A mod_info
represents an existing, installed module and its runtime
physical location (usually in the file system).
mod_info(spec, source_path)pkg_info(spec)
mod_info
and pkg_info
return a structure representing
the module/package information for the given specification/source location.
a mod_spec
or pkg_spec
(for mod_info
and
pkg_info
, respectively)
character string full path to the physical module location.