platform.py 39.2 KB
Newer Older
1 2
#!/usr/bin/env python

Brett Cannon's avatar
Brett Cannon committed
3
""" This module tries to retrieve as much platform-identifying data as
4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
    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 useable 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 SourceForge Project Page and assign them to "lemburg".
#
#    Note: Please keep this module compatible to Python 1.5.2.
#
#    Still needed:
#    * more support for WinCE
#    * support for MS-DOS (PythonDX ?)
#    * support for Amiga and other still unsupported platforms running Python
#    * support for additional Linux distributions
#
Brett Cannon's avatar
Brett Cannon committed
23
#    Many thanks to all those who helped adding platform-specific
24 25 26 27 28 29 30
#    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),
31
#      Colin Kong, Trent Mick, Guido van Rossum
32 33
#
#    History:
34
#    1.0.3 - added normalization of Windows system name
35
#    1.0.2 - added more Windows support
36
#    1.0.1 - reformatted to make doc.py happy
37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106
#    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 emtpy)
#    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 invokation 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) 2000-2003, 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 !

"""

107
__version__ = '1.0.2'
108 109 110 111 112

import sys,string,os,re

### Platform specific APIs

113 114
_libc_search = re.compile(r'(__libc_init)'
                          '|'
Tim Peters's avatar
Tim Peters committed
115 116
                          '(GLIBC_([0-9.]+))'
                          '|'
117 118
                          '(libc(_\w+)?\.so(?:\.(\d[0-9.]*))?)')

119 120
def libc_ver(executable=sys.executable,lib='',version='',

121
             chunksize=2048):
122

Brett Cannon's avatar
Brett Cannon committed
123 124
    """ Tries to determine the libc version that the file executable
        (which defaults to the Python interpreter) is linked against.
125 126 127 128 129

        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
Brett Cannon's avatar
Brett Cannon committed
130 131
        libc versions add symbols to the executable and thus is probably
        only useable for executables compiled using gcc.
132 133 134 135 136 137 138 139

        The file is read and scanned in chunks of chunksize bytes.

    """
    f = open(executable,'rb')
    binary = f.read(chunksize)
    pos = 0
    while 1:
140
        m = _libc_search.search(binary,pos)
141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168
        if not m:
            binary = f.read(chunksize)
            if not binary:
                break
            pos = 0
            continue
        libcinit,glibc,glibcversion,so,threads,soversion = m.groups()
        if libcinit and not lib:
            lib = 'libc'
        elif glibc:
            if lib != 'glibc':
                lib = 'glibc'
                version = glibcversion
            elif glibcversion > version:
                version = glibcversion
        elif so:
            if lib != 'glibc':
                lib = 'libc'
                if soversion > version:
                    version = soversion
                if threads and version[-len(threads):] != threads:
                    version = version + threads
        pos = m.end()
    f.close()
    return lib,version

def _dist_try_harder(distname,version,id):

Tim Peters's avatar
Tim Peters committed
169
    """ Tries some special tricks to get the distribution
170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205
        information in case the default method fails.

        Currently supports older SuSE Linux, Caldera OpenLinux and
        Slackware Linux distributions.

    """
    if os.path.exists('/var/adm/inst-log/info'):
        # SuSE Linux stores distribution information in that file
        info = open('/var/adm/inst-log/info').readlines()
        distname = 'SuSE'
        for line in info:
            tv = string.split(line)
            if len(tv) == 2:
                tag,value = tv
            else:
                continue
            if tag == 'MIN_DIST_VERSION':
                version = string.strip(value)
            elif tag == 'DIST_IDENT':
                values = string.split(value,'-')
                id = values[2]
        return distname,version,id

    if os.path.exists('/etc/.installed'):
        # Caldera OpenLinux has some infos in that file (thanks to Colin Kong)
        info = open('/etc/.installed').readlines()
        for line in info:
            pkg = string.split(line,'-')
            if len(pkg) >= 2 and pkg[0] == 'OpenLinux':
                # XXX does Caldera support non Intel platforms ? If yes,
                #     where can we find the needed id ?
                return 'OpenLinux',pkg[1],id

