{"id":111,"date":"2005-09-06T18:05:47","date_gmt":"2005-09-06T10:05:47","guid":{"rendered":"http:\/\/yesybl.org\/blogcn\/2005\/09\/06\/111\/"},"modified":"2005-09-06T18:05:47","modified_gmt":"2005-09-06T10:05:47","slug":"fam_api_odhiaeoa-2","status":"publish","type":"post","link":"https:\/\/www.yesybl.com\/?p=111","title":{"rendered":"FAM_API_\u4e2d\u6587\u624b\u518c"},"content":{"rendered":"

\/*************************************************\/
\n\/*\u672c\u6587\u6863\u7531\u9e3f\u5251\u9752\u7ffb\u8bd1\uff0c\u539f\u59cb\u82f1\u6587\u6587\u6863\u5728             *\/
\n\/*http:\/\/techpubs.sgi.com\/library\/tpl\/c*\/
\n\/*i-bin\/getdoc.cgi\/0650\/bks\/SGI_Develop*\/
\n\/*er\/books\/IIDsktp_IG\/sgi_html\/ch08.htm*\/
\n\/*l#LE29093-PARENT                     *\/
\n\/*\u65e5\u671f\uff1a2005\u5e748\u670831\u65e5                            *\/
\n\/*\u53cc\u6a2a\u7ebf\u4e2d\u7684\u5185\u5bb9\u672a\u4ee3\u7801 *\/
\n\/*\u5355\u6a2a\u7ebf\u4e2d\u7684\u5185\u5bb9\u4e3a\u63d0\u793a\u6216\u6ce8\u610f\u4e8b\u9879 *\/
\n\/*\u81ea\u5df1\u7ffb\u8bd1\u7684\uff0c\u5982\u6709\u95ee\u9898\u8bf7\u6307\u6b63\uff0c\u8c22\u8c22\uff01 *\/
\n\/*************************************************\/<\/p>\n

FAM\u63a5\u53e3<\/p>\n

\u8fd9\u4e00\u8282\u63cf\u8ff0\u4e86\u4f60\u7684\u5e94\u7528\u7a0b\u5e8f\u8fde\u63a5\u5230FAM\u6240\u4f7f\u7528\u7684\u51fd\u6570\u3002<\/p>\n

1\u6253\u5f00\u548c\u5173\u95ed\u4e00\u4e2aFAM\u8fde\u63a5
\n\u51fd\u6570FAMOpen()\u6253\u5f00\u4e00\u4e2a\u5230fam\u7684\u8fde\u63a5\u3002
\n=======================================
\nint FAMOpen(FAMConnection* fc)
\n=======================================
\n\u5982\u679c\u6210\u529f\uff0cFAMOpen()\u8fd4\u56de0,\u5982\u679c\u5931\u8d25\uff0c\u5219\u8fd4\u56de-1\u3002FAMOpen()\u521d\u59cb\u5316\u7684FAMConnection\u7ed3\u6784\u4f53\u5c06\u88ab\u7528\u4e8e\u4f20\u9012\u7ed9\u6240\u6709\u5728\u4f60\u5e94\u7528\u7a0b\u5e8f\u4e2d\u88ab\u8c03\u7528\u7684FAM\u5b50\u8fdb\u7a0b\u3002<\/p>\n

FAMConnection\u7ed3\u6784\u4f53\u4e2d\u6709\u4e00\u4e2a\u57fa\u672c\u7684\u5143\u7d20\uff0c\u5b83\u662fFAM\u7528\u6765\u548c\u4f60\u7684\u5e94\u7528\u7a0b\u5e8f\u8fdb\u884c\u901a\u4fe1\u7684\u63a5\u53e3\uff08socket\uff09\u7684\u76f8\u5173\u6587\u4ef6\u63cf\u8ff0\u7b26\u3002\u4f60\u9700\u8981\u8fd9\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\u5728socket\u4e0a\u6267\u884cselect()\u64cd\u4f5c\u3002\u4f60\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528FAMCONNECTION_GETFD()\u5b8f\u6765\u83b7\u5f97\u8fd9\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\u3002
\n=======================================
\nFAMCONNECTION_GETFD(fc)
\n=======================================
\n\u51fd\u6570FAMOpen2\u544a\u8bc9FAM\u5e94\u7528\u7a0b\u5e8f\u7684\u540d\u5b57
\n=======================================
\nint FAMOpen2(FAMConnection* fc, const char* appName)
\n=======================================
\n\u5f53FAM\u6253\u5370\u51fa\u9519\u4fe1\u606f\u7684\u65f6\u5019\u4f1a\u4f7f\u7528\u5230\u5e94\u7528\u7a0b\u5e8f\u540d\uff08appName\uff09<\/p>\n

\u51fd\u6570FAMClose()\u5173\u95ed\u4e00\u4e2a\u5230fam\u7684\u8fde\u63a5
\n=======================================
\nint FAMClose(FAMConnection* fc)
\n=======================================
\n\u5982\u679c\u6210\u529f\uff0cFAMClose()\u8fd4\u56de0,\u5426\u5219\u8fd4\u56de-1.<\/p>\n

2\u76d1\u89c6\u4e00\u4e2a\u6587\u4ef6\u6216\u76ee\u5f55<\/p>\n

FAMMonitorDirecotry()\u548cFAMMonitorFile()\u5206\u522b\u544a\u8bc9FAM\u5f00\u59cb\u7684\u76d1\u89c6\u4e00\u4e2a\u76ee\u5f55\u548c\u6587\u4ef6\u3002
\n=======================================
\nint FAMMonitorDirecotry(FAMConnection *fc,char *filename,FAMRequest* fr,void* userData)<\/p>\n

int FAMMonitorFile(FAMConnection *fc,char *filename,FAMRequest* fr,void* userData)
\n======================================
\nFAMMonitorDirectory()\u4e0d\u4ec5\u4ec5\u76d1\u89c6\u6307\u5b9a\u7684\u76ee\u5f55\u6587\u4ef6\u672c\u8eab\u7684\u53d8\u5316\uff0c\u8fd8\u76d1\u89c6\u8be5\u76ee\u5f55\u4e0b\u6587\u4ef6\u7684\u53d8\u5316\u3002\u5982\u679c\u8be5\u76ee\u5f55\u5305\u542b\u6709\u5b50\u76ee\u5f55\uff0c\u5219FAMMonitorDirecotry()\u4ec5\u4ec5\u53ea\u76d1\u89c6\u8fd9\u4e9b\u5b50\u76ee\u5f55\u7684\u53d8\u5316\uff0c\u800c\u4e0d\u76d1\u89c6\u8fd9\u4e9b\u5b50\u76ee\u5f55\u4e0b\u6587\u4ef6\u548c\u76ee\u5f55\u7684\u53d8\u5316\u3002FAMMonitorFile()\u4ec5\u4ec5\u53ea\u663e\u793a\u6307\u5b9a\u6587\u4ef6\u53d1\u751f\u4e86\u4ec0\u4e48\u53d8\u5316\u3002\u8fd9\u4e24\u4e2a\u51fd\u6570\u5728\u6210\u529f\u540e\u90fd\u8fd4\u56de0,\u5426\u5219\u90fd\u8fd4\u56de-1.<\/p>\n

\u8fd9\u4e9b\u51fd\u6570\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u88abFAMOpen()\u521d\u59cb\u5316\u7684FAMConnection\u7ed3\u6784\u4f53\u3002\u7b2c\u4e8c\u4e2a\u53c2\u6570\u662f\u8981\u88ab\u76d1\u89c6\u7684\u76ee\u5f55\u6216\u6587\u4ef6\u7684\u5168\u8def\u5f84\u53ca\u540d\u79f0\u3002\u6ce8\u610f\uff0c\u4e0d\u80fd\u4f7f\u7528\u76f8\u5bf9\u8def\u5f84\u3002<\/p>\n

