path: root/lib/isodumper.py

#coding:utf-8

#!/usr/bin/python
#
#  Copyright (c) 2007-2009 Canonical Ltd.
#
#  Author: Oliver Grawert <ogra@ubuntu.com>
#
#  Modifications 2013 from papoteur <papoteur@mageialinux-online.org>
#  and Geiger David <david.david@mageialinux-online.org>
#
#  This program is free software; you can redistribute it and/or
#  modify it under the terms of the GNU General Public License as
#  published by the Free Software Foundation; either version 2 of the
#  License, or (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program; if not, write to the Free Software Foundation,
#  Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.

#  Requires python-parted

# ensure we're using the latest build, if called from our build environment
import sys
import imp

sys.path.insert(0,'../../../build/swig/python')
imp.reload(sys)
sys.setdefaultencoding("utf-8")
###########
# imports #
###########
import yui
#import locale
import time

####################################
# LOCALE (important for TERMINAL!) #
####################################
# set the locale to de/utf-8
#locale.setlocale(locale.LC_ALL, "")
#log = yui.YUILog.instance()
#log.setLogFileName("debug.log")
#log.enableDebugLogging( True )

import os, re
import io
import gettext
from gettext import gettext as _
from subprocess import call, Popen, PIPE
import dbus


class NoUDisks2(Exception):
    pass


class UDisks2(object):

    BLOCK = 'org.freedesktop.UDisks2.Block'
    FILESYSTEM = 'org.freedesktop.UDisks2.Filesystem'
    DRIVE = 'org.freedesktop.UDisks2.Drive'

    def __init__(self):
        self.bus = dbus.SystemBus()
        try:
            self.bus.get_object('org.freedesktop.UDisks2',
                        '/org/freedesktop/UDisks2')
        except dbus.exceptions.DBusException as e:
            if getattr(e, '_dbus_error_name', None) == 'org.freedesktop.DBus.Error.ServiceUnknown':
                raise NoUDisks2()
            raise

    def node_mountpoint(self,node):

        def de_mangle(raw):
            return raw.replace('\\040', ' ').replace('\\011', '\t').replace('\\012',
                    '\n').replace('\\0134', '\\')

        for line in open('/proc/mounts').readlines():
            line = line.split()
            if line[0] == node:
                return de_mangle(line[1])
        return None

    def device(self, device_node_path):
        device_node_path = os.path.realpath(device_node_path)
        devname = device_node_path.split('/')[-1]

        # First we try a direct object path
        bd = self.bus.get_object('org.freedesktop.UDisks2',
                        '/org/freedesktop/UDisks2/block_devices/%s'%devname)
        try:
            device = bd.Get(self.BLOCK, 'Device',
                dbus_interface='org.freedesktop.DBus.Properties')
            device = bytearray(device).replace(b'\x00', b'').decode('utf-8')
        except:
            device = None

        if device == device_node_path:
            return bd

        # Enumerate all devices known to UDisks2
        devs = self.bus.get_object('org.freedesktop.UDisks2',
                        '/org/freedesktop/UDisks2/block_devices')
        xml = devs.Introspect(dbus_interface='org.freedesktop.DBus.Introspectable')
        for dev in re.finditer(r'name=[\'"](.+?)[\'"]', type('')(xml)):
            bd = self.bus.get_object('org.freedesktop.UDisks2',
                '/org/freedesktop/UDisks2/block_devices/%s2'%dev.group(1))
            try:
                device = bd.Get(self.BLOCK, 'Device',
                    dbus_interface='org.freedesktop.DBus.Properties')
                device = bytearray(device).replace(b'\x00', b'').decode('utf-8')
            except:
                device = None
            if device == device_node_path:
                return bd

        raise ValueError(_('%r not known to UDisks2')%device_node_path)

