mfg
required manufacturer string
mdl
required model string
from
previous device number found in search, or NULL
for
new search
This walks through the list of parallel port devices looking
for a device whose 'MFG' string matches mfg
and whose 'MDL'
string matches mdl
in their IEEE 1284 Device ID.
When a device is found matching those requirements, its device number is returned; if there is no matching device, a negative value is returned.
A new search it initiated by passing NULL
as the from
argument. If from
is not NULL
, the search continues from
that device.