{"id":43919,"date":"2025-06-16T07:15:53","date_gmt":"2025-06-15T23:15:53","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/43919.html"},"modified":"2025-06-16T07:15:53","modified_gmt":"2025-06-15T23:15:53","slug":"%e6%b0%b8%e4%b8%8d%e4%bc%91%e7%9c%a0%ef%bc%9alinux-%e5%ae%88%e6%8a%a4%e8%bf%9b%e7%a8%8b%e7%9a%84%e5%b7%a5%e4%bd%9c%e5%8e%9f%e7%90%86","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/43919.html","title":{"rendered":"\u6c38\u4e0d\u4f11\u7720\uff1aLinux \u5b88\u62a4\u8fdb\u7a0b\u7684\u5de5\u4f5c\u539f\u7406"},"content":{"rendered":"<h3>\u4e2a\u4eba\u4e3b\u9875&#xff1a;chian-ocean<\/h3>\n<h3>\u6587\u7ae0\u4e13\u680f-NET<\/h3>\n<\/p>\n<h4>\u6c38\u4e0d\u4f11\u7720&#xff1a;Linux \u5b88\u62a4\u8fdb\u7a0b\u7684\u5de5\u4f5c\u539f\u7406<\/h4>\n<ul>\n<li>\n<ul>\n<li>\u4e2a\u4eba\u4e3b\u9875&#xff1a;chian-ocean<\/li>\n<li>\u6587\u7ae0\u4e13\u680f-NET<\/li>\n<\/ul>\n<\/li>\n<li>\u524d\u8a00<\/li>\n<li>\u8fdb\u7a0b\u4fe1\u606f\u5b57\u6bb5\u542b\u4e49<\/li>\n<li>\n<ul>\n<li>\u8fdb\u7a0b\u7ec4ID&#xff08;&#096;PGID&#096;&#xff09;<\/li>\n<li>\u4f1a\u8bddID&#xff08;&#096;SID&#096;&#xff09;<\/li>\n<\/ul>\n<\/li>\n<li>\u524d\u540e\u53f0\u8fdb\u7a0b<\/li>\n<li>\n<ul>\n<li>\u5b9a\u4e49<\/li>\n<li>\n<ul>\n<li>\u540e\u53f0\u8fdb\u7a0b\u7684\u7279\u70b9<\/li>\n<\/ul>\n<\/li>\n<li>\u524d\u540e\u53f0\u8fdb\u7a0b\u7684\u64cd\u4f5c<\/li>\n<li>\n<ul>\n<li>&#096;jobs&#096;\u663e\u793a\u540e\u53f0\u4f5c\u4e1a<\/li>\n<li>&#096;fg&#096;\u5c06\u540e\u53f0\u4f5c\u4e1a\u5e26\u56de\u524d\u53f0<\/li>\n<li>&#096;bg&#096;\u5c06\u540e\u53f0\u4f5c\u4e1a\u5e26\u56de\u524d\u53f0<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>\u5b88\u62a4\u8fdb\u7a0b<\/li>\n<li>\n<ul>\n<li>\u5b88\u62a4\u8fdb\u7a0b\u7684\u7279\u70b9<\/li>\n<li>\u7f16\u5199\u5b88\u62a4\u8fdb\u7a0b<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>\u524d\u8a00<\/h2>\n<p>\u5728 Linux \u7cfb\u7edf\u4e2d&#xff0c;\u5b88\u62a4\u8fdb\u7a0b&#xff08;Daemon&#xff09;\u662f\u6307\u90a3\u4e9b\u5728\u540e\u53f0\u8fd0\u884c\u7684\u8fdb\u7a0b&#xff0c;\u901a\u5e38\u4e0d\u4e0e\u7528\u6237\u76f4\u63a5\u4ea4\u4e92&#xff0c;\u800c\u662f\u63d0\u4f9b\u67d0\u79cd\u670d\u52a1\u6216\u8005\u5b8c\u6210\u7cfb\u7edf\u4efb\u52a1\u3002\u5b88\u62a4\u8fdb\u7a0b\u901a\u5e38\u5728\u7cfb\u7edf\u542f\u52a8\u65f6\u542f\u52a8&#xff0c;\u5e76\u5728\u7cfb\u7edf\u8fd0\u884c\u65f6\u6301\u7eed\u5b58\u5728\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250615231548-684f5424cf6e0.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<h2>\u8fdb\u7a0b\u4fe1\u606f\u5b57\u6bb5\u542b\u4e49<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250615231549-684f54253e1f3.png\" alt=\"image-20250613220101763\" \/><\/p>\n<table>\n<tr>\u5b57\u6bb5\u542b\u4e49\u7528\u9014\u793a\u4f8b<\/tr>\n<tbody>\n<tr>\n<td>PPID<\/td>\n<td>\u7236\u8fdb\u7a0b ID<\/td>\n<td>\u8868\u793a\u5f53\u524d\u8fdb\u7a0b\u7684\u7236\u8fdb\u7a0b\u7684\u8fdb\u7a0b ID\u3002\u5e2e\u52a9\u8ffd\u8e2a\u8fdb\u7a0b\u7684\u7236\u5b50\u5173\u7cfb\u3002<\/td>\n<td>23449<\/td>\n<\/tr>\n<tr>\n<td>PID<\/td>\n<td>\u8fdb\u7a0b