luci-app-advanced-reboot: show OpenWrt info on compatible NAND routers

Signed-off-by: Stan Grishin <stangri@melmac.net>

1 files changed, 260 insertions, 181 deletions

diff --git a/applications/luci-app-advanced-reboot/luasrc/controller/advanced_reboot.lua b/applications/luci-app-advanced-reboot/luasrc/controller/advanced_reboot.lua
index 6b8cba4c40..8b97f2e560 100644
--- a/applications/luci-app-advanced-reboot/luasrc/controller/advanced_reboot.lua
+++ b/applications/luci-app-advanced-reboot/luasrc/controller/advanced_reboot.lua
@@ -3,203 +3,282 @@
 
 module("luci.controller.advanced_reboot", package.seeall)
 
+local util = require "luci.util"
+local fs = require "nixio.fs"
+local sys = require "luci.sys"
+local http = require "luci.http"
+local dispatcher = require "luci.dispatcher"
+local i18n = require "luci.i18n"
+local ltemplate = require "luci.template"
+local ip = require "luci.ip"
+local http = require "luci.http"
+local sys = require "luci.sys"
+local dispatcher = require "luci.dispatcher"
+local uci = require "luci.model.uci".cursor()
+
+function is_alt_mountable(p1_mtd, p2_mtd)
+	if p1_mtd:sub(1,3) == "mtd" and
+				 p2_mtd:sub(1,3) == "mtd" and
+				 fs.access("/usr/sbin/ubiattach") and
+				 fs.access("/usr/sbin/ubiblock") and 
+				 fs.access("/bin/mount") then
+		return true
+	else
+		return false
+	end
+end
+
+function get_partition_os_info(op_ubi)
+	local cp_info, ap_info
+	if fs.access("/etc/os-release") then
+		cp_info = util.trim(util.exec('. /etc/os-release && echo "$PRETTY_NAME"'))
+	end
+	alt_partition_unmount(op_ubi)
+	alt_partition_mount(op_ubi)
+	if fs.access("/alt/rom/etc/os-release") then
+		ap_info = util.trim(util.exec('. /alt/rom/etc/os-release && echo "$PRETTY_NAME"'))
+	end
+	alt_partition_unmount(op_ubi)
+	return cp_info, ap_info
+end
+
+function alt_partition_mount(op_ubi)
+	local ubi_dev
+	util.exec('for i in rom overlay firmware; do [ ! -d "$i" ] && mkdir -p "/alt/${i}"; done')
+	util.exec("ubidetach -m " .. tostring(op_ubi))
+	ubi_dev = tostring(util.exec("ubiattach -m " .. tostring(op_ubi)))
+	_, _, ubi_dev = ubi_dev:find("UBI device number (%d+)")
+	if not ubi_dev then 
+		util.exec("ubidetach -m " .. tostring(op_ubi))
+		return 
+	end
+	util.exec("ubiblock --create /dev/ubi" .. ubi_dev .. "_0")
+	util.exec("mount -t squashfs -o ro /dev/ubiblock" .. ubi_dev .. "_0 /alt/rom")
+	util.exec("mount -t ubifs /dev/ubi1_" .. ubi_dev .. " /alt/overlay")
+	util.exec("mount -t overlay overlay -o noatime,lowerdir=/alt/rom,upperdir=/alt/overlay/upper,workdir=/alt/overlay/work /alt/firmware")
+end
+
+function alt_partition_unmount(op_ubi)
+	util.exec("umount /alt/firmware")
+	util.exec("umount /alt/overlay")
+	util.exec("umount /alt/rom")
+	util.exec("ubiblock --remove /dev/ubi1_0")
+	util.exec("ubidetach -m " .. tostring(op_ubi))
+	util.exec('rm -rf /alt')
+end
+
 devices = {
-  -- deviceName, boardName, partition1, partition2, offset, envVar1, envVar1Value1, envVar1Value2, envVar2, envVar2Value1, envVar2Value2
