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platform.py
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#!/usr/bin/env python3
""" This module tries to retrieve as much platform-identifying data as
possible. It makes this information available via function APIs.
If called from the command line, it prints the platform
information concatenated as single string to stdout. The output
format is usable as part of a filename.
"""
# This module is maintained by Marc-Andre Lemburg <mal@egenix.com>.
# If you find problems, please submit bug reports/patches via the
# Python issue tracker (https://github.com/python/cpython/issues) and
# mention "@malemburg".
#
# Still needed:
# * support for MS-DOS (PythonDX ?)
# * support for Amiga and other still unsupported platforms running Python
# * support for additional Linux distributions
#
# Many thanks to all those who helped adding platform-specific
# checks (in no particular order):
#
# Charles G Waldman, David Arnold, Gordon McMillan, Ben Darnell,
# Jeff Bauer, Cliff Crawford, Ivan Van Laningham, Josef
# Betancourt, Randall Hopper, Karl Putland, John Farrell, Greg
# Andruk, Just van Rossum, Thomas Heller, Mark R. Levinson, Mark
# Hammond, Bill Tutt, Hans Nowak, Uwe Zessin (OpenVMS support),
# Colin Kong, Trent Mick, Guido van Rossum, Anthony Baxter, Steve
# Dower
#
# History:
#
# <see CVS and SVN checkin messages for history>
#
# 1.0.8 - changed Windows support to read version from kernel32.dll
# 1.0.7 - added DEV_NULL
# 1.0.6 - added linux_distribution()
# 1.0.5 - fixed Java support to allow running the module on Jython
# 1.0.4 - added IronPython support
# 1.0.3 - added normalization of Windows system name
# 1.0.2 - added more Windows support
# 1.0.1 - reformatted to make doc.py happy
# 1.0.0 - reformatted a bit and checked into Python CVS
# 0.8.0 - added sys.version parser and various new access
# APIs (python_version(), python_compiler(), etc.)
# 0.7.2 - fixed architecture() to use sizeof(pointer) where available
# 0.7.1 - added support for Caldera OpenLinux
# 0.7.0 - some fixes for WinCE; untabified the source file
# 0.6.2 - support for OpenVMS - requires version 1.5.2-V006 or higher and
# vms_lib.getsyi() configured
# 0.6.1 - added code to prevent 'uname -p' on platforms which are
# known not to support it
# 0.6.0 - fixed win32_ver() to hopefully work on Win95,98,NT and Win2k;
# did some cleanup of the interfaces - some APIs have changed
# 0.5.5 - fixed another type in the MacOS code... should have
# used more coffee today ;-)
# 0.5.4 - fixed a few typos in the MacOS code
# 0.5.3 - added experimental MacOS support; added better popen()
# workarounds in _syscmd_ver() -- still not 100% elegant
# though
# 0.5.2 - fixed uname() to return '' instead of 'unknown' in all
# return values (the system uname command tends to return
# 'unknown' instead of just leaving the field empty)
# 0.5.1 - included code for slackware dist; added exception handlers
# to cover up situations where platforms don't have os.popen
# (e.g. Mac) or fail on socket.gethostname(); fixed libc
# detection RE
# 0.5.0 - changed the API names referring to system commands to *syscmd*;
# added java_ver(); made syscmd_ver() a private
# API (was system_ver() in previous versions) -- use uname()
# instead; extended the win32_ver() to also return processor
# type information
# 0.4.0 - added win32_ver() and modified the platform() output for WinXX
# 0.3.4 - fixed a bug in _follow_symlinks()
# 0.3.3 - fixed popen() and "file" command invocation bugs
# 0.3.2 - added architecture() API and support for it in platform()
# 0.3.1 - fixed syscmd_ver() RE to support Windows NT
# 0.3.0 - added system alias support
# 0.2.3 - removed 'wince' again... oh well.
# 0.2.2 - added 'wince' to syscmd_ver() supported platforms
# 0.2.1 - added cache logic and changed the platform string format
# 0.2.0 - changed the API to use functions instead of module globals
# since some action take too long to be run on module import
# 0.1.0 - first release
#
# You can always get the latest version of this module at:
#
# http://www.egenix.com/files/python/platform.py
#
# If that URL should fail, try contacting the author.
__copyright__="""
Copyright (c) 1999-2000, Marc-Andre Lemburg; mailto:mal@lemburg.com
Copyright (c) 2000-2010, eGenix.com Software GmbH; mailto:info@egenix.com
Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee or royalty is hereby granted,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation or portions thereof, including modifications,
that you make.