\u7b2c\u4e09\u4e2a\u53c2\u6570\u662f\u8fd9\u4e24\u4e2a\u51fd\u6570\u521d\u59cb\u5316\u7684\u4e00\u4e2aFAMRequest\u7ed3\u6784\u4f53\u3002\u4f60\u53ef\u4ee5\u4f20\u9012\u8fd9\u4e2a\u7ed3\u6784\u4f53\u7ed9FAMSuspendMonitor(),FAMResumeMonitor()\u6216FAMCancelMonitor()\u53bb\u5206\u522b\u6682\u505c\u3001\u6062\u590d\u6216\u53d6\u6d88\u5bf9\u6587\u4ef6\u6216\u76ee\u5f55\u7684\u76d1\u89c6\u3002<\/p>\n

\u7b2c\u56db\u4e2a\u53c2\u6570\u662f\u4e00\u4e2a\u6307\u9488\uff0c\u8fd9\u4e2a\u6307\u9488\u6307\u5411\u4e86\u5f53\u4e00\u4e2a\u6587\u4ef6\u6216\u76ee\u5f55\u6539\u53d8\u65f6\uff0c\u4f60\u6240\u60f3\u8981\u5305\u542b\u8fdb\u7531FAMNextEvent()\u8fd4\u56de\u7684FAMEvent\u7ed3\u6784\u4f53\u4e2d\u7684\u4e00\u4e2a\u5f3a\u5236\uff08arbitrary\uff09\u7528\u6237\u6570\u636e\u3002<\/p>\n

\u4e0d\u8bba\u4f55\u65f6\uff0c\u5f53FAM\u4fa6\u6d4b\u5230\u6240\u76d1\u89c6\u7684\u6587\u4ef6\u6216\u76ee\u5f55\u6539\u53d8\u65f6\uff0cFAM\u4ea7\u751fFAM\u4e8b\u4ef6\u3002<\/p>\n

\u4e24\u4e2a\u76f8\u4f3c\u7684\u4f8b\u7a0b\u662fFAMMonitorDirectory2()\u548cFAMMonitorFile2():
\n===============================================
\nint FAMMonitorDirectory2(FAMConnection *fc,char *filename,FAMrequest* fr);<\/p>\n

int FAMMonitorFiles2(FAMConnection *fc,char *filename,FAMRequet* fr);
\n===============================================
\n\u5728\u8fd9\u4e24\u4e2a\u4f8b\u7a0b\u4e2d\uff0c\u8c03\u7528\u8005\u6311\u9009\u8bf7\u6c42\u53f7\u7801\uff0c\u800c\u4e0d\u662flibfam,\u8c03\u7528\u8005\u5728\u8c03\u7528\u4e4b\u524d\u901a\u8fc7\u628a\u8981\u6c42\u7684\u53f7\u7801\u653e\u7f6e\u5728FAMRequest\u4e2d\u6765\u6307\u5b9a\u6240\u8981\u6c42\u7684\u53f7\u7801\u3002\u6bd4\u5982\uff1a
\n===============================================
\nFAMConnection fc;
\nFAMRequest frq;
\n…
\nfrq.reqnum=some_number_associated_with_tmp;
\nif (FAMMonitorDirectory2(&fc,"\/tmp",&frq) <0)
\n        perror("can’t monitor \/tmp");
\n===============================================
\n\u5982\u679c\u4f60\u4f7f\u7528-2\u4f8b\u7a0b\uff0c\u4f60\u5fc5\u987b\u9009\u62e9\u72ec\u4e00\u65e0\u4e8c\u7684\u8981\u6c42\u53f7\u7801\uff0c\u53c2\u770b\u4e0b\u9762\u7684FAMAcknowledge.<\/p>\n

\u4f7f\u7528\u54ea\u79cd\u4f8b\u7a0b\u662f\u7531\u4f60\u81ea\u5df1\u51b3\u5b9a\u7684\uff1a-2\u4f8b\u7a0b\u6216\u539f\u59cb\u4f8b\u7a0b\u3002<\/p>\n

3\u6682\u505c\u3001\u6062\u590d\u548c\u53d6\u6d88\u76d1\u89c6
\n\u4e00\u65e6\u4f60\u5df2\u7ecf\u5f00\u59cb\u76d1\u89c6\u4e00\u4e2a\u6587\u4ef6\u6216\u76ee\u5f55\uff0c\u90a3\u4e48\u4f60\u53ef\u4ee5\u53d6\u6d88\u6216\u4e34\u65f6\u6682\u505c\u76d1\u89c6\uff0c\u4ee5\u53ca\u4ee5\u540e\u518d\u6062\u590d\u76d1\u89c6\u3002<\/p>\n

FAMSuspendMonitor()\u4e34\u65f6\u6682\u505c\u76d1\u89c6\u4e00\u4e2a\u6587\u4ef6\u6216\u76ee\u5f55\u3002FAMResumeMonitor()\u6062\u590d\u5bf9\u4e00\u4e2a\u6587\u4ef6\u6216\u76ee\u5f55\u7684\u76d1\u89c6\u3002\u5f53\u4f60\u7684\u5e94\u7528\u7a0b\u5e8f\u4e0d\u9700\u8981\u663e\u793a\u5173\u4e8e\u67d0\u4e2a\u6587\u4ef6\u7684\u4fe1\u606f\u662f\uff0c\u6682\u505c\u76d1\u89c6\u662f\u975e\u5e38\u6709\u7528\u7684\u3002
\n———————————————–
\n\u6ce8\u610f\uff1aFAM\u5728\u6682\u505c\u76d1\u89c6\u7684\u65f6\u5019\u4f1a\u5c06\u6587\u4ef6\u6240\u53d1\u751f\u7684\u4efb\u4f55\u6539\u53d8\u6392\u6210\u961f\u5217\uff0c\u5f53\u4f60\u7684\u5e94\u7528\u7a0b\u5e8f\u6062\u590d\u76d1\u89c6\u7684\u65f6\u5019\uff0c\u6587\u4ef6\u6240\u6709\u7684\u6539\u53d8
\n\u90fd\u4f1a\u88ab\u901a\u77e5\u3002
\n———————————————–
\n\u8fd9\u4e9b\u51fd\u6570\u7684\u8bed\u6cd5\u5982\u4e0b\uff1a
\n===============================================
\nint FAMSuspendMonitor(FAMConnection *fc,FAMRequest *fr);<\/p>\n

int FAMResumeMonitor(FAMConnection *fc,FAMRequest *fr);
\n===============================================
\nfc\u662f\u7531FAMOpen()\u6240\u8fd4\u56de\u7684FAMConnection,fr\u662f\u7531FAMMonitorFile()\u6216FAMMonitorDirecotry()\u6240\u8fd4\u56de\u7684FAMRequest\u3002\u4e24\u4e2a\u51fd\u6570\u5728\u6210\u529f\u540e\u90fd\u8fd4\u56de0,\u5426\u5219\u8fd4\u56de-1.<\/p>\n

\u5f53\u4f60\u7684\u5e94\u7528\u7a0b\u5e8f\u5b8c\u6210\u5bf9\u4e00\u4e2a\u6587\u4ef6\u6216\u76ee\u5f55\u7684\u76d1\u89c6\u540e\uff0c\u5b83\u5e94\u8be5\u547c\u53ebFAMCancelMonitor():
\n===============================================
\nint FAMCancelMonitor(FAMConnection *fc,FAMRequest *fr)
\n===============================================
\nFAMCancelMonitor()\u547d\u4ee4FAM\u4e0d\u518d\u5bf9\u7531fr\u6240\u6307\u5b9a\u7684\u6587\u4ef6\u6216\u76ee\u5f55\u8fdb\u884c\u76d1\u89c6\u3002\u5982\u679c\u6210\u529f\u8fd4\u56de0,\u5426\u5219\u8fd4\u56de-1.<\/p>\n

\u8c03\u7528\u5b8cFAMCancelMonitor(),FAM\u53d1\u9001\u4e00\u4e2aFAMAcknowledge\u4e8b\u4ef6\uff0c\u5f53\u4f60\u5df2\u7ecf\u770b\u8fc7FAMAcknowledge\u4e8b\u4ef6\uff0c\u4f60\u4f1a\u77e5\u9053\u5b83\u5b89\u5168\u7684\u91cd\u65b0\u4f7f\u7528\u4e86\u8bf7\u6c42\u53f7\u7801\uff08\u5982\u679c\u4f60\u5728\u4f7f\u7528-2\u5f62\u5f0f\u7684\u4f8b\u7a0b\uff09<\/p>\n

