{"id":4039,"date":"2012-06-02T17:50:04","date_gmt":"2012-06-02T09:50:04","guid":{"rendered":"http:\/\/edsionte.com\/techblog\/?p=4039"},"modified":"2012-06-02T17:50:04","modified_gmt":"2012-06-02T09:50:04","slug":"libc%e5%ba%93%e5%92%8c%e7%b3%bb%e7%bb%9f%e8%b0%83%e7%94%a8","status":"publish","type":"post","link":"http:\/\/edsionte.com\/techblog\/archives\/4039","title":{"rendered":"libc\u5e93\u548c\u7cfb\u7edf\u8c03\u7528"},"content":{"rendered":"

Linux\u7cfb\u7edf\u8c03\u7528\u8fd9\u90e8\u5206\u7ecf\u5e38\u51fa\u73b0\u4e24\u4e2a\u8bcd\uff1alibc\u5e93\u548c\u5c01\u88c5\u51fd\u6570\uff0c\u4e0d\u77e5\u9053\u4f60\u662f\u5426\u6e05\u695a\u5b83\u4eec\u7684\u542b\u4e49\uff1f<\/p>\n

libc<\/h3>\n

libc\u662fStandard C library\u7684\u7b80\u79f0\uff0c\u5b83\u662f\u7b26\u5408ANSI C\u6807\u51c6\u7684\u4e00\u4e2a\u6807\u51c6\u51fd\u6570\u5e93\u3002libc\u5e93\u63d0\u4f9bC\u8bed\u8a00\u4e2d\u6240\u4f7f\u7528\u7684\u5b8f\uff0c\u7c7b\u578b\u5b9a\u4e49\uff0c\u5b57\u7b26\u4e32\u64cd\u4f5c\u51fd\u6570\uff0c\u6570\u5b66\u8ba1\u7b97\u51fd\u6570\u4ee5\u53ca\u8f93\u5165\u8f93\u51fa\u51fd\u6570\u7b49\u3002\u6b63\u5982ANSI C\u662fC\u8bed\u8a00\u7684\u6807\u51c6\u4e00\u6837\uff0clibc\u53ea\u662f\u4e00\u79cd\u51fd\u6570\u5e93\u6807\u51c6\uff0c\u6bcf\u4e2a\u64cd\u4f5c\u7cfb\u7edf\u90fd\u4f1a\u6309\u7167\u8be5\u6807\u51c6\u5bf9\u6807\u51c6\u5e93\u8fdb\u884c\u5177\u4f53\u5b9e\u73b0\u3002\u901a\u5e38\u6211\u4eec\u6240\u8bf4\u7684libc\u662f\u7279\u6307\u67d0\u4e2a\u64cd\u4f5c\u7cfb\u7edf\u7684\u6807\u51c6\u5e93\uff0c\u6bd4\u5982\u6211\u4eec\u5728Linux\u64cd\u4f5c\u7cfb\u7edf\u4e0b\u6240\u8bf4\u7684libc\u5373glibc\u3002glibc\u662f\u7c7bUnix\u64cd\u4f5c\u7cfb\u7edf\u4e2d\u4f7f\u7528\u6700\u5e7f\u6cdb\u7684libc\u5e93\uff0c\u5b83\u7684\u5168\u79f0\u662fGNU C Library\u3002<\/p>\n

