mirror of
https://github.com/openvswitch/ovs
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6c88547dd0
Argparse has some convenient advantages over optparse including the ability to handle optional arguments to flags. It also supports parsing arguments as well as options. This patch copies argparse.py from Python 2.7 into a newly created compat directory. It made some very minor syntactic updates in the process. Platforms which have a Python version too old to include argparse by default will have this compat version installed as a workaround.
595 lines
22 KiB
Python
595 lines
22 KiB
Python
# This file is from Python 2.5. It has been modified by adding this
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# license header, which is copied from the LICENSE file distributed
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# with Python.
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#
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# PYTHON SOFTWARE FOUNDATION LICENSE VERSION 2
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# --------------------------------------------
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#
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# 1. This LICENSE AGREEMENT is between the Python Software Foundation
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# ("PSF"), and the Individual or Organization ("Licensee") accessing and
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# otherwise using this software ("Python") in source or binary form and
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# its associated documentation.
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#
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# 2. Subject to the terms and conditions of this License Agreement, PSF
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# hereby grants Licensee a nonexclusive, royalty-free, world-wide
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# license to reproduce, analyze, test, perform and/or display publicly,
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# prepare derivative works, distribute, and otherwise use Python
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# alone or in any derivative version, provided, however, that PSF's
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# License Agreement and PSF's notice of copyright, i.e., "Copyright (c)
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# 2001, 2002, 2003, 2004, 2005, 2006, 2007 Python Software Foundation;
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# All Rights Reserved" are retained in Python alone or in any derivative
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# version prepared by Licensee.
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#
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# 3. In the event Licensee prepares a derivative work that is based on
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# or incorporates Python or any part thereof, and wants to make
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# the derivative work available to others as provided herein, then
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# Licensee hereby agrees to include in any such work a brief summary of
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# the changes made to Python.
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#
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# 4. PSF is making Python available to Licensee on an "AS IS"
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# basis. PSF MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR
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# IMPLIED. BY WAY OF EXAMPLE, BUT NOT LIMITATION, PSF MAKES NO AND
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# DISCLAIMS ANY REPRESENTATION OR WARRANTY OF MERCHANTABILITY OR FITNESS
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# FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF PYTHON WILL NOT
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# INFRINGE ANY THIRD PARTY RIGHTS.
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#
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# 5. PSF SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF PYTHON
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# FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS AS
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# A RESULT OF MODIFYING, DISTRIBUTING, OR OTHERWISE USING PYTHON,
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# OR ANY DERIVATIVE THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF.
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#
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# 6. This License Agreement will automatically terminate upon a material
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# breach of its terms and conditions.
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#
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# 7. Nothing in this License Agreement shall be deemed to create any
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# relationship of agency, partnership, or joint venture between PSF and
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# Licensee. This License Agreement does not grant permission to use PSF
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# trademarks or trade name in a trademark sense to endorse or promote
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# products or services of Licensee, or any third party.
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#
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# 8. By copying, installing or otherwise using Python, Licensee
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# agrees to be bound by the terms and conditions of this License
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# Agreement.
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r"""UUID objects (universally unique identifiers) according to RFC 4122.
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This module provides immutable UUID objects (class UUID) and the functions
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uuid1(), uuid3(), uuid4(), uuid5() for generating version 1, 3, 4, and 5
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UUIDs as specified in RFC 4122.
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If all you want is a unique ID, you should probably call uuid1() or uuid4().
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Note that uuid1() may compromise privacy since it creates a UUID containing
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the computer's network address. uuid4() creates a random UUID.