    def find_devices(self):
        proxy = self.bus.get_object("org.freedesktop.UDisks2", "/org/freedesktop/UDisks2")
        iface = dbus.Interface(proxy, "org.freedesktop.UDisks2")
        _udisks2_obj_manager = dbus.Interface(iface, "org.freedesktop.DBus.ObjectManager")
        objects=_udisks2_obj_manager.GetManagedObjects()
        re_drive = re.compile('(?P<path>.*?/drives/(?P<id>.*))')
        re_block = re.compile('(?P<path>.*?/block_devices/(?P<id>.*))')
        devs= [m.groupdict() for m in
                     [re_drive.match(path) for path in list(objects.keys())]
                 if m]
        blocks = [m.groupdict() for m in
                     [re_block.match(path) for path in list(objects.keys())]
                 if m]
        list=[]

        for dev in devs:
            dev_obj =objects[dev['path']]['org.freedesktop.UDisks2.Drive']
            if (dev_obj['ConnectionBus'] == 'usb' or dev_obj['ConnectionBus'] == 'sdio') and \
                 (dev_obj['Removable'] == 1 or dev_obj['MediaRemovable'] == 1 ):
               item=[]
               vend = dev_obj['Vendor']
               name = dev_obj['Model']
               for block in blocks:
                   if dev['path'] == objects[block['path']]['org.freedesktop.UDisks2.Block']['Drive']:
                       path = '/dev/'+block['path'].split('/')[-1]
               size = dev_obj['Size']
               item.append(vend+" "+name)
               item.append(path)
               item.append(size)
               list.append(item)
        return list

    def unmount(self, device_node_path):
        d = self.device(device_node_path)
        d.Unmount({'force':True, 'auth.no_user_interaction':True},
                dbus_interface=self.FILESYSTEM)

    def drive_for_device(self, device):
        drive = device.Get(self.BLOCK, 'Drive',
            dbus_interface='org.freedesktop.DBus.Properties')
        return self.bus.get_object('org.freedesktop.UDisks2', drive)

    def eject(self, device_node_path):
        drive = self.drive_for_device(self.device(device_node_path))
        drive.Eject({'auth.no_user_interaction':True},
                dbus_interface=self.DRIVE)

class Info(object):
    def __init__(self,title,richtext,text):
        self.title=title
        self.richtext=richtext
        self.text=text

       
class IsoDumper(object):

    def get_devices(self):
        self.list=self.u.find_devices()
        while len(self.list)==0:
            if self.nodevDialog():
                self.list = self.u.find_devices()
            else:
                return False
                break
        if len(self.list)>0:
            for name, path, size in self.list:
                # convert in Mbytes
                sizeM=str(int(size)/(1024*1024))
                self.devicelist.addItem(str(name+' ('+path.lstrip()+') '+sizeM+_('Mb')),False)
            return True


    def update_list(self ):
        self.devicelist.deleteAllItems()
        self.get_devices()
        self.restore()

    def device_selected(self):
        selitem = self.devicelist.selectedItem()
        if selitem != None:
            self.dev = selitem.label()
            for name, path, size in self.list:
                if self.dev.startswith(name):
                    self.deviceSize=size
                    self.device_name=name.rstrip().replace(' ', '')
                    break
            self.formatbt.setEnabled()
            self.ima.setEnabled()
#                if self.chooser.get_current_folder_uri() == None :
#                self.chooser.set_current_folder_uri('file:///home/'+self.user)
            self.logger(_('Target Device: ')+ self.dev)

    def backup_sel(self,widget):
        if self.backup_bname.get_current_folder_uri() == None :
            self.backup_bname.set_current_folder_uri('file:///home/'+self.user)
        self.backup_bname.set_current_name(self.device_name+".img")
        self.choose.run()

    def backup_choosed(self):
            # Add .img if not specified
            if not self.backup_img_name.lower().endswith('.img'):
                self.backup_img_name=self.backup_img_name+".img"
            head, tail = os.path.split(self.backup_img_name)
            self.backup_dest=self.backup_img_name
            self.backup_select.setLabel(tail)
            self.backupbt.setEnabled()
            #self.backup_select.set_tooltip_text(self.backup_img_name)
            self.logger(_('Backup to: ')+ self.backup_img_name)

