A data.frame with three colums for key, value and (source) type.
Not all keys return a value; in those cases an empty string is returned.
Type is one of path, sys and conf and signals how the
value was obtained.
Arguments
path
An optional character object specifying a path. Default is the
current directory.
Author
Dirk Eddelbuettel
Details
This functions returns all configuration settings which can be queried
in a data.frame object. The system-level functions sysconf,
pathconf and confstr provide all the underlying information.