{"id":94778,"date":"2024-04-29T07:10:10","date_gmt":"2024-04-28T23:10:10","guid":{"rendered":"http:\/\/lrxjmw.cn\/?p=94778"},"modified":"2024-04-29T07:10:10","modified_gmt":"2024-04-28T23:10:10","slug":"analysis-linux-patron","status":"publish","type":"post","link":"https:\/\/lrxjmw.cn\/analysis-linux-patron.html","title":{"rendered":"\u5256\u6790Linux\u7684\u5b88\u62a4\u795e"},"content":{"rendered":"<div   id="j6sjwn9j3u"    style=\"margin-top: 2em; margin-bottom: 1em;\"><span style=\"color: #1e1e1e; letter-spacing: 2px; border-left: #FF3030 3px solid; border-right: #FF3030 3px solid; padding-left: 8px; padding-right: 8px; font-size: 12pt;\"><strong>\u540e\u53f0\u8fdb\u7a0b\u4e0e\u5b88\u62a4\u8fdb\u7a0b\u7684\u533a\u522b<\/strong><\/span><\/div>\n<ul>\u6700\u5927\u7684\u533a\u522b\u6709\u4ee5\u4e0b\u51e0\u70b9\uff1a<\/p>\n<li>(a)\u5b88\u62a4\u8fdb\u7a0b\u5df2\u7ecf\u5b8c\u5168\u8131\u79bb\u7ec8\u7aef\u63a7\u5236\u53f0\u4e86\uff0c\u800c\u540e\u53f0\u7a0b\u5e8f\u5e76\u672a\u5b8c\u5168\u8131\u79bb\u7ec8\u7aef(\u5728\u7ec8\u7aef\u672a\u5173\u95ed\u524d\u8fd8\u662f\u4f1a\u5f80\u7ec8\u7aef\u8f93\u51fa\u7ed3\u679c);<\/li>\n<li>(b)\u5b88\u62a4\u8fdb\u7a0b\u5728\u5173\u95ed\u7ec8\u7aef\u63a7\u5236\u53f0\u65f6\u4e0d\u4f1a\u53d7\u5f71\u54cd\uff0c\u800c\u540e\u53f0\u7a0b\u5e8f\u4f1a\u968f\u7528\u6237\u9000\u51fa\u800c\u505c\u6b62\uff0c\u9700\u8981\u5728\u4ee5nohup command &amp; \u683c\u5f0f\u8fd0\u884c\u624d\u80fd\u907f\u514d\u5f71\u54cd;<\/li>\n<li>(c)\u5b88\u62a4\u8fdb\u7a0b\u7684\u4f1a\u8bdd\u7ec4\u548c\u5f53\u524d\u76ee\u5f55\uff0c\u6587\u4ef6\u63cf\u8ff0\u7b26\u90fd\u662f\u72ec\u7acb\u7684\u3002\u540e\u53f0\u8fd0\u884c\u53ea\u662f\u7ec8\u7aef\u8fdb\u884c\u4e86\u4e00\u6b21fork\uff0c\u8ba9\u7a0b\u5e8f\u5728\u540e\u53f0\u6267\u884c\uff0c\u8fd9\u4e9b\u90fd\u6ca1\u6539\u53d8;<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-94785\" src=\"http:\/\/lrxjmw.cn\/wp-content\/uploads\/2018\/02\/u11213445301849354953fm27gp0.jpg\" alt=\"\" width=\"442\" height=\"300\" srcset=\"https:\/\/lrxjmw.cn\/wp-content\/uploads\/2018\/02\/u11213445301849354953fm27gp0.jpg 442w, https:\/\/lrxjmw.cn\/wp-content\/uploads\/2018\/02\/u11213445301849354953fm27gp0-300x204.jpg 300w\" sizes=\"auto, (max-width: 442px) 100vw, 442px\" \/><\/p>\n<div   id="j6sjwn9j3u"    style=\"margin-top: 2em; margin-bottom: 1em;\"><span style=\"color: #1e1e1e; letter-spacing: 2px; border-left: #FF3030 3px solid; border-right: #FF3030 3px solid; padding-left: 8px; padding-right: 8px; font-size: 