{"id":52036,"date":"2024-12-03T11:21:53","date_gmt":"2024-12-03T03:21:53","guid":{"rendered":"https:\/\/fwq.ai\/blog\/52036\/"},"modified":"2024-12-03T11:21:53","modified_gmt":"2024-12-03T03:21:53","slug":"linux%e4%b8%8b%e6%9c%89%e5%93%aa%e4%ba%9b%e5%ad%97%e7%ac%a6%e8%ae%be%e5%a4%87","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/52036\/","title":{"rendered":"linux\u4e0b\u6709\u54ea\u4e9b\u5b57\u7b26\u8bbe\u5907"},"content":{"rendered":"

<\/b> <\/p>\n

linux\u4e0b\u6709\u54ea\u4e9b\u5b57\u7b26\u8bbe\u5907<\/h1>\n

\u5c0f\u4f19\u4f34\u4eec\u5bf9\u6587\u7ae0\u7f16\u7a0b\u611f\u5174\u8da3\u5417\uff1f\u662f\u5426\u6b63\u5728\u5b66\u4e60\u76f8\u5173\u77e5\u8bc6\u70b9\uff1f\u5982\u679c\u662f\uff0c\u90a3\u4e48\u672c\u6587\u300alinux\u4e0b\u6709\u54ea\u4e9b\u5b57\u7b26\u8bbe\u5907\u300b\uff0c\u5c31\u5f88\u9002\u5408\u4f60\uff0c\u672c\u7bc7\u6587\u7ae0\u8bb2\u89e3\u7684\u77e5\u8bc6\u70b9\u4e3b\u8981\u5305\u62ec\u3002\u5728\u4e4b\u540e\u7684\u6587\u7ae0\u4e2d\u4e5f\u4f1a\u591a\u591a\u5206\u4eab\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff01<\/p>\n<\/p>\n

\n

linux\u5b57\u7b26\u8bbe\u5907\u6709\uff1a1\u3001\u9f20\u6807\uff0c\u662f\u8ba1\u7b97\u673a\u7684\u4e00\u79cd\u5916\u63a5\u8f93\u5165\u8bbe\u5907\uff0c\u4e5f\u662f\u8ba1\u7b97\u673a\u663e\u793a\u7cfb\u7edf\u7eb5\u6a2a\u5750\u6807\u5b9a\u4f4d\u7684\u6307\u793a\u5668\uff1b2\u3001\u952e\u76d8\uff0c\u662f\u7528\u4e8e\u64cd\u4f5c\u8ba1\u7b97\u673a\u8bbe\u5907\u8fd0\u884c\u7684\u4e00\u79cd\u6307\u4ee4\u548c\u6570\u636e\u8f93\u5165\u88c5\u7f6e\uff1b3\u3001\u4e32\u884c\u7aef\u53e3\u7ec8\u7aef\uff0c\u4f7f\u7528\u8ba1\u7b97\u673a\u4e32\u884c\u7aef\u53e3\u8fde\u63a5\u7684\u7ec8\u7aef\u8bbe\u5907\uff1b4\u3001\u63a7\u5236\u7ec8\u7aef\uff1b5\u3001\u63a7\u5236\u53f0\u7b49\u3002<\/p>\n<\/blockquote>\n

linux\u5b57\u7b26\u8bbe\u5907<\/strong><\/h3>\n

\u5b57\u7b26\u8bbe\u5907\u662fLinux\u4e09\u5927\u8bbe\u5907\u4e4b\u4e00\uff08\u53e6\u5916\u4e24\u79cd\u662f\u5757\u8bbe\u5907\uff0c\u7f51\u7edc\u8bbe\u5907\uff09\u3002\u5b83\u4eec\u5747\u4ee5\u4e00\u4e2a\u6587\u4ef6\u8282\u70b9\u5f62\u5f0f\u663e\u793a\u5728\u6587\u4ef6\u7cfb\u7edf\u7684\/dev\u76ee\u5f55\u4e0b(crw–w—- 1 root tty 4\uff0c 0 7\u6708 11 09:11 tty0 \u5176\u4e2dc\u4ee3\u8868\u5b57\u7b26\u8bbe\u5907\u7c7b\u578b)\u3002<\/p>\n

\u5b57\u7b26\u8bbe\u5907\u662f\u6307\u8bbe\u5907\u65e0\u9700\u7f13\u51b2\u5373\u53ef\u76f4\u63a5\u8fdb\u884c\u8bfb\u5199\u7684\u8bbe\u5907\uff0c \u5982\u9f20\u6807\uff0c\u952e\u76d8\uff0c\u4e32\u53e3\u8bbe\u5907\u3001\u8c03\u5236\u89e3\u8c03\u5668\u7b49\uff0c \u5b83\u4e0e\u5757\u8bbe\u5907\u7684\u533a\u522b\u5728\u4e8e\u662f\u5b57\u7b26\u64cd\u4f5c\u7684\u57fa\u672c\u5355\u4f4d\u662f\u5b57\u8282\u3002<\/p>\n

\u5b57\u7b26\u8bbe\u5907\u7684\u5206\u7c7b<\/strong><\/p>\n

\u5b57\u7b26\u8bbe\u5907\u4e3b\u8981\u5305\u62ec\u63a7\u5236\u7ec8\u7aef\u8bbe\u5907\u548c\u4e32\u884c\u7ec8\u7aef\u8bbe\u5907\uff0c \u4f8b\u5982\u63a7\u5236\u53f0\u548c\u952e\u76d8\u3002\u4f9d\u636e\u529f\u80fd\u548c\u786c\u4ef6\u4e0a\u7684\u5dee\u522b\uff0c \u5b57\u7b26\u7ec8\u7aef\u8bbe\u5907\u6709\u5982\u4e0b\u5206\u7c7b:<\/p>\n

    \n
  • \n

    \u4e32\u884c\u7aef\u53e3\u7ec8\u7aef(\/dev\/ttSn)\uff1a\u4f7f\u7528\u8ba1\u7b97\u673a\u4e32\u884c\u7aef\u53e3\u8fde\u63a5\u7684\u7ec8\u7aef\u8bbe\u5907\uff0c \u4e32\u884c\u8bbe\u5907\u6570\u636e\u4f20\u8f93\u65b9\u5f0f\u4e3a\u540c\u4e00\u5b57\u7b268\u4e2abit\u5355\u7ebf\u4f20\u8f93\uff0c \u5728\u547d\u4ee4\u884c\u8f93\u5165 echo ‘hello world’ > \/dev\/ttyS0\u53ef\u5c06\u8f93\u5165\u5199\u5165\u5230\u5bf9\u5e94\u8bbe\u5907\u3002<\/p>\n<\/li>\n