4\u4fa6\u6d4b\u6587\u4ef6\u548c\u76ee\u5f55\u7684\u6539\u53d8<\/p>\n

\u65e0\u8bba\u4f55\u65f6FAM\u4fa6\u6d4b\u5230\u5b83\u6240\u76d1\u89c6\u7684\u6587\u4ef6\u53d1\u751f\u6539\u53d8\uff0c\u90fd\u4f1a\u4ea7\u751f\u4e00\u4e2aFAM\u4e8b\u4ef6\uff0c\u4f60\u7684\u5e94\u7528\u7a0b\u5e8f\u53ef\u4ee5\u901a\u8fc7\u4e24\u79cd\u65b9\u6cd5\u4e2d\u7684\u4e00\u79cd\u6765\u63a5\u6536FAM\u4e8b\u4ef6\uff1a
\nSelect\u65b9\u6cd5
\n        \u4f60\u7684\u5e94\u7528\u7a0b\u5e8f\u6267\u884c\u4e00\u4e2aselect(2)\u5728\u4e00\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\u4e0a\uff0c\u8fd9\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\u5b58\u5728\u4e8eFAMOpen()\u8fd4\u56de\u7684FAMConnection\u7ed3\u6784\u4f53\u4e2d\u3002\u5f53\u8fd9\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\u53d8\u6210\u6fc0\u6d3b\u7684\uff0c\u5e94\u7528\u7a0b\u5e8f\u8c03\u7528FAMNextEvent()\u53bb\u68c0\u7d22\uff08\u53d6\u56deretrieve\uff09\u5373\u5c06\u5230\u6765\uff08pending\uff09\u7684FAM\u4e8b\u4ef6\u3002
\nPolling\u65b9\u6cd5
\n        \u4f60\u7684\u5e94\u7528\u7a0b\u5e8f\u5468\u671f\u6027\u7684\u8c03\u7528FAMPending()\uff08\u901a\u5e38\u4e3a\u7cfb\u7edf\u7b49\u5f85\u8f93\u5165\uff09\u3002\u5f53FAMPending\u8fd4\u56de\u4e00\u4e2a\u6b63\u6570\u7684\u503c\u65f6\uff0c\u4f60\u7684\u5e94\u7528\u7a0b\u5e8f\u547c\u53ebFAMNextEvent()\u53bb\u68c0\u7d22\uff08\u53d6\u56deretrieve\uff09\u968f\u540e\u7684\uff08pending\uff09FAM\u4e8b\u4ef6\u3002
\nFAMPending()\u6709\u7740\u5982\u4e0b\u7684\u8bed\u6cd5\uff1a
\n==============================================
\nint FAMPending(FAMConnection *fc)
\n==============================================
\n\u5982\u679c\u5b58\u5728\u4e00\u4e2aFAM\u4e8b\u4ef6\u961f\u5217\uff0c\u5219\u5b83\u8fd4\u56de1,\u5982\u679c\u6ca1\u6709FAM\u4e8b\u4ef6\u961f\u5217\u5219\u8fd4\u56de0,\u5982\u679c\u53d1\u751f\u9519\u8bef\u5219\u8fd4\u56de-1\u3002FAMPending()\u4e0d\u4f1a\u7b49\u5f85\u4e00\u4e2a\u4e8b\u4ef6\uff0c\u5b83\u5373\u65f6\u8fd4\u56de\u503c\u3002<\/p>\n

\u4e00\u65e6\u4f60\u786e\u5b9a\u5b58\u5728\u4e00\u4e2aFAM\u4e8b\u4ef6\u961f\u5217\uff0c\u4e0d\u8bba\u4f7f\u7528select\u65b9\u6cd5\u8fd8\u662fpolling\u65b9\u6cd5\uff0c\u90fd\u8c03\u7528FAMNextEvent()\u53bb\u63a5\u6536\uff08retrieve\uff09\u5b83\u3002
\n==============================================
\nint FAMNextEvent(FAMConnection *fc,FAMEvent *fe)
\n==============================================
\n\u5982\u679c\u6210\u529f\uff0cFAMNextEvent()\u8fd4\u56de0,\u5982\u679c\u5b58\u5728\u4e00\u4e2a\u9519\u8bef\u5219\u8fd4\u56de-1.FAMNextEvent()\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u7531FAMOpen()\u521d\u59cb\u5316\u7684FAMConnection\u7ed3\u6784\u4f53\u3002\u7b2c\u4e8c\u4e2a\u53c2\u6570\u662f\u4e00\u4e2a\u6307\u5411FAMEvent\u7ed3\u6784\u4f53\u7684\u6307\u9488\uff0c\u8fd9\u4e2a\u7ed3\u6784\u4f53\u7531FAMNextEvent()\u7528\u5173\u4e8eFAM\u4e8b\u4ef6\u7684\u4fe1\u606f\u586b\u5145\u3002FAMEvent\u7ed3\u6784\u4f53\u7684\u683c\u5f0f\u662f\uff1a
\n==============================================
\ntypedf struct{
\n        FAMConnection* fc;
\n        FAMRequest fr;
\n        char *hostname;
\n        char filename[PATH_MAX];
\n        void *userdata;
\n        FAMCodes code;
\n        }FAMEvent;
\n==============================================
\nfc\u662f\u7531FAMOpen()\u521d\u59cb\u5316\u7684FAMConnection\u7ed3\u6784\u4f53\u3002<\/p>\n

fr\u662f\u5f53\u4f60\u6240\u8981\u6c42\u88abFAM\u76d1\u89c6\u7684\u6587\u4ef6\u6216\u76ee\u5f55\u53d1\u751f\u6539\u53d8\u540e\uff0c\u7531FAMMonitorFile()\u6216FAMMonitorDirecotry()\u6240\u8fd4\u56de\u7684FAMRequest\u7ed3\u6784\u4f53\u3002<\/p>\n

hostname\u662f\u4e00\u4e2a\u5e9f\u65e7\u7684\u5b57\u6bb5\u3002\u4e0d\u8981\u5728\u4f60\u7684\u5e94\u7528\u7a0b\u5e8f\u91cc\u4f7f\u7528\u5b83\u3002<\/p>\n

filename\u662f\u88ab\u4f60\u6240\u76d1\u89c6\u7684\u6587\u4ef6\u6216\u76ee\u5f55\u7684\u5b8c\u6574\u7684\u8def\u5f84\u548c\u6587\u4ef6\u540d\u3002<\/p>\n

userdata\u662f\u5f53\u4f60\u8c03\u7528FAMMonitorFile()\u6216FAMMonitorDirectory()\u65f6\uff0c\u7531\u4f60\u63d0\u4f9b\u7684\u4e00\u4e2a\u5f3a\u5236\u6570\u636e\u7684\u6307\u9488\u3002\u5982\u679c\u4f60\u4f7f\u7528-2\u4f8b\u7a0bFAMMonitorDirector2()\u6216FAMMonitorFile2(),userdata\u662f\u6ca1\u6709\u5b9a\u4e49\u7684\u3002<\/p>\n

