{"id":258,"date":"2025-08-15T18:25:54","date_gmt":"2025-08-15T10:25:54","guid":{"rendered":"http:\/\/www.tgwttt.xyz\/?p=258"},"modified":"2025-11-24T16:38:33","modified_gmt":"2025-11-24T08:38:33","slug":"%e5%91%bd%e5%90%8d%e7%ae%a1%e9%81%93%e7%9a%84%e6%93%8d%e4%bd%9c%e5%92%8c%e4%bd%bf%e7%94%a8","status":"publish","type":"post","link":"https:\/\/www.tgwttt.xyz\/?p=258","title":{"rendered":"\u547d\u540d\u7ba1\u9053\u7684\u64cd\u4f5c\u548c\u4f7f\u7528"},"content":{"rendered":"\n<p>\u4ee3\u7801\u4ed3\u5e93\uff1a<a href=\"https:\/\/gitee.com\/tgwTTT\/linux-learning-dai\/tree\/master\/fifotest\">https:\/\/gitee.com\/tgwTTT\/linux-learning-dai\/tree\/master\/fifotest<\/a><\/p>\n\n\n\n<p id=\"u6d12d4fa\"><strong>\u533f\u540d\u7ba1\u9053\uff1a<\/strong><\/p>\n\n\n\n<p id=\"ue5610723\">1.\u53ea\u80fd\u7528\u4e8e\u5177\u6709\u8840\u7f18\u5173\u7cfb\u7684\u8fdb\u7a0b\u8fdb\u884c\u8fdb\u7a0b\u95f4\u901a\u4fe1\uff08\u5e38\u7528\u4e8e\u7236\u5b50\uff09<\/p>\n\n\n\n<p id=\"u9cee2ece\">\u601d\u8003\uff1a\u5982\u679c\u4e24\u4e2a\u8fdb\u7a0b\u4e0d\u76f8\u5173\uff0c\u6539\u5982\u4f55\u8fdb\u884c\u901a\u4fe1<\/p>\n\n\n\n<p id=\"ued3eaf8d\">\u5982\uff1a\u8fdb\u7a0ba\u6253\u5f00\u4e86\u4e00\u4e2a\u6587\u4ef6a<\/p>\n\n\n\n<p id=\"u44ba5066\">\u8fdb\u7a0bb\u4e5f\u6253\u5f00\u4e86\u6587\u4ef6a<\/p>\n\n\n\n<p id=\"u452adf43\">\u5185\u6838\u4e2d\uff0c\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u4e0d\u4f1a\u6253\u6587\u4ef6a\u5728\u5185\u5b58\u4e2d\u52a0\u8f7d\u4e24\u6b21<\/p>\n\n\n\n<p id=\"u586db606\">\u7b54\u6848\u662f\uff1a\u4e0d\u4f1a\uff01\uff01<\/p>\n\n\n\n<p>\u8fd9\u4e5f\u4e3a\u6211\u4eec\u547d\u540d\u7ba1\u9053\u5960\u5b9a\u57fa\u7840\uff0c\u662f\u5728\u4e24\u4e2a\u6587\u4ef6\u91cc\u9762\u8fdb\u884c\u901a\u4fe1\u8bfb\u53d6<\/p>\n\n\n\n<p><strong>\u547d\u540d\u7ba1\u9053\uff08Named Pipe\uff0c\u4e5f\u53eb FIFO\uff09\uff1a<\/strong><\/p>\n\n\n\n<p>\u662f\u4e00\u79cd \u4ee5\u6587\u4ef6\u5f62\u5f0f\u5b58\u5728\u4e8e\u6587\u4ef6\u7cfb\u7edf\u4e2d \u7684\u8fdb\u7a0b\u95f4\u901a\u4fe1\uff08IPC\uff09\u673a\u5236\u3002\u4e0e\u533f\u540d\u7ba1\u9053\u53ea\u80fd\u7528\u4e8e \u4eb2\u7f18\u8fdb\u7a0b \u4e0d\u540c\uff0c\u547d\u540d\u7ba1\u9053\u5141\u8bb8\u4efb\u610f\u4e24\u4e2a\u65e0\u4eb2\u7f18\u5173\u7cfb\u7684\u8fdb\u7a0b \u901a\u8fc7\u7ea6\u5b9a\u597d\u7684\u8def\u5f84\u4ea4\u6362\u6570\u636e\u3002<\/p>\n\n\n\n<p id=\"u4505b575\">\u8fd9\u662flinux\u4e2d\u7684\u4e00\u79cd\u7279\u6b8a\u6587\u4ef6\u7ba1\u9053\u6587\u4ef6\uff0c\u4ed6\u4e0d\u9700\u8981\u5c06\u5185\u5b58\u5237\u65b0\u5230\u78c1\u76d8\uff0c\u53ea\u9700\u8981\u53bb\u6253\u5f00\u8bfb\u53d6<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/cdn.nlark.com\/yuque\/0\/2025\/png\/50466557\/1755217090339-98c9b857-89d4-4cbb-a5f7-2de33c79edb1.png\" alt=\"\" title=\"\"\/><\/figure>\n\n\n\n<p id=\"uc9f1f00c\">mkfifo\uff1a\u521b\u5efa\u4e00\u4e2a\u7ba1\u9053\u6587\u4ef6<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int ret = mkfifo(\"\/tmp\/myfifo\", 