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#!/usr/bin/env python2
import os
import sys
from optparse import OptionParser
import xattr
def handle_textencoding(attr):
### required for Python's handling of NULL strings.
attr_null_replace = (attr.encode('hex').decode('hex')).replace('\x00',
'\\000')
return attr_null_replace
def getfattr(path, option):
attr = xattr.getxattr(path, option.name)
encoded_attr = attr
if option.encoding == "text":
## special case handle it.
encoded_attr = handle_textencoding(attr)
else:
encoded_attr = attr.encode(option.encoding)
if option.onlyvalues:
print (encoded_attr)
return
print_getfattr (path, option, encoded_attr)
return
def print_getfattr (path, option, encoded_attr=None):
if encoded_attr:
if option.encoding == "hex":
print ("%s=0x%s" % (option.name, encoded_attr))
elif option.encoding == "base64":
print ("%s=0s%s" % (option.name, encoded_attr))
else:
print ("%s=\"%s\"" % (option.name, encoded_attr))
else:
print option.name
return
def print_header (path, absnames):
if absnames:
print ("# file: %s" % path)
else:
print ("getfattr: Removing leading '/' from absolute path names")
print ("# file: %s" % path[1:])
if __name__ == '__main__':
usage = "usage: %prog [-n name|-d] [-e en] [-m pattern] path...."
parser = OptionParser(usage=usage)
parser.add_option("-n", action="store", dest="name", type="string",
help="Dump the value of the named extended attribute"
" extended attribute.")
parser.add_option("-d", action="store_true", dest="dump",
help="Dump the values of all extended attributes"
" associated with pathname.")
parser.add_option("-e", action="store", dest="encoding", type="string",
default="base64",
help="Encode values after retrieving"
" them. Valid values of [en] are `text`, `hex`,"
" and `base64`. Values encoded as text strings are"
" enclosed in double quotes (\"), while strings"
" encoded as hexidecimal and base64 are prefixed with"
" 0x and 0s, respectively.")
parser.add_option("-m", action="store", dest="pattern", type="string",
help="Only include attributes with names matching the"
" regular expression pattern. The default value for"
" pattern is \"^user\\.\", which includes all the"
" attributes in the user namespace. Specify \"-\" for"
" including all attributes. Refer to attr(5) for a more"
" detailed discussion of namespaces.")
parser.add_option("--absolute-names", action="store_true", dest="absnames",
help="Do not strip leading slash characters ('/')."
" The default behaviour is to strip leading slash characters.")
parser.add_option("--only-values", action="store_true", dest="onlyvalues",
help="Dump out the raw extended attribute value(s)"
" without encoding them.")
(option, args) = parser.parse_args()
if not args:
print ("Usage: getfattr [-hRLP] [-n name|-d] [-e en] [-m pattern]"
" path...")
print ("Try `getfattr --help' for more information.")
sys.exit(1)
if option.dump and option.name:
print ("-d and -n are mutually exclusive...")
sys.exit(1)
if option.pattern and option.name:
print ("-m and -n are mutually exclusive...")
sys.exit(1)
if option.encoding:
if (not (option.encoding.strip() == "hex" or
option.encoding.strip() == "base64" or
option.encoding.strip() == "text")):
print ("unrecognized encoding parameter... %s, please use"
" `text`, `base64` or `hex`" % option.encoding)
sys.exit(1)
args[0] = os.path.abspath(args[0])
if option.name:
print_header(args[0], option.absnames)
try:
getfattr(args[0], option)
except KeyError as err:
print ("Invalid key %s" % err)
sys.exit(1)
except IOError as err:
print (err)
sys.exit(1)
if option.pattern:
print_header(args[0], option.absnames)
try:
xattrs = xattr.listxattr(args[0])
for attr in xattrs:
if option.dump:
option.name = attr.encode('utf-8')
getfattr(args[0], option)
else:
option.name = attr.encode('utf-8')
print_getfattr(args[0], option, None)
except IOError as err:
print (err)
sys.exit(1)
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