Support input and output filters with remote printing.

Output filters are executed on a per-file basis as it's
necessary to supply the file size to the "other side".

1 files changed, 28 insertions, 1 deletions

diff --git a/share/man/man5/printcap.5 b/share/man/man5/printcap.5
index 6ec84f4..de12ae1 100644
--- a/share/man/man5/printcap.5
+++ b/share/man/man5/printcap.5
@@ -30,7 +30,7 @@
 .\" SUCH DAMAGE.
 .\"
 .\"     @(#)printcap.5	8.2 (Berkeley) 12/11/93
-.\"	$Id$
+.\"	$Id: printcap.5,v 1.9 1997/02/22 13:26:06 peter Exp $
 .\"
 .Dd December 11, 1993
 .Dt PRINTCAP 5
@@ -247,6 +247,33 @@ or using
 .Xr syslog 3 ,
 and must not ignore
 .Dv SIGINT . 
+.Sh REMOTE PRINTING
+When printing to a remote printer using
+.Cm rm ,
+it is possible to use either
+.Cm if
+or
+.Cm of . 
+If both are specified,
+.Cm of
+is ignored.  Both filters behave the same except that they are passed
+different arguments as above.  Specifically, the output filter is
+terminated and restarted for each file transmitted.  This is necessary
+in order to pass the resulting size to the remote
+.Xr lpd 8 .
+.Pp
+If the
+.Fl p
+flag was passed to
+.Xr lpr 1 ,
+.Xr pr 1
+is not executed locally, but is requested of the remote
+.Xr lpd 8 .
+Any input filtering via
+.Cm if
+will therefore happen before
+.Xr pr 1
+is executed rather than afterwards.
 .Sh LOGGING
 Error messages generated by the line printer programs themselves
 (that is, the