code\u662f\u7528\u4e8e\u63cf\u8ff0\u53d1\u751f\u6539\u53d8\u7684FAMCodes\u7684\u679a\u4e3e\u7c7b\u578b\u7684\u503c\uff0c\u5b83\u53ef\u4ee5\u91c7\u7528\u4ee5\u4e0b\u7684\u4efb\u610f\u503c\uff1a
\nFAMChanged      \u5173\u4e8e\u6587\u4ef6\u6216\u76ee\u5f55\u53ef\u4ee5\u83b7\u5f97\u7684\u6700\u540e\u6539\u53d8\u7684\u4e00\u4e9b\u503c
\nFAMDeleted      \u88ab\u76d1\u89c6\u7684\u6587\u4ef6\u6216\u76ee\u5f55\u88ab\u5220\u9664\u4e86\u3002
\nFAMStartExecuting \u4e00\u4e2a\u88ab\u76d1\u89c6\u7684\u53ef\u6267\u884c\u6587\u4ef6\u88ab\u6267\u884c\u4e86\uff0c\u8fd9\u4e2a\u4e8b\u4ef6\u4ec5\u4ec5\u5728\u6587\u4ef6\u88ab\u6267\u884c\u7684\u7b2c\u4e00\u65f6\u95f4\u88ab\u89e6\u53d1\u3002
\nFAMStopExecuting        \u4e00\u4e2a\u88ab\u76d1\u89c6\u7684\u53ef\u6267\u884c\u6587\u4ef6\u8fd0\u884c\u7ec8\u6b62\u4e86\u3002\u5982\u679c\u4e00\u4e2a\u53ef\u6267\u884c\u4ea7\u751f\u591a\u4e2a\u8fdb\u7a0b\uff0c\u5219\u8be5\u4e8b\u4ef6\u53ea\u5728\u6700\u540e\u4e00\u4e2a\u8fdb\u7a0b\u7ec8\u7ed3\u7684\u65f6\u5019\u4ea7\u751f\u3002
\nFAMCreated      \u4e00\u4e2a\u88ab\u76d1\u89c6\u7684\u76ee\u5f55\u4e2d\u88ab\u521b\u5efa\u4e86\u4e00\u4e2a\u6587\u4ef6\u3002
\nFAMAcknowledge  FAM\u4ea7\u751f\u4e00\u4e2aFAMAcknowledge\u4e8b\u4ef6\u6765\u54cd\u5e94\u4e00\u6b21FAMCancelMonitor()\u7684\u8c03\u7528\u3002\u5982\u679c\u4f60\u6307\u5b9a\u4e86\u4e00\u4e2a\u65e0\u6548\u7684\u8bf7\u6c42\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u4e00\u4e2a\u76f8\u5bf9\u8def\u5f84\uff0cFAM\u81ea\u52a8\u53d6\u6d88\u8fd9\u4e2a\u8bf7\u6c42\u5e76\u4e14\u7acb\u5373\u53d1\u9001\u4e00\u4e2aFAMAcknowledge\u4e8b\u4ef6\u3002
\nFAMExists       \u5f53\u5e94\u7528\u7a0b\u5e8f\u8bf7\u6c42\u7684\u90a3\u4e2a\u6587\u4ef6\u5df2\u7ecf\u88ab\u76d1\u89c6\uff0cFAM\u4e3a\u90a3\u4e2a\u6587\u4ef6\u4ea7\u751f\u4e00\u4e2aFAMExists\u4e8b\u4ef6\uff08\u5982\u679c\u6587\u4ef6\u5b58\u5728\u7684\u8bdd\uff09\u3002\u5f53\u4f60\u7684\u5e94\u7528\u7a0b\u5e8f\u8bf7\u6c42\u7684\u90a3\u4e2a\u76ee\u5f55\u5df2\u7ecf\u88ab\u76d1\u89c6\u65f6\uff0cFAM\u4e3a\u90a3\u4e2a\u76ee\u5f55\u4ee5\u53ca\u76ee\u5f55\u4e0b\u7684\u6bcf\u4e00\u4e2a\u6587\u4ef6\u4ea7\u751f\u4e00\u4e2aFAMExists\u4e8b\u4ef6\u3002
\nFAMEndExist     \u5f53\u5e94\u7528\u7a0b\u5e8f\u8bf7\u6c42\u7684\u6587\u4ef6\u6216\u76ee\u5f55\u88ab\u76d1\u89c6\u65f6\uff0cFAM\u5728\u6700\u540e\u4e00\u4e2aFAMExists\u4e8b\u4ef6\u540e\u4ea7\u751f\u4e00\u4e2aFAMEndExist\u4e8b\u4ef6\u3002\uff08\u6240\u4ee5\uff0c\u5982\u679c\u4f60\u76d1\u89c6\u4e00\u4e2a\u6587\u4ef6\uff0cFAM\u53ea\u4ea7\u751f\u4e00\u4e2aFAMExists\u4e8b\u4ef6\uff0c\u968f\u540e\u4ea7\u751fFAMEndExist\u4e8b\u4ef6\u3002\uff09
\n————————————————-
\n\u6ce8\u610f\uff1a\u5728IRIX 6.2\u4e4b\u524d\uff0cFAMNextEvent()\u6ca1\u6709\u5728FAMEndExist\u4e8b\u4ef6\u4e2d\u521d\u59cb\u5316filename\u5b57\u6bb5\u3002\u4f60\u5e94\u8be5\u4f7f\u7528\u8981\u6c42\u7801\u53bb\u5bfb\u627e\u4e8b\u4ef6\u6240\u53c2\u8003\u7684\u6587\u4ef6\u6216\u76ee\u5f55\u3002
\n————————————————-<\/p>\n

5\u7b26\u53f7\u94fe\u63a5<\/p>\n

\u5982\u679c\u4f60\u7ed9FAMMonitorDirector()\u6216FAMMonitorFile()\u6240\u6307\u660e\u7684\u8def\u5f84\u6587\u4ef6\u540d\u662f\u4e00\u4e2a\u7b26\u53f7\u94fe\u63a5\uff0cFAM\u4ec5\u4ec5\u76d1\u89c6\u7b26\u53f7\u94fe\u63a5\u81ea\u8eab\uff0c\u800c\u4e0d\u662f\u7b26\u53f7\u94fe\u63a5\u7684\u76ee\u6807\u3002\u867d\u7136\u903b\u8f91\u4e0a\u53ef\u80fd\u611f\u89c9\u5e94\u81ea\u52a8\u76d1\u89c6\u7b26\u53f7\u94fe\u63a5\u7684\u76ee\u6807\uff0c\u4f46\u8003\u8651\u5230\u5982\u679c\u76ee\u6807\u662f\u4e00\u4e2a\u81ea\u52a8\u6302\u8f7d\u7684\u6587\u4ef6\u7cfb\u7edf\uff0cmonitoring the target triggers and holds an automount\u3002\u53e6\u4e00\u4e2a\u7528\u76d1\u89c6\u94fe\u63a5\u81ea\u8eab\u4ee3\u66ff\u76ee\u6807\u7684\u7406\u7531\u662f\u76ee\u6807\u53ef\u80fd\u4e0d\u5b58\u5728\u3002<\/p>\n

\u6ca1\u6709\u4e00\u4e2a\u901a\u7528\u7684\u89e3\u51b3\u65b9\u6cd5\u6765\u5904\u7406\u76d1\u89c6\u7b26\u53f7\u94fe\u63a5\u7684\u76ee\u6807\u3002\u4f60\u53ef\u4ee5\u51b3\u5b9a\u4e00\u4e2a\u9002\u5408\u7684\u65b9\u6cd5\u7528\u4e8e\u4f60\u7684\u5e94\u7528\u7a0b\u5e8f\u53bb\u76d1\u89c6\u76ee\u6807\uff0c\u5373\u4f7f\u5b83\u662f\u81ea\u52a8\u6302\u8f7d\u7684\u3002
\n————————————————-
\n\u63d0\u793a\uff1a\u5f53\u4f60\u89e3\u51b3\u4e00\u4e2a\u8fde\u63a5\u5230\u94fe\u63a5\u7684\u6700\u7ec8\u76ee\u6807\u7684\u60c5\u5f62\u65f6\uff0clibc\u4f8b\u7a0brealpath(3C)\u975e\u5e38\u6709\u7528\u3002
\n————————————————-
\n————————————————-
\n\u63d0\u793a\uff1a\u4f7f\u7528statvfs(2)\u53bb\u8bc6\u522b\u4e00\u4e2a\u8fdc\u7a0b\u6587\u4ef6\u3002
\n————————————————-<\/p>\n