EGENIX.COM SOFTWARE GMBH DISCLAIMS ALL WARRANTIES WITH REGARD TO
THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS, IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL,
INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
WITH THE USE OR PERFORMANCE OF THIS SOFTWARE !
"""
__version__='1.0.8'
importcollections
importos
importre
importsys
importfunctools
importitertools
try:
import_wmi
exceptImportError:
_wmi=None
### Globals & Constants
# Helper for comparing two version number strings.
# Based on the description of the PHP's version_compare():
# http://php.net/manual/en/function.version-compare.php
_ver_stages= {
# any string not found in this dict, will get 0 assigned
'dev': 10,
'alpha': 20, 'a': 20,
'beta': 30, 'b': 30,
'c': 40,
'RC': 50, 'rc': 50,
# number, will get 100 assigned
'pl': 200, 'p': 200,
}
def_comparable_version(version):
component_re=re.compile(r'([0-9]+|[._+-])')
result= []
forvincomponent_re.split(version):
ifvnotin'._+-':
try:
v=int(v, 10)
t=100
exceptValueError:
t=_ver_stages.get(v, 0)
result.extend((t, v))
returnresult
### Platform specific APIs
deflibc_ver(executable=None, lib='', version='', chunksize=16384):
""" Tries to determine the libc version that the file executable
(which defaults to the Python interpreter) is linked against.
Returns a tuple of strings (lib,version) which default to the
given parameters in case the lookup fails.
Note that the function has intimate knowledge of how different
libc versions add symbols to the executable and thus is probably
only usable for executables compiled using gcc.
The file is read and scanned in chunks of chunksize bytes.
"""
ifnotexecutable:
try:
ver=os.confstr('CS_GNU_LIBC_VERSION')
# parse 'glibc 2.28' as ('glibc', '2.28')
parts=ver.split(maxsplit=1)
iflen(parts) ==2:
returntuple(parts)
except (AttributeError, ValueError, OSError):
# os.confstr() or CS_GNU_LIBC_VERSION value not available
pass
executable=sys.executable
ifnotexecutable:
# sys.executable is not set.
returnlib, version
libc_search=re.compile(b'(__libc_init)'
b'|'
b'(GLIBC_([0-9.]+))'
b'|'
br'(libc(_\w+)?\.so(?:\.(\d[0-9.]*))?)', re.ASCII)
V=_comparable_version
# We use os.path.realpath()
# here to work around problems with Cygwin not being
# able to open symlinks for reading
executable=os.path.realpath(executable)
withopen(executable, 'rb') asf:
binary=f.read(chunksize)
pos=0
whilepos<len(binary):
ifb'libc'inbinaryorb'GLIBC'inbinary:
m=libc_search.search(binary, pos)
else:
m=None
ifnotmorm.end() ==len(binary):
chunk=f.read(chunksize)
ifchunk:
binary=binary[max(pos, len(binary) -1000):] +chunk
pos=0
continue
ifnotm:
break
libcinit, glibc, glibcversion, so, threads, soversion= [
s.decode('latin1') ifsisnotNoneelses
forsinm.groups()]
iflibcinitandnotlib:
lib='libc'
elifglibc:
iflib!='glibc':
lib='glibc'
version=glibcversion
elifV(glibcversion) >V(version):
version=glibcversion
elifso:
iflib!='glibc':
lib='libc'
ifsoversionand (notversionorV(soversion) >V(version)):
version=soversion
ifthreadsandversion[-len(threads):] !=threads:
version=version+threads
pos=m.end()
returnlib, version
def_norm_version(version, build=''):
""" Normalize the version and build strings and return a single
version string using the format major.minor.build (or patchlevel).
