PRINTCAP(5)                UNIX Programmer's Manual                PRINTCAP(5)

NAME
     printcap - printer capability data base

SYNOPSIS
     printcap

DESCRIPTION
     The Printcap function is a simplified version of the termcap(5) data base
     used to describe line printers.  The spooling system accesses the
     printcap file every time it is used, allowing dynamic addition and dele-
     tion of printers.  Each entry in the data base is used to describe one
     printer.  This data base may not be substituted for, as is possible for
     termcap,  because it may allow accounting to be bypassed.

     The default printer is normally lp, though the environment variable
     PRINTER may be used to override this.  Each spooling utility supports an
     option, -P printer, to allow explicit naming of a destination printer.

     Refer to the 4.3 BSD Line Printer Spooler Manual for a complete discus-
     sion on how setup the database for a given printer.

CAPABILITIES
     Refer to termcap(5) for a description of the file layout.

     Name       Type      Description
     af         str       NULL                   name of accounting file
     br         num       none                   if lp is a tty, set the baud
                                                 rate (ioctl(2) call)
     cf         str       NULL                   cifplot data filter
     df         str       NULL                   tex data filter (DVI format)
     fc         num       0                      if lp is a tty, clear flag
                                                 bits (sgtty.h)
     ff         str       `\f'                   string to send for a form
                                                 feed
     fo         bool      false                  print a form feed when device
                                                 is opened
     fs         num       0                      like `fc' but set bits
     gf         str       NULL                   graph data filter (plot(3)
                                                 format
     hl         bool      false                  print the burst header page
                                                 last
     ic         bool      false                  driver supports (non
                                                 standard) ioctl to indent
                                                 printout
     if         str       NULL                   name of text filter which
                                                 does accounting
     lf         str       /dev/console           error logging file name
     lo         str       lock                   name of lock file
     lp         str       /dev/lp                device name to open for
                                                 output
     mx         num       1000                   maximum file size (in BUFSIZ
                                                 blocks), zero = unlimited
     nd         str       NULL                   next directory for list of
                                                 queues (unimplemented)
     nf         str       NULL                   ditroff data filter (device
                                                 independent troff)
     of         str       NULL                   name of output filtering
                                                 program
     pc         num       200                    price per foot or page in
                                                 hundredths of cents
     pl         num       66                     page length (in lines)
     pw         num       132                    page width (in characters)
     px         num       0                      page width in pixels
                                                 (horizontal)
     py         num       0                      page length in pixels
                                                 (vertical)
     rf         str       NULL                   filter for printing FORTRAN
                                                 style text files
     rg         str       NULL                   restricted group. Only
                                                 members of group allowed
                                                 access
     rm         str       NULL                   machine name for remote
                                                 printer
     rp         str       ``lp''                 remote printer name argument
     rs         bool      false                  restrict remote users to
                                                 those with local accounts
     rw         bool      false                  open the printer device for
                                                 reading and writing
     sb         bool      false                  short banner (one line only)
     sc         bool      false                  suppress multiple copies
     sd         str       /var/spool/lpd         spool directory
     sf         bool      false                  suppress form feeds
     sh         bool      false                  suppress printing of burst
                                                 page header
     st         str       status                 status file name
     tf         str       NULL                   troff data filter (cat
                                                 phototypesetter)
     tr         str       NULL                   trailer string to print when
                                                 queue empties
     vf         str       NULL                   raster image filter

     If the local line printer driver supports indentation, the daemon must
     understand how to invoke it.

FILTERS
     The lpd(8) daemon creates a pipeline of filters to process files for var-
     ious printer types.  The filters selected depend on the flags passed to
     lpr(1).  The pipeline set up is:

           p       pr | if regular text + pr(1)
           none    if      regular text
           c       cf      cifplot
           d       df      DVI (tex)
           g       gf      plot(3)
           n       nf      ditroff
           f       rf      Fortran
           t       tf      troff
           v       vf      raster image

     The if filter is invoked with arguments:

           if [-c] -wwidth -llength -iindent -n login -h host acct-file

     The -c flag is passed only if the -l flag (pass control characters liter-
     ally) is specified to lpr.  The Width function and length specify the
     page width and length (from pw and pl respectively) in characters.  The
     -n and -h parameters specify the login name and host name of the owner of
     the job respectively.  The Acct-file function is passed from the af
     printcap entry.

     If no if is specified, of is used instead, with the distinction that of
     is opened only once, while if is opened for every individual job.  Thus,
     if is better suited to performing accounting.  The of is only given the
     width and length flags.

     All other filters are called as:

           filter -xwidth -ylength -n login -h host acct-file

     where width and length are represented in pixels, specified by the px and
     py entries respectively.

     All filters take stdin as the file, stdout as the printer, may log either
     to stderr or using syslog(3),  and must not ignore SIGINT.

LOGGING
     Error messages generated by the line printer programs themselves (that
     is, the lp*  programs) are logged by syslog(3) using the LPR facility.
     Messages printed on stderr of one of the filters are sent to the corre-
     sponding lf file.  The filters may, of course, use syslog themselves.

     Error messages sent to the console have a carriage return and a line feed
     appended to them, rather than just a line feed.

SEE ALSO
     termcap(5),  lpc(8),  lpd(8),  pac(8),  lpr(1),  lpq(1),  lprm(1)

     4.3 BSD Line Printer Spooler Manual.

HISTORY
     The printcap file format appeared in 4.2BSD..

4.2 Berkeley Distribution        May 10, 1991                                1