{"id":95755,"date":"2026-08-26T21:17:45","date_gmt":"2026-08-26T13:17:45","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/95755.html"},"modified":"2026-08-26T21:17:45","modified_gmt":"2026-08-26T13:17:45","slug":"linux%e5%85%a5%e9%97%a8day30%ef%bc%88%e5%a4%9a%e7%ba%bf%e7%a8%8b%e3%80%81%e8%bf%9b%e7%a8%8b%e9%97%b4%e9%80%9a%e4%bf%a1%e3%80%81%e7%bd%91%e7%bb%9c%e7%bc%96%e7%a8%8b%e4%b8%8e%e6%95%b0%e6%8d%ae%e5%ba%93","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/95755.html","title":{"rendered":"Linux\u5165\u95e8DAY30\uff08\u591a\u7ebf\u7a0b\u3001\u8fdb\u7a0b\u95f4\u901a\u4fe1\u3001\u7f51\u7edc\u7f16\u7a0b\u4e0e\u6570\u636e\u5e93\uff09"},"content":{"rendered":"

\u4e0a\u4e00\u7bc7\u6211\u4eec\u68b3\u7406\u4e86 Linux \u6587\u4ef6\u7f16\u7a0b，\u5305\u542b\u6807\u51c6 IO\u3001\u6587\u4ef6 IO\u3001\u76ee\u5f55\u64cd\u4f5c\u3001framebuffer \u5e27\u7f13\u51b2\u4e0e\u65e5\u5fd7\u6a21\u5757\u3002\u672c\u7bc7\u7ee7\u7eed\u5f80\u4e0b\u5b66\u4e60\u591a\u7ebf\u7a0b\u9ad8\u7ea7\u3001IPC \u8fdb\u7a0b\u95f4\u901a\u4fe1\u3001Socket \u7f51\u7edc\u7f16\u7a0b\u3001\u7b80\u5355\u6570\u636e\u5e93\u5f00\u53d1，\u628a Linux \u5e94\u7528\u5f00\u53d1\u56db\u5927\u6a21\u5757\u8865\u5168\u3002<\/p>\n

\u56de\u987e\u524d\u6587\u8981\u70b9\u901f\u89c8<\/h3>\n

\u6587\u4ef6\u7f16\u7a0b\u4e24\u5927\u4f53\u7cfb：<\/p>\n

  • \u6807\u51c6 IO：C \u5e93\u51fd\u6570，FILE*\u6587\u4ef6\u6d41，\u81ea\u5e26\u7f13\u51b2\u533a，\u53ef\u79fb\u690d\u6027\u5f3a；<\/li>\n
  • \u6587\u4ef6 IO（\u7cfb\u7edf\u8c03\u7528）：open\/read\/write\/close，\u6587\u4ef6\u63cf\u8ff0\u7b26 fd，\u65e0\u7528\u6237\u5c42\u7f13\u51b2，\u8d34\u8fd1\u5185\u6838；<\/li>\n
  • \u62d3\u5c55：\u76ee\u5f55 IOopendir\/readdir\u3001mmap \u5185\u5b58\u6620\u5c04\u64cd\u4f5c\/dev\/fb0\u5e27\u7f13\u5b58\u3001\u65e5\u5fd7\u6587\u4ef6\u5c01\u88c5\u3002<\/li>\n

    \u8fdb\u7a0b：\u8d44\u6e90\u5206\u914d\u6700\u5c0f\u5355\u4f4d；\u7ebf\u7a0b：CPU \u8c03\u5ea6\u6700\u5c0f\u5355\u4f4d\u3002 \u8fdb\u7a0b\u62e5\u6709\u5b8c\u6574\u72ec\u7acb\u865a\u62df\u5730\u5740\u7a7a\u95f4；\u540c\u4e00\u8fdb\u7a0b\u5185\u591a\u4e2a\u7ebf\u7a0b\u5171\u4eab\u5806\u3001\u5168\u5c40\u6570\u636e\u3001\u4ee3\u7801\u6bb5，\u6bcf\u4e2a\u7ebf\u7a0b\u79c1\u6709\u6808\u3002<\/p>\n