  • \n

    \u4f2a\u7ec8\u7aef(\/dev\/ttyp\uff0c\/dev\/ptyp): \u5bf9\u5e94\u5e95\u5c42\u4e0d\u5b58\u5728\u771f\u5b9e\u7684\u786c\u4ef6\u8bbe\u5907\uff0c \u7528\u4e8e\u4e3a\u5176\u4ed6\u7a0b\u5e8f\u63d0\u4f9b\u7ec8\u7aef\u5f0f\u6837\u7684\u63a5\u53e3\uff0c\u5982\u7f51\u7edc\u767b\u9646\u4e3b\u673a\u65f6\u7f51\u7edc\u670d\u52a1\u5668\u548cshell\u7a0b\u5e8f\u4e4b\u95f4\u7684\u7ec8\u7aef\u63a5\u53e3\u3002<\/p>\n<\/li>\n

  • \n

    \u63a7\u5236\u7ec8\u7aef(\/dev\/tty)\uff1a\u4e3b\u8bbe\u5907\u53f7\u4e3a5\uff0c \u8fdb\u7a0b\u63a7\u5236\u7ec8\u7aef\uff0c\u4e0e\u8fdb\u7a0b\u76f8\u5173\u8054\uff0c\u5982\u767b\u9646shell\u8fdb\u7a0b\u4f7f\u7528\u7684\u5c31\u662f\u7ec8\u7aef\/dev\/tty\u3002<\/p>\n<\/li>\n

  • \n

    \u63a7\u5236\u53f0(\/dev\/ttyn\uff0c\/dev\/consol): \u8ba1\u7b97\u673a\u8f93\u5165\u8f93\u51fa\u7684\u663e\u793a\u5668\uff0c\u5f53\u63a7\u5236\u53f0\u767b\u9646\u65f6\uff0c \u4f7f\u7528\u7684\u5c31\u662ftty1\uff0c \u800cubuntu \u56fe\u5f62\u754c\u9762\u4f7f\u7528\u7684tty7\u3002<\/p>\n<\/li>\n

  • \n

    \u5176\u4ed6\u7c7b\u578b\uff1a\u73b0\u884c\u7684linux\u9488\u5bf9\u8bb8\u591a\u4e0d\u540c\u7684\u8bbe\u5907\u5efa\u6709\u8bb8\u591a\u5176\u4ed6\u79cd\u7c7b\u7684\u8bbe\u5907\u7279\u6b8a\u6587\u4ef6\uff0c\u5982ISIDIN\u8bbe\u5907\u7684\/dev\/ttyIn\u8bbe\u5907\u3002<\/p>\n<\/li>\n<\/ul>\n

    \u5b57\u7b26\u8bbe\u5907\u7684\u6027\u8d28\u53ca\u7279\u70b9<\/strong><\/p>\n

      \n
    • \n

      \u5b57\u7b26\u8bbe\u5907\u5c5e\u4e8e\u8bbe\u5907\u6587\u4ef6\u7cfb\u7edf\u7684\u4e00\u79cd\uff0c \u76f8\u5f53\u4e8e\u5e95\u5c42\u786c\u4ef6\u5411\u4e0a\u5c42\u63d0\u4f9b\u7684\u903b\u8f91\u8bbe\u5907\u6587\u4ef6\uff0c \u5b9b\u5982\u5c06\u4e00\u4e2a\u6570\u636e\u7aef\u53e3(\u6570\u636e\u5bc4\u5b58\u5668)\u4e0e\u4e00\u4e2a\u6587\u4ef6\u5bf9\u63a5\u8d77\u6765\uff0c\u8bbe\u5907\u9a71\u52a8\u7a0b\u5e8f\u76f4\u63a5\u5bf9\u6587\u4ef6\u64cd\u4f5c\uff0c \u4e8e\u662f\u4fbf\u76f4\u63a5\u5bf9\u7aef\u53e3\u8fdb\u884c\u4e86\u8bfb\u5199\u64cd\u4f5c\u3002 \u540c\u6837\u4f5c\u4e3a\u6587\u4ef6\uff0c \u5b57\u7b26\u8bbe\u5907\u9a71\u52a8\u4e5f\u5fc5\u987b\u5b9e\u73b0\u6587\u4ef6\u7684\u57fa\u672c\u7684\u64cd\u4f5copen()\uff0cclose()\uff0cwrite()\uff0cread()\u7b49\uff0c\u5f53\u7136\u7ec8\u7aef\u91cd\u5b9a\u5411\u64cd\u4f5c\u4e5f\u662f\u652f\u6301\u7684\u3002<\/p>\n<\/li>\n

    • \n

      \u5b57\u7b26\u8bbe\u5907\u6587\u4ef6\u6587\u4ef6\u7684\u8bfb\u5199\u662f\u4ee5\u5355\u4e2a\u5b57\u8282\u4e3a\u5355\u4f4d\u7684\uff0c \u4e0d\u9700\u8981\u8bbe\u7acb\u786c\u4ef6\u7f13\u51b2\u533a\u3002 \u8bbe\u5907\u50cf\u8bbf\u95ee\u5b57\u8282\u6d41\u4e00\u6837\u88ab\u64cd\u4f5c\u7cfb\u7edf\u8bbf\u95ee\u3002 \u5b57\u8282\u6d41\u5c31\u50cf\u5728\u786c\u4ef6\u7aef\u53e3\u548c\u6587\u4ef6\u7cfb\u7edf\u642d\u5efa\u8d77\u4e86\u4e00\u4e2a\u4f20\u9001\u7ba1\u9053\uff0c \u5b57\u8282\u9010\u4e2a\u901a\u8fc7\u7ba1\u9053\u4f20\u8f93\u5e76\u5448\u73b0\u7ed9\u8bfb\u5199\u53cc\u65b9\u3002 \u8fd9\u4e2a\u6d41\u7279\u6027\u5728\u9a71\u52a8\u7a0b\u5e8f\u4e2d\u662f\u4ee5\u7f13\u51b2\u961f\u5217\u6765\u5b9e\u73b0\u7684\u3002\u4f8b\u5982: \u63a7\u5236\u53f0\u7684\u7ed3\u6784\u4f53\u4e2d\u7684\u8bfb\u5199\u7f13\u51b2\u961f\u5217<\/p>\n<\/li>\n<\/ul>\n

