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+--[[
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+LuCI - Lua Configuration Interface
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+
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+Copyright 2008 Steven Barth <steven@midlink.org>
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+Copyright 2008 Jo-Philipp Wich <xm@leipzig.freifunk.net>
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+
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+Licensed under the Apache License, Version 2.0 (the "License");
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+you may not use this file except in compliance with the License.
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+You may obtain a copy of the License at
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+
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+ http://www.apache.org/licenses/LICENSE-2.0
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+
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+$Id$
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+]]--
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+
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+module("luci.controller.admin.system", package.seeall)
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+
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+function index()
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+ entry({"admin", "passwd"}, form("admin/passwd"), _("Admin Password"), 10)
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+ entry({"admin", "backup"}, call("action_backup"), _("Backup / Restore"), 80)
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+ entry({"admin", "upgrade"}, call("action_upgrade"), _("Flash Firmware"), 90)
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+ entry({"admin", "reboot"}, call("action_reboot"), _("Reboot"), 100)
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+end
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+
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+function action_backup()
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+ local reset_avail = os.execute([[grep '"rootfs_data"' /proc/mtd >/dev/null 2>&1]]) == 0
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+ local restore_cmd = "gunzip | tar -xC/ >/dev/null 2>&1"
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+ local backup_cmd = "tar -c %s | gzip 2>/dev/null"
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+
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+ local restore_fpi
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+ luci.http.setfilehandler(
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+ function(meta, chunk, eof)
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+ if not restore_fpi then
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+ restore_fpi = io.popen(restore_cmd, "w")
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+ end
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+ if chunk then
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+ restore_fpi:write(chunk)
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+ end
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+ if eof then
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+ restore_fpi:close()
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+ end
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+ end
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+ )
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+
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+ local upload = luci.http.formvalue("archive")
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+ local backup = luci.http.formvalue("backup")
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+ local reset = reset_avail and luci.http.formvalue("reset")
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+
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+ if upload and #upload > 0 then
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+ luci.template.render("admin/applyreboot")
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+ luci.sys.reboot()
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+ elseif backup then
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+ local reader = ltn12_popen(backup_cmd:format(_keep_pattern()))
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+ luci.http.header('Content-Disposition', 'attachment; filename="backup-%s-%s.tar.gz"' % {
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+ luci.sys.hostname(), os.date("%Y-%m-%d")})
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+ luci.http.prepare_content("application/x-targz")
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+ luci.ltn12.pump.all(reader, luci.http.write)
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+ elseif reset then
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+ luci.template.render("admin/applyreboot")
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+ luci.util.exec("mtd -r erase rootfs_data")
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+ else
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+ luci.template.render("admin/backup", {reset_avail = reset_avail})
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+ end
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+end
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+
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+function action_reboot()
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+ local reboot = luci.http.formvalue("reboot")
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+ luci.template.render("admin/reboot", {reboot=reboot})
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+ if reboot then
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+ luci.sys.reboot()
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+ end
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+end
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+
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+function action_upgrade()
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+ require("luci.model.uci")
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+
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+ local tmpfile = "/tmp/firmware.img"
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+
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+ local function image_supported()
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+ -- XXX: yay...
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+ return ( 0 == os.execute(
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+ ". /lib/functions.sh; " ..
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+ "include /lib/upgrade; " ..
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+ "platform_check_image %q >/dev/null"
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+ % tmpfile
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+ ) )
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+ end
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+
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+ local function image_checksum()
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+ return (luci.sys.exec("md5sum %q" % tmpfile):match("^([^%s]+)"))
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+ end
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+
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+ local function storage_size()
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+ local size = 0
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+ if nixio.fs.access("/proc/mtd") then
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+ for l in io.lines("/proc/mtd") do
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+ local d, s, e, n = l:match('^([^%s]+)%s+([^%s]+)%s+([^%s]+)%s+"([^%s]+)"')
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+ if n == "linux" then
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+ size = tonumber(s, 16)
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+ break
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+ end
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+ end
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+ elseif nixio.fs.access("/proc/partitions") then
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+ for l in io.lines("/proc/partitions") do
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+ local x, y, b, n = l:match('^%s*(%d+)%s+(%d+)%s+([^%s]+)%s+([^%s]+)')
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+ if b and n and not n:match('[0-9]') then
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+ size = tonumber(b) * 1024
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+ break
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+ end
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+ end
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+ end
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+ return size
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+ end
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+
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+
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+ -- Install upload handler
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+ local file
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+ luci.http.setfilehandler(
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+ function(meta, chunk, eof)
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+ if not nixio.fs.access(tmpfile) and not file and chunk and #chunk > 0 then
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+ file = io.open(tmpfile, "w")
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+ end
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+ if file and chunk then
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+ file:write(chunk)
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+ end
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+ if file and eof then
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+ file:close()
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+ end
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+ end
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+ )
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+
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+
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+ -- Determine state
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+ local keep_avail = true
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+ local step = tonumber(luci.http.formvalue("step") or 1)
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+ local has_image = nixio.fs.access(tmpfile)
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+ local has_support = image_supported()
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+ local has_platform = nixio.fs.access("/lib/upgrade/platform.sh")
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+ local has_upload = luci.http.formvalue("image")
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+
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+ -- This does the actual flashing which is invoked inside an iframe
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+ -- so don't produce meaningful errors here because the the
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+ -- previous pages should arrange the stuff as required.
