{"id":14,"date":"2012-11-28T23:23:57","date_gmt":"2012-11-28T15:23:57","guid":{"rendered":"http:\/\/blog.dbgtech.net\/blog\/?p=14"},"modified":"2012-11-28T23:23:57","modified_gmt":"2012-11-28T15:23:57","slug":"%e5%90%90%e6%a7%bd","status":"publish","type":"post","link":"https:\/\/www.dbgtech.net\/blog\/2012\/11\/%e5%90%90%e6%a7%bd\/","title":{"rendered":"\u5410\u69fd"},"content":{"rendered":"<p>\u6700\u8fd1Linux\u4e0b\u6211\u7684DB server\u9047\u5230\u4e00\u8be1\u5f02\u95ee\u9898\u3002\u65e5\u5fd7\u6587\u4ef6\u4e2d\u6beb\u65e0\u6765\u7531\u591a\u4e86N\u591aquery string\u7684\u5185\u5bb9\uff0c\u7ecf\u67e5\u770b\u4f3c\u4e4e\u6bcf\u6761\u67e5\u8be2\u90fd\u88ab\u8bb0\u5f55\u5230\u4e86\u65e5\u5fd7\u4e2d\uff0c\u538b\u529b\u6d4b\u8bd5\u4e0b\u51e0\u5206\u949f\u5c31\u80fd\u751f\u6210N\u4e2aG\u7684\u5185\u5bb9\u3002\u641c\u7d22\u4e86\u65e0\u6570\u904d\u4ee3\u7801\uff0c\u786e\u8ba4\u6ca1\u6709\u5199\u8fc7\u8fd9\u90e8\u5206\u65e5\u5fd7\u3002Windows\u7248\u672c\u4e0b\u5374\u6ca1\u6709\u53d1\u73b0\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n<p>bp fwrite\uff0c\u65e0\u679c\uff1bbp write\uff0c\u65e0\u679c\u2026\u2026\u4ed4\u7ec6\u67e5\u770b\u4ee3\u7801\uff0c\u5f80\u6587\u4ef6\u4e2d\u5199\u5165\u5b8c\u6574\u67e5\u8be2\u8bed\u53e5\u7684\u5730\u65b9\u53ea\u53ef\u80fd\u6709\u4e00\u5904\u3002\u5b57\u7b26\u4e32\u5904\u7406\u7684\u65f6\u5019\u4e3a\u4e86\u8ba1\u7b97sprintf\u9700\u8981\u7684\u7f13\u51b2\u533a\u957f\u5ea6\uff0c\u5728MString\u7c7b\u4e2d\u672c\u6765\u60f3\u901a\u8fc7fopen\u6253\u5f00\/dev\/null\u6587\u4ef6\uff0c\u5e76\u8c03\u7528vfprintf\u6765\u8ba1\u7b97\u4e86\u683c\u5f0f\u5316\u8f93\u51fa\u7684\u957f\u5ea6\uff0c\u4f46\u662f\u624b\u8d31\u5199\u6210\u4e86vprintf\uff0c\u7ed3\u679c\u672c\u4e0d\u5e94\u88ab\u4fdd\u5b58\u4e0b\u6765\u7684\u4e2d\u95f4\u6570\u636e\u88ab\u5199\u5230stdout\u3002\u800cWindows\u4e0b\u9762\u7531\u4e8eCRT\u76f4\u63a5\u63d0\u4f9b\u4e86_vscprintf\u51fd\u6570\uff0c\u6ca1\u6709\u81ea\u5df1\u505a\u5904\u7406\uff0c\u6240\u4ee5\u6ca1\u6709\u53d1\u73b0\u95ee\u9898\u3002<\/p>\n<p>\u6539\u6389\u5b88\u62a4\u8fdb\u7a0b\u7684\u521d\u59cb\u5316\u4ee3\u7801\uff0c\u7167\u6284\u4e86UNIX\u73af\u5883\u9ad8\u7ea7\u7f16\u7a0b\u4e2d\u7684\u90a3\u90e8\u5206\u5904\u7406\u4ee3\u7801\uff0c\u5173\u95ed\u5f53\u524d\u6240\u6709FD\uff0c\u5e76open \/dev\/null\u518ddup\u4e24\u6b21\u5360\u63890,1,2\u4e09\u4e2afd\uff0c\u5c06\u6807\u51c6\u8f93\u5165\u8f93\u5165\u91cd\u5b9a\u5411\u8fc7\u53bb\u3002\u95ee\u9898\u89e3\u51b3\u3002<\/p>\n<p>\u4e4b\u524d\u7684daemon\u4ee3\u7801\u6284\u88ad\u4e86\u67d0\u5783\u573e\u4ee3\u7801\uff0cclose\u6389\u4e86\u4e09\u4e2a\u6807\u51c6fd\uff0c\u9020\u6210\u540e\u9762\u6211\u81ea\u5df1\u6253\u5f00\u65e5\u5fd7\u6587\u4ef6fd\u88ab\u5206\u914d\u52301\u3002\u800cvfprintf\u8f93\u51fa\u5230stdout\uff0c\u7ed3\u679c\u672c\u6765\u5e94\u8be5\u8f93\u51fa\u5230\/dev\/null\u4e2d\u7684\u5185\u5bb9\u88ab\u8f93\u51fa\u5230\u8fd9\u4e2a\u65e5\u5fd7\u6587\u4ef6\u4e2d\u3002<\/p>\n<p>\u8fd9\u4e2a\u95ee\u9898\u6709\u70b9\u5de7\u5408\uff0c\u6211\u81ea\u5df1\u7684BUG\u52a0\u4e0aUNIX\u73af\u5883\u4e0b\u7684\u4e00\u4e9b\u9057\u7559\u7684\u4e1c\u897f\u9020\u6210\u4e86\u8be1\u5f02\u95ee\u9898\u3002\u7a0d\u5fae\u8bb0\u5f55\u4e00\u4e0b\uff0c\u5199daemon\u7684\u65f6\u5019\u4e00\u5b9a\u8981\u8bb0\u5f97\u5904\u7406\u4e09\u4e2a\u6807\u51c6fd\uff0c\u987a\u4fbf\u5410\u69fd\u4e00\u4e0bUNIX\u7684\u8fd9\u4e9b\u53e4\u8463\u8bbe\u8ba1\u2026\u2026<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6700\u8fd1Linux\u4e0b\u6211\u7684DB server\u9047\u5230\u4e00\u8be1\u5f02\u95ee\u9898\u3002\u65e5\u5fd7\u6587\u4ef6\u4e2d\u6beb\u65e0\u6765\u7531\u591a\u4e86N\u591a &hellip; 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