{"id":40018,"date":"2025-05-27T07:12:50","date_gmt":"2025-05-26T23:12:50","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/40018.html"},"modified":"2025-05-27T07:12:50","modified_gmt":"2025-05-26T23:12:50","slug":"%e3%80%90%e5%af%bb%e6%89%belinux%e7%9a%84%e5%a5%a5%e7%a7%98%e3%80%91%e7%ac%ac%e5%85%ab%e7%ab%a0%ef%bc%9a%e8%bf%9b%e7%a8%8b%e6%8e%a7%e5%88%b6","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/40018.html","title":{"rendered":"\u3010\u5bfb\u627eLinux\u7684\u5965\u79d8\u3011\u7b2c\u516b\u7ae0\uff1a\u8fdb\u7a0b\u63a7\u5236"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250526231246-6834f56e076eb.png\" alt=\"QQ20250523-135714\" \/> <\/p>\n<h4><font color=\"red\">\u8bf7\u541b\u6d4f\u89c8<\/font><\/h4>\n<ul>\n<li>\n<ul>\n<li>\u524d\u8a00<\/li>\n<li>1. \u8fdb\u7a0b\u521b\u5efa<\/li>\n<li>\n<ul>\n<li>1.1 fork\u51fd\u6570<\/li>\n<li>1.2 \u5199\u65f6\u62f7\u8d1d<\/li>\n<\/ul>\n<\/li>\n<li>2. \u8fdb\u7a0b\u7ec8\u6b62<\/li>\n<li>\n<ul>\n<li>2.1 \u5e38\u89c1\u9000\u51fa\u65b9\u6cd5<\/li>\n<li>2.2 \u9000\u51fa\u7801<\/li>\n<li>2.3 exit\u3001_exit\u3001return<\/li>\n<\/ul>\n<\/li>\n<li>3. \u8fdb\u7a0b\u7b49\u5f85<\/li>\n<li>\n<ul>\n<li>3.1 \u7b49\u5f85\u7684\u5fc5\u8981\u6027<\/li>\n<li>3.2 \u7b49\u5f85\u7684\u65b9\u6cd5<\/li>\n<li>\n<ul>\n<li>3.2.1 wait\u65b9\u6cd5<\/li>\n<li>3.2.2 waitpid\u65b9\u6cd5<\/li>\n<\/ul>\n<\/li>\n<li>3.3 \u83b7\u5f97\u5b50\u8fdb\u7a0bstatus<\/li>\n<\/ul>\n<\/li>\n<li>4. \u8fdb\u7a0b\u66ff\u6362<\/li>\n<li>\n<ul>\n<li>4.1 \u66ff\u6362\u539f\u7406<\/li>\n<li>4.2 \u66ff\u6362\u51fd\u6570<\/li>\n<\/ul>\n<\/li>\n<li>\u5c3e\u58f0<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>\u524d\u8a00<\/h3>\n<p>\u672c\u4e13\u9898\u5c06\u57fa\u4e8eLinux\u64cd\u4f5c\u7cfb\u7edf\u6765\u5e26\u9886\u5927\u5bb6\u5b66\u4e60\u64cd\u4f5c\u7cfb\u7edf\u65b9\u9762\u7684\u77e5\u8bc6\u4ee5\u53ca\u5b66\u4e60\u4f7f\u7528Linux\u64cd\u4f5c\u7cfb\u7edf\u3002\u524d\u9762\u6211\u4eec\u8ba4\u8bc6\u4e86\u8fdb\u7a0b&#xff0c;\u4e5f\u4e86\u89e3\u73af\u5883\u53d8\u91cf\u548c\u865a\u62df\u5730\u5740\u7a7a\u95f4\u7684\u6982\u5ff5&#xff0c;\u90a3\u4e48\u672c\u7ae0\u8ba9\u6211\u4eec\u66f4\u6df1\u5165\u5730\u53bb\u4e86\u89e3\u8fdb\u7a0b\u3002\u672c\u7ae0\u6211\u4eec\u8981\u5b66\u4e60\u7684\u662f\u2014\u2014\u8fdb\u7a0b\u63a7\u5236<\/p>\n<h3>1. \u8fdb\u7a0b\u521b\u5efa<\/h3>\n<h4>1.1 fork\u51fd\u6570<\/h4>\n<p>\u5728\u524d\u9762\u6211\u4eec\u8ba4\u8bc6\u8fdb\u7a0b\u7684\u65f6\u5019\u5df2\u7ecf\u4e86\u89e3\u4e86\u5982\u4f55\u901a\u8fc7fork\u51fd\u6570\u53bb\u521b\u5efa\u4e00\u4e2a\u8fdb\u7a0b&#xff0c;\u90a3\u4e48\u8fd9\u91cc\u5c31\u7b80\u5355\u7684\u56de\u987e\u4e00\u4e0b\u3002<\/p>\n<p>\u5728Linux\u4e2dfork\u51fd\u6570\u662f\u4e00\u4e2a\u2fae\u5e38\u91cd\u8981\u7684\u51fd\u6570&#xff0c;\u5b83\u662f\u4e00\u4e2a\u7cfb\u7edf\u8c03\u7528&#xff1a; <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250526231247-6834f56fc0f72.png\" alt=\"QQ20250524-230649\" \/><\/p>\n<p>\u5b83\u7684\u4f5c\u7528\u5c31\u662f\u4ece\u5df2\u5b58\u5728\u7684\u8fdb\u7a0b\u4e2d\u521b\u5efa\u2f00\u4e2a\u65b0\u8fdb\u7a0b\u3002\u65b0\u8fdb\u7a0b\u4e3a\u2f26\u8fdb\u7a0b&#xff0c;\u2f7d\u539f\u8fdb\u7a0b\u4e3a\u2f57\u8fdb\u7a0b\u3002<\/p>\n<p>fork\u51fd\u6570\u4f1a\u6709\u4e24\u4e2a\u8fd4\u56de\u503c&#xff0c;\u5b83\u4f1a\u7ed9\u7236\u8fdb\u7a0b\u8fd4\u56de\u5b50\u8fdb\u7a0b\u7684pid&#xff0c;\u7ed9\u5b50\u8fdb\u7a0b\u8fd4\u56de0&#xff1b;\u5982\u679c\u8fdb\u7a0b\u521b\u5efa\u5931\u8d25&#xff0c;\u5c31\u4f1a\u7ed9\u7236\u8fdb\u7a0b\u8fd4\u56de-1\u3002<img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250526231247-6834f56fd27a5.png\" alt=\"QQ20250524-231454\" \/><\/p>\n<p>fork\u8c03\u7528\u5931\u8d25\u7684\u539f\u56e0&#xff1a;<\/p>\n<ul>\n<li>\u7cfb\u7edf\u5bf9\u6bcf\u4e2a\u7528\u6237\u80fd\u521b\u5efa\u7684\u6700\u5927\u8fdb\u7a0b\u6570\u6709\u9650\u5236\u3002<\/li>\n<li>\u6574\u4e2a\u7cfb\u7edf\u7684\u6700\u5927\u8fdb\u7a0b\u6570\u91cf\u5df2\u8fbe\u4e0a\u9650\u3002<\/li>\n<li>\u5f53\u524d\u8fdb\u7a0b\u6253\u5f00\u4e86\u592a\u591a\u6587\u4ef6\u6216\u5176\u4ed6\u5185\u6838\u8d44\u6e90&#xff0c;\u65b0\u8fdb\u7a0b\u521b\u5efa\u65f6\u65e0\u6cd5\u590d\u5236\u8d44\u6e90\u63cf\u8ff0\u7b26\u8868&#xff08;\u5b58\u5728\u4e8e PCB \u4e2d&#xff0c;\u7528\u4e8e\u7ba1\u7406\u8fdb\u7a0b\u6253\u5f00\u7684\u6587\u4ef6&#xff09;\u3002<\/li>\n<\/ul>\n<p>\u539f\u56e0\u524d\u9762\u6211\u4eec\u4e5f\u8bb2\u8fc7\u4e86&#xff0c;\u5f53\u8fdb\u7a0b\u8c03\u7528fork\u65f6&#xff0c;\u4e5f\u5c31\u662f\u7a0b\u5e8f\u5728\u6267\u884c\u5185\u6838\u4e2d\u7684fork\u4ee3\u7801\u65f6&#xff0c;\u5728\u51fd\u6570\u4e2d\u4f1a\u4f9d\u6b21\u8fdb\u884c\u4e0b\u5217\u64cd\u4f5c&#xff1a;<\/p>\n<ul>\n<li>\u5206\u914d\u65b0\u7684\u5185\u5b58\u5757\u548c\u5185\u6838\u6570\u636e\u7ed3\u6784\u7ed9\u2f26\u8fdb\u7a0b\u3002<\/li>\n<li>\u5c06\u2f57\u8fdb\u7a0b\u90e8\u5206\u6570\u636e\u7ed3\u6784\u5185\u5bb9\u62f7\u2ec9\u2f84\u2f26\u8fdb\u7a0b\u3002<\/li>\n<li>\u6dfb\u52a0\u2f26\u8fdb\u7a0b\u5230\u7cfb\u7edf\u8fdb\u7a0b\u5217\u8868\u5f53\u4e2d\u3002<\/li>\n<li>fork\u8fd4\u56de&#xff0c;\u5f00\u59cb\u8c03\u5ea6\u5668\u8c03\u5ea6\u3002<\/li>\n<\/ul>\n<p>\u4e5f\u5c31\u662f\u8bf4&#xff0c;\u5728fork\u51fd\u6570\u8fd8\u6ca1\u6709\u6267\u884c\u5b8c\u65f6&#xff0c;\u5b50\u8fdb\u7a0b\u5c31\u5df2\u7ecf\u88ab\u521b\u5efa\u51fa\u6765\u4e86&#xff0c;\u5e76\u4e14\u548c\u7236\u8fdb\u7a0b\u62e5\u6709\u76f8\u540c\u7684\u4ee3\u7801\u548c\u6570\u636e&#xff0c;\u6240\u4ee5\u7236\u8fdb\u7a0b\u548c\u5b50\u8fdb\u7a0b\u90fd\u4f1a\u6709\u81ea\u5df1\u7684\u8fd4\u56de\u503c\u5728fork\u4e2d\u3002\u6240\u4ee5\u770b\u4f3cfork\u51fd\u6570\u6709\u4e24\u4e2a\u8fd4\u56de\u503c\u662f\u6211\u4eec\u8089\u773c\u6240\u770b\u5230\u8ba4\u4e3a\u7684&#xff0c;\u5b9e\u9645\u4e0a\u662f\u6709\u4e24\u4e2a\u8fdb\u7a0b\u5728\u6267\u884c&#xff0c;\u5b83\u4eec\u6709\u5404\u81ea\u7684\u8fd4\u56de\u503c\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250526231247-6834f56fe8867.png\" alt=\"QQ20250524-232747\" \/><\/p>\n<p>\u5f53\u2f00\u4e2a\u8fdb\u7a0b\u8c03\u2f64fork\u51fd\u6570\u4e4b\u540e&#xff0c;\u5c31\u6709\u4e24\u4e2a\u2f06\u8fdb\u5236\u4ee3\u7801\u76f8\u540c\u7684\u8fdb\u7a0b\u3002\u2f7d\u4e14\u5b83\u4eec\u90fd\u8fd0\u2f8f\u5230\u76f8\u540c\u7684\u5730\u2f45\u3002\u4f46\u4e4b\u540e\u6bcf\u4e2a\u8fdb\u7a0b\u90fd\u5c06\u53ef\u4ee5\u5f00\u59cb\u5b83\u4eec\u2f83\u2f30\u7684\u65c5\u7a0b&#xff08;\u6839\u636epid\u8fdb\u884c\u5206\u6d41&#xff09;\u3002\u4e0b\u9762\u8ba9\u6211\u4eec\u7528\u4e00\u4e2a\u793a\u4f8b\u6765\u611f\u53d7\u4e00\u4e0b&#xff1a;<\/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;unistd.