{"id":91792,"date":"2026-08-08T13:17:26","date_gmt":"2026-08-08T05:17:26","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/91792.html"},"modified":"2026-08-08T13:17:26","modified_gmt":"2026-08-08T05:17:26","slug":"%e3%80%90linux%e3%80%91%e8%bf%9b%e7%a8%8b%e4%b8%ba%e4%bb%80%e4%b9%88%e4%b8%8d%e8%83%bd%e7%9b%b4%e6%8e%a5%e9%80%9a%e4%bf%a1%ef%bc%9f%e5%8c%bf%e5%90%8d%e7%ae%a1%e9%81%93%e5%8e%9f%e7%90%86%e3%80%81fd","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/91792.html","title":{"rendered":"\u3010Linux\u3011\u8fdb\u7a0b\u4e3a\u4ec0\u4e48\u4e0d\u80fd\u76f4\u63a5\u901a\u4fe1\uff1f\u533f\u540d\u7ba1\u9053\u539f\u7406\u3001fd \u7ee7\u627f\u4e0e\u8bfb\u5199\u89c4\u5219"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260808051723-6a76bbe3e0516.png\" alt=\"\u5c01\u9762\" \/><\/p>\n<p>&#x1f525;\u4e2a\u4eba\u4e3b\u9875&#xff1a;<font color=\"whiblue\">\u7231\u548c\u51b0\u9614\u4e50<\/font> &#x1f4da;\u4e13\u680f\u4f20\u9001\u95e8&#xff1a;\u300a\u6570\u636e\u7ed3\u6784\u4e0e\u7b97\u6cd5\u300b \u3001C&#043;&#043; &#x1f436;\u5b66\u4e60\u65b9\u5411&#xff1a;<font color=\"red\">C&#043;&#043;\u65b9\u5411\u5b66\u4e60\u7231\u597d\u8005<\/font> \u2b50\u4eba\u751f\u683c\u8a00&#xff1a;<font color=\"whiblue\">\u5f97\u77e5\u5766\u7136 &#xff0c;\u5931\u4e4b\u6de1\u7136 <\/font><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260808051724-6a76bbe420d8b.gif\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/><\/p>\n<hr \/>\n<p>&#x1f3e0;\u535a\u4e3b\u7b80\u4ecb <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260808051724-6a76bbe42ce37.gif\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> <\/p>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>\u524d\u8a00<\/li>\n<li>\u4e00\u3001\u8fdb\u7a0b\u4e3a\u4ec0\u4e48\u4e0d\u80fd\u76f4\u63a5\u901a\u4fe1<\/li>\n<li>\n<ul>\n<li>1.1 \u8fdb\u7a0b\u4e3a\u4ec0\u4e48\u4e0d\u80fd\u76f4\u63a5\u628a\u6570\u636e\u4ea4\u7ed9\u5bf9\u65b9<\/li>\n<li>1.2 IPC \u7684\u542b\u4e49<\/li>\n<li>1.3 \u64cd\u4f5c\u7cfb\u7edf\u4e3a\u4ec0\u4e48\u8981\u63d0\u4f9b\u7cfb\u7edf\u8c03\u7528<\/li>\n<\/ul>\n<\/li>\n<li>\u4e8c\u3001\u533f\u540d\u7ba1\u9053\u5230\u5e95\u662f\u4ec0\u4e48<\/li>\n<li>\n<ul>\n<li>2.1 \u4ec0\u4e48\u662f\u7ba1\u9053<\/li>\n<li>2.2 &#096;pipe()&#096; \u8fd4\u56de\u7684\u4e24\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26<\/li>\n<li>2.3 &#096;fork()&#096; \u540e\u4e3a\u4ec0\u4e48\u7236\u5b50\u8fdb\u7a0b\u80fd\u8bbf\u95ee\u540c\u4e00\u6761\u7ba1\u9053<\/li>\n<li>2.4 \u4e3a\u4ec0\u4e48\u5fc5\u987b\u5173\u95ed\u4e0d\u9700\u8981\u7684\u7aef<\/li>\n<\/ul>\n<\/li>\n<li>\u4e09\u3001\u5148\u628a\u6700\u5c0f Demo \u8dd1\u8d77\u6765<\/li>\n<li>\n<ul>\n<li>3.1 \u521b\u5efa\u7ba1\u9053\u548c\u5b50\u8fdb\u7a0b<\/li>\n<li>3.2 \u6570\u636e\u4e3a\u4ec0\u4e48\u662f\u201c\u8bfb\u540e\u6d88\u8d39\u201d<\/li>\n<\/ul>\n<\/li>\n<li>\u56db\u3001\u7ba1\u9053\u771f\u6b63\u5bb9\u6613\u8e29\u5751\u7684\u8bfb\u5199\u89c4\u5219<\/li>\n<li>\n<ul>\n<li>4.1 \u533f\u540d\u7ba1\u9053\u7684\u51e0\u4e2a\u7279\u70b9<\/li>\n<li>\n<ul>\n<li>1. \u5e38\u7528\u4e8e\u5177\u6709\u4eb2\u7f18\u5173\u7cfb\u7684\u8fdb\u7a0b<\/li>\n<li>2. \u7ba1\u9053\u81ea\u5e26\u540c\u6b65\u5173\u7cfb<\/li>\n<li>3. \u7ba1\u9053\u9762\u5411\u5b57\u8282\u6d41<\/li>\n<li>4. \u4e00\u6761\u7ba1\u9053\u53ea\u63d0\u4f9b\u4e00\u4e2a\u6570\u636e\u65b9\u5411<\/li>\n<li>5. \u751f\u547d\u5468\u671f\u7531\u6240\u6709\u5f15\u7528\u5171\u540c\u51b3\u5b9a<\/li>\n<\/ul>\n<\/li>\n<li>4.2 \u56db\u79cd\u5178\u578b\u60c5\u51b5<\/li>\n<li>\n<ul>\n<li>\u60c5\u51b5\u4e00&#xff1a;\u5199\u7aef\u6b63\u5e38&#xff0c;\u4f46\u6682\u65f6\u6ca1\u6709\u6570\u636e<\/li>\n<li>\u60c5\u51b5\u4e8c&#xff1a;\u8bfb\u7aef\u6b63\u5e38&#xff0c;\u4f46\u7ba1\u9053\u5df2\u7ecf\u5199\u6ee1<\/li>\n<li>\u60c5\u51b5\u4e09&#xff1a;\u6240\u6709\u5199\u7aef\u5173\u95ed&#xff0c;\u8bfb\u7aef\u7ee7\u7eed\u8bfb\u53d6<\/li>\n<li>\u60c5\u51b5\u56db&#xff1a;\u6240\u6709\u8bfb\u7aef\u5173\u95ed&#xff0c;\u5199\u7aef\u7ee7\u7eed\u5199<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>\u4e94\u3001\u7ba1\u9053\u5bb9\u91cf\u548c &#096;PIPE_BUF&#096; \u522b\u6df7\u5728\u4e00\u8d77<\/li>\n<li>\n<ul>\n<li>5.1 \u7ba1\u9053\u5bb9\u91cf\u4e0d\u662f\u56fa\u5b9a\u5199\u6b7b\u7684\u7ed3\u8bba<\/li>\n<li>5.2 &#096;ulimit&#096; \u4e2d\u7684 pipe size \u4e0d\u7b49\u4e8e\u603b\u5bb9\u91cf<\/li>\n<li>5.3 &#096;PIPE_BUF&#096; \u89e3\u51b3\u7684\u662f\u5199\u5165\u539f\u5b50\u6027<\/li>\n<\/ul>\n<\/li>\n<li>\u603b\u7ed3<\/li>\n<\/ul>\n<h2>\u524d\u8a00<\/h2>\n<p>\u524d\u9762\u5b66\u4e60\u8fdb\u7a0b\u65f6&#xff0c;\u6211\u4eec\u4e00\u76f4\u5f3a\u8c03\u8fdb\u7a0b\u5177\u6709\u72ec\u7acb\u6027\u3002<\/p>\n<p>\u6bcf\u4e2a\u8fdb\u7a0b\u90fd\u6709\u81ea\u5df1\u7684 PCB\u3001\u865a\u62df\u5730\u5740\u7a7a\u95f4\u548c\u9875\u8868\u3002fork() \u521b\u5efa\u5b50\u8fdb\u7a0b\u4ee5\u540e&#xff0c;\u7236\u5b50\u8fdb\u7a0b\u867d\u7136\u8d77\u70b9\u76f8\u540c&#xff0c;\u4f46\u4ecd\u7136\u662f\u4e24\u4e2a\u72ec\u7acb\u7684\u8fdb\u7a0b&#xff1b;\u4e00\u65b9\u4fee\u6539\u666e\u901a\u53d8\u91cf&#xff0c;\u5e76\u4e0d\u4f1a\u76f4\u63a5\u6539\u5230\u53e6\u4e00\u65b9\u7684\u5730\u5740\u7a7a\u95f4\u3002<\/p>\n<p>\u9694\u79bb\u5e26\u6765\u4e86\u5b89\u5168\u6027&#xff0c;\u4e5f\u5e26\u6765\u4e86\u65b0\u7684\u95ee\u9898&#xff1a;\u4e24\u4e2a\u5f7c\u6b64\u72ec\u7acb\u7684\u8fdb\u7a0b&#xff0c;\u6570\u636e\u5230\u5e95\u600e\u4e48\u4f20&#xff1f;<\/p>\n<p>\u7ec8\u7aef\u91cc\u8fd9\u6761\u547d\u4ee4\u5c31\u662f\u6700\u76f4\u89c2\u7684\u4f8b\u5b50&#xff1a;<\/p>\n<p><span class=\"token function\">ls<\/span> <span class=\"token parameter variable\">-l<\/span> <span class=\"token operator\">|<\/span> <span class=\"token function\">wc<\/span> <span class=\"token parameter variable\">-l<\/span><\/p>\n<p>Shell \u4f1a\u5206\u522b\u521b\u5efa ls \u548c wc \u4e24\u4e2a\u8fdb\u7a0b&#xff0c;\u518d\u628a ls \u7684\u6807\u51c6\u8f93\u51fa\u63a5\u5230 wc \u7684\u6807\u51c6\u8f93\u5165\u3002\u4e24\u4e2a\u8fdb\u7a0b\u6ca1\u6709\u5171\u4eab\u666e\u901a\u53d8\u91cf&#xff0c;\u5374\u53ef\u4ee5\u901a\u8fc7\u5185\u6838\u63d0\u4f9b\u7684\u7ba1\u9053\u534f\u4f5c\u3002<\/p>\n<p>wc -l \u7edf\u8ba1\u7684\u662f ls -l \u8f93\u51fa\u7684\u884c\u6570&#xff0c;\u4e0d\u7b49\u4e8e\u201c\u5f53\u524d\u76ee\u5f55\u4e2d\u51c6\u786e\u7684\u6587\u4ef6\u6570\u91cf\u201d\u3002\u8fd9\u91cc\u7528\u5b83&#xff0c;\u53ea\u662f\u4e3a\u4e86\u89c2\u5bdf\u4e24\u4e2a\u8fdb\u7a0b\u600e\u6837\u901a\u8fc7\u7ba1\u9053\u8fde\u63a5\u8d77\u6765\u3002<\/p>\n<p>\u8fd9\u7bc7\u5148\u628a\u533f\u540d\u7ba1\u9053\u672c\u8eab\u8bb2\u900f&#xff1a;pipe() \u505a\u4e86\u4ec0\u4e48\u3001fork() \u540e fd \u600e\u6837\u7ee7\u627f\u3001\u4e3a\u4ec0\u4e48\u5fc5\u987b\u5173\u95ed\u65e0\u5173\u7aef&#xff0c;\u4ee5\u53ca\u7ba1\u9053\u4e3a\u7a7a\u3001\u5199\u6ee1\u3001\u5173\u95ed\u8bfb\u7aef\u6216\u5199\u7aef\u65f6\u4f1a\u53d1\u751f\u4ec0\u4e48\u3002\u8fdb\u7a0b\u6c60\u653e\u5230\u4e0b\u7bc7\u5355\u72ec\u5c55\u5f00\u3002<\/p>\n<hr \/>\n<h2>\u4e00\u3001\u8fdb\u7a0b\u4e3a\u4ec0\u4e48\u4e0d\u80fd\u76f4\u63a5\u901a\u4fe1<\/h2>\n<h3>1.1 \u8fdb\u7a0b\u4e3a\u4ec0\u4e48\u4e0d\u80fd\u76f4\u63a5\u628a\u6570\u636e\u4ea4\u7ed9\u5bf9\u65b9<\/h3>\n<p>\u5047\u8bbe\u8fdb\u7a0b A \u4e2d\u6709\u4e00\u4e2a\u5168\u5c40\u53d8\u91cf&#xff1a;<\/p>\n<p><span class=\"token keyword\">int<\/span> data <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u5373\u4f7f\u8fdb\u7a0b B \u662f\u901a\u8fc7 fork() \u521b\u5efa\u51fa\u6765\u7684\u5b50\u8fdb\u7a0b&#xff0c;B \u4fee\u6539\u81ea\u5df1\u7684 data&#xff0c;\u4e5f\u4e0d\u4f1a\u628a A \u4e2d\u7684 data \u4e00\u8d77\u6539\u6389\u3002<\/p>\n<p>\u539f\u56e0\u5f88\u76f4\u63a5&#xff1a;<\/p>\n<ul>\n<li>A \u548c B \u6709\u5404\u81ea\u7684\u865a\u62df\u5730\u5740\u7a7a\u95f4&#xff1b;<\/li>\n<li>\u5b83\u4eec\u6709\u5404\u81ea\u7684\u9875\u8868&#xff1b;<\/li>\n<li>\u8fdb\u7a0b\u770b\u5230\u7684\u53d8\u91cf\u5c5e\u4e8e\u81ea\u5df1\u7684\u7528\u6237\u7a7a\u95f4&#xff1b;<\/li>\n<li>\u5199\u5165\u65f6\u4f1a\u6309\u7167\u5199\u65f6\u62f7\u8d1d\u673a\u5236\u5b8c\u6210\u9694\u79bb\u3002<\/li>\n<\/ul>\n<p>\u6240\u4ee5&#xff0c;\u8fdb\u7a0b A \u4e0d\u80fd\u628a\u81ea\u5df1\u5806\u533a\u4e2d\u7684\u4e00\u5757\u5730\u5740\u76f4\u63a5\u544a\u8bc9\u8fdb\u7a0b B&#xff0c;\u7136\u540e\u8ba9 B \u5f53\u6210\u81ea\u5df1\u7684\u5730\u5740\u4f7f\u7528\u3002<\/p>\n<p>\u8fd9\u4e5f\u662f\u8fdb\u7a0b\u534f\u4f5c\u6bd4\u7ebf\u7a0b\u534f\u4f5c\u66f4\u9ebb\u70e6\u7684\u5730\u65b9\u3002<\/p>\n<h3>1.2 IPC \u7684\u542b\u4e49<\/h3>\n<p>IPC \u662f Inter-Process Communication \u7684\u7f29\u5199&#xff0c;\u4e5f\u5c31\u662f\u8fdb\u7a0b\u95f4\u901a\u4fe1\u3002<\/p>\n<p>\u8fdb\u7a0b\u901a\u4fe1\u901a\u5e38\u6709\u4e0b\u9762\u51e0\u7c7b\u76ee\u7684&#xff1a;<\/p>\n<ul>\n<li>\u6570\u636e\u4f20\u8f93&#xff1a;\u4e00\u4e2a\u8fdb\u7a0b\u628a\u5904\u7406\u7ed3\u679c\u4ea4\u7ed9\u53e6\u4e00\u4e2a\u8fdb\u7a0b&#xff1b;<\/li>\n<li>\u8d44\u6e90\u5171\u4eab&#xff1a;\u591a\u4e2a\u8fdb\u7a0b\u5171\u540c\u4f7f\u7528\u67d0\u7c7b\u8d44\u6e90&#xff1b;<\/li>\n<li>\u4e8b\u4ef6\u901a\u77e5&#xff1a;\u4e00\u4e2a\u8fdb\u7a0b\u901a\u77e5\u53e6\u4e00\u4e2a\u8fdb\u7a0b\u67d0\u4ef6\u4e8b\u5df2\u7ecf\u53d1\u751f&#xff1b;<\/li>\n<li>\u8fdb\u7a0b\u63a7\u5236&#xff1a;\u8c03\u8bd5\u5668\u7b49\u63a7\u5236\u8fdb\u7a0b\u89c2\u5bdf\u6216\u5e72\u9884\u76ee\u6807\u8fdb\u7a0b\u3002<\/li>\n<\/ul>\n<p>\u65e2\u7136\u8fdb\u7a0b\u5f7c\u6b64\u9694\u79bb&#xff0c;\u901a\u4fe1\u6570\u636e\u5c31\u4e0d\u80fd\u653e\u5728\u67d0\u4e2a\u8fdb\u7a0b\u81ea\u5df1\u7684\u5806\u6216\u6808\u91cc\u3002\u5b83\u9700\u8981\u4e00\u4e2a\u53cc\u65b9\u90fd\u80fd\u8bbf\u95ee\u3001\u540c\u65f6\u53c8\u4e0d\u5c5e\u4e8e\u4efb\u4f55\u4e00\u65b9\u666e\u901a\u7528\u6237\u7a7a\u95f4\u7684\u4f4d\u7f6e\u3002<\/p>\n<p><font color=\"#1E88E5\">\u6838\u5fc3&#xff1a;<\/font>\u8fdb\u7a0b\u95f4\u901a\u4fe1\u7684\u524d\u63d0&#xff0c;\u662f\u8ba9\u901a\u4fe1\u53cc\u65b9\u90fd\u80fd\u8bbf\u95ee\u540c\u4e00\u4e2a\u7531\u5185\u6838\u7ba1\u7406\u7684\u901a\u4fe1\u8d44\u6e90\u3002<\/p>\n<p>\u8fd9\u4efd\u8d44\u6e90\u4e0d\u5c5e\u4e8e\u67d0\u4e2a\u8fdb\u7a0b\u7684\u666e\u901a\u5806\u533a\u6216\u6808\u533a&#xff0c;\u800c\u662f\u7531\u64cd\u4f5c\u7cfb\u7edf\u521b\u5efa\u548c\u7ef4\u62a4\u3002\u8fdb\u7a0b\u518d\u901a\u8fc7\u6587\u4ef6\u63cf\u8ff0\u7b26\u7b49\u65b9\u5f0f\u62ff\u5230\u8bbf\u95ee\u5165\u53e3\u3002<\/p>\n<p>\u5bf9\u4e8e\u533f\u540d\u7ba1\u9053\u6765\u8bf4&#xff0c;\u8fd9\u4e2a\u5171\u540c\u8d44\u6e90\u5c31\u662f\u5185\u6838\u4e2d\u7684\u7ba1\u9053\u5bf9\u8c61\u53ca\u5176\u7f13\u51b2\u533a\u3002<\/p>\n<p>\u901a\u4fe1\u8fc7\u7a0b\u53ef\u4ee5\u6982\u62ec\u6210&#xff1a;<\/p>\n<p>\u5b50\u8fdb\u7a0b\u7528\u6237\u7a7a\u95f4<br \/>\n      \u2502 write<br \/>\n      \u25bc<br \/>\n\u5185\u6838\u7ba1\u9053\u7f13\u51b2\u533a<br \/>\n      \u2502 read<br \/>\n      \u25bc<br \/>\n\u7236\u8fdb\u7a0b\u7528\u6237\u7a7a\u95f4<\/p>\n<p>\u5199\u8fdb\u7a0b\u5148\u628a\u6570\u636e\u4ece\u81ea\u5df1\u7684\u7528\u6237\u7a7a\u95f4\u590d\u5236\u5230\u5185\u6838\u7ba1\u9053&#xff0c;\u8bfb\u8fdb\u7a0b\u518d\u628a\u6570\u636e\u4ece\u7ba1\u9053\u590d\u5236\u5230\u81ea\u5df1\u7684\u7528\u6237\u7a7a\u95f4\u3002<\/p>\n<p>\u7236\u5b50\u8fdb\u7a0b\u7684\u5730\u5740\u7a7a\u95f4\u4ecd\u7136\u662f\u72ec\u7acb\u7684&#xff0c;\u5b83\u4eec\u53ea\u662f\u501f\u52a9\u5185\u6838\u4e2d\u7684\u540c\u4e00\u6761\u7ba1\u9053\u5b8c\u6210\u6570\u636e\u4f20\u9012\u3002<\/p>\n<h3>1.3 \u64cd\u4f5c\u7cfb\u7edf\u4e3a\u4ec0\u4e48\u8981\u63d0\u4f9b\u7cfb\u7edf\u8c03\u7528<\/h3>\n<p>\u65e2\u7136\u901a\u4fe1\u8d44\u6e90\u7531\u64cd\u4f5c\u7cfb\u7edf\u7ba1\u7406&#xff0c;\u64cd\u4f5c\u7cfb\u7edf\u5c31\u9700\u8981\u8d1f\u8d23&#xff1a;<\/p>\n<li>\u521b\u5efa\u901a\u4fe1\u8d44\u6e90&#xff1b;<\/li>\n<li>\u63d0\u4f9b\u8bbf\u95ee\u8d44\u6e90\u7684\u5165\u53e3&#xff1b;<\/li>\n<li>\u7ef4\u62a4\u901a\u4fe1\u8fc7\u7a0b\u4e2d\u7684\u540c\u6b65\u5173\u7cfb&#xff1b;<\/li>\n<li>\u5728\u6ca1\u6709\u8fdb\u7a0b\u7ee7\u7eed\u4f7f\u7528\u65f6\u91ca\u653e\u8d44\u6e90\u3002<\/li>\n<p>\u7528\u6237\u8fdb\u7a0b\u4e0d\u80fd\u76f4\u63a5\u64cd\u4f5c\u5185\u6838\u5bf9\u8c61&#xff0c;\u53ea\u80fd\u901a\u8fc7\u7cfb\u7edf\u8c03\u7528\u5b8c\u6210\u8fd9\u4e9b\u52a8\u4f5c\u3002<\/p>\n<p>\u533f\u540d\u7ba1\u9053\u5bf9\u5e94\u7684\u6838\u5fc3\u63a5\u53e3\u5c31\u662f&#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\">pipe<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> pipefd<span