ID<\/td>\n<td>\u552f\u4e00\u6807\u8bc6\u5f53\u524d\u8fdb\u7a0b\u3002\u901a\u8fc7 PID \u53ef\u4ee5\u7ba1\u7406\u8fdb\u7a0b\u3002<\/td>\n<td>24284<\/td>\n<\/tr>\n<tr>\n<td>PGID<\/td>\n<td>\u8fdb\u7a0b\u7ec4 ID<\/td>\n<td>\u6807\u8bc6\u5f53\u524d\u8fdb\u7a0b\u6240\u5728\u7684\u8fdb\u7a0b\u7ec4\u3002\u7528\u4e8e\u7ba1\u7406\u76f8\u5173\u8fdb\u7a0b\u3002<\/td>\n<td>24284<\/td>\n<\/tr>\n<tr>\n<td>SID<\/td>\n<td>\u4f1a\u8bdd ID<\/td>\n<td>\u6807\u8bc6\u5f53\u524d\u8fdb\u7a0b\u6240\u5c5e\u7684\u4f1a\u8bdd ID\u3002\u4f1a\u8bdd\u662f\u5171\u4eab\u540c\u4e00\u4e2a\u63a7\u5236\u7ec8\u7aef\u7684\u8fdb\u7a0b\u96c6\u5408\u3002<\/td>\n<td>23449<\/td>\n<\/tr>\n<tr>\n<td>TTY<\/td>\n<td>\u7ec8\u7aef\u7c7b\u578b<\/td>\n<td>\u6307\u5f53\u524d\u8fdb\u7a0b\u6240\u4f7f\u7528\u7684\u7ec8\u7aef\u8bbe\u5907\u3002<\/td>\n<td>pts\/0<\/td>\n<\/tr>\n<tr>\n<td>TPGID<\/td>\n<td>\u63a7\u5236\u7ec8\u7aef\u7684\u8fdb\u7a0b\u7ec4 ID<\/td>\n<td>\u6807\u8bc6\u8be5\u8fdb\u7a0b\u6240\u5c5e\u7684\u63a7\u5236\u7ec8\u7aef\u7684\u8fdb\u7a0b\u7ec4\u3002<\/td>\n<td>24284<\/td>\n<\/tr>\n<tr>\n<td>STAT<\/td>\n<td>\u8fdb\u7a0b\u72b6\u6001<\/td>\n<td>\u8868\u793a\u8fdb\u7a0b\u5f53\u524d\u7684\u72b6\u6001\u3002\u5e38\u89c1\u72b6\u6001\u5305\u62ec\u4f11\u7720\u3001\u8fd0\u884c\u3001\u505c\u6b62\u7b49\u3002<\/td>\n<td>S&#043;<\/td>\n<\/tr>\n<tr>\n<td>UID<\/td>\n<td>\u7528\u6237 ID<\/td>\n<td>\u8868\u793a\u5f53\u524d\u8fd0\u884c\u8be5\u8fdb\u7a0b\u7684\u7528\u6237\u7684\u6807\u8bc6\u7b26\u3002<\/td>\n<td>1000<\/td>\n<\/tr>\n<tr>\n<td>TIME<\/td>\n<td>\u8fdb\u7a0b\u5360\u7528\u7684 CPU \u65f6\u95f4<\/td>\n<td>\u663e\u793a\u8be5\u8fdb\u7a0b\u4f7f\u7528\u7684 CPU \u65f6\u95f4&#xff0c;\u683c\u5f0f\u4e3a\u201c\u5206\u949f:\u79d2\u201d\u3002<\/td>\n<td>0:00<\/td>\n<\/tr>\n<tr>\n<td>COMMAND<\/td>\n<td>\u6267\u884c\u7684\u547d\u4ee4<\/td>\n<td>\u663e\u793a\u5f53\u524d\u8fdb\u7a0b\u6b63\u5728\u6267\u884c\u7684\u547d\u4ee4\u6216\u7a0b\u5e8f\u3002<\/td>\n<td>sleep 100<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u8fdb\u7a0b\u7ec4ID&#xff08;PGID&#xff09;<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250615231549-684f542554026.png\" alt=\"image-20250613220115253\" \/><\/p>\n<ul>\n<li>\n<p>PGID&#xff08;\u8fdb\u7a0b\u7ec4 ID&#xff09; \u8868\u793a\u8fdb\u7a0b\u6240\u5728\u7684\u8fdb\u7a0b\u7ec4\u7684\u6807\u8bc6\u7b26\u3002\u5728\u8be5\u8f93\u51fa\u4e2d&#xff0c;\u6240\u6709\u8fdb\u7a0b\u7684 PGID \u90fd\u662f 25091&#xff0c;\u8bf4\u660e\u8fd9\u4e9b\u8fdb\u7a0b\u90fd\u5c5e\u4e8e\u540c\u4e00\u4e2a\u8fdb\u7a0b\u7ec4\u3002<\/p>\n<\/li>\n<li>\n<p>\u8fd9\u4e2a\u8fdb\u7a0b\u7ec4\u7684 leader&#xff08;\u8fdb\u7a0b\u7ec4\u957f&#xff09; \u662f PID 25091&#xff08;\u5b83\u7684 PGID \u503c\u662f\u5b83\u81ea\u5df1\u7684 PID&#xff09;&#xff0c;\u4e5f\u5c31\u662f\u8bf4&#xff0c;\u8fd9\u4e2a\u8fdb\u7a0b&#xff08;PID 25091&#xff09;\u662f\u8be5\u8fdb\u7a0b\u7ec4\u7684\u9886\u5bfc\u8005\u3002\u8be5\u8fdb\u7a0b\u7ec4\u4e2d\u7684\u5176\u4ed6\u8fdb\u7a0b&#xff08;\u4f8b\u5982 PID 25092\u300125093&#xff09;\u90fd\u662f\u7531\u8be5\u8fdb\u7a0b\u521b\u5efa\u7684&#xff0c;\u5b83\u4eec\u4e0e\u8fdb\u7a0b\u7ec4\u5171\u4eab\u540c\u4e00\u4e2a PGID\u3002<\/p>\n<\/li>\n<\/ul>\n<p>\u4e3a\u4ec0\u4e48 PGID \u76f8\u540c?