\u7c7bUnix\u64cd\u4f5c\u7cfb\u7edf\u901a\u5e38\u5c06libc\u5e93\u4f5c\u4e3a\u64cd\u4f5c\u7cfb\u7edf\u7684\u4e00\u90e8\u5206\uff0c\u5b83\u88ab\u89c6\u4e3a\u64cd\u4f5c\u7cfb\u7edf\u4e0e\u7528\u6237\u7a0b\u5e8f\u4e4b\u95f4\u7684\u63a5\u53e3\u3002libc\u5e93\u4e0d\u4ec5\u5b9e\u73b0\u6807\u51c6C\u8bed\u8a00\u4e2d\u7684\u51fd\u6570\uff0c\u800c\u4e14\u4e5f\u5305\u542b\u81ea\u5df1\u6240\u5c5e\u7684\u51fd\u6570\u63a5\u53e3\u3002\u6bd4\u5982\u5728glibc\u5e93\u4e2d\uff0c\u65e2\u5305\u542b\u6807\u51c6C\u4e2d\u7684fopen()\uff0c\u53c8\u5305\u542b\u7c7bUnix\u7cfb\u7edf\u4e2d\u7684open()\u3002\u5728\u7c7bUnix\u64cd\u4f5c\u7cfb\u7edf\u4e2d\uff0c\u5982\u679c\u7f3a\u5931\u4e86\u6807\u51c6\u5e93\uff0c\u90a3\u4e48\u6574\u4e2a\u64cd\u4f5c\u7cfb\u7edf\u5c06\u4e0d\u80fd\u6b63\u5e38\u8fd0\u8f6c\u3002<\/p>\n

\u4e0e\u7c7bUnix\u64cd\u4f5c\u7cfb\u7edf\u4e0d\u540c\u7684\u662f\uff0cWindows\u7cfb\u7edf\u5e76\u4e0d\u5c06libc\u5e93\u4f5c\u4e3a\u6574\u4e2a\u6838\u5fc3\u64cd\u4f5c\u7cfb\u7edf\u7684\u4e00\u90e8\u5206\u3002\u901a\u5e38\u6bcf\u4e2a\u7f16\u8bd1\u5668\u90fd\u9644\u5c5e\u81ea\u5df1\u7684libc\u5e93\uff0c\u8fd9\u4e9blibc\u65e2\u53ef\u4ee5\u9759\u6001\u7f16\u8bd1\u5230\u7a0b\u5e8f\u4e2d\uff0c\u53c8\u53ef\u4ee5\u52a8\u6001\u7f16\u8bd1\u5230\u7a0b\u5e8f\u4e2d\u3002\u4e5f\u5c31\u662f\u8bf4\u5e94\u7528\u7a0b\u5e8f\u4f9d\u8d56\u7f16\u8bd1\u5668\u800c\u4e0d\u662f\u64cd\u4f5c\u7cfb\u7edf\u3002<\/p>\n

\u5c01\u88c5\u51fd\u6570<\/h3>\n

\u5728Linux\u7cfb\u7edf\u4e2d\uff0cglibc\u5e93\u4e2d\u5305\u542b\u8bb8\u591aAPI\uff0c\u5927\u591a\u6570API\u90fd\u5bf9\u5e94\u4e00\u4e2a\u7cfb\u7edf\u8c03\u7528\uff0c\u6bd4\u5982\u5e94\u7528\u7a0b\u5e8f\u4e2d\u4f7f\u7528\u7684\u63a5\u53e3open()\u5c31\u5bf9\u5e94\u540c\u540d\u7684\u7cfb\u7edf\u8c03\u7528open()\u3002\u5728glibc\u5e93\u4e2d\u901a\u8fc7\u5c01\u88c5\u4f8b\u7a0b\uff08Wrapper Routine\uff09\u5c06API\u548c\u7cfb\u7edf\u8c03\u7528\u5173\u8054\u8d77\u6765\u3002API\u662f\u5934\u6587\u4ef6\u4e2d\u6240\u5b9a\u4e49\u7684\u51fd\u6570\u63a5\u53e3\uff0c\u800c\u4f4d\u4e8eglibc\u4e2d\u7684\u5c01\u88c5\u4f8b\u7a0b\u5219\u662f\u5bf9\u8be5API\u5bf9\u5e94\u529f\u80fd\u7684\u5177\u4f53\u5b9e\u73b0\u3002\u4e8b\u5b9e\u4e0a\uff0c\u6211\u4eec\u77e5\u9053\u63a5\u53e3open()\u6240\u8981\u5b8c\u6210\u7684\u529f\u80fd\u662f\u901a\u8fc7\u7cfb\u7edf\u8c03\u7528open()\u5b8c\u6210\u7684\uff0c\u56e0\u6b64\u5c01\u88c5\u4f8b\u7a0b\u8981\u505a\u7684\u5de5\u4f5c\u5c31\u662f\u5148\u5c06\u63a5\u53e3open()\u4e2d\u7684\u53c2\u6570\u590d\u5236\u5230\u76f8\u5e94\u5bc4\u5b58\u5668\u4e2d\uff0c\u7136\u540e\u5f15\u53d1\u4e00\u4e2a\u5f02\u5e38\uff0c\u4ece\u800c\u7cfb\u7edf\u8fdb\u5165\u5185\u6838\u53bb\u6267\u884csys_open()\uff0c\u6700\u540e\u5f53\u7cfb\u7edf\u8c03\u7528\u6267\u884c\u5b8c\u6bd5\u540e\uff0c\u5c01\u88c5\u4f8b\u7a0b\u8fd8\u8981\u5c06\u9519\u8bef\u7801\u8fd4\u56de\u5230\u5e94\u7528\u7a0b\u5e8f\u4e2d\u3002<\/p>\n