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">pid_t<\/span> pid<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Before: pid is %d\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">getpid<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span> <span class=\"token punctuation\">(<\/span>pid<span class=\"token operator\">&#061;<\/span><span class=\"token function\">fork<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span> <span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;fork()&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/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>   <\/p>\n<p>    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;After:pid is %d, fork return %d\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">getpid<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> pid<span class=\"token punctuation\">)<\/span><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<p>\u8fd0\u884c\u7a0b\u5e8f\u6211\u4eec\u5f97\u5230\u5982\u4e0b\u7684\u7ed3\u679c&#xff1a;<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250526231248-6834f57015f9b.png\" alt=\"QQ20250524-233237\" \/><\/p>\n<p>\u53ef\u4ee5\u770b\u5230\u8fd9\u91cc\u6709\u4e09\u884c\u8f93\u51fa&#xff0c;\u4e00\u884cbefore&#xff0c;\u4e24\u884cafter&#xff0c;\u53ef\u4ee5\u5f88\u6e05\u6670\u7684\u770b\u5230\u524d\u4e24\u884c\u662f\u6211\u4eec\u7236\u8fdb\u7a0b\u6267\u884c\u7684\u7ed3\u679c&#xff0c;\u6700\u540e\u4e00\u884c\u662f\u5b50\u8fdb\u7a0b\u6267\u884c\u7684\u7ed3\u679c\u3002\u8fd9\u4e5f\u9a8c\u8bc1\u4e86\u6211\u4eec\u4e0a\u9762\u6240\u8bf4\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250526231248-6834f57023972.png\" alt=\"QQ20250524-233502\" \/><\/p>\n<p>\u6240\u4ee5&#xff0c;\u6267\u884cfork\u4e4b\u524d\u2f57\u8fdb\u7a0b\u72ec\u2f74\u6267\u2f8f&#xff1b;\u6267\u884cfork\u4e4b\u540e&#xff0c;\u2f57\u2f26\u4e24\u4e2a\u6267\u2f8f\u6d41\u5206\u522b\u6267\u2f8f\u3002\u6ce8\u610f&#xff0c;fork\u4e4b\u540e&#xff0c;\u8c01\u5148\u6267\u2f8f\u5b8c\u5168\u7531\u8c03\u5ea6\u5668\u51b3\u5b9a&#xff08;\u4e5f\u5c31\u662f\u901a\u8fc7\u8c03\u5ea6\u7b97\u6cd5\u6dfb\u52a0\u5230\u8c03\u5ea6\u961f\u5217&#xff09;\u3002<\/p>\n<p>fork\u7684\u5e38\u89c4\u7528\u6cd5&#xff1a;<\/p>\n<ul>\n<li>\u2f00\u4e2a\u2f57\u8fdb\u7a0b\u5e0c\u671b\u590d\u5236\u2f83\u2f30&#xff0c;\u4f7f\u2f57\u2f26\u8fdb\u7a0b\u540c\u65f6\u6267\u2f8f\u4e0d\u540c\u7684\u4ee3\u7801\u6bb5\u3002\u4f8b\u5982&#xff0c;\u2f57\u8fdb\u7a0b\u7b49\u5f85\u5ba2\u2f3e\u7aef\u8bf7\u6c42&#xff0c;\u2f63\u6210\u2f26\u8fdb\u7a0b\u6765\u5904\u7406\u8bf7\u6c42\u3002<\/li>\n<li>\u2f00\u4e2a\u8fdb\u7a0b\u8981\u6267\u2f8f\u2f00\u4e2a\u4e0d\u540c\u7684\u7a0b\u5e8f\u3002\u4f8b\u5982\u2f26\u8fdb\u7a0b\u4ecefork\u8fd4\u56de\u540e&#xff0c;\u8c03\u2f64exec\u51fd\u6570&#xff08;\u4e5f\u5c31\u662f\u8fdb\u7a0b\u66ff\u6362&#xff0c;\u4e0b\u9762\u8bb2&#xff09;\u3002<\/li>\n<\/ul>\n<h4>1.2 \u5199\u65f6\u62f7\u8d1d<\/h4>\n<p>\u524d\u9762\u6211\u4eec\u8bf4\u8fc7&#xff0c;\u5b50\u8fdb\u7a0b\u88ab\u521b\u5efa\u4e4b\u540e\u4e0d\u4ec5\u548c\u7236\u8fdb\u7a0b\u5171\u4eab\u4ee3\u7801&#xff0c;\u5728\u6570\u636e\u88ab\u4fee\u6539\u4e4b\u524d\u4e5f\u662f\u5171\u4eab\u7684\u3002\u4f46\u7531\u4e8e\u8981\u4fdd\u6301\u8fdb\u7a0b\u4e4b\u95f4\u7684\u72ec\u7acb\u6027&#xff0c;\u5f53\u4efb\u610f\u2f00\u2f45\u8bd5\u56fe\u5199\u2f0a\u6570\u636e&#xff0c;OS\u5c31\u4f1a\u91cd\u65b0\u5f00\u8f9f\u4e00\u5757\u7a7a\u95f4&#xff0c;\u5c06\u6570\u636e\u62f7\u8d1d\u4e00\u4efd&#xff0c;\u540c\u65f6\u5c06\u9875\u8868\u4e0a\u76f8\u5bf9\u5e94\u7684\u7269\u7406\u5730\u5740\u8fdb\u884c\u66f4\u6539&#xff0c;\u8fd9\u6837\u7236\u5b50\u8fdb\u7a0b\u5c31\u53ef\u4ee5\u968f\u610f\u4fee\u6539\u81ea\u5df1\u7684\u6570\u636e\u4e86&#xff0c;\u8fd9\u79cd\u65b9\u5f0f\u79f0\u4f5c\u5199\u65f6\u62f7\u8d1d\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250526231248-6834f5704253a.png\" alt=\"QQ20250524-234826\" \/><\/p>\n<p>\u5199\u65f6\u62f7\u2ec9\u662f\u2f00\u79cd\u5ef6\u65f6\u7533\u8bf7\u6280\u672f&#xff0c;\u53ef\u4ee5\u63d0\u2fbc\u6574\u673a\u5185\u5b58\u7684\u4f7f\u2f64\u7387\u3002\u5199\u65f6\u62f7\u8d1d\u7684\u597d\u5904&#xff1a;<\/p>\n<ul>\n<li>\u8282\u7701\u5185\u5b58&#xff1a;\u5728\u591a\u4e2a\u5bf9\u8c61\u5171\u4eab\u540c\u4e00\u6570\u636e\u65f6&#xff0c;\u4e0d\u7acb\u5373\u590d\u5236\u6570\u636e&#xff0c;\u53ea\u6709\u5728\u5176\u4e2d\u4e00\u4e2a\u4fee\u6539\u6570\u636e\u65f6\u624d\u8fdb\u884c\u590d\u5236&#xff0c;\u51cf\u5c11\u4e86\u4e0d\u5fc5\u8981\u7684\u5185\u5b58\u4f7f\u7528\u3002<\/li>\n<li>\u63d0\u9ad8\u6027\u80fd&#xff1a;\u521d\u59cb\u5316\u65f6\u65e0\u9700\u590d\u5236\u6570\u636e&#xff0c;\u51cf\u5c11\u4e86 CPU \u548c\u5185\u5b58\u7684\u5f00\u9500&#xff0c;\u63d0\u9ad8\u4e86\u7cfb\u7edf\u54cd\u5e94\u901f\u5ea6\u3002<\/li>\n<li>\u652f\u6301\u5e76\u53d1&#xff1a;\u591a\u4e2a\u8fdb\u7a0b\u6216\u7ebf\u7a0b\u53ef\u4ee5\u5e76\u53d1\u8bfb\u53d6\u540c\u4e00\u4efd\u6570\u636e\u800c\u65e0\u9700\u52a0\u9501&#xff0c;\u76f4\u5230\u67d0\u4e2a\u5199\u5165\u65f6\u624d\u5206\u79bb&#xff0c;\u51cf\u5c11\u540c\u6b65\u64cd\u4f5c\u7684\u590d\u6742\u6027\u3002&#xff08;\u5f53\u524d\u4e86\u89e3\u5373\u53ef&#xff09;<\/li>\n<\/ul>\n<p>\u6b63\u662f\u6709\u4e86\u5199\u65f6\u62f7\u2ec9\u6280\u672f\u7684\u5b58\u5728&#xff0c;\u6240\u4ee5\u2f57\u2f26\u8fdb\u7a0b\u624d\u5f97\u4ee5\u5f7b\u5e95\u5206\u79bb&#xff0c;\u5b8c\u6210\u4e86\u8fdb\u7a0b\u72ec\u2f74\u6027\u7684\u6280\u672f\u4fdd\u8bc1\u3002<\/p>\n<h3>2. \u8fdb\u7a0b\u7ec8\u6b62<\/h3>\n<p>\u8fdb\u7a0b\u7ec8\u6b62&#xff08;Process Termination&#xff09;\u662f\u6307\u4e00\u4e2a\u8fdb\u7a0b\u7684\u751f\u547d\u5468\u671f\u7ed3\u675f&#xff0c;\u5b83\u91ca\u653e\u6240\u5360\u7528\u7684\u8d44\u6e90\u3001\u9000\u51fa\u5185\u6838\u8c03\u5ea6&#xff0c;\u53ef\u80fd\u8fd8\u4f1a\u628a\u4fe1\u606f\u4f20\u9012\u7ed9\u7236\u8fdb\u7a0b\u3002\u5b83\u7684\u672c\u8d28\u662f\u91ca\u653e\u7cfb\u7edf\u8d44\u6e90\u3002<\/p>\n<h4>2.1 \u5e38\u89c1\u9000\u51fa\u65b9\u6cd5<\/h4>\n<p>\u4e00\u4e2a\u8fdb\u7a0b\u7ec8\u6b62\u4e00\u822c\u6709\u4e09\u79cd\u60c5\u51b5&#xff1a;<\/p>\n<ul>\n<li>\u4ee3\u7801\u8fd0\u884c\u5b8c\u6bd5&#xff0c;\u7ed3\u679c\u6b63\u786e\u3002<\/li>\n<li>\u4ee3\u7801\u8fd0\u884c\u5b8c\u6bd5&#xff0c;\u7ed3\u679c\u9519\u8bef\u3002<\/li>\n<li>\u4ee3\u7801\u5f02\u5e38\u7ec8\u6b62\u3002<\/li>\n<\/ul>\n<p>\u90a3\u4e48\u5f53\u4ee3\u7801\u6b63\u5e38\u6267\u884c\u5b8c\u540e&#xff0c;\u6211\u4eec\u8be5\u5982\u4f55\u5224\u65ad\u7ed3\u679c\u662f\u5426\u662f\u6b63\u786e\u7684\u5462&#xff1f;<\/p>\n<p>\u5176\u5b9e\u5728\u6211\u4eec\u5b66\u4e60C\/C&#043;&#043;\u7684\u65f6\u5019&#xff0c;\u6211\u4eec\u77e5\u9053main\u51fd\u6570\u7684\u7ed3\u675f\u5c31\u662freturn\u8bed\u53e5&#xff0c;return\u8fd4\u56de\u7684\u503c\u6211\u4eec\u79f0\u4e4b\u4e3a\u9000\u51fa\u7801&#xff0c;\u6240\u4ee5main\u51fd\u6570\u7684\u8fd4\u56de\u503c\u901a\u5e38\u8868\u660e\u7a0b\u5e8f\u7684\u6267\u884c\u60c5\u51b5&#xff0c;\u5f53\u4ee3\u7801\u6b63\u5e38\u6267\u884c\u5e76\u4e14\u7ed3\u679c\u6b63\u786e&#xff0c;\u6211\u4eec\u4e00\u822c\u5c06\u8fd4\u56de\u503c\u8bbe\u7f6e\u4e3a0&#xff0c;\u7ed3\u679c\u4e0d\u6b63\u786e\u65f6\u4f1a\u8fd4\u56de!0&#xff0c;\u8fd9\u91cc\u53ef\u4ee5\u6709\u5f88\u591a\u7684\u503c&#xff0c;\u4e0d\u540c\u7684\u503c\u8868\u660e\u4e0d\u540c\u7684\u51fa\u9519\u539f\u56e0\u3002\u5f53\u4ee3\u7801\u5f02\u5e38\u7ec8\u6b62\u65f6\u9000\u51fa\u7801\u5c31\u6ca1\u6709\u610f\u4e49\u4e86\u3002<\/p>\n<p>\u7a0b\u5e8f\u4e00\u65e6\u5f02\u5e38\u7ec8\u6b62&#xff0c;\u4e00\u822c\u662f\u8fdb\u7a0b\u6536\u5230\u4e86\u4fe1\u53f7\u3002&#xff08;\u5bf9\u4e8e\u4fe1\u53f7\u540e\u9762\u4f1a\u8fdb\u884c\u8be6\u7ec6\u8bb2\u89e3&#xff09;<\/p>\n<p>\u5e38\u89c1\u7684\u8fdb\u7a0b\u7ec8\u6b62\u65b9\u5f0f&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u6b63\u5e38\u7ec8\u6b62&#xff08;\u81ea\u613f\u9000\u51fa&#xff09;&#xff1a;\u4ee3\u7801\u6b63\u5e38\u8fd0\u884c\u7ed3\u675f<\/p>\n<table>\n<tr>\u65b9\u6cd5\u63cf\u8ff0<\/tr>\n<tbody>\n<tr>\n<td>return \u4ece main() \u8fd4\u56de<\/td>\n<td>\u4e3b\u51fd\u6570\u8fd4\u56de\u65f6\u8fdb\u7a0b\u81ea\u52a8\u7ec8\u6b62<\/td>\n<\/tr>\n<tr>\n<td>exit(int