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systemctl.py
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#! /usr/bin/python
from __future__ import print_function
__copyright__ = "(C) 2016-2019 Guido U. Draheim, licensed under the EUPL"
__version__ = "1.4.3147"
import logging
logg = logging.getLogger("systemctl")
import re
import fnmatch
import shlex
import collections
import errno
import os
import sys
import signal
import time
import socket
import datetime
import fcntl
if sys.version[0] == '2':
string_types = basestring
BlockingIOError = IOError
else:
string_types = str
xrange = range
COVERAGE = os.environ.get("SYSTEMCTL_COVERAGE", "")
DEBUG_AFTER = os.environ.get("SYSTEMCTL_DEBUG_AFTER", "") or False
EXIT_WHEN_NO_MORE_PROCS = os.environ.get("SYSTEMCTL_EXIT_WHEN_NO_MORE_PROCS", "") or False
EXIT_WHEN_NO_MORE_SERVICES = os.environ.get("SYSTEMCTL_EXIT_WHEN_NO_MORE_SERVICES", "") or False
# defaults for options
_extra_vars = []
_force = False
_full = False
_now = False
_no_legend = False
_no_ask_password = False
_preset_mode = "all"
_quiet = False
_root = ""
_unit_type = None
_unit_state = None
_unit_property = None
_show_all = False
_user_mode = False
# common default paths
_default_target = "multi-user.target"
_system_folder1 = "/etc/systemd/system"
_system_folder2 = "/var/run/systemd/system"
_system_folder3 = "/usr/lib/systemd/system"
_system_folder4 = "/lib/systemd/system"
_system_folder9 = None
_user_folder1 = "~/.config/systemd/user"
_user_folder2 = "/etc/systemd/user"
_user_folder3 = "~.local/share/systemd/user"
_user_folder4 = "/usr/lib/systemd/user"
_user_folder9 = None
_init_folder1 = "/etc/init.d"
_init_folder2 = "/var/run/init.d"
_init_folder9 = None
_preset_folder1 = "/etc/systemd/system-preset"
_preset_folder2 = "/var/run/systemd/system-preset"
_preset_folder3 = "/usr/lib/systemd/system-preset"
_preset_folder4 = "/lib/systemd/system-preset"
_preset_folder9 = None
SystemCompatibilityVersion = 219
EpsilonTime = 0.1
MinimumYield = 0.5
MinimumTimeoutStartSec = 4
MinimumTimeoutStopSec = 4
DefaultTimeoutStartSec = int(os.environ.get("SYSTEMCTL_TIMEOUT_START_SEC", 90)) # official value
DefaultTimeoutStopSec = int(os.environ.get("SYSTEMCTL_TIMEOUT_STOP_SEC", 90)) # official value
DefaultMaximumTimeout = int(os.environ.get("SYSTEMCTL_MAXIMUM_TIMEOUT", 200)) # overrides all other
InitLoopSleep = int(os.environ.get("SYSTEMCTL_INITLOOP", 5))
ProcMaxDepth = 100
MaxLockWait = None # equals DefaultMaximumTimeout
DefaultPath = "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
ResetLocale = ["LANG", "LANGUAGE", "LC_CTYPE", "LC_NUMERIC", "LC_TIME", "LC_COLLATE", "LC_MONETARY",
"LC_MESSAGES", "LC_PAPER", "LC_NAME", "LC_ADDRESS", "LC_TELEPHONE", "LC_MEASUREMENT",
"LC_IDENTIFICATION", "LC_ALL"]
# The systemd default is NOTIFY_SOCKET="/var/run/systemd/notify"
_notify_socket_folder = "/var/run/systemd" # alias /run/systemd
_pid_file_folder = "/var/run"
_journal_log_folder = "/var/log/journal"
_systemctl_debug_log = "/var/log/systemctl.debug.log"
_systemctl_extra_log = "/var/log/systemctl.log"
_default_targets = [ "poweroff.target", "rescue.target", "sysinit.target", "basic.target", "multi-user.target", "graphical.target", "reboot.target" ]
_feature_targets = [ "network.target", "remote-fs.target", "local-fs.target", "timers.target", "nfs-client.target" ]
_all_common_targets = [ "default.target" ] + _default_targets + _feature_targets
# inside a docker we pretend the following
_all_common_enabled = [ "default.target", "multi-user.target", "remote-fs.target" ]
_all_common_disabled = [ "graphical.target", "resue.target", "nfs-client.target" ]
_runlevel_mappings = {} # the official list
_runlevel_mappings["0"] = "poweroff.target"