0666);\n    if (ret == -1) perror(\"mkfifo\");\n    return 0;<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u6253\u5f00\u89c4\u5219\u4e0e\u963b\u585e\u884c\u4e3a<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>open \u6a21\u5f0f<\/th><th>\u884c\u4e3a\u8bf4\u660e<\/th><\/tr><\/thead><tbody><tr><td>O_RDONLY<\/td><td>\u963b\u585e\u76f4\u5230\u6709\u5199\u7aef\u6253\u5f00<\/td><\/tr><tr><td>O_WRONLY<\/td><td>\u963b\u585e\u76f4\u5230\u6709\u8bfb\u7aef\u6253\u5f00<\/td><\/tr><tr><td>O_NONBLOCK<\/td><td>\u7acb\u5373\u8fd4\u56de\uff0c\u82e5\u65e0\u5bf9\u5e94\u7aef\u5219 open \u5931\u8d25(errno=ENXIO)<\/td><\/tr><tr><td>\u4e0d\u80fd\u7528 O_RDWR<\/td><td>\u4f1a\u8bfb\u56de\u81ea\u5df1\u5199\u7684\u6570\u636e\uff0c\u5931\u53bb\u7ba1\u9053\u610f\u4e49<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u4e0b\u9762\u662f\u5b9e\u73b0\u4e00\u4e2a\u7b80\u5355\u7684\u7ba1\u9053\u901a\u4fe1\u7684\u4f8b\u5b50\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>class IpcFifo\n{\n    public:\n    IpcFifo(const std::string& path,const std::string &name)\n    :_path(path),_name(name)\n    {\n        _fifoname=_path+\"\/\"+_name;\n        umask(0);\n        \/\/\u65b0\u5efa\u7ba1\u9053\n        int n=mkfifo(_fifoname.c_str(),0666);\n        if(n!=0){\n        std::cerr<<\"mkfifo error\"<<std::endl;\n        }\n        else{\n            std::cout<<\"mkfifo successful\"<<std::endl;\n        }\n    }\n    ~IpcFifo(){\n       int n=unlink(_fifoname.c_str());\n       if(n!=0){\n        std::cerr<<\"unlink error\"<<std::endl;\n       }\n    }\n    private:\n        std::string _path;\n        std::string _name;\n        std::string _fifoname=_path+\"\/\"+_name;\n};<\/code><\/pre>\n\n\n\n<p>\u4e0a\u9762\u7684\u7c7b\u4e3b\u8981\u662f\u4e00\u4e2a\u7ba1\u9053\u6587\u4ef6\u7684\u521b\u5efa\u548c\u9500\u6bc1<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>class FileOper\n{\n    public:\n    FileOper(const std::string& path,const std::string &name)\n     :_path(path),_name(name),_fd(-1)\n     {\n         _fifoname=_path+\"\/\"+_name;\n     }\n     ~FileOper(){}\n    void OpenForRead(){\n         _fd=open(_fifoname.c_str(),O_RDONLY);\n        if(_fd<0){\n            std::cerr<<\"open error\"<<std::endl;\n        }\n        else{\n            std::cout<<\"open successful\"<<std::endl;\n        }\n    }\n    void OpenForWrite(){\n        _fd=open(_fifoname.c_str(),O_WRONLY);\n        if(_fd<0){\n            std::cerr<<\"open error\"<<std::endl;\n        }\n        else{\n            std::cout<<\"open successful\"<<std::endl;\n        }\n    }\n    void Write(){\n        int cnt=1;\n   pid_t pid=getpid();\n   while(true){\n    std::string message;\n    std::cout<<\"please enter message:\";\n    std::getline(std::cin,message); \n    message+=\",message number:\"+std::to_string(cnt++)+\n    \"[\"+std::to_string(pid)+\"]\";\n    int n=write(_fd,message.c_str(),message.size());\n    if(n>0){\n        std::cout<<\"send