Index: branches/releng-9.0/nanobsd/files/tools/sync-etc-changes-to-cf
===================================================================
--- branches/releng-9.0/nanobsd/files/tools/sync-etc-changes-to-cf	(revision 10600)
+++ branches/releng-9.0/nanobsd/files/tools/sync-etc-changes-to-cf	(revision 10600)
@@ -0,0 +1,60 @@
+#!/bin/sh
+#
+# Quick to do sync only the /etc (most) changed entry to permanent storage.
+#
+# Rick van der Zwet <rick@wirelessleiden.nl>
+#
+
+: ${VERBOSE=false}
+
+usage() {
+  cat <<EOF
+Usage: $0 [-v] <dryrun|sync>
+Options:
+  -v     - Verbose diffs
+Arguments:
+  dryrun - Check the pending changes
+  sync   - Sync the pending changes
+EOF
+  exit ${1:-128}
+}
+
+while [ -n "$1" ]; do
+  case "$1" in
+    "-v")
+      VERBOSE=true; shift
+      ;;
+    "dryrun")
+      SYNC=false; shift
+      ;;
+    "sync")
+      SYNC=true; shift
+      ;;
+    *)
+      echo "Invalid Argument -- $1"
+      usage
+      ;;
+   esac
+done
+[ -z "$SYNC" ] && usage
+
+trap "umount /cfg; mount -ur /" 1 2 15 EXIT
+mount -r /cfg
+$SYNC && mount -uwo noatime /
+
+for file in `find /conf/base/etc -type f`; do
+  live_file=${file##/conf/base}
+  conf_file=/cfg${file##/conf/base/etc}
+
+  # Do not sync files stored on the config mount
+  [ -r $conf_file ] && continue
+  
+  if ! cmp $file $live_file; then
+    $VERBOSE && diff $file $live_file
+    $SYNC && cp -v $live_file $file
+  fi
+done
+
+umount /cfg
+mount -ur /
+trap 1 2 15 EXIT