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Modified readmdir/readtree to make reading non-truncated data easier

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This commit is contained in:
Christopher Haster
2020-01-30 16:05:42 -06:00
parent fc354801fa
commit 75cd51b39e
2 changed files with 33 additions and 65 deletions
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37
scripts/readmdir.py
View File

@@ -2,6 +2,7 @@
import struct
import binascii
import sys
import itertools as it
TAG_TYPES = {
@@ -271,37 +272,39 @@ class MetadataPair:
raise KeyError(gmask, gtag)
def _dump_tags(self, tags, truncate=True):
sys.stdout.write("%-8s %-8s %-13s %4s %4s %s\n" % (
'off', 'tag', 'type', 'id', 'len',
'data (truncated)' if truncate else 12*' '+'data'))
def _dump_tags(self, tags, f=sys.stdout, truncate=True):
f.write("%-8s %-8s %-13s %4s %4s" % (
'off', 'tag', 'type', 'id', 'len'))
if truncate:
f.write(' data (truncated)')
f.write('\n')
for tag in tags:
sys.stdout.write("%08x: %08x %-13s %4s %4s" % (
f.write("%08x: %08x %-13s %4s %4s" % (
tag.off, tag,
tag.typerepr(), tag.idrepr(), tag.sizerepr()))
if truncate:
sys.stdout.write(" %-23s %-8s\n" % (
f.write(" %-23s %-8s\n" % (
' '.join('%02x' % c for c in tag.data[:8]),
''.join(c if c >= ' ' and c <= '~' else '.'
for c in map(chr, tag.data[:8]))))
else:
sys.stdout.write("\n")
f.write("\n")
for i in range(0, len(tag.data), 16):
sys.stdout.write("%08x: %-47s %-16s\n" % (
f.write(" %08x: %-47s %-16s\n" % (
tag.off+i,
' '.join('%02x' % c for c in tag.data[i:i+16]),
''.join(c if c >= ' ' and c <= '~' else '.'
for c in map(chr, tag.data[i:i+16]))))
def dump_tags(self, truncate=True):
self._dump_tags(self.tags, truncate=truncate)
def dump_tags(self, f=sys.stdout, truncate=True):
self._dump_tags(self.tags, f=f, truncate=truncate)
def dump_log(self, truncate=True):
self._dump_tags(self.log, truncate=truncate)
def dump_log(self, f=sys.stdout, truncate=True):
self._dump_tags(self.log, f=f, truncate=truncate)
def dump_all(self, truncate=True):
self._dump_tags(self.all_, truncate=truncate)
def dump_all(self, f=sys.stdout, truncate=True):
self._dump_tags(self.all_, f=f, truncate=truncate)
def main(args):
blocks = []
@@ -337,10 +340,10 @@ if __name__ == "__main__":
help="First block address for finding the metadata pair.")
parser.add_argument('block2', nargs='?', type=lambda x: int(x, 0),
help="Second block address for finding the metadata pair.")
parser.add_argument('-a', '--all', action='store_true',
help="Show all tags in log, included tags in corrupted commits.")
parser.add_argument('-l', '--log', action='store_true',
help="Show tags in log.")
parser.add_argument('-a', '--all', action='store_true',
help="Show all tags in log, included tags in corrupted commits.")
parser.add_argument('-T', '--no-truncate', action='store_true',
help="Don't truncate large amounts of data in tags.")
help="Don't truncate large amounts of data.")
sys.exit(main(parser.parse_args()))