    def do_format(self,format_type,name)            :
        target = self.dev.split('(')[1].split(')')[0]
        info = Info(_("Formatting confirmation"),1,self.warning)
        if self.ask_YesOrNo(info):
            rc=self.raw_format(target, format_type, name)
            self.operation=False
            if rc == 0:
                message = _('The device was formatted successfully.')
                self.logger(message)
                self.success()
            elif rc == 5:
                message = _("An error occurred while creating a partition.")
                self.logger(message)
                self.emergency(message)
            elif rc == 127:
                message = _('Authentication error.')
                self.logger(message)
                self.emergency(message)
            else:
                message = _('An error occurred.')
                self.emergency(message)

    def restore(self):
        self.backup_select.setEnabled()
        self.backupbt.setDisabled()
        self.formatbt.setEnabled()
        self.ima.setEnabled()
        self.devicelist.setEnabled()
        self.progress.setLabel("")
        self.progress.setValue(0)
        self.progress.setDisabled()

    def raw_format(self, usb_path, fstype, label):
        self.operation=True
        if os.geteuid() > 0:
            launcher='pkexec'
            self.process = Popen([launcher,'/usr/bin/python', '-u', '/usr/lib/isodumper/raw_format.py','-d',usb_path,'-f',fstype, '-l', label, '-u', str(os.geteuid()), '-g', str(os.getgid())], shell=False, stdout=PIPE, preexec_fn=os.setsid)
        else:
            self.process = Popen(['/usr/bin/python', '-u', '/usr/lib/isodumper/raw_format.py','-d',usb_path,'-f',fstype, '-l', label, '-u', str(os.geteuid()), '-g', str(os.getgid())], shell=False, stdout=PIPE, preexec_fn=os.setsid)
        working=True
        while working:
            time.sleep(0.5)
            self.process.poll()
            rc=self.process.returncode
            if rc is None:
                working=True
            else:
                self.process = None
                working= False
        return rc

    def backup_go(self):
        dest = self.backup_img_name
        if os.path.exists(dest):
            info = Info(_("Backup confirmation"),1,_("Do you want to overwrite the file?"))
            if not(self.ask_YesOrNo(info)):
                self.returncode = 1
                return True
        st = os.statvfs(os.path.dirname(dest))
        free = st.f_bavail * st.f_frsize
        if free<self.deviceSize :
            sizeM=str(self.deviceSize/(1024*1024))
            message=_("The destination directory is too small to receive the backup (%s Mb needed)")%(sizeM)
            self.logger(message)
            self.emergency(message)
        else:
            self.returncode=0
            source = self.dev.split('(')[1].split(')')[0]
            self.logger(_('Backup in:')+' '+dest)
            self.raw_write(source, dest, self.deviceSize)
            if self.returncode==0:
            	self.success()
            self.restore()
                