-  {"Linksys EA3500", "linksys-audi", "mtd3", "mtd5", 32, "boot_part", 1, 2, "bootcmd", "run nandboot", "run altnandboot"},
-  {"Linksys E4200v2/EA4500", "linksys-viper", "mtd3", "mtd5", 32, "boot_part", 1, 2, "bootcmd", "run nandboot", "run altnandboot"},
-  {"Linksys EA6350v3", "linksys-ea6350v3", "mtd10", "mtd12", 192, "boot_part", 1, 2},
-  {"Linksys EA8300", "linksys-ea8300", "mtd10", "mtd12", 192, "boot_part", 1, 2},
-  {"Linksys EA8500", "ea8500", "mtd13", "mtd15", 32, "boot_part", 1, 2},
+	-- deviceName, boardName, part1MTD, part2MTD, offset, envVar1, envVar1Value1, envVar1Value2, envVar2, envVar2Value1, envVar2Value2
+	{"Linksys EA3500", "linksys-audi", "mtd3", "mtd5", 32, "boot_part", 1, 2, "bootcmd", "run nandboot", "run altnandboot"},
+	{"Linksys E4200v2/EA4500", "linksys-viper", "mtd3", "mtd5", 32, "boot_part", 1, 2, "bootcmd", "run nandboot", "run altnandboot"},
+	{"Linksys EA6350v3", "linksys-ea6350v3", "mtd10", "mtd12", 192, "boot_part", 1, 2},
+	{"Linksys EA8300", "linksys-ea8300", "mtd10", "mtd12", 192, "boot_part", 1, 2},
+	{"Linksys EA8500", "ea8500", "mtd13", "mtd15", 32, "boot_part", 1, 2},
 --  {"Linksys EA9500", "linksys-panamera", "mtd3", "mtd6", 28, "boot_part", 1, 2},
-  {"Linksys WRT1200AC", "linksys-caiman", "mtd4", "mtd6", 32, "boot_part", 1, 2, "bootcmd", "run nandboot", "run altnandboot"},
-  {"Linksys WRT1900AC", "linksys-mamba", "mtd4", "mtd6", 32, "boot_part", 1, 2, "bootcmd", "run nandboot", "run altnandboot"},
-  {"Linksys WRT1900ACv2", "linksys-cobra", "mtd4", "mtd6", 32, "boot_part", 1, 2, "bootcmd", "run nandboot", "run altnandboot"},
-  {"Linksys WRT1900ACS", "linksys-shelby", "mtd4", "mtd6", 32, "boot_part", 1, 2, "bootcmd", "run nandboot", "run altnandboot"},
-  {"Linksys WRT3200ACM", "linksys-rango", "mtd5", "mtd7", 32, "boot_part", 1, 2, "bootcmd", "run nandboot", "run altnandboot"},
-  {"Linksys WRT32X", "linksys-venom", "mtd5", "mtd7", nil, "boot_part", 1, 2, "bootcmd", "run nandboot", "run altnandboot"},
-  {"ZyXEL NBG6817","nbg6817","mmcblk0p4","mmcblk0p7", 32, nil, 255, 1}
+	{"Linksys WRT1200AC", "linksys-caiman", "mtd4", "mtd6", 32, "boot_part", 1, 2, "bootcmd", "run nandboot", "run altnandboot"},
+	{"Linksys WRT1900AC", "linksys-mamba", "mtd4", "mtd6", 32, "boot_part", 1, 2, "bootcmd", "run nandboot", "run altnandboot"},
+	{"Linksys WRT1900ACv2", "linksys-cobra", "mtd4", "mtd6", 32, "boot_part", 1, 2, "bootcmd", "run nandboot", "run altnandboot"},
+	{"Linksys WRT1900ACS", "linksys-shelby", "mtd4", "mtd6", 32, "boot_part", 1, 2, "bootcmd", "run nandboot", "run altnandboot"},
+	{"Linksys WRT3200ACM", "linksys-rango", "mtd5", "mtd7", 32, "boot_part", 1, 2, "bootcmd", "run nandboot", "run altnandboot"},
+	{"Linksys WRT32X", "linksys-venom", "mtd5", "mtd7", nil, "boot_part", 1, 2, "bootcmd", "run nandboot", "run altnandboot"},
+	{"ZyXEL NBG6817", "nbg6817", "mmcblk0p4", "mmcblk0p7", 32, nil, 255, 1}
 }
 
-errorMessage = nil
-rom_board_name = luci.util.trim(luci.sys.exec("cat /tmp/sysinfo/board_name"))
+-- local errorMessage, d
+-- local device_name, p1_mtd, p2_mtd, offset, bev1, bev1p1, bev1p2, bev2, bev2p1, bev2p2