      struct tty_struct {\nstruct termios termios;\nint pgrp;\nint stopped;\nvoid (*write)(struct tty_struct * tty);\nstruct tty_queue read_q;               \/\/\u8bfb\u961f\u5217\nstruct tty_queue write_q;              \/\/\u5199\u961f\u5217\nstruct tty_queue secondary;            \/\/tty\u8f85\u52a9\u961f\u5217(\u5b58\u653e\u89c4\u683c\u5316\u540e\u7684\u5b57\u7b26)\n};<\/pre>\n
        \n
      • \n
        \u5b57\u7b26\u8bbe\u5907\u7531\u5b57\u7b26\u8bbe\u5907\u53f7\u6807\u8bc6\u3002\u5b57\u7b26\u8bbe\u5907\u53f7\u7531\u4e3b\u8bbe\u5907\u53f7\u548c\u6b21\u8bbe\u5907\u53f7\u6784\u6210\uff0c \u4f8b\u5982\/dev\/ttyS0\u7684\u8bbe\u5907\u53f7\u4e3a(4\uff0c64); \u4e3b\u8bbe\u5907\u53f7\u6807\u8bc6\u8bbe\u5907\u5bf9\u5e94\u9a71\u52a8\u7a0b\u5e8f\uff0c \u5185\u6838\u901a\u8fc7\u4e3b\u8bbe\u5907\u53f7\u5c06\u8bbe\u5907\u548c\u9a71\u52a8\u7a0b\u5e8f\u4e00\u4e00\u5bf9\u5e94\u8d77\u6765\uff0c \u6b21\u8bbe\u5907\u53f7\u7531\u9a71\u52a8\u7a0b\u5e8f\u4f7f\u7528\uff0c \u7528\u4e8e\u9a71\u52a8\u7a0b\u5e8f\u5185\u90e8\u533a\u5206\u8bbe\u5907\u7ec6\u8282\u5dee\u522b\u4f7f\u7528\u7684\u4ee3\u7801\uff0c\u5185\u6838\u5176\u4ed6\u90e8\u5206\u4e0d\u4f7f\u7528\u5b83\u3002<\/p>\n<\/li>\n<\/ul>\n
        \u5b57\u7b26\u8bbe\u5907\u5728\u5e94\u7528\u5c42\u5982\u4f55\u4f53\u73b0<\/strong><\/h3>\n
        cat \/proc\/devices<\/code> \u547d\u4ee4\u53ef\u4ee5\u67e5\u770b\u5f53\u524d\u7cfb\u7edf\u4e2d\u6240\u6709\u7684\u5b57\u7b26\u8bbe\u5907\u548c\u5757\u8bbe\u5907\u3002<\/p>\n
        \"linux\u4e0b\u6709\u54ea\u4e9b\u5b57\u7b26\u8bbe\u5907\u63d2\u56fe\"<\/p>\n
        \"linux\u4e0b\u6709\u54ea\u4e9b\u5b57\u7b26\u8bbe\u5907\u63d2\u56fe1\"<\/p>\n
        \u5728Linux \u4e2d\u4e00\u5207\u63a5\u6587\u4ef6\uff0c\u8bbe\u5907\u4e5f\u88ab\u62bd\u8c61\u6210\u6587\u4ef6\uff0c\u5728\/dev\/ \u76ee\u5f55\u4e0b\u53ef\u4ee5\u67e5\u770b\u5230\u5b57\u7b26\u8bbe\u5907\u548c\u5757\u8bbe\u5907\u7684\u5bf9\u5e94\u7684\u6587\u4ef6\u3002
         \u4f8b\u5982\u8fd9\u662f\u4e24\u4e2a\u4e32\u53e3\u8bbe\u5907\u6587\u4ef6\uff0c\u4f7f\u7528ls -l \u67e5\u770b\u5b83\u7684\u8be6\u7ec6\u4fe1\u606f\u3002
         \u4e0e\u666e\u901a\u6587\u4ef6\u4e0d\u540c\u7684\u662f\u8bbe\u5907\u6587\u4ef6\u6ca1\u6709\u5927\u5c0f\uff0c\u800c\u662f\u88ab\u66ff\u6362\u6210\u4e86\u8bbe\u5907\u53f7\uff08\u4e3b\u8bbe\u5907\u53f7\u548c\u6b21\u8bbe\u5907\u53f7\uff09\uff0c\u8bbe\u5907\u53f7\u53ef\u4ee5\u4e0e\/proc\/devices \u4e2d\u7684\u4fe1\u606f\u76f8\u5bf9\u5e94\u3002<\/p>\n
        \"linux\u4e0b\u6709\u54ea\u4e9b\u5b57\u7b26\u8bbe\u5907\u63d2\u56fe2\"<\/p>\n
        \u5982\u4f55\u8bbf\u95ee\u4e00\u4e2a\u8bbe\u5907\uff1f<\/p>\n
        \u65e2\u7136\u5b83\u88ab\u62bd\u8c61\u6210\u4e86\u4e00\u4e2a\u6587\u4ef6\uff0c\u90a3\u4e48\u81ea\u7136\u5c31\u7528\u6587\u4ef6IO (open\u3001read\u3001write \u7b49\u7b49) \u6765\u8bbf\u95ee\u3002<\/p>\n
        \u8bbe\u5907\u53f7<\/strong><\/h3>\n
        \"linux\u4e0b\u6709\u54ea\u4e9b\u5b57\u7b26\u8bbe\u5907\u63d2\u56fe3\"<\/p>\n
        dev_t dev = MKDEV(major,minor)<\/code>
        major = MAJOR(dev)<\/code>
        minor = MINOR(dev)<\/code><\/p>\n
        \u8bbe\u5907\u53f7\u7531major\u548cminor \u7ec4\u6210\uff0c\u603b\u517132\u4f4d\uff0c\u9ad812\u4f4d\u4e3amajor\uff0c\u4f4e20\u4f4d\u4e3aminor\u3002\u6bcf\u4e00\u4e2a\u8bbe\u5907\u53f7\u90fd\u552f\u4e00\u5bf9\u5e94\u7740\u4e00\u4e2acdev\u7ed3\u6784\u4f53\u3002<\/strong><\/p>\n
        \u6ce8\u518c\u5b57\u7b26\u8bbe\u5907\u9996\u5148\u8981\u7533\u8bf7\u8bbe\u5907\u53f7\uff0c\u53ef\u4ee5\u4e00\u6b21\u6279\u91cf\u7684\u7533\u8bf7\u591a\u4e2a\u8bbe\u5907\u53f7\uff08\u76f8\u540c\u7684major\uff0c\u4f9d\u6b21\u9012\u589e\u7684minor\uff09\u3002
         \u5982\u679c\u6ca1\u6709\u6307\u5b9a\u4e3b\u8bbe\u5907\u53f7\u7684\u8bdd\u5c31\u4f7f\u7528\u5982\u4e0b\u51fd\u6570\u6765\u7533\u8bf7\u8bbe\u5907\u53f7\uff1a
        int alloc_chrdev_region(dev_t *dev, unsigned baseminor, unsigned count, const char *name)<\/code>
         baseminor\uff1a\u8d77\u59cb\u7684minor\u503c\u3002
         count\uff1a\u4e00\u5171\u7533\u8bf7\u51e0\u4e2a\u8bbe\u5907\u53f7\u3002\u7533\u8bf7\u5230\u7684\u8bbe\u5907\u53f7\u5728(MKDEV(major,baseminor) ~ MKDEV(major,baseminor+count)) \u8303\u56f4\u5185\u3002