status)<\/td>\n<td>\u6807\u51c6\u5e93\u51fd\u6570&#xff0c;\u7ec8\u6b62\u8fdb\u7a0b\u5e76\u8fd4\u56de\u72b6\u6001\u7801status\u7ed9\u7236\u8fdb\u7a0b<\/td>\n<\/tr>\n<tr>\n<td>_exit(int status)<\/td>\n<td>\u7cfb\u7edf\u8c03\u7528&#xff0c;\u7acb\u5373\u7ec8\u6b62&#xff0c;\u4e0d\u5237\u65b0\u7f13\u51b2\u533a&#xff08;\u66f4\u5e95\u5c42&#xff09;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n<li>\n<p>\u5f02\u5e38\u7ec8\u6b62&#xff08;\u51fa\u9519\u6216\u88ab\u5f3a\u5236\u6740\u6b7b&#xff09;&#xff1a;\u4ee3\u7801\u6ca1\u6709\u6b63\u5e38\u8fd0\u884c\u7ed3\u675f<\/p>\n<table>\n<tr>\u65b9\u5f0f\u63cf\u8ff0<\/tr>\n<tbody>\n<tr>\n<td>\u9519\u8bef\u5f15\u8d77\u7684\u5d29\u6e83<\/td>\n<td>\u5982\u6bb5\u9519\u8bef&#xff08;Segmentation Fault&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>\u88ab\u4fe1\u53f7\u6740\u6b7b<\/td>\n<td>\u5982 SIGKILL, SIGTERM, SIGINT<\/td>\n<\/tr>\n<tr>\n<td>\u4f7f\u7528 abort()<\/td>\n<td>\u5f3a\u5236\u7ec8\u6b62\u8fdb\u7a0b&#xff08;\u901a\u5e38\u7528\u4e8e\u8c03\u8bd5\/\u9519\u8bef\u5904\u7406&#xff09;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n<\/ul>\n<ul>\n<li>main&#xff1a;main\u51fd\u6570\u7ed3\u675f&#xff0c;\u5c31\u8868\u793a\u8fdb\u7a0b\u7ed3\u675f&#xff1b;\u5bf9\u4e8e\u5176\u4ed6\u51fd\u6570\u7684\u7ed3\u675f\u5219\u53ea\u8868\u793a\u51fd\u6570\u8c03\u7528\u5b8c\u6210&#xff0c;\u5e76\u4e14\u8fd4\u56de\u5230\u4e0a\u4e00\u7ea7\u51fd\u6570\u3002<\/li>\n<li>exit&#xff1a;\u5728\u4efb\u4f55\u5730\u65b9\u8c03\u7528exit&#xff0c;\u90fd\u8868\u793a\u8fdb\u7a0b\u7ed3\u675f&#xff0c;\u5305\u62ec\u5728main\u4e2d\u8c03\u7528\u5176\u4ed6\u51fd\u6570\u65f6\u3002\u5e76\u8fd4\u56de\u7ed9\u7236\u8fdb\u7a0b\u5b50\u8fdb\u7a0b\u7684\u9000\u51fa\u7801<\/li>\n<\/ul>\n<h4>2.2 \u9000\u51fa\u7801<\/h4>\n<p>\u8fdb\u7a0b\u7684\u9000\u51fa\u7801\u4e5f\u662f\u8fdb\u7a0b\u7684\u4e00\u79cd\u5c5e\u6027&#xff0c;\u6240\u4ee5\u5b83\u4e5f\u5b58\u653e\u5728\u8fdb\u7a0b\u7684task_struct&#xff08;PCB&#xff09;\u4e0a\u3002<\/p>\n<p>\u5728Linux\u4e2d&#xff0c;\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7echo $?\u547d\u4ee4\u6765\u67e5\u770b\u6700\u8fd1\u4e00\u4e2a\u7a0b\u5e8f&#xff08;\u8fdb\u7a0b&#xff09;\u9000\u51fa\u65f6\u7684\u9000\u51fa\u7801\u3002\u6211\u4eec\u8fd0\u884c\u4e00\u4e0b\u4e0a\u9762\u4e3e\u4f8b\u5b50\u65f6\u4f7f\u7528\u7684\u4ee3\u7801&#xff0c;\u7136\u540e\u4f7f\u7528echo\u67e5\u770b&#xff1a;<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250526231248-6834f57063905.png\" alt=\"QQ20250525-115437\" \/><\/p>\n<p>\u6211\u4eec\u5c06\u4e0a\u8ff0\u4ee3\u7801\u7684return\u7ed3\u679c\u8be5\u621010\u518d\u6765\u770b\u4e00\u770b\u7ed3\u679c&#xff1a;<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250526231248-6834f57072701.png\" alt=\"QQ20250525-115549\" \/><\/p>\n<p>\u53ef\u4ee5\u53d1\u73b0&#xff0c;\u5bf9\u4e8e\u6211\u4eec\u81ea\u5df1\u5199\u7684\u4ee3\u7801&#xff0c;\u6211\u4eec\u53ef\u4ee5\u81ea\u5df1\u5b9a\u4e49\u5b83\u7684\u8fd4\u56de\u503c&#xff0c;\u5e76\u7ed9\u6bcf\u4e00\u4e2a\u8fd4\u56de\u503c\u4e00\u4e2a\u7279\u5b9a\u7684\u542b\u4e49&#xff0c;\u53ef\u4ee5\u901a\u8fc7\u4e0d\u540c\u7684\u8fd4\u56de\u503c\u53bb\u77e5\u6653\u7a0b\u5e8f\u8fd0\u884c\u7684\u5177\u4f53\u7ed3\u679c\u3002\u90a3\u4e48\u5bf9\u4e8eshell\u4e2d\u7684\u547d\u4ee4\u662f\u5426\u6709\u5bf9\u5e94\u7684\u9000\u51fa\u7801\u5462&#xff1f;\u6211\u4eec\u77e5\u9053\u6267\u884c\u8fd9\u4e9b\u547d\u4ee4\u65f6\u5b83\u4eec\u4e5f\u662f\u8fdb\u7a0b&#xff0c;\u4e0b\u9762\u8ba9\u6211\u4eec\u6765\u770b\u4e00\u770b&#xff1a; <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250526231248-6834f57081290.png\" alt=\"QQ20250525-120226\" \/><\/p>\n<p>\u53ef\u4ee5\u53d1\u73b0&#xff0c;\u5f53\u6211\u4eec\u7684\u6307\u4ee4\u6b63\u5e38\u6267\u884c\u540e&#xff0c;\u9000\u51fa\u7801\u5c31\u662f0&#xff0c;\u8868\u793a\u6267\u884c\u6210\u529f&#xff0c;\u6ca1\u6709\u9519\u8bef\u3002\u5f53\u6211\u4eec\u7b2c\u4e8c\u6b21\u6267\u884cls\u65f6\u6211\u4eec\u53bb\u5bfb\u627e\u4e00\u4e2a\u4e0d\u5b58\u5728\u7684\u76ee\u5f55\u65f6&#xff0c;\u6211\u4eec\u53d1\u73b0\u5b83\u7684\u9000\u51fa\u7801\u662f2&#xff0c;\u6211\u4eec\u77e5\u9053\u5bf9\u4e8e!0\u7684\u9000\u51fa\u7801\u4ee3\u8868\u4e86\u6267\u884c\u9519\u8bef&#xff0c;\u90a3\u4e48\u9000\u51fa\u78012\u5728Linux\u4e2d\u4ee3\u8868\u4e86\u4ec0\u4e48\u542b\u4e49\u5462&#xff1f;<\/p>\n<p>\u867d\u7136\u7a0b\u5e8f\u53ef\u4ee5\u81ea\u5b9a\u4e49 !0 \u7684\u9000\u51fa\u7801&#xff0c;Linux \u4e5f\u5b9a\u4e49\u4e86\u4e00\u4e9b\u7ea6\u5b9a\u4fd7\u6210\u7684\u9000\u51fa\u7801\u542b\u4e49\u3002\u6211\u4eec\u4e4b\u524d\u5728C\u8bed\u8a00\u4e2d\u53ef\u4ee5\u4f7f\u7528strerror\u51fd\u6570\u6765\u67e5\u770b\u9000\u51fa\u7801\u5bf9\u5e94\u7684\u539f\u56e0\u662f\u4ec0\u4e48&#xff0c;\u90a3\u4e48\u8ba9\u6211\u4eec\u6765\u770b\u4e00\u770bLinux\u4e2d\u6709\u591a\u5c11\u4e2a\u9000\u51fa\u7801\u4ee5\u53ca\u5b83\u4eec\u5bf9\u5e94\u7684\u539f\u56e0&#xff1a;<\/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;stdio.h&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;string.h&gt;<\/span><\/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\">int<\/span> i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token comment\">\/\/\u5148\u5047\u8bbeLinux\u4e2dC\u6807\u51c6\u5e93\u6709150\u4e2a\u9000\u51fa\u7801<\/span><br \/>\n<span class=\"token keyword\">for<\/span><span class=\"token punctuation\">(<\/span>i<span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">150<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;%d-&gt;%s\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> i<span class=\"token punctuation\">,<\/span> <span class=\"token function\">strerror<\/span><span class=\"token punctuation\">(<\/span>i<span class=\"token punctuation\">)<\/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<p>\u8fd0\u884c\u7ed3\u679c&#xff1a;<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250526231248-6834f570919f3.png\" alt=\"QQ20250525-154815\" \/><\/p>\n<p>\u53ef\u4ee5\u770b\u5230&#xff0c;\u5728Linux\u4e2dC\u6807\u51c6\u5e93\u4e00\u5171\u7ed9\u51fa\u4e86134\u4e2a\u9000\u51fa\u7801\u53ca\u5176\u542b\u4e49&#xff0c;\u6211\u4eec\u4e5f\u770b\u5230\u4e86\u9000\u51fa\u78012\u6240\u4ee3\u8868\u7684\u542b\u4e49\u662f\u6ca1\u6709\u8be5\u6587\u4ef6\u6216\u6587\u4ef6\u5939&#xff0c;\u521a\u597d\u4e5f\u5c31\u662f\u6211\u4eec\u6267\u884cls\u65f6shell\u7ed9\u6211\u4eec\u7684\u62a5\u9519\u3002<\/p>\n<p>Linux\u4e2dShell\u7684\u4e3b\u8981\u9000\u51fa\u7801&#xff1a;<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250526231248-6834f570c78f8.png\" alt=\"QQ20250525-155812\" \/><\/p>\n<ul>\n<li>\u9000\u51fa\u7801 0 \u8868\u2f70\u547d\u4ee4\u6267\u2f8f\u2f46\u8bef&#xff0c;\u8fd9\u662f\u5b8c\u6210\u547d\u4ee4\u7684\u7406\u60f3\u72b6\u6001\u3002<\/li>\n<li>\u9000\u51fa\u7801 1 \u6211\u4eec\u4e5f\u53ef\u4ee5\u5c06\u5176\u89e3\u91ca\u4e3a \u201c\u4e0d\u88ab\u5141\u8bb8\u7684\u64cd\u4f5c\u201d\u3002\u4f8b\u5982\u5728\u6ca1\u6709 sudo \u6743\u9650\u7684\u60c5\u51b5\u4e0b\u4f7f\u2f64yum&#xff1b;\u518d\u4f8b\u5982\u9664\u4ee5 0 \u7b49\u64cd\u4f5c\u4e5f\u4f1a\u8fd4\u56de\u9519\u8bef\u7801 1 \u3002<\/li>\n<li>130 &#xff08; SIGINT \u6216 ^C &#xff09;\u548c 143 &#xff08; SIGTERM &#xff09;\u7b49\u7ec8\u2f4c\u4fe1\u53f7\u662f\u2fae\u5e38\u5178\u578b\u7684&#xff0c;\u5b83\u4eec\u5c5e\u4e8e 128&#043;n \u4fe1\u53f7&#xff0c;\u5176\u4e2d n \u4ee3\u8868\u7ec8\u2f4c\u7801\u3002<\/li>\n<li>\u53ef\u4ee5\u4f7f\u2f64strerror\u51fd\u6570\u6765\u83b7\u53d6\u9000\u51fa\u7801\u5bf9\u5e94\u7684\u63cf\u8ff0\u3002<\/li>\n<\/ul>\n<h4>2.3 exit\u3001_exit\u3001return<\/h4>\n<p>exit\u51fd\u6570\u662f\u5e93\u51fd\u6570&#xff0c;_exit\u51fd\u6570\u662f\u7cfb\u7edf\u8c03\u7528\u3002exit\u5728\u6267\u884c\u65f6\u4e5f\u4f1a\u8c03\u7528_exit&#xff0c;\u4f46\u5728\u8c03\u7528_exit\u4e4b\u524d\u8fd8\u4f1a\u505a\u5176\u4ed6\u5de5\u4f5c&#xff1a;<\/p>\n<ul>\n<li>\u6267\u2f8f\u2f64\u2f3e\u901a\u8fc7 atexit\u6216on_exit\u5b9a\u4e49\u7684\u6e05\u7406\u51fd\u6570\u3002<\/li>\n<li>\u5173\u95ed\u6240\u6709\u6253\u5f00\u7684\u6d41&#xff0c;\u6240\u6709\u7684\u7f13\u5b58\u6570\u636e\u5747\u88ab\u5199\u2f0a\u3002<\/li>\n<li>\u8c03\u2f64_exit\u3002<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250526231248-6834f570e909a.png\" alt=\"QQ20250525-122124\" \/><\/p>\n<p>\u8fd9\u662f\u4ec0\u4e48\u610f\u601d\u5462&#xff1f;\u5728\u524d\u9762\u6211\u4eec\u7a0d\u5fae\u4e86\u89e3\u4e86\u4e00\u4e0b\u7f13\u51b2\u533a&#xff0c;\u77e5\u9053\u6211\u4eec\u5982\u679c\u60f3\u8981\u5728\u663e\u793a\u5668\u4e0a\u6253\u5370\u4e00\u4e9b\u4fe1\u606f\u662f\u4f1a\u5148\u5b58\u653e\u5728\u7f13\u51b2\u533a\u4e2d\u7684&#xff0c;\u6211\u4eec\u53ef\u4ee5\u624b\u52a8\u5237\u65b0\u7f13\u51b2\u533a&#xff0c;\u4f8b\u5982fflush()\u51fd\u6570\u5237\u65b0\u6216\u8005\\\\n&#xff0c;\u4e5f\u53ef\u4ee5\u7b49\u5f85\u8fdb\u7a0b\u7ed3\u675f\u81ea\u52a8\u5237\u65b0\u7f13\u51b2\u533a\u3002\u4e5f\u5c31\u662f\u8bf4\u5f53\u6211\u4eec\u8c03\u7528exit\u7ed3\u675f\u8fdb\u7a0b\u65f6&#xff0c;\u4e5f\u4f1a\u628a\u5237\u65b0\u7f13\u51b2\u533a&#xff1b;\u800c\u76f4\u63a5\u8c03\u7528_exit\u65f6&#xff0c;\u7f13\u51b2\u533a\u4e2d\u7684\u5185\u5bb9\u5e76\u4e0d\u4f1a\u88ab\u5237\u65b0&#xff0c;\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e0b\u9762\u7684\u4ee3\u7801\u793a\u4f8b\u6765\u611f\u53d7\u4e00\u4e0b&#xff1a;<\/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;stdio.h&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;stdlib.h&gt;<\/span><\/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 function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;hello&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">exit<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8fd0\u884c\u7ed3\u679c&#xff1a;<img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250526231249-6834f57109b8e.png\" alt=\"QQ20250525-123334\" \/><\/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;stdio.h&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\">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 function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;hello&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">_exit<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u8fd0\u884c\u7ed3\u679c&#xff1a;<img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250526231249-6834f571168ac.png\" alt=\"QQ20250525-123631\" \/><\/p>\n<p>return\u662f\u2f00\u79cd\u66f4\u5e38\u2ec5\u7684\u9000\u51fa\u8fdb\u7a0b\u2f45\u6cd5\u3002\u5728main\u51fd\u6570\u4e2d\u6267\u2f8freturn n\u7b49\u540c\u4e8e\u6267\u2f8fexit(n)&#xff0c;\u5f53 main() \u51fd\u6570\u6b63\u5e38\u6267\u884c\u5e76\u4f7f\u7528 return \u8bed\u53e5\u65f6&#xff0c;\u7f16\u8bd1\u5668\u4f1a\u5c06\u8be5 return \u8f6c\u6362\u6210\u5bf9 exit() \u51fd\u6570\u7684\u8c03\u7528&#xff0c;\u5e76\u8fd4\u56de return \u4e2d\u7684\u72b6\u6001\u7801<\/p>\n<h3>3. \u8fdb\u7a0b\u7b49\u5f85<\/h3>\n<h4>3.1 \u7b49\u5f85\u7684\u5fc5\u8981\u6027<\/h4>\n<p>\u524d\u9762\u6211\u4eec\u8bf4\u8fc7&#xff0c;\u5f53\u5b50\u8fdb\u7a0b\u9000\u51fa\u65f6&#xff0c;\u7236\u8fdb\u7a0b\u5982\u679c\u4e0d\u7ba1\u4e0d\u987e&#xff0c;\u5b50\u8fdb\u7a0b\u5c31\u4f1a\u8fdb\u5165\u50f5\u5c38\u72b6\u6001&#xff0c;\u4ece\u800c\u9020\u6210\u5185\u5b58\u6cc4\u6f0f\u3002<\/p>\n<p>\u53e6\u5916&#xff0c;\u4e00\u65e6\u8fdb\u7a0b\u53d8\u6210\u50f5\u5c38\u72b6\u6001&#xff0c;\u5c31\u4f1a\u53d8\u5f97\u5200\u67aa\u4e0d\u5165&#xff0c;\u6211\u4eec\u5404\u79cd\u7ec8\u6b62\u8fdb\u7a0b\u7684\u64cd\u4f5c\u90fd\u6ca1\u6709\u4f5c\u7528&#xff0c;\u54ea\u6015\u4f7f\u7528kill -9\u547d\u4ee4\u4e5f\u65e0\u80fd\u4e3a\u529b&#xff0c;\u56e0\u4e3a\u8c01\u4e5f\u6ca1\u6709\u529e\u6cd5\u6740\u6b7b\u4e00\u4e2a\u5df2\u7ecf\u6b7b\u53bb\u7684\u8fdb\u7a0b\u3002<\/p>\n<p>\u6211\u4eec\u77e5\u9053\u7236\u8fdb\u7a0b\u521b\u5efa\u5b50\u8fdb\u7a0b\u80af\u5b9a\u4f1a\u8ba9\u5b50\u8fdb\u7a0b\u6267\u884c\u7279\u5b9a\u7684\u4efb\u52a1&#xff0c;\u5b50\u8fdb\u7a0b\u4efb\u52a1\u6267\u884c\u7684\u7ed3\u679c\u5982\u4f55\u7236\u8fdb\u7a0b\u9700\u8981\u77e5\u9053&#xff0c;\u4f8b\u5982\u2f26\u8fdb\u7a0b\u8fd0\u2f8f\u5b8c\u6210&#xff0c;\u7ed3\u679c\u5bf9\u8fd8\u662f\u4e0d\u5bf9&#xff0c;\u6216\u8005\u662f\u5426\u6b63\u5e38\u9000\u51fa\u3002<\/p>\n<p>\u6240\u4ee5\u7236\u8fdb\u7a0b\u4f1a\u901a\u8fc7\u8fdb\u7a0b\u7b49\u5f85\u7684\u65b9\u5f0f&#xff0c;\u53bb\u56de\u6536\u5b50\u8fdb\u7a0b\u7684\u8d44\u6e90&#xff0c;\u540c\u65f6\u53ef\u4ee5\u83b7\u53d6\u5b50\u8fdb\u7a0b\u7684\u9000\u51fa\u4fe1\u606f\u3002<\/p>\n<h4>3.2 \u7b49\u5f85\u7684\u65b9\u6cd5<\/h4>\n<h5>3.2.1 wait\u65b9\u6cd5<\/h5>\n<p>wait\u51fd\u6570\u4e5f\u662f\u4e00\u4e2a\u7cfb\u7edf\u8c03\u7528&#xff0c;\u7528\u4e8e\u7236\u8fdb\u7a0b\u7b49\u5f85\u5b50\u8fdb\u7a0b\u72b6\u6001\u7684\u53d8\u5316&#xff08;\u5982\u7ec8\u6b62&#xff09;&#xff1a;<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250526231249-6834f57123028.png\" alt=\"QQ20250525-161347\" \/><\/p>\n<p>wait\u7684\u529f\u80fd&#xff1a;<\/p>\n<ul>\n<li>\u7236\u8fdb\u7a0b\u8c03\u7528 wait \u540e\u4f1a\u963b\u585e&#xff0c;\u76f4\u5230\u67d0\u4e2a\u5b50\u8fdb\u7a0b\u7ec8\u6b62&#xff08;\u6216\u72b6\u6001\u6539\u53d8&#xff09;\u3002<\/li>\n<li>\u8fd4\u56de\u5b50\u8fdb\u7a0b\u7684 PID&#xff0c;\u5e76\u901a\u8fc7 status \u53c2\u6570\u83b7\u53d6\u5b50\u8fdb\u7a0b\u7684\u9000\u51fa\u72b6\u6001\u3002<\/li>\n<li>\u5982\u679c\u6ca1\u6709\u5b50\u8fdb\u7a0b&#xff0c;\u7acb\u5373\u8fd4\u56de -1 \u5e76\u8bbe\u7f6e errno \u4e3a ECHILD&#xff08;\u8868\u793a\u201c\u6ca1\u6709\u5b50\u8fdb\u7a0b\u201d&#xff08;No child processes&#xff09;&#xff09;\u3002<\/li>\n<\/ul>\n<p>wait\u7684\u53c2\u6570\u662f\u8f93\u51fa\u578b\u53c2\u6570&#xff0c;\u4e5f\u5c31\u662f\u8bf4\u6211\u4eec\u901a\u8fc7\u4f20\u9012\u4e00\u4e2a\u6307\u9488\u6765\u83b7\u53d6\u5b50\u8fdb\u7a0b\u7684\u9000\u51fa\u72b6\u6001&#xff0c;\u5982\u679c\u4e0d\u5173\u5fc3\u5219\u53ef\u4ee5\u8bbe\u7f6e\u4e3aNULL\u3002errno\u662f\u4e00\u4e2a\u5168\u5c40\u53d8\u91cf&#xff0c;\u5b58\u50a8\u6700\u8fd1\u4e00\u6b21\u7cfb\u7edf\u8c03\u7528\u6216\u5e93\u51fd\u6570\u7684\u9519\u8bef\u4ee3\u7801&#xff0c;\u6240\u4ee5\u5728C\u8bed\u8a00\u4e2d\u6211\u4eec\u901a\u5e38\u4f7f\u7528strerror(errno)\u6765\u6253\u5370\u9519\u8bef\u4fe1\u606f\u3002<\/p>\n<p>\u5982\u679c\u7236\u8fdb\u7a0b\u4f7f\u7528wait\u51fd\u6570\u7b49\u5f85\u5b50\u8fdb\u7a0b&#xff0c;\u4f46\u662f\u6b64\u65f6\u5b50\u8fdb\u7a0b\u8fd8\u6ca1\u6709\u7ed3\u675f&#xff0c;\u90a3\u4e48\u7236\u8fdb\u7a0b\u4f1a\u963b\u585e\u5728wait\u8c03\u7528\u5904&#xff08;\u548c\u4f7f\u7528scanf\u65f6\u7b49\u5f85\u6211\u4eec\u8f93\u5165\u4e00\u6837&#xff09;\u3002\u7236\u8fdb\u7a0b\u5982\u679c\u6709\u591a\u4e2a\u5b50\u8fdb\u7a0b&#xff0c;\u5728\u7236\u8fdb\u7a0b\u8c03\u7528 wait \u51fd\u6570\u65f6&#xff0c;\u4f1a\u7b49\u5f85\u6700\u5148\u7ec8\u6b62\u7684\u5b50\u8fdb\u7a0b&#xff0c;\u5e76\u4e14\u8fd4\u56de\u7b2c\u4e00\u4e2a\u5b8c\u6210\u72b6\u6001\u53d8\u5316\u7684\u5b50\u8fdb\u7a0b\u7684 PID\u3002<\/p>\n<p>\u4e0b\u9762\u8ba9\u6211\u4eec\u770b\u4e00\u770bwait\u7684\u4f7f\u7528&#xff1a;<\/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;stdio.h&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><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;stdlib.h&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;sys\/types.h&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;sys\/wait.h&gt;<\/span><\/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\">int<\/span> status<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token class-name\">pid_t<\/span> pid <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">fork<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>pid <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token function\">exit<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n         <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u8fdb\u7a0b\u521b\u5efa\u5931\u8d25\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token keyword\">else<\/span> <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>pid <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;I am child, pid is %d, ppid is %d\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">getpid<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">getppid<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token comment\">\/\/\u5b50\u8fdb\u7a0b\u6253\u5370\u5b8c\u540e\u6211\u4eec\u76f4\u63a5\u8ba9\u5b50\u8fdb\u7a0b\u9000\u51fa&#xff0c;\u9000\u51fa\u7801\u4e3a1<\/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 keyword\">else<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;I am parent, pid is %d\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">getpid<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><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 class-name\">pid_t<\/span> rid <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">wait<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>status<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>rid <span class=\"token operator\">&#061;&#061;<\/span> pid<span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n<span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;wait success, rid: %d, status: %d\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> rid<span class=\"token punctuation\">,<\/span> status<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <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<p>\u8fd0\u884c\u7ed3\u679c&#xff1a; <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250526231249-6834f571339b1.png\" alt=\"QQ20250525-164901\" \/><\/p>\n<p>\u53ef\u4ee5\u770b\u5230&#xff0c;\u6211\u4eec\u7684wait\u51fd\u6570\u4e5f\u662f\u6210\u529f\u7684\u7b49\u5f85\u5230\u4e86\u5b50\u8fdb\u7a0b&#xff0c;\u81f3\u4e8e\u9000\u51fa\u7801\u6211\u4eec\u8bbe\u7f6e\u7684\u662f1&#xff0c;\u90a3\u4e48\u4e3a\u4ec0\u4e48\u6253\u5370\u51fa\u6765\u7684\u7ed3\u679c\u662f256&#xff0c;\u6211\u4eec\u4e0b\u9762\u518d\u8bf4\u3002<\/p>\n<h5>3.2.2 waitpid\u65b9\u6cd5<\/h5>\n<p>\u6211\u4eec\u77e5\u9053&#xff0c;wait\u51fd\u6570\u53ea\u80fd\u7b49\u5f85\u6700\u5148\u7ed3\u675f\u7684\u5b50\u8fdb\u7a0b&#xff0c;\u90a3\u4e48\u5982\u679c\u4e00\u4e2a\u7236\u8fdb\u7a0b\u6709\u591a\u4e2a\u5b50\u8fdb\u7a0b&#xff0c;\u7236\u8fdb\u7a0b\u8be5\u5982\u4f55\u53bb\u7b49\u5f85\u7279\u5b9a\u7684\u5b50\u8fdb\u7a0b\u5462&#xff1f;\u8fd9\u65f6\u6211\u4eec\u5c31\u53ef\u4ee5\u4f7f\u7528waitpid\u51fd\u6570&#xff1a;<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250526231249-6834f57140c28.png\" alt=\"QQ20250525-165402\" \/><\/p>\n<p>\u5982\u679c\u4f60\u9700\u8981\u7236\u8fdb\u7a0b\u7b49\u5f85\u7279\u5b9a\u5b50\u8fdb\u7a0b&#xff08;\u800c\u4e0d\u662f\u4efb\u610f\u4e00\u4e2a\u6700\u5148\u7ec8\u6b62\u7684\u5b50\u8fdb\u7a0b&#xff09;&#xff0c;\u53ef\u4ee5\u4f7f\u7528 waitpid \u51fd\u6570&#xff0c;\u800c\u4e0d\u662f wait\u51fd\u6570\u3002waitpid \u5141\u8bb8\u6307\u5b9a\u5b50\u8fdb\u7a0b\u7684 PID&#xff0c;\u4ece\u800c\u7cbe\u786e\u63a7\u5236\u7b49\u5f85\u7684\u76ee\u6807\u3002<\/p>\n<p>\u53ef\u4ee5\u770b\u5230waitpid\u51fd\u6570\u6709\u4e09\u4e2a\u53c2\u6570&#xff1a;<\/p>\n<p>pid&#xff1a;\u6307\u5b9a\u8981\u7b49\u5f85\u7684\u8fdb\u7a0b&#xff1a;<\/p>\n<ul>\n<li>pid &gt; 0&#xff1a;\u7b49\u5f85\u6307\u5b9a\u7684\u5b50\u8fdb\u7a0b\u7684pid\u3002<\/li>\n<li>pid &#061;&#061; -1&#xff1a;\u7b49\u5f85\u4efb\u610f\u5b50\u8fdb\u7a0b&#xff08;\u884c\u4e3a\u7c7b\u4f3cwait&#xff09;\u3002<\/li>\n<li>pid &#061;&#061; 0&#xff1a;\u7b49\u5f85\u540c\u4e00\u8fdb\u7a0b\u7ec4\u4e2d\u7684\u4efb\u610f\u5b50\u8fdb\u7a0b\u3002<\/li>\n<li>pid &lt; -1&#xff1a;\u7b49\u5f85\u8fdb\u7a0b\u7ec4ID\u4e3a|pid|\u7684\u4efb\u610f\u5b50\u8fdb\u7a0b\u3002<\/li>\n<\/ul>\n<p>status&#xff1a;\u5b58\u50a8\u5b50\u8fdb\u7a0b\u7684\u9000\u51fa\u72b6\u6001\u3002<\/p>\n<p>options&#xff1a;\u63a7\u5236\u7b49\u5f85\u884c\u4e3a&#xff1a;<\/p>\n<ul>\n<li>0&#xff1a;\u963b\u585e\u7b49\u5f85&#xff08;\u548cwait\u76f8\u540c&#xff09;\u3002<\/li>\n<li>WNOHANG&#xff1a;\u975e\u963b\u585e\u7b49\u5f85&#xff0c;\u82e5pid\u6307\u5b9a\u7684\u2f26\u8fdb\u7a0b\u6ca1\u6709\u7ed3\u675f&#xff0c;\u5219waitpid()\u51fd\u6570\u8fd4\u56de0&#xff0c;\u4e0d\u4e88\u4ee5\u7b49\u5f85\u3002\u82e5\u6b63\u5e38\u7ed3\u675f&#xff0c;\u5219\u8fd4\u56de\u8be5\u2f26\u8fdb\u7a0b\u7684pid\u3002<\/li>\n<\/ul>\n<p>\u5bf9\u4e8e\u975e\u963b\u585e\u7b49\u5f85&#xff0c;\u5982\u679c\u76ee\u6807\u5b50\u8fdb\u7a0b\u5c1a\u672a\u7ec8\u6b62&#xff0c;waitpid \u8fd4\u56de 0&#xff0c;\u7236\u8fdb\u7a0b\u53ef\u4ee5\u7ee7\u7eed\u5176\u4ed6\u5de5\u4f5c\u3002\u901a\u5e38\u91c7\u7528\u5faa\u73af\u68c0\u67e5&#xff0c;\u76f4\u5230\u76ee\u6807\u5b50\u8fdb\u7a0b\u7ec8\u6b62&#xff0c;\u8fd9\u79cd\u65b9\u5f0f\u53eb\u505a\u975e\u963b\u585e\u8f6e\u8be2\u3002<\/p>\n<p>\u5982\u4f55\u4f7f\u7236\u8fdb\u7a0b\u8fdb\u884c\u5176\u4ed6\u5de5\u4f5c\u5462&#xff1f;\u6211\u4eec\u53ef\u4ee5\u91c7\u7528\u51fd\u6570\u8c03\u7528\u7684\u65b9\u5f0f<\/p>\n<p>waitpid\u7684\u8fd4\u56de\u503c&#xff1a;\u5f53\u6b63\u5e38\u8fd4\u56de\u7684\u65f6\u5019waitpid\u8fd4\u56de\u6536\u96c6\u5230\u7684\u2f26\u8fdb\u7a0b\u7684pid&#xff1b;\u5982\u679c\u8bbe\u7f6e\u4e86\u9009\u9879WNOHANG&#xff0c;\u2f7d\u8c03\u2f64\u4e2dwaitpid\u53d1\u73b0\u6ca1\u6709\u5df2\u9000\u51fa\u7684\u2f26\u8fdb\u7a0b\u53ef\u6536\u96c6&#xff0c;\u5219\u8fd4\u56de0&#xff1b;\u5982\u679c\u8c03\u2f64\u4e2d\u51fa\u9519,\u5219\u8fd4\u56de-1&#xff0c;\u8fd9\u65f6errno\u4f1a\u88ab\u8bbe\u7f6e\u6210\u76f8\u5e94\u7684\u503c\u4ee5\u6307\u2f70\u9519\u8bef\u6240\u5728&#xff08;\u5982 ECHILD \u8868\u793a\u65e0\u5b50\u8fdb\u7a0b&#xff0c;EINTR \u8868\u793a\u88ab\u4fe1\u53f7\u4e2d\u65ad&#xff09;\u3002<\/p>\n<p>\u4e0b\u9762\u8ba9\u6211\u4eec\u770b\u4e00\u770bwaitpid\u7684\u4f7f\u7528&#xff1a;<\/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;stdio.h&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;stdlib.h&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><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\/wait.h&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;errno.h&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;string.h&gt;<\/span><\/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> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">pid_t<\/span> pids<span class=\"token punctuation\">[<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> i<span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u521b\u5efa\u4e09\u4e2a\u5b50\u8fdb\u7a0b<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span>i <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span> i <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">;<\/span> i<span class=\"token operator\">&#043;&#043;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        pids<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">fork<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>pids<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;fork failed&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>pids<span class=\"token punctuation\">[<\/span>i<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token comment\">\/\/ \u5b50\u8fdb\u7a0b<\/span><br \/>\n            <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Child %d (PID: %d)&#034;<\/span><span class=\"token punctuation\">,<\/span> i<span class=\"token punctuation\">,<\/span> <span class=\"token function\">getpid<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token function\">exit<\/span><span class=\"token punctuation\">(<\/span>i <span class=\"token operator\">&#043;<\/span> <span class=\"token number\">100<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u9000\u51fa\u7801\u4e3a 100, 101, 102<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token function\">sleep<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u7236\u8fdb\u7a0b\u7b49\u5f85\u7279\u5b9a\u5b50\u8fdb\u7a0b&#xff08;\u4f8b\u5982&#xff0c;\u7b2c\u4e8c\u4e2a\u5b50\u8fdb\u7a0b&#xff0c;\u7d22\u5f15 1&#xff09;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> status<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token class-name\">pid_t<\/span> target_pid <span class=\"token operator\">&#061;<\/span> pids<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u7b49\u5f85\u7b2c\u4e8c\u4e2a\u5b50\u8fdb\u7a0b<\/span><br \/>\n    <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Waiting for Child 1 (PID: %d)\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> target_pid<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token class-name\">pid_t<\/span> result <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">waitpid<\/span><span class=\"token punctuation\">(<\/span>target_pid<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>status<span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ \u963b\u585e\u7b49\u5f85\u7279\u5b9a PID<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>result <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>errno <span class=\"token operator\">&#061;&#061;<\/span> ECHILD<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;No such child process: %s\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token function\">strerror<\/span><span class=\"token punctuation\">(<\/span>errno<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;waitpid failed&#034;<\/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\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token function\">WIFEXITED<\/span><span class=\"token punctuation\">(<\/span>status<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Child (PID: %d) exited with status %d\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span> result<span class=\"token punctuation\">,<\/span> <span class=\"token function\">WEXITSTATUS<\/span><span class=\"token punctuation\">(<\/span>status<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <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<p>\u8fd0\u884c\u7ed3\u679c&#xff1a;<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250526231249-6834f5715b838.png\" alt=\"QQ20250525-173921\" \/><\/p>\n<h4>3.3 \u83b7\u5f97\u5b50\u8fdb\u7a0bstatus<\/h4>\n<p>\u6211\u4eec\u77e5\u9053\u5728wait\u548cwaitpid\u4e2d\u90fd\u6709\u2f00\u4e2aint *status\u7684\u53c2\u6570&#xff0c;\u8be5\u53c2\u6570\u662f\u2f00\u4e2a\u8f93\u51fa\u578b\u53c2\u6570&#xff0c;\u7531\u64cd\u4f5c\u7cfb\u7edf\u586b\u5145\u3002\u5982\u679c\u4f20\u9012NULL&#xff0c;\u5219\u8868\u793a\u4e0d\u5173\u5fc3\u5b50\u8fdb\u7a0b\u7684\u9000\u51fa\u72b6\u6001\u4fe1\u606f&#xff0c;\u5426\u5219OS\u4f1a\u6839\u636e\u8be5\u53c2\u6570\u5c06\u5b50\u8fdb\u7a0b\u7684\u9000\u51fa\u4fe1\u606f\u53cd\u9988\u7ed9\u7236\u8fdb\u7a0b\u3002<\/p>\n<p>\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\u6211\u4eec\u53d1\u73b0\u83b7\u53d6\u5230\u4e86\u5b50\u8fdb\u7a0b\u7684\u9000\u51fa\u4fe1\u606f\u540estatus\u7684\u503c\u4e0e\u6211\u4eec\u7684\u9884\u671f\u4e0d\u540c&#xff0c;\u90a3\u4e48\u8fd9\u662f\u4e3a\u4ec0\u4e48\u5462&#xff1f;status\u4e0d\u80fd\u7b80\u5355\u7684\u5f53\u4f5c\u6574\u5f62\u6765\u770b\u5f85&#xff0c;\u6211\u4eec\u8981\u628a\u5b83\u5f53\u4f5c\u4f4d\u56fe\u6765\u770b\u5f85&#xff08;\u53ea\u7814\u7a76status\u4f4e16\u4f4d&#xff09;&#xff1a; <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250526231249-6834f5716a8a3.png\" alt=\"QQ20250525-174830\" \/><\/p>\n<p>\u4e5f\u5c31\u662f\u8bf4\u5f53\u6211\u4eec\u7684\u7a0b\u5e8f\u6b63\u5e38\u7ec8\u6b62\u540e&#xff0c;\u9000\u51fa\u72b6\u6001&#xff0c;\u4e5f\u5c31\u662f\u9000\u51fa\u7801\u4fdd\u5b58\u5728status\u7684\u7b2c\u5341\u516d\u4f4d\u7684\u9ad8\u516b\u4f4d\u4e2d&#xff1b;\u82e5\u662f\u5f02\u5e38\u7ec8\u6b62&#xff0c;status\u4f1a\u4fdd\u5b58\u5f02\u5e38\u65f6\u5bf9\u5e94\u7684\u4fe1\u53f7\u7f16\u53f7&#xff0c;\u4fdd\u5b58\u5728status\u7684\u4f4e\u4e03\u4f4d\u4e2d&#xff0c;\u8fd9\u65f6\u9000\u51fa\u7801\u5c31\u6ca1\u6709\u4e86\u610f\u4e49\u3002<\/p>\n<p>\u5728C\u8bed\u8a00\u7684\u6807\u51c6\u5e93\u4e2d&#xff0c;\u6709\u4e13\u95e8\u7684\u5b8f\u7528\u6765\u8f6c\u6362status&#xff0c;\u6765\u83b7\u5f97\u6211\u4eec\u60f3\u8981\u7684\u4fe1\u606f&#xff1a;<\/p>\n<ul>\n<li>WIFEXITED(status)&#xff1a; \u82e5\u4e3a\u6b63\u5e38\u7ec8\u2f4c\u2f26\u8fdb\u7a0b\u8fd4\u56de\u7684\u72b6\u6001&#xff0c;\u5219\u4e3a\u771f\u3002&#xff08;\u67e5\u770b\u8fdb\u7a0b\u662f\u5426\u662f\u6b63\u5e38\u9000\u51fa&#xff09;<\/li>\n<li>WEXITSTATUS(status)&#xff1a; \u82e5WIFEXITED\u2fae\u96f6&#xff0c;\u63d0\u53d6\u2f26\u8fdb\u7a0b\u9000\u51fa\u7801\u3002&#xff08;\u67e5\u770b\u8fdb\u7a0b\u7684\u9000\u51fa\u7801&#xff09;<\/li>\n<\/ul>\n<p>\u6240\u4ee5\u7236\u8fdb\u7a0b\u4e3a\u4ec0\u4e48\u8981\u8fdb\u884c\u7b49\u5f85&#xff1f;\u6700\u91cd\u8981\u7684\u5c31\u662f\u56de\u6536\u5b50\u8fdb\u7a0b\u8d44\u6e90&#xff0c;\u907f\u514d\u5185\u5b58\u6cc4\u6f0f&#xff1b;\u540c\u65f6\u4e5f\u53ef\u4ee5\u53bb\u83b7\u53d6\u5b50\u8fdb\u7a0b\u7684\u9000\u51fa\u4fe1\u606f&#xff0c;\u8fd9\u4e5f\u662f\u50f5\u5c38\u72b6\u6001\u5b58\u5728\u7684\u610f\u4e49\u3002<\/p>\n<h3>4. \u8fdb\u7a0b\u66ff\u6362<\/h3>\n<p>\u5f53\u6211\u4eec\u4f7f\u7528fork\u51fd\u6570\u521b\u5efa\u4e86\u5b50\u8fdb\u7a0b\u540e&#xff0c;\u2f57\u2f26\u8fdb\u7a0b\u5404\u2f83\u6267\u2f8f\u2f57\u8fdb\u7a0b\u4ee3\u7801\u7684\u2f00\u90e8\u5206&#xff0c;\u5982\u679c\u2f26\u8fdb\u7a0b\u5c31\u60f3\u6267\u2f8f\u2f00\u4e2a\u5168\u65b0\u7684\u7a0b\u5e8f\u5462&#xff1f;\u8fd9\u65f6\u5c31\u9700\u8981\u901a\u8fc7\u7a0b\u5e8f\u66ff\u6362\u6765\u5b8c\u6210\u8fd9\u4e2a\u529f\u80fd&#xff01;<\/p>\n<p>\u7a0b\u5e8f\u66ff\u6362\u662f\u901a\u8fc7\u7279\u5b9a\u7684\u63a5\u2f1d&#xff0c;\u5c06\u78c1\u76d8\u4e0a\u7684\u2f00\u4e2a\u5168\u65b0\u7684\u7a0b\u5e8f(\u4ee3\u7801\u548c\u6570\u636e)\u52a0\u8f7d\u5230\u8c03\u2f64\u8fdb\u7a0b\u7684\u5730\u5740\u7a7a\u95f4\u4e2d&#xff01;<\/p>\n<h4>4.1 \u66ff\u6362\u539f\u7406<\/h4>\n<p>\u5728Linux\u7cfb\u7edf\u4e2d&#xff0c;\u8fdb\u7a0b\u66ff\u6362\u4e3b\u8981\u901a\u8fc7exec\u7cfb\u5217\u51fd\u6570\u5b9e\u73b0\u3002\u2f64fork\u521b\u5efa\u2f26\u8fdb\u7a0b\u540e\u6267\u2f8f\u7684\u662f\u548c\u2f57\u8fdb\u7a0b\u76f8\u540c\u7684\u7a0b\u5e8f(\u4f46\u6709\u53ef\u80fd\u6267\u2f8f\u4e0d\u540c\u7684\u4ee3\u7801\u5206\u2f40)&#xff0c;\u5b50\u8fdb\u7a0b\u5f80\u5f80\u8981\u8c03\u2f64exec\u7cfb\u5217\u51fd\u6570\u4ee5\u6267\u2f8f\u53e6\u2f00\u4e2a\u7a0b\u5e8f\u3002\u5f53\u8fdb\u7a0b\u8c03\u2f64exec\u7cfb\u5217\u51fd\u6570\u65f6&#xff0c;\u8be5\u8fdb\u7a0b\u7684\u7269\u7406\u5185\u5b58\u7a7a\u95f4\u7684\u4ee3\u7801\u548c\u6570\u636e\u5b8c\u5168\u88ab\u65b0\u7a0b\u5e8f\u66ff\u6362&#xff0c;\u4ece\u65b0\u7a0b\u5e8f\u7684\u542f\u52a8\u4f8b\u7a0b\u5f00\u59cb\u6267\u2f8f\u3002\u8c03\u2f64exec\u7cfb\u5217\u51fd\u6570\u5e76\u4e0d\u521b\u5efa\u65b0\u8fdb\u7a0b&#xff0c;\u6240\u4ee5\u8c03\u2f64exec\u7cfb\u5217\u51fd\u6570\u524d\u540e\u8be5\u8fdb\u7a0b\u7684pid\u5e76\u672a\u6539\u53d8\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-05-27zwffcmzvofe.png\" alt=\"QQ20250525-181229\" \/><\/p>\n<p>\u4e00\u65e6\u7a0b\u5e8f\u66ff\u6362\u6210\u529f&#xff0c;\u5b50\u8fdb\u7a0b\u5c31\u53bb\u6267\u884c\u65b0\u7684\u4ee3\u7801\u4e86&#xff0c;\u539f\u59cb\u4ee3\u7801\u7684\u540e\u534a\u90e8\u5206\u5df2\u7ecf\u4e0d\u5b58\u5728\u4e86&#xff0c;\u6240\u4ee5\u5bf9\u4e8eexec\u7cfb\u5217\u51fd\u6570\u6765\u8bf4&#xff0c;\u53ea\u6709\u5931\u8d25\u7684\u8fd4\u56de\u503c&#xff0c;\u6ca1\u6709\u6210\u529f\u7684\u8fd4\u56de\u503c\u3002\u53ea\u8981\u6709\u8fd4\u56de\u503c&#xff0c;\u5c31\u4ee3\u8868\u7740\u66ff\u6362\u5931\u8d25\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-05-27cjpjvrtagfr.png\" alt=\"QQ20250525-181437\" \/><\/p>\n<h4>4.2 \u66ff\u6362\u51fd\u6570<\/h4>\n<p>exec\u7cfb\u5217\u51fd\u6570\u6709\u516d\u79cd&#xff0c;\u5b83\u4eec\u90fd\u4ee5exec\u5f00\u5934&#xff0c;\u6240\u4ee5\u7edf\u79f0\u4e3aexec\u51fd\u6570&#xff1a;<\/p>\n<p><img decoding=\"async\" src=\"2025-05-27sndjjxhagpe.png\" alt=\"QQ20250525-182458\" \/><\/p>\n<p>\u8fd9\u4e9b\u51fd\u6570\u539f\u578b\u770b\u8d77\u6765\u5f88\u5bb9\u6613\u6df7,\u4f46\u53ea\u8981\u638c\u63e1\u4e86\u89c4\u5f8b\u5c31\u5f88\u597d\u8bb0\u3002<\/p>\n<ul>\n<li>l(list) : \u8868\u2f70\u53c2\u6570\u91c7\u2f64\u5217\u8868\u7684\u5f62\u5f0f\u4f20\u3002<\/li>\n<li>v(vector) : \u8868\u793a\u53c2\u6570\u91c7\u2f64\u6570\u7ec4\u7684\u5f62\u5f0f\u4f20\u3002<\/li>\n<li>p(path) : \u8868\u793a\u5728PATH\u73af\u5883\u53d8\u91cf\u4e2d\u641c\u7d22\u53ef\u6267\u884c\u6587\u4ef6<\/li>\n<li>e(env) : \u8868\u2f70\u53ef\u4ee5\u6307\u5b9a\u73af\u5883\u53d8\u91cf<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"2025-05-27bulpsp12ycv.png\" alt=\"QQ20250525-190152\" \/><\/p>\n<p>\u4e8b\u5b9e\u4e0a,\u53ea\u6709execve\u662f\u771f\u6b63\u7684\u7cfb\u7edf\u8c03\u2f64,\u5176\u5b83\u4e94\u4e2a\u51fd\u6570\u6700\u7ec8\u90fd\u8c03\u2f64execve&#xff0c;\u6240\u4ee5execve\u5728man\u2f3f\u518c \u7b2c2\u8282,\u5176\u5b83\u51fd\u6570\u5728man\u2f3f\u518c\u7b2c3\u8282\u3002<\/p>\n<p><img decoding=\"async\" src=\"2025-05-27ycb1hry2h2d.png\" alt=\"QQ20250525-190416\" \/><\/p>\n<p>\u8fd9\u4e9b\u51fd\u6570\u4e4b\u95f4\u7684\u5173\u7cfb\u5982\u4e0b\u56fe\u6240\u2f70&#xff1a;<\/p>\n<p><img decoding=\"async\" src=\"2025-05-27wmtlzipixnh.png\" alt=\"QQ20250525-191034\" \/><\/p>\n<p>\u4e0b\u9762\u8ba9\u6211\u4eec\u6765\u770b\u4e00\u770b\u8fd9\u4e9bexec\u51fd\u6570\u7684\u793a\u4f8b&#xff1a;<\/p>\n<ul>\n<li>\n<p>int execl(const char *path, const char *arg, &#8230;); &#xff1a;<\/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;unistd.h&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;stdio.h&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;stdlib.h&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;sys\/wait.h&gt;<\/span><\/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> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">pid_t<\/span> pid <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">fork<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>pid <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u5b50\u8fdb\u7a0b&#xff1a;\u66ff\u6362\u4e3als\u547d\u4ee4<\/span><br \/>\n        <span class=\"token function\">execl<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\/bin\/ls&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;ls&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;-l&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;\/home&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u5982\u679cexecl\u6210\u529f&#xff0c;\u4e0b\u9762\u7684\u4ee3\u7801\u4e0d\u4f1a\u6267\u884c<\/span><br \/>\n        <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;execl failed&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/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> <span class=\"token keyword\">else<\/span> <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>pid <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u7236\u8fdb\u7a0b&#xff1a;\u7b49\u5f85\u5b50\u8fdb\u7a0b\u7ed3\u675f<\/span><br \/>\n        <span class=\"token function\">wait<\/span><span class=\"token punctuation\">(<\/span><span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Child process finished\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;fork failed&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <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<p>\u5bf9\u4e8eexecl\u51fd\u6570&#xff0c;\u7b2c\u4e00\u4e2a\u53c2\u6570\u7684\u542b\u4e49\u662f\u6211\u4eec\u8981\u6267\u884c\u8c01&#xff0c;\u5269\u4e0b\u7684\u53c2\u6570\u7684\u542b\u4e49\u662f\u6211\u4eec\u50cf\u600e\u4e48\u53bb\u6267\u884c\u5b83&#xff0c;\u8fd9\u4e5f\u5c31\u5bf9\u5e94\u4e86\u6211\u4eec\u5728\u547d\u4ee4\u884c\u4e0a\u6267\u884c\u547d\u4ee4\u7684\u64cd\u4f5c&#xff0c;\u547d\u4ee4\u7684\u540d\u79f0\u4ee5\u53ca\u76f8\u5e94\u7684\u9009\u9879\u3002\u4f7f\u7528\u5e26l\u7684exec\u51fd\u6570\u65f6&#xff0c;\u4f20\u53c2\u65f6\u6211\u4eec\u6700\u540e\u9700\u8981\u4ee5NULL\u4e3a\u7ed3\u5c3e&#xff0c;\u4ee3\u8868\u6211\u4eec\u7684\u53c2\u6570\u4f20\u9012\u5b8c\u6bd5\u3002\u6211\u4eec\u5728\u547d\u4ee4\u884c\u4e0a\u662f\u5982\u4f55\u4f7f\u7528\u547d\u4ee4\u7684&#xff0c;\u5c31\u5982\u4f55\u53bb\u4f20\u53c2\u6570\u3002\u4e0b\u9762\u8ba9\u6211\u4eec\u6765\u770b\u4e00\u4e0b\u8fd0\u884c\u7ed3\u679c&#xff1a; <img decoding=\"async\" src=\"2025-05-27kwfqdo3n4d2.png\" alt=\"QQ20250525-192000\" \/><\/p>\n<\/li>\n<li>\n<p>int execv(const char *path, char *const argv[]); &#xff1a;<\/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;unistd.h&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;stdio.h&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;stdlib.h&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;sys\/wait.h&gt;<\/span><\/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> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">pid_t<\/span> pid <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">fork<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>pid <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u5b50\u8fdb\u7a0b&#xff1a;\u4f7f\u7528\u6570\u7ec4\u4f20\u9012\u53c2\u6570<\/span><br \/>\n        <span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span>argv<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;ls&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;-l&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">execv<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\/bin\/ls&#034;<\/span><span class=\"token punctuation\">,<\/span> argv<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;execv failed&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/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> <span class=\"token keyword\">else<\/span> <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>pid <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">wait<\/span><span class=\"token punctuation\">(<\/span><span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Child process finished\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;fork failed&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <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<p>\u5bf9\u4e8e\u5e26v\u7684exec\u51fd\u6570&#xff0c;\u6211\u4eec\u53ea\u9700\u5c06\u4f20\u9012\u9009\u9879\u7684\u53c2\u6570\u901a\u8fc7\u4e00\u4e2a\u6307\u9488\u6570\u7ec4\u6765\u63d0\u4f9b\u5373\u53ef\u3002\u4e0b\u9762\u6765\u770b\u8fd0\u884c\u7ed3\u679c&#xff1a; <img decoding=\"async\" src=\"2025-05-274b3aimatedj.png\" alt=\"QQ20250525-192437\" \/><\/p>\n<\/li>\n<li>\n<p>int execlp(const char *file, const char *arg, &#8230;);<\/p>\n<p>int execvp(const char *file, char *const argv[]);<\/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;unistd.h&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;stdio.h&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;stdio.h&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;sys\/wait.h&gt;<\/span><\/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> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">pid_t<\/span> pid <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">fork<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>pid <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u4e0d\u9700\u8981\u5b8c\u6574\u8def\u5f84&#xff0c;\u5728PATH\u4e2d\u641c\u7d22<\/span><br \/>\n        <span class=\"token function\">execlp<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;ls&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;ls&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;-l&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;execlp failed&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/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> <span class=\"token keyword\">else<\/span> <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>pid <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">wait<\/span><span class=\"token punctuation\">(<\/span><span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Child process finished\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;fork failed&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <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<p>\u5bf9\u4e8e\u5e26p\u7684exec\u51fd\u6570&#xff0c;\u6211\u4eec\u7b2c\u4e00\u4e2a\u53c2\u6570\u53ea\u9700\u8981\u4f20\u5165\u9700\u8981\u6267\u884c\u7684\u7a0b\u5e8f\u540d\u5373\u53ef&#xff0c;\u4e0d\u7528\u5e26\u8def\u5f84&#xff0c;\u5b83\u4f1a\u81ea\u52a8\u5728PATH\u73af\u5883\u53d8\u91cf\u4e2d\u641c\u7d22\u3002<\/p>\n<\/li>\n<li>\n<p>int execle(const char *path, const char *arg, &#8230;,char *const envp[]);<\/p>\n<p>int execve(const char *path, char *const argv[], char *const envp[]);<\/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;unistd.h&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;stdio.h&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;stdlib.h&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;sys\/wait.h&gt;<\/span><\/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> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">pid_t<\/span> pid <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">fork<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>pid <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ \u5b50\u8fdb\u7a0b&#xff1a;\u4f20\u9012\u73af\u5883\u53d8\u91cf\u8868<\/span><br \/>\n        <span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span>argv<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;ls&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;-l&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span>env<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">char<\/span> <span class=\"token operator\">*<\/span><span class=\"token keyword\">const<\/span><span class=\"token punctuation\">)<\/span><span class=\"token string\">&#034;MYVAL&#061;123456&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token constant\">NULL<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">execve<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\/bin\/ls&#034;<\/span><span class=\"token punctuation\">,<\/span> argv<span class=\"token punctuation\">,<\/span> env<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;execv failed&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/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> <span class=\"token keyword\">else<\/span> <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>pid <span class=\"token operator\">&gt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">wait<\/span><span class=\"token punctuation\">(<\/span><span class=\"token constant\">NULL<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">printf<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Child process finished\\\\n&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;fork failed&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <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<p>\u5bf9\u4e0e\u5e26e\u7684exec\u51fd\u6570&#xff0c;\u6211\u4eec\u9700\u8981\u7ed9\u5b83\u4f20\u5165\u73af\u5883\u53d8\u91cf\u8868&#xff08;\u5176\u4ed6\u7684\u90fd\u662f\u4f7f\u7528\u7684\u7ee7\u627f\u7236\u8fdb\u7a0b\u7684\u73af\u5883\u53d8\u91cf\u8868&#xff09;\u3002\u6211\u4eec\u5982\u679c\u8981\u4f20\u5165\u73af\u5883\u53d8\u91cf&#xff0c;\u90a3\u4e48\u6211\u4eec\u7684\u76ee\u6807\u5b50\u8fdb\u7a0b\u5c31\u4f1a\u5c06\u4e4b\u524d\u4ece\u7236\u8fdb\u7a0b\u7ee7\u627f\u7684\u73af\u5883\u53d8\u91cf\u8868\u66ff\u6362\u6210\u4f20\u5165\u7684\u65b0\u7684\u73af\u5883\u53d8\u91cf\u8868\u3002\u5f88\u663e\u7136\u8fd9\u5e76\u4e0d\u7b26\u5408\u6211\u4eec\u7684\u9884\u671f&#xff0c;\u56e0\u4e3a\u6211\u4eec\u901a\u5e38\u662f\u5bf9\u4e8e\u5b50\u8fdb\u7a0b\u65b0\u589e\u4e00\u4e9b\u73af\u5883\u53d8\u91cf&#xff0c;\u800c\u4e0d\u662f\u8986\u76d6&#xff0c;\u90a3\u4e48\u8be5\u600e\u4e48\u505a\u5462&#xff1f;\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7putenv\u51fd\u6570\u6765\u5bfc\u5165\u65b0\u7684\u73af\u5883\u53d8\u91cf<img decoding=\"async\" src=\"2025-05-27qgl00dtp5l2.png\" alt=\"QQ20250525-195205\" 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