12pt;\"><strong>\u5b88\u62a4\u8fdb\u7a0b\u7684\u7279\u70b9<\/strong><\/span><\/div>\n<p>\u5b88\u62a4\u8fdb\u7a0b(Daemon)\u662f\u5728\u540e\u53f0\u8fd0\u884c\u7684\u4e00\u79cd\u7279\u6b8a\u8fdb\u7a0b\uff0c\u5b83\u8131\u79bb\u4e8e\u7ec8\u7aef\uff0c\u4ece\u800c\u8fd9\u53ef\u907f\u514d\u8fdb\u7a0b\u88ab\u4efb\u4f55\u7ec8\u7aef\u6240\u4ea7\u751f\u7684\u4fe1\u53f7\u6253\u65ad\uff0c\u5b83\u5728\u6267\u884c\u8fdb\u7a0b\u4e2d\u7684\u4ea7\u751f\u4fe1\u606f\u4e5f\u4e0d\u5728\u4efb\u4f55\u7ec8\u7aef\u4e0a\u663e\u793a\u3002\u5b88\u62a4\u8fdb\u7a0b\u5468\u671f\u6027\u5730\u6267\u884c\u67d0\u79cd\u4efb\u52a1\u6216\u7b49\u5f85\u5904\u7406\u67d0\u4e9b\u53d1\u751f\u7684\u4e8b\u4ef6\uff0cLinux\u7684\u5927\u591a\u6570\u670d\u52a1\u5668\u5c31\u662f\u7528\u5b88\u62a4\u8fdb\u7a0b\u5b9e\u73b0\u7684\u3002<\/p>\n<div   id="j6sjwn9j3u"    style=\"margin-top: 2em; margin-bottom: 1em;\"><span style=\"color: #1e1e1e; letter-spacing: 2px; border-left: #FF3030 3px solid; border-right: #FF3030 3px solid; padding-left: 8px; padding-right: 8px; font-size: 12pt;\"><strong>\u5b88\u62a4\u8fdb\u7a0b\u7f16\u7a0b\u8981\u70b9<\/strong><\/span><\/div>\n<ol>\n<li style=\"list-style-type: none\">\n<ol>\n<li>\u5c4f\u853d\u4e00\u4e9b\u6709\u5173\u63a7\u5236\u7ec8\u7aef\u64cd\u4f5c\u7684\u4fe1\u53f7\uff0c\u662f\u4e3a\u4e86\u9632\u6b62\u5728\u5b88\u62a4\u8fdb\u7a0b\u6ca1\u6709\u6b63\u5e38\u542f\u52a8\u8d77\u6765\u524d\uff0c\u63a7\u5236\u7ec8\u7aef\u53d7\u5230\u5e72\u6270\u9000\u51fa\u6216\u6302\u8d77\u3002\u4ee3\u7801\u5982\u4e0b\uff1a\n<pre>\/* \u5904\u7406\u53ef\u80fd\u7684\u7ec8\u7aef\u4fe1\u53f7 *\/\r\nsignal(SIGTTOU, SIG_IGN);\r\nsignal(SIGTTIN, SIG_IGN);\r\nsignal(SIGTSTP, SIG_IGN);\r\nsignal(SIGHUP , SIG_IGN);\r\n<\/pre>\n<\/li>\n<li>\u5728\u540e\u53f0\u8fd0\u884c\u3002\n<pre>\/* \u662f\u7236\u8fdb\u7a0b\uff0c\u7ed3\u675f\u7236\u8fdb\u7a0b\uff0c\u5b50\u8fdb\u7a0b\u7ee7\u7eed *\/\r\nif(fork())\r\n    exit(0);\r\n<\/pre>\n<\/li>\n<li>\u8131\u79bb\u63a7\u5236\u7ec8\u7aef\u548c\u8fdb\u7a0b\u7ec4\uff1a\n<ul>\n<li>(1)\u4e00\u4e2a\u8fdb\u7a0b\u5c5e\u4e8e\u4e00\u4e2a\u8fdb\u7a0b\u7ec4\uff0c\u8fdb\u7a0b\u7ec4\u53f7(PGID)\u5c31\u662f\u8fdb\u7a0b\u7ec4\u957f\u7684\u8fdb\u7a0b\u53f7(PID)<\/li>\n<li>(2)\u540c\u8fdb\u7a0b\u7ec4\u4e2d\u7684\u8fdb\u7a0b\u5171\u4eab\u4e00\u4e2a\u63a7\u5236\u7ec8\u7aef\uff0c\u8fd9\u4e2a\u63a7\u5236\u7ec8\u7aef\u9ed8\u8ba4\u662f\u521b\u5efa\u8fdb\u7a0b\u7684\u7ec8\u7aef<\/li>\n<li>(3)\u4e00\u4e2a\u8fdb\u7a0b\u5173\u8054\u7684\u63a7\u5236\u7ec8\u7aef\u548c\u8fdb\u7a0b\u7ec4\u901a\u5e38\u662f\