slib --version (return code: 0)
slib
slib --help (return code: 1)
Usage: slib [--version | -v]
Display version information and exit successfully.
Usage: slib SCHEME
Initialize SLIB in Scheme implementation SCHEME.
Usage: slib
Initialize SLIB session using executable (MIT) 'scheme', 'scm',
'gsi', 'mzscheme', 'guile', 'slib48', 'larceny', 'scmlit', 'elk',
'sisc', or 'kawa'.