    \n

    \u4e00\u3001\u591a\u7ebf\u7a0b\u9ad8\u7ea7\u77e5\u8bc6\u70b9<\/h3>\n

    1. \u7ebf\u7a0b\u57fa\u7840\u51fd\u6570\u56de\u987e<\/h4>\n

    int pthread_create(pthread_t *thread, const pthread_attr_t *attr,
    \n void *(*start_routine) (void *), void *arg);<\/p>\n

    \u7f16\u8bd1\u5fc5\u987b\u52a0 -pthread \u53c2\u6570\u3002<\/p>\n

    \u7ebf\u7a0b\u9000\u51fa\u3001\u8d44\u6e90\u56de\u6536<\/h5>\n
  • pthread_exit(void *retval)：\u7ebf\u7a0b\u4e3b\u52a8\u9000\u51fa，\u53ef\u4ee5\u643a\u5e26\u8fd4\u56de\u503c；<\/li>\n
  • pthread_join(pthread_t thread, void **retval)：\u963b\u585e\u7b49\u5f85\u56de\u6536\u7ebf\u7a0b，\u7c7b\u4f3c\u8fdb\u7a0b wait；\u5982\u679c\u4e0d join，\u4f1a\u4ea7\u751f\u7ebf\u7a0b\u50f5\u5c38，\u5185\u5b58\u6cc4\u6f0f；<\/li>\n
  • pthread_detach(pthread_t thread)：\u7ebf\u7a0b\u5206\u79bb\u3002\u5206\u79bb\u4e4b\u540e\u7ebf\u7a0b\u7ed3\u675f\u81ea\u52a8\u91ca\u653e\u8d44\u6e90，\u4e0d\u9700\u8981 join \u56de\u6536\u3002\u9002\u5408\u540e\u53f0\u5de5\u4f5c\u7ebf\u7a0b\u3002<\/li>\n

    \u26a0\ufe0f\u6ce8\u610f：\u4e3b\u7ebf\u7a0b\u5982\u679creturn \/ exit()，\u6574\u4e2a\u8fdb\u7a0b\u6240\u6709\u7ebf\u7a0b\u5168\u90e8\u9500\u6bc1；\u4e3b\u7ebf\u7a0b\u8c03\u7528pthread_exit()，\u4e3b\u7ebf\u7a0b\u9000\u51fa，\u5176\u4ed6\u5b50\u7ebf\u7a0b\u53ef\u4ee5\u7ee7\u7eed\u8fd0\u884c\u3002<\/p>\n

    2. \u7ebf\u7a0b\u540c\u6b65：\u4e92\u65a5\u9501 pthread_mutex_t<\/h4>\n

    \u591a\u7ebf\u7a0b\u5171\u4eab\u5168\u5c40\u53d8\u91cf，\u4f1a\u4ea7\u751f\u7ade\u6001\u6761\u4ef6（\u6570\u636e\u6df7\u4e71）\u3002\u4e92\u65a5\u9501\u7528\u6765\u4fdd\u62a4\u5171\u4eab\u8d44\u6e90，\u4fdd\u8bc1\u540c\u4e00\u65f6\u95f4\u53ea\u6709\u4e00\u4e2a\u7ebf\u7a0b\u8bbf\u95ee\u4e34\u754c\u8d44\u6e90\u3002<\/p>\n

    \u6838\u5fc3 API：<\/p>\n

    pthread_mutex_init(); \/\/\u521d\u59cb\u5316\u9501
    \npthread_mutex_lock(); \/\/\u52a0\u9501，\u62ff\u4e0d\u5230\u5c31\u963b\u585e
    \npthread_mutex_unlock(); \/\/\u89e3\u9501
    \npthread_mutex_destroy();\/\/\u9500\u6bc1\u9501<\/p>\n