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Typical usage:
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>>> import uuid
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# make a UUID based on the host ID and current time
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>>> uuid.uuid1()
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UUID('a8098c1a-f86e-11da-bd1a-00112444be1e')
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# make a UUID using an MD5 hash of a namespace UUID and a name
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>>> uuid.uuid3(uuid.NAMESPACE_DNS, 'python.org')
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UUID('6fa459ea-ee8a-3ca4-894e-db77e160355e')
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# make a random UUID
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>>> uuid.uuid4()
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UUID('16fd2706-8baf-433b-82eb-8c7fada847da')
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# make a UUID using a SHA-1 hash of a namespace UUID and a name
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>>> uuid.uuid5(uuid.NAMESPACE_DNS, 'python.org')
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UUID('886313e1-3b8a-5372-9b90-0c9aee199e5d')
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# make a UUID from a string of hex digits (braces and hyphens ignored)
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>>> x = uuid.UUID('{00010203-0405-0607-0809-0a0b0c0d0e0f}')
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# convert a UUID to a string of hex digits in standard form
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>>> str(x)
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'00010203-0405-0607-0809-0a0b0c0d0e0f'
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# get the raw 16 bytes of the UUID
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>>> x.bytes
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'\x00\x01\x02\x03\x04\x05\x06\x07\x08\t\n\x0b\x0c\r\x0e\x0f'
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# make a UUID from a 16-byte string
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>>> uuid.UUID(bytes=x.bytes)
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UUID('00010203-0405-0607-0809-0a0b0c0d0e0f')
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"""
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__author__ = 'Ka-Ping Yee <ping@zesty.ca>'
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RESERVED_NCS, RFC_4122, RESERVED_MICROSOFT, RESERVED_FUTURE = [
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'reserved for NCS compatibility', 'specified in RFC 4122',
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'reserved for Microsoft compatibility', 'reserved for future definition']
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class UUID(object):
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"""Instances of the UUID class represent UUIDs as specified in RFC 4122.
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UUID objects are immutable, hashable, and usable as dictionary keys.
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Converting a UUID to a string with str() yields something in the form
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'12345678-1234-1234-1234-123456789abc'. The UUID constructor accepts
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five possible forms: a similar string of hexadecimal digits, or a tuple
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of six integer fields (with 32-bit, 16-bit, 16-bit, 8-bit, 8-bit, and
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48-bit values respectively) as an argument named 'fields', or a string
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of 16 bytes (with all the integer fields in big-endian order) as an
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argument named 'bytes', or a string of 16 bytes (with the first three
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fields in little-endian order) as an argument named 'bytes_le', or a
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single 128-bit integer as an argument named 'int'.
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UUIDs have these read-only attributes:
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bytes the UUID as a 16-byte string (containing the six
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integer fields in big-endian byte order)
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bytes_le the UUID as a 16-byte string (with time_low, time_mid,
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and time_hi_version in little-endian byte order)
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fields a tuple of the six integer fields of the UUID,
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which are also available as six individual attributes
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and two derived attributes:
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time_low the first 32 bits of the UUID
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time_mid the next 16 bits of the UUID
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time_hi_version the next 16 bits of the UUID
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clock_seq_hi_variant the next 8 bits of the UUID
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clock_seq_low the next 8 bits of the UUID
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node the last 48 bits of the UUID
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time the 60-bit timestamp
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clock_seq the 14-bit sequence number
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hex the UUID as a 32-character hexadecimal string
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int the UUID as a 128-bit integer
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urn the UUID as a URN as specified in RFC 4122
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variant the UUID variant (one of the constants RESERVED_NCS,
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RFC_4122, RESERVED_MICROSOFT, or RESERVED_FUTURE)
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version the UUID version number (1 through 5, meaningful only
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when the variant is RFC_4122)
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"""
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def __init__(self, hex=None, bytes=None, bytes_le=None, fields=None,
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int=None, version=None):
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r"""Create a UUID from either a string of 32 hexadecimal digits,
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a string of 16 bytes as the 'bytes' argument, a string of 16 bytes
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in little-endian order as the 'bytes_le' argument, a tuple of six
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integers (32-bit time_low, 16-bit time_mid, 16-bit time_hi_version,
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8-bit clock_seq_hi_variant, 8-bit clock_seq_low, 48-bit node) as
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the 'fields' argument, or a single 128-bit integer as the 'int'
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argument. When a string of hex digits is given, curly braces,
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hyphens, and a URN prefix are all optional. For example, these
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expressions all yield the same UUID:
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UUID('{12345678-1234-5678-1234-567812345678}')
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UUID('12345678123456781234567812345678')
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UUID('urn:uuid:12345678-1234-5678-1234-567812345678')
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UUID(bytes='\x12\x34\x56\x78'*4)
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UUID(bytes_le='\x78\x56\x34\x12\x34\x12\x78\x56' +
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'\x12\x34\x56\x78\x12\x34\x56\x78')
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UUID(fields=(0x12345678, 0x1234, 0x5678, 0x12, 0x34, 0x567812345678))
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UUID(int=0x12345678123456781234567812345678)
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Exactly one of 'hex', 'bytes', 'bytes_le', 'fields', or 'int' must
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be given. The 'version' argument is optional; if given, the resulting
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UUID will have its variant and version set according to RFC 4122,
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overriding the given 'hex', 'bytes', 'bytes_le', 'fields', or 'int'.