<\/p>\n<ul>\n<li>\u8fdb\u7a0b\u7ec4\u662f\u4e00\u4e2a\u5c06\u591a\u4e2a\u76f8\u5173\u8fdb\u7a0b\u7ec4\u7ec7\u5728\u4e00\u8d77\u7684\u673a\u5236\u3002\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d&#xff0c;sleep 100 \u8fdb\u7a0b\u7684\u591a\u4e2a\u5b9e\u4f8b&#xff08;PID 25091\u300125092\u300125093&#xff09;\u90fd\u5c5e\u4e8e\u540c\u4e00\u4e2a\u8fdb\u7a0b\u7ec4&#xff0c;\u5b83\u4eec\u7684 PGID \u662f\u76f8\u540c\u7684\u3002<\/li>\n<li>\u8fd9\u79cd\u8bbe\u8ba1\u5141\u8bb8\u64cd\u4f5c\u7cfb\u7edf\u540c\u65f6\u7ba1\u7406\u591a\u4e2a\u8fdb\u7a0b&#xff0c;\u6bd4\u5982\u5411\u6574\u4e2a\u8fdb\u7a0b\u7ec4\u53d1\u9001\u4fe1\u53f7&#xff0c;\u8fdb\u884c\u8fdb\u7a0b\u7ec4\u63a7\u5236\u7b49\u3002<\/li>\n<\/ul>\n<h3>\u4f1a\u8bddID&#xff08;SID&#xff09;<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250615231549-684f5425747c4.png\" alt=\"image-20250613220119253\" \/><\/p>\n<ul>\n<li>\u5728\u8fd9\u91cc\u9762\u6211\u4eec\u521b\u5efa\u4e86\u4e09\u4e2a\u4f1a\u8bdd&#xff0c;SID \u5206\u522b\u4e3a 22449\u300122403\u300125410\u5206\u522b\u63a7\u5236\u7740\u4e0d\u540c\u7684\u7ec8\u7aef&#xff08; TTY&#xff09;<\/li>\n<\/ul>\n<p>\u5728\u6b64\u4f1a\u8bdd\u4e2d\u6211\u4eec\u6267\u884c<\/p>\n<p><span class=\"token function\">sleep<\/span> <span class=\"token number\">100<\/span> <span class=\"token operator\">|<\/span> <span class=\"token function\">sleep<\/span> <span class=\"token number\">100<\/span> <span class=\"token operator\">|<\/span> <span class=\"token function\">sleep<\/span> <span class=\"token number\">100<\/span> <\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250615231549-684f5425b1828.png\" alt=\"image-20250613220122467\" \/><\/p>\n<p>\u89c2\u5bdf\u8fdb\u7a0b sleep \u7684 SID &#061; 24003&#xff1a;<\/p>\n<ul>\n<li>\u6240\u6709\u663e\u793a\u7684 sleep \u8fdb\u7a0b\u7684 SID \u90fd\u662f 24003\u3002\u8fd9\u8868\u660e\u6240\u6709\u8fd9\u4e9b sleep \u8fdb\u7a0b\u5c5e\u4e8e\u540c\u4e00\u4e2a\u4f1a\u8bdd&#xff0c;\u5373\u5b83\u4eec\u5171\u4eab\u76f8\u540c\u7684\u4f1a\u8bdd ID\u3002<\/li>\n<li>SID \u8868\u793a\u8fd9\u4e9b\u8fdb\u7a0b\u662f\u540c\u4e00\u4e2a\u4f1a\u8bdd\u4e2d\u7684\u8fdb\u7a0b&#xff0c;\u4f1a\u8bdd\u4e2d\u7684\u6240\u6709\u8fdb\u7a0b\u90fd\u5177\u6709\u76f8\u540c\u7684 SID\u3002<\/li>\n<\/ul>\n<p>bash : \u4f1a\u8bdd\u7684\u9886\u5bfc\u8005&#xff1a;<\/p>\n<ul>\n<li>\u4f1a\u8bdd\u7684 SID \u901a\u5e38\u7b49\u4e8e\u4f1a\u8bdd\u7684 leader&#xff08;\u4f1a\u8bdd\u9886\u5bfc\u8fdb\u7a0b&#xff09;\u7684 PID\u3002\u56e0\u6b64&#xff0c;SID &#061; 24003 \u8868\u660e\u4f1a\u8bdd\u4e2d\u7684\u9886\u5bfc\u8fdb\u7a0b\u7684 PID \u662f 24003\u3002\u8fd9\u4e2a\u8fdb\u7a0b\u7684 PID \u4f1a\u4f5c\u4e3a\u4f1a\u8bdd\u7684 SID\u3002<\/li>\n<li>\u8fd9\u4e9b sleep \u8fdb\u7a0b\u7684 SID \u4e3a 24003&#xff0c;\u8868\u660e\u5b83\u4eec\u662f\u7531 PID &#061; 24003 \u542f\u52a8\u7684\u8fdb\u7a0b\u6240\u521b\u5efa&#xff0c;\u5e76\u4e14\u5b83\u4eec\u5171\u4eab\u8be5\u4f1a\u8bdd\u3002<\/li>\n<\/ul>\n<h2>\u524d\u540e\u53f0\u8fdb\u7a0b<\/h2>\n<h3>\u5b9a\u4e49<\/h3>\n<ul>\n<li>\u524d\u53f0\u8fdb\u7a0b \u662f\u90a3\u4e9b\u76f4\u63a5\u4e0e\u7528\u6237\u4ea4\u4e92\u5e76\u5360\u7528\u5f53\u524d\u7ec8\u7aef\u7684\u8fdb\u7a0b&#xff0c;\u901a\u5e38\u5b83\u4eec\u4f1a\u63a5\u6536\u7528\u6237\u8f93\u5165\u5e76\u663e\u793a\u8f93\u51fa\u3002<\/li>\n<\/ul>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;iostream&gt;<\/span>                                                                     <\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;unistd.h&gt;<\/span>    <\/span><\/p>\n<p><span class=\"token keyword\">using<\/span> <span class=\"token keyword\">namespace<\/span> std<span class=\"token punctuation\">;<\/span>    <\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">while<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;hello proc &#034;<\/span><span class=\"token operator\">&lt;&lt;<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">sleep<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<ul>\n<li>\u6267\u884c\u4ee3\u7801\u5728\u524d\u53f0\u8fdb\u7a0b&#xff0c;\u6267\u884c\u6307\u4ee4&#xff08;.\/\u6587\u4ef6\u540d&#xff09;&#xff1a;<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250615231550-684f542622cca.png\" alt=\"image-20250613220127778\" \/><\/p>\n<ul>\n<li>\n<p>\u540e\u53f0\u8fdb\u7a0b \u5219\u662f\u5728\u540e\u53f0\u8fd0\u884c\u7684\u8fdb\u7a0b&#xff0c;\u5b83\u4eec\u4e0d\u76f4\u63a5\u4e0e\u7528\u6237\u4ea4\u4e92&#xff0c;\u4e0d\u5360\u7528\u7ec8\u7aef&#xff0c;\u901a\u5e38\u7528\u4e8e\u6267\u884c\u957f\u65f6\u95f4\u8fd0\u884c\u7684\u4efb\u52a1&#xff0c;\u5982\u5b88\u62a4\u8fdb\u7a0b\u6216\u5b9a\u65f6\u4efb\u52a1\u3002<\/p>\n<\/li>\n<li>\n<p>\u5982\u679c\u5728\u540e\u53f0\u8fdb\u7a0b\u7684\u6267\u884c\u7684\u6307\u4ee4\u5c31\u662f&#xff1a;<\/p>\n<\/li>\n<\/ul>\n<p>.\/\u6587\u4ef6\u540d <span class=\"token operator\">&amp;<\/span><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250615231550-684f5426e2e3f.png\" alt=\"image-20250613220132041\" \/><\/p>\n<h4>\u540e\u53f0\u8fdb\u7a0b\u7684\u7279\u70b9<\/h4>\n<ul>\n<li>\n<p>\u4e0d\u5360\u7528\u7ec8\u7aef&#xff1a;\u540e\u53f0\u8fdb\u7a0b\u4e0d\u4f1a\u5360\u7528\u5f53\u524d\u7684\u63a7\u5236\u7ec8\u7aef&#xff08;\u5373\u7528\u6237\u7684\u8f93\u5165\u8f93\u51fa\u8bbe\u5907&#xff09;\u3002\u5f53\u4f60\u5c06\u4e00\u4e2a\u8fdb\u7a0b\u653e\u5165\u540e\u53f0\u8fd0\u884c\u65f6&#xff0c;\u7ec8\u7aef\u4ecd\u7136\u53ef\u4ee5\u7528\u6765\u6267\u884c\u5176\u4ed6\u547d\u4ee4\u3002<\/p>\n<\/li>\n<li>\n<p>\u4e0d\u4e0e\u7528\u6237\u4ea4\u4e92&#xff1a;\u540e\u53f0\u8fdb\u7a0b\u4e0d\u76f4\u63a5\u4e0e\u7528\u6237\u4ea4\u4e92&#xff0c;\u56e0\u6b64\u5b83\u4e0d\u4f1a\u963b\u585e\u7ec8\u7aef\u7684\u4f7f\u7528\u3002\u4f8b\u5982&#xff0c;\u4f60\u53ef\u4ee5\u5728\u540e\u53f0\u8fd0\u884c\u4e00\u4e2a\u957f\u65f6\u95f4\u7684\u4e0b\u8f7d\u4efb\u52a1&#xff0c;\u800c\u7ee7\u7eed\u5728\u524d\u53f0\u6267\u884c\u5176\u4ed6\u4efb\u52a1&#xff08;\u5982\u7f16\u8f91\u6587\u4ef6\u3001\u67e5\u770b\u6587\u4ef6\u7b49&#xff09;\u3002<\/p>\n<\/li>\n<li>\n<p>\u5f02\u6b65\u6267\u884c&#xff