110 lines
3.9 KiB
Python
110 lines
3.9 KiB
Python
# Copyright 2015 Canonical, Ltd.
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or (at your option) any later version.
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#
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# This program 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 Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import crypt
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import logging
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import os
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import random
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import subprocess
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log = logging.getLogger("subiquitycore.utils")
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def _clean_env(env):
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if env is None:
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env = os.environ.copy()
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else:
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env = env.copy()
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# Do we always want to do this?
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env['LC_ALL'] = 'C'
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# Maaaybe want to remove SNAP here too.
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return env
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def run_command(cmd, *, input=None, stdout=subprocess.PIPE,
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stderr=subprocess.PIPE, encoding='utf-8', errors='replace',
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env=None, **kw):
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"""A wrapper around subprocess.run with logging and different defaults.
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We never ever want a subprocess to inherit our file descriptors!
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"""
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if input is None:
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kw['stdin'] = subprocess.DEVNULL
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else:
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input = input.encode(encoding)
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log.debug("run_command called: %s", cmd)
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try:
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cp = subprocess.run(cmd, input=input, stdout=stdout, stderr=stderr,
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env=_clean_env(env), **kw)
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if encoding:
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if isinstance(cp.stdout, bytes):
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cp.stdout = cp.stdout.decode(encoding)
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if isinstance(cp.stderr, bytes):
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cp.stderr = cp.stderr.decode(encoding)
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except subprocess.CalledProcessError as e:
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log.debug("run_command %s", str(e))
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raise
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else:
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log.debug("run_command %s exited with code %s", cp.args, cp.returncode)
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return cp
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def start_command(cmd, *, stdin=subprocess.DEVNULL, stdout=subprocess.PIPE,
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stderr=subprocess.PIPE, encoding='utf-8', errors='replace',
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env=None, **kw):
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"""A wrapper around subprocess.Popen with logging and different defaults.
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We never ever want a subprocess to inherit our file descriptors!
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"""
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log.debug('start_command called: %s', cmd)
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return subprocess.Popen(cmd, stdin=stdin, stdout=stdout, stderr=stderr,
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env=_clean_env(env), **kw)
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# FIXME: replace with passlib and update package deps
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def crypt_password(passwd, algo='SHA-512'):
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# encryption algo - id pairs for crypt()
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algos = {'SHA-512': '$6$', 'SHA-256': '$5$', 'MD5': '$1$', 'DES': ''}
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if algo not in algos:
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raise Exception('Invalid algo({}), must be one of: {}. '.format(
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algo, ','.join(algos.keys())))
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salt_set = ('abcdefghijklmnopqrstuvwxyz'
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'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
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'0123456789./')
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salt = 16 * ' '
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salt = ''.join([random.choice(salt_set) for c in salt])
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return crypt.crypt(passwd, algos[algo] + salt)
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def disable_console_conf():
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""" Stop console-conf service; which also restores getty service """
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log.info('disabling console-conf service')
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run_command(["systemctl", "stop", "--no-block", "console-conf@*.service",
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"serial-console-conf@*.service"])
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return
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def disable_subiquity():
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""" Stop subiquity service; which also restores getty service """
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log.info('disabling subiquity service')
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run_command(["mkdir", "-p", "/run/subiquity"])
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run_command(["touch", "/run/subiquity/complete"])
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run_command(["systemctl", "start", "--no-block", "getty@tty1.service"])
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run_command(["systemctl", "stop", "--no-block",
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"snap.subiquity.subiquity-service.service",
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"serial-subiquity@*.service"])
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return
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