在linux壳牌在C程序更改工作目录 [英] Changing Working Directories in linux shell in a C Program

问题描述

好了，所以我的目标是写一个C程序就像是Linux的一个基本的shell。我除了改变工作目录一切工作正常。我曾尝试输入字符串system（）的CD和什么都没有发生。我也试过CHDIR（tokened串），也没有运气。任何人有什么想法？这是我的code的一部分：

Okay so my goal is to write a C program that is like a basic shell for Linux. I have everything working except changing working directories. I have tried the system() for input strings for cd and nothing happened. I also tried chdir("tokened string") and also no luck. Anyone have any ideas? This is part of my code:

        fgets(cmdStr, sizeof(cmdStr), stdin);

        if( strncmp("quit", cmdStr, 4) == 0 || strncmp("Quit", cmdStr, 4) == 0  )
        {
            break;
        }
        else if( strncmp("cd", cmdStr, 2) == 0 )
        {
            char *token = strtok(cmdStr, " ");
            token = strtok(NULL, " ");
            chdir(token);
        }
        else
        {
            system(cmdStr);
        }
    }

是否有可能做到这一点？或者这是一些简单的情况下，做不能够做某些事情的孩子的壳呢？谢谢！

Is it possible to do this? Or is this a simple case of something to do with the child shell not being able to do certain things? Thanks!

编辑：code以上完成

Code above is complete.

解决，与fgets增加了\\ n字符串。通过code去了，在tokened串摆脱了\\ n和CD的作品没有问题。感谢大家的帮助。

Solved, fgets adds a \n to the string. Went through the code and got rid of the \n in the tokened string and the cd works without a problem. Thanks for the help everyone.

推荐答案

与fgets（）叶尾随的'\\ n'字符 cmdstr 。

如果您键入 CD富，你会打电话给 CHDIR（富\\ n），而不是 CHDIR（富）。

If you type cd foo, you'll call chdir("foo\n") rather than chdir("foo").

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