    \u4f7f\u7528\u8303\u5f0f：<\/p>\n

    pthread_mutex_t mutex;
    \n\/\/\u4e34\u754c\u533a\u5f00\u59cb
    \npthread_mutex_lock(&mutex);
    \n\/\/\u64cd\u4f5c\u5171\u4eab\u5168\u5c40\u53d8\u91cf
    \npthread_mutex_unlock(&mutex);
    \n\/\/\u4e34\u754c\u533a\u7ed3\u675f<\/p>\n

    3. \u6761\u4ef6\u53d8\u91cf pthread_cond_t<\/h4>\n

    \u4e92\u65a5\u9501\u89e3\u51b3 \u201c\u4e92\u65a5\u8bbf\u95ee\u201d；\u6761\u4ef6\u53d8\u91cf\u89e3\u51b3\u7ebf\u7a0b\u7b49\u5f85 \/ \u5524\u9192，\u751f\u4ea7\u8005\u6d88\u8d39\u8005\u6a21\u578b\u5fc5\u5907\u3002 \u5e38\u7528\u63a5\u53e3：<\/p>\n

    pthread_cond_init();
    \npthread_cond_wait(); \/\/\u91ca\u653e\u9501\u5e76\u963b\u585e\u7b49\u5f85\u6761\u4ef6，\u88ab\u5524\u9192\u540e\u91cd\u65b0\u83b7\u53d6\u9501
    \npthread_cond_signal(); \/\/\u5524\u9192\u4e00\u4e2a\u7b49\u5f85\u7ebf\u7a0b
    \npthread_cond_broadcast();\/\/\u5524\u9192\u5168\u90e8\u7b49\u5f85\u7ebf\u7a0b
    \npthread_cond_destroy();<\/p>\n

    \u7ecf\u5178\u6a21\u578b：\u751f\u4ea7\u8005\u5f80\u961f\u5217\u653e\u6570\u636e，\u6761\u4ef6\u53d8\u91cf\u53d1\u4fe1\u53f7；\u6d88\u8d39\u8005cond_wait\u963b\u585e，\u6536\u5230\u4fe1\u53f7\u8bfb\u53d6\u961f\u5217\u3002<\/p>\n

    4. \u7ebf\u7a0b\u5c5e\u6027<\/h4>\n
      \n
    • \u5206\u79bb\u5c5e\u6027：\u521b\u5efa\u7ebf\u7a0b\u7684\u65f6\u5019\u8bbe\u7f6e\u5206\u79bb\u5c5e\u6027，\u7b49\u4ef7\u4e8epthread_detach；<\/li>\n
    • \u6808\u5927\u5c0f：\u53ef\u4ee5\u81ea\u5b9a\u4e49\u7ebf\u7a0b\u6808\u7a7a\u95f4，\u5d4c\u5165\u5f0f\u5f00\u53d1\u5e38\u7528\u3002<\/li>\n<\/ul>\n