u4ece\u7236\u8fdb\u7a0b\u7ee7\u627f\u4e0b\u6765\u7684\uff0c\u56e0\u6b64\uff0c\u8fd9\u4e2a\u5b50\u8fdb\u7a0b\u4ecd\u7136\u53d7\u5230\u7236\u4eb2\u8fdb\u7a0b\u7ec8\u7aef\u7684\u5f71\u54cd\uff0c\u56e0\u4e3a\u7ec8\u7aef\u4ea7\u751f\u7684\u4fe1\u53f7\u4f1a\u53d1\u9001\u7ed9\u524d\u53f0\u8fdb\u7a0b\u7ec4\u7684\u6240\u6709\u8fdb\u7a0b\u3002<\/li>\n<\/ul>\n<p>\u57fa\u4e8e\u4ee5\u4e0a\u539f\u56e0\uff0c\u9700\u8981\u8ba9\u4e3a\u4e2a\u5b50\u8fdb\u7a0b\u5f7b\u5e95\u6446\u8131\u8be5\u7ec8\u7aef\u7684\u5f71\u54cd\uff0c\u9700\u8981\u8c03\u7528setsid()\u4f7f\u5b50\u8fdb\u7a0b\u6210\u4e3a\u65b0\u7684\u4f1a\u8bdd\u7ec4\u957f\uff0c\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<pre>setsid();<\/pre>\n<p>setsid()\u8c03\u7528\u6210\u529f\u540e\uff0c\u8c03\u7528\u6b64\u51fd\u6570\u7684\u8fdb\u7a0b\u6210\u4e3a\u65b0\u7684\u4f1a\u8bdd\u7ec4\u957f\u548c\u65b0\u7684\u8fdb\u7a0b\u7ec4\u957f\uff0c\u5e76\u4e0e\u539f\u6765\u7684\u8fdb\u7a0b\u7ec4\u8131\u79bb\u5173\u7cfb\u3002\u7531\u4e8e\u4f1a\u8bdd\u8fc7\u7a0b\u5bf9\u63a7\u5236\u7ec8\u7aef\u7684\u72ec\u5360\u6027\uff0c\u8fdb\u7a0b\u540c\u65f6\u4e0e\u63a7\u5236\u7ec8\u7aef\u8131\u79bb\u3002<\/li>\n<li>\u7981\u6b62\u8fdb\u7a0b\u91cd\u65b0\u6253\u5f00\u63a7\u5236\u7ec8\u7aef\uff0c\u91c7\u7528\u7684\u529e\u6cd5\u662f\u518d\u6b21\u521b\u5efa\u4e00\u4e2a\u5b50\u8fdb\u7a0b\uff0c\u5e76\u8ba9\u7236\u4eb2\u8fdb\u7a0b\u9000\u51fa\uff0c\u8be5\u5b50\u8fdb\u7a0b\u4e0d\u518d\u662f\u4f1a\u8bdd\u7ec4\u957f\uff0c\u4ece\u800c\u8fbe\u5230\u76ee\u7684\u3002\u4ee3\u7801\u5982\u4e0b\uff1a\n<pre>\/* \u7ed3\u675f\u7b2c\u4e00\u5b50\u8fdb\u7a0b\uff0c\u7b2c\u4e8c\u5b50\u8fdb\u7a0b\u7ee7\u7eed *\/\r\nif(fork())\r\n    exit(0);\r\n<\/pre>\n<\/li>\n<li>\u5173\u95ed\u6253\u5f00\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u3002\u56e0\u4e3a\u8fdb\u7a0b\u4ece\u521b\u5efa\u5b83\u7684\u7236\u8fdb\u7a0b\u90a3\u91cc\u7ee7\u627f\u4e86\u6253\u5f00\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\uff0c\u4e00\u822c\u60c5\u51b5\u4e0b\u4e0d\u518d\u9700\u8981\u3002\u5982\u4e0d\u5173\u95ed\uff0c\u5c06\u4f1a\u6d6a\u8d39\u7cfb\u7edf\u8d44\u6e90\u3002\u4ee3\u7801\u5982\u4e0b\uff1a\n<pre>#define NOFILE  