_runlevel_mappings["1"] = "rescue.target"
_runlevel_mappings["2"] = "multi-user.target"
_runlevel_mappings["3"] = "multi-user.target"
_runlevel_mappings["4"] = "multi-user.target"
_runlevel_mappings["5"] = "graphical.target"
_runlevel_mappings["6"] = "reboot.target"
_sysv_mappings = {} # by rule of thumb
_sysv_mappings["$local_fs"] = "local-fs.target"
_sysv_mappings["$network"] = "network.target"
_sysv_mappings["$remote_fs"] = "remote-fs.target"
_sysv_mappings["$timer"] = "timers.target"
def shell_cmd(cmd):
return " ".join(["'%s'" % part for part in cmd])
def to_int(value, default = 0):
try:
return int(value)
except:
return default
def to_list(value):
if isinstance(value, string_types):
return [ value ]
return value
def unit_of(module):
if "." not in module:
return module + ".service"
return module
def os_path(root, path):
if not root:
return path
if not path:
return path
while path.startswith(os.path.sep):
path = path[1:]
return os.path.join(root, path)
def os_getlogin():
""" NOT using os.getlogin() """
import pwd
return pwd.getpwuid(os.geteuid()).pw_name
def get_runtime_dir():
explicit = os.environ.get("XDG_RUNTIME_DIR", "")
if explicit: return explicit
user = os_getlogin()
return "/tmp/run-"+user
def get_home():
explicit = os.environ.get("HOME", "")
if explicit: return explicit
return os.path.expanduser("~")
def _var(path):
""" assumes that the path starts with /var - and when
in --user mode it is moved to /run/user/1001/run/
or as a fallback path to /tmp/run-{user}/ so that
you may find /var/log in /tmp/run-{user}/log .."""
if not _user_mode:
return path
if path.startswith("/var"):
runtime = get_runtime_dir() # $XDG_RUNTIME_DIR
if not os.path.isdir(runtime):
os.makedirs(runtime)
os.chmod(runtime, 0o700)
return re.sub("^(/var)?", get_runtime_dir(), path)
return path
def shutil_setuid(user = None, group = None):
""" set fork-child uid/gid (returns pw-info env-settings)"""
if group:
import grp
gid = grp.getgrnam(group).gr_gid
os.setgid(gid)
logg.debug("setgid %s '%s'", gid, group)
if user:
import pwd
pw = pwd.getpwnam(user)
if not group:
gid = pw.pw_gid
os.setgid(gid)
logg.debug("setgid %s", gid)
uid = pw.pw_uid
os.setuid(uid)
logg.debug("setuid %s '%s'", uid, user)
home = pw.pw_dir
shell = pw.pw_shell
logname = pw.pw_name
return { "USER": user, "LOGNAME": logname, "HOME": home, "SHELL": shell }
return {}
def shutil_truncate(filename):
""" truncates the file (or creates a new empty file)"""
filedir = os.path.dirname(filename)
if not os.path.isdir(filedir):
os.makedirs(filedir)
f = open(filename, "w")
f.write("")
f.close()
# http://stackoverflow.com/questions/568271/how-to-check-if-there-exists-a-process-with-a-given-pid
def pid_exists(pid):
"""Check whether pid exists in the current process table."""
if pid is None:
return False
return _pid_exists(int(pid))
def _pid_exists(pid):
"""Check whether pid exists in the current process table.
UNIX only.
"""
if pid < 0:
return False
if pid == 0:
# According to "man 2 kill" PID 0 refers to every process
# in the process group of the calling process.
# On certain systems 0 is a valid PID but we have no way
# to know that in a portable fashion.
raise ValueError('invalid PID 0')
try:
os.kill(pid, 0)
except OSError as err:
if err.errno == errno.ESRCH:
# ESRCH == No such process
return False
elif err.errno == errno.EPERM:
# EPERM clearly means there's a process to deny access to
return True
else:
# According to "man 2 kill" possible error values are
# (EINVAL, EPERM, ESRCH)
raise
else:
return True
def pid_zombie(pid):
""" may be a pid exists but it is only a zombie """
if pid is None:
return False
return _pid_zombie(int(pid))
def _pid_zombie(pid):
""" may be a pid exists but it is only a zombie """
if pid < 0:
return False
if pid == 0:
