{"id":104906,"date":"2022-08-21T15:36:41","date_gmt":"2022-08-21T13:36:41","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-standartnoj-si-biblioteki-cosmopolitan-2-0-razvivaemoj-dlya-perenosimyh-ispolnyaemyh-fajlov"},"modified":"2022-08-21T15:36:41","modified_gmt":"2022-08-21T13:36:41","slug":"vypusk-standartnoj-si-biblioteki-cosmopolitan-2-0-razvivaemoj-dlya-perenosimyh-ispolnyaemyh-fajlov","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/vypusk-standartnoj-si-biblioteki-cosmopolitan-2-0-razvivaemoj-dlya-perenosimyh-ispolnyaemyh-fajlov","title":{"rendered":"A Cosmopolitan 2.0 standard C k\u00f6nyvt\u00e1r kiad\u00e1sa, amelyet hordozhat\u00f3 v\u00e9grehajthat\u00f3 f\u00e1jlokhoz fejlesztenek.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Megjelent a Cosmopolitan 2.0 projekt kiad\u00e1sa, amely a standard C k\u00f6nyvt\u00e1rat \u00e9s egy egyetemes futtathat\u00f3 f\u00e1jlform\u00e1tumot fejleszt, amelyet k\u00fcl\u00f6nb\u00f6z\u0151 oper\u00e1ci\u00f3s rendszerek sz\u00e1m\u00e1ra lehet haszn\u00e1lni k\u00f6zvet\u00edt\u0151k \u00e9s virtu\u00e1lis g\u00e9pek n\u00e9lk\u00fcl. A GCC \u00e9s Clang seg\u00edts\u00e9g\u00e9vel t\u00f6rt\u00e9n\u0151 ford\u00edt\u00e1ssal el\u0151\u00e1ll\u00edtott eredm\u00e9ny egy statikusan linkelhet\u0151 univerz\u00e1lis futtathat\u00f3 f\u00e1jlba ker\u00fcl, amely b\u00e1rmely Linux, macOS, Windows, FreeBSD, OpenBSD, NetBSD disztrib\u00faci\u00f3ban elind\u00edthat\u00f3, s\u0151t BIOS-b\u00f3l is h\u00edvhat\u00f3. A projekt k\u00f3dj\u00e1t ISC licenc alatt terjesztik (a MIT\/BSD egyszer\u0171s\u00edtett v\u00e1ltozata).         <\/p>\n<p>A univerz\u00e1lis v\u00e9grehajthat\u00f3 f\u00e1jlok l\u00e9trehoz\u00e1s\u00e1ra szolg\u00e1l\u00f3 kont\u00e9ner a k\u00fcl\u00f6nb\u00f6z\u0151 oper\u00e1ci\u00f3s rendszerekhez egyedi szegmensek \u00e9s fejl\u00e9cek (PE, ELF, MACHO, OPENBSD) kombin\u00e1l\u00e1s\u00e1n alapul egyetlen f\u00e1jlban, \u00edgy t\u00f6bb k\u00fcl\u00f6nb\u00f6z\u0151 form\u00e1tumot \u00f6tv\u00f6z, amelyeket a Unix, Windows \u00e9s macOS rendszerek haszn\u00e1lnak. Annak \u00e9rdek\u00e9ben, hogy egy v\u00e9grehajthat\u00f3 f\u00e1jl futtathat\u00f3 legyen Windows \u00e9s Unix rendszerekben, egy tr\u00fckk\u00f6t alkalmaznak, amely a Windows PE f\u00e1jlok shell-scriptk\u00e9nt val\u00f3 k\u00f3dol\u00e1s\u00e1val kapcsolatos, kihaszn\u00e1lva, hogy a Thompson Shell nem haszn\u00e1lja a \u201e#!