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"""
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if [hex, bytes, bytes_le, fields, int].count(None) != 4:
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raise TypeError('need one of hex, bytes, bytes_le, fields, or int')
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if hex is not None:
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hex = hex.replace('urn:', '').replace('uuid:', '')
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hex = hex.strip('{}').replace('-', '')
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if len(hex) != 32:
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raise ValueError('badly formed hexadecimal UUID string')
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int = long(hex, 16)
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if bytes_le is not None:
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if len(bytes_le) != 16:
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raise ValueError('bytes_le is not a 16-char string')
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bytes = (bytes_le[3] + bytes_le[2] + bytes_le[1] + bytes_le[0] +
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bytes_le[5] + bytes_le[4] + bytes_le[7] + bytes_le[6] +
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bytes_le[8:])
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if bytes is not None:
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if len(bytes) != 16:
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raise ValueError('bytes is not a 16-char string')
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int = long(('%02x'*16) % tuple(map(ord, bytes)), 16)
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if fields is not None:
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if len(fields) != 6:
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raise ValueError('fields is not a 6-tuple')
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(time_low, time_mid, time_hi_version,
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clock_seq_hi_variant, clock_seq_low, node) = fields
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if not 0 <= time_low < 1<<32L:
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raise ValueError('field 1 out of range (need a 32-bit value)')
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if not 0 <= time_mid < 1<<16L:
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raise ValueError('field 2 out of range (need a 16-bit value)')
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if not 0 <= time_hi_version < 1<<16L:
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raise ValueError('field 3 out of range (need a 16-bit value)')
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if not 0 <= clock_seq_hi_variant < 1<<8L:
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raise ValueError('field 4 out of range (need an 8-bit value)')
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if not 0 <= clock_seq_low < 1<<8L:
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raise ValueError('field 5 out of range (need an 8-bit value)')
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if not 0 <= node < 1<<48L:
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raise ValueError('field 6 out of range (need a 48-bit value)')
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clock_seq = (clock_seq_hi_variant << 8L) | clock_seq_low
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int = ((time_low << 96L) | (time_mid << 80L) |
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(time_hi_version << 64L) | (clock_seq << 48L) | node)
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if int is not None:
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if not 0 <= int < 1<<128L:
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raise ValueError('int is out of range (need a 128-bit value)')
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if version is not None:
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if not 1 <= version <= 5:
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raise ValueError('illegal version number')
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# Set the variant to RFC 4122.
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int &= ~(0xc000 << 48L)
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int |= 0x8000 << 48L
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# Set the version number.
