Gah! I hate
it when people only think of user programs
and not obvious libc
Prototyped in <stdlib.h>, setenv() sets an environment variable. It takes three args: the first a name string, the second a value string, and the third an int Boolean for whether or not it should be overwritten if it already exists.
int setenv( const char *name, const char *value, int overwrite );
There is also getenv()
which gets a value, and unsetenv()
it. Both of these take one arg: a name string