\u0430\u043d\u043d\u044b\u0435 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u0438 [&hellip;]<\/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":[],"tags":[],"class_list":["post-41014","post","type-post","status-publish","format-standard","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041f\u043e\u0441\u043b\u0435 \u0448\u0435\u0441\u0442\u0438 \u043c\u0435\u0441\u044f\u0446\u0435\u0432 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u043e\u0439 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 GNU C Library (glibc) 2.31, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u043e\u043b\u043d\u043e\u0441\u0442\u044c\u044e 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\u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"\ud83e\udd47\u0412\u044b\u043f\u0443\u0441\u043a \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u043e\u0439 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 Glibc 2.31 | ProHoster\" \/>\n\t\t<meta property=\"og:description\" content=\"\u041f\u043e\u0441\u043b\u0435 \u0448\u0435\u0441\u0442\u0438 \u043c\u0435\u0441\u044f\u0446\u0435\u0432 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u043e\u0439 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 GNU C Library (glibc) 2.31, 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content=\"350\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2020-02-05T07:07:45+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2020-02-05T07:07:45+00:00\" \/>\n\t\t<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"\ud83e\udd47Release della libreria di sistema Glibc 2.31 | ProHoster","description":"Dopo sei mesi di sviluppo, \u00e8 stata pubblicata la release della libreria di sistema GNU C Library (glibc) 2.31, che segue completamente i requisiti degli standard ISO C11 e POSIX.1-2008. La nuova versione include correzioni da 58 sviluppatori. Tra i miglioramenti implementati in Glibc 2.31, si segnala: \u00e8 stato aggiunto il macro _ISOC2X_SOURCE per abilitare le funzionalit\u00e0 definite nella bozza del futuro standard ISO C2X. Queste funzionalit\u00e0","canonical_url":"https:\/\/prohoster.info\/it\/blog\/vypusk-sistemnoj-biblioteki-glibc-2-31","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"it_IT","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u0412\u044b\u043f\u0443\u0441\u043a \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u043e\u0439 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 Glibc 2.31 | ProHoster","og:description":"\u041f\u043e\u0441\u043b\u0435 \u0448\u0435\u0441\u0442\u0438 \u043c\u0435\u0441\u044f\u0446\u0435\u0432 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u043e\u0439 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 GNU C Library (glibc) 2.31, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u043e\u043b\u043d\u043e\u0441\u0442\u044c\u044e \u0441\u043b\u0435\u0434\u0443\u0435\u0442 \u0442\u0440\u0435\u0431\u043e\u0432\u0430\u043d\u0438\u044f\u043c \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043e\u0432 ISO C11 \u0438 POSIX.1-2008. \u0412 \u0441\u043e\u0441\u0442\u0430\u0432 \u043d\u043e\u0432\u043e\u0433\u043e \u0432\u044b\u043f\u0443\u0441\u043a\u0430 \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u044b \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u043e\u0442 58 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432. \u0418\u0437 \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u0432 Glibc 2.31 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