+
+def is_writeable(device):
+ """Check if the device is writeable for the current user
+
+ @device: partition where bootloader should be installed to"""
+
+ if not device:
+ return False
+ #raise Exception, "no device for checking write permissions"
+
+ if not os.path.exists(device):
+ return False
+
+ return os.access(device, os.W_OK) and os.access(device, os.R_OK)
+
+
+def install_mbr(device):
+ """Install a default master boot record on given device
+
+ @device: device where MBR should be installed to"""
+
+ if not is_writeable(device):
+ raise IOError, "device not writeable for user"
+
+ if options.lilo:
+ lilo = options.lilo
+ else:
+ from platform import architecture
+ if architecture()[0] == '64bit':
+ lilo = '/usr/share/grml2usb/lilo/lilo.static.amd64'
+ else:
+ lilo = '/usr/share/grml2usb/lilo/lilo.static.i386'
+
+ if not is_exe(lilo):
+ raise Exception, "lilo executable can not be execute"
+
+ if options.dryrun:
+ logging.info("Would install MBR running lilo and using syslinux.")
+ return 0
+
+ # to support -A for extended partitions:
+ logging.info("Installing MBR")
+ logging.debug("%s -S /dev/null -M %s ext" % (lilo, device))
+ proc = subprocess.Popen([lilo, "-S", "/dev/null", "-M", device, "ext"])
+ proc.wait()
+ if proc.returncode != 0:
+ raise Exception, "error executing lilo"
+
+ # activate partition:
+ logging.debug("%s -S /dev/null -A %s 1" % (lilo, device))
+ if not options.dryrun:
+ proc = subprocess.Popen([lilo, "-S", "/dev/null", "-A", device, "1"])
+ proc.wait()
+ if proc.returncode != 0:
+ raise Exception, "error executing lilo"
+
+ # lilo's mbr is broken, use the one from syslinux instead:
+ if not os.path.isfile("/usr/lib/syslinux/mbr.bin"):
+ raise Exception, "/usr/lib/syslinux/mbr.bin can not be read"
+
+ logging.debug("cat /usr/lib/syslinux/mbr.bin > %s" % device)
+ if not options.dryrun:
+ try:
+ # TODO -> use Popen instead?
+ retcode = subprocess.call("cat /usr/lib/syslinux/mbr.bin > "+ device, shell=True)
+ if retcode < 0:
+ logging.critical("Error copying MBR to device (%s)" % retcode)
+ except OSError, error:
+ logging.critical("Execution failed:", error)
+
+
+def register_tmpfile(path):
+ """TODO
+ """
+
+ tmpfiles.add(path)
+
+
+def unregister_tmpfile(path):
+ """TODO
+ """
+
+ if path in tmpfiles:
+ tmpfiles.remove(path)
+
+
+def register_mountpoint(target):
+ """TODO
+ """
+
+ mounted.add(target)
+
+
+def unregister_mountpoint(target):
+ """TODO
+ """
+
+ if target in mounted:
+ mounted.remove(target)
+
+
+def mount(source, target, options):
+ """Mount specified source on given target
+
+ @source: name of device/ISO that should be mounted
+ @target: directory where the ISO should be mounted to
+ @options: mount specific options"""
+
+ # notice: options.dryrun does not work here, as we have to
+ # locate files and identify the grml flavour
+ logging.debug("mount %s %s %s" % (options, source, target))
+ proc = subprocess.Popen(["mount"] + list(options) + [source, target])
+ proc.wait()
+ if proc.returncode != 0:
+ raise Exception, "Error executing mount"
+ else:
+ logging.debug("register_mountpoint(%s)" % target)
+ register_mountpoint(target)
+
+
+def unmount(target, options):
+ """Unmount specified target
+
+ @target: target where something is mounted on and which should be unmounted