    if os.path.isdir('/usr/lib/setup'):
        # Check for slackware verson tag file (thanks to Greg Andruk)
        verfiles = os.listdir('/usr/lib/setup')
206
        for n in range(len(verfiles)-1, -1, -1):
207 208 209 210 211 212 213 214 215 216
            if verfiles[n][:14] != 'slack-version-':
                del verfiles[n]
        if verfiles:
            verfiles.sort()
            distname = 'slackware'
            version = verfiles[-1][14:]
            return distname,version,id

    return distname,version,id

217 218 219
_release_filename = re.compile(r'(\w+)[-_](release|version)')
_release_version = re.compile(r'([\d.]+)[^(]*(?:\((.+)\))?')

220 221
def dist(distname='',version='',id='',

222
         supported_dists=('SuSE','debian','redhat','mandrake')):
223

Brett Cannon's avatar
Brett Cannon committed
224
    """ Tries to determine the name of the Linux OS distribution name.
225 226 227 228 229

        The function first looks for a distribution release file in
        /etc and then reverts to _dist_try_harder() in case no
        suitable files are found.

Brett Cannon's avatar
Brett Cannon committed
230
        Returns a tuple (distname,version,id) which default to the
231 232 233 234 235 236 237 238 239
        args given as parameters.

    """
    try:
        etc = os.listdir('/etc')
    except os.error:
        # Probably not a Unix system
        return distname,version,id
    for file in etc:
240
        m = _release_filename.match(file)
241 242 243 244 245 246 247 248 249 250
        if m:
            _distname,dummy = m.groups()
            if _distname in supported_dists:
                distname = _distname
                break
    else:
        return _dist_try_harder(distname,version,id)
    f = open('/etc/'+file,'r')
    firstline = f.readline()
    f.close()
251
    m = _release_version.search(firstline)
252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355
    if m:
        _version,_id = m.groups()
        if _version:
            version = _version
        if _id:
            id = _id
    else:
        # Unkown format... take the first two words
        l = string.split(string.strip(firstline))
        if l:
            version = l[0]
            if len(l) > 1:
                id = l[1]
    return distname,version,id

class _popen:

    """ Fairly portable (alternative) popen implementation.

        This is mostly needed in case os.popen() is not available, or
        doesn't work as advertised, e.g. in Win9X GUI programs like
        PythonWin or IDLE.

        Writing to the pipe is currently not supported.

    """
    tmpfile = ''
    pipe = None
    bufsize = None
    mode = 'r'

    def __init__(self,cmd,mode='r',bufsize=None):

        if mode != 'r':
            raise ValueError,'popen()-emulation only supports read mode'
        import tempfile
        self.tmpfile = tmpfile = tempfile.mktemp()
        os.system(cmd + ' > %s' % tmpfile)
        self.pipe = open(tmpfile,'rb')
        self.bufsize = bufsize
        self.mode = mode

    def read(self):

        return self.pipe.read()

    def readlines(self):

        if self.bufsize is not None:
            return self.pipe.readlines()

    def close(self,

              remove=os.unlink,error=os.error):

        if self.pipe:
            rc = self.pipe.close()
        else:
            rc = 255
        if self.tmpfile:
            try:
                remove(self.tmpfile)
            except error:
                pass
        return rc

    # Alias
    __del__ = close

def popen(cmd, mode='r', bufsize=None):

    """ Portable popen() interface.
    """
    # Find a working popen implementation preferring win32pipe.popen
    # over os.popen over _popen
    popen = None
    if os.environ.get('OS','') == 'Windows_NT':
        # On NT win32pipe should work; on Win9x it hangs due to bugs
        # in the MS C lib (see MS KnowledgeBase article Q150956)
        try:
            import win32pipe
        except ImportError:
            pass
        else:
            popen = win32pipe.popen
    if popen is None:
        if hasattr(os,'popen'):
            popen = os.popen
            # Check whether it works... it doesn't in GUI programs
            # on Windows platforms
            if sys.platform == 'win32': # XXX Others too ?
                try:
                    popen('')
                except os.error:
                    popen = _popen
        else:
            popen = _popen
    if bufsize is None:
        return popen(cmd,mode)
    else:
        return popen(cmd,mode,bufsize)

def _norm_version(version,build=''):