"""
l=version.split('.')
ifbuild:
l.append(build)
try:
strings=list(map(str, map(int, l)))
exceptValueError:
strings=l
version='.'.join(strings[:3])
returnversion
# Examples of VER command output:
#
# Windows 2000: Microsoft Windows 2000 [Version 5.00.2195]
# Windows XP: Microsoft Windows XP [Version 5.1.2600]
# Windows Vista: Microsoft Windows [Version 6.0.6002]
#
# Note that the "Version" string gets localized on different
# Windows versions.
def_syscmd_ver(system='', release='', version='',
supported_platforms=('win32', 'win16', 'dos')):
""" Tries to figure out the OS version used and returns
a tuple (system, release, version).
It uses the "ver" shell command for this which is known
to exists on Windows, DOS. XXX Others too ?
In case this fails, the given parameters are used as
defaults.
"""
ifsys.platformnotinsupported_platforms:
returnsystem, release, version
# Try some common cmd strings
importsubprocess
forcmdin ('ver', 'command /c ver', 'cmd /c ver'):
try:
info=subprocess.check_output(cmd,
stdin=subprocess.DEVNULL,
stderr=subprocess.DEVNULL,
text=True,
encoding="locale",
shell=True)
except (OSError, subprocess.CalledProcessError) aswhy:
#print('Command %s failed: %s' % (cmd, why))
continue
else:
break
else:
returnsystem, release, version
ver_output=re.compile(r'(?:([\w ]+) ([\w.]+) '
r'.*'
r'\[.* ([\d.]+)\])')
# Parse the output
info=info.strip()
m=ver_output.match(info)
ifmisnotNone:
system, release, version=m.groups()
# Strip trailing dots from version and release
ifrelease[-1] =='.':
release=release[:-1]
ifversion[-1] =='.':
version=version[:-1]
# Normalize the version and build strings (eliminating additional
# zeros)
version=_norm_version(version)
returnsystem, release, version
def_wmi_query(table, *keys):
global_wmi
ifnot_wmi:
raiseOSError("not supported")
table= {
"OS": "Win32_OperatingSystem",
"CPU": "Win32_Processor",
}[table]
try:
data=_wmi.exec_query("SELECT {} FROM {}".format(
",".join(keys),
table,
)).split("\0")
exceptOSError:
_wmi=None
raiseOSError("not supported")
split_data= (i.partition("=") foriindata)
dict_data= {i[0]: i[2] foriinsplit_data}
return (dict_data[k] forkinkeys)
_WIN32_CLIENT_RELEASES= [
((10, 1, 0), "post11"),
((10, 0, 22000), "11"),
((6, 4, 0), "10"),
((6, 3, 0), "8.1"),
((6, 2, 0), "8"),
((6, 1, 0), "7"),
((6, 0, 0), "Vista"),
((5, 2, 3790), "XP64"),
((5, 2, 0), "XPMedia"),
((5, 1, 0), "XP"),
((5, 0, 0), "2000"),
]
_WIN32_SERVER_RELEASES= [
((10, 1, 0), "post2025Server"),
((10, 0, 26100), "2025Server"),
((10, 0, 20348), "2022Server"),
((10, 0, 17763), "2019Server"),
((6, 4, 0), "2016Server"),
((6, 3, 0), "2012ServerR2"),
((6, 2, 0), "2012Server"),
((6, 1, 0), "2008ServerR2"),
((6, 0, 0), "2008Server"),
((5, 2, 0), "2003Server"),
((5, 0, 0), "2000Server"),
]
defwin32_is_iot():
returnwin32_edition() in ('IoTUAP', 'NanoServer', 'WindowsCoreHeadless', 'IoTEdgeOS')
defwin32_edition():
try:
importwinreg
exceptImportError:
pass
else:
try:
cvkey=r'SOFTWARE\Microsoft\Windows NT\CurrentVersion'
withwinreg.OpenKeyEx(winreg.HKEY_LOCAL_MACHINE, cvkey) askey:
returnwinreg.QueryValueEx(key, 'EditionId')[0]
exceptOSError:
pass
returnNone
def_win32_ver(version, csd, ptype):
# Try using WMI first, as this is the canonical source of data
try:
(version, product_type, ptype, spmajor, spminor) =_wmi_query(
'OS',
'Version',
'ProductType',
'BuildType',
'ServicePackMajorVersion',
'ServicePackMinorVersion',
)
is_client= (int(product_type) ==1)
ifspminorandspminor!='0':
csd=f'SP{spmajor}.{spminor}'
else:
csd=f'SP{spmajor}'
returnversion, csd, ptype, is_client
exceptOSError:
pass
# Fall back to a combination of sys.getwindowsversion and "ver"
try:
fromsysimportgetwindowsversion
exceptImportError:
returnversion, csd, ptype, True
winver=getwindowsversion()
is_client= (getattr(winver, 'product_type', 1) ==1)
try:
version=_syscmd_ver()[2]
major, minor, build=map(int, version.split('.'))