+ @options: options for umount command"""
+
+ # make sure we unmount only already mounted targets
+ target_unmount = False
+ mounts = open('/proc/mounts').readlines()
+ mountstring = re.compile(".*%s.*" % re.escape(target))
+ for line in mounts:
+ if re.match(mountstring, line):
+ target_unmount = True
+
+ if not target_unmount:
+ logging.debug("%s not mounted anymore" % target)
+ else:
+ logging.debug("umount %s %s" % (list(options), target))
+ proc = subprocess.Popen(["umount"] + list(options) + [target])
+ proc.wait()
+ if proc.returncode != 0:
+ raise Exception, "Error executing umount"
+ else:
+ logging.debug("unregister_mountpoint(%s)" % target)
+ unregister_mountpoint(target)
+
+
+def check_for_usbdevice(device):
+ """Check whether the specified device is a removable USB device
+
+ @device: device name, like /dev/sda1 or /dev/sda
+ """
+
+ usbdevice = re.match(r'/dev/(.*?)\d*$', device).group(1)
+ usbdevice = os.path.realpath('/sys/class/block/' + usbdevice + '/removable')
+ if os.path.isfile(usbdevice):
+ is_usb = open(usbdevice).readline()
+ if is_usb == "1":
+ return 0
+ else:
+ return 1
+
+
+def check_for_fat(partition):
+ """Check whether specified partition is a valid VFAT/FAT16 filesystem
+
+ @partition: device name of partition"""
+
+ try:
+ udev_info = subprocess.Popen(["/lib/udev/vol_id", "-t", partition],stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+ filesystem = udev_info.communicate()[0].rstrip()
+
+ if udev_info.returncode == 2:
+ raise Exception, "Failed to read device %s - wrong UID / permissions?" % partition
+
+ if filesystem != "vfat":
+ raise Exception, "Device %s does not contain a FAT16 partition." % partition
+
+ except OSError:
+ raise Exception, "Sorry, /lib/udev/vol_id not available."
+
+
+def mkdir(directory):
+ """Simple wrapper around os.makedirs to get shell mkdir -p behaviour"""
+
+ if not os.path.isdir(directory):
+ try:
+ os.makedirs(directory)
+ except OSError:
+ # just silently pass as it's just fine it the directory exists
+ pass
+
+
+def copy_grml_files(grml_flavour, iso_mount, target):
+ """Copy files from ISO on given target"""
+
+ # TODO
+ # * provide alternative search_file() if file information is stored in a config.ini file?
+ # * catch "install: .. No space left on device" & CO
+ # * abstract copy logic to make the code shorter and get rid of spaghettis ;)
+
+ if options.dryrun:
+ logging.info("Would copy files to %s", iso_mount)
+ elif not options.bootloaderonly:
+ logging.info("Copying files. This might take a while....")
+
+ squashfs = search_file(grml_flavour + '.squashfs', iso_mount)
+ squashfs_target = target + '/live/'
+ execute(mkdir, squashfs_target)
+
+ # use install(1) for now to make sure we can write the files afterwards as normal user as well
+ logging.debug("cp %s %s" % (squashfs, target + '/live/' + grml_flavour + '.squashfs'))
+ proc = subprocess.Popen(["install", "--mode=664", squashfs, squashfs_target + grml_flavour + ".squashfs"])
+ proc.wait()
+
+ filesystem_module = search_file('filesystem.module', iso_mount)
+ logging.debug("cp %s %s" % (filesystem_module, squashfs_target + grml_flavour + '.module'))
+ proc = subprocess.Popen(["install", "--mode=664", filesystem_module, squashfs_target + grml_flavour + '.module'])
+ proc.wait()
+