256\r\n\r\nfor(i=0; i<\/pre>\n<p>&nbsp;<\/li>\n<li>\u6539\u53d8\u5f53\u524d\u5de5\u4f5c\u76ee\u5f55\u3002\u8fdb\u7a0b\u6d3b\u52a8\u65f6\uff0c\u5176\u5de5\u4f5c\u76ee\u5f55\u6240\u5728\u7684\u6587\u4ef6\u7cfb\u7edf\u4e0d\u80fd\u5378\u8f7d\u3002\u56e0\u6b64\u9700\u8981\u5c06\u5b88\u62a4\u8fdb\u7a0b\u7684\u5de5\u4f5c\u76ee\u5f55\u6539\u53d8\u5230\u5408\u9002\u7684\u76ee\u5f55\u3002\u4ee3\u7801\u5982\u4e0b\uff1a\n<pre>chdir(\"\/tmp\");<\/pre>\n<\/li>\n<li>\u91cd\u8bbe\u6587\u4ef6\u521b\u5efa\u63a9\u7801\u3002\u8fdb\u7a0b\u4ece\u521b\u5efa\u5b83\u7684\u7236\u8fdb\u7a0b\u90a3\u91cc\u7ee7\u627f\u4e86\u6587\u4ef6\u521b\u5efa\u63a9\u7801\u3002\u5b83\u53ef\u80fd\u4fee\u6539\u5b88\u62a4\u8fdb\u7a0b\u6240\u521b\u5efa\u7684\u6587\u4ef6\u7684\u5b58\u53d6\u6743\u9650\u3002\u4ee3\u7801\u5982\u4e0b\uff1a\n<pre>umask(0);\r\n<\/pre>\n<\/li>\n<li>\u5904\u7406SIGCHLD\u4fe1\u53f7(\u5b50\u8fdb\u7a0b\u9000\u51fa\u4fe1\u53f7)\u3002\u5982\u679c\u4e0d\u7b49\u5f85\u5b50\u8fdb\u7a0b\u7ed3\u675f\uff0c\u5b50\u8fdb\u7a0b\u5c06\u6210\u4e3a\u50f5\u5c38\u8fdb\u7a0b\u4ece\u800c\u5360\u7528\u7cfb\u7edf\u5185\u6838\u8d44\u6e90\u3002\n<pre>\/* \u5c06\u5b50\u8fdb\u7a0b\u9000\u51fa\u4fe1\u53f7\u8bbe\u4e3aSIG_IGN\uff0c\u8ba9\u7cfb\u7edf\u5e2e\u52a9\u56de\u6536\u8fdb\u7a0b\u8d44\u6e90 *\/\r\nsignal(SIGCHLD, SIG_IGN);<\/pre>\n<p>\u6574\u4f53\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<pre>#define NOFILE      256\r\n\r\nvoid DaemonMode()\r\n{\r\n    int num = 0;\r\n    int fd0, fd1, fd2;\r\n\r\n    \/* \u5c4f\u853d\u53ef\u80fd\u7684\u4fe1\u53f7 *\/\r\n    signal(SIGTTOU, SIG_IGN);\r\n    signal(SIGTTIN, SIG_IGN);\r\n    signal(SIGTSTP, SIG_IGN);\r\n    signal(SIGHUP , SIG_IGN);\r\n\r\n    if(fork())\r\n        exit(0);\r\n\r\n    setsid();\r\n\r\n    if(fork())\r\n        exit(0);\r\n\r\n    chdir(\"\/tmp\/httpd\");\r\n\r\n    umask(0);\r\n\r\n    for(; num<\/pre>\n<p>&nbsp;<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<div   id="j6sjwn9j3u"    style=\"margin-top: 2em; margin-bottom: 1em;\"><span style=\"color: #1e1e1e; letter-spacing: 2px; border-left: #FF3030 3px solid; border-right: #FF3030 3px solid; padding-left: 8px; padding-right: 8px; font-size: 12pt;\"><strong>\u8865\u5145 setsid() \u51fd\u6570\u529f\u80fd\uff1a<\/strong><\/span><\/div>\n<p>\u5982\u679c\u8c03\u7528\u8fdb\u7a0b\u5df2\u7ecf\u662f\u4e00\u4e2a\u8fdb\u7a0b\u7ec4\u7684\u7ec4\u957f\uff0c\u5219\u6b64\u51fd\u6570\u8fd4\u56de\u9519\u8bef\u3002\u4e3a\u4e86\u675c\u7edd\u8fd9\u79cd\u60c5\u51b5\uff0c\u901a\u5e38\u5148\u8c03\u7528fork()\u521b\u5efa\u5b50\u8fdb\u7a0b\uff0c\u7136\u540e\u4f7f\u5176\u7236\u8fdb\u7a0b\u7ec8\u6b62\uff0c\u800c\u5b50\u8fdb\u7a0b\u7ee7\u7eed\uff0c\u5728\u5b50\u8fdb\u7a0b\u4e2d\u8c03\u7528\u6b64\u51fd\u6570\u3002<\/p>\n<p>\u5982\u679c\u8c03\u7528\u6b64\u51fd\u6570\u7684\u8fdb\u7a0b\u4e0d\u662f\u4e00\u4e2a\u8fdb\u7a0b\u7ec4\u7ec4\u957f\uff0c\u5219\u6b64\