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Extended dbglfs.py to show file data structures

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You can now pass -s/--structs to dbglfs.py to show any file data
structures:

  $ ./scripts/dbglfs.py disk -B4096 -f -s -t
  littlefs v2.0 0x{0,1}.9cf, rev 3, weight 0.256
  {0000,0001}:  -1.1 hello  reg 128, trunk 0x0.993 128
    0000.0993:           .->    0-15 shrubinlined w16 16     6b 75 72 65 65 67 73 63  kureegsc
                       .-+->   16-31 shrubinlined w16 16     6b 65 6a 79 68 78 6f 77  kejyhxow
                       | .->   32-47 shrubinlined w16 16     65 6f 66 75 76 61 6a 73  eofuvajs
                     .-+-+->   48-63 shrubinlined w16 16     6e 74 73 66 67 61 74 6a  ntsfgatj
                     |   .->   64-79 shrubinlined w16 16     70 63 76 79 6c 6e 72 66  pcvylnrf
                     | .-+->   80-95 shrubinlined w16 16     70 69 73 64 76 70 6c 6f  pisdvplo
                     | | .->  96-111 shrubinlined w16 16     74 73 65 69 76 7a 69 6c  tseivzil
                     +-+-+-> 112-127 shrubinlined w16 16     7a 79 70 61 77 72 79 79  zypawryy

This supports the same -b/-t/-i options found in dbgbtree.py, with the
one exception being -z/--struct-depth which is lowercase to avoid
conflict with the -Z/--depth used to indicate the filesystem tree depth.

I think this is a surprisingly reasonable way to show the inner
structure of files without clobbering the user's console with file
contents.

Don't worry, if clobbering is desired, -T/--no-truncate still dumps all
of the file content.

Though it's still up to the user to manually apply the sprout/shrub
overlay. That step is still complex enough to not implement in this
tool yet.

I
This commit is contained in:
Christopher Haster
2023-10-10 14:00:24 -05:00
parent 66e6ce4bfb
commit c8b60f173e
3 changed files with 738 additions and 17 deletions
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8
scripts/dbgbtree.py
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@@ -1002,10 +1002,6 @@ if __name__ == "__main__":
'-T', '--no-truncate',
action='store_true',
help="Don't truncate, show the full contents.")
parser.add_argument(
'-i', '--inner',
action='store_true',
help="Show inner branches.")
parser.add_argument(
'-t', '--tree',
action='store_true',
@@ -1014,6 +1010,10 @@ if __name__ == "__main__":
'-b', '--btree',
action='store_true',
help="Show the underlying B-tree.")
parser.add_argument(
'-i', '--inner',
action='store_true',
help="Show inner branches.")
parser.add_argument(
'-Z', '--depth',
nargs='?',