Attachment 11436 Details for Bug 25924 – Python3 program to fix Mageia-7.1 hybrid ISO MBR (2nd edition)

[patch] Python3 program to fix Mageia-7.1 hybrid ISO MBR (2nd edition)

mageia-iso-fix.py (text/plain), 1.46 KB, created by Ihar Areshchankau on 2019-12-29 10:42:58 CET

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Creator: Ihar Areshchankau

Created: 2019-12-29 10:42:58 CET

Size: 1.46 KB

patch

obsolete

>#mageia-iso-swap.py
>import sys, os
>def PrintMbrPartitionsTable (mbr, offset):
>	for i in range (0,4):
>		print (i+1, mbr[offset: offset + 0x10])
>		offset += 0x10
>if len (sys.argv) != 2:
>	print (" Mageia hybrid ISO image MBR patching utility.")
>	print (" Usage:")
>	print ("python3 mageia-iso-fix.py Mageia-...-i586.iso")
>else:
>	IsoFileName = sys.argv[1]
>	MbrPartitionsTableOffset = 0x1BE
>	MbrSignatureOffset = 510
>	if not os.path.isfile (IsoFileName):
>		print ("Error:", IsoFileName, "isn't a file name.")
>	else:
>		f = open (IsoFileName, "r+b")
>		sector = bytearray (f.read (512))
>		if sector[MbrSignatureOffset] != 0x55 or sector[MbrSignatureOffset + 1] != 0xAA:
>			print ("Error:", IsoFileName, "doesn't have MBR.")
>		else:
>			if sector[MbrPartitionsTableOffset + 16:MbrPartitionsTableOffset + 32] == bytearray ([0]*16):
>				print (IsoFileName, "doesn't need to be patched.")
>			else:
>				print ("Patching MBR partition table:")
>				print ("Partitions table before:")
>				PrintMbrPartitionsTable (sector, MbrPartitionsTableOffset)
>				sector[MbrPartitionsTableOffset:MbrPartitionsTableOffset + 16] = sector[MbrPartitionsTableOffset + 16:MbrPartitionsTableOffset + 32]
>				sector[MbrPartitionsTableOffset + 16:MbrPartitionsTableOffset + 32] = bytearray ([0] * 16)
>				print ("Partitions table after:")
>				PrintMbrPartitionsTable (sector, MbrPartitionsTableOffset)
>				f.seek (0)
>				f.write (sector)
>				print (IsoFileName, "is patched now.")
>		f.close ()

#mageia-iso-swap.py
import sys, os
def PrintMbrPartitionsTable (mbr, offset):
	for i in range (0,4):
		print (i+1, mbr[offset: offset + 0x10])
		offset += 0x10
if len (sys.argv) != 2:
	print (" Mageia hybrid ISO image MBR patching utility.")
	print (" Usage:")
	print ("python3 mageia-iso-fix.py Mageia-...-i586.iso")
else:
	IsoFileName = sys.argv[1]
	MbrPartitionsTableOffset = 0x1BE
	MbrSignatureOffset = 510
	if not os.path.isfile (IsoFileName):
		print ("Error:", IsoFileName, "isn't a file name.")
	else:
		f = open (IsoFileName, "r+b")
		sector = bytearray (f.read (512))
		if sector[MbrSignatureOffset] != 0x55 or sector[MbrSignatureOffset + 1] != 0xAA:
			print ("Error:", IsoFileName, "doesn't have MBR.")
		else:
			if sector[MbrPartitionsTableOffset + 16:MbrPartitionsTableOffset + 32] == bytearray ([0]*16):
				print (IsoFileName, "doesn't need to be patched.")
			else:
				print ("Patching MBR partition table:")
				print ("Partitions table before:")
				PrintMbrPartitionsTable (sector, MbrPartitionsTableOffset)
				sector[MbrPartitionsTableOffset:MbrPartitionsTableOffset + 16] = sector[MbrPartitionsTableOffset + 16:MbrPartitionsTableOffset + 32]
				sector[MbrPartitionsTableOffset + 16:MbrPartitionsTableOffset + 32] = bytearray ([0] * 16)
				print ("Partitions table after:")
				PrintMbrPartitionsTable (sector, MbrPartitionsTableOffset)
				f.seek (0)
				f.write (sector)
				print (IsoFileName, "is patched now.")
		f.close ()

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Attachments on bug 25924: 11418 | 11424 | 11425 | 11436