    def do_write(self):
#        write_button = self.wTree.get_widget("write_button")
        self.writebt.setDisabled()
        self.devicelist.setDisabled()
        self.formatbt.setDisabled()
        self.backupbt.setDisabled()
        self.backup_select.setDisabled()
        self.progress.setEnabled()
        source = self.img_name
        target = self.dev.split('(')[1].split(')')[0]
        self.logger(_('Image: ')+source)
        self.logger(_('Target Device: ')+self.dev)
        b = os.path.getsize(source)
        if b > (self.deviceSize):
            message = _('The device is too small to contain the ISO file.')
            self.logger(message)
            self.emergency(message)
        else:
            info = Info(_("Writing confirmation"),1,self.warning)
            if self.ask_YesOrNo(info):
                if self.deviceSize> 1024*1024*1024*32 :
                    info = Info(_("Warning"),2,_('The device is bigger than 32 Gbytes.\
                    Are you sure you want use it?'))
                    if self.ask_YesOrNo(info):
                        pass
                    else:
                        self.emergency(message)
                        return
                self.ima.setDisabled()
                self.writebt.setDisabled()
                self.do_umount(target)
                # Writing step
                #Dump mode
                self.returncode=0
                b=os.path.getsize(source)
                self.raw_write(source, target, b)
                self.check_write(target, b)
                if self.returncode == 0:
                    self.success()
            else:
                self.restore()
    def do_umount(self, target):
        mounts = self.get_mounted(target)
        if mounts:
            self.logger(_('Unmounting all partitions of ')+target+':')
        for mount in mounts:
            self.logger(_('Trying to unmount ')+mount[0]+'...')
            try:
                retcode = call('umount '+mount[0], shell=True)
                if retcode < 0:
                    message = _('Error, umount ')+mount[0]+_(' was terminated by signal ')+str(retcode)
                    self.logger(message)
                    self.emergency(message)
                else:
                    if retcode == 0:
                        self.logger(mount[0]+_(' successfully unmounted'))
                    else:
                        message = _('Error, umount ')+mount[0]+_(' returned ')+str(retcode)
                        self.logger(message)
                        self.emergency(message)
            except OSError as e:
                message = _('Execution failed: ')+str(e)
                self.logger(message)
                self.emergency(message)

    def get_mounted(self, target):
        try:
            lines = [line.strip("\n").split(" ") for line in open ("/etc/mtab", "r").readlines()]
            return [mount for mount in lines if mount[0].startswith(target)]
        except:
             message = _('Could not read mtab !')
             self.logger(message)
             self.emergency(message)

    def raw_write(self, source, target, b):
        self.operation=True
        bs=4096*128
        try:
            ifc=io.open(source, "rb",1)
        except:
             message = _('Reading error.')+ source
             self.logger(message)
             self.emergency(message)
             return
        else:
            try:
                ofc= io.open(target, 'wb',0)
            except:
                 message = _('You have not the rights for writing on the device')
                 self.logger(message)
                 self.emergency(message)
                 self.close()
            else:
                self.progress.setEnabled()
                self.progress.setLabel(_('Writing ')+source.split('/')[-1]+_(' to ')+target.split('/')[-1])
                self.logger(_('Executing copy from ')+source+_(' to ')+target)
                steps=list(range(0, b+1, b/100))
                steps.append(b)
                indice=1
                written=0
                ncuts=b/bs
                while ncuts <= 100:
                    bs=bs/2
                    ncuts=b/bs
                for i in range(0,ncuts+1):
                    try:
                        buf=ifc.read(bs)
                    except:
                        message = _("Reading error.")
                        self.logger(message)
                        self.emergency(message)
                        return
                    try:
                        ofc.write(buf)
                    except:
                        message = _("Writing error.")
                        self.logger(message)
                        self.emergency(message)
                        return
                    written+=len(buf)
                    if written > steps[indice]:
                        if indice%1==0:
                            self.logger(_('Wrote: ')+str(indice)+'% '+str(written)+' bytes')
                        self.progress.setValue(indice)
                        self.dialog.pollEvent()
                        indice +=1
                        try:
                            os.fsync(ofc)
                        except:
                           message = _("Writing error.")
                           self.logger(message)
                           self.emergency(message)
                           return
                self.progress.setValue(100)
                self.logger(_('Image ')+source.split('/')[-1]+_(' successfully written to ')+target)
                self.logger(_('Bytes written: ')+str(written))
                try:
                    ofc.close()
                except:
                   message = _("Writing error.")
                   self.logger(message)
                   self.emergency(message)
            ifc.close()

