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From: mcdermot@merlin.UUCP
Newsgroups: comp.dcom.lans
Subject: Re: Connecting a printer to an Ethernet
Message-ID: <422@unmvax.unm.edu>
Date: Thu, 12-Mar-87 12:19:25 EST
Article-I.D.: unmvax.422
Posted: Thu Mar 12 12:19:25 1987
Date-Received: Sat, 14-Mar-87 20:36:16 EST
References: <5923@charlie.UUCP> <57700001@umn-cs.UUCP>
Sender: news@unmvax.unm.edu
Reply-To: mcdermot@merlin.UUCP (John McDermott)
Organization: University of New Mexico, Albuquerque
Lines: 73

I have connected a printer to a Bridge using lpr.  Here is the printcap entry:

office:for printed mail:\
	:lp=/dev/null:sd=/usr/spool/bpd:\
	:lf=/usr/adm/lpd-errs:\
	:if=/etc/lproffice:\
	:rf=/usr/ucb/fpr:

Here is the source for lproffice: The clue is to use telnet which the bridge
understands.  The name of this file should be '/etc/lproffice' because
it users the trailing part of the filename to do the printer selection.

I'm sorry there are not more comments.  This was a quick hack and I had no
intent of distributing it.  Also, please forgive me for including source
here (that is flame /dev/null for all such complaints!).

#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <stdio.h>
#include <signal.h>
#include <netdb.h>

main(ac,av)
int ac;
char *av[];
{
	int c;
	struct sockaddr_in server;
	struct servent *sp;
	struct hostent *hp;
	FILE *printer;
	int s;

loop:
	sp = getservbyname("telnet","tcp");
	/* running code named lprxxxx where xxxx is printer Bridge name*/
	hp = gethostbyname(av[0]+3);
	if(hp == NULL){
		fprintf(stderr,"lpfilter: unknown printer: %s\n",av[0]+3);
		exit(2);
	}
	bzero((char *)&server,sizeof(server));
	bcopy(hp -> h_addr,(char *)&server.sin_addr,hp->h_length);
	server.sin_family = hp->h_addrtype;
	server.sin_port = sp->s_port;
	s = socket (AF_INET, SOCK_STREAM,0);
	if(connect(s,(char *)&server,sizeof(server))<0){
		perror("lpfilter: cannot connect");
		exit (2);
	}
	printer = fdopen(s,"w");
	/* boy, lpd is a mess! */
	while ( (c = getchar()) != EOF){
	    if(c == '\n') fprintf(printer,"\n\r        ");
	    else if(c == '\031') {
		if (( c = getchar()) == '\01'){
			fflush(printer);
			kill(getpid(),SIGSTOP);
			continue;
		}
		else {
			ungetc(c,stdin);
			c = '\031';
		}
	    }
	    putc(c,printer);
	}
	exit(0);
}
John McDermott			{gatech|ucbvax|lanl}!unmvax!mcdermot
Univ of NM			W (505) 277-4650 
Albuquerque, NM 87131		H (505) 255-7796