\u201d script jel\u00f6l\u0151t. Olyan programok l\u00e9trehoz\u00e1s\u00e1hoz, amelyek t\u00f6bb f\u00e1jlt tartalmaznak (minden er\u0151forr\u00e1s egy f\u00e1jlba val\u00f3 \u00f6sszekever\u00e9s\u00e9t), t\u00e1mogatott a v\u00e9grehajthat\u00f3 f\u00e1jl el\u0151\u00e1ll\u00edt\u00e1sa egy k\u00fcl\u00f6nlegesen form\u00e1zott ZIP-arch\u00edvumk\u00e9nt. Az aj\u00e1nlott form\u00e1tum s\u00e9ma (p\u00e9lda alkalmaz\u00e1s hello.com):        <\/p>\n<p>     MZqFpD=&#8217;     BIOS BOOT SECTOR&#8217;     exec 7 $(command -v $0)     printf &#8216;&#092;177ELF&#8230;LINKER-ENCODED-FREEBSD-HEADER&#8217; &gt;&#038;7     exec &#171;$0&#187; &#171;$@&#187;     exec qemu-x86_64 &#171;$0&#187; &#171;$@&#187;     exit 1     REAL MODE&#8230;     ELF SEGMENTS&#8230;     OPENBSD NOTE&#8230;     MACHO HEADERS&#8230;     CODE AND DATA&#8230;     ZIP DIRECTORY&#8230;      <\/p>\n<p>A f\u00e1jl elej\u00e9n a &#171;MZqFpD&#187; c\u00edmke szerepel, amely a Windows PE form\u00e1tum fejl\u00e9cek\u00e9nt van \u00e9rtelmezve. Ez a szekvencia szint\u00e9n dek\u00f3dolva van a &#171;pop %r10 ; jno 0x4a ; jo 0x4a&#187; utas\u00edt\u00e1sban, m\u00edg a &#171;&#092;177ELF&#187; sor a &#171;jg 0x47&#187; utas\u00edt\u00e1sra, amelyeket a bel\u00e9p\u00e9si pontra val\u00f3 ugr\u00e1shoz haszn\u00e1lnak. Unix rendszerekben shell-k\u00f3d fut, amely az exec parancsot haszn\u00e1lja az v\u00e9grehajtand\u00f3 k\u00f3d anonim cs\u00f6v\u00f6n kereszt\u00fcli tov\u00e1bb\u00edt\u00e1s\u00e1ra. Az aj\u00e1nlott m\u00f3dszer korl\u00e1toz\u00e1sa, hogy Unix-alap\u00fa oper\u00e1ci\u00f3s rendszerekben csak azokkal a shell-ekkel lehet futtatni, amelyek t\u00e1mogatj\u00e1k a Thompson Shell kompatibilit\u00e1si m\u00f3dj\u00e1t.       <\/p>\n<p>A qemu-x86_64 h\u00edv\u00e1st a tov\u00e1bbi hordozhat\u00f3s\u00e1g megval\u00f3s\u00edt\u00e1s\u00e1ra tervezt\u00e9k, \u00e9s lehet\u0151v\u00e9 teszi az x86_64 architekt\u00far\u00e1ra leford\u00edtott k\u00f3d futtat\u00e1s\u00e1t olyan platformokon, amelyek k\u00fcl\u00f6nb\u00f6znek az x86-t\u00f3l, p\u00e9ld\u00e1ul Raspberry Pi alaplapokon \u00e9s ARM processzorral rendelkez\u0151 Apple eszk\u00f6z\u00f6k\u00f6n. A projekt emellett felhaszn\u00e1lhat\u00f3 \u00f6n\u00e1ll\u00f3 alkalmaz\u00e1sok l\u00e9trehoz\u00e1s\u00e1ra, amelyek oper\u00e1ci\u00f3s rendszer n\u00e9lk\u00fcl m\u0171k\u00f6dnek (bare metal). Az ilyen alkalmaz\u00e1sokhoz egy bet\u00f6lt\u0151programot csatolnak az v\u00e9grehajthat\u00f3 f\u00e1jlhoz, m\u00edg a program a bet\u00f6ltend\u0151 oper\u00e1ci\u00f3s rendszer szerep\u00e9t t\u00f6lti be.         <\/p>\n<p>A projekt \u00e1ltal kifejlesztett standard C k\u00f6nyvt\u00e1rban, a libc-ben 2024 funkci\u00f3 tal\u00e1lhat\u00f3 (az els\u0151 kiad\u00e1sban k\u00f6r\u00fclbel\u00fcl 1400 funkci\u00f3 volt). Teljes\u00edtm\u00e9ny szempontj\u00e1b\u00f3l a Cosmopolitan olyan gyorsan m\u0171k\u00f6dik, mint a glibc, \u00e9s l\u00e9nyegesen megel\u0151zi a Musl-t \u00e9s a Newlib-et, mik\u00f6zben a Cosmopolitan k\u00f3dm\u00e9rete nagys\u00e1grenddel kisebb, mint a glibc \u00e9s k\u00f6r\u00fclbel\u00fcl megfelel a Musl-nak \u00e9s a Newlib-nek. Az olyan gyakran h\u00edvott funkci\u00f3k, mint a memcpy \u00e9s strlen optimaliz\u00e1l\u00e1s\u00e1ra, tov\u00e1bbi \u201etrickle-down performance\u201d technik\u00e1t alkalmaznak, amelyben a funkci\u00f3h\u00edv\u00e1s sor\u00e1n egy makr\u00f3-wrappert alkalmaznak, amellyel a ford\u00edt\u00f3 \u00e9rtes\u00fcl a v\u00e9grehajt\u00e1s sor\u00e1n haszn\u00e1lt CPU regiszterekr\u0151l, ez lehet\u0151v\u00e9 teszi az er\u0151forr\u00e1sok megtakar\u00edt\u00e1s\u00e1t a CPU \u00e1llapot\u00e1nak fenntart\u00e1sakor azzal, hogy csak a v\u00e1ltoz\u00f3 regisztereket mentik el.    <\/p>\n<p>A leg\u00fajabb verzi\u00f3ban bek\u00f6vetkezett v\u00e1ltoz\u00e1sok:  <\/p>\n<ul>\n<li class=\"l\"> Megv\u00e1ltozott a bels\u0151 er\u0151forr\u00e1sok el\u00e9r\u00e9s\u00e9nek s\u00e9m\u00e1ja a zip f\u00e1jlokban (f\u00e1jlok megnyit\u00e1sakor mostant\u00f3l norm\u00e1l \u00fatvonalak \\\/zip\\\/\u2026 haszn\u00e1lata t\u00f6rt\u00e9nik a zip:.. prefix haszn\u00e1lata helyett). Hasonl\u00f3k\u00e9ppen a Windows lemezek el\u00e9r\u00e9s\u00e9re lehet\u0151s\u00e9g ny\u00edlik az olyan t\u00edpus\u00fa \u00fatvonalak haszn\u00e1lat\u00e1ra, mint &#171;\\\/c\\\/\u2026&#187; a &#171;C:\\\/\u2026&#187; helyett.\n<li class=\"l\"> \u00daj APE (Actually Portable Executable) bet\u00f6lt\u0151programot javasoltak, amely meghat\u00e1rozza az univerz\u00e1lis v\u00e9grehajthat\u00f3 f\u00e1jlok form\u00e1tum\u00e1t. Az \u00faj bet\u00f6lt\u0151program mmap-ot haszn\u00e1l a program mem\u00f3riahely\u00e9nek elk\u00fcl\u00f6n\u00edt\u00e9s\u00e9re, \u00e9s m\u00e1r nem m\u00f3dos\u00edtja a tartalmat fut\u00e1s k\u00f6zben. Sz\u00fcks\u00e9g eset\u00e9n az univerz\u00e1lis v\u00e9grehajthat\u00f3 f\u00e1jl hagyom\u00e1nyos v\u00e9grehajthat\u00f3 f\u00e1jlokk\u00e1 alak\u00edthat\u00f3, amelyek egyes platformokhoz vannak k\u00f6tve.\n<li class=\"l\"> Linux platformon megval\u00f3s\u00edtott\u00e1k a binfmt_misc kernel modul haszn\u00e1lat\u00e1t az APE programok futtat\u00e1s\u00e1hoz. Megjegyzik, hogy a binfmt_misc haszn\u00e1lata a leggyorsabb m\u00f3dszer a futtat\u00e1sra.\n<li class=\"l\"> Linux alatt implement\u00e1lt\u00e1k a pledge() \u00e9s unveil() rendszerh\u00edv\u00e1sok funkcionalit\u00e1s\u00e1t, amelyet az OpenBSD projekt fejleszt. API \u00e1ll rendelkez\u00e9sre ezeknek a h\u00edv\u00e1soknak a haszn\u00e1lat\u00e1hoz C, C++, Python \u00e9s Redbean nyelveken, valamint a pledge.com seg\u00e9dprogram, amely lehet\u0151v\u00e9 teszi tetsz\u0151leges folyamatok izol\u00e1l\u00e1s\u00e1t.\n<li class=\"l\"> A ford\u00edt\u00e1shoz a Landlock Make eszk\u00f6zt haszn\u00e1lj\u00e1k \u2014 a GNU Make egy verzi\u00f3ja, amely szigor\u00fabb f\u00fcgg\u0151s\u00e9gi ellen\u0151rz\u00e9ssel \u00e9s a Landlock rendszerh\u00edv\u00e1s haszn\u00e1lat\u00e1val izol\u00e1lja a programot a t\u00f6bbi rendszert\u0151l, n\u00f6velve ezzel a gyors\u00edt\u00f3t\u00e1r hat\u00e9konys\u00e1g\u00e1t. Opci\u00f3k\u00e9nt a hagyom\u00e1nyos GNU Make ford\u00edt\u00e1si lehet\u0151s\u00e9ge is megmaradt.\n<li class=\"l\"> Megval\u00f3s\u00edt\u00e1sra ker\u00fcltek a t\u00f6bb sz\u00e1l\u00fa v\u00e9grehajt\u00e1shoz sz\u00fcks\u00e9ges _spawn() \u00e9s _join() funkci\u00f3k, amelyek \u00e1ltal\u00e1nos burkolatok k\u00fcl\u00f6nb\u00f6z\u0151 oper\u00e1ci\u00f3s rendszerek API-jai f\u00f6l\u00f6tt. Tov\u00e1bb\u00e1 folyamatban van a POSIX Threads t\u00e1mogat\u00e1s\u00e1nak megval\u00f3s\u00edt\u00e1sa.\n<li class=\"l\"> Lehet\u0151s\u00e9g ny\u00edlik a _Thread_local kulcssz\u00f3 haszn\u00e1lat\u00e1ra, amely lehet\u0151v\u00e9 teszi az egyes sz\u00e1lakhoz k\u00fcl\u00f6n t\u00e1rol\u00f3k haszn\u00e1lat\u00e1t (TLS, Thread-Local Storage). Alap\u00e9rtelmez\u00e9s szerint a C fut\u00e1si k\u00f6rnyezet inicializ\u00e1lja a TLS-t az alap sz\u00e1lhoz, ami a v\u00e9grehajthat\u00f3 f\u00e1jl minim\u00e1lis m\u00e9ret\u00e9nek 12-r\u0151l 16 KB-ra emelked\u00e9s\u00e9t eredm\u00e9nyezte.\n<li class=\"l\"> A v\u00e9grehajthat\u00f3 f\u00e1jlokba be\u00e9p\u00edt\u00e9sre ker\u00fclt a &#171;&#8212;ftrace&#187; \u00e9s &#171;&#8212;strace&#187; param\u00e9terek t\u00e1mogat\u00e1sa a funkci\u00f3- \u00e9s rendszerh\u00edv\u00e1sok \u00f6sszes h\u00edv\u00e1s\u00e1nak stderr-re t\u00f6rt\u00e9n\u0151 ki\u00edr\u00e1s\u00e1hoz.\n<li class=\"l\"> T\u00e1mogat\u00e1s ker\u00fclt bevezet\u00e9sre a closefrom() rendszerh\u00edv\u00e1s sz\u00e1m\u00e1ra, amely a Linux 5.9+, FreeBSD 8+ \u00e9s OpenBSD rendszerekben el\u00e9rhet\u0151.