{"id":393,"date":"2014-03-10T21:06:31","date_gmt":"2014-03-10T13:06:31","guid":{"rendered":"http:\/\/wangkaixuan.tech\/?p=393"},"modified":"2020-06-06T21:07:47","modified_gmt":"2020-06-06T13:07:47","slug":"linux%e4%b8%8b%e7%9a%84%e5%86%85%e5%ad%98%e7%9b%91%e6%8e%a7%e5%b0%8f%e7%a8%8b%e5%ba%8f","status":"publish","type":"post","link":"http:\/\/www.wangkaixuan.tech\/?p=393","title":{"rendered":"Linux\u4e0b\u7684\u5185\u5b58\u76d1\u63a7\u5c0f\u7a0b\u5e8f"},"content":{"rendered":"\n<pre class=\"wp-block-code\"><code>#include&lt;stdio.h>\n#include&lt;unistd.h>\n\nlong getNum(char *str, int len)\n{\n\tlong tmp = 0;\n\tfor (int i = 0; i &lt; len; i++)\n\t{\n\t\ttmp = tmp * 10 + (str&#91;i] == ' ' ? 0 : (str&#91;i] - '0'));\n\t}\n\treturn tmp;\n}\n\nint main()\n{\n\n\twhile (1)\n\t{\n\t\tFILE *file = popen(\"cat \/proc\/meminfo\", \"r\");\n\t\tchar buf&#91;100];\n\t\tlong total = 0;\n\t\tlong avi = 0;\n\t\tchar str&#91;7];\n\t\tfgets(buf, 100, file);\n\t\tfor (int i = 17; i &lt; 24; i++)\n\t\t\tstr&#91;i - 17] = buf&#91;i];\n\t\ttotal = getNum(str, 7);\n\n\t\tfgets(buf, 100, file);\n\t\tfor (int i = 17; i &lt; 24; i++)\n\t\t\tstr&#91;i - 17] = buf&#91;i];\n\t\tavi = getNum(str, 7);\n\n\t\tprintf(\"Total: %ld MB  Aviliable: %ld MB  Used: %d MB\", total \/ 1000,\n\t\t\t\tavi \/ 1000, (total - avi) \/ 1000);\n\t\tputs(\"\");\n\n\t\t\/\/fputs (buf , stdout);\n\n\t\tsleep(1);\n\t\tpclose(file);\n\n\t}\n\treturn 0;\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[],"class_list":["post-393","post","type-post","status-publish","format-standard","hentry","category-06-03-play-ground"],"_links":{"self":[{"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=\/wp\/v2\/posts\/393","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=393"}],"version-history":[{"count":0,"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=\/wp\/v2\/posts\/393\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=393"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=393"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.wangkaixuan.tech\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=393"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}