82 lines
2.7 KiB
Python
82 lines
2.7 KiB
Python
# (c) 2012, Michael DeHaan <michael.dehaan@gmail.com>
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#
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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from __future__ import (absolute_import, division, print_function)
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__metaclass__ = type
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import os
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import select
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import shlex
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import subprocess
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import sys
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from ansible.module_utils.six import PY2, PY3
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from ansible.module_utils._text import to_bytes
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def run_cmd(cmd, live=False, readsize=10):
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# readsize = 10
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# On python2, shlex needs byte strings
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if PY2:
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cmd = to_bytes(cmd, errors='surrogate_or_strict')
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cmdargs = shlex.split(cmd)
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# subprocess should be passed byte strings. (on python2.6 it must be
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# passed byte strtings)
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cmdargs = [to_bytes(a, errors='surrogate_or_strict') for a in cmdargs]
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p = subprocess.Popen(cmdargs, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
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stdout = b''
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stderr = b''
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rpipes = [p.stdout, p.stderr]
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while True:
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rfd, wfd, efd = select.select(rpipes, [], rpipes, 1)
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if p.stdout in rfd:
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dat = os.read(p.stdout.fileno(), readsize)
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if live:
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# On python3, stdout has a codec to go from text type to bytes
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if PY3:
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sys.stdout.buffer.write(dat)
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else:
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sys.stdout.write(dat)
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stdout += dat
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if dat == b'':
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rpipes.remove(p.stdout)
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if p.stderr in rfd:
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dat = os.read(p.stderr.fileno(), readsize)
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stderr += dat
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if live:
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# On python3, stdout has a codec to go from text type to bytes
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if PY3:
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sys.stdout.buffer.write(dat)
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else:
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sys.stdout.write(dat)
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if dat == b'':
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rpipes.remove(p.stderr)
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# only break out if we've emptied the pipes, or there is nothing to
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# read from and the process has finished.
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if (not rpipes or not rfd) and p.poll() is not None:
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break
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# Calling wait while there are still pipes to read can cause a lock
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elif not rpipes and p.poll() is None:
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p.wait()
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return p.returncode, stdout, stderr
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