# According to "man 2 kill" PID 0 refers to every process
# in the process group of the calling process.
# On certain systems 0 is a valid PID but we have no way
# to know that in a portable fashion.
raise ValueError('invalid PID 0')
check = "/proc/%s/status" % pid
try:
for line in open(check):
if line.startswith("State:"):
return "Z" in line
except IOError as e:
if e.errno != errno.ENOENT:
logg.error("%s (%s): %s", check, e.errno, e)
return False
return False
def checkstatus(cmd):
if cmd.startswith("-"):
return False, cmd[1:]
else:
return True, cmd
# https://github.com/phusion/baseimage-docker/blob/rel-0.9.16/image/bin/my_init
def ignore_signals_and_raise_keyboard_interrupt(signame):
signal.signal(signal.SIGTERM, signal.SIG_IGN)
signal.signal(signal.SIGINT, signal.SIG_IGN)
raise KeyboardInterrupt(signame)
class SystemctlConfigParser:
""" A *.service files has a structure similar to an *.ini file but it is
actually not like it. Settings may occur multiple times in each section
and they create an implicit list. In reality all the settings are
globally uniqute, so that an 'environment' can be printed without
adding prefixes. Settings are continued with a backslash at the end
of the line. """
def __init__(self, defaults=None, dict_type=None, allow_no_value=False):
self._defaults = defaults or {}
self._dict_type = dict_type or collections.OrderedDict
self._allow_no_value = allow_no_value
self._conf = self._dict_type()
self._files = []
def defaults(self):
return self._defaults
def sections(self):
return list(self._conf.keys())
def add_section(self, section):
if section not in self._conf:
self._conf[section] = self._dict_type()
def has_section(self, section):
return section in self._conf
def has_option(self, section, option):
if section not in self._conf:
return False
return option in self._conf[section]
def set(self, section, option, value):
if section not in self._conf:
self._conf[section] = self._dict_type()
if option not in self._conf[section]:
self._conf[section][option] = [ value ]
else:
self._conf[section][option].append(value)
if value is None:
self._conf[section][option] = []
def get(self, section, option, default = None, allow_no_value = False):
allow_no_value = allow_no_value or self._allow_no_value
if section not in self._conf:
if default is not None:
return default
if allow_no_value:
return None
logg.warning("section {} does not exist".format(section))
logg.warning(" have {}".format(self.sections()))
raise AttributeError("section {} does not exist".format(section))
if option not in self._conf[section]:
if default is not None:
return default
if allow_no_value:
return None
raise AttributeError("option {} in {} does not exist".format(option, section))
if not self._conf[section][option]: # i.e. an empty list
if default is not None:
return default
if allow_no_value:
return None
raise AttributeError("option {} in {} is None".format(option, section))
return self._conf[section][option][0] # the first line in the list of configs
def getlist(self, section, option, default = None, allow_no_value = False):
allow_no_value = allow_no_value or self._allow_no_value
if section not in self._conf:
if default is not None:
return default
if allow_no_value:
return []
logg.warning("section {} does not exist".format(section))
logg.warning(" have {}".format(self.sections()))
raise AttributeError("section {} does not exist".format(section))
if option not in self._conf[section]:
if default is not None:
return default
if allow_no_value:
return []
raise AttributeError("option {} in {} does not exist".format(option, section))
return self._conf[section][option] # returns a list, possibly empty
def read(self, filename):
return self.read_sysd(filename)
def read_sysd(self, filename):
initscript = False
initinfo = False
section = None
nextline = False
name, text = "", ""
if os.path.isfile(filename):
self._files.append(filename)
for orig_line in open(filename):
if nextline:
text += orig_line
if text.rstrip().endswith("\\") or text.rstrip().endswith("\\\n"):
text = text.rstrip() + "\n"
else:
self.set(section, name, text)
nextline = False
continue
line = orig_line.strip()
if not line:
continue
if line.startswith("#"):
continue
if line.startswith(";"):
continue
if line.startswith(".include"):
logg.error("the '.include' syntax is deprecated. Use x.service.d/ drop-in files!")