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int &= ~(0xf000 << 64L)
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int |= version << 76L
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self.__dict__['int'] = int
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def __cmp__(self, other):
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if isinstance(other, UUID):
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return cmp(self.int, other.int)
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return NotImplemented
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def __hash__(self):
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return hash(self.int)
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def __int__(self):
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return self.int
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def __repr__(self):
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return 'UUID(%r)' % str(self)
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def __setattr__(self, name, value):
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raise TypeError('UUID objects are immutable')
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def __str__(self):
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hex = '%032x' % self.int
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return '%s-%s-%s-%s-%s' % (
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hex[:8], hex[8:12], hex[12:16], hex[16:20], hex[20:])
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def get_bytes(self):
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bytes = ''
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for shift in range(0, 128, 8):
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bytes = chr((self.int >> shift) & 0xff) + bytes
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return bytes
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bytes = property(get_bytes)
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def get_bytes_le(self):
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bytes = self.bytes
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return (bytes[3] + bytes[2] + bytes[1] + bytes[0] +
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bytes[5] + bytes[4] + bytes[7] + bytes[6] + bytes[8:])
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bytes_le = property(get_bytes_le)
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def get_fields(self):
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return (self.time_low, self.time_mid, self.time_hi_version,
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self.clock_seq_hi_variant, self.clock_seq_low, self.node)
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fields = property(get_fields)
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def get_time_low(self):
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return self.int >> 96L
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time_low = property(get_time_low)
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def get_time_mid(self):
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return (self.int >> 80L) & 0xffff
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time_mid = property(get_time_mid)
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def get_time_hi_version(self):
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return (self.int >> 64L) & 0xffff
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time_hi_version = property(get_time_hi_version)
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def get_clock_seq_hi_variant(self):
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return (self.int >> 56L) & 0xff
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clock_seq_hi_variant = property(get_clock_seq_hi_variant)
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def get_clock_seq_low(self):
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return (self.int >> 48L) & 0xff
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clock_seq_low = property(get_clock_seq_low)
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def get_time(self):
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return (((self.time_hi_version & 0x0fffL) << 48L) |
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(self.time_mid << 32L) | self.time_low)
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time = property(get_time)
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def get_clock_seq(self):
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return (((self.clock_seq_hi_variant & 0x3fL) << 8L) |
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self.clock_seq_low)
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clock_seq = property(get_clock_seq)
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def get_node(self):
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return self.int & 0xffffffffffff
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node = property(get_node)
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def get_hex(self):
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return '%032x' % self.int
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hex = property(get_hex)
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def get_urn(self):
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return 'urn:uuid:' + str(self)
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urn = property(get_urn)
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def get_variant(self):
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if not self.int & (0x8000 << 48L):
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return RESERVED_NCS
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elif not self.int & (0x4000 << 48L):
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return RFC_4122
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elif not self.int & (0x2000 << 48L):
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return RESERVED_MICROSOFT
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else:
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return RESERVED_FUTURE
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variant = property(get_variant)
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def get_version(self):
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# The version bits are only meaningful for RFC 4122 UUIDs.
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if self.variant == RFC_4122:
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return int((self.int >> 76L) & 0xf)
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version = property(get_version)
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def _find_mac(command, args, hw_identifiers, get_index):
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import os
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for dir in ['', '/sbin/', '/usr/sbin']:
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executable = os.path.join(dir, command)
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if not os.path.exists(executable):
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continue
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try:
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# LC_ALL to get English output, 2>/dev/null to
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# prevent output on stderr
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cmd = 'LC_ALL=C %s %s 2>/dev/null' % (executable, args)
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pipe = os.popen(cmd)
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except IOError:
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continue
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for line in pipe:
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words = line.lower().split()
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for i in range(len(words)):
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if words[i] in hw_identifiers:
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return int(words[get_index(i)].replace(':', ''), 16)
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return None
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def _ifconfig_getnode():
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"""Get the hardware address on Unix by running ifconfig."""
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# This works on Linux ('' or '-a'), Tru64 ('-av'), but not all Unixes.
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for args in ('', '-a', '-av'):
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mac = _find_mac('ifconfig', args, ['hwaddr', 'ether'], lambda i: i+1)
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if mac:
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return mac
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import socket
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ip_addr = socket.gethostbyname(socket.gethostname())
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# Try getting the MAC addr from arp based on our IP address (Solaris).
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mac = _find_mac('arp', '-an', [ip_addr], lambda i: -1)
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if mac:
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return mac
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# This might work on HP-UX.
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mac = _find_mac('lanscan', '-ai', ['lan0'], lambda i: 0)
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if mac:
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return mac
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return None
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def _ipconfig_getnode():
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"""Get the hardware address on Windows by running ipconfig.exe."""
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import os, re
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dirs = ['', r'c:\windows\system32', r'c:\winnt\system32']
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try:
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import ctypes
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buffer = ctypes.create_string_buffer(300)
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ctypes.windll.kernel32.GetSystemDirectoryA(buffer, 300)
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dirs.insert(0, buffer.value.decode('mbcs'))
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except:
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pass
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for dir in dirs:
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try:
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pipe = os.popen(os.path.join(dir, 'ipconfig') + ' /all')
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except IOError:
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continue
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for line in pipe:
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value = line.split(':')[-1].strip().lower()
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if re.match('([0-9a-f][0-9a-f]-){5}[0-9a-f][0-9a-f]', value):
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return int(value.replace('-', ''), 16)
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def _netbios_getnode():
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"""Get the hardware address on Windows using NetBIOS calls.
