如何从Linux Shell运行与当前工作目录不同的程序? [英] How do I run a program with a different working directory from current, from Linux shell?

问题描述

使用 Linux shell ，如何使用与当前工作目录不同的工作目录启动程序?

Using a Linux shell, how do I start a program with a different working directory from the current working directory?

例如，我有一个二进制文件helloworld，可在当前目录中创建文件hello-world.txt.

此文件位于目录/a中.

For example, I have a binary file helloworld that creates the file hello-world.txt in the current directory.

This file is inside of directory /a.

当前，我在目录/b中.我想启动运行../a/helloworld的程序，并将hello-world.txt放在第三个目录/c中.

Currently, I am in the directory /b. I want to start my program running ../a/helloworld and get the hello-world.txt somewhere in a third directory /c.

推荐答案

像这样调用程序:

(cd /c; /a/helloworld)

括号引起子壳的产生.然后，该子外壳将其工作目录更改为/c，然后从/a执行helloworld.程序退出后，子Shell终止，返回到您从其开始的目录中的父Shell提示符.

The parentheses cause a sub-shell to be spawned. This sub-shell then changes its working directory to /c, then executes helloworld from /a. After the program exits, the sub-shell terminates, returning you to your prompt of the parent shell, in the directory you started from.

错误处理::为避免在未更改目录的情况下运行程序，例如/c拼写错误时，请按条件执行helloworld:

Error handling: To avoid running the program without having changed the directory, e.g. when having misspelled /c, make the execution of helloworld conditional:

(cd /c && /a/helloworld)

减少内存使用量:为避免在hello world执行时子外壳浪费内存，请通过exec调用helloworld:

Reducing memory usage: To avoid having the subshell waste memory while hello world executes, call helloworld via exec:

(cd /c && exec /a/helloworld)

[感谢

[Thanks to Josh and Juliano for giving tips on improving this answer!]

这篇关于如何从Linux Shell运行与当前工作目录不同的程序?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！