lqf(4)lqf(4)Namelqf - general purpose letter quality filter
/usr/lib/lpdfilters/lqf [-c] [-nlogin] [-hhost] [-wwidth] [-lnum]
[-iindent] [accounting file]
The filter is used to filter text data destined for a letter quality
printer, specifically the lqp02, but will work with any impact printer:
LP25, LP26, LP27, LA50, LA75, LA100, LA120, LA210, and LG01. The filter
allows escape characters and control sequences to pass through to the
printer. The filter handles the device dependencies of the printers
and performs accounting functions. Accounting records are written to
the file specified by the af field in at the time of completion for
The filter can handle plain ASCII files and files that have been pre‐
processed by However, it ignores escape sequences requesting super‐
scripting and subscripting.
The filter can be the specified filter in both the of and the if fields
in the file. For further information, see printcap 5 . When both
fields are specified, the of filter is used only to print the banner
page. It is then stopped to allow the if filter access to the printer.
The if filter maintains accounting information.
If the of field is the only one specified, the filter is used to print
the banner page. It is then stopped and restarted. This allows the of
filter to be used to maintain accounting information.
If the if field is the only one specified, the banner page will be sent
directly to the printer. This is not a problem for most impact print‐
ers. For a more detailed discussion on filters see the ``Line Printer
Spooler Manual'' in The Supplementary Documents.
The arguments passed to the filter depend on its use. The of filter is
called with the following arguments:
The width and length values come from the pw and pl fields in
the database. The if (or restarted of) filter is passed the fol‐
lqf-c -nlogin -hhost -wwidth -lnum -iindent accounting file
The -c flag is optional, and supplied only when control characters are
to be printed, that is, when the -l option of lpr(1) is used to print
the file. The -w and -l arguments are the same as for the of filter.
However, they may have different values if the -w or -z options of were
used to print the file. The -n and -h arguments specify the login name
and host name of the job owner. These arguments are used to record
accounting information. The -i option specifies the amount of indenta‐
tion to be used. The last argument is the name of the accounting file
specified from the af field in the database.
The lf field (default "/dev/null") in the database specifies error log‐
ging file name.
Printer Capabilities Database
lpr(1), pr(1), printcap(5), lpd(8), MAKEDEV(8), pac(8)
Line Printer Spooler Manual