1a;\u540e\u53f0\u8fdb\u7a0b\u901a\u5e38\u662f\u5f02\u6b65\u6267\u884c\u7684&#xff0c;\u5373\u5b83\u4eec\u72ec\u7acb\u4e8e\u5f53\u524d\u6b63\u5728\u8fd0\u884c\u7684\u8fdb\u7a0b\u6267\u884c&#xff0c;\u4e0d\u4f1a\u5e72\u6270\u524d\u53f0\u8fdb\u7a0b\u7684\u6267\u884c<\/p>\n<\/li>\n<\/ul>\n<h3>\u524d\u540e\u53f0\u8fdb\u7a0b\u7684\u64cd\u4f5c<\/h3>\n<h4>jobs\u663e\u793a\u540e\u53f0\u4f5c\u4e1a<\/h4>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250615231551-684f54276d871.png\" alt=\"image-20250613220135254\" \/><\/p>\n<ul>\n<li>\u5f53\u524d\u8bc1\u660e\u670911\u4e2a\u4efb\u52a1\u5728\u540c\u65f6\u8dd1\u3002<\/li>\n<\/ul>\n<h4>fg\u5c06\u540e\u53f0\u4f5c\u4e1a\u5e26\u56de\u524d\u53f0<\/h4>\n<p><span class=\"token function\">fg<\/span> -\u8fdb\u7a0b\u7f16\u53f7<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250615231551-684f54278ed7a.png\" alt=\"image-20250613220343590\" \/><\/p>\n<p>\u5206\u6790&#xff1a;<\/p>\n<ul>\n<li>\u540e\u53f0\u8fd0\u884c\u7a0b\u5e8f&#xff1a;\u6267\u884c\u4e86 .\/a.out &amp;&#xff0c;\u8be5\u547d\u4ee4\u5c06\u7a0b\u5e8f a.out \u5728\u540e\u53f0\u8fd0\u884c&#xff0c;\u5e76\u8fd4\u56de\u4e86\u8fdb\u7a0b\u53f7 [1] 27998&#xff0c;\u8868\u793a\u540e\u53f0\u7a0b\u5e8f\u6b63\u5728\u8fd0\u884c\u3002<\/li>\n<li>\u67e5\u770b\u8f93\u51fa&#xff1a;\u8f93\u5165\u4e86 hello proc&#xff0c;\u7ec8\u7aef\u591a\u6b21\u663e\u793a\u4e86\u8fd9\u4e2a\u5b57\u7b26\u4e32&#xff0c;\u53ef\u80fd\u662f a.out \u7a0b\u5e8f\u7684\u8f93\u51fa\u5185\u5bb9\u3002<\/li>\n<li>\u8c03\u5230\u524d\u53f0&#xff1a;\u4f7f\u7528 fg 1 \u5c06\u540e\u53f0\u8fd0\u884c\u7684\u7a0b\u5e8f&#xff08;\u4f5c\u4e1a\u53f7 1&#xff09;\u8c03\u5230\u524d\u53f0&#xff0c;\u4f7f\u5176\u5f00\u59cb\u5728\u524d\u53f0\u8fd0\u884c\u3002\u6b64\u65f6\u53ef\u4ee5\u770b\u5230\u7a0b\u5e8f\u8f93\u51fa\u6301\u7eed\u663e\u793a\u3002<\/li>\n<li>\u7ec8\u6b62\u7a0b\u5e8f&#xff1a;\u6309\u4e0b CTRL &#043; C&#xff08;\u4e2d\u65ad\u4fe1\u53f7&#xff09;&#xff0c;\u7ec8\u6b62\u4e86\u5728\u524d\u53f0\u8fd0\u884c\u7684\u7a0b\u5e8f\u3002<\/li>\n<\/ul>\n<h4>bg\u5c06\u540e\u53f0\u4f5c\u4e1a\u5e26\u56de\u524d\u53f0<\/h4>\n<p><span class=\"token function\">bg<\/span> -\u8fdb\u7a0b\u7f16\u53f7<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/06\/20250615231551-684f5427d69af.png\" alt=\"image-20250613220347268\" \/><\/p>\n<p>\u5206\u6790&#xff1a;<\/p>\n<ul>\n<li>\n<p>.\/a.out&#xff1a;\u6267\u884c\u8fd9\u4e2a\u547d\u4ee4\u6765\u8fd0\u884c\u5df2\u7f16\u8bd1\u7684\u7a0b\u5e8f a.out\u3002\u7a0b\u5e8f\u6253\u5370\u4e86\u4e09\u6b21 hello proc \u5230\u7ec8\u7aef\u3002<\/p>\n<\/li>\n<li>\n<p>^Z&#xff1a;\u8fd9\u662f\u4e00\u4e2a\u952e\u76d8\u5feb\u6377\u952e&#xff0c;\u7528\u6765\u6682\u505c&#xff08;\u505c\u6b62&#xff09;\u6b63\u5728\u8fd0\u884c\u7684\u7a0b\u5e8f\u3002\u7a0b\u5e8f\u88ab\u6302\u8d77&#xff0c;\u5e76\u663e\u793a\u6d88\u606f [1]&#043; Stopped&#xff0c;\u8868\u793a\u8be5\u8fdb\u7a0b\u5df2\u6682\u505c\u3002<\/p>\n<\/li>\n<li>\n<p>bg 1&#xff1a;bg \u547d\u4ee4\u7528\u4e8e\u5c06\u505c\u6b62\u7684\u8fdb\u7a0b&#xff08;\u6b64\u5904\u4e3a\u4f5c\u4e1a\u53f7 1&#xff09;\u6062\u590d\u5230\u540e\u53f0\u7ee7\u7eed\u8fd0\u884c\u3002\u8fd9\u6837\u7a0b\u5e8f\u5c31\u53ef\u4ee5\u7ee7\u7eed\u6267\u884c&#xff0c;\u800c\u4e0d\u4f1a\u5360\u7528\u7ec8\u7aef\u3002<\/p>\n<\/li>\n<li>\n<p>.