def _losetup_list_parse(output):
"""
Parse the output of ``losetup --all`` which varies depending on the
privileges of the user.
:param unicode output: The output of ``losetup --all``.
:returns: A ``list`` of
2-tuple(FilePath(device_file), FilePath(backing_file))
"""
devices = []
for line in output.splitlines():
parts = line.split(u":", 2)
if len(parts) != 3:
continue
device_file, attributes, backing_file = parts
device_file = FilePath(device_file.strip().encode("utf-8"))
# Trim everything from the first left bracket, skipping over the
# possible inode number which appears only when run as root.
left_bracket_offset = backing_file.find(b"(")
backing_file = backing_file[left_bracket_offset + 1:]
# Trim everything from the right most right bracket
right_bracket_offset = backing_file.rfind(b")")
backing_file = backing_file[:right_bracket_offset]
# Trim a possible embedded deleted flag
expected_suffix_list = [b"(deleted)"]
for suffix in expected_suffix_list:
offset = backing_file.rfind(suffix)
if offset > -1:
backing_file = backing_file[:offset]
# Remove the space that may have been between the path and the deleted
# flag.
backing_file = backing_file.rstrip()
backing_file = FilePath(backing_file.encode("utf-8"))
devices.append((device_file, backing_file))
return devices
def _losetup_list_parse(output):
"""
Parse the output of ``losetup --all`` which varies depending on the
privileges of the user.
:param unicode output: The output of ``losetup --all``.
:returns: A ``list`` of
2-tuple(FilePath(device_file), FilePath(backing_file))
"""
devices = []
for line in output.splitlines():
parts = line.split(u":", 2)
if len(parts) != 3:
continue
device_file, _, backing_file = parts
device_file = FilePath(device_file.strip().encode("utf-8"))
# Trim everything from the first left bracket, skipping over the
# possible inode number which appears only when run as root.
left_bracket_offset = backing_file.find(b"(")
backing_file = backing_file[left_bracket_offset + 1:]
# Trim everything from the right most right bracket
right_bracket_offset = backing_file.rfind(b")")
backing_file = backing_file[:right_bracket_offset]
# Trim a possible embedded deleted flag
expected_suffix_list = [b"(deleted)"]
for suffix in expected_suffix_list:
offset = backing_file.rfind(suffix)
if offset > -1:
backing_file = backing_file[:offset]
# Remove the space that may have been between the path and the deleted
# flag.
backing_file = backing_file.rstrip()
backing_file = FilePath(backing_file.encode("utf-8"))
devices.append((device_file, backing_file))
return devices
