modules/freifunk: add remote-update cli utility

2 files changed, 297 insertions, 0 deletions

diff --git a/modules/freifunk/root/etc/config/freifunk b/modules/freifunk/root/etc/config/freifunk
index 5c6f1ac79..49112894c 100644
--- a/modules/freifunk/root/etc/config/freifunk
+++ b/modules/freifunk/root/etc/config/freifunk
@@ -76,6 +76,8 @@ config defaults olsr_interface
 config defaults time
 	option rdate_servers "128.138.140.44 171.64.7.77 171.64.7.99 81.169.154.44 130.133.1.10"
 
+config defaults upgrade
+	option repository "http://dev.luci.freifunk-halle.net/freifunk-snapshots"
 
 config community leipzig
 	option name "Freifunk Leipzig"
diff --git a/modules/freifunk/root/usr/sbin/remote-update b/modules/freifunk/root/usr/sbin/remote-update
new file mode 100755
index 000000000..3cf085c11
--- /dev/null
+++ b/modules/freifunk/root/usr/sbin/remote-update
@@ -0,0 +1,295 @@
+#!/bin/sh
+
+local tempfile=/tmp/remote-upgrade.img
+local D2='\([0-9]\{2\}\)'
+local D4='\([0-9]\{4\}\)'
+local NL='
+'
+
+find_architecture()
+{
+	opkg list_installed 'base-files-*' | \
+		sed -ne 's/base-files-\([^ ]\+\).*/\1/p'
+}
+
+find_image()
+{
+	case "$1" in
+		atheros)
+			if grep -q '"vmlinux.bin.l7"' /proc/mtd; then
+				echo "openwrt-fonera-combined.img"
+			else
+				echo "openwrt-ubiquity-combined.img"
+			fi
+		;;
+		brcm-2.4)
+			echo "openwrt-brcm-2.4-squashfs.trx"
+		;;
+	esac
+}
+
+check_image()
+{
+	local file; for file in /lib/upgrade/*.sh; do . $file; done
+	if platform_check_image "$1" >/dev/null 2>/dev/null; then
+		return 0
+	fi
+	return 1
+}
+
+find_remote_checksum()
+{
+	wget -qO- ${1%/*}/md5sums 2>/dev/null | \
+		sed -ne '/'$2'/ { s/ .*//p }'
+}
+
+find_local_checksum()
+{
+	set -- $(md5sum "$tempfile")
+	echo $1
+}
+
+find_remote_version()
+{
+	wget -qO- "${1%/*}/VERSION.txt" 2>/dev/null | \
+		sed -ne "s!.*$D4/$D2/$D2 $D2:$D2.*!\\1\\2\\3\\4\\5!p;t"
+}
+
+find_local_version()
+{
+	if [ -f /rom/etc/banner ]; then
+		sed -ne "s!.*$D4/$D2/$D2 $D2:$D2.*!\\1\\2\\3\\4\\5!p;t" \
+			/rom/etc/banner
+	else
+		date +"%Y%m%d%H%M" -r /bin/sh
+	fi
+}
+
+stop_service()
+{
+	[ -x /etc/init.d/$1 ] && {
+		echo -n "Stopping service $1 ... "
+		/etc/init.d/$1 stop >/dev/null 2>/dev/null
+		echo "done"
+	}
+}
+
+do_wait()
+{
+	if [ ${1:-0} -gt 0 ]; then
+		echo -n "${2:-Waiting} "
+		for i in $(seq 1 $1); do
+			printf "%-2dseconds" $(($1-$i))
+			sleep 1
+			echo -en "\b\b\b\b\b\b\b\b\b"
+		done
+		echo "${NL}"
+	fi
+}
+
+version_compare()
+{
+	local v1="$1"
+	local v2="$2"
+
+	while [ -n "$v1" -o -n "$v2" ]; do
+		if [ -z "${v2:0:4}" -o "${v1:0:4}" -gt "${v2:0:4}" ]; then
+			return 1
+		elif [ -z "${v1:0:4}" -o "${v1:0:4}" -lt "${v2:0:4}" ]; then
+			return 2
+		fi
+
+		v1="${v1:4}"
+		v2="${v2:4}"
+	done
+
+	return 0
+}
+
+usage()
+{
+	cat <<EOT
+
+Usage:
+  remote-update -h
+  remote-update -c
+  remote-update -w
+  remote-update [-d] [-n] [-v] [-y] [-s <sleep seconds>] [-u <update url>]
+
+Actions:
+  -h    Display this help message and exit.
+  -c    Check for firmware update and exit.
+  -w    Fetch image and exit, do not perform flash write.
+
+Options:
+  -d    Do not detach from terminal.
+  -n    Do not backup configuration.
+  -v    Skip verification of downloaded image.
+  -y    Assume defaults for all questions.
+
+  -s <seconds>
+    Sleep given amount of seconds before invoking firmware burn.
+    If ommitted and '-y' is not used, 5 seconds are assumed.
+
+  -u <url>
+    Fetch firmware image from given url. A file "md5sums" is expected
+    in the same remote directory. If there is no such file, use -v to
