X-Git-Url: https://git.grml.org/?p=grml2usb.git;a=blobdiff_plain;f=grml2usb;h=ab0ad63189e31299bc785be9269fdcaacf3a0651;hp=b0a1fc231504bccc6b6fc591aeb11fc0f84e61f3;hb=360c9e5b51ef3d640ed6343da2babbe646415465;hpb=a06f95e130756c62301da0ef35c133e78c82ce2f

diff --git a/grml2usb b/grml2usb
index b0a1fc2..ab0ad63 100755
--- a/grml2usb
+++ b/grml2usb
@@ -40,6 +40,7 @@ GRML_FLAVOURS = set()  # which flavours are being installed?
 GRML_DEFAULT = None
 UUID = None
 SYSLINUX_LIBS = "/usr/lib/syslinux/"
+GPT_HEADER = "\x55\xaa\x45\x46\x49\x20\x50\x41\x52\x54" # original GPT header
 
 RE_PARTITION = re.compile(r'([a-z/]*?)(\d+)$')
 RE_P_PARTITION = re.compile(r'(.*?\d+)p(\d+)$')
@@ -311,16 +312,20 @@ def search_file(filename, search_path='/bin' + os.pathsep + '/usr/bin', lst_retu
 def check_uid_root():
     """Check for root permissions"""
     if not os.geteuid() == 0:
-        sys.exit("Error: please run this script with uid 0 (root).")
+        raise CriticalException("please run this script with uid 0 (root).")
 
 
 def check_boot_flag(device):
     boot_dev, x = get_device_from_partition(device)
 
     with open(boot_dev, 'r') as image:
-        data = image.read(512)
+        data = image.read(520)
         bootcode = data[440:]
-        if bootcode[6] == '\x80':
+        gpt_data = bootcode[70:80]
+
+        if gpt_data == GPT_HEADER:
+            logging.info("GPT detected, skipping bootflag check")
+        elif bootcode[6] == '\x80':
             logging.debug("bootflag is enabled")
         else:
             logging.debug("bootflag is NOT enabled")
@@ -540,7 +545,7 @@ def install_mbr(mbrtemplate, device, partition, ismirbsdmbr=True):
     if not os.path.isfile(mbrtemplate):
         logging.error('Error installing MBR (either try --syslinux-mbr or '
             'install missing file "%s"?)', mbrtemplate)
-        raise CriticalException("Error: %s can not be read.", mbrtemplate)
+        raise CriticalException("%s can not be read." % mbrtemplate)
 
     if partition is not None and ((partition < 0) or (partition > 3)):
         logging.warn("Cannot activate partition %d", partition)
@@ -1379,7 +1384,7 @@ def handle_syslinux_config(grml_flavour, target):
 
     # install main configuration only *once*, no matter how many ISOs we have:
     syslinux_config_file = open(syslinux_cfg, 'w')
-    syslinux_config_file.write("TIMEOUT 300\n")
+    syslinux_config_file.write("timeout 300\n")
     syslinux_config_file.write("include vesamenu.cfg\n")
     syslinux_config_file.close()
 
@@ -1674,8 +1679,7 @@ def check_options(opts):
     @opts option dict from OptionParser
     """
     if opts.grubmbr and not opts.grub:
-        logging.critical("Error: --grub-mbr requires --grub option.")
-        sys.exit(1)
+        raise CriticalException("--grub-mbr requires --grub option.")
 
 
 def check_programs():