\/a.out &amp;&#xff1a;\u7a0b\u5e8f\u73b0\u5728\u5728\u540e\u53f0\u8fd0\u884c&#xff0c;\u8f93\u51fa\u7ee7\u7eed\u663e\u793a hello proc\u3002<\/p>\n<\/li>\n<\/ul>\n<h2>\u5b88\u62a4\u8fdb\u7a0b<\/h2>\n<p>\u5b88\u62a4\u8fdb\u7a0b&#xff08;Daemon&#xff09;\u662f\u8ba1\u7b97\u673a\u4e2d\u5728\u540e\u53f0\u8fd0\u884c\u7684\u4e00\u4e2a\u957f\u671f\u5b58\u5728\u7684\u8fdb\u7a0b&#xff0c;\u901a\u5e38\u5728\u64cd\u4f5c\u7cfb\u7edf\u542f\u52a8\u65f6\u81ea\u52a8\u542f\u52a8&#xff0c;\u5e76\u5728\u7cfb\u7edf\u5173\u95ed\u65f6\u505c\u6b62\u3002\u5b83\u4e0d\u4e0e\u7528\u6237\u76f4\u63a5\u4ea4\u4e92&#xff0c;\u800c\u662f\u8d1f\u8d23\u6267\u884c\u4e00\u4e9b\u540e\u53f0\u4efb\u52a1&#xff0c;\u5982\u5b9a\u65f6\u4efb\u52a1\u3001\u7cfb\u7edf\u76d1\u63a7\u3001\u670d\u52a1\u63d0\u4f9b\u7b49\u3002<\/p>\n<h3>\u5b88\u62a4\u8fdb\u7a0b\u7684\u7279\u70b9<\/h3>\n<li>\u540e\u53f0\u8fd0\u884c&#xff1a;\u5b88\u62a4\u8fdb\u7a0b\u4e0d\u4e0e\u7ec8\u7aef\u76f4\u63a5\u4ea4\u4e92&#xff0c;\u5b83\u4eec\u5728\u540e\u53f0\u8fd0\u884c&#xff0c;\u5e76\u4e14\u4e0d\u4f1a\u56e0\u7528\u6237\u767b\u51fa\u800c\u7ec8\u6b62\u3002\u3001<\/li>\n<li>\u81ea\u542f\u52a8\u548c\u957f\u671f\u8fd0\u884c&#xff1a;\u5927\u591a\u6570\u5b88\u62a4\u8fdb\u7a0b\u5728\u7cfb\u7edf\u542f\u52a8\u65f6\u81ea\u52a8\u542f\u52a8&#xff0c;\u5e76\u4e14\u901a\u5e38\u4f1a\u4e00\u76f4\u8fd0\u884c\u76f4\u5230\u7cfb\u7edf\u5173\u95ed\u6216\u5b88\u62a4\u8fdb\u7a0b\u88ab\u624b\u52a8\u505c\u6b62\u3002<\/li>\n<li>\u4e0e\u7ec8\u7aef\u5206\u79bb&#xff1a;\u5b88\u62a4\u8fdb\u7a0b\u901a\u5e38\u4f1a\u4e0e\u7ec8\u7aef\u6216\u63a7\u5236\u53f0\u5206\u79bb&#xff0c;\u8fd9\u610f\u5473\u7740\u5b83\u4eec\u4e0d\u4f9d\u8d56\u4e8e\u4efb\u4f55\u7ec8\u7aef\u4f1a\u8bdd&#xff0c;\u751a\u81f3\u5728\u7528\u6237\u9000\u51fa\u767b\u5f55\u540e\u4e5f\u4f1a\u7ee7\u7eed\u8fd0\u884c\u3002<\/li>\n<h3>\u7f16\u5199\u5b88\u62a4\u8fdb\u7a0b<\/h3>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">pragma<\/span> <span class=\"token expression\">once  <\/span><span class=\"token comment\">\/\/ \u9632\u6b62\u8be5\u5934\u6587\u4ef6\u88ab\u591a\u6b21\u5305\u542b<\/span><\/span><\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;iostream&gt;<\/span>      <span class=\"token comment\">\/\/ \u5f15\u5165\u8f93\u5165\u8f93\u51fa\u6d41\u5e93<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;unistd.h&gt;<\/span>      <span class=\"token comment\">\/\/ \u5f15\u5165Unix\u6807\u51c6\u51fd\u6570\u5e93&#xff08;\u6bd4\u5982fork, setsid\u7b49&#xff09;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;string&gt;<\/span>        <span class=\"token comment\">\/\/ \u5f15\u5165C&#043;&#043;\u6807\u51c6\u5b57\u7b26\u4e32\u5e93<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;signal.h&gt;<\/span>      <span class=\"token comment\">\/\/ \u5f15\u5165\u4fe1\u53f7\u5904\u7406\u5e93&#xff08;signal\u76f8\u5173\u51fd\u6570&#xff09;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;sys\/types.h&gt;<\/span>   <span class=\"token comment\">\/\/ \u5305\u542b\u7cfb\u7edf\u6570\u636e\u7c7b\u578b&#xff08;pid_t\u7b49&#xff09;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;sys\/stat.h&gt;<\/span>    <span class=\"token comment\">\/\/ \u5f15\u5165\u6587\u4ef6\u72b6\u6001\u548c\u6743\u9650\u5e93<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;fcntl.h&gt;<\/span>       <span class=\"token comment\">\/\/ \u5f15\u5165\u6587\u4ef6\u63a7\u5236\u5e93<\/span><\/span><\/p>\n<p><span class=\"token keyword\">const<\/span> std<span class=\"token double-colon punctuation\">::<\/span>string nullfile <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;\/dev\/null&#034;<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5b9a\u4e49\u4e00\u4e2a\u5e38\u91cf nullfile&#xff0c;\u8868\u793a Unix \u7cfb\u7edf\u4e2d\u7684\u7a7a\u8bbe\u5907\u6587\u4ef6 \/dev\/null<\/span><\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">daemon<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> std<span class=\"token double-colon punctuation\">::<\/span>string chdir <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u5ffd\u7565\u4e00\u4e9b\u5e38\u89c1\u7684\u4fe1\u53f7<\/span><br \/>\n    <span class=\"token function\">signal<\/span><span class=\"token punctuation\">(<\/span>SIGCHLD<span class=\"token punctuation\">,<\/span> SIG_IGN<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5ffd\u7565\u5b50\u8fdb\u7a0b\u7ed3\u675f\u4fe1\u53f7&#xff08;\u4e0d\u9700\u8981\u7b49\u5f85\u5b50\u8fdb\u7a0b&#xff09;<\/span><br \/>\n    <span class=\"token function\">signal<\/span><span class=\"token punctuation\">(<\/span>SIGPIPE<span class=\"token punctuation\">,<\/span> SIG_IGN<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5ffd\u7565\u7ba1\u9053\u7834\u88c2\u4fe1\u53f7<\/span><br \/>\n    <span class=\"token function\">signal<\/span><span class=\"token punctuation\">(<\/span>SIGSTOP<span class=\"token punctuation\">,<\/span> SIG_IGN<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5ffd\u7565\u505c\u6b62\u4fe1\u53f7&#xff08;\u901a\u5e38\u7528\u6237\u53d1\u9001\u7684 Ctrl&#043;Z&#xff09;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u5c06\u5f53\u524d\u8fdb\u7a0b\u53d8\u4e3a\u72ec\u7acb\u4f1a\u8bdd\u7684\u9886\u5bfc\u8005<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token function\">fork<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u7236\u8fdb\u7a0b\u9000\u51fa&#xff0c;\u5b50\u8fdb\u7a0b\u7ee7\u7eed<\/span><br \/>\n        <span class=\"token function\">exit<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token function\">setsid<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u521b\u5efa\u65b0\u7684\u4f1a\u8bdd&#xff0c;\u8131\u79bb\u7ec8\u7aef&#xff0c;\u6210\u4e3a\u4f1a\u8bdd\u9886\u5bfc\u8005<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u5982\u679c\u4f20\u5165\u4e86\u5de5\u4f5c\u76ee\u5f55\u8def\u5f84&#xff0c;\u5c1d\u8bd5\u66f4\u6539\u76ee\u5f55\u6743\u9650<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token operator\">!