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restore file permissions when extracting zipfile

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This commit is contained in:
Kurt Neufeld 2016-06-03 12:08:42 -07:00
parent 608af12b1d
commit b04e434ad4
1 changed files with 15 additions and 5 deletions
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20
src/wormhole/cli/cmd_receive.py
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@ -285,14 +285,24 @@ class TwistedReceiver:
os.path.basename(self.abs_destname))
def _write_directory(self, f):
def extract_file( zf, info, extract_dir ):
"""
the zipfile module does not restore file permissions
so we'll do it manually
"""
zf.extract( info.filename, path=extract_dir )
# not sure why zipfiles store the perms 16 bits away but they do
perm = info.external_attr >> 16L
out_path = os.path.join( extract_dir, info.filename )
os.chmod( out_path, perm )
self._msg(u"Unpacking zipfile..")
with self.args.timing.add("unpack zip"):
with zipfile.ZipFile(f, "r", zipfile.ZIP_DEFLATED) as zf:
zf.extractall(path=self.abs_destname)
# extractall() appears to offer some protection against
# malicious pathnames. For example, "/tmp/oops" and
# "../tmp/oops" both do the same thing as the (safe)
# "tmp/oops".
for info in zf.infolist():
extract_file( zf, info, self.abs_destname )
self._msg(u"Received files written to %s/" %
os.path.basename(self.abs_destname))
f.close()