[package] base-files:

- add sysupgrade support for keepfile hints
		* introduces /lib/upgrade/keep.d/ for per-package keepfile lists
		* introduces /etc/sysupgrade.conf for user defined keepfile hints
	- prime /lib/upgrade/keep.d/base-files-essential to keep sysupgrade usable for images without opkg
	- change sysupgrade to build the keepfile list from /lib/upgrade/keep.d/, /etc/sysupgrade.conf and
	  opkg list-changed-conffiles


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@23258 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/base-files/Makefile

@@ -10,7 +10,7 @@ include $(TOPDIR)/rules.mk
 include $(INCLUDE_DIR)/kernel.mk
 
 PKG_NAME:=base-files
-PKG_RELEASE:=58
+PKG_RELEASE:=59
 
 PKG_FILE_DEPENDS:=$(PLATFORM_DIR)/ $(GENERIC_PLATFORM_DIR)/base-files/
 PKG_BUILD_DEPENDS:=opkg/host
@@ -54,6 +54,8 @@ define Package/base-files/conffiles
 /etc/shells
 /etc/sysctl.conf
 /etc/rc.local
+/etc/config/
+/etc/dropbear/
 $(call $(TARGET)/conffiles)
 endef
 

package/base-files/files/etc/sysupgrade.conf

@@ -0,0 +1,5 @@
+## This file contains files and directories that should
+## be preserved during an upgrade.
+
+# /etc/example.conf
+# /etc/openvpn/

package/base-files/files/lib/upgrade/keep.d/base-files-essential

@@ -0,0 +1,10 @@
+# Essential files that will be always kept
+/etc/banner
+/etc/hosts
+/etc/inittab
+/etc/group
+/etc/passwd
+/etc/profile
+/etc/shells
+/etc/sysctl.conf
+/etc/rc.local

package/base-files/files/sbin/sysupgrade

@@ -55,8 +55,9 @@ EOF
 
 add_uci_conffiles() {
 	local file="$1"
-	( find /etc/config /etc/passwd /etc/group /etc/dropbear \
-		/etc/firewall.user /etc/rc.local -type f;
+	( find $(sed -ne '/^[[:space:]]*$/d; /^#/d; p' \
+		/etc/sysupgrade.conf /lib/upgrade/keep.d/* 2>/dev/null) \
+		-type f 2>/dev/null;
 	  opkg list-changed-conffiles ) | sort -u > "$file"
 	return 0
 }