includefile = re.sub(r'^\.include[ ]*', '', line).rstrip()
if not os.path.isfile(includefile):
raise Exception("tried to include file that doesn't exist: %s" % includefile)
self.read_sysd(includefile)
continue
if line.startswith("["):
x = line.find("]")
if x > 0:
section = line[1:x]
self.add_section(section)
continue
m = re.match(r"(\w+) *=(.*)", line)
if not m:
logg.warning("bad ini line: %s", line)
raise Exception("bad ini line")
name, text = m.group(1), m.group(2).strip()
if text.endswith("\\") or text.endswith("\\\n"):
nextline = True
text = text + "\n"
else:
# hint: an empty line shall reset the value-list
self.set(section, name, text and text or None)
def read_sysv(self, filename):
""" an LSB header is scanned and converted to (almost)
equivalent settings of a SystemD ini-style input """
initscript = False
initinfo = False
section = None
if os.path.isfile(filename):
self._files.append(filename)
for orig_line in open(filename):
line = orig_line.strip()
if line.startswith("#"):
if " BEGIN INIT INFO" in line:
initinfo = True
section = "init.d"
if " END INIT INFO" in line:
initinfo = False
if initinfo:
m = re.match(r"\S+\s*(\w[\w_-]*):(.*)", line)
if m:
key, val = m.group(1), m.group(2).strip()
self.set(section, key, val)
continue
description = self.get("init.d", "Description", "")
if description:
self.set("Unit", "Description", description)
check = self.get("init.d", "Required-Start","")
if check:
for item in check.split(" "):
if item.strip() in _sysv_mappings:
self.set("Unit", "Requires", _sysv_mappings[item.strip()])
provides = self.get("init.d", "Provides", "")
if provides:
self.set("Install", "Alias", provides)
# if already in multi-user.target then start it there.
runlevels = self.get("init.d", "Default-Start","")
if runlevels:
for item in runlevels.split(" "):
if item.strip() in _runlevel_mappings:
self.set("Install", "WantedBy", _runlevel_mappings[item.strip()])
self.set("Service", "Type", "sysv")
def filenames(self):
return self._files
# UnitConfParser = ConfigParser.RawConfigParser
UnitConfParser = SystemctlConfigParser
class SystemctlConf:
def __init__(self, data, module = None):
self.data = data # UnitConfParser
self.env = {}
self.status = None
self.masked = None
self.module = module
self.drop_in_files = {}
def loaded(self):
files = self.data.filenames()
if self.masked:
return "masked"
if len(files):
return "loaded"
return ""
def filename(self):
""" returns the last filename that was parsed """
files = self.data.filenames()
if files:
return files[0]
return None
def overrides(self):
""" drop-in files are loaded alphabetically by name, not by full path """
return [ self.drop_in_files[name] for name in sorted(self.drop_in_files) ]
def name(self):
""" the unit id or defaults to the file name """
name = self.module or ""
filename = self.filename()
if filename:
name = os.path.basename(filename)
return self.get("Unit", "Id", name)
def set(self, section, name, value):
return self.data.set(section, name, value)
def get(self, section, name, default, allow_no_value = False):
return self.data.get(section, name, default, allow_no_value)
def getlist(self, section, name, default = None, allow_no_value = False):
return self.data.getlist(section, name, default or [], allow_no_value)
def getbool(self, section, name, default = None):
value = self.data.get(section, name, default or "no")
if value:
if value[0] in "TtYy123456789":
return True
return False
class PresetFile:
def __init__(self):
self._files = []
self._lines = []
def filename(self):
""" returns the last filename that was parsed """
if self._files:
return self._files[-1]
return None
def read(self, filename):
self._files.append(filename)
for line in open(filename):
self._lines.append(line.strip())
return self
def get_preset(self, unit):
for line in self._lines:
m = re.match(r"(enable|disable)\s+(\S+)", line)
if m:
status, pattern = m.group(1), m.group(2)
if fnmatch.fnmatchcase(unit, pattern):