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See http://support.microsoft.com/kb/118623 for details."""
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import win32wnet, netbios
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ncb = netbios.NCB()
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ncb.Command = netbios.NCBENUM
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ncb.Buffer = adapters = netbios.LANA_ENUM()
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adapters._pack()
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if win32wnet.Netbios(ncb) != 0:
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return
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adapters._unpack()
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for i in range(adapters.length):
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ncb.Reset()
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ncb.Command = netbios.NCBRESET
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ncb.Lana_num = ord(adapters.lana[i])
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if win32wnet.Netbios(ncb) != 0:
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continue
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ncb.Reset()
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ncb.Command = netbios.NCBASTAT
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ncb.Lana_num = ord(adapters.lana[i])
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ncb.Callname = '*'.ljust(16)
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ncb.Buffer = status = netbios.ADAPTER_STATUS()
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if win32wnet.Netbios(ncb) != 0:
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continue
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status._unpack()
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bytes = map(ord, status.adapter_address)
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return ((bytes[0]<<40L) + (bytes[1]<<32L) + (bytes[2]<<24L) +
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(bytes[3]<<16L) + (bytes[4]<<8L) + bytes[5])
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# Thanks to Thomas Heller for ctypes and for his help with its use here.
|
|
|
|
# If ctypes is available, use it to find system routines for UUID generation.
|
|
_uuid_generate_random = _uuid_generate_time = _UuidCreate = None
|
|
try:
|
|
import ctypes, ctypes.util
|
|
_buffer = ctypes.create_string_buffer(16)
|
|
|
|
# The uuid_generate_* routines are provided by libuuid on at least
|
|
# Linux and FreeBSD, and provided by libc on Mac OS X.
|
|
for libname in ['uuid', 'c']:
|
|
try:
|
|
lib = ctypes.CDLL(ctypes.util.find_library(libname))
|
|
except:
|
|
continue
|
|
if hasattr(lib, 'uuid_generate_random'):
|
|
_uuid_generate_random = lib.uuid_generate_random
|
|
if hasattr(lib, 'uuid_generate_time'):
|
|
_uuid_generate_time = lib.uuid_generate_time
|
|
|
|
# On Windows prior to 2000, UuidCreate gives a UUID containing the
|
|
# hardware address. On Windows 2000 and later, UuidCreate makes a
|
|
# random UUID and UuidCreateSequential gives a UUID containing the
|
|
# hardware address. These routines are provided by the RPC runtime.
|
|
# NOTE: at least on Tim's WinXP Pro SP2 desktop box, while the last
|
|
# 6 bytes returned by UuidCreateSequential are fixed, they don't appear
|
|
# to bear any relationship to the MAC address of any network device
|
|
# on the box.
|
|
try:
|
|
lib = ctypes.windll.rpcrt4
|
|
except:
|
|
lib = None
|
|
_UuidCreate = getattr(lib, 'UuidCreateSequential',
|
|
getattr(lib, 'UuidCreate', None))
|
|
except:
|
|
pass
|
|
|
|
def _unixdll_getnode():
|
|
"""Get the hardware address on Unix using ctypes."""
|
|
_uuid_generate_time(_buffer)
|
|
return UUID(bytes=_buffer.raw).node
|
|
|
|
def _windll_getnode():
|
|
"""Get the hardware address on Windows using ctypes."""
|
|
if _UuidCreate(_buffer) == 0:
|
|
return UUID(bytes=_buffer.raw).node
|
|
|
|
def _random_getnode():
|
|
"""Get a random node ID, with eighth bit set as suggested by RFC 4122."""
|
|
import random
|
|
return random.randrange(0, 1<<48L) | 0x010000000000L
|
|
|
|
_node = None
|
|
|
|
def getnode():
|
|
"""Get the hardware address as a 48-bit positive integer.
|
|
|
|
The first time this runs, it may launch a separate program, which could
|
|
be quite slow. If all attempts to obtain the hardware address fail, we
|
|
choose a random 48-bit number with its eighth bit set to 1 as recommended
|
|
in RFC 4122.
