modules/admin-mini/luasrc/controller/mini/system.lua

   1 --[[
   2 LuCI - Lua Configuration Interface
   3
   4 Copyright 2008 Steven Barth <steven@midlink.org>
   5 Copyright 2008 Jo-Philipp Wich <xm@leipzig.freifunk.net>
   6
   7 Licensed under the Apache License, Version 2.0 (the "License");
   8 you may not use this file except in compliance with the License.
   9 You may obtain a copy of the License at
  10
  11         http://www.apache.org/licenses/LICENSE-2.0
  12
  13 $Id$
  14 ]]--
  15
  16 module("luci.controller.mini.system", package.seeall)
  17
  18 function index()
  19         luci.i18n.loadc("base")
  20         local i18n = luci.i18n.translate
  21
  22         entry({"mini", "system"}, alias("mini", "system", "index"), i18n("System"), 40).index = true
  23         entry({"mini", "system", "index"}, cbi("mini/system", {autoapply=true}), i18n("General"), 1)
  24         entry({"mini", "system", "passwd"}, form("mini/passwd"), i18n("Admin Password"), 10)
  25         entry({"mini", "system", "backup"}, call("action_backup"), i18n("Backup / Restore"), 80)
  26         entry({"mini", "system", "upgrade"}, call("action_upgrade"), i18n("Flash Firmware"), 90)
  27         entry({"mini", "system", "reboot"}, call("action_reboot"), i18n("Reboot"), 100)
  28 end
  29
  30 function action_backup()
  31         local reset_avail = os.execute([[grep '"rootfs_data"' /proc/mtd >/dev/null 2>&1]]) == 0
  32         local restore_cmd = "gunzip | tar -xC/ >/dev/null 2>&1"
  33         local backup_cmd  = "tar -c %s | gzip 2>/dev/null"
  34
  35         local restore_fpi
  36         luci.http.setfilehandler(
  37                 function(meta, chunk, eof)
  38                         if not restore_fpi then
  39                                 restore_fpi = io.popen(restore_cmd, "w")
  40                         end
  41                         if chunk then
  42                                 restore_fpi:write(chunk)
  43                         end
  44                         if eof then
  45                                 restore_fpi:close()
  46                         end
  47                 end
  48         )
  49
  50         local upload = luci.http.formvalue("archive")
  51         local backup = luci.http.formvalue("backup")
  52         local reset  = reset_avail and luci.http.formvalue("reset")
  53
  54         if upload and #upload > 0 then
  55                 luci.template.render("mini/applyreboot")
  56                 luci.sys.reboot()
  57         elseif backup then
  58                 local reader = ltn12_popen(backup_cmd:format(_keep_pattern()))
  59                 luci.http.header('Content-Disposition', 'attachment; filename="backup-%s-%s.tar.gz"' % {
  60                         luci.sys.hostname(), os.date("%Y-%m-%d")})
  61                 luci.http.prepare_content("application/x-targz")
  62                 luci.ltn12.pump.all(reader, luci.http.write)
  63         elseif reset then
  64                 luci.template.render("mini/applyreboot")
  65                 luci.util.exec("mtd -r erase rootfs_data")
  66         else
  67                 luci.template.render("mini/backup", {reset_avail = reset_avail})
  68         end
  69 end
  70
  71 function action_reboot()
  72         local reboot = luci.http.formvalue("reboot")
  73         luci.template.render("mini/reboot", {reboot=reboot})
  74         if reboot then
  75                 luci.sys.reboot()
  76         end
  77 end
  78
  79 function action_upgrade()
  80         require("luci.model.uci")
  81
  82         local tmpfile = "/tmp/firmware.img"
  83
  84         local function image_supported()
  85                 -- XXX: yay...
  86                 return ( 0 == os.execute(
  87                         ". /etc/functions.sh; " ..
  88                         "include /lib/upgrade; " ..