Brett Cannon's avatar
Brett Cannon committed
356
    """ Normalize the version and build strings and return a single
357 358 359 360 361 362 363 364 365 366 367 368 369 370
        vesion string using the format major.minor.build (or patchlevel).
    """
    l = string.split(version,'.')
    if build:
        l.append(build)
    try:
        ints = map(int,l)
    except ValueError:
        strings = l
    else:
        strings = map(str,ints)
    version = string.join(strings[:3],'.')
    return version

371 372 373 374
_ver_output = re.compile(r'(?:([\w ]+) ([\w.]+) '
                         '.*'
                         'Version ([\d.]+))')

375 376
def _syscmd_ver(system='',release='',version='',

377
               supported_platforms=('win32','win16','dos','os2')):
378 379 380

    """ Tries to figure out the OS version used and returns
        a tuple (system,release,version).
Tim Peters's avatar
Tim Peters committed
381

382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413
        It uses the "ver" shell command for this which is known
        to exists on Windows, DOS and OS/2. XXX Others too ?

        In case this fails, the given parameters are used as
        defaults.

    """
    if sys.platform not in supported_platforms:
        return system,release,version

    # Try some common cmd strings
    for cmd in ('ver','command /c ver','cmd /c ver'):
        try:
            pipe = popen(cmd)
            info = pipe.read()
            if pipe.close():
                raise os.error,'command failed'
            # XXX How can I supress shell errors from being written
            #     to stderr ?
        except os.error,why:
            #print 'Command %s failed: %s' % (cmd,why)
            continue
        except IOError,why:
            #print 'Command %s failed: %s' % (cmd,why)
            continue
        else:
            break
    else:
        return system,release,version

    # Parse the output
    info = string.strip(info)
414
    m = _ver_output.match(info)
415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453
    if m:
        system,release,version = m.groups()
        # Strip trailing dots from version and release
        if release[-1] == '.':
            release = release[:-1]
        if version[-1] == '.':
            version = version[:-1]
        # Normalize the version and build strings (eliminating additional
        # zeros)
        version = _norm_version(version)
    return system,release,version

def _win32_getvalue(key,name,default=''):

    """ Read a value for name from the registry key.

        In case this fails, default is returned.

    """
    from win32api import RegQueryValueEx
    try:
        return RegQueryValueEx(key,name)
    except:
        return default

def win32_ver(release='',version='',csd='',ptype=''):

    """ Get additional version information from the Windows Registry
        and return a tuple (version,csd,ptype) referring to version
        number, CSD level and OS type (multi/single
        processor).

        As a hint: ptype returns 'Uniprocessor Free' on single
        processor NT machines and 'Multiprocessor Free' on multi
        processor machines. The 'Free' refers to the OS version being
        free of debugging code. It could also state 'Checked' which
        means the OS version uses debugging code, i.e. code that
        checks arguments, ranges, etc. (Thomas Heller).

Andrew M. Kuchling's avatar
Andrew M. Kuchling committed
454
        Note: this function only works if Mark Hammond's win32
455 456 457 458 459 460
        package is installed and obviously only runs on Win32
        compatible platforms.

    """
    # XXX Is there any way to find out the processor type on WinXX ?
    # XXX Is win32 available on Windows CE ?
461
    #
462
    # Adapted from code posted by Karl Putland to comp.lang.python.
463 464 465
    #
    # The mappings between reg. values and release names can be found
    # here: http://msdn.microsoft.com/library/en-us/sysinfo/base/osversioninfo_str.asp
466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486

    # Import the needed APIs
    try:
        import win32api
    except ImportError:
        return release,version,csd,ptype
    from win32api import RegQueryValueEx,RegOpenKeyEx,RegCloseKey,GetVersionEx
    from win32con import HKEY_LOCAL_MACHINE,VER_PLATFORM_WIN32_NT,\
                         VER_PLATFORM_WIN32_WINDOWS

