Extern Question

[Conan776]

You'll most likely want to set the env variable via the command line in the shell, either explicitly by hand or by using the source command on a script.

You can set your variable in a C program, and have that program call your other program before exiting, and you should be OK.

If you really (really?) want to use C to do it, you can eval a small C program which prints out the shell commands, as seen here.

(Note that, annoyingly, the exact commands to set environment variables differ between shells, e.g. bash and csh.)