  89                         "platform_check_image %q >/dev/null"
  90                                 % tmpfile
  91                 ) )
  92         end
  93
  94         local function image_checksum()
  95                 return (luci.sys.exec("md5sum %q" % tmpfile):match("^([^%s]+)"))
  96         end
  97
  98         local function storage_size()
  99                 local size = 0
 100                 if nixio.fs.access("/proc/mtd") then
 101                         for l in io.lines("/proc/mtd") do
 102                                 local d, s, e, n = l:match('^([^%s]+)%s+([^%s]+)%s+([^%s]+)%s+"([^%s]+)"')
 103                                 if n == "linux" then
 104                                         size = tonumber(s, 16)
 105                                         break
 106                                 end
 107                         end
 108                 elseif nixio.fs.access("/proc/partitions") then
 109                         for l in io.lines("/proc/partitions") do
 110                                 local x, y, b, n = l:match('^%s*(%d+)%s+(%d+)%s+([^%s]+)%s+([^%s]+)')
 111                                 if b and n and not n:match('[0-9]') then
 112                                         size = tonumber(b) * 1024
 113                                         break
 114                                 end
 115                         end
 116                 end
 117                 return size
 118         end
 119
 120
 121         -- Install upload handler
 122         local file
 123         luci.http.setfilehandler(
 124                 function(meta, chunk, eof)
 125                         if not nixio.fs.access(tmpfile) and not file and chunk and #chunk > 0 then
 126                                 file = io.open(tmpfile, "w")
 127                         end
 128                         if file and chunk then
 129                                 file:write(chunk)
 130                         end
 131                         if file and eof then
 132                                 file:close()
 133                         end
 134                 end
 135         )
 136
 137
 138         -- Determine state
 139         local keep_avail   = true
 140         local step         = tonumber(luci.http.formvalue("step") or 1)
 141         local has_image    = nixio.fs.access(tmpfile)
 142         local has_support  = image_supported()
 143         local has_platform = nixio.fs.access("/lib/upgrade/platform.sh")
 144         local has_upload   = luci.http.formvalue("image")
 145
 146         -- This does the actual flashing which is invoked inside an iframe
 147         -- so don't produce meaningful errors here because the the
 148         -- previous pages should arrange the stuff as required.
 149         if step == 4 then
 150                 if has_platform and has_image and has_support then
 151                         -- Mimetype text/plain
 152                         luci.http.prepare_content("text/plain")
 153                         luci.http.write("Starting luci-flash...\n")
 154
 155                         -- Now invoke sysupgrade
 156                         local keepcfg = keep_avail and luci.http.formvalue("keepcfg") == "1"
 157                         local flash = ltn12_popen("/sbin/luci-flash %s %q" %{
 158                                 keepcfg and "-k %q" % _keep_pattern() or "", tmpfile
 159                         })
 160
 161                         luci.ltn12.pump.all(flash, luci.http.write)
 162
 163                         -- Make sure the device is rebooted
 164                         luci.sys.reboot()
 165                 end
 166
 167
 168         --
 169         -- This is step 1-3, which does the user interaction and
 170         -- image upload.
 171         --
 172
 173         -- Step 1: file upload, error on unsupported image format
 174         elseif not has_image or not has_support or step == 1 then
 175                 -- If there is an image but user has requested step 1
 176                 -- or type is not supported, then remove it.
 177                 if has_image then
 178                         nixio.fs.unlink(tmpfile)
 179                 end
 180
 181                 luci.template.render("mini/upgrade", {
 182                         step=1,
 183                         bad_image=(has_image and not has_support or false),
 184                         keepavail=keep_avail,
 185                         supported=has_platform
 186                 } )
 187
 188         -- Step 2: present uploaded file, show checksum, confirmation
 189         elseif step == 2 then
 190                 luci.template.render("mini/upgrade", {
 191                         step=2,
 192                         checksum=image_checksum(),
 193                         filesize=nixio.fs.stat(tmpfile).size,
 194                         flashsize=storage_size(),
 195                         keepconfig=(keep_avail and luci.http.formvalue("keepcfg") == "1")
 196                 } )
 197
 198         -- Step 3: load iframe which calls the actual flash procedure
 199         elseif step == 3 then
 200                 luci.template.render("mini/upgrade", {
 201                         step=3,
 202                         keepconfig=(keep_avail and luci.http.formvalue("keepcfg") == "1")
 203                 } )
 204         end
 205 end
 206
 207 function _keep_pattern()
 208         local kpattern = ""
 209         local files = luci.model.uci.cursor():get_all("luci", "flash_keep")
 210         if files then
 211                 kpattern = ""
 212                 for k, v in pairs(files) do
 213                         if k:sub(1,1) ~= "." and nixio.fs.glob(v)() then
 214                                 kpattern = kpattern .. " " ..  v
 215                         end
 216                 end
 217         end
 218         return kpattern
 219 end
 220
 221 function ltn12_popen(command)
 222
 223         local fdi, fdo = nixio.pipe()
 224         local pid = nixio.fork()
 225
 226         if pid > 0 then
 227                 fdo:close()
 228                 local close
 229                 return function()
 230                         local buffer = fdi:read(2048)
 231                         local wpid, stat = nixio.waitpid(pid, "nohang")
 232                         if not close and wpid and stat == "exited" then
 233                                 close = true
 234                         end
 235
 236                         if buffer and #buffer > 0 then
 237                                 return buffer
 238                         elseif close then
 239                                 fdi:close()
 240                                 return nil
 241                         end
 242                 end
 243         elseif pid == 0 then
 244                 nixio.dup(fdo, nixio.stdout)
 245                 fdi:close()
 246                 fdo:close()
 247                 nixio.exec("/bin/sh", "-c", command)
 248         end
 249 end