在perl中实现bash命令cd [英] implement bash command cd in perl

问题描述

我试图在perl中实现bash命令 system("cd/home/user")，但是出现错误提示

I tried to implement a bash command system("cd /home/user") in perl , but I get an error saying

Can't exec "cd": No such file or directory at temp.pl 

是否可以将当前工作目录更改为指定的目录，并且在退出perl脚本后仍保留更改.

Is there a way to change the current working directory to the specified one , and the change remains after the perl script has exited also.

推荐答案

否.进程无法更改其父进程的当前工作目录.外壳程序将诸如 cd 之类的命令实现为"builtins"，这意味着它们是外壳程序本身的功能，而不是单独运行的进程.

No. A process can't change its parent process's current working directory. Shells implement commands like cd as "builtins", meaning they're a function in the shell itself, and not a separate process that gets run.

您可以使用 chdir($ dir)在perl中更改当前目录，并且该更改将由子进程继承-但不会传递给父进程.

You can change the current directory in perl using chdir($dir), and that change will be inherited by child processes — but it won't be passed along to the parent process.

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