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action_utils: Limited fallback to sysvinit

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In case of start/stop/restart/reload and to check whether service is
running, fallback to sysvinit scripts when systemd is not running.  This
happens inside a chroot environment when setup of essential components
is happening.
This commit is contained in:
Sunil Mohan Adapa 2016-05-18 11:49:33 +05:30 committed by James Valleroy
parent 401d3870f6
commit 8d9480901b
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GPG Key ID: 77C0C75E7B650808
1 changed files with 41 additions and 9 deletions
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50
plinth/action_utils.py
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@ -20,18 +20,30 @@ Python action utility functions.
"""
from django.utils.translation import ugettext as _
import os
import psutil
import socket
import subprocess
def is_systemd_running():
"""Return if we are running under systemd."""
return os.path.exists('/run/systemd')
def service_is_running(servicename):
"""Return whether a service is currently running.
Does not need to run as root.
"""
try:
subprocess.check_output(['systemctl', 'status', servicename])
if is_systemd_running():
subprocess.run(['systemctl', 'status', servicename], check=True,
stdout=subprocess.DEVNULL)
else:
subprocess.run(['service', servicename, 'status'], check=True,
stdout=subprocess.DEVNULL)
return True
except subprocess.CalledProcessError:
# If a service is not running we get a status code != 0 and
@ -64,23 +76,43 @@ def service_disable(service_name):
def service_start(service_name):
"""Start a service."""
subprocess.call(['systemctl', 'start', service_name])
"""Start a service with systemd or sysvinit."""
if is_systemd_running():
subprocess.run(['systemctl', 'start', service_name],
stdout=subprocess.DEVNULL)
else:
subprocess.run(['service', service_name, 'start'],
stdout=subprocess.DEVNULL)
def service_stop(service_name):
"""Stop a service."""
subprocess.call(['systemctl', 'stop', service_name])
"""Stop a service with systemd or sysvinit."""
if is_systemd_running():
subprocess.run(['systemctl', 'stop', service_name],
stdout=subprocess.DEVNULL)
else:
subprocess.run(['service', service_name, 'stop'],
stdout=subprocess.DEVNULL)
def service_restart(service_name):
"""Restart service with systemd."""
subprocess.call(['systemctl', 'restart', service_name])
"""Restart a service with systemd or sysvinit."""
if is_systemd_running():
subprocess.run(['systemctl', 'restart', service_name],
stdout=subprocess.DEVNULL)
else:
subprocess.run(['service', service_name, 'restart'],
stdout=subprocess.DEVNULL)
def service_reload(service_name):
"""Reload service with systemd."""
subprocess.call(['systemctl', 'reload', service_name])
"""Reload a service with systemd or sysvinit."""
if is_systemd_running():
subprocess.run(['systemctl', 'reload', service_name],
stdout=subprocess.DEVNULL)
else:
subprocess.run(['service', service_name, 'reload'],
stdout=subprocess.DEVNULL)
def webserver_is_enabled(name, kind='config'):