{"id":44429,"date":"2024-01-09T08:05:46","date_gmt":"2023-09-04T15:51:01","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e6%83%b3%e5%9c%a8golang%e4%b8%ad%e8%bf%90%e8%a1%8cclonefile%e2%86%92%e5%b0%9d%e8%af%95%e5%8f%91%e5%87%ba%e7%b3%bb%e7%bb%9f%e8%b0%83%e7%94%a8\/"},"modified":"2024-05-04T17:29:02","modified_gmt":"2024-05-04T09:29:02","slug":"%e6%88%91%e6%83%b3%e5%9c%a8golang%e4%b8%ad%e8%bf%90%e8%a1%8cclonefile%e2%86%92%e5%b0%9d%e8%af%95%e5%8f%91%e5%87%ba%e7%b3%bb%e7%bb%9f%e8%b0%83%e7%94%a8","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e6%83%b3%e5%9c%a8golang%e4%b8%ad%e8%bf%90%e8%a1%8cclonefile%e2%86%92%e5%b0%9d%e8%af%95%e5%8f%91%e5%87%ba%e7%b3%bb%e7%bb%9f%e8%b0%83%e7%94%a8\/","title":{"rendered":"\u6211\u60f3\u5728Golang\u4e2d\u8fd0\u884cclonefile\u2192\u5c1d\u8bd5\u53d1\u51fa\u7cfb\u7edf\u8c03\u7528"},"content":{"rendered":"

\u9996\u5148\uff0c<\/h1>\n

\u53bb\u5e74\u5e74\u5e95\uff082018\u5e74\u672b\uff09\uff0c\u5728\u6211\u7684\u5de5\u4f5c\u573a\u6240\u4e5f\u6709\u4eba\u8c08\u8bbaMac\u7684cp\u547d\u4ee4\u7684\u9009\u9879\u3002
\n\u6700\u8fd1\u7684macOS\u636e\u8bf4\u53ef\u4ee5\u5728\u77ac\u95f4\u590d\u5236\u6587\u4ef6\u3002<\/p>\n

\u5728APFS\uff08Apple\u6587\u4ef6\u7cfb\u7edf\uff09\u4e2d\uff0c\u5982\u679c\u5728cp\u547d\u4ee4\u4e2d\u6307\u5b9a-c\u9009\u9879\uff0c\u5b83\u5c06\u4f7f\u7528clonefile\u7cfb\u7edf\u8c03\u7528\uff0c\u56e0\u6b64\u53ef\u4ee5\u5728\u77ac\u95f4\u5185\u590d\u5236\u51e0GB\u7ea7\u522b\u7684\u6587\u4ef6\u3002<\/p>\n

\u7136\u540e\uff0c\u6211\u60f3\u8981\u7528Golang\u7f16\u5199\u4e00\u4e2a\u4f7f\u7528clonefile\u51fd\u6570\u8fdb\u884c\u6587\u4ef6\u590d\u5236\u7684\u5de5\u5177\u3002<\/p>\n

\u7279\u522b\u662f\u6709\u7ecf\u9a8c\u7684\u4eba\u53ef\u4ee5\u76f4\u63a5\u8bbf\u95ee\u94fe\u63a5\uff1ahttps:\/\/github.com\/n-someya\/goclonefile\u3002<\/p>\n

\u5728Golang\u4e2d\u7528\u4e8e\u53d1\u51fa\u7cfb\u7edf\u8c03\u7528\u7684\u8f6f\u4ef6\u5305<\/h1>\n

\u5728Golang\u4e2d\uff0c\u7cfb\u7edf\u8c03\u7528\u53d1\u884c\u7684\u5305\u6709\u4e24\u4e2a\u5b58\u5728\u7740\u5386\u53f2\u539f\u56e0\u3002
\nsyscall\u5305\u662fGolang\u7684\u6807\u51c6\u5305\uff0c\u63d0\u4f9b\u4e86\u7528\u4e8e\u53d1\u884c\u7cfb\u7edf\u8c03\u7528\u7684\u529f\u80fd\u3002
\n\u7136\u800c\uff0c\u7531\u4e8e\u4e00\u7cfb\u5217\u95ee\u9898\uff0c\u5982\u5bf9\u4e0d\u540c\u64cd\u4f5c\u7cfb\u7edf\u7684\u7279\u5b9a\u652f\u6301\u7b49\uff0c\u76ee\u524d\u529f\u80fd\u7684\u589e\u52a0\u5df2\u7ecf\u8f6c\u79fb\u5230\u4e86golang.org\/x\/sys\u5305\u4e2d\u3002<\/p>\n

