Looks up the value of the environment variable name.

Returns Some(value) if the variable is set (including the empty string), None if it is unset. Wraps libc::getenv, which returns a pointer into the environ block — this function copies the bytes into a Kestrel String immediately, so the result is safe to keep across subsequent setenv / unsetenv calls.

Examples

match getenv(name: "HOME") { .Some(path) => print(path), .None => print("HOME not set") }