+romBoardName = util.trim(util.exec("cat /tmp/sysinfo/board_name"))
+
 for i=1, #devices do
-  device_board_name = devices[i][2]:gsub('%p','')
-  if rom_board_name and rom_board_name:gsub('%p',''):match(device_board_name) then
-    device_name = devices[i][1]
-    partition_one_mtd = devices[i][3] or nil
-    partition_two_mtd = devices[i][4] or nil
-    partition_skip = devices[i][5] or nil
-    boot_envvar1 = devices[i][6] or nil
-    boot_envvar1_partition_one = tonumber(devices[i][7]) or nil
-    boot_envvar1_partition_two = tonumber(devices[i][8]) or nil
-    boot_envvar2 = devices[i][9] or nil
-    boot_envvar2_partition_one = devices[i][10] or nil
-    boot_envvar2_partition_two = devices[i][11] or nil
-    if partition_one_mtd and partition_skip then
-      partition_one_label = luci.util.trim(luci.sys.exec("dd if=/dev/" .. partition_one_mtd .. " bs=1 skip=" .. partition_skip .. " count=128" .. "  2>/dev/null"))
-      n, partition_one_version = string.match(partition_one_label, '(Linux)-([%d|.]+)')
-    end
-    if partition_two_mtd and partition_skip then
-      partition_two_label = luci.util.trim(luci.sys.exec("dd if=/dev/" .. partition_two_mtd .. " bs=1 skip=" .. partition_skip .. " count=128" .. "  2>/dev/null"))
-      n, partition_two_version = string.match(partition_two_label, '(Linux)-([%d|.]+)')
-    end
-    if partition_one_label and string.find(partition_one_label, "LEDE") then partition_one_os = "LEDE" end
-    if partition_one_label and string.find(partition_one_label, "OpenWrt") then partition_one_os = "OpenWrt" end
-    if partition_one_label and string.find(partition_one_label, "Linksys") then partition_one_os = "Linksys" end
-    if partition_two_label and string.find(partition_two_label, "LEDE") then partition_two_os = "LEDE" end
-    if partition_two_label and string.find(partition_two_label, "OpenWrt") then partition_two_os = "OpenWrt" end
-    if partition_two_label and string.find(partition_two_label, "Linksys") then partition_two_os = "Linksys" end
-    if device_name and device_name == "ZyXEL NBG6817" then
-      if not partition_one_os then partition_one_os = "ZyXEL" end
-      if not partition_two_os then partition_two_os = "ZyXEL" end
-    end
-    if device_name and device_name == "Linksys WRT32X" then
-      if not partition_one_os then partition_one_os = "Unknown/Compressed" end
-      if not partition_two_os then partition_two_os = "Unknown/Compressed" end
-    end
-    if not partition_one_os then partition_one_os = "Unknown" end
-    if not partition_two_os then partition_two_os = "Unknown" end
-    if partition_one_os and partition_one_version then partition_one_os = partition_one_os .. " (Linux " .. partition_one_version .. ")" end
-    if partition_two_os and partition_two_version then partition_two_os = partition_two_os .. " (Linux " .. partition_two_version .. ")" end
+	d = devices[i][2]:gsub('%p','')
+	if romBoardName and romBoardName:gsub('%p',''):match(d) then
+		device_name = devices[i][1]
+		p1_mtd = devices[i][3] or nil
+		p2_mtd = devices[i][4] or nil
