# Copyright 2013-2014 Eucalyptus Systems, Inc.
#
# Redistribution and use of this software in source and binary forms,
# with or without modification, are permitted provided that the following
# conditions are met:
#
# Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
import os
import subprocess
import threading
def close_all_fds(except_fds=None):
except_filenos = [1, 2]
if except_fds is not None:
for except_fd in except_fds:
if except_fd is None:
pass
elif isinstance(except_fd, int):
except_filenos.append(except_fd)
elif hasattr(except_fd, 'fileno'):
except_filenos.append(except_fd.fileno())
else:
raise ValueError('{0} must be an int or have a fileno method'
.format(repr(except_fd)))
fileno_ranges = []
next_range_min = 0
for except_fileno in sorted(except_filenos):
if except_fileno > next_range_min:
fileno_ranges.append((next_range_min, except_fileno))
next_range_min = max(next_range_min, except_fileno + 1)
fileno_ranges.append((next_range_min, 1024))
for fileno_range in fileno_ranges:
os.closerange(fileno_range[0], fileno_range[1])
def get_cert_fingerprint(cert_filename):
openssl = subprocess.Popen(('openssl', 'x509', '-in', cert_filename,
'-fingerprint', '-sha1', '-noout'),
stdout=subprocess.PIPE)
(fingerprint, _) = openssl.communicate()
return fingerprint.strip().rsplit('=', 1)[-1].replace(':', '').lower()
def open_pipe_fileobjs():
pipe_r, pipe_w = os.pipe()
return os.fdopen(pipe_r), os.fdopen(pipe_w, 'w')
def waitpid_in_thread(pid):
"""
Start a thread that calls os.waitpid on a particular PID to prevent
zombie processes from hanging around after they have finished.
"""
pid_thread = threading.Thread(target=_wait_for_pid, args=(pid,))
pid_thread.daemon = True
pid_thread.start()
def _wait_for_pid(pid):
if pid:
try:
os.waitpid(pid, 0)
except OSError:
pass