--- lp_server.c.orig	2001-09-18 03:51:31 +0400

+++ src/lp_server.c	2006-02-03 22:02:21 +0300

@@ -4,8 +4,9 @@

     Export a printer by simulating an HP JetDirect interface.

     -n connection port (default 9100)

     -w open output device write only (default r/w)

-    -d device (default /dev/lp)

+    -d device (default /dev/lp0)

     -t stty_cmds - stty commands to apply if device is serial port

+	-b - run in background mode

     The lp_server will bind to the connection port, and wait for

     an incoming connection.  After accepting a  connection, it 

@@ -30,10 +31,11 @@

 #include <version.h>

-char *device = "/dev/lp";

+char *device = "/dev/lp0";

 char *stty_opts;

 char *port = "9100";

 int write_only;

+int background;

 void usage(void);

 int sock, conn, dev = -1;

 int pid;

@@ -55,7 +57,7 @@

 	fd_set readfds;

 	name = argv[0];

-	while( ((c = getopt(argc, argv, "D:n:wd:t:r:")) != EOF) ){

+	while( ((c = getopt(argc, argv, "D:n:wd:t:r:b")) != EOF) ){

 		switch(c){

 		case 'D': debug = atoi(optarg); break;

 		case 'n': port = optarg; break;

@@ -63,11 +65,27 @@

 		case 'r': restrict = optarg; break;

 		case 'd': device = optarg; break;

 		case 't': stty_opts = optarg; break;

+		case 'b': background = 1; break;

 		default: usage();

 		}

 	}

 	if( optind != argc ) usage();

+	/* fork to background, write pid file, fall to lp user (uid 4) */

+	if( background ) {

+		FILE  *f;

+		daemon( 0, 0 );

+		f = fopen("/var/run/lp_server.pid", "w");

+		if (f) {

+			fprintf(f, "%d\n", getpid());

+			fclose(f);

+		} else

+			if( debug ) log(1,"can't create pid file");

+		 /* fall to lp user  */

+		if ( setuid(4) )

+			exit(1);

+	}

+	

 	/* step 1 - bind to the port */

 	sock = tcp_open( port );

 	if( sock < 0 ) exit(1);

@@ -231,12 +249,13 @@

 }

 char *msg[] = {

-"lp_server [-n port] [-w] [-d device] [-t stty_cmds]",

+"lp_server [-n port] [-w] [-d device] [-t stty_cmds] [-b]",

 "   Version " VERSION ,

 "    Export a printer by simulating an HP JetDirect interface.",

 "    -n connection port (default 9100)",

 "    -w open output device write only (default r/w)",

-"    -d device (default /dev/lp)",

+"    -d device (default /dev/lp0)",

+"    -b run in background mode",

 "    -t stty_cmds - stty commands to apply if device is serial port",

 "    -r remote_list - remote hosts allowed, in IP/netmask or hostname",

 "           separated by commas. i.e. - 130.191.20.10/24,dickory would",