+		offset = devices[i][5] or nil
+		bev1 = devices[i][6] or nil
+		bev1p1 = tonumber(devices[i][7]) or nil
+		bev1p2 = tonumber(devices[i][8]) or nil
+		bev2 = devices[i][9] or nil
+		bev2p1 = devices[i][10] or nil
+		bev2p2 = devices[i][11] or nil
+		if p1_mtd and offset then
+			p1_label = util.trim(util.exec("dd if=/dev/" .. p1_mtd .. " bs=1 skip=" .. offset .. " count=128" .. "  2>/dev/null"))
+			n, p1_version = p1_label:match('(Linux)-([%d|.]+)')
+		end
+		if p2_mtd and offset then
+			p2_label = util.trim(util.exec("dd if=/dev/" .. p2_mtd .. " bs=1 skip=" .. offset .. " count=128" .. "  2>/dev/null"))
+			n, p2_version = p2_label:match('(Linux)-([%d|.]+)')
+		end
+		if p1_label and p1_label:find("LEDE") then p1_os = "LEDE" end
+		if p1_label and p1_label:find("OpenWrt") then p1_os = "OpenWrt" end
+		if p1_label and p1_label:find("Linksys") then p1_os = "Linksys" end
+		if p2_label and p2_label:find("LEDE") then p2_os = "LEDE" end
+		if p2_label and p2_label:find("OpenWrt") then p2_os = "OpenWrt" end
+		if p2_label and p2_label:find("Linksys") then p2_os = "Linksys" end
+		if device_name == "ZyXEL NBG6817" then
+			if not p1_os then p1_os = "ZyXEL" end
+			if not p2_os then p2_os = "ZyXEL" end
+		end
+		if device_name == "Linksys WRT32X" then
+			if not p1_os then p1_os = "Unknown/Compressed" end
+			if not p2_os then p2_os = "Unknown/Compressed" end
+		end
+		if not p1_os then p1_os = "Unknown" end
+		if not p2_os then p2_os = "Unknown" end
+		if p1_os and p1_version then p1_os = p1_os .. " (Linux " .. p1_version .. ")" end
+		if p2_os and p2_version then p2_os = p2_os .. " (Linux " .. p2_version .. ")" end
 
-    if device_name and device_name == "ZyXEL NBG6817" then
-      if not zyxelFlagPartition then zyxelFlagPartition = luci.util.trim(luci.sys.exec("source /lib/functions.sh; find_mtd_part 0:DUAL_FLAG")) end
-      if not zyxelFlagPartition then
-        errorMessage = errorMessage or "" .. luci.i18n.translate("Unable to find Dual Boot Flag Partition." .. " ")
-        luci.util.perror(luci.i18n.translate("Unable to find Dual Boot Flag Partition."))
-      else
-        current_partition = tonumber(luci.sys.exec("dd if=" .. zyxelFlagPartition .. " bs=1 count=1 2>/dev/null | hexdump -n 1 -e '1/1 \"%d\"'"))
-      end
-    else
-      if nixio.fs.access("/usr/sbin/fw_printenv") and nixio.fs.access("/usr/sbin/fw_setenv") then
-        current_partition = tonumber(luci.util.trim(luci.sys.exec("/usr/sbin/fw_printenv -n " .. boot_envvar1)))
-      end
-    end
-    other_partition = current_partition == boot_envvar1_partition_two and boot_envvar1_partition_one or boot_envvar1_partition_two
-  end
+		if device_name == "ZyXEL NBG6817" then
+			if not zyxelFlagPartition then zyxelFlagPartition = util.trim(util.exec(". /lib/functions.sh; find_mtd_part 0:DUAL_FLAG")) end
+			if not zyxelFlagPartition then
+				errorMessage = errorMessage or "" .. i18n.translate("Unable to find Dual Boot Flag Partition." .. " ")
+				util.perror(i18n.translate("Unable to find Dual Boot Flag Partition."))