\u53e6\u4e00\u65b9\u9762\uff0c\u4e3a\u4e86\u907f\u514dtriggering and holding an automount\uff0c\u4f60\u53ef\u4ee5\u624b\u52a8\u7684\u8ffd\u8e2a\u7b26\u53f7\u94fe\u63a5\uff0c\u76f4\u5230\u8fbe\u5230\u4e00\u4e2a\u4f60\u53ef\u4ee5\u76d1\u89c6\u7684\u672c\u5730\u7684\u76ee\u6807\u3002\u5982\u679c\u76ee\u6807\u662f\u4e0d\u5b58\u5728\u7684\u6587\u4ef6\u7cfb\u7edf\uff0c\u90a3\u4e48\u4f60\u5e94\u8be5\u51b3\u5b9a\u4e0d\u53bb\u76d1\u89c6\u76ee\u6807\u3002\u53e6\u4e00\u4e2a\u9009\u62e9\u662f\u5bf9\u76ee\u6807\u8fdb\u884c\u4e00\u6b21\u6d4b\u8bd5\uff0c\u5982\u679c\u5b83\u5b58\u5728\uff08local\uff09\uff0cwhich triggers an automount only once if the target is automounted.<\/p>\n

\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u4e0b\u9762\u7684\u4f8b\u7a0b\u5224\u5b9a\u7ed9\u5b9a\u7684\u8def\u5f84\u662f\u4e00\u4e2a\u4e0d\u5b58\u7684\u3001\u4e0d\u7a33\u5b9a\u7684\u94fe\u63a5\u3001\u672c\u5730\u7684\u8fd8\u662f\u8fdc\u7a0b\u7684\u3002
\n=================================================
\n#include<errno.h>
\n#include<limits.h>
\n#include<stdlib.h>
\n#include<sys\/stat.h>
\n#include<sys\/statvfs.h>
\n\/*
\n * determine a file’s location
\n *\/
\nenum location {ERROR,NONEXISTENT,DANGLING,LOCAL,REMOTE};
\nenum location
\nfile_location(const char *path)
\n{
\n        char target_path[PATH_MAX];
\n        struct stat statbuf;
\n        struct statvfs svfsbuf;<\/p>\n

        if (!realpath(path,target_path))
\n        {
\n                \/*
\n                 *realpath failed — probably a permission problem,
\n                 *dangling link or nonexistent file.
\n                 *\/
\n                if (errno==EACCES)
\n                        return ERROR;
\n                if (lstat(path,&statbuf)==0)
\n                        return DANGLING;
\n                else if (errno==ENOENT)
\n                        return NONEXISTENT;
\n                else
\n                        return ERROR;
\n        }
\n        \/*
\n         * Realpath succeeded.Find out if file is local.
\n         *\/
\n        if (statvfs(target_path,&svfsbuf) <0)
\n                return ERROR;
\n        if (svfsbuf.f_flag &ST_LOCAL)
\n                return LOCAL;
\n        else
\n                return REMOTE;
\n}
\n=================================================<\/p>\n

6FAM\u4f8b\u5b50<\/p>\n

\u4e0b\u9762\u7684\u4f8b\u5b50\u5c55\u793a\u4e86\u5728\u67d0\u4e9b\u7279\u5b9a\u60c5\u5f62\u4e0bFAM\u53d1\u9001\u7684\u4e8b\u4ef6\u6d41\u3002<\/p>\n

\u4f8b\u5b50\uff1a\u4e00\u4e2a\u5ba2\u6237\u7aef\u76d1\u89c6\u4e00\u4e2a\u5b58\u5728\u7684\u6587\u4ef6\u3002\u7a0d\u540e\uff0c\u53e6\u5916\u4e00\u4e2a\u7a0b\u5e8f\u5728\u88ab\u76d1\u89c6\u7684\u6587\u4ef6\u4e0a\u8ffd\u52a0\u4e86\u6570\u636e\u3002\u518d\u968f\u540e\uff0c\u5ba2\u6237\u7aef\u53d6\u6d88\u4e86\u5bf9\u76d1\u89c6\u7684\u8bf7\u6c42\u3002
\n=================================================
\nUser calls      FAMMonitorFile(… "\/a\/b\/c"…)
\nFAM events:     FAMExists       \/a\/b\/c
\n                FAMEndExist     \/a\/b\/c<\/p>\n

Other program appends to file.
\nFAM event:      FAMChanged      \/a\/b\/c<\/p>\n

User calls      FAMCancelMonitor(…)
\nFAM event:      FAMAcknowledge  \/a\/b\/c
\n=================================================<\/p>\n

\u4f8b\u5b50\uff1a\u4e00\u4e2a\u5ba2\u6237\u7aef\u76d1\u89c6\u4e86\u4e00\u4e2a\u5305\u542b\u6709\u4e24\u4e2a\u6587\u4ef6\u7684\u76ee\u5f55\u3002\u7a0d\u540e\uff0c\u53e6\u4e00\u4e2a\u7a0b\u5e8f\u521b\u5efa\u4e86\u7b2c\u4e09\u4e2a\u6587\u4ef6\u3002
\n=================================================
\nUser calls      FAMMonitorDirectory(…"\/a\/b"…)
\nFAM events:     FAMExists       \/a\/b
\n                FAMExists       file_one
\n                FAMExists       file_two
\n                FAMEndExist     \/a\/b
\nThird file created.
\n                FAMCreated      file_three
\n=================================================<\/p>\n

\u4f8b\u5b50\uff1a\u4e00\u4e2a\u5ba2\u6237\u7aef\u76d1\u89c6\u4e00\u4e2a\u5df2\u7ecf\u6267\u884c\u7684\u53ef\u6267\u884c\u6587\u4ef6\u3002\u7a0d\u540e\uff0c\u8fd9\u4e2a\u7a0b\u5e8f\u9000\u51fa\u4e86\u3002
\n=================================================
\nUser calls      FAMMonitorFile(…"\/a\/b\/program"…)
\nFAM events:     FAMExists       \/a\/b\/program
\n                FAMEndExist     \/a\/b\/program
\n                FAMStartExecuting \/a\/b\/program
\nProgram exits.
\nFAM event:      FAMStopExecuting \/a\/b\/program
\n=================================================<\/p>\n

\u4f8b\u5b50\uff1a\u4e00\u4e2a\u5ba2\u6237\u7aef\u505a\u4e86\u4e00\u6b21\u65e0\u6548\u7684\u8bf7\u6c42\u3002
\n=================================================
\nUser calls      FAMMonitorDirectory(…"relative\/path"…)
\nFAM event:      FAMAcknowledge relative\/path
\n=================================================<\/p>\n

\u4f8b\u5b50\uff1a\u4e00\u4e2a\u5ba2\u6237\u7aef\u76d1\u89c6\u4e86\u4e00\u4e2a\u4e0d\u5b58\u5728\u7684\u6587\u4ef6\uff0c\u7a0d\u540e\uff0c\u53e6\u4e00\u4e2a\u7a0b\u5e8f\u521b\u5efa\u4e86\u8fd9\u4e2a\u6587\u4ef6\u3002
\n=================================================
\nUser calls      FAMMonitorFile(…"\/a\/b\/c"…)
\nFAM events:     FAMDeleted      \/a\/b\/c
\n                FAMEndExist
\nFile is created.
\nFAM event:      FAMCreated      \/a\/b\/c
\n=================================================<\/p>\n

\u4f8b\u5b50\uff1a\u4e00\u4e2a\u5ba2\u6237\u7aef\u76d1\u89c6\u4e00\u4e2a\u542b\u6709\u4e00\u4e9b\u6587\u4ef6\u7684\u76ee\u5f55\u3002\u53e6\u4e00\u4e2a\u7a0b\u5e8f\u5220\u9664\u4e86\u8fd9\u4e2a\u76ee\u5f55\uff0c\u7136\u540e\u53c8\u521b\u5efa\u4e86\u4e00\u4e2a\u548c\u6539\u76ee\u5f55\u540c\u540d\u7684\u6587\u4ef6\u3002
\n=================================================
\nUser calls      FAMMonitorDirectory(…"\/a\/b"…)
\nFAM events:     FAMExists       \/a\/b
\n                FAMExists       file_one
\n                FAMExists       file_two
\n                FAMEndExist     \/a\/b
\nDirectory and files are deleted.
\nFAM events:     FAMDeleted      \/a\/b
\n                FAMChanged      \/a\/b
\n                FAMDeleted      file_one
\n                FAMDEleted      file_two
\nFile with same name created.
\nFAM events:     FAMCreated      \/a\/b
\n                FAMChanged      \/a\/b
\n================================================<\/p>\n