    # Find out the registry key and some general version infos
    maj,min,buildno,plat,csd = GetVersionEx()
    version = '%i.%i.%i' % (maj,min,buildno & 0xFFFF)
    if csd[:13] == 'Service Pack ':
        csd = 'SP' + csd[13:]
    if plat == VER_PLATFORM_WIN32_WINDOWS:
        regkey = 'SOFTWARE\\Microsoft\\Windows\\CurrentVersion'
        # Try to guess the release name
        if maj == 4:
            if min == 0:
                release = '95'
487
            elif min == 10:
488
                release = '98'
489 490 491 492
            elif min == 90:
                release = 'Me'
            else:
                release = 'postMe'
493 494 495 496 497 498 499
        elif maj == 5:
            release = '2000'
    elif plat == VER_PLATFORM_WIN32_NT:
        regkey = 'SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion'
        if maj <= 4:
            release = 'NT'
        elif maj == 5:
500 501 502 503 504 505 506 507
            if min == 0:
                release = '2000'
            elif min == 1:
                release = 'XP'
            elif min == 2:
                release = '2003Server'
            else:
                release = 'post2003'
508 509 510 511 512 513 514 515 516 517 518 519 520
    else:
        if not release:
            # E.g. Win3.1 with win32s
            release = '%i.%i' % (maj,min)
        return release,version,csd,ptype

    # Open the registry key
    try:
        keyCurVer = RegOpenKeyEx(HKEY_LOCAL_MACHINE,regkey)
        # Get a value to make sure the key exists...
        RegQueryValueEx(keyCurVer,'SystemRoot')
    except:
        return release,version,csd,ptype
Tim Peters's avatar
Tim Peters committed
521

522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544
    # Parse values
    #subversion = _win32_getvalue(keyCurVer,
    #                            'SubVersionNumber',
    #                            ('',1))[0]
    #if subversion:
    #   release = release + subversion # 95a, 95b, etc.
    build = _win32_getvalue(keyCurVer,
                            'CurrentBuildNumber',
                            ('',1))[0]
    ptype = _win32_getvalue(keyCurVer,
                           'CurrentType',
                           (ptype,1))[0]

    # Normalize version
    version = _norm_version(version,build)

    # Close key
    RegCloseKey(keyCurVer)
    return release,version,csd,ptype

def _mac_ver_lookup(selectors,default=None):

    from gestalt import gestalt
545
    import MacOS
546 547 548 549 550
    l = []
    append = l.append
    for selector in selectors:
        try:
            append(gestalt(selector))
551
        except (RuntimeError, MacOS.Error):
552 553 554 555 556 557 558 559 560 561 562 563 564
            append(default)
    return l

def _bcd2str(bcd):

    return hex(bcd)[2:]

def mac_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).

Brett Cannon's avatar
Brett Cannon committed
565 566
        Entries which cannot be determined are set to the paramter values
        which default to ''. All tuple entries are strings.
567 568 569 570 571 572 573 574 575 576 577

        Thanks to Mark R. Levinson for mailing documentation links and
        code examples for this function. Documentation for the
        gestalt() API is available online at:

           http://www.rgaros.nl/gestalt/

    """
    # Check whether the version info module is available
    try:
        import gestalt
578
        import MacOS
579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602
    except ImportError:
        return release,versioninfo,machine
    # Get the infos
    sysv,sysu,sysa = _mac_ver_lookup(('sysv','sysu','sysa'))
    # Decode the infos
    if sysv:
        major = (sysv & 0xFF00) >> 8
        minor = (sysv & 0x00F0) >> 4
        patch = (sysv & 0x000F)
        release = '%s.%i.%i' % (_bcd2str(major),minor,patch)
    if sysu:
        major =  int((sysu & 0xFF000000L) >> 24)
        minor =  (sysu & 0x00F00000) >> 20
        bugfix = (sysu & 0x000F0000) >> 16
        stage =  (sysu & 0x0000FF00) >> 8
        nonrel = (sysu & 0x000000FF)
        version = '%s.%i.%i' % (_bcd2str(major),minor,bugfix)
        nonrel = _bcd2str(nonrel)
        stage = {0x20:'development',
                 0x40:'alpha',
                 0x60:'beta',
                 0x80:'final'}.get(stage,'')
        versioninfo = (version,stage,nonrel)
    if sysa:
Tim Peters's avatar
Tim Peters committed
603
        machine = {0x1: '68k',
604 605 606
                   0x2: 'PowerPC'}.get(sysa,'')
    return release,versioninfo,machine