\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u51fd\u6570\u5e93\u4e2d\u7684API\u548c\u7cfb\u7edf\u8c03\u7528\u5e76\u6ca1\u6709\u4e00\u4e00\u5bf9\u5e94\u7684\u5173\u7cfb\u3002\u5e94\u7528\u7a0b\u5e8f\u501f\u52a9\u7cfb\u7edf\u8c03\u7528\u53ef\u4ee5\u83b7\u5f97\u5185\u6838\u6240\u63d0\u4f9b\u7684\u670d\u52a1\uff0c\u50cf\u5b57\u7b26\u4e32\u64cd\u4f5c\u8fd9\u6837\u7684\u51fd\u6570\u5e76\u4e0d\u9700\u8981\u501f\u52a9\u5185\u6838\u6765\u5b9e\u73b0\uff0c\u56e0\u6b64\u4e5f\u5c31\u4e0d\u5fc5\u4e0e\u67d0\u4e2a\u7cfb\u7edf\u8c03\u7528\u5173\u8054\u3002<\/p>\n

\u4e0d\u8fc7\uff0c\u6211\u4eec\u5e76\u4e0d\u662f\u5fc5\u987b\u901a\u8fc7\u5c01\u88c5\u4f8b\u7a0b\u624d\u80fd\u4f7f\u7528\u7cfb\u7edf\u8c03\u7528\uff0csyscall()\u548c_syscallx()\u4e24\u4e2a\u51fd\u6570\u53ef\u4ee5\u76f4\u63a5\u8c03\u7528\u7cfb\u7edf\u8c03\u7528\u3002\u5177\u4f53\u4f7f\u7528\u65b9\u6cd5man\u624b\u518c\u4e2d\u5df2\u7ecf\u8bf4\u660e\u7684\u5f88\u6e05\u695a\u4e86\u3002<\/p>\n

\u53c2\u8003\uff1a<\/p>\n

1.\u00a0http:\/\/en.wikipedia.org\/wiki\/Libc<\/a><\/p>\n

2. man syscalls<\/p>\n","protected":false},"excerpt":{"rendered":"

Linux\u7cfb\u7edf\u8c03\u7528\u8fd9\u90e8\u5206\u7ecf\u5e38\u51fa\u73b0\u4e24\u4e2a\u8bcd\uff1alibc\u5e93\u548c\u5c01\u88c5\u51fd\u6570\uff0c\u4e0d\u77e5\u9053\u4f60\u662f\u5426\u6e05\u695a\u5b83\u4eec\u7684\u542b\u4e49\uff1f libc libc […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[278],"tags":[337,338,339,179],"class_list":["post-4039","post","type-post","status-publish","format-standard","hentry","category-linux","tag-glibc","tag-libc","tag-339","tag-179"],"views":10863,"_links":{"self":[{"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/posts\/4039","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/comments?post=4039"}],"version-history":[{"count":0,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/posts\/4039\/revisions"}],"wp:attachment":[{"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/media?parent=4039"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/categories?post=4039"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/edsionte.com\/techblog\/wp-json\/wp\/v2\/tags?post=4039"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}