exceptValueError:
major, minor, build=winver.platform_versionorwinver[:3]
version='{0}.{1}.{2}'.format(major, minor, build)
# getwindowsversion() reflect the compatibility mode Python is
# running under, and so the service pack value is only going to be
# valid if the versions match.
ifwinver[:2] == (major, minor):
try:
csd='SP{}'.format(winver.service_pack_major)
exceptAttributeError:
ifcsd[:13] =='Service Pack ':
csd='SP'+csd[13:]
try:
importwinreg
exceptImportError:
pass
else:
try:
cvkey=r'SOFTWARE\Microsoft\Windows NT\CurrentVersion'
withwinreg.OpenKeyEx(winreg.HKEY_LOCAL_MACHINE, cvkey) askey:
ptype=winreg.QueryValueEx(key, 'CurrentType')[0]
exceptOSError:
pass
returnversion, csd, ptype, is_client
defwin32_ver(release='', version='', csd='', ptype=''):
is_client=False
version, csd, ptype, is_client=_win32_ver(version, csd, ptype)
ifversion:
intversion=tuple(map(int, version.split('.')))
releases=_WIN32_CLIENT_RELEASESifis_clientelse_WIN32_SERVER_RELEASES
release=next((rforv, rinreleasesifv<=intversion), release)
returnrelease, version, csd, ptype
def_mac_ver_xml():
fn='/System/Library/CoreServices/SystemVersion.plist'
ifnotos.path.exists(fn):
returnNone
try:
importplistlib
exceptImportError:
returnNone
withopen(fn, 'rb') asf:
pl=plistlib.load(f)
release=pl['ProductVersion']
versioninfo= ('', '', '')
machine=os.uname().machine
ifmachinein ('ppc', 'Power Macintosh'):
# Canonical name
machine='PowerPC'
returnrelease, versioninfo, machine
defmac_ver(release='', versioninfo=('', '', ''), machine=''):
""" Get macOS version information and return it as tuple (release,
versioninfo, machine) with versioninfo being a tuple (version,
dev_stage, non_release_version).
Entries which cannot be determined are set to the parameter values
which default to ''. All tuple entries are strings.
"""
# First try reading the information from an XML file which should
# always be present
info=_mac_ver_xml()
ifinfoisnotNone:
returninfo
# If that also doesn't work return the default values
returnrelease, versioninfo, machine
# A namedtuple for iOS version information.
IOSVersionInfo=collections.namedtuple(
"IOSVersionInfo",
["system", "release", "model", "is_simulator"]
)
defios_ver(system="", release="", model="", is_simulator=False):
"""Get iOS version information, and return it as a namedtuple:
(system, release, model, is_simulator).
If values can't be determined, they are set to values provided as
parameters.
"""
ifsys.platform=="ios":
import_ios_support
result=_ios_support.get_platform_ios()
ifresultisnotNone:
returnIOSVersionInfo(*result)
returnIOSVersionInfo(system, release, model, is_simulator)
def_java_getprop(name, default):
"""This private helper is deprecated in 3.13 and will be removed in 3.15"""
fromjava.langimportSystem
try:
value=System.getProperty(name)
ifvalueisNone:
returndefault
returnvalue
exceptAttributeError:
returndefault
defjava_ver(release='', vendor='', vminfo=('', '', ''), osinfo=('', '', '')):
""" Version interface for Jython.