7\u4f7f\u7528FAM<\/p>\n

\u5982\u540c\u201c\u4fa6\u6d4b\u6587\u4ef6\u548c\u76ee\u5f55\u7684\u6539\u53d8\u201d\u91cc\u5199\u7684\uff0c\u4f60\u7684\u5e94\u7528\u7a0b\u5e8f\u53ef\u4ee5\u68c0\u67e5\u901a\u8fc7\u4e24\u79cd\u65b9\u6cd5\u76d1\u89c6\u7684\u6587\u4ef6\u548c\u76ee\u5f55\u7684\u53d8\u5316\u3002<\/p>\n

        \u00d7\u4f7f\u7528select()\u53bb\u7b49\u5f85\u76f4\u5230FAM socket\u6fc0\u6d3b\uff0c\u6307\u660e\u4e00\u4e2a\u6539\u53d8\uff0c\u5b83\u88ab\u63cf\u8ff0\u5728\u201c\u7b49\u5f85\u6587\u4ef6\u6539\u53d8\u201d\u3002<\/p>\n

        \u00d7\u4f7f\u7528FAMPending()\u53bb\u5468\u671f\u7684\u67e5\u8be2\uff08poll\uff09FAM\uff0c\u5b83\u88ab\u89e3\u91ca\u5728\u201c\u8f6e\u8be2\uff08Polling)\u6587\u4ef6\u6539\u53d8\u201d<\/p>\n

\u8fd9\u4e00\u8282\u63cf\u8ff0\u4e86\u5982\u4f55\u4f7f\u7528\u8fd9\u4e24\u79cd\u65b9\u6cd5\u3002<\/p>\n

7.1\u7b49\u5f85\u6587\u4ef6\u6539\u53d8<\/p>\n

\u5728\u4f60\u7684\u5e94\u7528\u7a0b\u5e8f\u4e2d\u4f7f\u7528\u4e0b\u9762\u7684\u6b65\u9aa4\uff0c\u4f7f\u7528\u7684\u662fselect\u65b9\u53d1\u53bb\u68c0\u6d4b\u6587\u4ef6\u7684\u6539\u53d8\u3002<\/p>\n

        1.\u8c03\u7528FAMOpen()\u521b\u5efa\u4e00\u4e2a\u5230fam\u7684\u8fde\u63a5\u3002\u8fd9\u4e2a\u4f8b\u7a0b\u8fd4\u56de\u4e00\u4e2a\u5c06\u88ab\u7528\u4e8e\u6240\u6709FAM\u8fdb\u7a0b\u7684FAMConnection\u7ed3\u6784\u4f53\u3002
\n        2.\u8c03\u7528FAMMonitorFile()\u548cFAMMonitorDirectory()\u53bb\u544a\u77e5fam\u54ea\u4e9b\u6587\u4ef6\u548c\u76ee\u5f55\u88ab\u76d1\u89c6\u3002
\n        3.\u5f53fam socket\u662f\u53ef\u8bfb\u65f6\uff0c\u9009\u62e9\u5728fam socket\u4e0a\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u5e76\u8c03\u7528FAMNextEvent()\u3002
\n        4.\u5f53\u5e94\u7528\u7a0b\u5e8f\u5b8c\u6210\u5bf9\u4e00\u4e2a\u6587\u4ef6\u6216\u76ee\u5f55\u7684\u76d1\u89c6\uff0c\u8c03\u7528FAMCancelMonitor()\u3002\u5982\u679c\u4f60\u60f3\u4e34\u65f6\u6682\u505c\u76d1\u89c6\u4e00\u4e2a\u6587\u4ef6\u6216\u76ee\u5f55\uff0c\u8c03\u7528FAMSuspendMonitor()\u3002\u5f53\u4f60\u51c6\u5907\u518d\u6b21\u5f00\u59cb\u76d1\u89c6\u65f6\uff0c\u8c03\u7528FAMResumeMonitor()\u3002
\n        5.\u5f53\u5e94\u7528\u7a0b\u5e8f\u4e0d\u518d\u9700\u8981\u5bf9\u6587\u4ef6\u548c\u76ee\u5f55\u76d1\u89c6\u65f6\uff0c\u8c03\u7528FAMClose()\u53bb\u91ca\u653e\u4e0e\u6587\u4ef6\u88ab\u76d1\u89c6\u7684\u76f8\u5173\u7684\u8d44\u6e90\u3002\u5173\u95ed\u5230fam\u7684\u8fde\u63a5\uff0c\u8fd9\u4e00\u6b65\u662f\u53ef\u9009\u7684\uff0c\u5982\u679c\u4f60\u7b80\u5355\u7684\u9000\u51fa\u4f60\u7684\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n

\u4f8b\u5b508-1\u5728\u4e00\u4e2a\u7b80\u5355\u7684\u7a0b\u5e8f\u4e2d\u6f14\u793a\u4e86\u8fd9\u4e00\u8fc7\u7a0b\u3002<\/p>\n

\u4f8b\u5b508-1.\u5bf9FAM\u4f7f\u7528Select
\n===================================================
\n\/*
\n * monitor.c–monitor arbitrary file or directory using fam
\n *\/
\n#include <fam.h>
\n#include <stdio.h>
\n#include <stdlib.h>
\n#include <sys\/stat.h>
\n#include <sys\/select.h><\/p>\n

\/*event_name() – return printable name of fame event code *\/<\/p>\n

const char *event_name(int code)
\n{
\n        static const char *famevent[]={
\n                "",
\n                "FAMDeleted",
\n                "FAMStartExecuting",
\n                "FAMStopExecuting",
\n                "FAMCreated",
\n                "FAMMoved",
\n                "FAMAcknowledge",
\n                "FAMExists",
\n                "FAMEndExist"
\n        };
\n        static char unknow_event[10];<\/p>\n

        if (code < FAMChaged || code > FAMEndExist)
\n        {
\n                sprintf(unknow_event,"unknow (%d)",code);
\n                return unknown_event;
\n        }
\n        return famevent ;
\n}<\/p>\n

void main(int argc,char *argv[])
\n{
\n        int i,nmon,rc,fam_fd;
\n        FAMConnection fc;
\n        FAMRequest *frp;
\n        struct stat status;
\n        fd_set readfds;<\/p>\n

        \/*Allocate storage for requests *\/<\/p>\n

        frp=malloc(argc * sizeof *frp);
\n        if (!frp)
\n        {
\n                perror("malloc");
\n                exit(1);
\n        }<\/p>\n

        \/* Open fam connection *\/<\/p>\n

        if ((FAMOpen(&fc)) < 0)
\n        {
\n                perror("fam");
\n                exit(1);
\n        }<\/p>\n

        \/*Reuqest monitoring for each program argument *\/<\/p>\n

        for (nmon=0,i=1;i<argc;i++)
\n        {
\n                if (stat(argv[i],&status) < 0)
\n                {
\n                        perror(argv[i]);
\n                        status.st_mode=0;
\n                }
\n                if ((status.st_mode & S_IFMT)==S_IFDIR)
\n                        rc=FAMMonitorDirectory(&fc,argv[i],frp+i,NULL);
\n                else
\n                        rc=FAMMonitorFile(&fc,argv[i],frp+i,NULL);
\n                if (rc < 0)
\n                {
\n                        perror("FAMMonitor failed");
\n                        continue;
\n                }
\n                nmon++;
\n        }
\n        if (!nmon)
\n        {
\n                fprintf(stderr,"Nothing monitored.n");
\n                exit(1);
\n        }<\/p>\n

        \/*Initialize select data structure *\/
\n        fam_fd=FAMCONNECTION_GETfd(&fc);
\n        FD_ZERO(&readfds);
\n        FD_SET(fam_fd,&readfds);<\/p>\n

        \/*Loop forever. *\/tic char unknow_even<\/p>\n

        while(1)
\n        {
\n                if (select(fam_fd + 1,&readfds,NULL,NULL,NULL) < 0)
\n                {
\n                        perror("select failed");
\n                        exit(1);
\n                }
\n                if (FD_ISSET(fam_fd,&readfds))
\n                {
\n                        if (FAMNextEvent(&fc,&fe) < 0)
\n                        {
\n                                perror("FAMNextEvent");
\n                                exit(1);
\n                        }
\n                        printf("%-24s %sn",fe.filename,event_name(fe.code));
\n                }
\n        }
\n}
\n================================================<\/p>\n