+ release_target = target + '/boot/release/' + grml_flavour
+ execute(mkdir, release_target)
+
+ kernel = search_file('linux26', iso_mount)
+ logging.debug("cp %s %s" % (kernel, release_target + '/linux26'))
+ proc = subprocess.Popen(["install", "--mode=664", kernel, release_target + '/linux26'])
+ proc.wait()
+
+ initrd = search_file('initrd.gz', iso_mount)
+ logging.debug("cp %s %s" % (initrd, release_target + '/initrd.gz'))
+ proc = subprocess.Popen(["install", "--mode=664", initrd, release_target + '/initrd.gz'])
+ proc.wait()
+
+ if not options.copyonly:
+ syslinux_target = target + '/boot/syslinux/'
+ execute(mkdir, syslinux_target)
+
+ logo = search_file('logo.16', iso_mount)
+ logging.debug("cp %s %s" % (logo, syslinux_target + 'logo.16'))
+ proc = subprocess.Popen(["install", "--mode=664", logo, syslinux_target + 'logo.16'])
+ proc.wait()
+
+ for ffile in 'f2', 'f3', 'f4', 'f5', 'f6', 'f7', 'f8', 'f9', 'f10':
+ bootsplash = search_file(ffile, iso_mount)
+ logging.debug("cp %s %s" % (bootsplash, syslinux_target + ffile))
+ proc = subprocess.Popen(["install", "--mode=664", bootsplash, syslinux_target + ffile])
+ proc.wait()
+
+ grub_target = target + '/boot/grub/'
+ execute(mkdir, grub_target)
+
+ if not os.path.isfile("/usr/share/grml2usb/grub/splash.xpm.gz"):
+ logging.critical("Error: /usr/share/grml2usb/grub/splash.xpm.gz can not be read.")
+ raise
+ else:
+ logging.debug("cp /usr/share/grml2usb/grub/splash.xpm.gz %s" % grub_target + 'splash.xpm.gz')
+ proc = subprocess.Popen(["install", "--mode=664", '/usr/share/grml2usb/grub/splash.xpm.gz', grub_target + 'splash.xpm.gz'])
+ proc.wait()
+
+ if not os.path.isfile("/usr/share/grml2usb/grub/stage2_eltorito"):
+ logging.critical("Error: /usr/share/grml2usb/grub/stage2_eltorito can not be read.")
+ raise
+ else:
+ logging.debug("cp /usr/share/grml2usb/grub/stage2_eltorito to %s" % grub_target + 'stage2_eltorito')
+ proc = subprocess.Popen(["install", "--mode=664", '/usr/share/grml2usb/grub/stage2_eltorito', grub_target + 'stage2_eltorito'])
+ proc.wait()
+
+ if not options.dryrun:
+ logging.debug("Generating grub configuration")
+ #with open("...", "w") as f:
+ #f.write("bla bla bal")
+ grub_config_file = open(grub_target + 'menu.lst', 'w')
+ grub_config_file.write(generate_grub_config(grml_flavour))
+ grub_config_file.close()
+
+ logging.info("Generating syslinux configuration")
+ syslinux_cfg = syslinux_target + 'syslinux.cfg'
+
+ # install main configuration only *once*, no matter how many ISOs we have:
+ if os.path.isfile(syslinux_cfg):
+ string = open(syslinux_cfg).readline()
+ main_identifier = re.compile(".*main config generated at: %s.*" % re.escape(str(datestamp)))
+ if not re.match(main_identifier, string):
+ syslinux_config_file = open(syslinux_cfg, 'w')
+ logging.info("Notice: grml flavour %s is being installed as the default booting system." % grml_flavour)
+ syslinux_config_file.write(generate_main_syslinux_config(grml_flavour, options.bootoptions))
+ syslinux_config_file.close()
+ else:
+ syslinux_config_file = open(syslinux_cfg, 'w')
+ syslinux_config_file.write(generate_main_syslinux_config(grml_flavour, options.bootoptions))
+ syslinux_config_file.close()
+
+ # install flavour specific configuration only *once* as well
+ # kind of ugly - I'm pretty sure this could be smoother...