607
def _java_getprop(name,default):
608 609 610 611 612 613 614 615

    from java.lang import System
    try:
        return System.getProperty(name)
    except:
        return default

def java_ver(release='',vendor='',vminfo=('','',''),osinfo=('','','')):
Tim Peters's avatar
Tim Peters committed
616

Brett Cannon's avatar
Brett Cannon committed
617
    """ Version interface for Jython.
618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644

        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 '').

    """
    # Import the needed APIs
    try:
        import java.lang
    except ImportError:
        return release,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
Tim Peters's avatar
Tim Peters committed
645

646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831
    return release,vendor,vminfo,osinfo

### System name aliasing

def system_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.

    """
    if system == 'Rhapsody':
        # Apple's BSD derivative
        # XXX How can we determine the marketing release number ?
        return 'MacOS X Server',system+release,version

    elif system == 'SunOS':
        # Sun's OS
        if release < '5':
            # These releases use the old name SunOS
            return system,release,version
        # Modify release (marketing release = SunOS release - 3)
        l = string.split(release,'.')
        if l:
            try:
                major = int(l[0])
            except ValueError:
                pass
            else:
                major = major - 3
                l[0] = str(major)
                release = string.join(l,'.')
        if release < '6':
            system = 'Solaris'
        else:
            # XXX Whatever the new SunOS marketing name is...
            system = 'Solaris'

    elif system == 'IRIX64':
        # IRIX reports IRIX64 on platforms with 64-bit support; yet it
        # is really a version and not a different platform, since 32-bit
        # apps are also supported..
        system = 'IRIX'
        if version:
            version = version + ' (64bit)'
        else:
            version = '64bit'

    elif system in ('win32','win16'):
        # In case one of the other tricks
        system = 'Windows'

    return system,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 = string.join(
        map(string.strip,
            filter(len,args)),
        '-')

    # Cleanup some possible filename obstacles...
    replace = string.replace
    platform = replace(platform,' ','_')
    platform = replace(platform,'/','-')
    platform = replace(platform,'\\','-')
    platform = replace(platform,':','-')
    platform = replace(platform,';','-')
    platform = replace(platform,'"','-')
    platform = replace(platform,'(','-')
    platform = replace(platform,')','-')

    # No need to report 'unknown' information...
    platform = replace(platform,'unknown','')

    # Fold '--'s and remove trailing '-'
    while 1:
        cleaned = replace(platform,'--','-')
        if cleaned == platform:
            break
        platform = cleaned
    while platform[-1] == '-':
        platform = platform[:-1]

    return platform

def _node(default=''):

    """ Helper to determine the node name of this machine.
    """
    try:
        import socket
    except ImportError:
        # No sockets...
        return default
    try:
        return socket.gethostname()
    except socket.error:
        # Still not working...
        return default

# os.path.abspath is new in Python 1.5.2:
if not hasattr(os.path,'abspath'):

    def _abspath(path,

                 isabs=os.path.isabs,join=os.path.join,getcwd=os.getcwd,
                 normpath=os.path.normpath):

        if not isabs(path):
            path = join(getcwd(), path)
        return normpath(path)

else:

    _abspath = os.path.abspath

def _follow_symlinks(filepath):

    """ In case filepath is a symlink, follow it until a
        real file is reached.
    """
    filepath = _abspath(filepath)
    while os.path.islink(filepath):
        filepath = os.path.normpath(
            os.path.join(filepath,os.readlink(filepath)))
    return filepath

def _syscmd_uname(option,default=''):

    """ Interface to the system's uname command.
    """
    if sys.platform in ('dos','win32','win16','os2'):
        # XXX Others too ?
        return default
    try:
        f = os.popen('uname %s 2> /dev/null' % option)
    except (AttributeError,os.error):
        return default
    output = string.strip(f.read())
    rc = f.close()
    if not output or rc:
        return default
    else:
        return output

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
        ommit the filename in its output and if possible the -L option
        to have the command follow symlinks. It returns default in
        case the command should fail.