7.2\u8f6e\u8be2\uff08Polling\uff09\u6587\u4ef6\u6539\u53d8<\/p>\n

\u5728\u4f60\u7684\u5e94\u7528\u7a0b\u5e8f\u4e2d\u9075\u5faa\u4e0b\u9762\u7684\u6b65\u9aa4\u4f7f\u7528FAM\uff0c\u4f7f\u7528\u7684\u662f\u8f6e\u8be2\u7684\u65b9\u6cd5\u53bb\u4fa6\u6d4b\u6587\u4ef6\u7684\u6539\u53d8\u3002<\/p>\n

        1.\u8c03\u7528FAMOpen()\u53bb\u521b\u5efa\u4e00\u4e2a\u5230fam\u7684\u8fde\u63a5\u3002\u8fd9\u4e2a\u4f8b\u7a0b\u8fd4\u56de\u4e00\u4e2a\u4ee5\u540e\u6240\u6709FAM\u8fdb\u7a0b\u90fd\u8981\u7528\u5230\u7684FAMConnection\u7ed3\u6784\u4f53\u3002
\n        2.\u8c03\u7528FAMMonitorFile()\u548cFAMMonitorDirectory()\u53bb\u544a\u77e5fam\u54ea\u4e9b\u6587\u4ef6\u548c\u76ee\u88ab\u76d1\u89c6\u3002
\n        3.\u5f53\u6709\u4e00\u4e2apending FAM\u4e8b\u4ef6\u65f6\uff0c\u8c03\u7528FAMPending()\u53bb\u76d1\u6d4b\uff0c\u5982\u679c\u4e00\u4e2a\u4e8b\u4ef6\u88ab\u4fa6\u6d4b\u5230\uff0c\u5219\u8c03\u7528FAMNextEvent()\u3002
\n        4.\u5f53\u5e94\u7528\u7a0b\u5e8f\u5b8c\u6210\u76d1\u89c6\u4e00\u4e2a\u6587\u4ef6\u6216\u76ee\u5f55\u65f6\uff0c\u8c03\u7528FAMCancelMonitor()\u3002\u5982\u679c\u60f3\u4e34\u65f6\u6682\u505c\u5bf9\u4e00\u4e2a\u6587\u4ef6\u6216\u76ee\u5f55\u7684\u76d1\u89c6\uff0c\u8c03\u7528FAMSuspendMonitor()\u3002\u5f53\u4f60\u51c6\u5907\u518d\u6b21\u5f00\u59cb\u76d1\u89c6\u65f6\uff0c\u8c03\u7528FAMResumeMonitor()\u3002
\n        5.\u5f53\u5e94\u7528\u7a0b\u5e8f\u4e0d\u518d\u9700\u8981\u76d1\u89c6\u6587\u4ef6\u548c\u76ee\u5f55\u65f6\uff0c\u8c03\u7528FAMClose()\u53bb\u91ca\u653e\u6587\u4ef6\u88ab\u76d1\u89c6\u65f6\u7684\u76f8\u5173\u8d44\u6e90\u5e76\u4e14\u5173\u95ed\u5230fam\u7684\u8fde\u63a5\u3002\u8fd9\u4e00\u6b65\u662f\u53ef\u9009\u7684\uff0c\u5982\u679c\u4f60\u7b80\u5355\u7684\u63a8\u51fa\u4f60\u7684\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n

\u4e3e\u4f8b\uff0c\u4f60\u53ef\u4ee5\u901a\u8fc7\u5220\u9664\u6389\u4f8b8-1\u4e2d\u5173\u4e8eselect data structure\u7684\u4ee3\u7801\u5e76\u4e14\u7528\u4f8b8-2\u4e2d\u7684\u4ee3\u7801\u66ff\u6362\u8c03while loop\u6765\u5728monitor.c\u7a0b\u5e8f\u4e2d\u4f7f\u7528\u8f6e\u8be2\uff08polling\uff09\u65b9\u6cd5\u3002\u8fd9\u4e2a\u7b80\u5355\u7684\u7a0b\u5e8f\u6f14\u793a\u4e86\u8fd9\u4e2a\u8fc7\u7a0b\u3002<\/p>\n

\u4f8b8-2.\u5bf9FAM\u4f7f\u7528Polling\u65b9\u6cd5
\n==================================================
\nwhile(1)
\n{
\n        rc=FAMPending(&fc);
\n        if (rc ==0)
\n                break;
\n        else if(rc==-1)
\n                perror ("FAMPending");
\n        if (FAMNextEvent(&fc,&fe) < 0)
\n        {
\n                perror ("FAMNextEvent");
\n                exit(1);
\n        }
\n        printf("%-24s %sn",fe.filename,event_name(fe.code));
\n}
\n==================================================<\/p>\n

\u5f53\u4f60\u60f3\u8981\u5728Xt\u5de5\u4f5c\u8fc7\u7a0b\u4e2d\u4f7f\u7528\u8f6e\u8be2\u6765\u67e5\u8be2\u6539\u53d8\uff0c\u8fd9\u662f\u4e00\u4e2a\u975e\u5e38\u6709\u7528\u7684\u65b9\u6cd5\u3002\u4f8b8-3\u73b0\u5b9e\u4e86\u8fd9\u79cd\u5de5\u4f5c\u8fc7\u7a0b\u7684\u57fa\u672c\u4ee3\u7801\u3002<\/p>\n

\u4f8b8-3.\u5728Xt\u5de5\u4f5c\u8fc7\u7a0b\u4e2d\u4f7f\u7528\u8f6e\u8be2FAM
\n==================================================
\nBoolean monitorFiles(XtPointer clientData)
\n{
\n        int rc=FAMPending(&fc);<\/p>\n

        if (rc == 0)
\n                return(FALSE);
\n        else if (rc == -1)
\n                XtAppError(app_context,"FAMPending error");<\/p>\n

        if (FAMNextEvent(&fc,&fe) < 0)
\n        {
\n                XtAppError(app_context,"FAMNextEvent error");
\n        }<\/p>\n

        handleFileChange(fe);
\n        return(FALSE);
\n}
\n===================================================<\/p>\n","protected":false},"excerpt":{"rendered":"

