{"id":15777,"date":"2024-11-18T15:08:11","date_gmt":"2024-11-18T07:08:11","guid":{"rendered":"https:\/\/fwq.ai\/blog\/15777\/"},"modified":"2024-11-18T15:08:11","modified_gmt":"2024-11-18T07:08:11","slug":"%e9%85%8d%e7%bd%aelinux%e7%b3%bb%e7%bb%9f%e4%bb%a5%e6%94%af%e6%8c%81%e4%b8%b2%e5%8f%a3%e9%80%9a%e4%bf%a1%e7%bc%96%e7%a8%8b","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/15777\/","title":{"rendered":"\u914d\u7f6eLinux\u7cfb\u7edf\u4ee5\u652f\u6301\u4e32\u53e3\u901a\u4fe1\u7f16\u7a0b"},"content":{"rendered":"<p>\u914d\u7f6elinux\u7cfb\u7edf\u4ee5\u652f\u6301\u4e32\u53e3\u901a\u4fe1\u7f16\u7a0b<\/p>\n<p>\u4e32\u53e3\u901a\u4fe1\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u786c\u4ef6\u901a\u4fe1\u65b9\u5f0f\uff0c\u7528\u4e8e\u5728\u8ba1\u7b97\u673a\u4e0e\u5916\u90e8\u8bbe\u5907\u4e4b\u95f4\u8fdb\u884c\u6570\u636e\u4f20\u8f93\u3002\u5728Linux\u7cfb\u7edf\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u914d\u7f6e\u6765\u5b9e\u73b0\u5bf9\u4e32\u53e3\u7684\u652f\u6301\uff0c\u8fdb\u800c\u8fdb\u884c\u4e32\u53e3\u901a\u4fe1\u7f16\u7a0b\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u5728Linux\u7cfb\u7edf\u4e2d\u914d\u7f6e\u4e32\u53e3\uff0c\u5e76\u63d0\u4f9b\u4e86\u76f8\u5173\u7684\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n<p>\u4e00\u3001\u67e5\u770b\u4e32\u53e3\u8bbe\u5907<\/p>\n<p>\u5728Linux\u7cfb\u7edf\u4e2d\uff0c\u4e32\u53e3\u8bbe\u5907\u88ab\u79f0\u4e3aTTY\u8bbe\u5907\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u7ec8\u7aef\u547d\u4ee4ls \/dev\/ttyS*\u6765\u67e5\u770b\u7cfb\u7edf\u4e2d\u5b58\u5728\u7684\u4e32\u53e3\u8bbe\u5907\u3002\u901a\u5e38\uff0c\u5982\u679c\u7cfb\u7edf\u5b58\u5728\u4e32\u53e3\u8bbe\u5907\uff0c\u4f1a\u663e\u793a\u7c7b\u4f3c \/dev\/ttyS0 \u6216 \/dev\/ttyS1 \u7684\u8f93\u51fa\u3002\u5176\u4e2d\uff0c\/dev\/ttyS0 \u4ee3\u8868\u7b2c\u4e00\u4e2a\u4e32\u53e3\u8bbe\u5907\uff0c\/dev\/ttyS1 \u4ee3\u8868\u7b2c\u4e8c\u4e2a\u4e32\u53e3\u8bbe\u5907\uff0c\u4ee5\u6b64\u7c7b\u63a8\u3002<\/p>\n<p>\u4e8c\u3001\u914d\u7f6e\u4e32\u53e3\u53c2\u6570<\/p>\n<p>\u5728\u8fdb\u884c\u4e32\u53e3\u901a\u4fe1\u7f16\u7a0b\u4e4b\u524d\uff0c\u6211\u4eec\u9700\u8981\u914d\u7f6e\u4e32\u53e3\u7684\u53c2\u6570\uff0c\u5305\u62ec\u6ce2\u7279\u7387\u3001\u6570\u636e\u4f4d\u3001\u6821\u9a8c\u4f4d\u3001\u505c\u6b62\u4f4d\u7b49\u3002\u53ef\u4ee5\u901a\u8fc7\u7ec8\u7aef\u547d\u4ee4stty\u6765\u8fdb\u884c\u4e32\u53e3\u53c2\u6570\u7684\u914d\u7f6e\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\u547d\u4ee4\uff1a<\/p>\n<pre>stty -F \/dev\/ttyS0 9600 cs8 -cstopb -parenb<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u4e0a\u8ff0\u547d\u4ee4\u4e2d\uff0c\u201c-F \/dev\/ttyS0\u201d\u6307\u5b9a\u4e86\u8981\u914d\u7f6e\u7684\u4e32\u53e3\u8bbe\u5907\u4e3a\/dev\/ttyS0\uff0c9600\u662f\u6307\u5b9a\u7684\u6ce2\u7279\u7387\uff0ccs8\u8868\u793a\u6570\u636e\u4f4d\u4e3a8\u4f4d\uff0c-cstopb\u8868\u793a\u505c\u6b62\u4f4d\u4e3a1\u4f4d\uff0c-parenb\u8868\u793a\u4e0d\u8fdb\u884c\u5947\u5076\u6821\u9a8c\u3002\u6839\u636e\u9700\u8981\uff0c\u53ef\u4ee5\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u8c03\u6574\u8fd9\u4e9b\u53c2\u6570\u3002<\/p>\n<p>\u4e09\u3001\u6253\u5f00\u4e32\u53e3\u8bbe\u5907<\/p>\n<p>\u5728\u8fdb\u884c\u4e32\u53e3\u901a\u4fe1\u7f16\u7a0b\u4e4b\u524d\uff0c\u9700\u8981\u901a\u8fc7\u6253\u5f00\u4e32\u53e3\u8bbe\u5907\u6765\u8fdb\u884c\u64cd\u4f5c\u3002\u53ef\u4ee5\u4f7f\u7528open()\u51fd\u6570\u6765\u6253\u5f00\u4e32\u53e3\u8bbe\u5907\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n<pre>#include&lt;unistd.h&gt;\n#include&lt;fcntl.h&gt;\n#include&lt;errno.h&gt;\n\nint fd = open(\"\/dev\/ttyS0\", O_RDWR | O_NOCTTY | O_NONBLOCK);  \nif (fd == -1) {\n    perror(\"\u6253\u5f00\u4e32\u53e3\u8bbe\u5907\u5931\u8d25\");\n    return -1;\n}&lt;\/errno.h&gt;&lt;\/fcntl.h&gt;&lt;\/unistd.h&gt;<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0copen()\u51fd\u6570\u901a\u8fc7\u4f20\u5165\u4e32\u53e3\u8bbe\u5907\u8def\u5f84\/dev\/ttyS0\u4ee5\u53ca\u4e00\u4e9b\u6807\u5fd7\u6765\u6253\u5f00\u4e32\u53e3\u8bbe\u5907\u3002O_RDWR\u8868\u793a\u4ee5\u53ef\u8bfb\u5199\u7684\u65b9\u5f0f\u6253\u5f00\u8bbe\u5907\uff0cO_NOCTTY\u8868\u793a\u4e0d\u5c06\u6253\u5f00\u7684\u4e32\u53e3\u4f5c\u4e3a\u63a7\u5236\u7ec8\u7aef\uff0cO_NONBLOCK\u8868\u793a\u4ee5\u975e\u963b\u585e\u7684\u65b9\u5f0f\u6253\u5f00\u8bbe\u5907\u3002\u6253\u5f00\u6210\u529f\u540e\uff0c\u4f1a\u8fd4\u56de\u4e00\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26fd\u4f9b\u540e\u7eed\u4f7f\u7528\u3002<\/p>\n<p>\u56db\u3001\u8bbe\u7f6e\u4e32\u53e3\u53c2\u6570<\/p>\n<p>\u5728\u6253\u5f00\u4e32\u53e3\u8bbe\u5907\u540e\uff0c\u6211\u4eec\u9700\u8981\u4f7f\u7528tcgetattr()\u51fd\u6570\u83b7\u53d6\u4e32\u53e3\u7684\u539f\u59cb\u53c2\u6570\uff0c\u7136\u540e\u901a\u8fc7\u4fee\u6539\u8fd9\u4e9b\u53c2\u6570\u6765\u8fdb\u884c\u4e32\u53e3\u53c2\u6570\u7684\u914d\u7f6e\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n<pre>#include&lt;termios.h&gt;\n\nstruct termios options;\ntcgetattr(fd, &amp;amp;options);\n\ncfsetispeed(&amp;amp;options, B9600);   \/\/ \u8bbe\u7f6e\u8f93\u5165\u6ce2\u7279\u7387\u4e3a9600\ncfsetospeed(&amp;amp;options, B9600);   \/\/ \u8bbe\u7f6e\u8f93\u51fa\u6ce2\u7279\u7387\u4e3a9600\noptions.c_cflag |= CS8 | CLOCAL | CREAD;  \/\/ \u8bbe\u7f6e\u6570\u636e\u4f4d\u4e3a8\u4f4d\uff0c\u5e76\u5f00\u542f\u672c\u5730\u8fde\u63a5\u548c\u63a5\u6536\u4f7f\u80fd\noptions.c_cflag &amp;amp;= ~PARENB;    \/\/ \u5173\u95ed\u5947\u5076\u6821\u9a8c\noptions.c_cflag &amp;amp;= ~CSTOPB;    \/\/ \u8bbe\u7f6e\u505c\u6b62\u4f4d\u4e3a1\u4f4d\n\ntcsetattr(fd, TCSANOW, &amp;amp;options);&lt;\/termios.h&gt;<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0ctcgetattr()\u51fd\u6570\u7528\u4e8e\u83b7\u53d6\u4e32\u53e3\u7684\u539f\u59cb\u53c2\u6570\uff0c\u5e76\u5c06\u5176\u5b58\u50a8\u5728struct termios\u7ed3\u6784\u4f53\u53d8\u91cfoptions\u4e2d\u3002\u63a5\u7740\uff0c\u901a\u8fc7cfsetispeed()\u548ccfsetospeed()\u51fd\u6570\u8bbe\u7f6e\u8f93\u5165\u548c\u8f93\u51fa\u6ce2\u7279\u7387\u4e3a9600\uff0c\u518d\u901a\u8fc7\u4f4d\u64cd\u4f5c\u8bbe\u7f6e\u6570\u636e\u4f4d\u3001\u5947\u5076\u6821\u9a8c\u548c\u505c\u6b62\u4f4d\u7b49\u53c2\u6570\u3002\u6700\u540e\uff0c\u4f7f\u7528tcsetattr()\u51fd\u6570\u5c06\u4fee\u6539\u540e\u7684\u53c2\u6570\u5199\u56de\u4e32\u53e3\u4e2d\u3002<\/p>\n<p>\u4e94\u3001\u4e32\u53e3\u901a\u4fe1<\/p>\n<p>\u5728\u914d\u7f6e\u5b8c\u4e32\u53e3\u53c2\u6570\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528read()\u51fd\u6570\u4ece\u4e32\u53e3\u4e2d\u8bfb\u53d6\u6570\u636e\uff0c\u4f7f\u7528write()\u51fd\u6570\u5411\u4e32\u53e3\u4e2d\u5199\u5165\u6570\u636e\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u63a5\u6536\u4e32\u53e3\u6570\u636e\u7684\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n<pre>char buffer[255];\nint bytes_read = read(fd, buffer, sizeof(buffer));\nif (bytes_read == -1) {\n    perror(\"\u8bfb\u53d6\u4e32\u53e3\u6570\u636e\u5931\u8d25\");\n    return -1;\n}\n\nprintf(\"\u63a5\u6536\u5230\u7684\u6570\u636e\uff1a%s\n\", buffer);<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u5148\u5b9a\u4e49\u4e86\u4e00\u4e2a\u7f13\u51b2\u533abuffer\u7528\u4e8e\u5b58\u50a8\u63a5\u6536\u5230\u7684\u6570\u636e\u3002\u7136\u540e\uff0c\u4f7f\u7528read()\u51fd\u6570\u4ece\u4e32\u53e3\u4e2d\u8bfb\u53d6\u6570\u636e\uff0c\u5e76\u5c06\u8bfb\u53d6\u5230\u7684\u6570\u636e\u5b58\u50a8\u5728\u7f13\u51b2\u533a\u4e2d\u3002\u63a5\u7740\uff0c\u4f7f\u7528printf()\u51fd\u6570\u6253\u5370\u51fa\u63a5\u6536\u5230\u7684\u6570\u636e\u3002<\/p>\n<p>\u516d\u3001\u5173\u95ed\u4e32\u53e3\u8bbe\u5907<\/p>\n<p>\u5728\u7a0b\u5e8f\u7ed3\u675f\u540e\uff0c\u6211\u4eec\u9700\u8981\u5173\u95ed\u6253\u5f00\u7684\u4e32\u53e3\u8bbe\u5907\u3002\u53ef\u4ee5\u4f7f\u7528close()\u51fd\u6570\u6765\u5173\u95ed\u4e32\u53e3\u8bbe\u5907\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre>close(fd);<\/pre>\n<p>  