diff -N -r --unified=5 usblock.old2/lockd/lockd.c usblock/lockd/lockd.c
--- usblock.old2/lockd/lockd.c	2007-03-04 06:52:47.000000000 +0100
+++ usblock/lockd/lockd.c	2007-03-04 06:48:51.000000000 +0100
@@ -24,19 +24,23 @@
 -o set transmitter going out of bounds script
 -t set sleep time between polls (in seconds)
 -k set key (in the form 0,66,66,3)
 -p set user-pidfile 
 -d daemonize
+-c continue normal operation although /dev/lock0 cannot be opened, use this if
+   it is intended that the daemon should run even if the device is not plugged
+   in or is being removed and plugged in again during operation
 
 //maybe add different keys for different scripts later
 */
 
 char *key=NULL;
 char *script_in=NULL;
 char *script_out=NULL;
 int sleep_time=8;
 int daemonize=0;
+int allow_offline=0;
 char *lock_file=NULL; //this holds the output of /dev/lock0
 int lock_file_len;
 char *pid_filename=NULL;//this is the pid filename
 FILE *pid_file=NULL;//pid file handle
 pid_t pid=0;//our process id for lockd
@@ -73,12 +77,14 @@
 	signal(SIGUSR1, SIG_IGN);
 }
 
 int GetOptions(int argc,const char* argv[]) {
 	int opt;
-	while((opt = getopt(argc,(char* const *)argv,"di:o:k:t:p:")) != -1) {
+	while((opt = getopt(argc,(char* const *)argv,"cdi:o:k:t:p:")) != -1) {
 		switch(opt) {
+			case 'c':   allow_offline=1;
+				break;
 			case 'd':   daemonize=1;
 				break;
 			case 'i':
 				script_in=strdup(optarg);
 //				printf("Setting In-Range executable to:%s\n",script_in);
@@ -150,13 +156,19 @@
 	}else printf("Starting usblock-daemon Copyright (c) 2006 Tim 'pez2001' Theede.\n");
 
 	while(1)  { //start of daemon loop
 		f=fopen("/dev/lock0","r");
 		if(f==NULL) {
-			if(daemonize)syslog(LOG_NOTICE,"error can't open file: '/dev/lock0'");
-			else printf("error can't open file: '/dev/lock0'\n");
-			return(0);
+			if(allow_offline) {
+				sleep(sleep_time);
+				continue;
+			}
+			else {
+				if(daemonize)syslog(LOG_NOTICE,"error can't open file: '/dev/lock0'");
+				else printf("error can't open file: '/dev/lock0'\n");
+				return(0);
+			}
 		}
 		lock_file=(char*)malloc(256);
 		memset(lock_file,0,256);
 		//fseek(f,0,SEEK_SET);
 		lock_file_len=fread(lock_file,1,255,f);