+			else
+				current_partition = tonumber(util.exec("dd if=" .. zyxelFlagPartition .. " bs=1 count=1 2>/dev/null | hexdump -n 1 -e '1/1 \"%d\"'"))
+			end
+		else
+			if fs.access("/usr/sbin/fw_printenv") and fs.access("/usr/sbin/fw_setenv") then
+				current_partition = tonumber(util.trim(util.exec("fw_printenv -n " .. bev1)))
+			end
+		end
+		other_partition = current_partition == bev1p2 and bev1p1 or bev1p2
+		
+		if is_alt_mountable(p1_mtd, p2_mtd) then
+			if current_partition == bev1p1 then
+				op_ubi = tonumber(p2_mtd:sub(4)) + 1
+			else
+				op_ubi = tonumber(p1_mtd:sub(4)) + 1
+			end
+			local cp_info, ap_info = get_partition_os_info(op_ubi)
+			if current_partition == bev1p1 then
+				p1_os = cp_info or p1_os
+				p2_os = ap_info or p2_os
+			else
+				p1_os = ap_info or p1_os
+				p2_os = cp_info or p2_os
+			end
+		end
+	end
 end
 
 function index()
-  entry({"admin", "system", "advanced_reboot"}, template("advanced_reboot/advanced_reboot"), _("Advanced Reboot"), 90)
-  entry({"admin", "system", "advanced_reboot", "reboot"}, post("action_reboot"))
-  entry({"admin", "system", "advanced_reboot", "alternative_reboot"}, post("action_altreboot"))
-  entry({"admin", "system", "advanced_reboot", "power_off"}, post("action_poweroff"))
+	entry({"admin", "system", "advanced_reboot"}, template("advanced_reboot/advanced_reboot"), _("Advanced Reboot"), 90)
+	entry({"admin", "system", "advanced_reboot", "reboot"}, post("action_reboot"))
+	entry({"admin", "system", "advanced_reboot", "alternative_reboot"}, post("action_altreboot"))
+	entry({"admin", "system", "advanced_reboot", "power_off"}, post("action_poweroff"))
 end
 
 function action_reboot()
-  local uci = require "luci.model.uci".cursor()
-  local ip  = uci:get("network", "lan", "ipaddr")
-  luci.template.render("advanced_reboot/applyreboot", {
-        title = luci.i18n.translate("Rebooting..."),
-        msg   = luci.i18n.translate("The system is rebooting now.<br /> DO NOT POWER OFF THE DEVICE!<br /> Wait a few minutes before you try to reconnect. It might be necessary to renew the address of your computer to reach the device again, depending on your settings."),
-        addr  = luci.ip.new(type(ip) == "string" and ip or "192.168.1.1") or "192.168.1.1"
-      })
-  luci.sys.reboot()
+	ltemplate.render("admin_system/applyreboot", {
+				title = i18n.translate("Rebooting..."),
+				msg   = i18n.translate("The system is rebooting now.<br /> DO NOT POWER OFF THE DEVICE!<br /> Wait a few minutes before you try to reconnect. It might be necessary to renew the address of your computer to reach the device again, depending on your settings."),
+				addr  = ip.new(type(ip) == "string" and ip or "192.168.1.1") or "192.168.1.1"
+			})
+	sys.reboot()
 end
 
 function action_altreboot()
-  local uci = require "luci.model.uci".cursor()
-  local zyxelFlagPartition, zyxelBootFlag, zyxelNewBootFlag, errorCode, curEnvSetting, newEnvSetting
-  errorMessage = nil
-  errorCode = 0
-  if luci.http.formvalue("cancel") then
-    luci.http.redirect(luci.dispatcher.build_url('admin/system/advanced_reboot'))
-    return
-  end
-  local step = tonumber(luci.http.formvalue("step") or 1)
-  if step == 1 then
-    if device_name and nixio.fs.access("/usr/sbin/fw_printenv") and nixio.fs.access("/usr/sbin/fw_setenv") then
-      luci.template.render("advanced_reboot/alternative_reboot",{})
-    else
-      luci.template.render("advanced_reboot/advanced_reboot",{errorMessage = luci.i18n.translate("No access to fw_printenv or fw_printenv!")})
-    end
-  elseif step == 2 then
-    if boot_envvar1 or boot_envvar2 then -- Linksys devices
-      if boot_envvar1 then
-        curEnvSetting = tonumber(luci.util.trim(luci.sys.exec("/usr/sbin/fw_printenv -n " .. boot_envvar1)))
-        if not curEnvSetting then
-          errorMessage = errorMessage .. luci.i18n.translate("Unable to obtain firmware environment variable") .. ": " .. boot_envvar1 .. ". "
-          luci.util.perror(luci.i18n.translate("Unable to obtain firmware environment variable") .. ": " .. boot_envvar1 .. ".")
