{"topic":{"id":13231,"title":"求问下 6.s081 的 lab1 的一个问题","slug":"topic","categoryId":54,"createdAt":"2024-08-07 07:53:46.540341","bumpedAt":"2024-08-07 08:38:59.365329","views":136,"postsCount":2,"highestPostNumber":2,"likeCount":0,"closed":false,"pinned":false,"pinnedGlobally":false,"pinnedAt":null,"pinnedUntil":null,"isBanner":false,"excerpt":"问题背景 Lab: Xv6 and Unix utilities (mit.edu) 问题描述我的 exec 好像没起作用？参数应该都是正常传递到了（命令行中可以输出），命令行中输入命令也可以得到正确的输出（hello），可是传递给 exec 没有任何输出，这个是怎么回事呢，谢谢大家源代码 xargs.c|attachment (2.4 KB)","deletedAt":null,"isAnonymous":false,"category":{"id":54,"name":"学术专区","slug":"academic","color":"9EB83B"},"author":{"id":125,"username":"Toki","name":null,"avatarUrl":"/uploads/image/07/38/0738f62d14ecade7c9fbee9d10b3011843d14da90bf4ab641fa59e53c9929454.avif"},"tags":[]},"posts":[{"id":38447,"postNumber":1,"raw":"\n#### 问题背景\n\n[Lab: Xv6 and Unix utilities (mit.edu)](https://pdos.csail.mit.edu/6.828/2023/labs/util.html)\n\n[grid mode=\"tile\"]\n![Pasted image 20240807154852|690x313](/uploads/image/a0/0d/a00d2fd94258da0b711b46dec696bf2ec3d48f467b20fe3d3379e74ce40bf75f.avif)\n![Pasted image 20240807154904|690x318](/uploads/image/03/45/03450a6b97fe55c4bcdb9d35be0b4a14058a2067b5fa4150230766879b662735.avif)\n![Pasted image 20240807154939|660x289](/uploads/image/7a/ba/7aba88df04c06976c3aa13cec3c595b36bef13b641814585cbfcb2df632695b0.avif)\n[/grid]\n\n\n\n#### 问题描述\n\n我的 exec 好像没起作用？参数应该都是正常传递到了（命令行中可以输出），命令行中输入命令也可以得到正确的输出（hello），可是传递给 exec 没有任何输出，这个是怎么回事呢，谢谢大家\n\n![69c38bd9a2ea5e6547a05959961dc8a6|690x369](/uploads/image/27/45/27456a4021db88300233a8b225f3cdc91374cba142c6296120f0267024a7234a.avif)\n\n\n#### 源代码\n\n[xargs.c|attachment](/uploads/blob/9f/57/9f57f5cc5f539ca69bb3344108523cb48e0f8145160a6454a94ac4e2b3572d70.c) (2.4 KB)","cooked":"

问题背景

Lab: Xv6 and Unix utilities (mit.edu)

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问题描述

我的 exec 好像没起作用？参数应该都是正常传递到了（命令行中可以输出），命令行中输入命令也可以得到正确的输出（hello），可是传递给 exec 没有任何输出，这个是怎么回事呢，谢谢大家

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源代码

xargs.c|attachment (2.4 KB)

\n","createdAt":"2024-08-07 07:53:46.807036","updatedAt":"2024-08-07 07:53:46.807036","replyToPostNumber":null,"replyCount":0,"likeCount":0,"wordCount":113,"liked":false,"bookmarked":false,"polls":[],"reactions":[],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":125,"username":"Toki","name":null,"avatarUrl":"/uploads/image/07/38/0738f62d14ecade7c9fbee9d10b3011843d14da90bf4ab641fa59e53c9929454.avif","admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}},{"id":38451,"postNumber":2,"raw":"已解决，问题出在我 exec 的参数数组的传递上，比如 exec 一个 grep 程序，则参数数组（即代码中的 args）的第一个元素应该是 grep","cooked":"

已解决，问题出在我 exec 的参数数组的传递上，比如 exec 一个 grep 程序，则参数数组（即代码中的 args）的第一个元素应该是 grep

\n","createdAt":"2024-08-07 08:38:59.365329","updatedAt":"2024-08-07 08:39:35.170012","replyToPostNumber":null,"replyCount":0,"likeCount":0,"wordCount":51,"liked":false,"bookmarked":false,"polls":[],"reactions":[],"wiki":false,"version":1,"publicVersion":1,"deletedAt":null,"isAnonymous":false,"user":{"id":125,"username":"Toki","name":null,"avatarUrl":"/uploads/image/07/38/0738f62d14ecade7c9fbee9d10b3011843d14da90bf4ab641fa59e53c9929454.avif","admin":false,"moderator":false,"signatureRaw":null,"signatureCooked":null}}],"hasMore":false,"lastReadPostNumber":1,"hasUrlPostNumber":false}