    def check_write(self, target, b):
        import hashlib
        self.progress.setEnabled()
        self.progress.setLabel(_('Checking ')+target.split('/')[-1])
        self.progress.setValue(0)
        steps=list(range(0, b+1, b/100))
        steps.append(b)
        indice=0
        checked=0
        sha1func=hashlib.sha1()
        md5func=hashlib.md5()
        ncuts=b/1024
        try:
    		with open(target, 'rb') as f:
    			for x in range(0,ncuts):
    				block = f.read(1024)
    				sha1func.update(block)
    				md5func.update(block)
    				if checked > steps[indice]:
    					self.progress.setValue(indice)
    					self.dialog.pollEvent()
    					indice +=1
    				checked+=1024                         
    			block = f.read(b-ncuts*1024)
    			sha1func.update(block)
    			md5func.update(block)
    			sha1sumcalc=sha1func.hexdigest()
    			md5sumcalc=md5func.hexdigest()
    		self.logger(_('SHA1 sum: ')+sha1sumcalc)
    		self.logger(_('MD5  sum: ')+md5sumcalc)
    		f.close()
    	except:
    		pass
        self.progress.setValue(100)

    def success(self):
        self.operation=False
        self.final_unsensitive()
        info = Info(_("Success"),1,_("The operation was successfully performed.\n\
 You are free to unplug it now, a log isodumper.log\n\
 of the operation will be saved in your homedir/.isodumper/ when\n\
 you close the application."))
        if self.ask_OK(info) :
           return


    def confirm_close(self, *args):
        if self.operation==False:    # no writing , backup nor format running
            self.close()
        else:   # writing , backup or format running
            info = Info(_("Warning"),1,_("Writing is in progress. Exiting during writing \n\
            will occur that the device or the backup will be unusable.\n\
            Are you sure you want to quit during writing?"))
            if self.ask_YesOrNo(info) :
                return True
            else:
                return False

    def emergency(self,message):
        self.operation=False
        self.returncode=1
        self.final_unsensitive()
        info = Info(_("Error"),1,message)
        self.ask_OK(info)

    def final_unsensitive(self):
        self.ima.setDisabled()
        self.devicelist.setDisabled()
        self.writebt.setDisabled()
        self.progress.setDisabled()
        self.backup_select.setDisabled()

    def close(self):
        self.write_logfile()
        self.dialog.destroy
        #exit(0)

    def write_logfile(self):
        import pwd
        pw = pwd.getpwnam(self.user)
        uid = pw.pw_uid
        gid=pw.pw_gid
        if (self.user != 'root') and (self.user !=''):
            logpath='/home/'+self.user+'/.isodumper'
            os.setgid(gid)
            os.setuid(uid)
            if not(os.path.isdir(logpath)):
                os.mkdir(logpath)
        else:
            logpath='/root'
        logfile=open(logpath+'/isodumper.log',"w")
        logfile.write(self.logview.logText())
        logfile.close()

        print(self.logview.logText())

    def logger(self, text):
        self.logview.appendLines(text+"\n")

    def activate_devicelist(self):
        self.devicelist.setEnabled()
#        self.img_name = self.chooser.get_filename()
        self.writebt.setEnabled()
        self.logger(_('Image ')+": "+ self.img_name)
#        self.chooser.set_tooltip_text(self.img_name)

    def help_dialog(self):
        info = Info(_("IsoDumper"),0,_("Mageia IsoDumper\n\
----------------\n\
This GUI program is primarily for safely writing a bootable ISO image to a USB flash drive, \nan operation devious & potentially hazardous when done by hand. As a bonus, it can also back up the entire previous\ncontents of the flash drive onto the hard disc, and restore the flash drive to its previous state subsequently.\n It gives also a feature for formatting the USB device.\n\
\n\
IsoDumper can be launched either from the menus, or a user or root console with the command 'isodumper'.\nFor normal users, the root password is solicited; this is necessary for the program's operation. \nThe flash drive can be inserted beforehand or once the program is started. In the latter case, a dialogue will say \nthat there is no flash drive inserted, and allow a 'retry' to find it once it is. \n(You may have to close any automatically opened File Manager window).\n\
\n\
The fields of the main window are as follows:\n\
- Device to work on: the device of the USB flash drive, a drop-down list to choose from.\n\
- Write Image: to choose the source ISO image *.iso (or flash drive backup file *.img) to write out.\n\
- Write to device: This button launches the operation - with a prior warning dialogue. \nThe operation is shown in the progress bar beneath.\n\
- Backup in: define the name and placement of the backup image file. The current flash \ndrive will be backed up to a disc file. Note that the entire flash drive is preserved, regardless of its actual contents;\n ensure that you have the necessary free disc space (the same size as the USB device). \nThis backup file can be used later to restore the flash drive by selecting it as the source *.img file to write out.\n\
- Backup the device: launch the backup operation.\n\
- Format the device:  create an unique partition on the entire volume in the specified format in FAT, \nNTFS or ext. You can specify a volume name and the format in a new dialog box.\n"))
        if self.ask_OK(info) :
           return

