def _get_localzone():
pipe = subprocess.Popen(
"systemsetup -gettimezone",
shell=True,
stderr=subprocess.PIPE,
stdout=subprocess.PIPE
)
tzname = pipe.stdout.read().replace(b'Time Zone: ', b'').strip()
if not tzname or tzname not in pytz.all_timezones_set:
# link will be something like /usr/share/zoneinfo/America/Los_Angeles.
link = os.readlink("/etc/localtime")
tzname = link[link.rfind("zoneinfo/") + 9:]
return _get_timezone(tzname)
def _tz_from_env(tzenv):
if tzenv[0] == ':':
tzenv = tzenv[1:]
# TZ specifies a file
if os.path.exists(tzenv):
with open(tzenv, 'rb') as tzfile:
return pytz.tzfile.build_tzinfo('local', tzfile)
# TZ specifies a zoneinfo zone.
try:
tz = _get_timezone(tzenv)
# That worked, so we return this:
return tz
except pytz.UnknownTimeZoneError:
raise pytz.UnknownTimeZoneError(
"tzlocal() does not support non-zoneinfo timezones like %s. \n"
"Please use a timezone in the form of Continent/City")
def _tz_from_env(tzenv):
if tzenv[0] == ":":
tzenv = tzenv[1:]
# TZ specifies a file
if os.path.exists(tzenv):
with open(tzenv, "rb") as tzfile:
return pytz.tzfile.build_tzinfo("local", tzfile)
# TZ specifies a zoneinfo zone.
try:
tz = _get_timezone(tzenv)
# That worked, so we return this:
return tz
except pytz.UnknownTimeZoneError:
raise pytz.UnknownTimeZoneError(
"tzlocal() does not support non-zoneinfo timezones like %s. \n"
"Please use a timezone in the form of Continent/City"
)
def _get_localzone(_root="/"):
"""Tries to find the local timezone configuration.
This method prefers finding the timezone name and passing that to pytz,
over passing in the localtime file, as in the later case the zoneinfo
name is unknown.
The parameter _root makes the function look for files like /etc/localtime
beneath the _root directory. This is primarily used by the tests.
In normal usage you call the function without parameters."""
tzenv = os.environ.get("TZ")
if tzenv:
try:
return _tz_from_env(tzenv)
except pytz.UnknownTimeZoneError:
pass
# Use "getprop" to retrieve the android device timezone
getprop_path = os.path.join(_root, "system/bin/getprop")
if os.path.exists(getprop_path):
try:
tz_prop = subprocess.check_output([getprop_path, "persist.sys.timezone"])
if tz_prop:
return _get_timezone(tz_prop.strip())
except pytz.UnknownTimeZoneError:
pass
except subprocess.CalledProcessError:
pass
# Now look for distribution specific configuration files
# that contain the timezone name.
tzpath = os.path.join(_root, "etc/timezone")
if os.path.exists(tzpath):
with open(tzpath, "rb") as tzfile:
data = tzfile.read()
# Issue #3 was that /etc/timezone was a zoneinfo file.
# That's a misconfiguration, but we need to handle it gracefully:
if data[:5] != "TZif2":
etctz = data.strip().decode()
# Get rid of host definitions and comments:
if " " in etctz:
etctz, dummy = etctz.split(" ", 1)
if "#" in etctz:
etctz, dummy = etctz.split("#", 1)
return _get_timezone(etctz.replace(" ", "_"))
# CentOS has a ZONE setting in /etc/sysconfig/clock,
# OpenSUSE has a TIMEZONE setting in /etc/sysconfig/clock and
# Gentoo has a TIMEZONE setting in /etc/conf.d/clock
# We look through these files for a timezone:
zone_re = re.compile('\s*ZONE\s*=\s*"')
timezone_re = re.compile('\s*TIMEZONE\s*=\s*"')
end_re = re.compile('"')
for filename in ("etc/sysconfig/clock", "etc/conf.d/clock"):
tzpath = os.path.join(_root, filename)
if not os.path.exists(tzpath):
continue
with open(tzpath, "rt") as tzfile:
data = tzfile.readlines()
for line in data:
# Look for the ZONE= setting.
match = zone_re.match(line)
if match is None:
# No ZONE= setting. Look for the TIMEZONE= setting.
match = timezone_re.match(line)
if match is not None:
# Some setting existed
line = line[match.end() :]
etctz = line[: end_re.search(line).start()]
# We found a timezone
return _get_timezone(etctz.replace(" ", "_"))
# systemd distributions use symlinks that include the zone name,
# see manpage of localtime(5) and timedatectl(1)
tzpath = os.path.join(_root, "etc/localtime")
if os.path.exists(tzpath) and os.path.islink(tzpath):
tzpath = os.path.realpath(tzpath)
start = tzpath.find("/") + 1
while start is not 0:
tzpath = tzpath[start:]
try:
return _get_timezone(tzpath)
except pytz.UnknownTimeZoneError:
pass
start = tzpath.find("/") + 1
# No explicit setting existed. Use localtime
for filename in ("etc/localtime", "usr/local/etc/localtime"):
tzpath = os.path.join(_root, filename)
if not os.path.exists(tzpath):
continue
with open(tzpath, "rb") as tzfile:
return pytz.tzfile.build_tzinfo("local", tzfile)
raise pytz.UnknownTimeZoneError("Can not find any timezone configuration")
def reload_localzone():
"""Reload the cached localzone. You need to call this if the timezone has changed."""