    """
    target = _follow_symlinks(target)
    try:
        f = os.popen('file %s 2> /dev/null' % target)
    except (AttributeError,os.error):
        return default
    output = string.strip(f.read())
    rc = f.close()
    if not output or rc:
        return default
    else:
        return output

### 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'),
}

832
_architecture_split = re.compile(r'[\s,]').split
833

834
def architecture(executable=sys.executable,bits='',linkage=''):
835 836

    """ Queries the given executable (defaults to the Python interpreter
Brett Cannon's avatar
Brett Cannon committed
837
        binary) for various architecture information.
838

Brett Cannon's avatar
Brett Cannon committed
839
        Returns a tuple (bits,linkage) which contains information about
840 841 842 843 844 845 846 847 848 849
        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
Brett Cannon's avatar
Brett Cannon committed
850 851 852
        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.
853 854 855 856 857 858 859 860 861 862 863 864

    """
    # Use the sizeof(pointer) as default number of bits if nothing
    # else is given as default.
    if not bits:
        import struct
        try:
            size = struct.calcsize('P')
        except struct.error:
            # Older installations can only query longs
            size = struct.calcsize('l')
        bits = str(size*8) + 'bit'
Tim Peters's avatar
Tim Peters committed
865

866 867 868 869 870 871
    # Get data from the 'file' system command
    output = _syscmd_file(executable,'')

    if not output and \
       executable == sys.executable:
        # "file" command did not return anything; we'll try to provide
Tim Peters's avatar
Tim Peters committed
872
        # some sensible defaults then...
873 874 875 876 877 878 879 880 881
        if _default_architecture.has_key(sys.platform):
            b,l = _default_architecture[sys.platform]
            if b:
                bits = b
            if l:
                linkage = l
        return bits,linkage

    # Split the output into a list of strings omitting the filename
882
    fileout = _architecture_split(output)[1:]
Tim Peters's avatar
Tim Peters committed
883

884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916
    if 'executable' not in fileout:
        # Format not supported
        return bits,linkage

    # Bits
    if '32-bit' in fileout:
        bits = '32bit'
    elif 'N32' in fileout:
        # On Irix only
        bits = 'n32bit'
    elif '64-bit' in fileout:
        bits = '64bit'

    # Linkage
    if 'ELF' in fileout:
        linkage = 'ELF'
    elif 'PE' in fileout:
        # E.g. Windows uses this format
        if 'Windows' in fileout:
            linkage = 'WindowsPE'
        else:
            linkage = 'PE'
    elif 'COFF' in fileout:
        linkage = 'COFF'
    elif 'MS-DOS' in fileout:
        linkage = 'MSDOS'
    else:
        # XXX the A.OUT format also falls under this class...
        pass

    return bits,linkage

### Portable uname() interface
Tim Peters's avatar
Tim Peters committed
917

918 919 920 921 922 923 924 925 926
_uname_cache = None

def uname():

    """ 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
Brett Cannon's avatar
Brett Cannon committed
927
        possible processor information as an additional tuple entry.
928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955

        Entries which cannot be determined are set to ''.

