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onekey-sec / ubi_reader

Collection of Python scripts for reading information about and extracting data from UBI and UBIFS images.
GNU General Public License v3.0
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Change First UBI PEB Number to 42.0 #55

Closed pruwait closed 2 years ago

pruwait commented 2 years ago

My original image:

ubireader_display_info  /hassio/share/ubifs-root/15-0-systm2.bin
UBI File
---------------------
        Min I/O: 2048
        LEB Size: 126976
        PEB Size: 131072
        Total Block Count: 258
        Data Block Count: 242
        Layout Block Count: 2
        Internal Volume Block Count: 0
        Unknown Block Count: 0
        First UBI PEB Number: 42.0

        Image: 251495409
        ---------------------
                Image Sequence Num: 251495409
                Volume Name:rootfs
                Volume Name:usrfs
                PEB Range: 0 - 257

                Volume: rootfs
                ---------------------
                        Vol ID: 0
                        Name: rootfs
                        Block Count: 242

                        Volume Record
                        ---------------------
                                alignment: 1
                                crc: '0x30fb56ba'
                                data_pad: 0
                                errors: ''
                                flags: 0
                                name: 'rootfs'
                                name_len: 6
                                padding: '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
                                rec_index: 0
                                reserved_pebs: 496
                                upd_marker: 0
                                vol_type: 'dynamic'

                Volume: usrfs
                ---------------------
                        Vol ID: 1
                        Name: usrfs
                        Block Count: 14

                        Volume Record
                        ---------------------
                                alignment: 1
                                crc: '0x4f66b6e1'
                                data_pad: 0
                                errors: ''
                                flags: 'autoresize'
                                name: 'usrfs'
                                name_len: 5
                                padding: '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
                                rec_index: 1
                                reserved_pebs: 14
                                upd_marker: 0
                                vol_type: 'dynamic'

My repacked image:

ubireader_display_info sys2.ubi
UBI File
---------------------
        Min I/O: 2048
        LEB Size: 126976
        PEB Size: 131072
        Total Block Count: 258
        Data Block Count: 242
        Layout Block Count: 2
        Internal Volume Block Count: 0
        Unknown Block Count: 0
        First UBI PEB Number: 0

        Image: 251495409
        ---------------------
                Image Sequence Num: 251495409
                Volume Name:rootfs
                Volume Name:usrfs
                PEB Range: 0 - 257

How can I get First UBI PEB Number: 42.0?

jrspruitt commented 2 years ago

Hi pruwait,

I am unaware of any way to specify the starting PEB when creating an image. Perhaps compiling the tools for making the image you could hack in an offset?

-Jason