61
scripts/readtree.py
View File

@@ -13,45 +13,6 @@ def popc(x):
def ctz(x):
return len(bin(x)) - len(bin(x).rstrip('0'))
def dumptags(args, mdir, f):
if args.all:
tags = mdir.all_
elif args.log:
tags = mdir.log
else:
tags = mdir.tags
for k, tag in enumerate(tags):
f.write("tag %08x %s" % (tag, tag.typerepr()))
if tag.id != 0x3ff:
f.write(" id %d" % tag.id)
if tag.size != 0x3ff:
f.write(" size %d" % tag.size)
if tag.is_('name'):
f.write(" name %s" %
json.dumps(tag.data.decode('utf8')))
if tag.is_('dirstruct'):
f.write(" dir {%#x, %#x}" % struct.unpack(
'<II', tag.data[:8].ljust(8, b'\xff')))
if tag.is_('ctzstruct'):
f.write(" ctz {%#x} size %d" % struct.unpack(
'<II', tag.data[:8].ljust(8, b'\xff')))
if tag.is_('inlinestruct'):
f.write(" inline size %d" % tag.size)
if tag.is_('gstate'):
f.write(" 0x%s" % ''.join('%02x' % c for c in tag.data))
if tag.is_('tail'):
f.write(" tail {%#x, %#x}" % struct.unpack(
'<II', tag.data[:8].ljust(8, b'\xff')))
f.write("\n")
if args.data:
for i in range(0, len(tag.data), 16):
f.write(" %-47s %-16s\n" % (
' '.join('%02x' % c for c in tag.data[i:i+16]),
''.join(c if c >= ' ' and c <= '~' else '.'
for c in map(chr, tag.data[i:i+16]))))
def dumpentries(args, mdir, f):
for k, id_ in enumerate(mdir.ids):
name = mdir[Tag('name', id_, 0)]
@@ -72,8 +33,8 @@ def dumpentries(args, mdir, f):
if args.data and struct_.is_('inlinestruct'):
for i in range(0, len(struct_.data), 16):
f.write(" %-47s %-16s\n" % (
' '.join('%02x' % c for c in struct_.data[i:i+16]),
f.write(" %08x: %-47s %-16s\n" % (
i, ' '.join('%02x' % c for c in struct_.data[i:i+16]),
''.join(c if c >= ' ' and c <= '~' else '.'
for c in map(chr, struct_.data[i:i+16]))))
elif args.data and struct_.is_('ctzstruct'):
@@ -95,8 +56,8 @@ def dumpentries(args, mdir, f):
it.chain.from_iterable(reversed(data)), size))
for i in range(0, min(len(data), 256)
if not args.no_truncate else len(data), 16):
f.write(" %-47s %-16s\n" % (
' '.join('%02x' % c for c in data[i:i+16]),
f.write(" %08x: %-47s %-16s\n" % (
i, ' '.join('%02x' % c for c in data[i:i+16]),
''.join(c if c >= ' ' and c <= '~' else '.'
for c in map(chr, data[i:i+16]))))
@@ -239,8 +200,12 @@ def main(args):
' (corrupted)' if not mdir else ''))
f = io.StringIO()
if args.tags or args.all or args.log:
dumptags(args, mdir, f)
if args.tags:
mdir.dump_tags(f, truncate=not args.no_truncate)
elif args.log:
mdir.dump_log(f, truncate=not args.no_truncate)
elif args.all:
mdir.dump_all(f, truncate=not args.no_truncate)
else:
dumpentries(args, mdir, f)
@@ -285,12 +250,12 @@ if __name__ == "__main__":
help="Show contents of metadata-pairs/directories.")
parser.add_argument('-t', '--tags', action='store_true',
help="Show metadata tags instead of reconstructing entries.")
parser.add_argument('-a', '--all', action='store_true',
help="Show all tags in log, included tags in corrupted commits.")
parser.add_argument('-l', '--log', action='store_true',
help="Show tags in log.")
parser.add_argument('-a', '--all', action='store_true',
help="Show all tags in log, included tags in corrupted commits.")
parser.add_argument('-d', '--data', action='store_true',
help="Also show the raw contents of files/attrs/tags.")
parser.add_argument('-T', '--no-truncate', action='store_true',
help="Don't truncate large amounts of data in files.")
help="Don't truncate large amounts of data.")
sys.exit(main(parser.parse_args()))