logg.debug("%s %s => %s [%s]", status, pattern, unit, self.filename())
return status
return None
## with waitlock(conf): self.start()
class waitlock:
def __init__(self, conf):
self.conf = conf # currently unused
self.opened = None
self.lockfolder = os_path(_root, _var(_notify_socket_folder))
try:
folder = self.lockfolder
if not os.path.isdir(folder):
os.makedirs(folder)
except Exception as e:
logg.warning("oops, %s", e)
def lockfile(self):
unit = ""
if self.conf:
unit = self.conf.name()
return os.path.join(self.lockfolder, str(unit or "global") + ".lock")
def __enter__(self):
try:
lockfile = self.lockfile()
lockname = os.path.basename(lockfile)
self.opened = os.open(lockfile, os.O_RDWR | os.O_CREAT, 0o600)
for attempt in xrange(int(MaxLockWait or DefaultMaximumTimeout)):
try:
logg.debug("[%s] %s. trying %s _______ ", os.getpid(), attempt, lockname)
fcntl.flock(self.opened, fcntl.LOCK_EX | fcntl.LOCK_NB)
st = os.fstat(self.opened)
if not st.st_nlink:
logg.debug("[%s] %s. %s got deleted, trying again", os.getpid(), attempt, lockname)
os.close(self.opened)
self.opened = os.open(lockfile, os.O_RDWR | os.O_CREAT, 0o600)
continue
content = "{ 'systemctl': %s, 'lock': '%s' }\n" % (os.getpid(), lockname)
os.write(self.opened, content.encode("utf-8"))
logg.debug("[%s] %s. holding lock on %s", os.getpid(), attempt, lockname)
return True
except BlockingIOError as e:
whom = os.read(self.opened, 4096)
os.lseek(self.opened, 0, os.SEEK_SET)
logg.info("[%s] %s. systemctl locked by %s", os.getpid(), attempt, whom.rstrip())
time.sleep(1) # until MaxLockWait
continue
logg.error("[%s] not able to get the lock to %s", os.getpid(), lockname)
except Exception as e:
logg.warning("[%s] oops %s, %s", os.getpid(), str(type(e)), e)
#TODO# raise Exception("no lock for %s", self.unit or "global")
return False
def __exit__(self, type, value, traceback):
try:
os.lseek(self.opened, 0, os.SEEK_SET)
os.ftruncate(self.opened, 0)
if "removelockfile" in COVERAGE: # actually an optional implementation
lockfile = self.lockfile()
lockname = os.path.basename(lockfile)
os.unlink(lockfile) # ino is kept allocated because opened by this process
logg.debug("[%s] lockfile removed for %s", os.getpid(), lockname)
fcntl.flock(self.opened, fcntl.LOCK_UN)
os.close(self.opened) # implies an unlock but that has happend like 6 seconds later
self.opened = None
except Exception as e:
logg.warning("oops, %s", e)
def must_have_failed(waitpid, cmd):
# found to be needed on ubuntu:16.04 to match test result from ubuntu:18.04 and other distros
# .... I have tracked it down that python's os.waitpid() returns an exitcode==0 even when the
# .... underlying process has actually failed with an exitcode<>0. It is unknown where that
# .... bug comes from but it seems a bit serious to trash some very basic unix functionality.
# .... Essentially a parent process does not get the correct exitcode from its own children.
if cmd and cmd[0] == "/bin/kill":
pid = None
for arg in cmd[1:]:
if not arg.startswith("-"):
pid = arg
if pid is None: # unknown $MAINPID
if not waitpid.returncode:
logg.error("waitpid %s did return %s => correcting as 11", cmd, waitpid.returncode)
waitpidNEW = collections.namedtuple("waitpidNEW", ["pid", "returncode", "signal" ])
waitpid = waitpidNEW(waitpid.pid, 11, waitpid.signal)
return waitpid
def subprocess_waitpid(pid):
waitpid = collections.namedtuple("waitpid", ["pid", "returncode", "signal" ])
run_pid, run_stat = os.waitpid(pid, 0)
return waitpid(run_pid, os.WEXITSTATUS(run_stat), os.WTERMSIG(run_stat))
def subprocess_testpid(pid):
testpid = collections.namedtuple("testpid", ["pid", "returncode", "signal" ])
run_pid, run_stat = os.waitpid(pid, os.WNOHANG)
if run_pid:
return testpid(run_pid, os.WEXITSTATUS(run_stat), os.WTERMSIG(run_stat))
else:
return testpid(pid, None, 0)
def parse_unit(name): # -> object(prefix, instance, suffix, ...., name, component)
unit_name, suffix = name, ""
has_suffix = name.rfind(".")