\u5efa\u8bae\u67e5\u770b golang.org\/x\/sys\/unix \u5305\uff0c\u56e0\u4e3a clonefile \u7cfb\u7edf\u8c03\u7528\u662f macOS \u7684\u7279\u6709\u529f\u80fd\uff08macOS \u662f\u57fa\u4e8e Unix \u7684\uff09\u3002<\/p>\n

\u5728Unix\u7cfb\u7edf\u4e2d\uff0c\u6bcf\u4e2a\u7cfb\u7edf\u8c03\u7528\u90fd\u88ab\u5206\u914d\u4e86\u4e00\u4e2a\u7279\u5b9a\u7684\u7f16\u53f7\u3002\u6307\u5b9a\u4e86\u6bcf\u4e2a\u7cfb\u7edf\u8c03\u7528\u88ab\u5206\u914d\u7684\u7f16\u53f7\u7684\u6587\u4ef6\u662fzsysnum_darwin_amd64.go\u3002<\/p>\n

const<\/span> (<\/span>\r\n\/\/\u4e2d\u7565<\/span>\r\n    SYS_CLONEFILEAT<\/span>                    =<\/span> 462<\/span>\r\n\/\/\u4e2d\u7565<\/span>\r\n)<\/span>\r\n<\/code><\/pre>\n
\u5728\u5176\u4e2d\u8fd8\u8bb0\u8f7d\u4e86clonefile\u7cfb\u7edf\u8c03\u7528\u7684\u53f7\u7801\u3002
\n\u8fd9\u542c\u8d77\u6765\u5f88\u6709\u5e0c\u671b\u3002<\/p>\n
\u4f7f\u7528\u4e0a\u8ff0\u7684\u5e38\u91cf\uff0c\u5b9e\u9645\u4e0a\u53d1\u8d77\u4e86\u7cfb\u7edf\u8c03\u7528\u7684\u6587\u4ef6\u4e3azsyscall_darwin_amd64.1_11.go\u3002<\/p>\n
\u7136\u800c\uff0c\u65e0\u8bba\u5728\u54ea\u91cc\u90fd\u627e\u4e0d\u5230\u4f7f\u7528SYS_CLONEFILEAT\u7684\u90e8\u5206…
\n\u770b\u8d77\u6765\u6ca1\u6709\u5b9e\u65bd…<\/p>\n
\u7528Go\u8bed\u8a00\u5b9e\u73b0clonefile\u7cfb\u7edf\u8c03\u7528\u7684\u53d1\u51fa\u5904\u7406<\/h1>\n
\u56e0\u4e3a\u6ca1\u6709\u529e\u6cd5\uff0c\u53ea\u80fd\u81ea\u5df1\u6765\u5b9e\u73b0\u3002<\/p>\n
\u6839\u636eApple\u7684\u8bf4\u6cd5\uff0cclonefile\u7cfb\u7edf\u8c03\u7528\uff08\u51c6\u786e\u5730\u8bf4\u662fclonefileat\u7cfb\u7edf\u8c03\u7528\uff09\u63a5\u53d75\u4e2a\u53c2\u6570\u3002<\/p>\n
\n
\u5f15\u6570\u30d1\u30e9\u30e1\u30fc\u30bf1\u7b2c2\u5f15\u6570\u304c\u76f8\u5bfe\u30d1\u30b9\u306e\u5834\u5408\u306e\u30ab\u30ec\u30f3\u30c8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf2\u30b3\u30d4\u30fc\u5143<\/strong>\u30d5\u30a1\u30a4\u30eb\u306e\u30d1\u30b93\u7b2c4\u5f15\u6570\u304c\u76f8\u5bfe\u30d1\u30b9\u306e\u5834\u5408\u306e\u30ab\u30ec\u30f3\u30c8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306e\u30c7\u30a3\u30b9\u30af\u30ea\u30d7\u30bf4\u30b3\u30d4\u30fc\u5148<\/strong>\u30d5\u30a1\u30a4\u30eb\u306e\u30d1\u30b95\u30d5\u30e9\u30b0\uff08\u73fe\u72b6\u306f\u3001NOFOLLOW: \u30b7\u30f3\u30dc\u30ea\u30c3\u30af\u30ea\u30f3\u30af\u306e\u30ea\u30f3\u30af\u5143\u307e\u3067\u306f\u8ffd\u308f\u306a\u3044\u306e\u307f\uff1f)<\/div>\n<\/div>\n