    def __init__(self,user):
        APP="isodumper"
        DIR="/usr/share/locale"
        self.RELEASE="v0.40"

        gettext.bindtextdomain(APP, DIR)
        gettext.textdomain(APP)

        # for the localisation of log file
        self.user = user

        # define size of the selected device
        self.deviceSize=0

        # Operation running
        self.operation=False
        
        self.warning = _("Warning\nThis will destroy all data on the target device,\n\
        are you sure you want to proceed?\n\
        If you say ok here, please <b>do not unplug</b>\
        the device during the following operation.")
        """
        Init/Constructor for the 'widgets'
        """
        yui.YUI.app().setApplicationTitle("ManaDumper")
        yui.YUI.app().setApplicationIcon("/usr/share/icons/isodumper.png")
        self.atelier = yui.YUI.widgetFactory()
        self.dialog = self.atelier.createMainDialog()
        #self.dialog.setTitle("ManaDumper")
        # create the main gui
        # +---+-----------------+
        # +   banner            +
        # +---+-----------------+
        # |  devicelist         |
        # +---+-----+------+----+
        # + L | ima | writebt |
        # +---+-----+------+----+
        # + L | backup_select | backupbt |
        # +---+-----+------+----+
        # + F       | formatbt  |
        # +----------------+----+
        # | progress            |
        # +---------------------+
        # | report              |
        # +---------------------+
        # | refreshbt | aboutbt  | helpbt | quitbt  |
        # +---------------------+
        self.ancrage = self.atelier.createReplacePoint(self.dialog)
        self.box = self.atelier.createVBox(self.ancrage)
        self.bannerbox = self.atelier.createHBox(self.box)
#        self.bannerbox.setWeight(1,15)
        self.banner=self.atelier.createImage(self.bannerbox,"/usr/share/isodumper/header.png")
        self.devicebox = self.atelier.createHBox(self.box)
        self.devicebox.setWeight(1,10)
        self.devicelist=self.atelier.createComboBox(self.devicebox,_("Device to use:"),False)
        self.devicelist.setStretchable(0,True)
        self.writebox = self.atelier.createHBox(self.box)
        #self.writebox.setWeight(1,10)
        self.atelier.createLabel(self.writebox,_("Write Image:"))
        #   add file picker
        self.ima=self.atelier.createPushButton(self.writebox,"Choose an image")
        self.ima.setStretchable(0,True)
        self.atelier.createHStretch(self.writebox)
        self.writebt = self.atelier.createPushButton(self.writebox, _("&Write" ))
        #self.writebt.setStretchable(0,True)
        self.writebt.setDisabled()
        self.backupbox = self.atelier.createHBox(self.box)
        #self.backupbox.setWeight(1,10)
        self.atelier.createLabel(self.backupbox,_("Backup to:"))
        self.backup_select=self.atelier.createPushButton(self.backupbox,_("Choose an image"))
        self.backup_select.setStretchable(0,True)
        self.atelier.createHStretch(self.backupbox)
        self.backupbt = self.atelier.createPushButton(self.backupbox, _("&Backup" ))
        #self.backupbt.setStretchable(0,True)
        self.backupbt.setDisabled()
        self.formatbox = self.atelier.createHBox(self.box)
        #self.formatbox.setWeight(1,10)
        self.atelier.createLabel(self.formatbox,_("Format the device in FAT, NTFS or ext:"))
        self.atelier.createHStretch(self.formatbox)
        self.formatbt = self.atelier.createPushButton(self.formatbox, _("&Format" ))
        #self.formatbt.setStretchable(0,True)
        self.progressbox = self.atelier.createHBox(self.box)
        self.progressbox.setWeight(1,10)
        self.progress = self.atelier.createProgressBar(self.progressbox,"Progression",100)
        self.reportbox = self.atelier.createHBox(self.box)
        #self.reportbox.setWeight(1,10)
        self.logview = self.atelier.createLogView(self.reportbox,"Report", 10)
        #self.reportbox.setWeight(1,20)
        self.buttonsbox = self.atelier.createHBox(self.box)
        #self.buttonsbox.setWeight(1,10)
#        self.cadregauche= self.atelier.createFrame(self.mainhbox,"Traitements par lots")
        self.refreshbt = self.atelier.createPushButton(self.buttonsbox, _("&Refresh" ))
        self.refreshbt.setStretchable(0,True)
        self.aboutbt = self.atelier.createPushButton(self.buttonsbox, _("&About" ))
        self.aboutbt.setStretchable(0,True)
        self.helpbt = self.atelier.createPushButton(self.buttonsbox, _("&Help" ))
        self.helpbt.setStretchable(0,True)
        self.quitbt = self.atelier.createPushButton(self.buttonsbox, _("&Quit" ))
        self.quitbt.setStretchable(0,True)
        