      \u8fdb\u7a0b VS \u7ebf\u7a0b\u5b8c\u6574\u5bf9\u6bd4<\/h4>\n

      \u8868\u683c<\/p>\n\n\u5bf9\u6bd4\u9879\u8fdb\u7a0b\u7ebf\u7a0b<\/tr>\n\n\n\n\n\n\n
      \u8c03\u5ea6\u5355\u4f4d<\/td>\n\u8d44\u6e90\u5206\u914d\u6700\u5c0f\u5355\u4f4d<\/td>\nCPU \u8c03\u5ea6\u6700\u5c0f\u5355\u4f4d<\/td>\n<\/tr>\n
      \u5185\u5b58\u7a7a\u95f4<\/td>\n\u5b8c\u5168\u72ec\u7acb\u865a\u62df\u5730\u5740\u7a7a\u95f4<\/td>\n\u5171\u4eab\u8fdb\u7a0b\u8d44\u6e90，\u4ec5\u6808\u79c1\u6709<\/td>\n<\/tr>\n
      \u521b\u5efa\u5f00\u9500<\/td>\n\u5927，\u62f7\u8d1d\u9875\u8868\u3001\u5185\u5b58<\/td>\n\u5f88\u5c0f，\u4ec5\u5206\u914d\u7ebf\u7a0b\u6808<\/td>\n<\/tr>\n
      \u5d29\u6e83\u5f71\u54cd<\/td>\n\u4e00\u4e2a\u8fdb\u7a0b\u5d29\u6e83\u4e92\u4e0d\u5e72\u6270<\/td>\n\u4e00\u4e2a\u7ebf\u7a0b\u5d29\u6e83，\u6574\u4e2a\u8fdb\u7a0b\u5168\u90e8\u9000\u51fa<\/td>\n<\/tr>\n
      \u901a\u4fe1\u65b9\u5f0f<\/td>\nIPC \u7ba1\u9053\u3001\u6d88\u606f\u961f\u5217\u3001\u5171\u4eab\u5185\u5b58\u3001socket<\/td>\n\u76f4\u63a5\u8bfb\u5199\u5168\u5c40\u53d8\u91cf，\u914d\u5408\u9501\u4e0e\u6761\u4ef6\u53d8\u91cf<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      \u5751\u70b9\u603b\u7ed3：<\/p>\n

    • fork \u4e4b\u540e\u5b50\u8fdb\u7a0b\u53ea\u4f1a\u590d\u5236\u8c03\u7528 fork \u7684\u90a3\u4e00\u4e2a\u7ebf\u7a0b，\u5176\u4ed6\u7ebf\u7a0b\u5168\u90e8\u6d88\u5931；\u591a\u7ebf\u7a0b\u7a0b\u5e8f\u5c3d\u91cf\u907f\u514d fork\u3002<\/li>\n
    • \u9501\u5fd8\u8bb0\u91ca\u653e \u2192 \u6b7b\u9501；\u52a0\u9501\u987a\u5e8f\u4e0d\u4e00\u81f4\u4e5f\u4f1a\u6b7b\u9501\u3002<\/li>\n
      \n

      \u4e8c\u3001\u8fdb\u7a0b\u95f4\u901a\u4fe1 IPC<\/h3>\n

      \u8fdb\u7a0b\u865a\u62df\u5730\u5740\u76f8\u4e92\u9694\u79bb，\u4e0d\u80fd\u76f4\u63a5\u8bbf\u95ee\u5bf9\u65b9\u5185\u5b58，\u5fc5\u987b\u501f\u52a9\u5185\u6838\u63d0\u4f9b IPC \u673a\u5236\u3002<\/p>\n

      \u5e38\u89c1 IPC \u65b9\u5f0f：<\/p>\n

    • \u7ba1\u9053 pipe：\u8840\u7f18\u8fdb\u7a0b\u901a\u4fe1（\u7236\u5b50\u8fdb\u7a0b），\u534a\u53cc\u5de5，\u5b57\u8282\u6d41；<\/li>\n
    • \u6709\u540d\u7ba1\u9053 FIFO：\u65e0\u8840\u7f18\u5173\u7cfb\u8fdb\u7a0b\u4e5f\u53ef\u4ee5\u901a\u4fe1；<\/li>\n
    • \u6d88\u606f\u961f\u5217：\u5185\u6838\u7ef4\u62a4\u6d88\u606f\u7f13\u51b2\u533a，\u5e26\u7c7b\u578b\u6570\u636e\u5757；<\/li>\n
    • \u5171\u4eab\u5185\u5b58 shm：\u591a\u4e2a\u8fdb\u7a0b\u6620\u5c04\u540c\u4e00\u5757\u7269\u7406\u5185\u5b58，\u901f\u5ea6\u6700\u5feb IPC，\u4f46\u662f\u6ca1\u6709\u540c\u6b65\u673a\u5236，\u5fc5\u987b\u914d\u5408\u4fe1\u53f7\u91cf \/ \u9501；<\/li>\n
    • \u4fe1\u53f7\u91cf sem：\u505a\u540c\u6b65\u4e92\u65a5，\u4e0d\u4f20\u9012\u4e1a\u52a1\u6570\u636e；<\/li>\n
    • \u4fe1\u53f7 signal：\u5f02\u6b65\u901a\u77e5，\u4f20\u9012\u7b80\u5355\u4e8b\u4ef6；<\/li>\n
    • Socket：\u53ef\u4ee5\u672c\u673a\u8fdb\u7a0b\u901a\u4fe1，\u4e5f\u652f\u6301\u8de8\u4e3b\u673a\u7f51\u7edc\u901a\u4fe1\u3002<\/li>\n

      1. \u533f\u540d\u7ba1\u9053 pipe<\/h4>\n

      int pipe(int fd[2]);
      \n\/\/ fd[0]\u8bfb\u7aef，fd[1]\u5199\u7aef<\/p>\n

      \u7ba1\u9053\u7279\u70b9：<\/p>\n

        \n
      • \u6570\u636e\u5355\u5411\u6d41\u52a8；\u8bfb\u7aef\u5173\u95ed，\u5199\u89e6\u53d1 SIGPIPE \u4fe1\u53f7；\u5199\u7aef\u5173\u95ed，read \u8fd4\u56de 0；<\/li>\n
      • \u53ea\u9002\u7528\u4e8e\u6709\u4eb2\u7f18\u5173\u7cfb\u8fdb\u7a0b\u3002<\/li>\n<\/ul>\n

        2. \u4fe1\u53f7 signal<\/h4>\n

        \u4fe1\u53f7\u662f\u8f6f\u4ef6\u4e2d\u65ad\u3002kill -l\u67e5\u770b\u5168\u90e8\u4fe1\u53f7\u3002 signal() \/ sigaction()\u6ce8\u518c\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u3002<\/p>\n

        \u6ce8\u610f：\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u5185\u90e8\u53ea\u5141\u8bb8\u8c03\u7528\u53ef\u91cd\u5165\u51fd\u6570，\u4e0d\u8981\u4f7f\u7528 printf\/malloc \u7b49\u4e0d\u5b89\u5168\u51fd\u6570\u3002<\/p>\n

        3. \u5171\u4eab\u5185\u5b58（\u6700\u9ad8\u901f IPC）<\/h4>\n

        shmget() \/\/\u521b\u5efa\/\u83b7\u53d6\u5171\u4eab\u5185\u5b58id
        \nshmat() \/\/\u6620\u5c04\u5230\u672c\u8fdb\u7a0b\u865a\u62df\u5730\u5740
        \nshmdt() \/\/\u89e3\u9664\u6620\u5c04
        \nshmctl() \/\/\u63a7\u5236\u3001\u5220\u9664\u5171\u4eab\u5185\u5b58<\/p>\n

        \u5171\u4eab\u5185\u5b58\u6ca1\u6709\u81ea\u5e26\u540c\u6b65，\u4e00\u5b9a\u8981\u642d\u914d\u4fe1\u53f7\u91cf\u6216\u8005\u4e92\u65a5\u9501，\u5426\u5219\u591a\u8fdb\u7a0b\u540c\u65f6\u5199\u4f1a\u4e71\u6570\u636e\u3002<\/p>\n

        \n

        \u4e09\u3001Linux \u7f51\u7edc\u7f16\u7a0b Socket<\/h3>\n

        \u4e00\u5207\u7686\u6587\u4ef6，socket \u4e5f\u662f\u4e00\u79cd\u6587\u4ef6\u63cf\u8ff0\u7b26，\u53ef\u4ee5\u7528 read\/write \u8bfb\u5199\u3002<\/p>\n

