procd: firstboot nand/ubi takeover support

[openwrt.git] / package / system / procd / files / nand-preinit.sh

diff --git a/package/system/procd/files/nand-preinit.sh b/package/system/procd/files/nand-preinit.sh
new file mode 100644 (file)
index 0000000..bd2193c
--- /dev/null
+++ b/package/system/procd/files/nand-preinit.sh
@@ -0,0 +1,17 @@
+#!/bin/sh
+# Copyright (C) 2014 OpenWrt.org
+
+nand_takeover() {
+       . /lib/upgrade/nand.sh
+       mtd=$(find_mtd_index "$CI_UBIPART")
+       local file_type="$(identify $2)"
+       mtd -l 400 dump /dev/mtd$mtd > /tmp/takeover.hdr
+       MAGIC=$(dd if=/tmp/takeover.hdr bs=1 skip=261 count=5 2> /dev/null)
+       SIZE=$(printf "%d" 0x$(dd if=/tmp/takeover.hdr bs=4 count=1 2> /dev/null | hexdump -v -n 4 -e '1/1 "%02x"'))
+       [ "$MAGIC" = "ustar" ] && {
+               mtd -l $((SIZE + 4))  dump /dev/mtd$mtd | dd bs=1 skip=4 of=/tmp/sysupgrade.tar
+               nand_do_upgrade_stage2 /tmp/sysupgrade.tar
+       }
+}
+
+boot_hook_add initramfs nand_takeover