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

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