    """
    global _uname_cache

    if _uname_cache is not None:
        return _uname_cache

    # Get some infos from the builtin os.uname API...
    try:
        system,node,release,version,machine = os.uname()

    except AttributeError:
        # Hmm, no uname... we'll have to poke around the system then.
        system = sys.platform
        release = ''
        version = ''
        node = _node()
        machine = ''
        processor = ''
        use_syscmd_ver = 1

        # Try win32_ver() on win32 platforms
        if system == 'win32':
            release,version,csd,ptype = win32_ver()
            if release and version:
                use_syscmd_ver = 0
Tim Peters's avatar
Tim Peters committed
956

957 958 959 960
        # Try the 'ver' system command available on some
        # platforms
        if use_syscmd_ver:
            system,release,version = _syscmd_ver(system)
961 962 963 964
            # Normalize system to what win32_ver() normally returns
            # (_syscmd_ver() tends to return the vendor name as well)
            if system == 'Microsoft Windows':
                system = 'Windows'
965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038

        # In case we still don't know anything useful, we'll try to
        # help ourselves
        if system in ('win32','win16'):
            if not version:
                if system == 'win32':
                    version = '32bit'
                else:
                    version = '16bit'
            system = 'Windows'

        elif system[:4] == 'java':
            release,vendor,vminfo,osinfo = java_ver()
            system = 'Java'
            version = string.join(vminfo,', ')
            if not version:
                version = vendor

        elif os.name == 'mac':
            release,(version,stage,nonrel),machine = mac_ver()
            system = 'MacOS'

    else:
        # System specific extensions
        if system == 'OpenVMS':
            # OpenVMS seems to have release and version mixed up
            if not release or release == '0':
                release = version
                version = ''
            # Get processor information
            try:
                import vms_lib
            except ImportError:
                pass
            else:
                csid, cpu_number = vms_lib.getsyi('SYI$_CPU',0)
                if (cpu_number >= 128):
                    processor = 'Alpha'
                else:
                    processor = 'VAX'
        else:
            # Get processor information from the uname system command
            processor = _syscmd_uname('-p','')

    # 'unknown' is not really any useful as information; we'll convert
    # it to '' which is more portable
    if system == 'unknown':
        system = ''
    if node == 'unknown':
        node = ''
    if release == 'unknown':
        release = ''
    if version == 'unknown':
        version = ''
    if machine == 'unknown':
        machine = ''
    if processor == 'unknown':
        processor = ''
    _uname_cache = system,node,release,version,machine,processor
    return _uname_cache

### Direct interfaces to some of the uname() return values

def system():

    """ Returns the system/OS name, e.g. 'Linux', 'Windows' or 'Java'.

        An empty string is returned if the value cannot be determined.

    """
    return uname()[0]

def node():

Brett Cannon's avatar
Brett Cannon committed
1039 1040
    """ Returns the computer's network name (which may not be fully
        qualified)
1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158

        An empty string is returned if the value cannot be determined.

    """
    return uname()[1]

def release():

    """ Returns the system's release, e.g. '2.2.0' or 'NT'

        An empty string is returned if the value cannot be determined.

    """
    return uname()[2]

def version():

    """ Returns the system's release version, e.g. '#3 on degas'

        An empty string is returned if the value cannot be determined.

    """
    return uname()[3]

def machine():

    """ Returns the machine type, e.g. 'i386'

        An empty string is returned if the value cannot be determined.

    """
    return uname()[4]

def processor():

    """ Returns the (true) processor name, e.g. 'amdk6'

        An empty string is returned if the value cannot be
        determined. Note that many platforms do not provide this
        information or simply return the same value as for machine(),
        e.g.  NetBSD does this.

    """
    return uname()[5]

### Various APIs for extracting information from sys.version

_sys_version_parser = re.compile(r'([\w.+]+)\s*'
                                  '\(#(\d+),\s*([\w ]+),\s*([\w :]+)\)\s*'
                                  '\[([^\]]+)\]?')
_sys_version_cache = None

def _sys_version():

    """ Returns a parsed version of Python's sys.version as tuple
        (version, buildno, builddate, compiler) referring to the Python
        version, build number, build date/time as string and the compiler
        identification string.

        Note that unlike the Python sys.version, the returned value
        for the Python version will always include the patchlevel (it
        defaults to '.0').