sucessful\"<<std::endl;\n    }\n   }\n    };\n    void Read(){\n        char buffer[1024];\n        while(true){\n        int n=read(_fd,buffer,sizeof(buffer));\n        if(n>0){\n            std::cout<<\"client say \"<<n<<\" bytes: \"<<buffer<<std::endl;\n        }\n        else{\n            std::cout<<\"client is closed\"<<std::endl;\n            break;  \n        }\n        }\n    };\n    void Close(){\n        if(_fd>0){\n            close(_fd);\n        }\n    }\n    private:\n      std::string _path;\n      std::string _name;\n      std::string _fifoname;  \n      int _fd;\n};\n<\/code><\/pre>\n\n\n\n<p>\u4e0a\u9762\u4ee3\u7801\u4e3b\u8981\u662f\u5bf9\u7ba1\u9053\u6587\u4ef6\u7684\u6587\u4ef6\u64cd\u4f5c\uff0c\u5f53\u62ff\u5230\u6587\u4ef6\u63cf\u8ff0\u7b26\u540e\u5982\u4f55\u8fdb\u884c\u901a\u4fe1<\/p>\n\n\n\n<p>\u4e0e\u533f\u540d\u7ba1\u9053\u5bf9\u6bd4\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u7279\u6027<\/th><th>\u533f\u540d\u7ba1\u9053<\/th><th>\u547d\u540d\u7ba1\u9053<\/th><\/tr><\/thead><tbody><tr><td>\u5b58\u5728\u4f4d\u7f6e<\/td><td>\u5185\u5b58<\/td><td>\u6587\u4ef6\u7cfb\u7edf<\/td><\/tr><tr><td>\u8fdb\u7a0b\u5173\u7cfb<\/td><td>\u4eb2\u7f18<\/td><td>\u4efb\u610f<\/td><\/tr><tr><td>\u751f\u547d\u5468\u671f<\/td><td>\u968f\u8fdb\u7a0b<\/td><td>\u968f\u6587\u4ef6<\/td><\/tr><tr><td>\u540d\u79f0\/\u8def\u5f84<\/td><td>\u65e0<\/td><td>\u6709<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u4eca\u5929 \u7684\u66f4\u65b0\u5c31\u5230\u8fd9\u91cc\uff0c\u5982\u6709\u9519\u8bef\u6b22\u8fce\u8bc4\u8bba\u533a\u6307\u51fa<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4ee3\u7801\u4ed3\u5e93\uff1ahttps:\/\/gitee.com\/tgwTTT\/linux-learning-dai\/tree\/m&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[5],"tags":[],"class_list":["post-258","post","type-post","status-publish","format-standard","hentry","category-linux"],"_links":{"self":[{"href":"https:\/\/www.tgwttt.xyz\/index.php?rest_route=\/wp\/v2\/posts\/258","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.tgwttt.xyz\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tgwttt.xyz\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tgwttt.xyz\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tgwttt.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=258"}],"version-history":[{"count":4,"href":"https:\/\/www.tgwttt.xyz\/index.php?rest_route=\/wp\/v2\/posts\/258\/revisions"}],"predecessor-version":[{"id":850,"href":"https:\/\/www.tgwttt.xyz\/index.php?rest_route=\/wp\/v2\/posts\/258\/revisions\/850"}],"wp:attachment":[{"href":"https:\/\/www.tgwttt.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=258"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tgwttt.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=258"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tgwttt.xyz\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=258"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}