Returns a tuple (release, vendor, vminfo, osinfo) with vminfo being
a tuple (vm_name, vm_release, vm_vendor) and osinfo being a
tuple (os_name, os_version, os_arch).
Values which cannot be determined are set to the defaults
given as parameters (which all default to '').
"""
importwarnings
warnings._deprecated('java_ver', remove=(3, 15))
# Import the needed APIs
try:
importjava.lang
exceptImportError:
returnrelease, vendor, vminfo, osinfo
vendor=_java_getprop('java.vendor', vendor)
release=_java_getprop('java.version', release)
vm_name, vm_release, vm_vendor=vminfo
vm_name=_java_getprop('java.vm.name', vm_name)
vm_vendor=_java_getprop('java.vm.vendor', vm_vendor)
vm_release=_java_getprop('java.vm.version', vm_release)
vminfo=vm_name, vm_release, vm_vendor
os_name, os_version, os_arch=osinfo
os_arch=_java_getprop('java.os.arch', os_arch)
os_name=_java_getprop('java.os.name', os_name)
os_version=_java_getprop('java.os.version', os_version)
osinfo=os_name, os_version, os_arch
returnrelease, vendor, vminfo, osinfo
AndroidVer=collections.namedtuple(
"AndroidVer", "release api_level manufacturer model device is_emulator")
defandroid_ver(release="", api_level=0, manufacturer="", model="", device="",
is_emulator=False):
ifsys.platform=="android":
try:
fromctypesimportCDLL, c_char_p, create_string_buffer
exceptImportError:
pass
else:
# An NDK developer confirmed that this is an officially-supported
# API (https://stackoverflow.com/a/28416743). Use `getattr` to avoid
# private name mangling.
system_property_get=getattr(CDLL("libc.so"), "__system_property_get")
system_property_get.argtypes= (c_char_p, c_char_p)
defgetprop(name, default):
# https://android.googlesource.com/platform/bionic/+/refs/tags/android-5.0.0_r1/libc/include/sys/system_properties.h#39
PROP_VALUE_MAX=92
buffer=create_string_buffer(PROP_VALUE_MAX)
length=system_property_get(name.encode("UTF-8"), buffer)
iflength==0:
# This API doesn’t distinguish between an empty property and
# a missing one.
returndefault
else:
returnbuffer.value.decode("UTF-8", "backslashreplace")
release=getprop("ro.build.version.release", release)
api_level=int(getprop("ro.build.version.sdk", api_level))
manufacturer=getprop("ro.product.manufacturer", manufacturer)
model=getprop("ro.product.model", model)
device=getprop("ro.product.device", device)
is_emulator=getprop("ro.kernel.qemu", "0") =="1"
returnAndroidVer(
release, api_level, manufacturer, model, device, is_emulator)
### System name aliasing
defsystem_alias(system, release, version):
""" Returns (system, release, version) aliased to common
marketing names used for some systems.
It also does some reordering of the information in some cases
where it would otherwise cause confusion.
"""
ifsystem=='SunOS':
# Sun's OS
ifrelease<'5':
# These releases use the old name SunOS
returnsystem, release, version
# Modify release (marketing release = SunOS release - 3)
l=release.split('.')
ifl:
try:
major=int(l[0])
exceptValueError:
pass
else:
major=major-3
l[0] =str(major)
release='.'.join(l)
ifrelease<'6':
system='Solaris'
else:
# XXX Whatever the new SunOS marketing name is...
system='Solaris'
elifsystemin ('win32', 'win16'):
# In case one of the other tricks
system='Windows'
# bpo-35516: Don't replace Darwin with macOS since input release and
# version arguments can be different than the currently running version.
returnsystem, release, version
### Various internal helpers
def_platform(*args):
""" Helper to format the platform string in a filename
compatible format e.g. "system-version-machine".