    """
    global _sys_version_cache

    if _sys_version_cache is not None:
        return _sys_version_cache
    version, buildno, builddate, buildtime, compiler = \
             _sys_version_parser.match(sys.version).groups()
    buildno = int(buildno)
    builddate = builddate + ' ' + buildtime
    l = string.split(version, '.')
    if len(l) == 2:
        l.append('0')
        version = string.join(l, '.')
    _sys_version_cache = (version, buildno, builddate, compiler)
    return _sys_version_cache

def python_version():

    """ Returns the Python version as string 'major.minor.patchlevel'

        Note that unlike the Python sys.version, the returned value
        will always include the patchlevel (it defaults to 0).

    """
    return _sys_version()[0]

def python_version_tuple():

    """ Returns the Python version as tuple (major, minor, patchlevel)
        of strings.

        Note that unlike the Python sys.version, the returned value
        will always include the patchlevel (it defaults to 0).

    """
    return string.split(_sys_version()[0], '.')

def python_build():

    """ Returns a tuple (buildno, builddate) stating the Python
        build number and date as strings.

    """
    return _sys_version()[1:3]

def python_compiler():

    """ Returns a string identifying the compiler used for compiling
        Python.

    """
    return _sys_version()[3]

### The Opus Magnum of platform strings :-)

1159
_platform_cache = {}
1160 1161 1162 1163 1164

def platform(aliased=0, terse=0):

    """ Returns a single string identifying the underlying platform
        with as much useful information as possible (but no more :).
Tim Peters's avatar
Tim Peters committed
1165

1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179
        The output is intended to be human readable rather than
        machine parseable. It may look different on different
        platforms and this is intended.

        If "aliased" is true, the function will use aliases for
        various platforms that report system names which differ from
        their common names, e.g. SunOS will be reported as
        Solaris. The system_alias() function is used to implement
        this.

        Setting terse to true causes the function to return only the
        absolute minimum information needed to identify the platform.

    """
1180 1181 1182
    result = _platform_cache.get((aliased, terse), None)
    if result is not None:
        return result
1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236

    # Get uname information and then apply platform specific cosmetics
    # to it...
    system,node,release,version,machine,processor = uname()
    if machine == processor:
        processor = ''
    if aliased:
        system,release,version = system_alias(system,release,version)

    if system == 'Windows':
        # MS platforms
        rel,vers,csd,ptype = win32_ver(version)
        if terse:
            platform = _platform(system,release)
        else:
            platform = _platform(system,release,version,csd)

    elif system in ('Linux',):
        # Linux based systems
        distname,distversion,distid = dist('')
        if distname and not terse:
            platform = _platform(system,release,machine,processor,
                                 'with',
                                 distname,distversion,distid)
        else:
            # If the distribution name is unknown check for libc vs. glibc
            libcname,libcversion = libc_ver(sys.executable)
            platform = _platform(system,release,machine,processor,
                                 'with',
                                 libcname+libcversion)
    elif system == 'Java':
        # Java platforms
        r,v,vminfo,(os_name,os_version,os_arch) = java_ver()
        if terse:
            platform = _platform(system,release,version)
        else:
            platform = _platform(system,release,version,
                                 'on',
                                 os_name,os_version,os_arch)

    elif system == 'MacOS':
        # MacOS platforms
        if terse:
            platform = _platform(system,release)
        else:
            platform = _platform(system,release,machine)

    else:
        # Generic handler
        if terse:
            platform = _platform(system,release)
        else:
            bits,linkage = architecture(sys.executable)
            platform = _platform(system,release,machine,processor,bits,linkage)
Tim Peters's avatar
Tim Peters committed
1237

1238
    _platform_cache[(aliased, terse)] = platform
1239 1240 1241 1242 1243 1244
    return platform

### Command line interface

if __name__ == '__main__':
    # Default is to print the aliased verbose platform string
Tim Peters's avatar
Tim Peters committed
1245
    terse = ('terse' in sys.argv or '--terse' in sys.argv)
1246 1247 1248
    aliased = (not 'nonaliased' in sys.argv and not '--nonaliased' in sys.argv)
    print platform(aliased,terse)
    sys.exit(0)