Hi,

I know theres a function out there in C to read and write enviornment variables. Could someone tell me what it is and describe its basic use? This would be for a linux system of course!

Thanks again,
Scrag

See these man pages:

getenv(3) clearenv(3), putenv(3), setenv(3), unsetenv(3), environ(7)

Thanks!

Well,
I used the following line of code to set the environment variable, but when I use the "env" commnad from console, I dont see it.
Is there something im doing wrong?

Thanks!

Once your C program ends, the environment your program was running in ends also and reverts back to the environment that you were using before you ran your program.

An attempt to clarify that some more: each process has it's own set of environment vars. But each process inherits (gets a copy) of the environment of its parent process.

When you start a program from a shell, the shell will be the parent of the process the program is running in. So the program gets a copy of the environment the shell has. Now if the program creates/changes environment vars, it does so in its own copy of the environment, which is discarded when the program exits.

There's no single way around this. If it were possible to get around this, it would be a security hole.

What you can do, is setting environment vars in your program and start another shell from your program with execl("/bin/bash") for example. The new shell then gets a copy of the environment from your program.

Thanks for the explanation. You guys kick @ss!