         \uff08\u81ea\u52a8\u7533\u8bf7\u8bbe\u5907\u53f7\u7684\u539f\u7406\uff0c\u5176\u5b9e\u662f\u4f20\u9012\u4e00\u4e2amajor = 0\uff0c\u7136\u540e\u7531\u5185\u6838\u5206\u914d\u4e00\u4e2a\u7a7a\u95f2\u7684\u8bbe\u5907\u53f7\u8fd4\u56de\uff09<\/p>\n
        \u5982\u679c\u7ed9\u5b9a\u4e86\u8bbe\u5907\u7684\u4e3b\u8bbe\u5907\u53f7\u548c\u6b21\u8bbe\u5907\u53f7\u5c31\u4f7f\u7528\u5982\u4e0b\u6240\u793a\u51fd\u6570\u6765\u6ce8\u518c\u8bbe\u5907\u53f7\u5373\u53ef\uff1a
        int register_chrdev_region(dev_t from, unsigned count, const char *name)<\/code><\/p>\n
        \u91ca\u653e\u8bbe\u5907\u53f7\uff1a
        void unregister_chrdev_region(dev_t from, unsigned count)<\/code><\/p>\n
        \u5b57\u7b26\u8bbe\u5907\u7ed3\u6784\u4f53 cdev<\/strong><\/h3>\n
        \/\/include\/linux\/cdev.h\nstruct cdev {\n        struct kobject kobj;\n        struct module *owner;\n        const struct file_operations *ops;\n        struct list_head list;\n        dev_t dev;\n        unsigned int count;\n};<\/pre>\n
        \u5e38\u7528<\/strong><\/p>\n
        \u7533\u8bf7\u4e00\u4e2acdev \u5185\u5b58\uff1a
        struct cdev *cdev_alloc(void);<\/code>
         \u521d\u59cb\u5316cdev->ops\uff0c\u5373cdev->ops = &xxx_file_operation; \uff1a
        void cdev_init(struct cdev *, const struct file_operations *);<\/code>
         \u5c06\u586b\u5145\u597d\u7684cdev \u5b9e\u4f8b\uff0c\u6dfb\u52a0\u5230cdev \u94fe\u8868\u3002\u610f\u5473\u7740\u5411\u5185\u6838\u6ce8\u518c\u4e00\u4e2a\u5b57\u7b26\u8bbe\u5907\uff1a
        int cdev_add(struct cdev *, dev_t, unsigned);<\/code> \/\/dev_t\uff1a\u6dfb\u52a0cdev\u65f6\u5fc5\u987b\u8981\uff0c\u4f20\u9012\u4e00\u4e2adev_t\uff0c\u5e76\u4e14\u5b83\u4e0ecdev\u662f\u552f\u4e00\u5bf9\u5e94\u7684\u3002
         cdev_add \u6dfb\u52a0\u8fc7\u7a0b\u4e2d\u4f1a\u7ed1\u5b9acdev \u4e0edev_t\u3002<\/p>\n
        \u4ece\u5185\u6838\u5220\u9664\u4e00\u4e2a\u5b57\u7b26\u8bbe\u5907\uff1a
        void cdev_del(struct cdev *);<\/code><\/p>\n
        \u4e0d\u5e38\u7528<\/strong>
         \u589e\u52a0cdev \u8c03\u7528\u8ba1\u6570\uff1a
        void cdev_put(struct cdev *p);<\/code><\/p>\n
        \u603b\u7ed3\uff1a\u6ce8\u518c\u5b57\u7b26\u8bbe\u5907\u7684\u4e3b\u8981\u6d41\u7a0b\u5c31\u662f\uff0c\u7533\u8bf7\u8bbe\u5907\u53f7dev_t\uff0c\u521b\u5efa\u4e00\u4e2acdev\u3001\u521d\u59cb\u5316cdev (cdev->ops)\u3001\u5411\u5185\u6838\u6dfb\u52a0 cdev\uff08\u540c\u65f6\u4f1a\u7ed1\u5b9acdev \u4e0edev_t\uff09\u3002<\/strong><\/p>\n
        \u5982\u679c\u4f60\u5acc\u8fd9\u4e9b\u6b65\u9aa4\u592a\u9ebb\u70e6\u7684\u8bdd\uff0c\u5185\u6838\u8fd8\u63d0\u4f9b\u4e86\u4e00\u4e2a\u51fd\u6570\u53ef\u4ee5\u4e00\u6b65\u5230\u4f4d\u7684\u6ce8\u518c\u5b57\u7b26\u8bbe\u5907\u2014\u2014__register_chrdev<\/code>
         \u5b83\u4f1a\u7533\u8bf7\u591a\u4e2a\u8bbe\u5907\u53f7\uff0c\u521b\u5efacdev\u5e76\u521d\u59cb\u5316\u5b83\uff0c\u7136\u540e\u7528\u8fd9\u591a\u4e2a\u8bbe\u5907\u53f7\u7ed1\u5b9a\u540c\u4e00\u4e2acdev \u6ce8\u518c\u3002<\/p>\n
        \"linux\u4e0b\u6709\u54ea\u4e9b\u5b57\u7b26\u8bbe\u5907\u63d2\u56fe4\"<\/p>\n
        \u8fd8\u6709\u4e00\u4e2aregister_chrdev<\/code>\uff0c\u5b83\u662f\u5bf9__register_chrdev \u7684\u5c01\u88c5\uff0c\u6b21\u8bbe\u5907\u53f7\u4ece\u57fa\u503c0\u5f00\u59cb\uff0c\u76f4\u63a5\u7533\u8bf7\u4e86256 \u4e2a\u6b21\u8bbe\u5907\u53f7\u3002
        static inline int register_chrdev(unsigned int major, const char *name, const struct file_operations *fops) { return __register_chrdev(major, 0, 256, name, fops); }<\/code><\/p>\n
        struct file_operations<\/strong><\/h4>\n
        \u5b57\u7b26\u8bbe\u5907\u5728\/dev\/ \u76ee\u5f55\u4e0b\u521b\u5efa\u8bbe\u5907\u6587\u4ef6\uff0c\u5e76\u901a\u8fc7struct file_operations \u5411\u5e94\u7528\u5c42\u63d0\u4f9b\u63a7\u5236\u63a5\u53e3\u3002\u5e94\u7528\u5c42\u5bf9\u5e94\u7684open\u3001read \u7b49\u51fd\u6570\u4f1a\u8c03\u7528\u5230file_operations \u5bf9\u5e94\u7684\u51fd\u6570\u3002<\/p>\n
