How to check and change environment variables in C

Hi,

I want to know how can I change and check environment variables in a C program. For instance I want to check $HOME or $PATH an change them

Thanks in advance

getenv() and setenv()

check your man pages for these functions.

It's putenv(). :D

Quote:

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Originally Posted by jim mcnamara

It's putenv(). :D

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setenv() gives you more control, check your man pages ;)

But neither of them change the parent environment.

If you program does putenv("PATH=foo");
Then running the program does NOT change the PATH in your shell.

Because you are running in a child process.

Thanks guys. Linux rules