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+ if step == 4 then
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+ if has_platform and has_image and has_support then
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+ -- Mimetype text/plain
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+ luci.http.prepare_content("text/plain")
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+ luci.http.write("Starting luci-flash...\n")
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+
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+ -- Now invoke sysupgrade
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+ local keepcfg = keep_avail and luci.http.formvalue("keepcfg") == "1"
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+ local flash = ltn12_popen("/sbin/luci-flash %s %q" %{
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+ keepcfg and "-k %q" % _keep_pattern() or "", tmpfile
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+ })
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+
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+ luci.ltn12.pump.all(flash, luci.http.write)
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+
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+ -- Make sure the device is rebooted
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+ luci.sys.reboot()
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+ end
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+
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+
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+ --
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+ -- This is step 1-3, which does the user interaction and
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+ -- image upload.
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+ --
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+
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+ -- Step 1: file upload, error on unsupported image format
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+ elseif not has_image or not has_support or step == 1 then
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+ -- If there is an image but user has requested step 1
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+ -- or type is not supported, then remove it.
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+ if has_image then
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+ nixio.fs.unlink(tmpfile)
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+ end
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+
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+ luci.template.render("admin/upgrade", {
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+ step=1,
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+ bad_image=(has_image and not has_support or false),
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+ keepavail=keep_avail,
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+ supported=has_platform
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+ } )
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+
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+ -- Step 2: present uploaded file, show checksum, confirmation
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+ elseif step == 2 then
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+ luci.template.render("admin/upgrade", {
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+ step=2,
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+ checksum=image_checksum(),
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+ filesize=nixio.fs.stat(tmpfile).size,
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+ flashsize=storage_size(),
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+ keepconfig=(keep_avail and luci.http.formvalue("keepcfg") == "1")
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+ } )
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+
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+ -- Step 3: load iframe which calls the actual flash procedure
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+ elseif step == 3 then
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+ luci.template.render("admin/upgrade", {
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+ step=3,
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+ keepconfig=(keep_avail and luci.http.formvalue("keepcfg") == "1")
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+ } )
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+ end
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+end
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+
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+function _keep_pattern()
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+ local kpattern = ""
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+ local files = luci.model.uci.cursor():get_all("luci", "flash_keep")
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+ if files then
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+ kpattern = ""
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+ for k, v in pairs(files) do
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+ if k:sub(1,1) ~= "." and nixio.fs.glob(v)() then
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+ kpattern = kpattern .. " " .. v
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+ end
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+ end
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+ end
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+ return kpattern
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+end
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+
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+function ltn12_popen(command)
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+
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+ local fdi, fdo = nixio.pipe()
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+ local pid = nixio.fork()
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+
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+ if pid > 0 then
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+ fdo:close()
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+ local close
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+ return function()
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+ local buffer = fdi:read(2048)
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+ local wpid, stat = nixio.waitpid(pid, "nohang")
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+ if not close and wpid and stat == "exited" then
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+ close = true
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+ end
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+
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+ if buffer and #buffer > 0 then
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+ return buffer
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+ elseif close then
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+ fdi:close()
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+ return nil
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+ end
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+ end
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+ elseif pid == 0 then
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+ nixio.dup(fdo, nixio.stdout)
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+ fdi:close()
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+ fdo:close()
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+ nixio.exec("/bin/sh", "-c", command)
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+ end
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+end
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Nils Schneider