class=\"token punctuation\">[<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u63a5\u4e0b\u6765\u5c31\u4ece\u8fd9\u6761\u63a5\u53e3\u5f00\u59cb\u3002<\/p>\n<hr \/>\n<h2>\u4e8c\u3001\u533f\u540d\u7ba1\u9053\u5230\u5e95\u662f\u4ec0\u4e48<\/h2>\n<h3>2.1 \u4ec0\u4e48\u662f\u7ba1\u9053<\/h3>\n<p>\u7ba1\u9053\u662f Unix \u4e2d\u975e\u5e38\u65e9\u7684\u4e00\u79cd\u8fdb\u7a0b\u95f4\u901a\u4fe1\u65b9\u5f0f\u3002<\/p>\n<p>\u53ef\u4ee5\u628a\u5b83\u7406\u89e3\u6210\u4e00\u6761\u4f4d\u4e8e\u5185\u6838\u4e2d\u7684\u6570\u636e\u901a\u9053&#xff1a;\u4e00\u7aef\u8d1f\u8d23\u5199\u5165&#xff0c;\u53e6\u4e00\u7aef\u8d1f\u8d23\u8bfb\u53d6&#xff0c;\u5199\u8fdb\u53bb\u7684\u6570\u636e\u6309\u7167\u5b57\u8282\u6d41\u7684\u65b9\u5f0f\u5411\u524d\u6d41\u52a8\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260808051724-6a76bbe44c83f.png\" alt=\"\u8fdb\u7a0b\u901a\u8fc7\u5185\u6838\u7ba1\u9053\u4f20\u9012\u6570\u636e\" \/><\/p>\n<p>\u7ba1\u9053\u672c\u8eab\u4e0d\u8d1f\u8d23\u628a\u6570\u636e\u4fdd\u5b58\u5230\u78c1\u76d8\u3002<\/p>\n<p>\u666e\u901a\u6587\u4ef6\u4e2d\u7684\u6570\u636e\u6700\u7ec8\u9700\u8981\u843d\u5230\u5b58\u50a8\u8bbe\u5907&#xff0c;\u800c\u533f\u540d\u7ba1\u9053\u4e2d\u7684\u6570\u636e\u53ea\u662f\u8fdb\u7a0b\u901a\u4fe1\u671f\u95f4\u7684\u4e34\u65f6\u6570\u636e\u3002\u6570\u636e\u88ab\u8bfb\u53d6\u4ee5\u540e&#xff0c;\u5c31\u4ece\u7ba1\u9053\u4e2d\u6d88\u8d39\u6389&#xff1b;\u6240\u6709\u76f8\u5173\u6587\u4ef6\u63cf\u8ff0\u7b26\u5173\u95ed\u540e&#xff0c;\u5185\u6838\u4f1a\u91ca\u653e\u8fd9\u6761\u7ba1\u9053\u3002<\/p>\n<h3>2.2 pipe() \u8fd4\u56de\u7684\u4e24\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26<\/h3>\n<p>\u8c03\u7528&#xff1a;<\/p>\n<p><span class=\"token keyword\">int<\/span> pipefd<span class=\"token punctuation\">[<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/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 keyword\">int<\/span> ret <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">pipe<\/span><span class=\"token punctuation\">(<\/span>pipefd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u6210\u529f\u65f6\u8fd4\u56de 0&#xff0c;\u5931\u8d25\u65f6\u8fd4\u56de -1\u3002<\/p>\n<p>\u4e24\u4e2a\u8f93\u51fa\u53c2\u6570\u7684\u542b\u4e49\u56fa\u5b9a&#xff1a;<\/p>\n<p>pipefd[0]&#xff1a;\u8bfb\u7aef<br \/>\npipefd[1]&#xff1a;\u5199\u7aef<\/p>\n<p>\u5982\u679c\u5f53\u524d\u8fdb\u7a0b\u7684 0\u30011\u30012 \u5df2\u7ecf\u5206\u522b\u88ab\u6807\u51c6\u8f93\u5165\u3001\u6807\u51c6\u8f93\u51fa\u548c\u6807\u51c6\u9519\u8bef\u5360\u7528&#xff0c;\u90a3\u4e48\u7b2c\u4e00\u6b21\u8c03\u7528 pipe() \u65f6&#xff0c;\u7ecf\u5e38\u4f1a\u5f97\u5230&#xff1a;<\/p>\n<p>pipefd[0] &#061; 3<br \/>\npipefd[1] &#061; 4<\/p>\n<p>\u8fd9\u4e24\u4e2a fd \u90fd\u5728\u5f53\u524d\u8fdb\u7a0b\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u8868\u4e2d&#xff0c;\u4f46\u5b83\u4eec\u6307\u5411\u7ba1\u9053\u7684\u4e0d\u540c\u7aef\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260808051724-6a76bbe48a1a4.png\" alt=\"pipe \u521b\u5efa\u8bfb\u7aef\u548c\u5199\u7aef\" \/><\/p>\n<p>\u533f\u540d\u7ba1\u9053\u6ca1\u6709\u8def\u5f84&#xff0c;\u4e5f\u6ca1\u6709\u53ef\u4f9b\u5176\u4ed6\u65e0\u5173\u8fdb\u7a0b\u91cd\u65b0\u6253\u5f00\u7684\u6587\u4ef6\u540d&#xff0c;\u6240\u4ee5\u53eb\u201c\u533f\u540d\u201d\u7ba1\u9053\u3002<\/p>\n<p>\u5b83\u6700\u5e38\u89c1\u7684\u4f7f\u7528\u573a\u666f&#xff0c;\u5c31\u662f\u5148\u7531\u7236\u8fdb\u7a0b\u8c03\u7528 pipe()&#xff0c;\u518d\u8c03\u7528 fork() \u521b\u5efa\u5b50\u8fdb\u7a0b\u3002<\/p>\n<h3>2.3 fork() \u540e\u4e3a\u4ec0\u4e48\u7236\u5b50\u8fdb\u7a0b\u80fd\u8bbf\u95ee\u540c\u4e00\u6761\u7ba1\u9053<\/h3>\n<p>\u7236\u8fdb\u7a0b\u5148\u521b\u5efa\u7ba1\u9053&#xff1a;<\/p>\n<p><span class=\"token keyword\">int<\/span> pipefd<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 function\">pipe<\/span><span class=\"token punctuation\">(<\/span>pipefd<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u518d\u521b\u5efa\u5b50\u8fdb\u7a0b&#xff1a;<\/p>\n<p>pid_t id <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>fork() \u4ee5\u540e&#xff0c;\u5b50\u8fdb\u7a0b\u4f1a\u5f97\u5230\u4e00\u4efd\u81ea\u5df1\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u8868\u3002\u8868\u662f\u5b50\u8fdb\u7a0b\u81ea\u5df1\u7684&#xff0c;\u4f46\u5176\u4e2d\u5df2\u6709 fd \u5bf9\u5e94\u7684\u5185\u6838\u5f15\u7528\u4f1a\u88ab\u7ee7\u627f\u3002<\/p>\n<p>\u4e5f\u5c31\u662f\u8bf4&#xff1a;<\/p>\n<p>\u7236\u8fdb\u7a0b pipefd[0] \u2500\u2510<br \/>\n                   \u251c\u2500\u2500 \u540c\u4e00\u6761\u7ba1\u9053\u7684\u8bfb\u7aef<br \/>\n\u5b50\u8fdb\u7a0b pipefd[0] \u2500\u2518<\/p>\n<p>\u7236\u8fdb\u7a0b pipefd[1] \u2500\u2510<br \/>\n                   \u251c\u2500\u2500 \u540c\u4e00\u6761\u7ba1\u9053\u7684\u5199\u7aef<br \/>\n\u5b50\u8fdb\u7a0b pipefd[1] \u2500\u2518<\/p>\n<p>\u8fd9\u91cc\u9700\u8981\u7ea0\u6b63\u4e00\u4e2a\u5f88\u5bb9\u6613\u5199\u9519\u7684\u8bf4\u6cd5\u3002<\/p>\n<p><font color=\"#F57C00\">\u8fd9\u91cc\u6700\u5bb9\u6613\u5199\u9519&#xff1a;<\/font>fork() \u4e0d\u4f1a\u91cd\u65b0\u590d\u5236\u4e00\u4efd struct file\u3001inode \u548c\u7ba1\u9053\u7f13\u51b2\u533a\u7ed9\u5b50\u8fdb\u7a0b\u3002<\/p>\n<p>\u66f4\u51c6\u786e\u7684\u7406\u89e3\u662f&#xff1a;<\/p>\n<ul>\n<li>\u5b50\u8fdb\u7a0b\u5f97\u5230\u81ea\u5df1\u7684 fd \u8868&#xff1b;<\/li>\n<li>fd \u8868\u4e2d\u7684\u6761\u76ee\u7ee7\u7eed\u5f15\u7528\u5df2\u6709\u7684\u5185\u6838\u6253\u5f00\u6587\u4ef6\u5bf9\u8c61&#xff1b;<\/li>\n<li>\u7236\u5b50\u8fdb\u7a0b\u56e0\u6b64\u80fd\u591f\u901a\u8fc7\u5404\u81ea\u7684 fd \u8bbf\u95ee\u540c\u4e00\u4e2a\u7ba1\u9053\u5bf9\u8c61&#xff1b;<\/li>\n<li>\u5185\u6838\u901a\u8fc7\u5f15\u7528\u8ba1\u6570\u5224\u65ad\u8fd8\u6709\u591a\u5c11\u63cf\u8ff0\u7b26\u6b63\u5728\u4f7f\u7528\u8fd9\u4e9b\u5bf9\u8c61\u3002<\/li>\n<\/ul>\n<p>\u6240\u4ee5\u7236\u5b50\u8fdb\u7a0b\u5171\u4eab\u7684\u662f<font color=\"#1E88E5\">\u5185\u6838\u7ba1\u9053\u8d44\u6e90\u7684\u8bbf\u95ee\u5173\u7cfb<\/font>&#xff0c;\u4e0d\u662f\u5171\u4eab\u5f7c\u6b64\u7528\u6237\u7a7a\u95f4\u4e2d\u7684\u666e\u901a\u53d8\u91cf\u3002<\/p>\n<h3>2.4 \u4e3a\u4ec0\u4e48\u5fc5\u987b\u5173\u95ed\u4e0d\u9700\u8981\u7684\u7aef<\/h3>\n<p>pipe() \u521b\u5efa\u4ee5\u540e&#xff0c;\u7236\u5b50\u8fdb\u7a0b\u6700\u5f00\u59cb\u90fd\u540c\u65f6\u6301\u6709\u8bfb\u7aef\u548c\u5199\u7aef\u3002<\/p>\n<p>\u5982\u679c\u6211\u4eec\u8bbe\u8ba1\u6210\u201c\u5b50\u8fdb\u7a0b\u5199&#xff0c;\u7236\u8fdb\u7a0b\u8bfb\u201d&#xff0c;\u90a3\u4e48\u5e94\u8be5\u8fd9\u6837\u5904\u7406&#xff1a;<\/p>\n<p>pid_t id <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>id <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 comment\">\/\/ \u5b50\u8fdb\u7a0b\u53ea\u8d1f\u8d23\u5199<\/span><br \/>\n    <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>pipefd<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ \u5199\u6570\u636e<\/span><br \/>\n    <span class=\"token comment\">\/\/ &#8230;<\/span><\/p>\n<p>    <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>pipefd<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/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><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><span class=\"token comment\">\/\/ \u7236\u8fdb\u7a0b\u53ea\u8d1f\u8d23\u8bfb<\/span><br \/>\n<span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>pipefd<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u8bfb\u6570\u636e<\/span><br \/>\n<span class=\"token comment\">\/\/ &#8230;<\/span><\/p>\n<p><span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>pipefd<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><font color=\"#F57C00\">\u5173\u95ed\u65e0\u7528\u7aef\u4e0d\u53ea\u662f\u4e3a\u4e86\u8ba9\u4ee3\u7801\u597d\u770b<\/font>&#xff0c;\u5b83\u8fd8\u4f1a\u76f4\u63a5\u5f71\u54cd\u7ba1\u9053\u7684\u8bfb\u5199\u89c4\u5219\u3002<\/p>\n<p>\u4f8b\u5982&#xff0c;\u7236\u8fdb\u7a0b\u8bfb\u5b8c\u73b0\u6709\u6570\u636e\u540e&#xff0c;\u53ea\u6709\u5f53\u6240\u6709\u5199\u7aef\u5f15\u7528\u90fd\u5df2\u7ecf\u5173\u95ed&#xff0c;read() \u624d\u4f1a\u8fd4\u56de 0&#xff0c;\u8868\u793a\u8bfb\u5230\u4e86\u6587\u4ef6\u7ed3\u5c3e\u3002<\/p>\n<p>\u5982\u679c\u67d0\u4e2a\u8fdb\u7a0b\u8fd8\u610f\u5916\u6301\u6709\u5199\u7aef&#xff0c;\u5373\u4f7f\u5b83\u4ece\u6765\u4e0d\u5199\u6570\u636e&#xff0c;\u8bfb\u8fdb\u7a0b\u4e5f\u53ef\u80fd\u4e00\u76f4\u7b49\u4e0d\u5230 EOF\u3002<\/p>\n<hr \/>\n<h2>\u4e09\u3001\u5148\u628a\u6700\u5c0f Demo \u8dd1\u8d77\u6765<\/h2>\n<p>\u4e0b\u9762\u8bbe\u8ba1\u6210&#xff1a;<\/p>\n<p>\u5b50\u8fdb\u7a0b&#xff1a;\u5411\u7ba1\u9053\u5199\u6d88\u606f<br \/>\n\u7236\u8fdb\u7a0b&#xff1a;\u4ece\u7ba1\u9053\u8bfb\u6d88\u606f<\/p>\n<h3>3.1 \u521b\u5efa\u7ba1\u9053\u548c\u5b50\u8fdb\u7a0b<\/h3>\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;cstring&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><\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">ChildWrite<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> wfd<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> buffer<span class=\"token punctuation\">[<\/span><span class=\"token number\">1024<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> count <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span>count <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> len <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">snprintf<\/span><span class=\"token punctuation\">(<\/span><br \/>\n            buffer<span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>buffer<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#034;I am child, pid: %d, count: %d\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token function\">getpid<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            count<span class=\"token operator\">&#043;&#043;<\/span><br \/>\n        <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token function\">write<\/span><span class=\"token punctuation\">(<\/span>wfd<span class=\"token punctuation\">,<\/span> buffer<span class=\"token punctuation\">,<\/span> len<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 punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">FatherRead<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> rfd<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> buffer<span class=\"token punctuation\">[<\/span><span class=\"token number\">1024<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        ssize_t n <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">read<\/span><span class=\"token punctuation\">(<\/span>rfd<span class=\"token punctuation\">,<\/span> buffer<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>buffer<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><\/p>\n<p>        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>n <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            buffer<span class=\"token punctuation\">[<\/span>n<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token char\">&#039;\\\\0&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;child say: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> buffer<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>n <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            std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u5199\u7aef\u5df2\u7ecf\u5168\u90e8\u5173\u95ed&#xff0c;\u7236\u8fdb\u7a0b\u8bfb\u53d6\u7ed3\u675f&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">break<\/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\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;read&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token