## # 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))