+    suppress verification.
+
+EOT
+
+	exit 1
+}
+
+
+while getopts "s:u:cdnvwyh" flag; do
+	case $flag in
+		s) sleeptime="$OPTARG";;
+		u) updateurl="$OPTARG";;
+		c) checkupdate=1;;
+		d) nodetach=1;;
+		n) nobackup=1;;
+		v) noverify=1;;
+		w) noflash=1;;
+		y) noquestions=1;;
+		*) usage;;
+	esac
+done
+
+
+local image_url="$updateurl"
+local image_name="${image_url##*/}"
+
+[ -z "$image_url" ] && {
+	local arch=$(find_architecture)
+	local image=$(find_image "$arch")
+	local repo=$(uci get freifunk.upgrade.repository 2>/dev/null)
+
+	[ -z "$arch" ] && {
+		echo "Can not determine the current architecture."
+		exit 1
+	}
+
+	[ -z "$repo" ] && {
+		echo "No repository configured in 'freifunk.upgrade.repository'."
+		echo "Use the '-u' flag to specify an image location."
+		exit 1
+	}
+
+	[ -z "$image" ] && {
+		echo "No suitable image for the '$arch' architecture."
+		echo "Your platform is not supported."
+		exit 1
+	}
+
+	echo "Architecture: $arch"
+	echo "Repository:   $repo"
+
+	image_name="$image"
+	image_url="${repo%/}/$arch/$image"
+}
+
+
+if [ "$checkupdate" = 1 ]; then
+	local v1=$(find_local_version)
+	local v2=$(find_remote_version "$image_url")
+
+	[ -n "$v1" -a -n "$v2" ] && {
+		version_compare "$v1" "$v2"
+		[ $? == 2 ] && {
+			echo "Update available! $v1 -> $v2"
+		} || {
+			echo "Local version $v1 is up to date"
+		}
+	} || {
+		echo "No remote time stamp found."
+		exit 1
+	}
+else
+	if [ "$noquestions" != 1 ]; then
+		echo -n "${NL}About to download $image_name. Continue? [y] "
+		read answer
+		case "$answer" in
+			[nN]) exit 1;;
+		esac
+	fi
+
+	echo -n "Downloading $image_name ... "
+	rm -f $tempfile
+	wget -qO $tempfile "$image_url" 2>/dev/null
+	[ $? == 0 ] && echo done || {
+		echo failed
+		rm -f $tempfile
+		exit 1
+	}
+
+	if [ "$noverify" != 1 ]; then
+		echo -n "Verifying $image_name ... "
+
+		local md5_remote=$(find_remote_checksum "$image_url" "$image_name")
+		local md5_local=$(find_local_checksum)
+
+		check_image "$tempfile"
+		local image_ok=$?
+
+		if [ $image_ok = 0 -a -n "$md5_remote" -a -n "$md5_local" -a "$md5_remote" = "$md5_local" ]; then
+			echo "done"
+		else
+			if [ $image_ok != 0 ]; then
+				echo "unsupported image type"
+			else
+				echo "checksum mismatch! (local:${md5_local:-(none)} remote:${md5_remote:-(none)})"
+			fi
+
+			local answer=n
+			if [ "$noquestions" != 1 ]; then
+				echo -n "${NL}Verification failed. Continue anyway? [n] "
+				read answer
+			fi
+
+			case "$answer" in
+				[yYjJ]*) : ;;
+				*)
+					echo "Aborting."
+					rm -f $tempfile
+					exit 1
+				;;
+			esac
+		fi
+	fi
+
+	if [ "$noflash" != 1 ]; then
+		if [ -f "$tempfile" ]; then
+			if [ "$noquestions" == 1 ]; then
+				do_wait ${sleeptime:-5} "${NL}About to start flashing, hit <Ctrl-C> to abort!${NL}${NL}Starting in"
+			else
+				if [ -z "$nobackup" ]; then
+					echo -n "${NL}Keep configuration files? [y] "
+					read answer
+					case "$answer" in
+						[nN]) nobackup=1;;
+					esac
+				fi
+
+				echo -n "${NL}About to start flashing!${NL}Hit <Enter> to continue or <Ctrl-C> to abort.${NL}"
+				read answer
+			fi
+
+			for s in lucid collectd; do stop_service $s; done
+
+			if [ "$nodetach" != 1 ]; then
+				echo -n "Starting sysupgrade in background ... "
+				/bin/busybox start-stop-daemon -S -b -x /sbin/sysupgrade -- ${nobackup:+-n} "$tempfile"
+				echo "done"
+			else
+				echo "Executing sysupgrade ... "
+				exec /sbin/sysupgrade ${nobackup:+-n} "$tempfile"
+			fi
+		else
+			echo "No upgrade image found!"
+			exit 1
+		fi
+	else
+		echo "Image saved in '$tempfile'"
+	fi
+fi