Run dmidecode to dump all entries found.

Return all entries for a given dmi type, same format as produced by 'dmidecode -t <n>'.

return data for line matching fieldName in given struct typefieldName must be all non-whitespace chars at beginning of desired line, i.e.

Nth entry for a particular type, with N starting at 0.

Returns the result of 'dmidecode -s <key>'.

effectively mocks this package by pre-populating the cache and only allowing cache lookups.