"""
# Format the platform string
platform='-'.join(x.strip() forxinfilter(len, args))
# Cleanup some possible filename obstacles...
platform=platform.replace(' ', '_')
platform=platform.replace('/', '-')
platform=platform.replace('\\', '-')
platform=platform.replace(':', '-')
platform=platform.replace(';', '-')
platform=platform.replace('"', '-')
platform=platform.replace('(', '-')
platform=platform.replace(')', '-')
# No need to report 'unknown' information...
platform=platform.replace('unknown', '')
# Fold '--'s and remove trailing '-'
whileTrue:
cleaned=platform.replace('--', '-')
ifcleaned==platform:
break
platform=cleaned
whileplatformandplatform[-1] =='-':
platform=platform[:-1]
returnplatform
def_node(default=''):
""" Helper to determine the node name of this machine.
"""
try:
importsocket
exceptImportError:
# No sockets...
returndefault
try:
returnsocket.gethostname()
exceptOSError:
# Still not working...
returndefault
def_follow_symlinks(filepath):
""" In case filepath is a symlink, follow it until a
real file is reached.
"""
filepath=os.path.abspath(filepath)
whileos.path.islink(filepath):
filepath=os.path.normpath(
os.path.join(os.path.dirname(filepath), os.readlink(filepath)))
returnfilepath
def_syscmd_file(target, default=''):
""" Interface to the system's file command.
The function uses the -b option of the file command to have it
omit the filename in its output. Follow the symlinks. It returns
default in case the command should fail.
"""
ifsys.platformin {'dos', 'win32', 'win16', 'ios', 'tvos', 'watchos'}:
# XXX Others too ?
returndefault
try:
importsubprocess
exceptImportError:
returndefault
target=_follow_symlinks(target)
# "file" output is locale dependent: force the usage of the C locale
# to get deterministic behavior.
env=dict(os.environ, LC_ALL='C')
try:
# -b: do not prepend filenames to output lines (brief mode)
output=subprocess.check_output(['file', '-b', target],
stderr=subprocess.DEVNULL,
env=env)
except (OSError, subprocess.CalledProcessError):
returndefault
ifnotoutput:
returndefault
# With the C locale, the output should be mostly ASCII-compatible.
# Decode from Latin-1 to prevent Unicode decode error.
returnoutput.decode('latin-1')
### Information about the used architecture
# Default values for architecture; non-empty strings override the
# defaults given as parameters
_default_architecture= {
'win32': ('', 'WindowsPE'),
'win16': ('', 'Windows'),
'dos': ('', 'MSDOS'),
}
defarchitecture(executable=sys.executable, bits='', linkage=''):
""" Queries the given executable (defaults to the Python interpreter
binary) for various architecture information.
Returns a tuple (bits, linkage) which contains information about
the bit architecture and the linkage format used for the
executable. Both values are returned as strings.
Values that cannot be determined are returned as given by the
parameter presets. If bits is given as '', the sizeof(pointer)
(or sizeof(long) on Python version < 1.5.2) is used as
indicator for the supported pointer size.
The function relies on the system's "file" command to do the
actual work. This is available on most if not all Unix
platforms. On some non-Unix platforms where the "file" command
does not exist and the executable is set to the Python interpreter
binary defaults from _default_architecture are used.
"""
# Use the sizeof(pointer) as default number of bits if nothing
# else is given as default.
ifnotbits:
importstruct
size=struct.calcsize('P')
bits=str(size*8) +'bit'
# Get data from the 'file' system command
ifexecutable:
fileout=_syscmd_file(executable, '')
else:
fileout=''
ifnotfileoutand \
executable==sys.executable:
# "file" command did not return anything; we'll try to provide
# some sensible defaults then...
ifsys.platformin_default_architecture:
b, l=_default_architecture[sys.platform]
ifb:
bits=b
ifl:
linkage=l
returnbits, linkage
if'executable'notinfileoutand'shared object'notinfileout:
# Format not supported
returnbits, linkage
# Bits
if'32-bit'infileout:
bits='32bit'
elif'64-bit'infileout:
bits='64bit'
# Linkage
if'ELF'infileout:
linkage='ELF'
elif'Mach-O'infileout:
linkage="Mach-O"
elif'PE'infileout:
# E.g. Windows uses this format
if'Windows'infileout:
linkage='WindowsPE'
else:
linkage='PE'
elif'COFF'infileout:
linkage='COFF'
elif'MS-DOS'infileout:
linkage='MSDOS'
else:
