diff -urN fwtk.orig/firewall.h fwtk/firewall.h
--- fwtk.orig/firewall.h	Sun Mar  1 15:54:20 1998
+++ fwtk/firewall.h	Fri Jul  9 13:36:14 1999
@@ -47,7 +47,7 @@
 system.
 */
 #ifndef	PERMFILE
-#define	PERMFILE	"/usr/local/etc/netperm-table"
+#define	PERMFILE	"/etc/fwtk/netperm-table"
 #endif
 
 /*
@@ -89,7 +89,7 @@
 makes no difference. make sure that whichever your machine uses
 is defined below.
 */
-#if defined(SYSV) || defined(SCO5) || defined(OSF1) || defined(AIX)
+#if defined(SYSV) || defined(SCO5) || defined(OSF1) || defined(AIX) || defined(linux)
 #define DIRECT_STRUCT   struct dirent 
 #else
 #define DIRECT_STRUCT   struct direct
@@ -102,7 +102,7 @@
 enables lockf() style locking.
 The locking primitives are implemented in lib/lock.c
 */
-#if defined(SYSV) || defined (HPUX) || defined(SCO5) || defined(AIX)
+#if defined(SYSV) || defined (HPUX) || defined(SCO5) || defined(AIX) || defined(linux)
 #define LOCK_LOCKF
 #else
 #define	LOCK_FLOCK