def fgetattr(filename, compact=False):
"""Get the list of set system attributes for file specified by 'path'.
Returns a list of verbose attributes by default. If 'compact' is True,
return a string consisting of compact option identifiers."""
from pkg.misc import force_text
if not isinstance(filename, six.string_types):
raise TypeError("filename must be string type")
cattrs = ffi.new("char[F_ATTR_ALL]")
response = ffi.new("nvlist_t **")
# ffi.gc return a new cdata object that points to the same data. Later,
# when this new cdata object is garbage-collected, the destructor
# (in this case 'lib.nvlist_free' will be called.
response[0] = ffi.gc(response[0], lib.nvlist_free)
bval = ffi.new("boolean_t *")
pair = ffi.NULL
next_pair = ffi.new("nvpair_t *")
attr_list = []
fd = os.open(filename, os.O_RDONLY)
if fd == -1:
raise OSError(ffi.errno, os.strerror(ffi.errno), filename)
if lib.fgetattr(fd, lib.XATTR_VIEW_READWRITE, response):
os.close(fd)
raise OSError(ffi.errno, os.strerror(ffi.errno), filename)
os.close(fd)
count = 0
pair = lib.nvlist_next_nvpair(response[0], pair)
while pair != ffi.NULL:
name = lib.nvpair_name(pair)
next_pair = lib.nvlist_next_nvpair(response[0], pair)
# we ignore all non-boolean attrs
if lib.nvpair_type(pair) != lib.DATA_TYPE_BOOLEAN_VALUE:
pair = next_pair
continue
if lib.nvpair_value_boolean_value(pair, bval) != 0:
raise OSError("could not read attr value")
if bval[0]:
if compact:
if count >= F_ATTR_ALL:
raise OSError("Too many system attributes found")
cattrs[count] = lib.attr_to_option(lib.name_to_attr(name))[0]
count += 1
else:
# ffi.string returns a bytes
string = force_text(ffi.string(name))
if string:
attr_list.append(string)
pair = next_pair
if compact:
cattrs = force_text(ffi.string(cattrs))
return cattrs
return attr_list
def get_attr_dict():
"""Get a dictionary containing all supported system attributes in the form:
{ <verbose_name>: <compact_option>,
...
}
"""
from pkg.misc import force_text
sys_attrs = {}
for i in range(F_ATTR_ALL):
if not is_supported(i):
continue
key = force_text(ffi.string(lib.attr_to_name(i)))
value = force_text(ffi.string(lib.attr_to_option(i)))
sys_attrs.setdefault(key, value)
return sys_attrs
