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#!/usr/bin/env python
##
# Copyright (c) 2007 Apple Inc.
#
# This is the MIT license. This software may also be distributed under the
# same terms as Python (the PSF license).
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
##
from __future__ import print_function
import sys
import os
import getopt
import zlib
import xattr
class NullsInString(Exception):
"""Nulls in string."""
def usage(e=None):
if e:
print(e)
print("")
name = os.path.basename(sys.argv[0])
print("usage: %s [-slz] file [file ...]" % (name,))
print(" %s -p [-slz] attr_name file [file ...]" % (name,))
print(" %s -w [-sz] attr_name attr_value file [file ...]" % (name,))
print(" %s -d [-s] attr_name file [file ...]" % (name,))
print(" %s -c [-s] file [file ...]" % (name,))
print("")
print("The first form lists the names of all xattrs on the given file(s).")
print("The second form (-p) prints the value of the xattr attr_name.")
print("The third form (-w) sets the value of the xattr attr_name to attr_value.")
print("The fourth form (-d) deletes the xattr attr_name.")
print("The fifth form (-c) deletes (clears) all xattrs.")
print("")
print("options:")
print(" -h: print this help")
print(" -s: act on symbolic links themselves rather than their targets")
print(" -l: print long format (attr_name: attr_value)")
print(" -z: compress or decompress (if compressed) attribute value in zip format")
if e:
return 64
else:
return 0
if sys.version_info < (3,):
ascii = repr
uchr = unichr
else:
uchr = chr
_FILTER = u''.join([(len(ascii(chr(x))) == 3) and uchr(x) or u'.' for x in range(256)])
def _dump(src, length=16):
result = []
for i in range(0, len(src), length):
s = src[i:i+length]
hexa = ' '.join(["%02X" % ord(x) for x in s])
printable = s.translate(_FILTER)
result.append("%04X %-*s %s\n" % (i, length*3, hexa, printable))
return ''.join(result)
def main(argv=sys.argv):
try:
(optargs, args) = getopt.getopt(argv[1:], "hlpwdzsc", ["help"])
except getopt.GetoptError as e:
return usage(e)
attr_name = None
long_format = False
read = False
write = False
delete = False
clear = False
nofollow = False
compress = lambda x: x
decompress = compress
errors = []
for opt, arg in optargs:
if opt in ("-h", "--help"):
return usage()
elif opt == "-l":
long_format = True
elif opt == "-s":
nofollow = True
elif opt == "-p":
read = True
if write or delete or clear:
return usage("-p not allowed with -w, -d or -c")
elif opt == "-w":
write = True
if read or delete or clear:
return usage("-w not allowed with -p, -d or -c")
elif opt == "-d":
delete = True
if read or write or clear:
return usage("-d not allowed with -p, -w or -c")
elif opt == "-c":
clear = True
if read or write or delete:
return usage("-c not allowed with -p, -w or -d")
elif opt == "-z":
compress = zlib.compress
decompress = zlib.decompress
if write or delete or clear:
if long_format:
return usage("-l not allowed with -w, -d or -c")
if read or write or delete:
if not args:
return usage("No attr_name")
attr_name = args.pop(0)
if write:
if not args:
return usage("No attr_value")
attr_value = args.pop(0).encode('utf-8')
if len(args) == 0:
return usage("No file")
if len(args) > 1:
multiple_files = True
else:
multiple_files = False
options = 0
if nofollow:
options |= xattr.XATTR_NOFOLLOW
for filename in args:
def onError(e):
errors.append(e)
if not os.path.exists(filename):
sys.stderr.write("No such file: %s\n" % (filename,))
else:
sys.stderr.write(str(e) + "\n")
try:
attrs = xattr.xattr(filename, options=options)
except (IOError, OSError) as e:
onError(e)
continue
if write:
try:
attrs[attr_name] = compress(attr_value)
except (IOError, OSError) as e:
onError(e)
continue
elif delete:
try:
del attrs[attr_name]
except (IOError, OSError) as e:
onError(e)
continue
except KeyError:
onError("No such xattr: %s" % (attr_name,))
continue
elif clear:
try:
attrs.clear()
except (IOError, OSError) as e:
onError(e)
continue
else:
try:
if read:
attr_names = (attr_name,)
else:
attr_names = attrs.keys()
except (IOError, OSError) as e:
onError(e)
continue
if multiple_files:
file_prefix = "%s: " % (filename,)
else:
file_prefix = ""
for attr_name in attr_names:
should_dump = False
try:
try:
attr_value = decompress(attrs[attr_name])
except zlib.error:
attr_value = attrs[attr_name]
try:
if b'\0' in attr_value:
# force dumping
raise NullsInString
attr_value = attr_value.decode('utf-8')
except (UnicodeDecodeError, NullsInString):
attr_value = attr_value.decode('latin-1')
should_dump = True
except KeyError:
onError("%sNo such xattr: %s" % (file_prefix, attr_name))
continue
if long_format:
if should_dump:
print("".join((file_prefix, "%s:" % (attr_name,))))
print(_dump(attr_value))
else:
print("".join((file_prefix, "%s: " % (attr_name,), attr_value)))
else:
if read:
if should_dump:
if file_prefix:
print(file_prefix)
print(_dump(attr_value))
else:
print("".join((file_prefix, attr_value)))
else:
print("".join((file_prefix, attr_name)))
return 1 if errors else 0
if __name__ == "__main__":
sys.exit(main(sys.argv))
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