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n<p>\u4e0a\u8ff0\u4ee3\u7801\u5c06\u5173\u95ed\u5148\u524d\u6253\u5f00\u7684\u4e32\u53e3\u8bbe\u5907\uff0c\u5e76\u91ca\u653e\u76f8\u5173\u7684\u8d44\u6e90\u3002<\/p>\n<p>\u901a\u8fc7\u4ee5\u4e0a\u7684\u914d\u7f6e\u548c\u4ee3\u7801\u793a\u4f8b\uff0c\u6211\u4eec\u53ef\u4ee5\u5728Linux\u7cfb\u7edf\u4e2d\u5b9e\u73b0\u4e32\u53e3\u901a\u4fe1\u7f16\u7a0b\u3002\u5f53\u7136\uff0c\u5b9e\u9645\u5e94\u7528\u4e2d\u8fd8\u9700\u8981\u8003\u8651\u66f4\u591a\u7684\u60c5\u51b5\uff0c\u5982\u5f02\u5e38\u5904\u7406\u3001\u7f13\u51b2\u533a\u7ba1\u7406\u7b49\u3002\u5e0c\u671b\u672c\u6587\u80fd\u591f\u4e3a\u60a8\u63d0\u4f9b\u4e00\u4e9b\u5e2e\u52a9\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u914d\u7f6eLinux\u7cfb\u7edf\u4ee5\u652f\u6301\u4e32\u53e3\u901a\u4fe1\u7f16\u7a0b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u914d\u7f6elinux\u7cfb\u7edf\u4ee5\u652f\u6301\u4e32\u53e3\u901a\u4fe1\u7f16\u7a0b \u4e32\u53e3\u901a\u4fe1\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u786c\u4ef6\u901a\u4fe1\u65b9\u5f0f\uff0c\u7528\u4e8e\u5728\u8ba1\u7b97\u673a\u4e0e\u5916\u90e8\u8bbe\u5907\u4e4b\u95f4\u8fdb\u884c\u6570\u636e\u4f20\u8f93\u3002\u5728Linux\u7cfb\u7edf\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u914d\u7f6e\u6765\u5b9e\u73b0\u5bf9\u4e32\u53e3\u7684\u652f\u6301\uff0c\u8fdb\u800c\u8fdb\u884c\u4e32\u53e3\u901a\u4fe1\u7f16\u7a0b\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u5728Linux\u7cfb\u7edf\u4e2d\u914d\u7f6e\u4e32\u53e3\uff0c\u5e76\u63d0\u4f9b\u4e86\u76f8\u5173\u7684\u4ee3\u7801\u793a\u4f8b\u3002 \u4e00\u3001\u67e5\u770b\u4e32\u53e3\u8bbe\u5907 \u5728Linux\u7cfb\u7edf\u4e2d\uff0c\u4e32\u53e3\u8bbe\u5907\u88ab\u79f0\u4e3aTTY\u8bbe\u5907\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u7ec8\u7aef\u547d\u4ee4ls \/dev\/ttyS*\u6765\u67e5\u770b\u7cfb\u7edf\u4e2d\u5b58\u5728\u7684\u4e32\u53e3\u8bbe\u5907\u3002\u901a\u5e38\uff0c\u5982\u679c\u7cfb\u7edf\u5b58\u5728\u4e32\u53e3\u8bbe\u5907\uff0c\u4f1a\u663e\u793a\u7c7b\u4f3c \/dev\/ttyS0 \u6216 \/dev\/ttyS1 \u7684\u8f93\u51fa\u3002\u5176\u4e2d\uff0c\/dev\/ttyS0 \u4ee3\u8868\u7b2c\u4e00\u4e2a\u4e32\u53e3\u8bbe\u5907\uff0c\/dev\/ttyS1 \u4ee3\u8868\u7b2c\u4e8c\u4e2a\u4e32\u53e3\u8bbe\u5907\uff0c\u4ee5\u6b64\u7c7b\u63a8\u3002 \u4e8c\u3001\u914d\u7f6e\u4e32\u53e3\u53c2\u6570 \u5728\u8fdb\u884c\u4e32\u53e3\u901a\u4fe1\u7f16\u7a0b\u4e4b\u524d\uff0c\u6211\u4eec\u9700\u8981\u914d\u7f6e\u4e32\u53e3\u7684\u53c2\u6570\uff0c\u5305\u62ec\u6ce2\u7279\u7387\u3001\u6570\u636e\u4f4d\u3001\u6821\u9a8c\u4f4d\u3001\u505c\u6b62\u4f4d\u7b49\u3002\u53ef\u4ee5\u901a\u8fc7\u7ec8\u7aef\u547d\u4ee4stty\u6765\u8fdb\u884c\u4e32\u53e3\u53c2\u6570\u7684\u914d\u7f6e\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\u547d\u4ee4\uff1a stty -F \/dev\/ttyS0 9600 cs8 -cstopb -parenb \u767b\u5f55\u540e\u590d\u5236 \u4e0a\u8ff0\u547d\u4ee4\u4e2d\uff0c\u201c-F \/dev\/ttyS0\u201d\u6307\u5b9a\u4e86\u8981\u914d\u7f6e\u7684\u4e32\u53e3\u8bbe\u5907\u4e3a\/dev\/ttyS0\uff0c9600\u662f\u6307\u5b9a\u7684\u6ce2\u7279\u7387\uff0ccs8\u8868\u793a\u6570\u636e\u4f4d\u4e3a8\u4f4d\uff0c-cstopb\u8868\u793a\u505c\u6b62\u4f4d\u4e3a1\u4f4d\uff0c-parenb\u8868\u793a\u4e0d\u8fdb\u884c\u5947\u5076\u6821\u9a8c\u3002\u6839\u636e\u9700\u8981\uff0c\u53ef\u4ee5\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u8c03\u6574\u8fd9\u4e9b\u53c2\u6570\u3002 \u4e09\u3001\u6253\u5f00\u4e32\u53e3\u8bbe\u5907 \u5728\u8fdb\u884c\u4e32\u53e3\u901a\u4fe1\u7f16\u7a0b\u4e4b\u524d\uff0c\u9700\u8981\u901a\u8fc7\u6253\u5f00\u4e32\u53e3\u8bbe\u5907\u6765\u8fdb\u884c\u64cd\u4f5c\u3002\u53ef\u4ee5\u4f7f\u7528open()\u51fd\u6570\u6765\u6253\u5f00\u4e32\u53e3\u8bbe\u5907\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u4ee3\u7801\u793a\u4f8b\uff1a #include&lt;unistd.h&gt; #include&lt;fcntl.h&gt; #include&lt;errno.h&gt; int fd = open(&#8220;\/dev\/ttyS0&#8221;, O_RDWR | O_NOCTTY | O_NONBLOCK); if (fd == -1) { perror(&#8220;\u6253\u5f00\u4e32\u53e3\u8bbe\u5907\u5931\u8d25&#8221;); return -1; }&lt;\/errno.h&gt;&lt;\/fcntl.h&gt;&lt;\/unistd.h&gt; \u767b\u5f55\u540e\u590d\u5236 \u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0copen()\u51fd\u6570\u901a\u8fc7\u4f20\u5165\u4e32\u53e3\u8bbe\u5907\u8def\u5f84\/dev\/ttyS0\u4ee5\u53ca\u4e00\u4e9b\u6807\u5fd7\u6765\u6253\u5f00\u4e32\u53e3\u8bbe\u5907\u3002O_RDWR\u8868\u793a\u4ee5\u53ef\u8bfb\u5199\u7684\u65b9\u5f0f\u6253\u5f00\u8bbe\u5907\uff0cO_NOCTTY\u8868\u793a\u4e0d\u5c06\u6253\u5f00\u7684\u4e32\u53e3\u4f5c\u4e3a\u63a7\u5236\u7ec8\u7aef\uff0cO_NONBLOCK\u8868\u793a\u4ee5\u975e\u963b\u585e\u7684\u65b9\u5f0f\u6253\u5f00\u8bbe\u5907\u3002\u6253\u5f00\u6210\u529f\u540e\uff0c\u4f1a\u8fd4\u56de\u4e00\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26fd\u4f9b\u540e\u7eed\u4f7f\u7528\u3002 \u56db\u3001\u8bbe\u7f6e\u4e32\u53e3\u53c2\u6570 \u5728\u6253\u5f00\u4e32\u53e3\u8bbe\u5907\u540e\uff0c\u6211\u4eec\u9700\u8981\u4f7f\u7528tcgetattr()\u51fd\u6570\u83b7\u53d6\u4e32\u53e3\u7684\u539f\u59cb\u53c2\u6570\uff0c\u7136\u540e\u901a\u8fc7\u4fee\u6539\u8fd9\u4e9b\u53c2\u6570\u6765\u8fdb\u884c\u4e32\u53e3\u53c2\u6570\u7684\u914d\u7f6e\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u4ee3\u7801\u793a\u4f8b\uff1a #include&lt;termios.h&gt; struct termios options; tcgetattr(fd, 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