keyword\">break<\/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 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\">int<\/span> pipefd<span class=\"token punctuation\">[<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token number\">0<\/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 function\">pipe<\/span><span class=\"token punctuation\">(<\/span>pipefd<span class=\"token punctuation\">)<\/span> <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\">perror<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;pipe&#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>    std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;read fd: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> pipefd<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;write fd: &#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> pipefd<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span><\/p>\n<p>    pid_t id <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>id <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\">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 keyword\">return<\/span> <span class=\"token number\">2<\/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>id <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\">close<\/span><span class=\"token punctuation\">(<\/span>pipefd<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token function\">ChildWrite<\/span><span class=\"token punctuation\">(<\/span>pipefd<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>pipefd<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/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><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>    <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>pipefd<span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token function\">FatherRead<\/span><span class=\"token punctuation\">(<\/span>pipefd<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token function\">close<\/span><span class=\"token punctuation\">(<\/span>pipefd<span class=\"token punctuation\">[<\/span><span class=\"token number\">0<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">waitpid<\/span><span class=\"token punctuation\">(<\/span>id<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">nullptr<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span><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\u65f6&#xff0c;\u5b50\u8fdb\u7a0b\u6bcf\u9694\u4e00\u79d2\u5411\u5199\u7aef\u5199\u4e00\u6761\u6d88\u606f&#xff0c;\u7236\u8fdb\u7a0b\u4ece\u8bfb\u7aef\u53d6\u51fa\u6570\u636e\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260808051724-6a76bbe4a9c3e.png\" alt=\"\u7236\u5b50\u8fdb\u7a0b\u4f7f\u7528\u533f\u540d\u7ba1\u9053\u901a\u4fe1\" \/><\/p>\n<p>\u8fd9\u91cc\u53d8\u5316\u7684 count \u662f\u5b50\u8fdb\u7a0b\u81ea\u5df1\u7684\u666e\u901a\u53d8\u91cf\u3002<\/p>\n<p>\u5b83\u7684\u53d8\u5316\u53ea\u80fd\u8bf4\u660e\u5b50\u8fdb\u7a0b\u5728\u6301\u7eed\u751f\u6210\u4e0d\u540c\u7684\u6d88\u606f&#xff0c;\u4e0d\u80fd\u7528\u6765\u8bc1\u660e\u7236\u5b50\u8fdb\u7a0b\u5171\u4eab\u4e86\u53d8\u91cf&#xff0c;\u4e5f\u4e0d\u80fd\u7528\u6765\u8bc1\u660e\u5199\u65f6\u62f7\u8d1d\u662f\u5426\u53d1\u751f\u3002<\/p>\n<p><font color=\"#1E88E5\">\u771f\u6b63\u5b8c\u6210\u901a\u4fe1\u7684\u662f\u4e0b\u9762\u8fd9\u6761\u94fe\u8def&#xff1a;<\/font><\/p>\n<p>\u5b50\u8fdb\u7a0b buffer<br \/>\n    \u2502 write<br \/>\n    \u25bc<br \/>\n\u5185\u6838\u7ba1\u9053<br \/>\n    \u2502 read<br \/>\n    \u25bc<br \/>\n\u7236\u8fdb\u7a0b buffer<\/p>\n<h3>3.2 \u6570\u636e\u4e3a\u4ec0\u4e48\u662f\u201c\u8bfb\u540e\u6d88\u8d39\u201d<\/h3>\n<p>\u7ba1\u9053\u662f\u5b57\u8282\u6d41\u3002<\/p>\n<p>\u5b50\u8fdb\u7a0b\u8c03\u7528 write() \u540e&#xff0c;\u5b57\u8282\u8fdb\u5165\u5185\u6838\u7ba1\u9053&#xff1b;\u7236\u8fdb\u7a0b\u8c03\u7528 read() \u53d6\u8d70\u4e00\u90e8\u5206\u5b57\u8282\u540e&#xff0c;\u8fd9\u90e8\u5206\u6570\u636e\u5c31\u4e0d\u518d\u7559\u5728\u7ba1\u9053\u4e2d\u7b49\u5f85\u7b2c\u4e8c\u6b21\u8bfb\u53d6\u3002<\/p>\n<p>\u4f8b\u5982\u5b50\u8fdb\u7a0b\u5199\u5165\u6574\u6570 14&#xff1a;<\/p>\n<li>14 \u7684\u5b57\u8282\u8868\u793a\u88ab\u590d\u5236\u5230\u7ba1\u9053&#xff1b;<\/li>\n<li>\u7236\u8fdb\u7a0b\u8bfb\u53d6\u540e&#xff0c;\u6570\u636e\u88ab\u590d\u5236\u5230\u7236\u8fdb\u7a0b\u81ea\u5df1\u7684\u53d8\u91cf&#xff1b;<\/li>\n<li>\u5df2\u7ecf\u8bfb\u8d70\u7684\u90a3\u90e8\u5206\u5b57\u8282\u4ece\u7ba1\u9053\u4e2d\u88ab\u6d88\u8d39\u3002<\/li>\n<p>\u6240\u4ee5\u533f\u540d\u7ba1\u9053\u4e0d\u662f\u201c\u7236\u5b50\u8fdb\u7a0b\u5171\u540c\u62ff\u7740\u540c\u4e00\u4e2a\u7528\u6237\u53d8\u91cf\u4fee\u6539\u201d&#xff0c;\u800c\u662f\u4e00\u4e2a\u5178\u578b\u7684\u751f\u4ea7\u8005\u2014\u6d88\u8d39\u8005\u6a21\u578b\u3002<\/p>\n<hr \/>\n<h2>\u56db\u3001\u7ba1\u9053\u771f\u6b63\u5bb9\u6613\u8e29\u5751\u7684\u8bfb\u5199\u89c4\u5219<\/h2>\n<h3>4.1 \u533f\u540d\u7ba1\u9053\u7684\u51e0\u4e2a\u7279\u70b9<\/h3>\n<h4>1. \u5e38\u7528\u4e8e\u5177\u6709\u4eb2\u7f18\u5173\u7cfb\u7684\u8fdb\u7a0b<\/h4>\n<p>\u533f\u540d\u7ba1\u9053\u6ca1\u6709\u6587\u4ef6\u540d\u3002<\/p>\n<p>\u7236\u8fdb\u7a0b\u5148\u62ff\u5230 fd&#xff0c;\u518d\u901a\u8fc7 fork() \u628a fd \u7684\u8bbf\u95ee\u5173\u7cfb\u7ee7\u627f\u7ed9\u5b50\u8fdb\u7a0b&#xff0c;\u56e0\u6b64\u5b83\u901a\u5e38\u7528\u4e8e\u7236\u5b50\u8fdb\u7a0b&#xff0c;\u6216\u8005\u62e5\u6709\u5171\u540c\u7956\u5148\u7684\u8fdb\u7a0b\u4e4b\u95f4\u3002<\/p>\n<h4>2. \u7ba1\u9053\u81ea\u5e26\u540c\u6b65\u5173\u7cfb<\/h4>\n<p>\u5f53\u7ba1\u9053\u4e3a\u7a7a&#xff0c;\u4f46\u5199\u7aef\u4ecd\u7136\u5b58\u5728\u65f6&#xff0c;\u963b\u585e\u6a21\u5f0f\u4e0b\u7684 read() \u4f1a\u7b49\u5f85\u6570\u636e\u3002<\/p>\n<p>\u5f53\u7ba1\u9053\u5df2\u7ecf\u5199\u6ee1&#xff0c;\u4f46\u8bfb\u7aef\u4ecd\u7136\u5b58\u5728\u65f6&#xff0c;\u963b\u585e\u6a21\u5f0f\u4e0b\u7684 