From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Tue, 6 Mar 2018 07:25:32 +0000 (+0100)
Subject: base-files: sysupgrade: do not rely on opkg to list changed conffiles
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=17c0362178caf837680a4631b8d0de94e5393448;p=openwrt%2Fstaging%2Fhauke.git

base-files: sysupgrade: do not rely on opkg to list changed conffiles

Many packages use the opkg conffiles field to list configuration files that
are to be retained on upgrades. Make this work on systems without opkg.

Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
---

diff --git a/package/base-files/Makefile b/package/base-files/Makefile
index 3fcf20a844..38d72fd452 100644
--- a/package/base-files/Makefile
+++ b/package/base-files/Makefile
@@ -11,7 +11,7 @@ include $(INCLUDE_DIR)/kernel.mk
 include $(INCLUDE_DIR)/version.mk
 
 PKG_NAME:=base-files
-PKG_RELEASE:=173.3
+PKG_RELEASE:=173.4
 PKG_FLAGS:=nonshared
 
 PKG_FILE_DEPENDS:=$(PLATFORM_DIR)/ $(GENERIC_PLATFORM_DIR)/base-files/
diff --git a/package/base-files/files/sbin/sysupgrade b/package/base-files/files/sbin/sysupgrade
index c095ca81c5..71c7faa6db 100755
--- a/package/base-files/files/sbin/sysupgrade
+++ b/package/base-files/files/sbin/sysupgrade
@@ -101,12 +101,31 @@ EOF
 # prevent messages from clobbering the tarball when using stdout
 [ "$CONF_BACKUP" = "-" ] && export VERBOSE=0
 
+
+list_conffiles() {
+	awk '
+		BEGIN { conffiles = 0 }
+		/^Conffiles:/ { conffiles = 1; next }
+		!/^ / { conffiles = 0; next }
+		conffiles == 1 { print }
+	' /usr/lib/opkg/status
+}
+
+list_changed_conffiles() {
+	# Cannot handle spaces in filenames - but opkg cannot either...
+	list_conffiles | while read file csum; do
+		[ -r "$file" ] || continue
+
+		echo "${csum}  ${file}" | sha256sum -sc - || echo "$file"
+	done
+}
+
 add_uci_conffiles() {
 	local file="$1"
 	( find $(sed -ne '/^[[:space:]]*$/d; /^#/d; p' \
 		/etc/sysupgrade.conf /lib/upgrade/keep.d/* 2>/dev/null) \
 		-type f -o -type l 2>/dev/null;
-	  opkg list-changed-conffiles ) | sort -u > "$file"
+	  list_changed_conffiles ) | sort -u > "$file"
 	return 0
 }