        TCP（\u9762\u5411\u8fde\u63a5，\u53ef\u9760\u6d41\u5f0f）\u670d\u52a1\u5668\u5f00\u53d1\u6d41\u7a0b<\/h4>\n
      • socket() \u521b\u5efa\u5957\u63a5\u5b57，\u8fd4\u56de fd；<\/li>\n
      • bind() \u7ed1\u5b9a IP \u548c\u7aef\u53e3\u53f7；<\/li>\n
      • listen() \u8bbe\u7f6e\u76d1\u542c，\u5f00\u542f\u88ab\u52a8\u8fde\u63a5；<\/li>\n
      • accept() \u963b\u585e\u7b49\u5f85\u5ba2\u6237\u7aef\u8fde\u63a5，\u8fd4\u56de\u65b0\u901a\u4fe1 socket fd；<\/li>\n
      • read\/write \u548c\u5ba2\u6237\u7aef\u6536\u53d1\u6570\u636e；<\/li>\n
      • close \u5173\u95ed\u5957\u63a5\u5b57\u3002<\/li>\n

        TCP \u5ba2\u6237\u7aef\u6d41\u7a0b：<\/p>\n

      • socket();<\/li>\n
      • connect () \u5411\u670d\u52a1\u5668\u53d1\u8d77\u8fde\u63a5；<\/li>\n
      • read\/write \u6536\u53d1；<\/li>\n
      • close\u3002<\/li>\n

        UDP（\u65e0\u8fde\u63a5，\u6570\u636e\u62a5）<\/h4>\n

        \u4e0d\u9700\u8981 connect\u3001listen\u3001accept； \u4f7f\u7528sendto()\u53d1\u9001，recvfrom()\u63a5\u6536，\u81ea\u5e26\u5bf9\u7aef\u5730\u5740\u3002<\/p>\n

        \u5b57\u8282\u5e8f\u5927\u5751<\/h4>\n

        \u7f51\u7edc\u7edf\u4e00\u4f7f\u7528\u5927\u7aef\u5b57\u8282\u5e8f；\u4e3b\u673a\u53ef\u80fd\u5c0f\u7aef\u3002 \u8f6c\u6362\u51fd\u6570： htons() htonl() ntohs() ntohl() h\u2011host \u4e3b\u673a，n\u2011network \u7f51\u7edc，s\u2011short，l\u2011long\u3002<\/p>\n

        \u5e38\u7528\u7ed3\u6784\u4f53：struct sockaddr_in IPv4 \u5730\u5740\u7ed3\u6784\u3002<\/p>\n

        IO \u6a21\u578b（\u91cd\u70b9\u9762\u8bd5）<\/h4>\n
      • \u963b\u585e IO（\u9ed8\u8ba4）：accept\u3001read \u6ca1\u6709\u6570\u636e\u5c31\u5361\u4f4f；<\/li>\n
      • \u975e\u963b\u585e IO：socket \u8bbe\u7f6e O_NONBLOCK，\u6ca1\u6709\u6570\u636e\u7acb\u523b\u8fd4\u56de\u20111；<\/li>\n
      • IO \u591a\u8def\u590d\u7528：select \/poll\/epoll\u3002<\/li>\n

        epoll \u662f Linux \u9ad8\u6027\u80fd\u7f51\u7edc\u6838\u5fc3，\u9ad8\u5e76\u53d1\u670d\u52a1\u5668\u57fa\u77f3\u3002<\/p>\n

        \u7b80\u5355\u533a\u5206：<\/p>\n

          \n
        • select：\u6587\u4ef6\u63cf\u8ff0\u6709\u4e0a\u9650；<\/li>\n
        • poll：\u65e0\u4e0a\u9650，\u4f46\u6bcf\u6b21\u5168\u90e8\u904d\u5386；<\/li>\n
        • epoll：\u4e8b\u4ef6\u9a71\u52a8，\u53ea\u8fd4\u56de\u5c31\u7eea fd，\u767e\u4e07\u5e76\u53d1\u9996\u9009\u3002<\/li>\n<\/ul>\n

          \u670d\u52a1\u5668\u67b6\u6784：\u5355\u8fdb\u7a0b epoll；\u591a\u8fdb\u7a0b fork；\u591a\u7ebf\u7a0b\u3002<\/p>\n

