--- lockdev-1.0.1/src/lockdev.c.subdir	2005-02-23 12:57:52.253199688 +0100
+++ lockdev-1.0.1/src/lockdev.c	2005-02-23 13:08:27.193674064 +0100
@@ -245,10 +245,19 @@
 	char * name;
 	const char * dev;
 {
-	int l;
-	_debug( 3, "_dl_filename_2 (dev=%s)\n", dev);
+	int l, x;
+	char *p;
+	
 	/* lockfile of type /var/lock/LCK..ttyS2 */
+	_debug( 3, "_dl_filename_2 (dev=%s)\n", dev);
+	x = strlen(LOCK_PATH) + 6;	/* 6= strlen("/LCK..") */
 	l = sprintf( name, "%s/LCK..%s", LOCK_PATH, dev);
+	
+	/* replace '/' by '_' for /dev sub-dirs (like pppd does it)
+	 */
+	while ((p = strchr(name+x, '/')) != NULL) {
+	    *p = '_';
+	}
 	_debug( 2, "_dl_filename_2 () -> len=%d, name=%s<\n", l, name);
 	return l;
 }