# XXX the A.OUT format also falls under this class...
pass
returnbits, linkage
def_get_machine_win32():
# Try to use the PROCESSOR_* environment variables
# available on Win XP and later; see
# http://support.microsoft.com/kb/888731 and
# http://www.geocities.com/rick_lively/MANUALS/ENV/MSWIN/PROCESSI.HTM
# WOW64 processes mask the native architecture
try:
[arch, *_] =_wmi_query('CPU', 'Architecture')
exceptOSError:
pass
else:
try:
arch= ['x86', 'MIPS', 'Alpha', 'PowerPC', None,
'ARM', 'ia64', None, None,
'AMD64', None, None, 'ARM64',
][int(arch)]
except (ValueError, IndexError):
pass
else:
ifarch:
returnarch
return (
os.environ.get('PROCESSOR_ARCHITEW6432', '') or
os.environ.get('PROCESSOR_ARCHITECTURE', '')
)
class_Processor:
@classmethod
defget(cls):
func=getattr(cls, f'get_{sys.platform}', cls.from_subprocess)
returnfunc() or''
defget_win32():
try:
manufacturer, caption=_wmi_query('CPU', 'Manufacturer', 'Caption')
exceptOSError:
returnos.environ.get('PROCESSOR_IDENTIFIER', _get_machine_win32())
else:
returnf'{caption}, {manufacturer}'
defget_OpenVMS():
try:
importvms_lib
exceptImportError:
pass
else:
csid, cpu_number=vms_lib.getsyi('SYI$_CPU', 0)
return'Alpha'ifcpu_number>=128else'VAX'
# On the iOS simulator, os.uname returns the architecture as uname.machine.
# On device it returns the model name for some reason; but there's only one
# CPU architecture for iOS devices, so we know the right answer.
defget_ios():
ifsys.implementation._multiarch.endswith("simulator"):
returnos.uname().machine
return'arm64'
deffrom_subprocess():
"""
Fall back to `uname -p`
"""
try:
importsubprocess
exceptImportError:
returnNone
try:
returnsubprocess.check_output(
['uname', '-p'],
stderr=subprocess.DEVNULL,
text=True,
encoding="utf8",
).strip()
except (OSError, subprocess.CalledProcessError):
pass
def_unknown_as_blank(val):
return''ifval=='unknown'elseval
### Portable uname() interface
classuname_result(
collections.namedtuple(
"uname_result_base",
"system node release version machine")
):
"""
A uname_result that's largely compatible with a
simple namedtuple except that 'processor' is
resolved late and cached to avoid calling "uname"
except when needed.
"""
_fields= ('system', 'node', 'release', 'version', 'machine', 'processor')
@functools.cached_property
defprocessor(self):
return_unknown_as_blank(_Processor.get())
def__iter__(self):
returnitertools.chain(
super().__iter__(),
(self.processor,)
)
@classmethod
def_make(cls, iterable):
# override factory to affect length check
num_fields=len(cls._fields) -1
result=cls.__new__(cls, *iterable)
iflen(result) !=num_fields+1:
msg=f'Expected {num_fields} arguments, got {len(result)}'
raiseTypeError(msg)
returnresult
def__getitem__(self, key):
returntuple(self)[key]
def__len__(self):
returnlen(tuple(iter(self)))
def__reduce__(self):
returnuname_result, tuple(self)[:len(self._fields) -1]
_uname_cache=None
defuname():
""" Fairly portable uname interface. Returns a tuple
of strings (system, node, release, version, machine, processor)
identifying the underlying platform.
Note that unlike the os.uname function this also returns
possible processor information as an additional tuple entry.
Entries which cannot be determined are set to ''.
"""
global_uname_cache
if_uname_cacheisnotNone:
return_uname_cache
# Get some infos from the builtin os.uname API...
try:
system, node, release, version, machine=infos=os.uname()
exceptAttributeError:
system=sys.platform
node=_node()
release=version=machine=''
infos= ()
ifnotany(infos):
# uname is not available
# Try win32_ver() on win32 platforms
ifsystem=='win32':
release, version, csd, ptype=win32_ver()
machine=machineor_get_machine_win32()