\u5c31Unix\u5305\u4e2d\u7684\u7cfb\u7edf\u8c03\u7528\u53d1\u8d77\u51fd\u6570\u800c\u8a00\uff0c\u6709\u4e09\u4e2a\u51fd\u6570\uff1aSyscall()\u63a5\u53d7\u4e09\u4e2a\u53c2\u6570\uff0cSyscall6()\u63a5\u53d7\u516d\u4e2a\u53c2\u6570\uff0cSyscall9()\u63a5\u53d7\u4e5d\u4e2a\u53c2\u6570\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u7b2c\u516d\u4e2a\u53c2\u6570\u8bbe\u4e3a0\uff0c\u8c03\u7528Syscall6()\u5e94\u8be5\u662f\u4e00\u4e2a\u597d\u7684\u9009\u62e9\u3002<\/p>\n
\u6700\u7ec8\u7ed3\u679c\u4ee3\u7801\u5982\u4e0b\u3002<\/p>\n
var<\/span> (<\/span>\r\n    \/\/ Flags<\/span>\r\n    CLONE_NOFOLLOW<\/span>    CLONEFILE_FLAG<\/span> =<\/span> 0x0001<\/span> \/* Don't follow symbolic links *\/<\/span>\r\n    CLONE_NOOWNERCOPY<\/span> CLONEFILE_FLAG<\/span> =<\/span> 0x0002<\/span> \/* Don't copy ownership information from source *\/<\/span>\r\n    AT_FDCWD<\/span>                         =<\/span> -<\/span>2<\/span>\r\n)<\/span>\r\n\r\n\/\/ Clonefile clonefile is fast copy method for darwin(MacOS)<\/span>\r\nfunc<\/span> Clonefile<\/span>(<\/span>src<\/span>,<\/span> dst<\/span> string<\/span>)<\/span> (<\/span>err<\/span> error<\/span>)<\/span> {<\/span>\r\n    if<\/span> runtime<\/span>.<\/span>GOOS<\/span> !=<\/span> OS_DARWIN<\/span> {<\/span>\r\n        return<\/span> fmt<\/span>.<\/span>Errorf<\/span>(<\/span>\"Clonefile is implemented for macOS\"<\/span>)<\/span>\r\n    }<\/span>\r\n    var<\/span> _p0<\/span>,<\/span> _p1<\/span> *<\/span>byte<\/span>\r\n    _p0<\/span>,<\/span> err<\/span> =<\/span> unix<\/span>.<\/span>BytePtrFromString<\/span>(<\/span>src<\/span>)<\/span>\r\n    if<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n        return<\/span>\r\n    }<\/span>\r\n    _p1<\/span>,<\/span> err<\/span> =<\/span> unix<\/span>.<\/span>BytePtrFromString<\/span>(<\/span>dst<\/span>)<\/span>\r\n    if<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n        return<\/span>\r\n    }<\/span>\r\n    _<\/span>,<\/span> _<\/span>,<\/span> e1<\/span> :=<\/span> unix<\/span>.<\/span>Syscall6<\/span>(<\/span>unix<\/span>.<\/span>SYS_CLONEFILEAT<\/span>,<\/span> uintptr<\/span>(<\/span>AT_FDCWD<\/span>),<\/span> uintptr<\/span>(<\/span>unsafe<\/span>.<\/span>Pointer<\/span>(<\/span>_p0<\/span>)),<\/span> uintptr<\/span>(<\/span>AT_FDCWD<\/span>),<\/span> uintptr<\/span>(<\/span>unsafe<\/span>.<\/span>Pointer<\/span>(<\/span>_p1<\/span>)),<\/span> uintptr<\/span>(<\/span>CLONE_NOFOLLOW<\/span>),<\/span> 0<\/span>)<\/span>\r\n    if<\/span> e1<\/span> !=<\/span> 0<\/span> {<\/span>\r\n        err<\/span> =<\/span> errnoErr<\/span>(<\/span>e1<\/span>)<\/span>\r\n    }<\/span>\r\n    return<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5404\u79cd\u4e0d\u540c\u7684\u8865\u5145\u8bf4\u660e<\/h1>\n