if has_suffix > 0:
unit_name = name[:has_suffix]
suffix = name[has_suffix+1:]
prefix, instance = unit_name, ""
has_instance = unit_name.find("@")
if has_instance > 0:
prefix = unit_name[:has_instance]
instance = unit_name[has_instance+1:]
component = ""
has_component = prefix.rfind("-")
if has_component > 0:
component = prefix[has_component+1:]
UnitName = collections.namedtuple("UnitName", ["name", "prefix", "instance", "suffix", "component" ])
return UnitName(name, prefix, instance, suffix, component)
def time_to_seconds(text, maximum = None):
if maximum is None:
maximum = DefaultMaximumTimeout
value = 0
for part in str(text).split(" "):
item = part.strip()
if item == "infinity":
return maximum
if item.endswith("m"):
try: value += 60 * int(item[:-1])
except: pass # pragma: no cover
if item.endswith("min"):
try: value += 60 * int(item[:-3])
except: pass # pragma: no cover
elif item.endswith("ms"):
try: value += int(item[:-2]) / 1000.
except: pass # pragma: no cover
elif item.endswith("s"):
try: value += int(item[:-1])
except: pass # pragma: no cover
elif item:
try: value += int(item)
except: pass # pragma: no cover
if value > maximum:
return maximum
if not value:
return 1
return value
def seconds_to_time(seconds):
seconds = float(seconds)
mins = int(int(seconds) / 60)
secs = int(int(seconds) - (mins * 60))
msecs = int(int(seconds * 1000) - (secs * 1000 + mins * 60000))
if mins and secs and msecs:
return "%smin %ss %sms" % (mins, secs, msecs)
elif mins and secs:
return "%smin %ss" % (mins, secs)
elif secs and msecs:
return "%ss %sms" % (secs, msecs)
elif mins and msecs:
return "%smin %sms" % (mins, msecs)
elif mins:
return "%smin" % (mins)
else:
return "%ss" % (secs)
def getBefore(conf):
result = []
beforelist = conf.getlist("Unit", "Before", [])
for befores in beforelist:
for before in befores.split(" "):
name = before.strip()
if name and name not in result:
result.append(name)
return result
def getAfter(conf):
result = []
afterlist = conf.getlist("Unit", "After", [])
for afters in afterlist:
for after in afters.split(" "):
name = after.strip()
if name and name not in result:
result.append(name)
return result
def compareAfter(confA, confB):
idA = confA.name()
idB = confB.name()
for after in getAfter(confA):
if after == idB:
logg.debug("%s After %s", idA, idB)
return -1
for after in getAfter(confB):
if after == idA:
logg.debug("%s After %s", idB, idA)
return 1
for before in getBefore(confA):
if before == idB:
logg.debug("%s Before %s", idA, idB)
return 1
for before in getBefore(confB):
if before == idA:
logg.debug("%s Before %s", idB, idA)
return -1
return 0
def sortedAfter(conflist, cmp = compareAfter):
# the normal sorted() does only look at two items
# so if "A after C" and a list [A, B, C] then
# it will see "A = B" and "B = C" assuming that
# "A = C" and the list is already sorted.
#
# To make a totalsorted we have to create a marker
# that informs sorted() that also B has a relation.
# It only works when 'after' has a direction, so
# anything without 'before' is a 'after'. In that
# case we find that "B after C".
class SortTuple:
def __init__(self, rank, conf):
self.rank = rank
self.conf = conf
sortlist = [ SortTuple(0, conf) for conf in conflist]
for check in xrange(len(sortlist)): # maxrank = len(sortlist)
changed = 0
for A in xrange(len(sortlist)):
for B in xrange(len(sortlist)):
if A != B:
itemA = sortlist[A]
itemB = sortlist[B]
before = compareAfter(itemA.conf, itemB.conf)
if before > 0 and itemA.rank <= itemB.rank:
if DEBUG_AFTER: # pragma: no cover
logg.info(" %-30s before %s", itemA.conf.name(), itemB.conf.name())
itemA.rank = itemB.rank + 1
changed += 1
if before < 0 and itemB.rank <= itemA.rank:
if DEBUG_AFTER: # pragma: no cover
logg.info(" %-30s before %s", itemB.conf.name(), itemA.conf.name())
itemB.rank = itemA.rank + 1
changed += 1
if not changed:
if DEBUG_AFTER: # pragma: no cover
logg.info("done in check %s of %s", check, len(sortlist))
break
# because Requires is almost always the same as the After clauses
# we are mostly done in round 1 as the list is in required order
for conf in conflist:
if DEBUG_AFTER: # pragma: no cover
logg.debug(".. %s", conf.name())
for item in sortlist:
if DEBUG_AFTER: # pragma: no cover
logg.info("(%s) %s", item.rank, item.conf.name())
sortedlist = sorted(sortlist, key = lambda item: -item.rank)
for item in sortedlist:
if DEBUG_AFTER: # pragma: no cover