+ flavour_config = True
+ if os.path.isfile(syslinux_cfg):
+ string = open(syslinux_cfg).readlines()
+ logging.info("Notice: you can boot flavour %s using '%s' on the commandline." % (grml_flavour, grml_flavour))
+ flavour = re.compile("grml2usb for %s: %s" % (re.escape(grml_flavour), re.escape(str(datestamp))))
+ for line in string:
+ if flavour.match(line):
+ flavour_config = False
+
+
+ if flavour_config:
+ syslinux_config_file = open(syslinux_cfg, 'a')
+ syslinux_config_file.write(generate_flavour_specific_syslinux_config(grml_flavour, options.bootoptions))
+ syslinux_config_file.close( )
+
+ logging.debug("Generating isolinux/syslinux splash %s" % syslinux_target + 'boot.msg')
+ isolinux_splash = open(syslinux_target + 'boot.msg', 'w')
+ isolinux_splash.write(generate_isolinux_splash(grml_flavour))
+ isolinux_splash.close( )
+
+
+ # make sure we sync filesystems before returning
+ proc = subprocess.Popen(["sync"])
+ proc.wait()
+
+
+def uninstall_files(device):
+ """Get rid of all grml files on specified device
+
+ @device: partition where grml2usb files should be removed from"""
+
+ # TODO
+ logging.critical("TODO: uninstalling files from %s not yet implement, sorry." % device)
+
+
+def identify_grml_flavour(mountpath):
+ """Get name of grml flavour
+
+ @mountpath: path where the grml ISO is mounted to
+ @return: name of grml-flavour"""
+
+ version_file = search_file('grml-version', mountpath)
+
+ if version_file == "":
+ logging.critical("Error: could not find grml-version file.")
+ raise
+
+ try:
+ tmpfile = open(version_file, 'r')
+ grml_info = tmpfile.readline()
+ grml_flavour = re.match(r'[\w-]*', grml_info).group()
+ except TypeError:
+ raise
+ except:
+ logging.critical("Unexpected error:", sys.exc_info()[0])
+ raise
+
+ return grml_flavour
+
+
+def handle_iso(iso, device):
+ """Main logic for mounting ISOs and copying files.
+
+ @iso: full path to the ISO that should be installed to the specified device
+ @device: partition where the specified ISO should be installed to"""
+
+ logging.info("Using ISO %s" % iso)
+
+ if os.path.isdir(iso):
+ logging.critical("TODO: /live/image handling not yet implemented - sorry") # TODO
+ sys.exit(1)
+ else:
+ iso_mountpoint = tempfile.mkdtemp()
+ register_tmpfile(iso_mountpoint)
+ remove_iso_mountpoint = True
+
+ if not os.path.isfile(iso):
+ logging.critical("Fatal: specified ISO %s could not be read" % iso)
+ cleanup()
+ sys.exit(1)
+
+ mount(iso, iso_mountpoint, ["-o", "loop", "-t", "iso9660"])
+
+ if os.path.isdir(device):
+ logging.info("Specified target is a directory, not mounting therefore.")
+ device_mountpoint = device
+ remove_device_mountpoint = False
+ skip_mbr = True
+
+ else:
+ device_mountpoint = tempfile.mkdtemp()
+ register_tmpfile(device_mountpoint)
+ remove_device_mountpoint = True
+ try:
+ mount(device, device_mountpoint, "")
+ except Exception, error:
+ logging.critical("Fatal: %s" % error)
+ cleanup()
+
+ try:
+ grml_flavour = identify_grml_flavour(iso_mountpoint)
+ logging.info("Identified grml flavour \"%s\"." % grml_flavour)
+ copy_grml_files(grml_flavour, iso_mountpoint, device_mountpoint)
+ except TypeError:
+ logging.critical("Fatal: a critical error happend during execution, giving up")
+ sys.exit(1)
+ finally:
+ if os.path.isdir(iso_mountpoint) and remove_iso_mountpoint:
+ unmount(iso_mountpoint, "")
+
+ os.rmdir(iso_mountpoint)
+ unregister_tmpfile(iso_mountpoint)
+
+ if remove_device_mountpoint:
+ unmount(device_mountpoint, "")
+
+ if os.path.isdir(device_mountpoint):
+ os.rmdir(device_mountpoint)
+ unregister_tmpfile(device_mountpoint)
+
+ # grml_flavour_short = grml_flavour.replace('-','')
+ # logging.debug("grml_flavour_short = %s" % grml_flavour_short)
+