ab3eb972bf
The repo is python 3 only, remove six usage. Change-Id: I8c0b0446a88a12b5da8c6502f8eee75ed1793095
55 lines
1.8 KiB
Python
55 lines
1.8 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import binascii
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import logging
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import os
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import os.path
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import random
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import subprocess
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LOG = logging.getLogger(__name__)
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def get_random_string(nbytes=8):
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"""Return a fixed-length random string
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:rtype: str
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"""
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try:
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# NOTE(dhellmann): Not all systems support urandom().
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# hexlify returns binary, decode to convert to str.
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val = binascii.hexlify(os.urandom(nbytes)).decode('utf-8')
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except Exception as e:
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print('ERROR, perhaps urandom is not supported: %s' % e)
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val = u''.join(u'%02x' % random.randrange(256)
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for i in range(nbytes))
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return val
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def check_output(*args, **kwds):
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"""Unicode-aware wrapper for subprocess.check_output"""
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process = subprocess.Popen(stdout=subprocess.PIPE,
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stderr=subprocess.PIPE,
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*args, **kwds)
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output, errors = process.communicate()
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retcode = process.poll()
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if errors:
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LOG.debug('ran: %s', ' '.join(*args))
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LOG.debug('returned: %s', retcode)
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LOG.debug('error output: %s', errors.rstrip())
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LOG.debug('regular output: %s', output.rstrip())
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if retcode:
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LOG.debug('raising error')
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raise subprocess.CalledProcessError(retcode, args, output=output)
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return output.decode('utf-8')
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