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"""Debian Init Support for Bcfg2"""
import glob
import os
import re
import Bcfg2.Client.Tools
# Debian squeeze and beyond uses a dependecy based boot sequence
DEBIAN_OLD_STYLE_BOOT_SEQUENCE = ('etch', '4.0', 'lenny')
class DebInit(Bcfg2.Client.Tools.SvcTool):
"""Debian Service Support for Bcfg2."""
name = 'DebInit'
__execs__ = ['/usr/sbin/update-rc.d', '/usr/sbin/invoke-rc.d']
__handles__ = [('Service', 'deb')]
__req__ = {'Service': ['name', 'status']}
svcre = \
re.compile(r'/etc/.*/(?P<action>[SK])(?P<sequence>\d+)(?P<name>\S+)')
def get_svc_command(self, service, action):
return '/usr/sbin/invoke-rc.d %s %s' % (service.get('name'), action)
def verify_bootstatus(self, entry, bootstatus):
"""Verify bootstatus for entry."""
rawfiles = glob.glob("/etc/rc*.d/[SK]*%s" % (entry.get('name')))
files = []
try:
deb_version = open('/etc/debian_version').read().split('/', 1)[0]
except IOError:
deb_version = 'unknown'
if entry.get('sequence'):
if (deb_version in DEBIAN_OLD_STYLE_BOOT_SEQUENCE or
deb_version.startswith('5') or
os.path.exists('/etc/init.d/.legacy-bootordering')):
start_sequence = int(entry.get('sequence'))
kill_sequence = 100 - start_sequence
else:
start_sequence = None
self.logger.warning("Your debian version boot sequence is "
"dependency based \"sequence\" attribute "
"will be ignored.")
else:
start_sequence = None
for filename in rawfiles:
match = self.svcre.match(filename)
if not match:
self.logger.error("Failed to match file: %s" % filename)
continue
if match.group('name') == entry.get('name'):
files.append(filename)
if bootstatus == 'off':
if files:
entry.set('current_bootstatus', 'on')
return False
else:
return True
elif files:
if start_sequence:
for filename in files:
match = self.svcre.match(filename)
file_sequence = int(match.group('sequence'))
if ((match.group('action') == 'S' and
file_sequence != start_sequence) or
(match.group('action') == 'K' and
file_sequence != kill_sequence)):
return False
return True
else:
entry.set('current_bootstatus', 'off')
return False
def VerifyService(self, entry, _):
"""Verify Service status for entry."""
entry.set('target_status', entry.get('status')) # for reporting
bootstatus = self.get_bootstatus(entry)
if bootstatus is None:
return True
current_bootstatus = self.verify_bootstatus(entry, bootstatus)
if entry.get('status') == 'ignore':
# 'ignore' should verify
current_svcstatus = True
svcstatus = True
else:
svcstatus = self.check_service(entry)
if entry.get('status') == 'on':
if svcstatus:
current_svcstatus = True
else:
current_svcstatus = False
elif entry.get('status') == 'off':
if svcstatus:
current_svcstatus = False
else:
current_svcstatus = True
if svcstatus:
entry.set('current_status', 'on')
else:
entry.set('current_status', 'off')
return current_bootstatus and current_svcstatus
def InstallService(self, entry):
"""Install Service entry."""
self.logger.info("Installing Service %s" % (entry.get('name')))
bootstatus = self.get_bootstatus(entry)
# check if init script exists
try:
os.stat('/etc/init.d/%s' % entry.get('name'))
except OSError:
self.logger.debug("Init script for service %s does not exist" %
entry.get('name'))
return False
if bootstatus is not None:
seqcmdrv = True
if bootstatus == 'on':
# make sure service is enabled on boot
bootcmd = '/usr/sbin/update-rc.d %s defaults' % \
entry.get('name')
if entry.get('sequence'):
seqcmd = '/usr/sbin/update-rc.d -f %s remove' % \
entry.get('name')
seqcmdrv = self.cmd.run(seqcmd)
start_sequence = int(entry.get('sequence'))
kill_sequence = 100 - start_sequence
bootcmd = '%s %d %d' % (bootcmd, start_sequence,
kill_sequence)
elif bootstatus == 'off':
# make sure service is disabled on boot
bootcmd = '/usr/sbin/update-rc.d -f %s remove' % \
entry.get('name')
bootcmdrv = self.cmd.run(bootcmd)
if self.setup['servicemode'] == 'disabled':
# 'disabled' means we don't attempt to modify running svcs
return bootcmdrv and seqcmdrv
buildmode = self.setup['servicemode'] == 'build'
if (entry.get('status') == 'on' and not buildmode) and \
entry.get('current_status') == 'off':
svccmdrv = self.start_service(entry)
elif (entry.get('status') == 'off' or buildmode) and \
entry.get('current_status') == 'on':
svccmdrv = self.stop_service(entry)
else:
svccmdrv = True # ignore status attribute
return bootcmdrv and svccmdrv and seqcmdrv
else:
# when bootstatus is 'None', status == 'ignore'
return True
def FindExtra(self):
"""Find Extra Debian Service entries."""
specified = [entry.get('name') for entry in self.getSupportedEntries()]
extra = set()
for fname in glob.glob("/etc/rc[12345].d/S*"):
name = self.svcre.match(fname).group('name')
if name not in specified:
extra.add(name)
return [Bcfg2.Client.XML.Element('Service', name=name, type='deb')
for name in list(extra)]
def Remove(self, _):
"""Remove extra service entries."""
# Extra service removal is nonsensical
# Extra services need to be reflected in the config
return
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