        self.u = None
        try:
            self.u = UDisks2()
        except :
           message = _('UDisks2 is not available on your system')
           self.logger(message)
           self.emergency(message)
        if not self.get_devices():
            self.dialog.destroy()
        self.device_selected()
        self.dialog.recalcLayout()
        self.ancrage.showChild()

    def ask_format(self):
        self.ima.setDisabled()
        self.formatbt.setDisabled()
        self.backup_select.setDisabled()
        self.writebt.setDisabled()
        self.devicelist.setDisabled()
        atelier =  yui.YUI.widgetFactory()       
        dialog = atelier.createPopupDialog()
#        dialog.setTitle(_("Choose format"))
        vb=atelier.createVBox(dialog)
        label = atelier.createInputField(vb,_("Label for the device:"))
        cr = atelier.createRadioButtonGroup(vb)
        vb_c = atelier.createVBox(cr)
        vb_c1 = atelier.createHBox(vb_c)
        format_fat = atelier.createRadioButton(atelier.createLeft(vb_c1),_("FAT 32 (Windows)"))
        vb_c2 = atelier.createHBox(vb_c)
        format_ntfs = atelier.createRadioButton(atelier.createLeft(vb_c2),_("NTFS (Windows)"))
        vb_c3 = atelier.createHBox(vb_c)
        format_ext = atelier.createRadioButton(atelier.createLeft(vb_c3),_("ext4 (Linux)"))
        bb = atelier.createHBox(vb)
        executebt = atelier.createPushButton(bb,_("Execute"))
        cancelbt = atelier.createPushButton(bb,_("Cancel"))
        dialog.open()
        returncode = True
        while True:
            event = dialog.waitForEvent()
            if event.eventType() == yui.YEvent.CancelEvent:
                returncode = False
                break
            if event.widget() == executebt:
                if format_fat.value():
                    format_type = 'fat32'
                    format_label = label.value().upper()[:11]
                    break
                if format_ntfs.value():
                    format_type = 'ntfs'
                    format_label = label.value()[:32]
                    break
                if format_ext.value():
                    format_type = 'ext4'
                    format_label = label.value()
                    break
            if event.widget() == cancelbt:
                self.restore()
                returncode = False
                break
        dialog.destroy()
        if returncode:
            return True,format_type,format_label
        else:
            return False," "," "
        