logg.info("[%s] %s", item.rank, item.conf.name())
return [ item.conf for item in sortedlist ]
class Systemctl:
def __init__(self):
# from command line options or the defaults
self._extra_vars = _extra_vars
self._force = _force
self._full = _full
self._init = _init
self._no_ask_password = _no_ask_password
self._no_legend = _no_legend
self._now = _now
self._preset_mode = _preset_mode
self._quiet = _quiet
self._root = _root
self._show_all = _show_all
self._unit_property = _unit_property
self._unit_state = _unit_state
self._unit_type = _unit_type
# some common constants that may be changed
self._systemd_version = SystemCompatibilityVersion
self._pid_file_folder = _pid_file_folder
self._journal_log_folder = _journal_log_folder
# and the actual internal runtime state
self._loaded_file_sysv = {} # /etc/init.d/name => config data
self._loaded_file_sysd = {} # /etc/systemd/system/name.service => config data
self._file_for_unit_sysv = None # name.service => /etc/init.d/name
self._file_for_unit_sysd = None # name.service => /etc/systemd/system/name.service
self._preset_file_list = None # /etc/systemd/system-preset/* => file content
self._default_target = _default_target
self.exit_when_no_more_procs = EXIT_WHEN_NO_MORE_PROCS or False
self.exit_when_no_more_services = EXIT_WHEN_NO_MORE_SERVICES or False
self._user_mode = _user_mode
self._user_getlogin = os_getlogin()
self._log_file = {} # init-loop
self._log_hold = {} # init-loop
def user(self):
return self._user_getlogin
def user_mode(self):
return self._user_mode
def user_folder(self):
for folder in self.user_folders():
if folder: return folder
raise Exception("did not find any systemd/user folder")
def system_folder(self):
for folder in self.system_folders():
if folder: return folder
raise Exception("did not find any systemd/system folder")
def init_folders(self):
if _init_folder1: yield _init_folder1
if _init_folder2: yield _init_folder2
if _init_folder9: yield _init_folder9
def preset_folders(self):
if _preset_folder1: yield _preset_folder1
if _preset_folder2: yield _preset_folder2
if _preset_folder3: yield _preset_folder3
if _preset_folder4: yield _preset_folder4
if _preset_folder9: yield _preset_folder9
def user_folders(self):
if _user_folder1: yield os.path.expanduser(_user_folder1)
if _user_folder2: yield os.path.expanduser(_user_folder2)
if _user_folder3: yield os.path.expanduser(_user_folder3)
if _user_folder4: yield os.path.expanduser(_user_folder4)
if _user_folder9: yield os.path.expanduser(_user_folder9)
def system_folders(self):
if _system_folder1: yield _system_folder1
if _system_folder2: yield _system_folder2
if _system_folder3: yield _system_folder3
if _system_folder4: yield _system_folder4
if _system_folder9: yield _system_folder9
def sysd_folders(self):
""" if --user then these folders are preferred """
if self.user_mode():
for folder in self.user_folders():
yield folder
if True:
for folder in self.system_folders():
yield folder
def scan_unit_sysd_files(self, module = None): # -> [ unit-names,... ]
""" reads all unit files, returns the first filename for the unit given """
if self._file_for_unit_sysd is None:
self._file_for_unit_sysd = {}
for folder in self.sysd_folders():
if not folder:
continue
if self._root:
folder = os_path(self._root, folder)
if not os.path.isdir(folder):
continue
for name in os.listdir(folder):
path = os.path.join(folder, name)
if os.path.isdir(path):
continue
service_name = name
if service_name not in self._file_for_unit_sysd:
self._file_for_unit_sysd[service_name] = path
logg.debug("found %s sysd files", len(self._file_for_unit_sysd))
return list(self._file_for_unit_sysd.keys())
def scan_unit_sysv_files(self, module = None): # -> [ unit-names,... ]
""" reads all init.d files, returns the first filename when unit is a '.service' """
if self._file_for_unit_sysv is None:
self._file_for_unit_sysv = {}
for folder in self.init_folders():
if not folder:
continue
if self._root:
folder = os_path(self._root, folder)
if not os.path.isdir(folder):
continue
for name in os.listdir(folder):
path = os.path.join(folder, name)
if os.path.isdir(path):
continue
service_name = name + ".service" # simulate systemd
if service_name not in self._file_for_unit_sysv:
self._file_for_unit_sysv[service_name] = path
logg.debug("found %s sysv files", len(self._file_for_unit_sysv))
return list(self._file_for_unit_sysv.keys())
def unit_sysd_file(self, module = None): # -> filename?