-        else
-          newEnvSetting = curEnvSetting == boot_envvar1_partition_one and boot_envvar1_partition_two or boot_envvar1_partition_one
-          errorCode = luci.sys.call("/usr/sbin/fw_setenv " .. boot_envvar1 .. " " .. newEnvSetting)
-            if errorCode ~= 0 then
-              errorMessage = errorMessage or "" .. luci.i18n.translate("Unable to set firmware environment variable") .. ": " .. boot_envvar1 .. " " .. luci.i18n.translate("to") .. " " .. newEnvSetting .. ". "
-              luci.util.perror(luci.i18n.translate("Unable to set firmware environment variable") .. ": " .. boot_envvar1 .. " " .. luci.i18n.translate("to") .. " " .. newEnvSetting .. ".")
-            end
-        end
-      end
-      if boot_envvar2 then
-        curEnvSetting = luci.util.trim(luci.sys.exec("/usr/sbin/fw_printenv -n " .. boot_envvar2))
-        if not curEnvSetting then
-          errorMessage = errorMessage or "" .. luci.i18n.translate("Unable to obtain firmware environment variable") .. ": " .. boot_envvar2 .. ". "
-          luci.util.perror(luci.i18n.translate("Unable to obtain firmware environment variable") .. ": " .. boot_envvar2 .. ".")
-        else
-          newEnvSetting = curEnvSetting == boot_envvar2_partition_one and boot_envvar2_partition_two or boot_envvar2_partition_one
-          errorCode = luci.sys.call("/usr/sbin/fw_setenv " .. boot_envvar2 .. " '" .. newEnvSetting .. "'")
-          if errorCode ~= 0 then
-            errorMessage = errorMessage or "" .. luci.i18n.translate("Unable to set firmware environment variable") .. ": " .. boot_envvar2 .. " " .. luci.i18n.translate("to") .. " " .. newEnvSetting .. ". "
-            luci.util.perror(luci.i18n.translate("Unable to set firmware environment variable") .. ": " .. boot_envvar2 .. " " .. luci.i18n.translate("to") .. " " .. newEnvSetting .. ".")
-          end
-        end
-      end
-    else -- NetGear device
-      if not zyxelFlagPartition then zyxelFlagPartition = luci.util.trim(luci.sys.exec("source /lib/functions.sh; find_mtd_part 0:DUAL_FLAG")) end
-      if not zyxelFlagPartition then
-        errorMessage = errorMessage .. luci.i18n.translate("Unable to find Dual Boot Flag Partition." .. " ")
-        luci.util.perror(luci.i18n.translate("Unable to find Dual Boot Flag Partition."))
-      else
-        zyxelBootFlag = tonumber(luci.sys.exec("dd if=" .. zyxelFlagPartition .. " bs=1 count=1 2>/dev/null | hexdump -n 1 -e '1/1 \"%d\"'"))
-        zyxelNewBootFlag = zyxelBootFlag and zyxelBootFlag == 1 and "\\xff" or "\\x01"
-        if zyxelNewBootFlag then
-          errorCode = luci.sys.call("printf \"" .. zyxelNewBootFlag .. "\" >" .. zyxelFlagPartition )
-          if errorCode ~= 0 then
-            errorMessage = errorMessage or "" .. luci.i18n.translate("Unable to set Dual Boot Flag Partition entry for partition") .. ": " .. zyxelFlagPartition .. ". "
-            luci.util.perror(luci.i18n.translate("Unable to set Dual Boot Flag Partition entry for partition") .. ": " .. zyxelFlagPartition .. ".")
-          end
-        end
-      end
-    end
-    if not errorMessage then
-      luci.template.render("advanced_reboot/applyreboot", {
-            title = luci.i18n.translate("Rebooting..."),
-            msg   = luci.i18n.translate("The system is rebooting to an alternative partition now.<br /> DO NOT POWER OFF THE DEVICE!<br /> Wait a few minutes before you try to reconnect. It might be necessary to renew the address of your computer to reach the device again, depending on your settings."),
-            addr  = luci.ip.new(uci:get("network", "lan", "ipaddr")) or "192.168.1.1"
-          })
-      luci.sys.reboot()
-    else
-      luci.template.render("advanced_reboot/advanced_reboot",{
-        rom_board_name=rom_board_name,
-        device_name=device_name,
-        boot_envvar1_partition_one=boot_envvar1_partition_one,
-        partition_one_os=partition_one_os,
-        boot_envvar1_partition_two=boot_envvar1_partition_two,
-        partition_two_os=partition_two_os,
-        current_partition=current_partition,
-        errorMessage = errorMessage})
-    end
-  end
+	local zyxelFlagPartition, zyxelBootFlag, zyxelNewBootFlag, errorCode, curEnvSetting, newEnvSetting
+	errorMessage = nil
+	errorCode = 0
+	if http.formvalue("cancel") then
+		http.redirect(dispatcher.build_url('admin/system/advanced_reboot'))
+		return
+	end
+	local step = tonumber(http.formvalue("step") or 1)
+	if step == 1 then
+		if fs.access("/usr/sbin/fw_printenv") and fs.access("/usr/sbin/fw_setenv") then
+			ltemplate.render("advanced_reboot/alternative_reboot",{})
+		else
+			ltemplate.render("advanced_reboot/advanced_reboot",{errorMessage = i18n.translate("No access to fw_printenv or fw_printenv!")})
+		end
+	elseif step == 2 then
+		if bev1 or bev2 then -- Linksys devices
+			if bev1 then
+				curEnvSetting = tonumber(util.trim(util.exec("fw_printenv -n " .. bev1)))
+				if not curEnvSetting then
+					errorMessage = errorMessage .. i18n.translate("Unable to obtain firmware environment variable") .. ": " .. bev1 .. ". "
+					util.perror(i18n.translate("Unable to obtain firmware environment variable") .. ": " .. bev1 .. ".")
+				else
+					newEnvSetting = curEnvSetting == bev1p1 and bev1p2 or bev1p1
+					errorCode = sys.call("fw_setenv " .. bev1 .. " " .. newEnvSetting)
+						if errorCode ~= 0 then
+							errorMessage = errorMessage or "" .. i18n.translate("Unable to set firmware environment variable") .. ": " .. bev1 .. " " .. i18n.translate("to") .. " " .. newEnvSetting .. ". "
+							util.perror(i18n.translate("Unable to set firmware environment variable") .. ": " .. bev1 .. " " .. i18n.translate("to") .. " " .. newEnvSetting .. ".")
+						end
+				end
+			end
+			if bev2 then
+				curEnvSetting = util.trim(util.exec("fw_printenv -n " .. bev2))
+				if not curEnvSetting then
+					errorMessage = errorMessage or "" .. i18n.translate("Unable to obtain firmware environment variable") .. ": " .. bev2 .. ". "
+					util.perror(i18n.translate("Unable to obtain firmware environment variable") .. ": " .. bev2 .. ".")
+				else
+					newEnvSetting = curEnvSetting == bev2p1 and bev2p2 or bev2p1
+					errorCode = sys.call("fw_setenv " .. bev2 .. " '" .. newEnvSetting .. "'")
+					if errorCode ~= 0 then
+						errorMessage = errorMessage or "" .. i18n.translate("Unable to set firmware environment variable") .. ": " .. bev2 .. " " .. i18n.translate("to") .. " " .. newEnvSetting .. ". "
+						util.perror(i18n.translate("Unable to set firmware environment variable") .. ": " .. bev2 .. " " .. i18n.translate("to") .. " " .. newEnvSetting .. ".")
+					end
+				end
+			end
+		else -- NetGear device
+			if not zyxelFlagPartition then zyxelFlagPartition = util.trim(util.exec(". /lib/functions.sh; find_mtd_part 0:DUAL_FLAG")) end
+			if not zyxelFlagPartition then
+				errorMessage = errorMessage .. i18n.translate("Unable to find Dual Boot Flag Partition." .. " ")
+				util.perror(i18n.translate("Unable to find Dual Boot Flag Partition."))
