From: utzoo!decvax!ittvax!shp
Newsgroups: net.unix-wizards
Title: line printer problems
Article-I.D.: ittvax.520
Posted: Tue Nov 16 13:48:26 1982
Received: Wed Nov 17 02:18:04 1982

The problem with the lineprinter spooler is that it never closes files.
When the printer is left offline the spooler tries to open the printer
every minute to check the status.  Eventually 15 files are opened, the
spooler aborts on the 16th try and you're left with the lock file
hanging around and the spooler not running.  Make the following changes
to lpd.c and lpf.c and the problem should go away.  It did here at
ittvax.  The change to lpf.c is optional as it only outputs an offline
message to the console.

	- sam praul
	  ...!decvax!ittvax!shp

==========================================
diff /usr/new/src/cmd/lpr/lpd.c /usr/src/cmd/lpr/lpd.c

114d113
< 	fclose(fp);	/* off-line bug fix */
163,164c162
< 		if (send())	{
< 			fclose(dfb);	/* off-line bug fix */
---
> 		if (send())
166d163
< 		}


==========================================
diff /usr/new/src/cmd/lpr/lpf.c /usr/src/cmd/lpr/lpf.c
39d38
< 		console_msg("PRINTER ERROR: OFFLINE");
83d81
< 		console_msg("PRINTER ERROR:  IO ERROR");
323,336d320
< }
< 
< 
< /*  this routine outputs a message to the console 
<  */
< 
< console_msg(message)
< char *message;
< {
< 	FILE *con;
< 
< 	con = fopen("/dev/console","w");
< 	fprintf(con,"%s\n\r",message);
< 	fclose(con);

==========================================