        \/\/include\/linux\/fs.h\nstruct file_operations {\n        struct module *owner;\n        loff_t (*llseek) (struct file *, loff_t, int);\n        ssize_t (*read) (struct file *, char __user *, size_t, loff_t *);\n        ssize_t (*write) (struct file *, const char __user *, size_t, loff_t *);\n        ssize_t (*read_iter) (struct kiocb *, struct iov_iter *);\n        ssize_t (*write_iter) (struct kiocb *, struct iov_iter *);\n        int (*iterate) (struct file *, struct dir_context *);\n        unsigned int (*poll) (struct file *, struct poll_table_struct *);\n        long (*unlocked_ioctl) (struct file *, unsigned int, unsigned long);\n        long (*compat_ioctl) (struct file *, unsigned int, unsigned long);\n        int (*mmap) (struct file *, struct vm_area_struct *);\n        int (*mremap)(struct file *, struct vm_area_struct *);\n        int (*open) (struct inode *, struct file *);\n        int (*flush) (struct file *, fl_owner_t id);\n        int (*release) (struct inode *, struct file *);\n        int (*fsync) (struct file *, loff_t, loff_t, int datasync);\n        int (*aio_fsync) (struct kiocb *, int datasync);\n        int (*fasync) (int, struct file *, int);\n        int (*lock) (struct file *, int, struct file_lock *);\n        ssize_t (*sendpage) (struct file *, struct page *, int, size_t, loff_t *, int);\n        unsigned long (*get_unmapped_area)(struct file *, unsigned long, unsigned long, unsigned long, unsigned long);\n        int (*check_flags)(int);\n        int (*flock) (struct file *, int, struct file_lock *);\n        ssize_t (*splice_write)(struct pipe_inode_info *, struct file *, loff_t *, size_t, unsigned int);\n        ssize_t (*splice_read)(struct file *, loff_t *, struct pipe_inode_info *, size_t, unsigned int);\n        int (*setlease)(struct file *, long, struct file_lock **, void **);\n        long (*fallocate)(struct file *file, int mode, loff_t offset,\n                          loff_t len);\n        void (*show_fdinfo)(struct seq_file *m, struct file *f);\n#ifndef CONFIG_MMU\n        unsigned (*mmap_capabilities)(struct file *);\n#endif\n};<\/pre>\n
        copy_to_user() \u4e0e copy_from_user()<\/strong><\/p>\n
        \u4e3a\u4e86\u5b89\u5168\u8003\u8651\uff0c\u5e94\u7528\u8fdb\u7a0b\u4e0d\u80fd\u76f4\u63a5\u8bbf\u95ee\u5185\u6838\u6570\u636e\uff0c\u9700\u8981\u501f\u52a9\u8fd9\u4e24\u4e2a\u51fd\u6570\u62f7\u8d1d\uff1a
        static inline int copy_to_user(void __user volatile *to, const void *from, unsigned long n)<\/code>
        static inline int copy_from_user(void *to, const void __user volatile *from, unsigned long n)<\/code>
         \u8fd4\u56de\u975e0 \u8868\u793a\u9519\u8bef\u3002<\/p>\n
        \u81ea\u52a8\u521b\u5efa\u8bbe\u5907\u6587\u4ef6<\/strong><\/h3>\n
        \u81ea\u52a8\u521b\u5efa\u8bbe\u5907\u8282\u70b9\u7684\u5de5\u4f5c\u662f\u5728\u9a71\u52a8\u7a0b\u5e8f\u7684\u5165\u53e3\u51fd\u6570\u4e2d\u5b8c\u6210\u7684\uff0c\u4e00\u822c\u5728 cdev_add \u51fd\u6570\u540e\u9762\u6dfb\u52a0\u81ea\u52a8\u521b\u5efa\u8bbe\u5907\u8282\u70b9\u76f8\u5173\u4ee3\u7801\u3002\u9996\u5148\u8981\u521b\u5efa\u4e00\u4e2a class \u7c7b\uff0c class \u662f\u4e2a\u7ed3\u6784\u4f53\uff0c\u5b9a\u4e49\u5728\u6587\u4ef6include\/linux\/device.h \u91cc\u9762\u3002<\/p>\n
        \u4f7f\u7528 class_create \u521b\u5efa\u4e00\u4e2a\u7c7b\uff1a<\/p>\n
        extern struct class * __must_check __class_create(struct module *owner,\n                                                  const char *name,\n                                                  struct lock_class_key *key);\n\n#define class_create(owner, name)               \\\n({                                              \\\n        static struct lock_class_key __key;     \\\n        __class_create(owner, name, &__key);    \\\n})<\/pre>\n
        \u4f7f\u7528class_destroy \u6467\u6bc1\u4e00\u4e2a\u7c7b\uff1a
        extern void class_destroy(struct class *cls);<\/code><\/p>\n
