Mercurial > traipse_dev
diff platform.py @ 0:4385a7d0efd1 grumpy-goblin
Deleted and repushed it with the 'grumpy-goblin' branch. I forgot a y
| author | sirebral |
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| date | Tue, 14 Jul 2009 16:41:58 -0500 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/platform.py Tue Jul 14 16:41:58 2009 -0500 @@ -0,0 +1,1217 @@ +#!/usr/local/bin/python + +""" 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 useable as part of a filename. + + Note that this module is a fast moving target. I plan to release + version 1.0 as the final version. + + 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 + + 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 + + History: + 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 'unkown' in all + return values (the system uname command tends to return + 'unkown' 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 (c) 1999-2000, Marc-Andre Lemburg; mailto:mal@lemburg.com + Copyright (c) 2000-2001, 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__ = '0.8.0' + +import sys,string,os,re + +### Platform specific APIs + +def libc_ver(executable=sys.executable,lib='',version='', + + chunksize=2048, + libc_search=re.compile('(__libc_init)' + '|' + '(GLIBC_([0-9.]+))' + '|' + '(libc(_\w+)?\.so(?:\.(\d[0-9.]*))?)' + ) + ): + + """ Tries to determine the libc version against which the + file executable (defaults to the Python interpreter) is linked. + + 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 is probably only + useable for executables compiled using gcc. + + The file is read and scanned in chunks of chunksize bytes. + + """ + f = open(executable,'rb') + binary = f.read(chunksize) + pos = 0 + while 1: + m = libc_search.search(binary,pos) + 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): + + """ Tries some special tricks to get the distribution + 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') + for n in range(len(verfiles)-1, -1, -1): + 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 + +def dist(distname='',version='',id='', + + supported_dists=('SuSE','debian','redhat','mandrake'), + release_filename=re.compile('(\w+)[-_](release|version)'), + release_version=re.compile('([\d.]+)[^(]*(?:\((.+)\))?')): + + """ Tries to determine the name of the OS distribution name + + 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. + + Returns a tuple distname,version,id which default to the + 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: + m = release_filename.match(file) + 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() + m = release_version.search(firstline) + 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. + + XXX 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=''): + + """ Normalize the version and build strings and return a sinlge + 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 + +def _syscmd_ver(system='',release='',version='', + + supported_platforms=('win32','win16','dos','os2'), + ver_output=re.compile('(?:([\w ]+) ([\w.]+) ' + '.*' + 'Version ([\d.]+))')): + + """ 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 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) + m = ver_output.match(info) + 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). + + Note: this functions only works if Mark Hammond's win32 + 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 ? + + Adapted from code posted by Karl Putland to comp.lang.python. + + """ + # 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' + else: + release = '98' + 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: + release = '2000' + 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 + + # 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 + l = [] + append = l.append + for selector in selectors: + try: + append(gestalt(selector)) + except RuntimeError: + 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). + + Entries which cannot be determined are set to ''. All tuple + entries are strings. + + 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 + 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 = (sysu & 0xFF000000) >> 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: + machine = {0x1: '68k', + 0x2: 'PowerPC'}.get(sysa,'') + return release,versioninfo,machine + +def _java_getprop(self,name,default): + + from java.lang import System + try: + return System.getProperty(name) + except: + return default + +def java_ver(release='',vendor='',vminfo=('','',''),osinfo=('','','')): + + """ Version interface for JPython. + + 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 + + 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 'unkown' 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'), +} + +def architecture(executable=sys.executable,bits='',linkage='', + + split=re.compile('[\s,]').split): + + """ Queries the given executable (defaults to the Python interpreter + binary) for various architecture informations. + + Returns a tuple (bits,linkage) which contain 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 and then only if the + executable points to the Python interpreter defaults from + _default_architecture are used. + + """ + # 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' + + # 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 + # some sensible defaults then... + 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 + fileout = split(output)[1:] + + 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 + +_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 + possible processor information as additional tuple entry. + + 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 + + # Try the 'ver' system command available on some + # platforms + if use_syscmd_ver: + system,release,version = _syscmd_ver(system) + + # 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','') + + # 'unkown' 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(): + + """ Returns the computer's network name (may not be fully qualified !) + + 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('([\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 + import sys, re, time + + 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_build(): + + """ Returns a tuple (buildno, buildate) 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 :-) + +_platform_cache = None +_platform_aliased_cache = None + +def platform(aliased=0, terse=0): + + """ Returns a single string identifying the underlying platform + with as much useful information as possible (but no more :). + + 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. + + """ + global _platform_cache,_platform_aliased_cache + + if not aliased and (_platform_cache is not None): + return _platform_cache + elif _platform_aliased_cache is not None: + return _platform_aliased_cache + + # 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) + + if aliased: + _platform_aliased_cache = platform + elif terse: + pass + else: + _platform_cache = platform + return platform + +if __name__ == '__main__': + # Default is to print the aliased verbose platform string + terse = ('terse' in sys.argv or '--terse' in sys.argv) + aliased = (not 'nonaliased' in sys.argv and not '--nonaliased' in sys.argv) + print platform(aliased,terse) + sys.exit(0)