diff -up wrk/wrudf/wrudf.c.wrk wrk/wrudf/wrudf.c

--- wrk/wrudf/wrudf.c.wrk	2013-04-15 15:32:03.395528452 +0200

+++ wrk/wrudf/wrudf.c	2013-04-15 16:06:37.535546730 +0200

@@ -603,6 +603,28 @@ parseCmnd(char* line)

     return cmnd;

 }

+int show_help()

+{

+	char *msg = 

+	"Interactive tool to maintain an UDF filesystem.\n"

+	"Usage:\n"

+	"\twrudf [device]\n"

+	"Available commands:\n"

+	"\tcp\n"

+	"\trm\n"

+	"\tmkdir\n"

+	"\trmdir\n"

+	"\tlsc\n"

+	"\tlsh\n"

+	"\tcdc\n"

+	"\tcdh\n"

+	"Specify cdh/lsh or cdc/lsc to do cd or ls for Harddisk or CompactDisc.\n"

+	"\tquit\n"

+	"\texit\n";

+	printf("%s", msg);

+	return 0;

+}

+

 int

 main(int argc, char** argv) 

 { 

@@ -614,8 +636,14 @@ main(int argc, char** argv)

     printf("wrudf " WRUDF_VERSION "\n");

     devicename= "/dev/cdrom";

-    if(argc > 1 )

+    if(argc > 1 ) {

+	if (strcmp(argv[1], "-h")==0 || strcmp(argv[1], "-help")==0 || strcmp(argv[1], "--help")==0) {

+	    return show_help();

+	}

+    }

+    else {

 	devicename = argv[1];			/* can specify disk image filename */

+    }

     if( setpriority(PRIO_PROCESS, 0, -10) ) {

 	printf("setpriority(): %m\n");