\/*************************************************\/ \/*\u672c\u6587\u6863\u7531\u9e3f\u5251\u9752\u7ffb\u8bd1\uff0c\u539f\u59cb\u82f1\u6587\u6587\u6863\u5728             *\/ \/*http:\/\/techpubs.sgi.com\/library\/tpl\/c*\/ \/*i-bin\/getdoc.cgi\/0650\/bks\/SGI_Develop*\/ \/*er\/books\/IIDsktp_IG\/sgi_html\/ch08.htm*\/ \/*l#LE29093-PARENT                     *\/ \/*\u65e5\u671f\uff1a2005\u5e748\u670831\u65e5                            *\/ \/*\u53cc\u6a2a\u7ebf\u4e2d\u7684\u5185\u5bb9\u672a\u4ee3\u7801 *\/ \/*\u5355\u6a2a\u7ebf\u4e2d\u7684\u5185\u5bb9\u4e3a\u63d0\u793a\u6216\u6ce8\u610f\u4e8b\u9879 *\/ \/*\u81ea\u5df1\u7ffb\u8bd1\u7684\uff0c\u5982\u6709\u95ee\u9898\u8bf7\u6307\u6b63\uff0c\u8c22\u8c22\uff01 *\/ \/*************************************************\/ FAM\u63a5\u53e3 \u8fd9\u4e00\u8282\u63cf\u8ff0\u4e86\u4f60\u7684\u5e94\u7528\u7a0b\u5e8f\u8fde\u63a5\u5230FAM\u6240\u4f7f\u7528\u7684\u51fd\u6570\u3002 1\u6253\u5f00\u548c\u5173\u95ed\u4e00\u4e2aFAM\u8fde\u63a5 \u51fd\u6570FAMOpen()\u6253\u5f00\u4e00\u4e2a\u5230fam\u7684\u8fde\u63a5\u3002 ======================================= int FAMOpen(FAMConnection* fc) ======================================= \u5982\u679c\u6210\u529f\uff0cFAMOpen()\u8fd4\u56de0,\u5982\u679c\u5931\u8d25\uff0c\u5219\u8fd4\u56de-1\u3002FAMOpen()\u521d\u59cb\u5316\u7684FAMConnection\u7ed3\u6784\u4f53\u5c06\u88ab\u7528\u4e8e\u4f20\u9012\u7ed9\u6240\u6709\u5728\u4f60\u5e94\u7528\u7a0b\u5e8f\u4e2d\u88ab\u8c03\u7528\u7684FAM\u5b50\u8fdb\u7a0b\u3002 FAMConnection\u7ed3\u6784\u4f53\u4e2d\u6709\u4e00\u4e2a\u57fa\u672c\u7684\u5143\u7d20\uff0c\u5b83\u662fFAM\u7528\u6765\u548c\u4f60\u7684\u5e94\u7528\u7a0b\u5e8f\u8fdb\u884c\u901a\u4fe1\u7684\u63a5\u53e3\uff08socket\uff09\u7684\u76f8\u5173\u6587\u4ef6\u63cf\u8ff0\u7b26\u3002\u4f60\u9700\u8981\u8fd9\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\u5728socket\u4e0a\u6267\u884cselect()\u64cd\u4f5c\u3002\u4f60\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528FAMCONNECTION_GETFD()\u5b8f\u6765\u83b7\u5f97\u8fd9\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26\u3002 ======================================= FAMCONNECTION_GETFD(fc) ======================================= \u51fd\u6570FAMOpen2\u544a\u8bc9FAM\u5e94\u7528\u7a0b\u5e8f\u7684\u540d\u5b57 ======================================= int FAMOpen2(FAMConnection* fc, const char* appName) ======================================= \u5f53FAM\u6253\u5370\u51fa\u9519\u4fe1\u606f\u7684\u65f6\u5019\u4f1a\u4f7f\u7528\u5230\u5e94\u7528\u7a0b\u5e8f\u540d\uff08appName\uff09 \u51fd\u6570FAMClose()\u5173\u95ed\u4e00\u4e2a\u5230fam\u7684\u8fde\u63a5 ======================================= int FAMClose(FAMConnection* fc) ======================================= \u5982\u679c\u6210\u529f\uff0cFAMClose()\u8fd4\u56de0,\u5426\u5219\u8fd4\u56de-1. 2\u76d1\u89c6\u4e00\u4e2a\u6587\u4ef6\u6216\u76ee\u5f55 FAMMonitorDirecotry()\u548cFAMMonitorFile()\u5206\u522b\u544a\u8bc9FAM\u5f00\u59cb\u7684\u76d1\u89c6\u4e00\u4e2a\u76ee\u5f55\u548c\u6587\u4ef6\u3002 ======================================= int FAMMonitorDirecotry(FAMConnection *fc,char *filename,FAMRequest* fr,void* userData) int FAMMonitorFile(FAMConnection *fc,char *filename,FAMRequest* fr,void* userData) ====================================== FAMMonitorDirectory()\u4e0d\u4ec5\u4ec5\u76d1\u89c6\u6307\u5b9a\u7684\u76ee\u5f55\u6587\u4ef6\u672c\u8eab\u7684\u53d8\u5316\uff0c\u8fd8\u76d1\u89c6\u8be5\u76ee\u5f55\u4e0b\u6587\u4ef6\u7684\u53d8\u5316\u3002\u5982\u679c\u8be5\u76ee\u5f55\u5305\u542b\u6709\u5b50\u76ee\u5f55\uff0c\u5219FAMMonitorDirecotry()\u4ec5\u4ec5\u53ea\u76d1\u89c6\u8fd9\u4e9b\u5b50\u76ee\u5f55\u7684\u53d8\u5316\uff0c\u800c\u4e0d\u76d1\u89c6\u8fd9\u4e9b\u5b50\u76ee\u5f55\u4e0b\u6587\u4ef6\u548c\u76ee\u5f55\u7684\u53d8\u5316\u3002FAMMonitorFile()\u4ec5\u4ec5\u53ea\u663e\u793a\u6307\u5b9a\u6587\u4ef6\u53d1\u751f\u4e86\u4ec0\u4e48\u53d8\u5316\u3002\u8fd9\u4e24\u4e2a\u51fd\u6570\u5728\u6210\u529f\u540e\u90fd\u8fd4\u56de0,\u5426\u5219\u90fd\u8fd4\u56de-1. \u8fd9\u4e9b\u51fd\u6570\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u88abFAMOpen()\u521d\u59cb\u5316\u7684FAMConnection\u7ed3\u6784\u4f53\u3002\u7b2c\u4e8c\u4e2a\u53c2\u6570\u662f\u8981\u88ab\u76d1\u89c6\u7684\u76ee\u5f55\u6216\u6587\u4ef6\u7684\u5168\u8def\u5f84\u53ca\u540d\u79f0\u3002\u6ce8\u610f\uff0c\u4e0d\u80fd\u4f7f\u7528\u76f8\u5bf9\u8def\u5f84\u3002 \u7b2c\u4e09\u4e2a\u53c2\u6570\u662f\u8fd9\u4e24\u4e2a\u51fd\u6570\u521d\u59cb\u5316\u7684\u4e00\u4e2aFAMRequest\u7ed3\u6784\u4f53\u3002\u4f60\u53ef\u4ee5\u4f20\u9012\u8fd9\u4e2a\u7ed3\u6784\u4f53\u7ed9FAMSuspendMonitor(),FAMResumeMonitor()\u6216FAMCancelMonitor()\u53bb\u5206\u522b\u6682\u505c\u3001\u6062\u590d\u6216\u53d6\u6d88\u5bf9\u6587\u4ef6\u6216\u76ee\u5f55\u7684\u76d1\u89c6\u3002 \u7b2c\u56db\u4e2a\u53c2\u6570\u662f\u4e00\u4e2a\u6307\u9488\uff0c\u8fd9\u4e2a\u6307\u9488\u6307\u5411\u4e86\u5f53\u4e00\u4e2a\u6587\u4ef6\u6216\u76ee\u5f55\u6539\u53d8\u65f6\uff0c\u4f60\u6240\u60f3\u8981\u5305\u542b\u8fdb\u7531FAMNextEvent()\u8fd4\u56de\u7684FAMEvent\u7ed3\u6784\u4f53\u4e2d\u7684\u4e00\u4e2a\u5f3a\u5236\uff08arbitrary\uff09\u7528\u6237\u6570\u636e\u3002 \u4e0d\u8bba\u4f55\u65f6\uff0c\u5f53FAM\u4fa6\u6d4b\u5230\u6240\u76d1\u89c6\u7684\u6587\u4ef6\u6216\u76ee\u5f55\u6539\u53d8\u65f6\uff0cFAM\u4ea7\u751fFAM\u4e8b\u4ef6\u3002 \u4e24\u4e2a\u76f8\u4f3c\u7684\u4f8b\u7a0b\u662fFAMMonitorDirectory2()\u548cFAMMonitorFile2(): =============================================== int FAMMonitorDirectory2(FAMConnection *fc,char *filename,FAMrequest* fr); int FAMMonitorFiles2(FAMConnection *fc,char *filename,FAMRequet* fr); =============================================== \u5728\u8fd9\u4e24\u4e2a\u4f8b\u7a0b\u4e2d\uff0c\u8c03\u7528\u8005\u6311\u9009\u8bf7\u6c42\u53f7\u7801\uff0c\u800c\u4e0d\u662flibfam,\u8c03\u7528\u8005\u5728\u8c03\u7528\u4e4b\u524d\u901a\u8fc7\u628a\u8981\u6c42\u7684\u53f7\u7801\u653e\u7f6e\u5728FAMRequest\u4e2d\u6765\u6307\u5b9a\u6240\u8981\u6c42\u7684\u53f7\u7801\u3002\u6bd4\u5982\uff1a =============================================== FAMConnection fc; FAMRequest frq; … frq.reqnum=some_number_associated_with_tmp; 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