Fix GATEWAY (again) and add version checking between compiled programs and library

git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@3427 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb

Shorewall/compiler

@@ -1173,6 +1173,8 @@ ${INDENT}        fatal_error "Unable to detect the gateway through interface $in
 ${INDENT}    fi
 
 __EOF__
+	else
+	    save_command "gateway=$gateway"
 	fi
 
 	if [ x${mark} != x- ]; then
@@ -8439,8 +8441,14 @@ initialize() {
 __EOF__
     if [ -z "$EXPORT" ]; then
 	cat >&3 << __EOF__
-    if [ ! -f /usr/share/shorewall/version ] || [ \$(cat /usr/share/shorewall/version) != $VERSION ]; then
+    if [ ! -f /usr/share/shorewall/version ]; then
-	startup_error "This script requires Shorewall version $VERSION"
+	fatal_error "This script requires Shorewall which does not appear to be installed on this system"
+    fi
+
+    local version=\$(cat /usr/share/shorewall/version)
+
+    if [ \${LIBVERSION:-0} -lt 30105 ]; then
+	fatal_error "This script requires Shorewall version 3.1.5 or later; current version is \$version"
     fi
 
 __EOF__

Shorewall/functions

@@ -2,6 +2,8 @@
 #
 # Shorewall 3.2 -- /usr/share/shorewall/functions
 
+LIBVERSION=30105
+
 #
 # Message to stderr
 #

Shorewall/releasenotes.txt

@@ -40,6 +40,17 @@ Other changes in 3.1.5
     'generate' and 'reload' command have been removed. The 'reload' command
     has also been removed from the program generated by 'compile'.
 
+2)  Scripts compiled without the -e option are now more forgiving when run
+    on systems with a different Shorewall version installed. If the
+    installed version meets minimum version requirements, the script will
+    run -- it no longer requires an exact match.
+
+    That having been said, the minimum version required for scripts
+    compiled with 3.1.5 is 3.1.5. I plan to add new features to the library
+    (/usr/share/shorewall/functions) in advance of using them in compiled
+    scripts so that scripts compiled on one version of Shorewall should be
+    able to run on the next several newer minor releases.
+
 Migration Considerations:
 
 1)  A number of macros have been split into two.  The macros affected are: