LP(7)               (Board Software Extension)              LP(7)



  NAME
       lp - line printer interface

  DESCRIPTION
       lp provides the interface to any of the standard
       Printronix-type parallel line printers or the standard
       Centronics-type parallel line printers.  When the device is
       opened or closed, a suitable number of page ejects are
       generated.  Bytes written are printed using a buffered
       interface.

       The driver supports the printable ASCII character set (96
       characters) and correctly interprets carriage returns,
       backspaces, tabs, and form-feeds.  The defaults for line
       length, indent, and lines per page are 132, 4, and 66,
       respectively.  Lines longer than the line length minus the
       indent (i.e., 128 characters, using the above defaults) are
       truncated.  These defaults can be accessed and modified with
       an external program using the following calls.

       The four ioctl(2) system calls available are of the
       following form:

            #include <sys/lprio.h>
            ioctl(fildes, command, arg)
            struct lprio *arg;

       The commands are:

       LPRGET         Get the current indent, columns per line, and
                      lines per page and store in the lprio
                      structure referenced by arg.

       LPRSET         Set the current indent, columns per line, and
                      lines per page from the structure referenced
                      by arg.

       LPRRAW         Disable canonical processing and put the
                      printer in raw mode.  In raw mode, no
                      processing is done on the output characters.


  Page 1                                                   May 1989

  LP(7)               (Board Software Extension)              LP(7)



       LPRCAN         Enable canonical processing.  This is the
                      default state.

  FILES
       /dev/lp*

  SEE ALSO
       lp(1), ioctl(2), lp335(7).


































  Page 2                                                   May 1989