<\/span>chdir<span class=\"token punctuation\">.<\/span><span class=\"token function\">empty<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token function\">chmod<\/span><span class=\"token punctuation\">(<\/span>chdir<span class=\"token punctuation\">.<\/span><span class=\"token function\">c_str<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0777<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ chmod \u9700\u8981\u4f20\u9012\u6743\u9650\u503c\u53c2\u6570&#xff0c;\u8fd9\u91cc\u5047\u8bbe\u4e3a 0777<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u6253\u5f00 \/dev\/null \u8bbe\u5907\u6587\u4ef6&#xff0c;\u4ee5\u53ea\u8bfb\u65b9\u5f0f\u6253\u5f00<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> fd <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">open<\/span><span class=\"token punctuation\">(<\/span>nullfile<span class=\"token punctuation\">.<\/span><span class=\"token function\">c_str<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> 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function\">dup2<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> fd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5c06\u6807\u51c6\u8f93\u51fa&#xff08;fd 1&#xff09;\u91cd\u5b9a\u5411\u5230 \/dev\/null<\/span><br \/>\n        <span class=\"token function\">dup2<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> fd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u5c06\u6807\u51c6\u9519\u8bef\u8f93\u51fa&#xff08;fd 2&#xff09;\u91cd\u5b9a\u5411\u5230 \/dev\/null<\/span><br \/>\n        <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>fd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>    <span class=\"token comment\">\/\/ \u5173\u95ed\u6587\u4ef6\u63cf\u8ff0\u7b26<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<ul>\n<li>\u5ffd\u7565\u5f02\u5e38\u4fe1\u53f7&#xff1a;\u5b88\u62a4\u8fdb\u7a0b\u901a\u5e38\u4e0d\u4f1a\u5e72\u6270\u7ec8\u7aef\u4fe1\u53f7&#xff0c;\u56e0\u6b64\u5ffd\u7565\u4e86\u4e0e\u5b50\u8fdb\u7a0b\u3001\u7ba1\u9053\u7834\u88c2\u548c\u505c\u6b62\u4fe1\u53f7\u76f8\u5173\u7684\u4fe1\u53f7\u3002<\/li>\n<li>\u8131\u79bb\u7ec8\u7aef&#xff1a;\u901a\u8fc7 fork() \u548c setsid() \u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u4f1a\u8bdd&#xff0c;\u4f7f\u5f97\u5b88\u62a4\u8fdb\u7a0b\u4e0d\u518d\u53d7\u63a7\u5236\u7ec8\u7aef\u5f71\u54cd\u3002<\/li>\n<li>\u4fee\u6539\u5de5\u4f5c\u76ee\u5f55&#xff1a;\u5c1d\u8bd5\u4fee\u6539\u5de5\u4f5c\u76ee\u5f55&#xff08;\u4f46\u4ee3\u7801\u5b58\u5728\u9519\u8bef&#xff0c;\u5e94\u6539\u4e3a chdir()&#xff09;\u3002<\/li>\n<li>\u91cd\u5b9a\u5411\u8f93\u5165\u8f93\u51fa&#xff1a;\u5c06\u6807\u51c6\u8f93\u5165\u3001\u8f93\u51fa\u548c\u9519\u8bef\u8f93\u51fa\u91cd\u5b9a\u5411\u5230 \/dev\/null&#xff0c;\u907f\u514d\u8fdb\u7a0b\u4e0e\u7ec8\u7aef\u4ea4\u4e92\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb1.1k\u6b21\uff0c\u70b9\u8d5e63\u6b21\uff0c\u6536\u85cf53\u6b21\u3002\u6458\u8981\uff1aLinux\u5b88\u62a4\u8fdb\u7a0b\u539f\u7406\u4e0e\u8fdb\u7a0b\u7ba1\u7406 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