+			else
+				zyxelBootFlag = tonumber(util.exec("dd if=" .. zyxelFlagPartition .. " bs=1 count=1 2>/dev/null | hexdump -n 1 -e '1/1 \"%d\"'"))
+				zyxelNewBootFlag = zyxelBootFlag and zyxelBootFlag == 1 and "\\xff" or "\\x01"
+				if zyxelNewBootFlag then
+					errorCode = sys.call("printf \"" .. zyxelNewBootFlag .. "\" >" .. zyxelFlagPartition )
+					if errorCode ~= 0 then
+						errorMessage = errorMessage or "" .. i18n.translate("Unable to set Dual Boot Flag Partition entry for partition") .. ": " .. zyxelFlagPartition .. ". "
+						util.perror(i18n.translate("Unable to set Dual Boot Flag Partition entry for partition") .. ": " .. zyxelFlagPartition .. ".")
+					end
+				end
+			end
+		end
+		if not errorMessage then
+			ltemplate.render("admin_system/applyreboot", {
+						title = i18n.translate("Rebooting..."),
+						msg   = i18n.translate("The system is rebooting to an alternative partition now.<br /> DO NOT POWER OFF THE DEVICE!<br /> Wait a few minutes before you try to reconnect. It might be necessary to renew the address of your computer to reach the device again, depending on your settings."),
+						addr  = ip.new(uci:get("network", "lan", "ipaddr")) or "192.168.1.1"
+					})
+			sys.reboot()
+		else
+			ltemplate.render("advanced_reboot/advanced_reboot",{
+				romBoardName=romBoardName,
+				device_name=device_name,
+				bev1p1=bev1p1,
+				p1_os=p1_os,
+				bev1p2=bev1p2,
+				p2_os=p2_os,
+				current_partition=current_partition,
+				errorMessage = errorMessage})
+		end
+	end
 end
 
 function action_poweroff()
-  local uci = require "luci.model.uci".cursor()
-  if luci.http.formvalue("cancel") then
-    luci.http.redirect(luci.dispatcher.build_url('admin/system/advanced_reboot'))
-    return
-  end
-  local step = tonumber(luci.http.formvalue("step") or 1)
-  if step == 1 then
-    if nixio.fs.access("/sbin/poweroff") then
-      luci.template.render("advanced_reboot/power_off",{})
-    else
-      luci.template.render("advanced_reboot/advanced_reboot",{})
-    end
-  elseif step == 2 then
-    luci.template.render("advanced_reboot/applyreboot", {
-          title = luci.i18n.translate("Shutting down..."),
-          msg   = luci.i18n.translate("The system is shutting down now.<br /> DO NOT POWER OFF THE DEVICE!<br /> It might be necessary to renew the address of your computer to reach the device again, depending on your settings."),
-          addr  = luci.ip.new(uci:get("network", "lan", "ipaddr")) or "192.168.1.1"
-        })
-    luci.sys.call("/sbin/poweroff")
-  end
+	local uci = require "luci.model.uci".cursor()
+	if http.formvalue("cancel") then
+		http.redirect(dispatcher.build_url('admin/system/advanced_reboot'))
+		return
+	end
+	local step = tonumber(http.formvalue("step") or 1)
+	if step == 1 then
+		if fs.access("/sbin/poweroff") then
+			ltemplate.render("advanced_reboot/power_off",{})
+		else
+			ltemplate.render("advanced_reboot/advanced_reboot",{})
+		end
+	elseif step == 2 then
+		ltemplate.render("admin_system/applyreboot", {
+					title = i18n.translate("Shutting down..."),
+					msg   = i18n.translate("The system is shutting down now.<br /> DO NOT POWER OFF THE DEVICE!<br /> It might be necessary to renew the address of your computer to reach the device again, depending on your settings."),
+					addr  = ip.new(uci:get("network", "lan", "ipaddr")) or "192.168.1.1"
+				})
+		sys.call("/sbin/poweroff")
+	end
 end