""" file path for the given module (systemd) """
self.scan_unit_sysd_files()
if module and module in self._file_for_unit_sysd:
return self._file_for_unit_sysd[module]
if module and unit_of(module) in self._file_for_unit_sysd:
return self._file_for_unit_sysd[unit_of(module)]
return None
def unit_sysv_file(self, module = None): # -> filename?
""" file path for the given module (sysv) """
self.scan_unit_sysv_files()
if module and module in self._file_for_unit_sysv:
return self._file_for_unit_sysv[module]
if module and unit_of(module) in self._file_for_unit_sysv:
return self._file_for_unit_sysv[unit_of(module)]
return None
def unit_file(self, module = None): # -> filename?
""" file path for the given module (sysv or systemd) """
path = self.unit_sysd_file(module)
if path is not None: return path
path = self.unit_sysv_file(module)
if path is not None: return path
return None
def is_sysv_file(self, filename):
""" for routines that have a special treatment for init.d services """
self.unit_file() # scan all
if not filename: return None
if filename in self._file_for_unit_sysd.values(): return False
if filename in self._file_for_unit_sysv.values(): return True
return None # not True
def is_user_conf(self, conf):
if not conf:
return False # no such conf >> ignored
filename = conf.filename()
if filename and "/user/" in filename:
return True
return False
def not_user_conf(self, conf):
""" conf can not be started as user service (when --user)"""
if not conf:
return True # no such conf >> ignored
if not self.user_mode():
logg.debug("%s no --user mode >> accept", conf.filename())
return False
if self.is_user_conf(conf):
logg.debug("%s is /user/ conf >> accept", conf.filename())
return False
# to allow for 'docker run -u user' with system services
user = self.expand_special(conf.get("Service", "User", ""), conf)
if user and user == self.user():
logg.debug("%s with User=%s >> accept", conf.filename(), user)
return False
return True
def find_drop_in_files(self, unit):
""" search for some.service.d/extra.conf files """
result = {}
basename_d = unit + ".d"
for folder in self.sysd_folders():
if not folder:
continue
if self._root:
folder = os_path(self._root, folder)
override_d = os_path(folder, basename_d)
if not os.path.isdir(override_d):
continue
for name in os.listdir(override_d):
path = os.path.join(override_d, name)
if os.path.isdir(path):
continue
if not path.endswith(".conf"):
continue
if name not in result:
result[name] = path
return result
def load_sysd_unit_conf(self, module): # -> conf?
""" read the unit file with a UnitConfParser (systemd) """
path = self.unit_sysd_file(module)
if not path: return None
if path in self._loaded_file_sysd:
return self._loaded_file_sysd[path]
masked = None
if os.path.islink(path) and os.readlink(path).startswith("/dev"):
masked = os.readlink(path)
drop_in_files = {}
data = UnitConfParser()
if not masked:
data.read_sysd(path)
drop_in_files = self.find_drop_in_files(os.path.basename(path))
# load in alphabetic order, irrespective of location
for name in sorted(drop_in_files):
path = drop_in_files[name]
data.read_sysd(path)
conf = SystemctlConf(data, module)
conf.masked = masked
conf.drop_in_files = drop_in_files
self._loaded_file_sysd[path] = conf
return conf
def load_sysv_unit_conf(self, module): # -> conf?
""" read the unit file with a UnitConfParser (sysv) """
path = self.unit_sysv_file(module)
if not path: return None
if path in self._loaded_file_sysv:
return self._loaded_file_sysv[path]
data = UnitConfParser()
data.read_sysv(path)
conf = SystemctlConf(data, module)
self._loaded_file_sysv[path] = conf
return conf
def load_unit_conf(self, module): # -> conf | None(not-found)
""" read the unit file with a UnitConfParser (sysv or systemd) """
try:
conf = self.load_sysd_unit_conf(module)
if conf is not None:
return conf
conf = self.load_sysv_unit_conf(module)
if conf is not None:
return conf
except Exception as e: