如何从流程中获取系统环境变量 [英] How to get system environment variable from within the process

问题描述

您好，



我遇到了一个问题，我需要获取系统中设置的环境变量X的值。这是一个子进程A，由另一个进程B启动，将X重置为某个错误的值，因此当我为X执行GetEnvironMentVariable时，它返回错误的值...我需要在此编写的原始系统环境值系统的注册表。是否有任何API可以作为标准用户完成此操作....我不想启动另一个shell来实现这一目标。你们有类似的东西吗？



谢谢！

Hello,

I am facing a problem where I need to fetch the value of an environment variable X set in the system. This is a child process A which is being launched by another process B that resets X to some wrong value and thus when I do GetEnvironMentVariable for X, it returns me wrong value...I need the origional system environment value that is written in this system's registry. Is there any API to get this done as a standard user....I don't want to launch another shell to achieve this. Do you guys know something like that?

Thanks!

推荐答案

你在谈论 getenv [ ^ ]？它是一个标准的C库API（推荐用于可移植代码）。



Windows也有GetEnvironmentVariable（）和你似乎知道的SetEnvironmentVariable（）。一旦设置了变量，就会设置它。没有存储在任何地方的缓存或历史记录。

Are you talking about getenv[^] ? It is a standard C library API (recommended for portable code).

Windows also has GetEnvironmentVariable() amd SetEnvironmentVariable() which you seem to know about. Once a variable has been set, it is set. There is no caching or history that is stored anywhere.

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