+ -- Determine state
+ local keep_avail = true
+ local step = tonumber(luci.http.formvalue("step") or 1)
+ local has_image = nixio.fs.access(tmpfile)
+ local has_support = image_supported()
+ local has_platform = nixio.fs.access("/lib/upgrade/platform.sh")
+ local has_upload = luci.http.formvalue("image")
+
+ -- This does the actual flashing which is invoked inside an iframe
+ -- so don't produce meaningful errors here because the the
+ -- previous pages should arrange the stuff as required.
+ if step == 4 then
+ if has_platform and has_image and has_support then
+ -- Mimetype text/plain
+ luci.http.prepare_content("text/plain")
+ luci.http.write("Starting sysupgrade...\n")
+
+ io.flush()
+
+ -- Now invoke sysupgrade
+ local keepcfg = keep_avail and luci.http.formvalue("keepcfg") == "1"
+ local flash = ltn12_popen("/sbin/sysupgrade %s %q" %{
+ keepcfg and "" or "-n", tmpfile
+ })
+
+ luci.ltn12.pump.all(flash, luci.http.write)
+ end
+
+
+ --
+ -- This is step 1-3, which does the user interaction and
+ -- image upload.
+ --
+
+ -- Step 1: file upload, error on unsupported image format
+ elseif not has_image or not has_support or step == 1 then
+ -- If there is an image but user has requested step 1
+ -- or type is not supported, then remove it.
+ if has_image then
+ nixio.fs.unlink(tmpfile)
+ end
+
+ luci.template.render("admin_system/upgrade", {
+ step=1,
+ bad_image=(has_image and not has_support or false),
+ keepavail=keep_avail,
+ supported=has_platform
+ } )
+
+ -- Step 2: present uploaded file, show checksum, confirmation
+ elseif step == 2 then
+ luci.template.render("admin_system/upgrade", {
+ step=2,
+ checksum=image_checksum(),
+ filesize=nixio.fs.stat(tmpfile).size,
+ flashsize=storage_size(),
+ keepconfig=(keep_avail and luci.http.formvalue("keepcfg") == "1")
+ } )