        struct class {\n        const char              *name;\n        struct module           *owner;\n\n        struct class_attribute          *class_attrs;\n        const struct attribute_group    **dev_groups;\n        struct kobject                  *dev_kobj;\n\n        int (*dev_uevent)(struct device *dev, struct kobj_uevent_env *env);\n        char *(*devnode)(struct device *dev, umode_t *mode);\n\n        void (*class_release)(struct class *class);\n        void (*dev_release)(struct device *dev);\n\n        int (*suspend)(struct device *dev, pm_message_t state);\n        int (*resume)(struct device *dev);\n\n        const struct kobj_ns_type_operations *ns_type;\n        const void *(*namespace)(struct device *dev);\n\n        const struct dev_pm_ops *pm;\n\n        struct subsys_private *p;\n};<\/pre>\n
        \u5728\u521b\u5efa\u5b8c\u7c7b\u540e\uff0c\u8981\u521b\u5efa\u4e00\u4e2a\u8bbe\u5907\uff0c\u4f7f\u7528 device_create\u521b\u5efa\u4e00\u4e2a\u8bbe\u5907\uff1a
        struct device *device_create(struct class *cls, struct device *parent, dev_t devt, void *drvdata, const char *fmt, ...);<\/code><\/p>\n
        \u6467\u6bc1\u4e00\u4e2a\u8bbe\u5907\uff1a
        extern void device_destroy(struct class *cls, dev_t devt);<\/code><\/p>\n
        \u521b\u5efa\u7c7b\u4f1a\u5728\/sys\/class\/ \u76ee\u5f55\u4e0b\u751f\u6210\u4e00\u4e2a\u65b0\u7684\u6587\u4ef6\u5939\uff0c\u5176\u4e2d\u5305\u542b\u5c5e\u4e8e\u6b64\u7c7b\u7684\u8bbe\u5907\u6587\u4ef6\u5939\u3002<\/p>\n
        \"linux\u4e0b\u6709\u54ea\u4e9b\u5b57\u7b26\u8bbe\u5907\u63d2\u56fe5\"<\/p>\n
        IS_ERR \u548c PTR_ERR<\/strong><\/h3>\n
        IS_ERR \u53ef\u4ee5\u5224\u65ad\u4e00\u4e2a\u6307\u9488\u662f\u5426\u4e3a\u7a7a\uff0cPTR_ERR \u5c06\u6307\u9488\u8f6c\u5316\u4e3a\u6570\u503c\u8fd4\u56de\u3002<\/p>\n
        static inline long __must_check PTR_ERR(const void *ptr)\n{\n\treturn (long) ptr;\n}\n\nstatic inline long __must_check IS_ERR(const void *ptr)\n{\n\treturn IS_ERR_VALUE((unsigned long)ptr);\n}<\/pre>\n
        \u4ee3\u7801\u793a\u4f8b<\/strong><\/p>\n
        #include <linux\/fs.h>\t\t \/\/file_operations\u58f0\u660e\n#include <linux\/module.h>    \/\/module_init  module_exit\u58f0\u660e\n#include <linux\/init.h>      \/\/__init  __exit \u5b8f\u5b9a\u4e49\u58f0\u660e\n#include <linux\/device.h>\t \/\/class  devise\u58f0\u660e\n#include <linux\/uaccess.h>   \/\/copy_from_user \u7684\u5934\u6587\u4ef6\n#include <linux\/types.h>     \/\/\u8bbe\u5907\u53f7  dev_t \u7c7b\u578b\u58f0\u660e\n#include <asm\/io.h>          \/\/ioremap iounmap\u7684\u5934\u6587\u4ef6\n\n#define DEVICE_CNT 0\t\/\/\u8bbe\u5907\u53f7\u4e2a\u6570\n\nstruct led_device{\n\tdev_t devid;\t\/\/\u8bbe\u5907\u53f7\n\tint major;\t\/\/\u4e3b\u8bbe\u5907\u53f7\n\tint minor;\t\/\/\u6b21\u8bbe\u5907\u53f7\n\tchar* name = \"led\";\t\/\/\u9a71\u52a8\u540d\n\tstruct cdev led_dev;\t\/\/cdev \u7ed3\u6784\u4f53\n\tstruct class *class;\t\/* \u7c7b \t*\/\n\tstruct device* device;\t\/\/\u8bbe\u5907\n};\n\nstruct led_device led;\n\n\nstatic int led_open(struct inode *inode, struct file *filp)\n{\n\treturn 0;\n}\n\nstatic ssize_t led_write(struct file *filp, const char __user *buf, size_t cnt, loff_t *offt)\n{\n\treturn 0;\n}\n\n\nstatic ssize_t led_read(struct file *filp, char __user *buf, size_t cnt, loff_t *offt)\n{\n\treturn 0;\n}\n\n\n\n\/* \u8bbe\u5907\u64cd\u4f5c\u51fd\u6570 *\/\nstatic struct file_operations led_fo = {\n\t.owner = THIS_MODULE,\n\t.open = led_open,\n\t.read = led_read,\n\t.write = led_write,\n};\n\nstatic int _init led_init()\n{\n\t\/*\u6ce8\u518c\u5b57\u7b26\u8bbe\u5907\u9a71\u52a8*\/\n\t\n\t\/*1.\u6ce8\u518c\u8bbe\u5907\u53f7*\/\n\tled.major = 0;\t\/\/\u7531\u5185\u6838\u81ea\u52a8\u5206\u914d\u4e3b\u8bbe\u5907\u53f7\n\tif(led.major)\t\/\/\u5982\u679c\u5206\u914d\u4e86\u7684\u8bdd\u5c31\u6ce8\u518c\n\t{\n\t\tled.devid = MKDEV(led.major,0);\t\n\t\tregister_chrdev_region(led.devid,DEVICE_CNT,led.name);\t\/\/\u5c06\u9a71\u52a8\u6ce8\u518c\u5230\u5185\u6838\u4e2d\n\t}\n\telse{\t\t\/\/\u5982\u679c\u6ca1\u6709\u5206\u914d\u7684\u8bdd\n\t\t\t\t\t\/\/\u4ece0\u53f7\uff08\u6b21\u8bbe\u5907\u53f7\uff09\u5f00\u59cb\u7533\u8bf7\n\t\talloc_chrdev_region(&led.devid,0,DEVICE_CNT,led.name);\t\t\/\/\u7533\u8bf7\u8bbe\u5907\u53f7\n\t\tled.major = MAJOR(led.devid);\t\/\/\u83b7\u53d6\u4e3b\u8bbe\u5907\u53f7\n\t\tled.minor = MANOR(led.devid);\t\/\/\u83b7\u53d6\u6b21\u8bbe\u5907\u53f7\n\t}\n\tprintk(\"newcheled major=%d,minor=%d\\r\\n\",newchrled.major, newchrled.minor);\t\n\n\t\/*2.