|
|
"""
|
|
|
|
global _node
|
|
if _node is not None:
|
|
return _node
|
|
|
|
import sys
|
|
if sys.platform == 'win32':
|
|
getters = [_windll_getnode, _netbios_getnode, _ipconfig_getnode]
|
|
else:
|
|
getters = [_unixdll_getnode, _ifconfig_getnode]
|
|
|
|
for getter in getters + [_random_getnode]:
|
|
try:
|
|
_node = getter()
|
|
except:
|
|
continue
|
|
if _node is not None:
|
|
return _node
|
|
|
|
_last_timestamp = None
|
|
|
|
def uuid1(node=None, clock_seq=None):
|
|
"""Generate a UUID from a host ID, sequence number, and the current time.
|
|
If 'node' is not given, getnode() is used to obtain the hardware
|
|
address. If 'clock_seq' is given, it is used as the sequence number;
|
|
otherwise a random 14-bit sequence number is chosen."""
|
|
|
|
# When the system provides a version-1 UUID generator, use it (but don't
|
|
# use UuidCreate here because its UUIDs don't conform to RFC 4122).
|
|
if _uuid_generate_time and node is clock_seq is None:
|
|
_uuid_generate_time(_buffer)
|
|
return UUID(bytes=_buffer.raw)
|
|
|
|
global _last_timestamp
|
|
import time
|
|
nanoseconds = int(time.time() * 1e9)
|
|
# 0x01b21dd213814000 is the number of 100-ns intervals between the
|
|
# UUID epoch 1582-10-15 00:00:00 and the Unix epoch 1970-01-01 00:00:00.
|
|
timestamp = int(nanoseconds/100) + 0x01b21dd213814000L
|
|
if timestamp <= _last_timestamp:
|
|
timestamp = _last_timestamp + 1
|
|
_last_timestamp = timestamp
|
|
if clock_seq is None:
|
|
import random
|
|
clock_seq = random.randrange(1<<14L) # instead of stable storage
|
|
time_low = timestamp & 0xffffffffL
|
|
time_mid = (timestamp >> 32L) & 0xffffL
|
|
time_hi_version = (timestamp >> 48L) & 0x0fffL
|
|
clock_seq_low = clock_seq & 0xffL
|
|
clock_seq_hi_variant = (clock_seq >> 8L) & 0x3fL
|
|
if node is None:
|
|
node = getnode()
|
|
return UUID(fields=(time_low, time_mid, time_hi_version,
|
|
clock_seq_hi_variant, clock_seq_low, node), version=1)
|
|
|
|
def uuid3(namespace, name):
|
|
"""Generate a UUID from the MD5 hash of a namespace UUID and a name."""
|
|
import md5
|
|
hash = md5.md5(namespace.bytes + name).digest()
|
|
return UUID(bytes=hash[:16], version=3)
|
|
|
|
def uuid4():
|
|
"""Generate a random UUID."""
|
|
|
|
# When the system provides a version-4 UUID generator, use it.
|
|
if _uuid_generate_random:
|
|
_uuid_generate_random(_buffer)
|
|
return UUID(bytes=_buffer.raw)
|
|
|
|
# Otherwise, get randomness from urandom or the 'random' module.
|
|
try:
|
|
import os
|
|
return UUID(bytes=os.urandom(16), version=4)
|
|
except:
|
|
import random
|
|
bytes = [chr(random.randrange(256)) for i in range(16)]
|
|
return UUID(bytes=bytes, version=4)
|
|
|
|
def uuid5(namespace, name):
|
|
"""Generate a UUID from the SHA-1 hash of a namespace UUID and a name."""
|
|
import sha
|
|
hash = sha.sha(namespace.bytes + name).digest()
|
|
return UUID(bytes=hash[:16], version=5)
|
|
|
|
# The following standard UUIDs are for use with uuid3() or uuid5().
|
|
|
|
NAMESPACE_DNS = UUID('6ba7b810-9dad-11d1-80b4-00c04fd430c8')
|
|
NAMESPACE_URL = UUID('6ba7b811-9dad-11d1-80b4-00c04fd430c8')
|
|
NAMESPACE_OID = UUID('6ba7b812-9dad-11d1-80b4-00c04fd430c8')
|
|
NAMESPACE_X500 = UUID('6ba7b814-9dad-11d1-80b4-00c04fd430c8')
|