          \n

          \u56db\u3001Linux \u4e0b\u6570\u636e\u5e93\u7f16\u7a0b SQLite<\/h3>\n

          \u5d4c\u5165\u5f0f\u5e38\u7528\u8f7b\u91cf\u6570\u636e\u5e93 SQLite，\u6587\u4ef6\u578b\u6570\u636e\u5e93，\u4e0d\u9700\u8981\u72ec\u7acb\u670d\u52a1\u8fdb\u7a0b\u3002<\/p>\n

          \u6838\u5fc3 API：<\/p>\n

        • sqlite3_open() \u6253\u5f00\u6570\u636e\u5e93\u6587\u4ef6；<\/li>\n
        • sqlite3_exec() \u76f4\u63a5\u6267\u884c SQL \u8bed\u53e5（\u5efa\u8868\u3001\u589e\u5220\u6539）；<\/li>\n
        • sqlite3_prepare_v2() \u9884\u5904\u7406\u8bed\u53e5，\u67e5\u8be2\u6570\u636e；<\/li>\n
        • \u56de\u8c03\u51fd\u6570\u6216\u8005 step \u51fd\u6570\u83b7\u53d6\u67e5\u8be2\u7ed3\u679c；<\/li>\n
        • sqlite3_close()\u5173\u95ed\u6570\u636e\u5e93\u3002<\/li>\n

          \u57fa\u7840 SQL \u8bed\u53e5：<\/p>\n

          CREATE TABLE user(id INTEGER PRIMARY KEY, name TEXT);
          \nINSERT INTO user(name) VALUES("zhangsan");
          \nSELECT * FROM user;
          \nUPDATE user set name="lisi" where id=1;
          \nDELETE FROM user where id=1;<\/p>\n

          \u7f16\u8bd1\u94fe\u63a5\u9700\u8981 -lsqlite3\u3002<\/p>\n

          \u4f7f\u7528\u573a\u666f：\u672c\u5730\u914d\u7f6e\u5b58\u50a8\u3001\u65e5\u5fd7\u8bb0\u5f55\u3001\u5d4c\u5165\u5f0f\u8bbe\u5907\u672c\u5730\u6570\u636e\u7ba1\u7406\u3002<\/p>\n

          \n

          \u4e94\u3001\u6574\u5957 Linux \u5e94\u7528\u5f00\u53d1\u77e5\u8bc6\u603b\u6846\u67b6<\/h3>\n
        • \u6587\u4ef6\u7f16\u7a0b：\u6807\u51c6 IO\u3001\u7cfb\u7edf\u8c03\u7528 IO\u3001\u76ee\u5f55\u3001mmap \u5e27\u7f13\u51b2\u3001\u65e5\u5fd7；<\/li>\n
        • \u591a\u4efb\u52a1：\u8fdb\u7a0b fork\u3001\u50f5\u5c38 \/ \u5b64\u513f\u8fdb\u7a0b\u3001exec；\u7ebf\u7a0b pthread\u3001\u9501\u3001\u6761\u4ef6\u53d8\u91cf；<\/li>\n
        • IPC \u8fdb\u7a0b\u95f4\u901a\u4fe1：\u7ba1\u9053\u3001\u6d88\u606f\u961f\u5217\u3001\u5171\u4eab\u5185\u5b58\u3001\u4fe1\u53f7；<\/li>\n
        • Socket \u7f51\u7edc\u7f16\u7a0b：TCP\/UDP，\u5b57\u8282\u5e8f，IO \u591a\u8def\u590d\u7528 epoll；<\/li>\n
        • SQLite \u6570\u636e\u5e93，\u6301\u4e45\u5316\u7ed3\u6784\u5316\u6570\u636e\u3002<\/li>\n