u51fd\u6570\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u4f1a\u8bdd\uff0c\u8c03\u7528setsid()\u51fd\u6570\u7684\u8fdb\u7a0b\u6210\u4e3a\u65b0\u7684\u4f1a\u8bdd\u7684\u9886\u5934\u8fdb\u7a0b\uff0c\u5e76\u4e0e\u5176\u7236\u8fdb\u7a0b\u7684\u4f1a\u8bdd\u7ec4\u548c\u8fdb\u7a0b\u7ec4\u8131\u79bb\u3002\u7531\u4e8e\u4f1a\u8bdd\u5bf9\u63a7\u5236\u7ec8\u7aef\u7684\u72ec\u5360\u6027\uff0c\u8fdb\u7a0b\u540c\u65f6\u4e0e\u63a7\u5236\u7ec8\u7aef\u8131\u79bb\u3002<\/p>\n<blockquote>\n<p style=\"text-align: left; color: #88a6a4;\">\u539f\u6587\u6765\u81ea\uff1a<a href=\"http:\/\/www.linuxidc.com\/Linux\/2018-02\/150773.htm\" target=\"_blank\" rel=\"noopener\">http:\/\/www.linuxidc.com\/Linux\/2018-02\/150773.htm<\/a><\/p>\n<p style=\"text-align: left; color: #88a6a4;\">\u672c\u6587\u5730\u5740\uff1a<a href=\"http:\/\/lrxjmw.cn\/analysis-linux-patron.html\" target=\"_blank\" rel=\"noopener\">http:\/\/lrxjmw.cn\/analysis-linux-patron.html<\/a><span style=\"float: right;\">\u7f16\u8f91\uff1a\u82cf\u897f\u4e91\uff0c\u5ba1\u6838\u5458\uff1a\u9004\u589e\u5b9d<\/span><\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>\u540e\u53f0\u8fdb\u7a0b\u4e0e\u5b88\u62a4\u8fdb\u7a0b\u7684\u533a\u522b \u6700\u5927\u7684\u533a\u522b\u6709\u4ee5\u4e0b\u51e0\u70b9\uff1a (a)\u5b88\u62a4\u8fdb\u7a0b\u5df2\u7ecf\u5b8c\u5168\u8131\u79bb\u7ec8\u7aef\u63a7\u5236\u53f0\u4e86\uff0c\u800c\u540e\u53f0\u7a0b\u5e8f\u5e76\u672a\u5b8c\u5168\u8131 [&hellip;]<\/p>\n","protected":false},"author":63,"featured_media":94784,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[55],"tags":[],"class_list":["post-94778","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-thread"],"acf":[],"_links":{"self":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts\/94778","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/users\/63"}],"replies":[{"embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/comments?post=94778"}],"version-history":[{"count":7,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts\/94778\/revisions"}],"predecessor-version":[{"id":94817,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts\/94778\/revisions\/94817"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/media\/94784"}],"wp:attachment":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/media?parent=94778"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/categories?post=94778"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/tags?post=94778"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}