\u521d\u59cb\u5316 cdev \u7ed3\u6784\u4f53*\/\n\tled.led_dev.woner = THIS_MODULE;\n\tcdev_init(&led.led_dev,&led_fo);\t\/\/\u5c06\u64cd\u4f5c\u51fd\u6570\u521d\u59cb\u5316\u5230cdev\u7ed3\u6784\u4f53\n\n\t\/*3.\u5e94\u8be5\u662f\u5411\u94fe\u8868\u4e2d\u6dfbcdev*\/\n\tcdev_add(&led.led_dev,led.devid,DEVICE_CNT);\t\n\n\t\/*4.\u521b\u5efa\u8282\u70b9*\/\n\tled.class = class_create(THIS_MODULE,led.name);\t\t\/\/\u5148\u521b\u5efa\u4e00\u4e2a\u7c7b\n\tled.device = device_create(led.class,NULL,led.devid,NULL);\t\/\/\u521b\u5efa\u8bbe\u5907\n\n\treturn 0;\n\t\t\n}\n\nstatic void _exit led_exit()\n{\n\t\/* \u6ce8\u9500\u5b57\u7b26\u8bbe\u5907\u9a71\u52a8 *\/\n\tcdev_del(&newchrled.cdev);\/*  \u5220\u9664cdev *\/\n\tunregister_chrdev_region(newchrled.devid, NEWCHRLED_CNT); \/* \u6ce8\u9500\u8bbe\u5907\u53f7 *\/\n\n\tdevice_destroy(newchrled.class, newchrled.devid);\n\tclass_destroy(newchrled.class);\n}\n\n\n\n\/*\u6ce8\u518c\u5b57\u7b26\u8bbe\u5907\u5165\u53e3\u4e0e\u5378\u8f7d\u5165\u53e3*\/\nmodule_init(led_init);\nmodule_exit(led_exit);\nMODULE_LICENSE(\"GPL v2\");\nMODULE_AUTHOR(\"zhoujianghong\");<\/pre>\n
        \u5e94\u7528open\u5230file_operations->open \u7684\u8c03\u7528\u539f\u7406<\/p>\n
        \"linux\u4e0b\u6709\u54ea\u4e9b\u5b57\u7b26\u8bbe\u5907\u63d2\u56fe6\"<\/p>\n
        \u4ee5\u4e0a\u5c31\u662f\u672c\u6587\u7684\u5168\u90e8\u5185\u5bb9\u4e86\uff0c\u662f\u5426\u6709\u987a\u5229\u5e2e\u52a9\u4f60\u89e3\u51b3\u95ee\u9898\uff1f\u82e5\u662f\u80fd\u7ed9\u4f60\u5e26\u6765\u5b66\u4e60\u4e0a\u7684\u5e2e\u52a9\uff0c\u8bf7\u5927\u5bb6\u591a\u591a\u652f\u6301\u7c73\u4e91\uff01\u66f4\u591a\u5173\u4e8e\u6587\u7ae0\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u4e5f\u53ef\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
        linux\u4e0b\u6709\u54ea\u4e9b\u5b57\u7b26\u8bbe\u5907 \u5c0f\u4f19\u4f34\u4eec\u5bf9\u6587\u7ae0\u7f16\u7a0b\u611f\u5174\u8da3\u5417\uff1f\u662f\u5426\u6b63\u5728\u5b66\u4e60\u76f8\u5173\u77e5\u8bc6\u70b9\uff1f\u5982\u679c\u662f\uff0c\u90a3\u4e48\u672c\u6587\u300alinux\u4e0b\u6709\u54ea\u4e9b\u5b57\u7b26\u8bbe\u5907\u300b\uff0c\u5c31\u5f88\u9002\u5408\u4f60\uff0c\u672c\u7bc7\u6587\u7ae0\u8bb2\u89e3\u7684\u77e5\u8bc6\u70b9\u4e3b\u8981\u5305\u62ec\u3002\u5728\u4e4b\u540e\u7684\u6587\u7ae0\u4e2d\u4e5f\u4f1a\u591a\u591a\u5206\u4eab\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff01 linux\u5b57\u7b26\u8bbe\u5907\u6709\uff1a1\u3001\u9f20\u6807\uff0c\u662f\u8ba1\u7b97\u673a\u7684\u4e00\u79cd\u5916\u63a5\u8f93\u5165\u8bbe\u5907\uff0c\u4e5f\u662f\u8ba1\u7b97\u673a\u663e\u793a\u7cfb\u7edf\u7eb5\u6a2a\u5750\u6807\u5b9a\u4f4d\u7684\u6307\u793a\u5668\uff1b2\u3001\u952e\u76d8\uff0c\u662f\u7528\u4e8e\u64cd\u4f5c\u8ba1\u7b97\u673a\u8bbe\u5907\u8fd0\u884c\u7684\u4e00\u79cd\u6307\u4ee4\u548c\u6570\u636e\u8f93\u5165\u88c5\u7f6e\uff1b3\u3001\u4e32\u884c\u7aef\u53e3\u7ec8\u7aef\uff0c\u4f7f\u7528\u8ba1\u7b97\u673a\u4e32\u884c\u7aef\u53e3\u8fde\u63a5\u7684\u7ec8\u7aef\u8bbe\u5907\uff1b4\u3001\u63a7\u5236\u7ec8\u7aef\uff1b5\u3001\u63a7\u5236\u53f0\u7b49\u3002 linux\u5b57\u7b26\u8bbe\u5907 \u5b57\u7b26\u8bbe\u5907\u662fLinux\u4e09\u5927\u8bbe\u5907\u4e4b\u4e00\uff08\u53e6\u5916\u4e24\u79cd\u662f\u5757\u8bbe\u5907\uff0c\u7f51\u7edc\u8bbe\u5907\uff09\u3002\u5b83\u4eec\u5747\u4ee5\u4e00\u4e2a\u6587\u4ef6\u8282\u70b9\u5f62\u5f0f\u663e\u793a\u5728\u6587\u4ef6\u7cfb\u7edf\u7684\/dev\u76ee\u5f55\u4e0b(crw–w—- 1 root tty 4\uff0c 0 7\u6708 11 09:11 tty0 \u5176\u4e2dc\u4ee3\u8868\u5b57\u7b26\u8bbe\u5907\u7c7b\u578b)\u3002 \u5b57\u7b26\u8bbe\u5907\u662f\u6307\u8bbe\u5907\u65e0\u9700\u7f13\u51b2\u5373\u53ef\u76f4\u63a5\u8fdb\u884c\u8bfb\u5199\u7684\u8bbe\u5907\uff0c \u5982\u9f20\u6807\uff0c\u952e\u76d8\uff0c\u4e32\u53e3\u8bbe\u5907\u3001\u8c03\u5236\u89e3\u8c03\u5668\u7b49\uff0c \u5b83\u4e0e\u5757\u8bbe\u5907\u7684\u533a\u522b\u5728\u4e8e\u662f\u5b57\u7b26\u64cd\u4f5c\u7684\u57fa\u672c\u5355\u4f4d\u662f\u5b57\u8282\u3002 \u5b57\u7b26\u8bbe\u5907\u7684\u5206\u7c7b \u5b57\u7b26\u8bbe\u5907\u4e3b\u8981\u5305\u62ec\u63a7\u5236\u7ec8\u7aef\u8bbe\u5907\u548c\u4e32\u884c\u7ec8\u7aef\u8bbe\u5907\uff0c \u4f8b\u5982\u63a7\u5236\u53f0\u548c\u952e\u76d8\u3002\u4f9d\u636e\u529f\u80fd\u548c\u786c\u4ef6\u4e0a\u7684\u5dee\u522b\uff0c \u5b57\u7b26\u7ec8\u7aef\u8bbe\u5907\u6709\u5982\u4e0b\u5206\u7c7b: \u4e32\u884c\u7aef\u53e3\u7ec8\u7aef(\/dev\/ttSn)\uff1a\u4f7f\u7528\u8ba1\u7b97\u673a\u4e32\u884c\u7aef\u53e3\u8fde\u63a5\u7684\u7ec8\u7aef\u8bbe\u5907\uff0c \u4e32\u884c\u8bbe\u5907\u6570\u636e\u4f20\u8f93\u65b9\u5f0f\u4e3a\u540c\u4e00\u5b57\u7b268\u4e2abit\u5355\u7ebf\u4f20\u8f93\uff0c \u5728\u547d\u4ee4\u884c\u8f93\u5165 echo ‘hello world’ > \/dev\/ttyS0\u53ef\u5c06\u8f93\u5165\u5199\u5165\u5230\u5bf9\u5e94\u8bbe\u5907\u3002 \u4f2a\u7ec8\u7aef(\/dev\/ttyp\uff0c\/dev\/ptyp): \u5bf9\u5e94\u5e95\u5c42\u4e0d\u5b58\u5728\u771f\u5b9e\u7684\u786c\u4ef6\u8bbe\u5907\uff0c \u7528\u4e8e\u4e3a\u5176\u4ed6\u7a0b\u5e8f\u63d0\u4f9b\u7ec8\u7aef\u5f0f\u6837\u7684\u63a5\u53e3\uff0c\u5982\u7f51\u7edc\u767b\u9646\u4e3b\u673a\u65f6\u7f51\u7edc\u670d\u52a1\u5668\u548cshell\u7a0b\u5e8f\u4e4b\u95f4\u7684\u7ec8\u7aef\u63a5\u53e3\u3002 \u63a7\u5236\u7ec8\u7aef(\/dev\/tty)\uff1a\u4e3b\u8bbe\u5907\u53f7\u4e3a5\uff0c \u8fdb\u7a0b\u63a7\u5236\u7ec8\u7aef\uff0c\u4e0e\u8fdb\u7a0b\u76f8\u5173\u8054\uff0c\u5982\u767b\u9646shell\u8fdb\u7a0b\u4f7f\u7528\u7684\u5c31\u662f\u7ec8\u7aef\/dev\/tty\u3002 \u63a7\u5236\u53f0(\/dev\/ttyn\uff0c\/dev\/consol): \u8ba1\u7b97\u673a\u8f93\u5165\u8f93\u51fa\u7684\u663e\u793a\u5668\uff0c\u5f53\u63a7\u5236\u53f0\u767b\u9646\u65f6\uff0c \u4f7f\u7528\u7684\u5c31\u662ftty1\uff0c \u800cubuntu \u56fe\u5f62\u754c\u9762\u4f7f\u7528\u7684tty7\u3002 \u5176\u4ed6\u7c7b\u578b\uff1a\u73b0\u884c\u7684linux\u9488\u5bf9\u8bb8\u591a\u4e0d\u540c\u7684\u8bbe\u5907\u5efa\u6709\u8bb8\u591a\u5176\u4ed6\u79cd\u7c7b\u7684\u8bbe\u5907\u7279\u6b8a\u6587\u4ef6\uff0c\u5982ISIDIN\u8bbe\u5907\u7684\/dev\/ttyIn\u8bbe\u5907\u3002 \u5b57\u7b26\u8bbe\u5907\u7684\u6027\u8d28\u53ca\u7279\u70b9 \u5b57\u7b26\u8bbe\u5907\u5c5e\u4e8e\u8bbe\u5907\u6587\u4ef6\u7cfb\u7edf\u7684\u4e00\u79cd\uff0c \u76f8\u5f53\u4e8e\u5e95\u5c42\u786c\u4ef6\u5411\u4e0a\u5c42\u63d0\u4f9b\u7684\u903b\u8f91\u8bbe\u5907\u6587\u4ef6\uff0c \u5b9b\u5982\u5c06\u4e00\u4e2a\u6570\u636e\u7aef\u53e3(\u6570\u636e\u5bc4\u5b58\u5668)\u4e0e\u4e00\u4e2a\u6587\u4ef6\u5bf9\u63a5\u8d77\u6765\uff0c\u8bbe\u5907\u9a71\u52a8\u7a0b\u5e8f\u76f4\u63a5\u5bf9\u6587\u4ef6\u64cd\u4f5c\uff0c \u4e8e\u662f\u4fbf\u76f4\u63a5\u5bf9\u7aef\u53e3\u8fdb\u884c\u4e86\u8bfb\u5199\u64cd\u4f5c\u3002 \u540c\u6837\u4f5c\u4e3a\u6587\u4ef6\uff0c \u5b57\u7b26\u8bbe\u5907\u9a71\u52a8\u4e5f\u5fc5\u987b\u5b9e\u73b0\u6587\u4ef6\u7684\u57fa\u672c\u7684\u64cd\u4f5copen()\uff0cclose()\uff0cwrite()\uff0cread()\u7b49\uff0c\u5f53\u7136\u7ec8\u7aef\u91cd\u5b9a\u5411\u64cd\u4f5c\u4e5f\u662f\u652f\u6301\u7684\u3002 \u5b57\u7b26\u8bbe\u5907\u6587\u4ef6\u6587\u4ef6\u7684\u8bfb\u5199\u662f\u4ee5\u5355\u4e2a\u5b57\u8282\u4e3a\u5355\u4f4d\u7684\uff0c \u4e0d\u9700\u8981\u8bbe\u7acb\u786c\u4ef6\u7f13\u51b2\u533a\u3002 \u8bbe\u5907\u50cf\u8bbf\u95ee\u5b57\u8282\u6d41\u4e00\u6837\u88ab\u64cd\u4f5c\u7cfb\u7edf\u8bbf\u95ee\u3002 \u5b57\u8282\u6d41\u5c31\u50cf\u5728\u786c\u4ef6\u7aef\u53e3\u548c\u6587\u4ef6\u7cfb\u7edf\u642d\u5efa\u8d77\u4e86\u4e00\u4e2a\u4f20\u9001\u7ba1\u9053\uff0c \u5b57\u8282\u9010\u4e2a\u901a\u8fc7\u7ba1\u9053\u4f20\u8f93\u5e76\u5448\u73b0\u7ed9\u8bfb\u5199\u53cc\u65b9\u3002 \u8fd9\u4e2a\u6d41\u7279\u6027\u5728\u9a71\u52a8\u7a0b\u5e8f\u4e2d\u662f\u4ee5\u7f13\u51b2\u961f\u5217\u6765\u5b9e\u73b0\u7684\u3002\u4f8b\u5982: \u63a7\u5236\u53f0\u7684\u7ed3\u6784\u4f53\u4e2d\u7684\u8bfb\u5199\u7f13\u51b2\u961f\u5217 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-52036","post","type-post","status-publish","format-standard","hentry","category-os"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/52036","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=52036"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/52036\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=52036"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=52036"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=52036"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}