global _cache_tz
_cache_tz = _get_timezone(get_localzone_name())
def get_localzone():
"""Returns the zoneinfo-based tzinfo object that matches the Windows-configured timezone."""
global _cache_tz
if _cache_tz is None:
_cache_tz = _get_timezone(get_localzone_name())
return _cache_tz
def _get_localzone(_root='/'):
"""Tries to find the local timezone configuration.
This method prefers finding the timezone name and passing that to pytz,
over passing in the localtime file, as in the later case the zoneinfo
name is unknown.
The parameter _root makes the function look for files like /etc/localtime
beneath the _root directory. This is primarily used by the tests.
In normal usage you call the function without parameters."""
tzenv = os.environ.get('TZ')
if tzenv:
try:
return _tz_from_env(tzenv)
except pytz.UnknownTimeZoneError:
pass
# Use "getprop" to retrieve the android device timezone
getprop_path = os.path.join(_root, 'system/bin/getprop')
if os.path.exists(getprop_path):
try:
tz_prop = subprocess.check_output(
[getprop_path, 'persist.sys.timezone'])
if tz_prop:
return _get_timezone(tz_prop.strip())
except pytz.UnknownTimeZoneError:
pass
except subprocess.CalledProcessError:
pass
# Now look for distribution specific configuration files
# that contain the timezone name.
tzpath = os.path.join(_root, 'etc/timezone')
if os.path.exists(tzpath):
with open(tzpath, 'rb') as tzfile:
data = tzfile.read()
# Issue #3 was that /etc/timezone was a zoneinfo file.
# That's a misconfiguration, but we need to handle it gracefully:
if data[:5] != 'TZif2':
etctz = data.strip().decode()
# Get rid of host definitions and comments:
if ' ' in etctz:
etctz, dummy = etctz.split(' ', 1)
if '#' in etctz:
etctz, dummy = etctz.split('#', 1)
return _get_timezone(etctz.replace(' ', '_'))
# CentOS has a ZONE setting in /etc/sysconfig/clock,
# OpenSUSE has a TIMEZONE setting in /etc/sysconfig/clock and
# Gentoo has a TIMEZONE setting in /etc/conf.d/clock
# We look through these files for a timezone:
zone_re = re.compile('\s*ZONE\s*=\s*\"')
timezone_re = re.compile('\s*TIMEZONE\s*=\s*\"')
end_re = re.compile('\"')
for filename in ('etc/sysconfig/clock', 'etc/conf.d/clock'):
tzpath = os.path.join(_root, filename)
if not os.path.exists(tzpath):
continue
with open(tzpath, 'rt') as tzfile:
data = tzfile.readlines()
for line in data:
# Look for the ZONE= setting.
match = zone_re.match(line)
if match is None:
# No ZONE= setting. Look for the TIMEZONE= setting.
match = timezone_re.match(line)
if match is not None:
# Some setting existed
line = line[match.end():]
etctz = line[:end_re.search(line).start()]
# We found a timezone
return _get_timezone(etctz.replace(' ', '_'))
# systemd distributions use symlinks that include the zone name,
# see manpage of localtime(5) and timedatectl(1)
tzpath = os.path.join(_root, 'etc/localtime')
if os.path.exists(tzpath) and os.path.islink(tzpath):
tzpath = os.path.realpath(tzpath)
start = tzpath.find("/") + 1
while start is not 0:
tzpath = tzpath[start:]
try:
return _get_timezone(tzpath)
except pytz.UnknownTimeZoneError:
pass
start = tzpath.find("/") + 1
# No explicit setting existed. Use localtime
for filename in ('etc/localtime', 'usr/local/etc/localtime'):
tzpath = os.path.join(_root, filename)
if not os.path.exists(tzpath):
continue
with open(tzpath, 'rb') as tzfile:
return pytz.tzfile.build_tzinfo('local', tzfile)
raise pytz.UnknownTimeZoneError('Can not find any timezone configuration')
def reload_localzone():
"""Reload the cached localzone. You need to call this if the timezone has changed."""
global _cache_tz
_cache_tz = _get_timezone(get_localzone_name())
def get_localzone():
"""Returns the zoneinfo-based tzinfo object that matches the Windows-configured timezone."""
global _cache_tz
if _cache_tz is None:
_cache_tz = _get_timezone(get_localzone_name())
return _cache_tz