write() \u4f1a\u7b49\u5f85\u7a7a\u95f4\u3002<\/p>\n<p>\u8fd9\u91cc\u7684\u201c\u540c\u6b65\u201d\u53ef\u4ee5\u76f4\u63a5\u7406\u89e3\u6210&#xff1a;<\/p>\n<p>\u4e00\u4e2a\u8fdb\u7a0b\u7684\u6267\u884c\u6761\u4ef6&#xff0c;\u8981\u7b49\u5f85\u53e6\u4e00\u4e2a\u8fdb\u7a0b\u7684\u884c\u4e3a\u624d\u80fd\u6ee1\u8db3\u3002<\/p>\n<h4>3. \u7ba1\u9053\u9762\u5411\u5b57\u8282\u6d41<\/h4>\n<p>\u7ba1\u9053\u4e0d\u4fdd\u5b58\u201c\u6d88\u606f\u8fb9\u754c\u201d\u3002<\/p>\n<p>\u5047\u8bbe\u5b50\u8fdb\u7a0b\u8fde\u7eed\u5199\u5165\u5341\u6761\u5b57\u7b26\u4e32&#xff0c;\u7236\u8fdb\u7a0b\u4e00\u6b21 read()&#xff1a;<\/p>\n<ul>\n<li>\u53ef\u80fd\u53ea\u8bfb\u5230\u4e00\u6761&#xff1b;<\/li>\n<li>\u53ef\u80fd\u8bfb\u5230\u591a\u6761\u62fc\u5728\u4e00\u8d77&#xff1b;<\/li>\n<li>\u4e5f\u53ef\u80fd\u8bfb\u5230\u67d0\u6761\u6d88\u606f\u7684\u4e00\u90e8\u5206\u3002<\/li>\n<\/ul>\n<p>\u6700\u7ec8\u8bfb\u591a\u5c11&#xff0c;\u53d6\u51b3\u4e8e&#xff1a;<\/p>\n<ul>\n<li>\u7ba1\u9053\u5f53\u524d\u6709\u591a\u5c11\u6570\u636e&#xff1b;<\/li>\n<li>read() \u4f20\u5165\u7684\u7f13\u51b2\u533a\u5927\u5c0f&#xff1b;<\/li>\n<li>\u5185\u6838\u5f53\u6b21\u8fd4\u56de\u7684\u5b57\u8282\u6570\u3002<\/li>\n<\/ul>\n<p>\u6240\u4ee5\u4e0d\u80fd\u8ba4\u4e3a<font color=\"#F57C00\">\u4e00\u6b21 write() \u5fc5\u7136\u5bf9\u5e94\u4e00\u6b21 read()<\/font>\u3002<\/p>\n<p>\u4e0b\u9762\u8fd9\u79cd\u201c\u5199\u5f97\u5feb\u3001\u8bfb\u5f97\u6162\u201d\u7684\u7a0b\u5e8f&#xff0c;\u5f88\u5bb9\u6613\u5148\u628a\u7ba1\u9053\u5199\u6ee1&#xff1a;<\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">ChildWrite<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> wfd<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> buffer<span class=\"token punctuation\">[<\/span><span class=\"token number\">1024<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> count <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">int<\/span> len <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">snprintf<\/span><span class=\"token punctuation\">(<\/span><br \/>\n            buffer<span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>buffer<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token string\">&#034;I am child, pid: %d, count: %d\\\\n&#034;<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            <span class=\"token function\">getpid<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n            count<span class=\"token operator\">&#043;&#043;<\/span><br \/>\n        <span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token function\">write<\/span><span class=\"token punctuation\">(<\/span>wfd<span class=\"token punctuation\">,<\/span> buffer<span class=\"token punctuation\">,<\/span> len<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">FatherRead<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> rfd<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> buffer<span class=\"token punctuation\">[<\/span><span class=\"token number\">1024<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token function\">sleep<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        ssize_t n <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">read<\/span><span class=\"token punctuation\">(<\/span>rfd<span class=\"token punctuation\">,<\/span> buffer<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>buffer<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><\/p>\n<p>        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>n <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            buffer<span class=\"token punctuation\">[<\/span>n<span class=\"token punctuation\">]<\/span> <span class=\"token operator\">&#061;<\/span> <span class=\"token char\">&#039;\\\\0&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n            std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> buffer<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u5f53\u7ba1\u9053\u6ca1\u6709\u5269\u4f59\u7a7a\u95f4\u65f6&#xff0c;\u5b50\u8fdb\u7a0b\u4f1a\u963b\u585e\u5728 write()&#xff0c;\u7b49\u5f85\u7236\u8fdb\u7a0b\u8bfb\u8d70\u4e00\u90e8\u5206\u6570\u636e\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260808051724-6a76bbe4bb540.png\" alt=\"\u5199\u7aef\u901f\u5ea6\u5feb\u4e8e\u8bfb\u7aef\u65f6\u7684\u73b0\u8c61\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260808051724-6a76bbe4cff79.png\" alt=\"\u7ba1\u9053\u5199\u6ee1\u540e\u5199\u8fdb\u7a0b\u963b\u585e\" \/><\/p>\n<p>\u53cd\u8fc7\u6765&#xff0c;\u5982\u679c\u5b50\u8fdb\u7a0b\u6bcf\u9694\u4e00\u79d2\u5199\u4e00\u6761&#xff0c;\u7236\u8fdb\u7a0b\u4e00\u76f4\u8bfb\u53d6&#xff0c;\u5c31\u4f1a\u8868\u73b0\u4e3a\u5199\u4e00\u6761\u3001\u8bfb\u4e00\u6761&#xff1a;<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260808051725-6a76bbe512647.png\" alt=\"\u5199\u7aef\u8f83\u6162\u65f6\u7684\u8bfb\u53d6\u73b0\u8c61\" \/><\/p>\n<h4>4. \u4e00\u6761\u7ba1\u9053\u53ea\u63d0\u4f9b\u4e00\u4e2a\u6570\u636e\u65b9\u5411<\/h4>\n<p>\u4e00\u6761\u533f\u540d\u7ba1\u9053\u6709\u8bfb\u7aef\u548c\u5199\u7aef&#xff0c;\u6570\u636e\u4ece\u5199\u7aef\u6d41\u5411\u8bfb\u7aef\u3002<\/p>\n<p>\u5982\u679c A \u8981\u7ed9 B \u53d1\u6570\u636e&#xff0c;\u540c\u65f6 B \u4e5f\u8981\u7ed9 A \u53d1\u6570\u636e&#xff0c;\u901a\u5e38\u9700\u8981\u521b\u5efa\u4e24\u6761\u7ba1\u9053&#xff1a;<\/p>\n<p>\u7ba1\u9053 1&#xff1a;A \u5199&#xff0c;B \u8bfb<br \/>\n\u7ba1\u9053 2&#xff1a;B \u5199&#xff0c;A \u8bfb<\/p>\n<p>\u6240\u4ee5\u8fd9\u91cc\u66f4\u51c6\u786e\u7684\u8bf4\u6cd5\u662f&#xff1a;\u4e00\u6761\u7ba1\u9053\u662f\u5355\u5411\u5b57\u8282\u6d41\u901a\u9053\u3002\u9700\u8981\u53cc\u5411\u901a\u4fe1\u65f6&#xff0c;\u8981\u989d\u5916\u5efa\u7acb\u53e6\u4e00\u6761\u901a\u9053\u3002<\/p>\n<h4>5. \u751f\u547d\u5468\u671f\u7531\u6240\u6709\u5f15\u7528\u5171\u540c\u51b3\u5b9a<\/h4>\n<p>\u67d0\u4e00\u4e2a\u8fdb\u7a0b\u9000\u51fa&#xff0c;\u5e76\u4e0d\u4e00\u5b9a\u4ee3\u8868\u7ba1\u9053\u7acb\u5373\u6d88\u5931\u3002<\/p>\n<p>\u53ea\u6709\u5f53\u6240\u6709\u6307\u5411\u7ba1\u9053\u8bfb\u7aef\u3001\u5199\u7aef\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u90fd\u5173\u95ed\u540e&#xff0c;\u5185\u6838\u624d\u4f1a\u771f\u6b63\u91ca\u653e\u5bf9\u5e94\u8d44\u6e90\u3002<\/p>\n<h3>4.2 \u56db\u79cd\u5178\u578b\u60c5\u51b5<\/h3>\n<h4>\u60c5\u51b5\u4e00&#xff1a;\u5199\u7aef\u6b63\u5e38&#xff0c;\u4f46\u6682\u65f6\u6ca1\u6709\u6570\u636e<\/h4>\n<p>\u5982\u679c\u5199\u7aef\u4ecd\u7136\u5b58\u5728&#xff0c;\u7ba1\u9053\u53c8\u662f\u7a7a\u7684&#xff1a;<\/p>\n<p><span class=\"token function\">read<\/span><span class=\"token punctuation\">(<\/span>rfd<span class=\"token punctuation\">,<\/span> buffer<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>buffer<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u963b\u585e\u6a21\u5f0f\u4e0b&#xff0c;\u8bfb\u8fdb\u7a0b\u4f1a\u7b49\u5f85\u5199\u8fdb\u7a0b\u5199\u5165\u3002<\/p>\n<p>\u8fd9\u5c31\u662f\u201c\u8bfb\u7a7a\u5219\u7b49\u201d\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260808051725-6a76bbe523124.png\" alt=\"\u7ba1\u9053\u4e3a\u7a7a\u65f6\u8bfb\u8fdb\u7a0b\u7b49\u5f85\" \/><\/p>\n<h4>\u60c5\u51b5\u4e8c&#xff1a;\u8bfb\u7aef\u6b63\u5e38&#xff0c;\u4f46\u7ba1\u9053\u5df2\u7ecf\u5199\u6ee1<\/h4>\n<p>\u5982\u679c\u8fd8\u6709\u8bfb\u7aef\u5b58\u5728&#xff0c;\u53ea\u662f\u8bfb\u5f97\u6bd4\u8f83\u6162&#xff0c;\u5199\u8fdb\u7a0b\u4f1a\u5728\u7ba1\u9053\u6ee1\u65f6\u963b\u585e\u3002<\/p>\n<p>\u7b49\u8bfb\u8fdb\u7a0b\u53d6\u8d70\u6570\u636e\u3001\u7ba1\u9053\u91cd\u65b0\u51fa\u73b0\u7a7a\u95f4\u540e&#xff0c;\u5199\u64cd\u4f5c\u624d\u80fd\u7ee7\u7eed\u3002<\/p>\n<p><font color=\"#2E7D32\">\u7ed3\u8bba&#xff1a;<\/font>\u7ba1\u9053\u5199\u6ee1\u540e\u4e0d\u4f1a\u628a\u65e7\u6570\u636e\u76f4\u63a5\u8986\u76d6\u6389&#xff0c;\u963b\u585e\u5199\u4f1a\u7b49\u5f85\u8bfb\u7aef\u91ca\u653e\u7a7a\u95f4\u3002<\/p>\n<h4>\u60c5\u51b5\u4e09&#xff1a;\u6240\u6709\u5199\u7aef\u5173\u95ed&#xff0c;\u8bfb\u7aef\u7ee7\u7eed\u8bfb\u53d6<\/h4>\n<p>\u5f53\u6240\u6709\u5199\u7aef\u90fd\u5173\u95ed&#xff0c;\u5e76\u4e14\u7ba1\u9053\u4e2d\u5269\u4f59\u6570\u636e\u5df2\u7ecf\u8bfb\u5b8c\u540e&#xff1a;<\/p>\n<p>ssize_t n <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">read<\/span><span class=\"token punctuation\">(<\/span>rfd<span class=\"token punctuation\">,<\/span> buffer<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">sizeof<\/span><span class=\"token punctuation\">(<\/span>buffer<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>\u8fd4\u56de&#xff1a;<\/p>\n<p>n &#061;&#061; 0<\/p>\n<p>\u8fd9\u4e2a 0 \u8868\u793a <font color=\"#2E7D32\">EOF<\/font>\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260808051725-6a76bbe533bcd.png\" alt=\"\u5199\u7aef\u5173\u95ed\u540e read \u8fd4\u56de 0\" \/><\/p>\n<p>\u6ce8\u610f\u662f\u6240\u6709\u5199\u7aef\u5f15\u7528\u90fd\u5173\u95ed&#xff0c;\u800c\u4e0d\u53ea\u662f\u4f60\u8ba4\u4e3a\u7684\u201c\u90a3\u4e2a\u8d1f\u8d23\u5199\u7684\u5b50\u8fdb\u7a0b\u201d\u5173\u95ed\u3002<\/p>\n<h4>\u60c5\u51b5\u56db&#xff1a;\u6240\u6709\u8bfb\u7aef\u5173\u95ed&#xff0c;\u5199\u7aef\u7ee7\u7eed\u5199<\/h4>\n<p>\u5982\u679c\u6240\u6709\u8bfb\u7aef\u90fd\u5df2\u7ecf\u5173\u95ed&#xff0c;\u5199\u8fdb\u7a0b\u7ee7\u7eed\u8c03\u7528 write()&#xff0c;\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u4f1a\u6536\u5230 SIGPIPE \u4fe1\u53f7\u3002<\/p>\n<p>SIGPIPE \u5728 Linux \u4e2d\u901a\u5e38\u662f 13 \u53f7\u4fe1\u53f7&#xff0c;<font color=\"#D32F2F\">\u9ed8\u8ba4\u52a8\u4f5c\u662f\u7ec8\u6b62\u8fdb\u7a0b<\/font>\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260808051725-6a76bbe543c43.png\" alt=\"\u6240\u6709\u8bfb\u7aef\u5173\u95ed\u540e\u5199\u8fdb\u7a0b\u6536\u5230 SIGPIPE\" \/><\/p>\n<p><font color=\"#D32F2F\">\u6ce8\u610f&#xff1a;<\/font>\u4e0d\u8981\u628a\u5b83\u7406\u89e3\u6210\u201c\u64cd\u4f5c\u7cfb\u7edf\u4e00\u5b9a\u76f4\u63a5\u6740\u6389\u5199\u8fdb\u7a0b\u201d\u3002\u66f4\u51c6\u786e\u5730\u8bf4&#xff0c;\u662f\u5185\u6838\u4ea7\u751f SIGPIPE&#xff1b;\u5982\u679c\u8fdb\u7a0b\u6ca1\u6709\u6355\u83b7\u6216\u5ffd\u7565\u8be5\u4fe1\u53f7&#xff0c;\u5c31\u4f1a\u6309\u7167\u9ed8\u8ba4\u52a8\u4f5c\u9000\u51fa\u3002\u82e5\u4fe1\u53f7\u88ab\u5ffd\u7565&#xff0c;write() \u4f1a\u5931\u8d25\u5e76\u8bbe\u7f6e errno &#061; EPIPE\u3002<\/p>\n<hr \/>\n<h2>\u4e94\u3001\u7ba1\u9053\u5bb9\u91cf\u548c PIPE_BUF \u522b\u6df7\u5728\u4e00\u8d77<\/h2>\n<h3>5.1 \u7ba1\u9053\u5bb9\u91cf\u4e0d\u662f\u56fa\u5b9a\u5199\u6b7b\u7684\u7ed3\u8bba<\/h3>\n<p>\u53ef\u4ee5\u8ba9\u5b50\u8fdb\u7a0b\u6bcf\u6b21\u5199\u4e00\u4e2a\u5b57\u8282&#xff0c;\u7236\u8fdb\u7a0b\u6682\u65f6\u4e0d\u8bfb&#xff0c;\u89c2\u5bdf\u5199\u5165\u8ba1\u6570\u4ec0\u4e48\u65f6\u5019\u505c\u6b62&#xff1a;<\/p>\n<p><span class=\"token keyword\">void<\/span> <span class=\"token function\">ChildWrite<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> wfd<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token keyword\">char<\/span> ch <span class=\"token operator\">&#061;<\/span> <span class=\"token char\">&#039;A&#039;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">int<\/span> count <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><br \/>\n        ssize_t n <span class=\"token operator\">&#061;<\/span> <span class=\"token function\">write<\/span><span class=\"token punctuation\">(<\/span>wfd<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>ch<span class=\"token punctuation\">,<\/span> <span class=\"token number\">1<\/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>n <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">{<\/span><br \/>\n            std<span class=\"token double-colon punctuation\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> count<span class=\"token operator\">&#043;&#043;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token double-colon punctuation\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u67d0\u4e9b Ubuntu \u73af\u5883\u4e2d\u53ef\u80fd\u89c2\u5bdf\u5230\u5927\u7ea6 65536 \u5b57\u8282&#xff0c;\u4e5f\u5c31\u662f 64 KiB&#xff1a;<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260808051725-6a76bbe551a48.png\" alt=\"\u901a\u8fc7\u5b9e\u9a8c\u89c2\u5bdf\u7ba1\u9053\u5bb9\u91cf\" \/><\/p>\n<p>\u4f46\u662f\u6587\u7ae0\u4e2d<font color=\"#D32F2F\">\u4e0d\u80fd\u628a\u201c64 KiB\u201d\u5199\u6210\u6240\u6709 Linux \u73af\u5883\u6c38\u8fdc\u4e0d\u53d8\u7684\u56fa\u5b9a\u503c<\/font>\u3002<\/p>\n<p>\u7ba1\u9053\u5bb9\u91cf\u53ef\u80fd\u53d7\u5230&#xff1a;<\/p>\n<ul>\n<li>\u5185\u6838\u7248\u672c&#xff1b;<\/li>\n<li>\u7cfb\u7edf\u9875\u5927\u5c0f&#xff1b;<\/li>\n<li>\u7ba1\u9053\u52a8\u6001\u6269\u5bb9\u7b56\u7565&#xff1b;<\/li>\n<li>fcntl() \u8c03\u6574&#xff1b;<\/li>\n<li>\u7cfb\u7edf\u8d44\u6e90\u9650\u5236<\/li>\n<\/ul>\n<p>\u7b49\u56e0\u7d20\u5f71\u54cd\u3002<\/p>\n<p>\u5b9e\u9a8c\u53ea\u80fd\u8bf4\u660e\u5f53\u524d\u673a\u5668\u3001\u5f53\u524d\u73af\u5883\u4e2d\u7684\u7ed3\u679c\u3002<\/p>\n<h3>5.2 ulimit \u4e2d\u7684 pipe size \u4e0d\u7b49\u4e8e\u603b\u5bb9\u91cf<\/h3>\n<p>\u6267\u884c&#xff1a;<\/p>\n<p><span class=\"token builtin class-name\">ulimit<\/span> <span class=\"token parameter variable\">-a<\/span><\/p>\n<p>\u53ef\u80fd\u4f1a\u770b\u5230\u4e0e pipe size \u6709\u5173\u7684\u9879\u76ee&#xff1a;<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260808051725-6a76bbe565188.png\" alt=\"ulimit \u4e2d\u7684\u7ba1\u9053\u76f8\u5173\u9650\u5236\" \/><\/p>\n<p>\u8fd9\u91cc\u663e\u793a\u7684\u503c<font color=\"#F57C00\">\u4e0d\u80fd\u76f4\u63a5\u548c\u201c\u7ba1\u9053\u5f53\u524d\u603b\u5bb9\u91cf\u201d\u753b\u7b49\u53f7<\/font>\u3002<\/p>\n<p>\u6587\u7ae0\u4e2d\u6700\u5bb9\u6613\u6df7\u6dc6\u7684\u662f\u4e24\u4e2a\u6982\u5ff5&#xff1a;<\/p>\n<table>\n<tr>\u6982\u5ff5\u4f5c\u7528<\/tr>\n<tbody>\n<tr>\n<td>\u7ba1\u9053\u5bb9\u91cf<\/td>\n<td>\u7ba1\u9053\u7f13\u51b2\u533a\u603b\u5171\u80fd\u5bb9\u7eb3\u591a\u5c11\u6570\u636e<\/td>\n<\/tr>\n<tr>\n<td>PIPE_BUF<\/td>\n<td>\u591a\u8fdb\u7a0b\u5199\u540c\u4e00\u6761\u7ba1\u9053\u65f6&#xff0c;\u5185\u6838\u4fdd\u8bc1\u539f\u5b50\u5199\u7684\u4e0a\u9650<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>5.3 PIPE_BUF \u89e3\u51b3\u7684\u662f\u5199\u5165\u539f\u5b50\u6027<\/h3>\n<p>\u53ef\u4ee5\u901a\u8fc7&#xff1a;<\/p>\n<p><span class=\"token function\">man<\/span> <span class=\"token number\">7<\/span> pipe<\/p>\n<p>\u67e5\u770b\u7ba1\u9053\u89c4\u5219\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/08\/20260808051725-6a76bbe577c29.png\" alt=\"man 7 pipe \u4e2d\u7684 PIPE_BUF \u8bf4\u660e\" \/><\/p>\n<p>\u5f53\u4e00\u6b21 write() \u7684\u6570\u636e\u91cf\u4e0d\u5927\u4e8e PIPE_BUF \u65f6&#xff0c;Linux \u4fdd\u8bc1\u8fd9\u6b21\u5199\u5165\u4e0d\u4f1a\u548c\u5176\u4ed6\u8fdb\u7a0b\u7684\u5c0f\u5757\u5199\u5165\u4ea4\u53c9\u6df7\u5408\u3002<\/p>\n<p>\u4f8b\u5982\u4e24\u4e2a\u8fdb\u7a0b\u540c\u65f6\u5199&#xff1a;<\/p>\n<p>\u8fdb\u7a0b A&#xff1a;AAAA<br \/>\n\u8fdb\u7a0b B&#xff1a;BBBB<\/p>\n<p>\u5982\u679c\u6bcf\u6b21\u5199\u5165\u90fd\u4e0d\u8d85\u8fc7 PIPE_BUF&#xff0c;\u53ef\u80fd\u5f97\u5230&#xff1a;<\/p>\n<p>AAAABBBB<\/p>\n<p>\u4e5f\u53ef\u80fd\u5f97\u5230&#xff1a;<\/p>\n<p>BBBBAAAA<\/p>\n<p>\u4f46\u4e0d\u4f1a\u628a\u4e24\u6b21\u5199\u5165\u6495\u88c2\u6210&#xff1a;<\/p>\n<p>AABABBAB<\/p>\n<p>\u8fd9\u91cc\u4fdd\u8bc1\u7684\u662f<font color=\"#2E7D32\">\u540c\u4e00\u6b21\u5c0f\u5757\u5199\u5165\u7684\u5b8c\u6574\u6027<\/font>&#xff0c;\u4e0d\u662f\u4fdd\u8bc1\u8c01\u5148\u5199&#xff0c;\u4e5f\u4e0d\u662f\u4fdd\u8bc1 read() \u4e00\u6b21\u6070\u597d\u8bfb\u5230\u4e00\u6761\u5b8c\u6574\u6d88\u606f\u3002<\/p>\n<hr \/>\n<h2>\u603b\u7ed3<\/h2>\n<p>\u533f\u540d\u7ba1\u9053\u771f\u6b63\u9700\u8981\u8bb0\u4f4f\u7684&#xff0c;\u4e0d\u662f\u67d0\u4e00\u6bb5\u56fa\u5b9a\u4ee3\u7801&#xff0c;\u800c\u662f\u7236\u5b50\u8fdb\u7a0b\u548c\u5185\u6838\u8d44\u6e90\u4e4b\u95f4\u7684\u5173\u7cfb&#xff1a;<\/p>\n<p>\u5199\u8fdb\u7a0b\u7528\u6237\u7a7a\u95f4<br \/>\n      \u2193 write<br \/>\n\u5185\u6838\u7ba1\u9053\u7f13\u51b2\u533a<br \/>\n      \u2193 read<br \/>\n\u8bfb\u8fdb\u7a0b\u7528\u6237\u7a7a\u95f4<\/p>\n<p>pipefd[0] \u662f\u8bfb\u7aef&#xff0c;pipefd[1] \u662f\u5199\u7aef\u3002fork() \u4ee5\u540e&#xff0c;\u7236\u5b50\u8fdb\u7a0b\u6709\u5404\u81ea\u7684 fd \u8868&#xff0c;\u4f46\u8fd9\u4e9b fd \u53ef\u4ee5\u7ee7\u7eed\u5f15\u7528\u540c\u4e00\u6761\u5185\u6838\u7ba1\u9053\u3002<\/p>\n<p><font color=\"#1E88E5\">\u540e\u9762\u5f88\u591a\u73b0\u8c61\u90fd\u7531\u201c\u8fd8\u6709\u6ca1\u6709\u8bfb\u7aef\u3001\u8fd8\u6709\u6ca1\u6709\u5199\u7aef\u201d\u51b3\u5b9a&#xff1a;<\/font><\/p>\n<ul>\n<li>\u7ba1\u9053\u4e3a\u7a7a\u4e14\u5199\u7aef\u4ecd\u5b58\u5728&#xff0c;\u963b\u585e\u8bfb\u4f1a\u7b49\u5f85&#xff1b;<\/li>\n<li>\u7ba1\u9053\u5199\u6ee1\u4e14\u8bfb\u7aef\u4ecd\u5b58\u5728&#xff0c;\u963b\u585e\u5199\u4f1a\u7b49\u5f85&#xff1b;<\/li>\n<li>\u6240\u6709\u5199\u7aef\u5173\u95ed\u5e76\u4e14\u6570\u636e\u8bfb\u5b8c&#xff0c;read() \u8fd4\u56de 0&#xff1b;<\/li>\n<li>\u6240\u6709\u8bfb\u7aef\u5173\u95ed&#xff0c;\u7ee7\u7eed\u5199\u4f1a\u89e6\u53d1 SIGPIPE&#xff1b;<\/li>\n<li>\u7ba1\u9053\u5bb9\u91cf\u51b3\u5b9a\u80fd\u88c5\u591a\u5c11\u6570\u636e&#xff0c;PIPE_BUF \u89e3\u51b3\u7684\u662f\u5c0f\u5757\u5199\u5165\u539f\u5b50\u6027&#xff0c;\u4e24\u8005\u4e0d\u662f\u4e00\u56de\u4e8b\u3002<\/li>\n<\/ul>\n<p>\u628a\u8fd9\u4e9b\u89c4\u5219\u7406\u6e05\u4ee5\u540e&#xff0c;\u4e0b\u7bc7\u7684\u8fdb\u7a0b\u6c60\u5c31\u4e0d\u518d\u53ea\u662f\u201c\u7167\u7740\u4ee3\u7801\u6572\u201d&#xff0c;\u800c\u662f\u80fd\u770b\u61c2\u4e3a\u4ec0\u4e48\u6bcf\u4e2a\u5b50\u8fdb\u7a0b\u90fd\u5fc5\u987b\u5173\u95ed\u90a3\u4e9b\u770b\u8d77\u6765\u65e0\u5173\u7684 fd\u3002<\/p>\n<hr \/>\n<p>\u8d44\u6e90\u5206\u4eab&#xff1a;  \u8fdb\u7a0b\u95f4\u901a\u4fe1\u76f8\u5173\u4ee3\u7801 \u3010Linux\u3011\u6ca1\u6709\u516c\u7f51 IP \u4e5f\u80fd SSH \u56de\u5185\u7f51&#xff1a;\u53cd\u5411 SSH\u3001ProxyJump \u4e0e systemd \u4fdd\u6d3b\u5b9e\u6218<\/p>\n<p>\u3010Linux\u3011\u7cfb\u7edf\u5f7b\u5e95\u8fdb\u4e0d\u53bb\u600e\u4e48\u529e&#xff1f;initramfs\u3001recovery \u4e0e chroot 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