    def ask_OK(self, info):
        yui.YUI.widgetFactory
        mgafactory = yui.YMGAWidgetFactory.getYMGAWidgetFactory(yui.YExternalWidgets.externalWidgetFactory("mga"))
        dlg = mgafactory.createDialogBox(yui.YMGAMessageBox.B_ONE)
        dlg.setTitle(info.title)
        dlg.setText(info.text, info.richtext)
        dlg.setButtonLabel("OK", yui.YMGAMessageBox.B_ONE)
        dlg.setMinSize(100, 10);
        return dlg.show() == yui.YMGAMessageBox.B_ONE

    def ask_YesOrNo(self, info):
        yui.YUI.widgetFactory
        mgafactory = yui.YMGAWidgetFactory.getYMGAWidgetFactory(yui.YExternalWidgets.externalWidgetFactory("mga"))
        dlg = mgafactory.createDialogBox(yui.YMGAMessageBox.B_TWO)
        dlg.setTitle(info.title)
        dlg.setText(info.text, info.richtext)
        dlg.setButtonLabel("Yes", yui.YMGAMessageBox.B_ONE)
        dlg.setButtonLabel("No",  yui.YMGAMessageBox.B_TWO)
        dlg.setMinSize(70, 8);
        return dlg.show() == yui.YMGAMessageBox.B_ONE

    def aboutDialog(self):
        yui.YUI.widgetFactory;
        mgafactory = yui.YMGAWidgetFactory.getYMGAWidgetFactory(yui.YExternalWidgets.externalWidgetFactory("mga"))
        dlg = mgafactory.createAboutDialog("About Isodumper", self.RELEASE, "GPLv2",
                                        "Oliver Grawert\nPapoteur", "A tool for writing ISO images to  a device", "")
        dlg.show();
        
    def nodevDialog(self):
        yui.YUI.widgetFactory
        mgafactory = yui.YMGAWidgetFactory.getYMGAWidgetFactory(yui.YExternalWidgets.externalWidgetFactory("mga"))
        dlg = mgafactory.createDialogBox(yui.YMGAMessageBox.B_TWO)
        dlg.setTitle("IsoDumper")
        dlg.setText("Warning\nNo target devices were found.\nYou need to plug in a USB Key to which the image can be written.")
        dlg.setButtonLabel("Refresh", yui.YMGAMessageBox.B_ONE)
        dlg.setButtonLabel("Cancel",  yui.YMGAMessageBox.B_TWO)
        dlg.setMinSize(70, 8);
        return dlg.show() == yui.YMGAMessageBox.B_ONE

    def handleevent(self):
        self.traitement=None
        while True:
            event = self.dialog.waitForEvent()
            if event.eventType() == yui.YEvent.CancelEvent:
                self.close()
                #self.dialog.destroy()
                break
            if event.widget() == self.quitbt:
                self.close()
                #self.dialog.destroy()
                break
            if event.widget() == self.ima:
                    self.img_name=yui.YUI.app().askForExistingFile('file:///home/'+self.user,"*.iso *.img","Choose an image")
                    self.ima.setLabel(self.img_name)
                   
                    self.activate_devicelist()
            if event.widget() == self.writebt:
                    self.do_write()
            if event.widget() == self.backupbt:
                    self.backup_go()
            if event.widget() == self.backup_select:
                    self.backup_img_name=yui.YUI.app().askForSaveFileName('file:///home/'+self.user,"*.img","Backup to:")
                    if self.backup_img_name != '':
                        self.backup_choosed()
            if event.widget() == self.formatbt:
                    code,format_type,name = self.ask_format()
                    if code:
                        self.do_format(format_type,name)
                    self.restore()
            try:
                if event.widget() == self.refreshbt:
                    self.update_list()
            except:
                pass
            try:
                if event.widget() == self.helpbt:
                    print("help")
                    self.help_dialog()
            except:
                pass
            try:
                if event.widget() == self.quitbt:
                    self.confirm_close()
            except:
                pass
            if event.widget() == self.aboutbt:
                self.aboutDialog()

if __name__ == "__main__":
    import sys
    user=sys.argv[1]
    app = IsoDumper(user)
    app.handleevent()