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gsm-fw/cdg/makecdg.sh: added some comments
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Fri, 26 Sep 2014 00:34:44 +0000
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1 You are looking at the source for the TIFFS In Vitro Analyzer utility. You may
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2 have downloaded it either as a separate package or as part of the larger
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3 freecalypso-sw suite.
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4
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5 See TIFFS-Overview (in ../doc if you are working with the full freecalypso-sw
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6 source tree) for a general description of what TIFFS is and why it matters.
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7
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8 The utility contained in the present package runs on a general purpose GNU/Linux
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9 (or other Unix) host and enables "in vitro" examination of Flash File System
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10 images read out of TI-based GSM devices. Using this utility, you can list the
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11 directory and file content of an FFS image, cat any individual file in the FFS,
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12 or extract the complete FFS content into your regular Unix file system. Some
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13 "forensic" operations are also supported: by listing the inode array, one can
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14 deduce the order in which the present FFS content got created, and see what
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15 files have been overwritten or deleted in the span of still-visible history.
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16 One can then cat the old byte content of those overwritten or deleted files,
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17 if those data chunks are still in the FFS image (i.e., if the flash sector in
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18 question has not been reclaimed yet).
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19
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20 Compilation and installation are straightforward: run 'make' to compile the
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21 source; you should get 3 executable binaries named tiffs, mokoffs and pirffs;
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22 then run 'make install' as root to install them in /usr/local/bin. The binary
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23 named tiffs is the main program; mokoffs and pirffs are wrappers that simplify
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24 the most common current use cases.
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25
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26 To install somewhere other than /usr/local/bin, edit the INSTBIN= setting in
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27 the subdirectory Makefiles. You will also need to edit
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28 tiffs-wrappers/installpath.c accordingly, as the mokoffs and pirffs wrappers
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29 are designed to exec tiffs by its absolute installed pathname.
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30
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31 See Usage for the usage instructions.