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