\n<li class=\"l\"> A Linux platformon a clock_gettime \u00e9s gettimeofday h\u00edv\u00e1sok teljes\u00edtm\u00e9ny\u00e9t ak\u00e1r 10-szeres\u00e9re n\u00f6velt\u00e9k a vDSO (virtu\u00e1lis dinamikus megosztott objektum) mechanizmus haszn\u00e1lat\u00e1val, amely lehet\u0151v\u00e9 teszi a rendszerh\u00edv\u00e1s kezel\u0151j\u00e9nek felhaszn\u00e1l\u00f3i t\u00e9rbe helyez\u00e9s\u00e9t, elker\u00fclve a kontextusv\u00e1lt\u00e1sokat.\n<li class=\"l\"> A Musl k\u00f6nyvt\u00e1rb\u00f3l \u00e1thelyeztek matematikai f\u00fcggv\u00e9nyeket a komplex sz\u00e1mok kezel\u00e9s\u00e9re. Sz\u00e1mos matematikai f\u00fcggv\u00e9ny m\u0171k\u00f6d\u00e9se felgyorsult.\n<li class=\"l\"> Javasolt egy nointernet() f\u00fcggv\u00e9ny, amely letiltja a h\u00e1l\u00f3zati funkci\u00f3kat.\n<li class=\"l\"> \u00daj f\u00fcggv\u00e9nyek ker\u00fcltek bevezet\u00e9sre a hat\u00e9kony sz\u00f6vegcsatol\u00e1shoz: appendd, appendf, appendr, appends, appendw, appendz, kappendf, kvappendf \u00e9s vappendf.\n<li class=\"l\"> Hozz\u00e1ad\u00f3dott egy v\u00e9dett v\u00e1ltozata a kprintf() f\u00fcggv\u00e9nycsal\u00e1dnak, amely emelt jogosults\u00e1gok mellett val\u00f3 munk\u00e1ra lett tervezve.\n<li class=\"l\"> Jelent\u0151sen n\u00f6velt\u00e9k a megval\u00f3s\u00edt\u00e1sok teljes\u00edtm\u00e9ny\u00e9t <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/hu\/ssl-sertifikat\/\"   title=\"SSL\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2309\">SSL<\/a>, SHA, curve25519 \u00e9s RSA.      <\/ul>\n<p>Forr\u00e1s: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=57663\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0432\u044b\u043f\u0443\u0441\u043a \u043f\u0440\u043e\u0435\u043a\u0442\u0430 Cosmopolitan 2.0, \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u044e\u0449\u0435\u0433\u043e \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043d\u0443\u044e \u0421\u0438-\u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0443 \u0438 \u0443\u043d\u0438\u0432\u0435\u0440\u0441\u0430\u043b\u044c\u043d\u044b\u0439 \u0444\u043e\u0440\u043c\u0430\u0442 \u0438\u0441\u043f\u043e\u043b\u043d\u044f\u0435\u043c\u044b\u0445 \u0444\u0430\u0439\u043b\u043e\u0432, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043c\u043e\u0436\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0434\u043b\u044f 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