\u3010\u989d\u5916\u9644\u52a0\uff11\u3011<\/p>\n
\u4eceGo 1.12\u5f00\u59cb\uff0c\u5728macOS\u4e0a\uff0c\u7cfb\u7edf\u8c03\u7528\u7684\u5b9e\u73b0\u4f3c\u4e4e\u53d1\u751f\u4e86\u53d8\u5316\u3002
\n\u7cfb\u7edf\u8c03\u7528\u7684\u51fd\u6570\u73b0\u5728\u662f\u5c0f\u5199\u5b57\u6bcd+\u4e0b\u5212\u7ebf\u7684\u5f62\u5f0f\uff0c\u4f8b\u5982syscall_syscall6\uff0c\u5e76\u4e14\u7cfb\u7edf\u8c03\u7528\u7684\u7f16\u53f7\u4e5f\u662f\u901a\u8fc7\u4ecelibc\u83b7\u53d6\u7684\u65b9\u5f0f\u83b7\u5f97\u3002
\nhttps:\/\/github.com\/golang\/sys\/blob\/9fbf701fc3\/unix\/zsyscall_darwin_arm64.go
\n\uff08\u4e3a\u4ec0\u4e48\u4f1a\u8fd9\u6837\u5462\uff09<\/p>\n
\u3010\u9644\u52a02\u3011<\/p>\n
\u6216\u8bb8\u4f5c\u4e3a\u89c4\u8303\uff0c\u53ef\u4ee5\u76f4\u63a5\u8c03\u7528C\u8bed\u8a00\u51fd\u6570\uff0c\u800c\u4e0d\u662f\u76f4\u63a5\u8c03\u7528\u7cfb\u7edf\u8c03\u7528\uff0c\u5c31\u50cf\u8fd9\u4f4d\u7684\u505a\u6cd5\u4e00\u6837\uff1ahttps:\/\/github.com\/go-darwin\/apfs\/blob\/master\/clone.go<\/p>\n
Go Binary Hacks – syscall\u548cgolang.org\/x\/sys\/ #golang\u4ee5\u53caGoogle\u6587\u6863\u4e2d\u6db5\u76d6\u4e86\u6709\u5173\u8fd9\u65b9\u9762\u7684\u8be6\u7ec6\u4fe1\u606f\u3002<\/div>\n","protected":false},"excerpt":{"rendered":"
\u9996\u5148\uff0c \u53bb\u5e74\u5e74\u5e95\uff082018\u5e74\u672b\uff09\uff0c\u5728\u6211\u7684\u5de5\u4f5c\u573a\u6240\u4e5f\u6709\u4eba\u8c08\u8bbaMac\u7684cp\u547d\u4ee4\u7684\u9009\u9879\u3002 \u6700\u8fd1\u7684macOS\u636e\u8bf4\u53ef\u4ee5\u5728 […]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-44429","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n\u6211\u60f3\u5728Golang\u4e2d\u8fd0\u884cclonefile\u2192\u5c1d\u8bd5\u53d1\u51fa\u7cfb\u7edf\u8c03\u7528 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u6211\u60f3\u5728golang\u4e2d\u8fd0\u884cclonefile\u2192\u5c1d\u8bd5\u53d1\u51fa\u7cfb\u7edf\u8c03\u7528\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u6211\u60f3\u5728Golang\u4e2d\u8fd0\u884cclonefile\u2192\u5c1d\u8bd5\u53d1\u51fa\u7cfb\u7edf\u8c03\u7528\" \/>\n<meta property=\"og:description\" content=\"\u9996\u5148\uff0c \u53bb\u5e74\u5e74\u5e95\uff082018\u5e74\u672b\uff09\uff0c\u5728\u6211\u7684\u5de5\u4f5c\u573a\u6240\u4e5f\u6709\u4eba\u8c08\u8bbaMac\u7684cp\u547d\u4ee4\u7684\u9009\u9879\u3002 \u6700\u8fd1\u7684macOS\u636e\u8bf4\u53ef\u4ee5\u5728 […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u6211\u60f3\u5728golang\u4e2d\u8fd0\u884cclonefile\u2192\u5c1d\u8bd5\u53d1\u51fa\u7cfb\u7edf\u8c03\u7528\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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