          \u5b66\u4e60\u5b9e\u64cd\u5efa\u8bae<\/h4>\n
        • \u6587\u4ef6：\u81ea\u5df1\u5b9e\u73b0 cp \u5de5\u5177\u3001\u65e5\u5fd7\u6a21\u5757\u3001framebuffer \u753b\u70b9；<\/li>\n
        • \u8fdb\u7a0b：fork \u521b\u5efa\u5b50\u8fdb\u7a0b，wait \u56de\u6536，\u7ec3\u4e60 execl \u8c03\u7528 ls \u547d\u4ee4；<\/li>\n
        • \u7ebf\u7a0b：\u5199\u751f\u4ea7\u8005\u6d88\u8d39\u8005\u6a21\u578b，\u7ec3\u4e60\u4e92\u65a5\u9501 + \u6761\u4ef6\u53d8\u91cf；<\/li>\n
        • \u7f51\u7edc：\u5199\u7b80\u5355 TCP \u56de\u663e\u670d\u52a1\u5668，\u518d\u6539\u9020 epoll \u591a\u8def\u590d\u7528；<\/li>\n
        • SQLite：\u5199\u4e00\u4e2a\u7b80\u5355\u7528\u6237\u4fe1\u606f\u589e\u5220\u6539\u67e5\u7a0b\u5e8f\u3002<\/li>\n

          \u5c0f\u7ed3<\/h3>\n

          \u8fdb\u7a0b\u548c\u7ebf\u7a0b\u662f\u591a\u4efb\u52a1\u7684\u4e24\u79cd\u5b9e\u73b0，\u7ebf\u7a0b\u66f4\u8f7b\u91cf\u9002\u5408 CPU \u5bc6\u96c6\u3001IO \u5bc6\u96c6\u5e76\u53d1；\u8fdb\u7a0b\u9694\u79bb\u6027\u5f3a，\u7a33\u5b9a\u6027\u66f4\u9ad8\u3002\u8fdb\u7a0b\u95f4\u901a\u4fe1\u624b\u6bb5\u5f88\u591a，\u8ffd\u6c42\u901f\u5ea6\u4f18\u5148\u9009\u5171\u4eab\u5185\u5b58，\u8de8\u673a\u5668\u901a\u4fe1\u5c31\u7528 Socket \u7f51\u7edc\u7f16\u7a0b；\u7ed3\u6784\u5316\u6301\u4e45\u5b58\u50a8\u9009\u62e9 SQLite \u6570\u636e\u5e93\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

          \u4e0a\u4e00\u7bc7\u6211\u4eec\u68b3\u7406\u4e86 Linux \u6587\u4ef6\u7f16\u7a0b，\u5305\u542b\u6807\u51c6 IO\u3001\u6587\u4ef6 IO\u3001\u76ee\u5f55\u64cd\u4f5c\u3001framebuffer \u5e27\u7f13\u51b2\u4e0e\u65e5\u5fd7\u6a21\u5757\u3002\u672c\u7bc7\u7ee7\u7eed\u5f80\u4e0b\u5b66\u4e60\u591a\u7ebf\u7a0b\u9ad8\u7ea7\u3001IPC \u8fdb\u7a0b\u95f4\u901a\u4fe1\u3001Socket \u7f51\u7edc\u7f16\u7a0b\u3001\u7b80\u5355\u6570\u636e\u5e93\u5f00\u53d1，\u628a Linux \u5e94\u7528\u5f00\u53d1\u56db\u5927\u6a21\u5757\u8865\u5168\u3002\u56de\u987e\u524d\u6587\u8981\u70b9\u901f\u89c8\u6587\u4ef6\u7f16\u7a0b\u4e24\u5927\u4f53\u7cfb：\u6807\u51c6 IO：C \u5e93\u51fd\u6570，FILE*\u6587\u4ef6\u6d41，\u81ea\u5e26\u7f13\u51b2\u533a，\u53ef\u79fb\u690d\u6027\u5f3a；\u6587\u4ef6 IO&#xff0<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[58,100,78],"topic":[],"class_list":["post-95755","post","type-post","status-publish","format-standard","hentry","category-server","tag-linux","tag-100","tag-78"],"yoast_head":"\nLinux\u5165\u95e8DAY30\uff08\u591a\u7ebf\u7a0b\u3001\u8fdb\u7a0b\u95f4\u901a\u4fe1\u3001\u7f51\u7edc\u7f16\u7a0b\u4e0e\u6570\u636e\u5e93\uff09 - 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