+
+
+ -- Install upload handler
+ local file
+ luci.http.setfilehandler(
+ function(meta, chunk, eof)
+ if not nixio.fs.access(tmpfile) and not file and chunk and #chunk > 0 then
+ file = io.open(tmpfile, "w")
+ end
+ if file and chunk then
+ file:write(chunk)
+ end
+ if file and eof then
+ file:close()
+ end
+ end
+ )
+
+
+ -- 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")
+ } )
+
+ -- Step 3: load iframe which calls the actual flash procedure
+ elseif step == 3 then
+ luci.template.render("admin_system/upgrade", {
+ step=3,
+ keepconfig=(keep_avail and luci.http.formvalue("keepcfg") == "1")
+ } )
+ end
+end
+
+function ltn12_popen(command)
+
+ local fdi, fdo = nixio.pipe()
+ local pid = nixio.fork()
+
+ if pid > 0 then
+ fdo:close()
+ local close
+ return function()
+ local buffer = fdi:read(2048)
+ local wpid, stat = nixio.waitpid(pid, "nohang")
+ if not close and wpid and stat == "exited" then
+ close = true
+ end
+
+ if buffer and #buffer > 0 then
+ return buffer
+ elseif close then
+ fdi:close()
+ return nil
+ end
+ end
+ elseif pid == 0 then
+ nixio.dup(fdo, nixio.stdout)
+ fdi:close()
+ fdo:close()
+ nixio.exec("/bin/sh", "-c", command)
+ end
+end