Jython

On Linux:

Jython 2.5.0+ (trunk:6698, Aug 20 2009, 23:03:24)
[Java HotSpot(TM) Client VM (Sun Microsystems Inc.)] on java1.5.0_18
Type "help", "copyright", "credits" or "license" for more information.
>>> import os
>>> os.path.samestat
<function samestat at 0x1>

On a POSIX platform (HP NonStop OSS, os.name="NONSTOP_KERNEL"):

Jython 2.5.0 (Release_2_5_0:6476, Jun 16 2009, 13:33:26)
[Java HotSpot(TM) Server VM (Hewlett-Packard Company)] on java1.5.0_02
Type "help", "copyright", "credits" or "license" for more information.
>>> import os
>>> os.path.samestat
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: 'module' object has no attribute 'samestat'

What determines whether samestat is defined? Why would it be present on one Unix-like platform and not another?

Thanks.

PJDM
--
Peter Mayne
Hewlett-Packard
Canberra, ACT, Australia

Re: [Jython-users] Presence of os.path.samestat on POSIX platforms From: Philip Jenvey <pjenvey@un...> - 2009-08-26 23:21 On Aug 26, 2009, at 6:45 AM, Mayne, Peter wrote: > On Linux: > > Jython 2.5.0+ (trunk:6698, Aug 20 2009, 23:03:24) > [Java HotSpot(TM) Client VM (Sun Microsystems Inc.)] on java1.5.0_18 > Type "help", "copyright", "credits" or "license" for more information. > >>> import os > >>> os.path.samestat > <function samestat at 0x1> > > On a POSIX platform (HP NonStop OSS, os.name=”NONSTOP_KERNEL”): > > Jython 2.5.0 (Release_2_5_0:6476, Jun 16 2009, 13:33:26) > [Java HotSpot(TM) Server VM (Hewlett-Packard Company)] on java1.5.0_02 > Type "help", "copyright", "credits" or "license" for more information. > >>> import os > >>> os.path.samestat > Traceback (most recent call last): > File "<stdin>", line 1, in <module> > AttributeError: 'module' object has no attribute 'samestat' > > What determines whether samestat is defined? Why would it be present > on one Unix-like platform and not another? samestat relies on a full implementation of os.stat, which we're unable to provide in pure Java. We workaround this by using the jna- posix library to call down into libc's stat. Full jna-posix support is currently limited to the platforms the underlying jna FFI library supports, which don't include any HP unix at this point. See https://jna.dev.java.net/#building for directions on how to build the JNA native bits for your platform -- Philip Jenvey

Re: [Jython-users] Presence of os.path.samestat on POSIX platforms From: Mayne, Peter <peter.mayne@hp...> - 2009-08-27 08:41 Good explanation. It's HP, but it's not Unix. The end result is the same, though. In the absence of a native JNA build, is there a list of Jython dependencies on JNA, so I can anticipate problems? Thanks. PJDM -- Peter Mayne Hewlett-Packard Canberra, ACT, Australia -----Original Message----- From: Philip Jenvey [mailto:pjenvey@...] Sent: Thursday, 27 August 2009 9:21 AM To: Mayne, Peter Cc: jython-users@... Subject: Re: [Jython-users] Presence of os.path.samestat on POSIX platforms > What determines whether samestat is defined? Why would it be present > on one Unix-like platform and not another? samestat relies on a full implementation of os.stat, which we're unable to provide in pure Java. We workaround this by using the jna- posix library to call down into libc's stat. Full jna-posix support is currently limited to the platforms the underlying jna FFI library supports, which don't include any HP unix at this point. See https://jna.dev.java.net/#building for directions on how to build the JNA native bits for your platform -- Philip Jenvey

Re: [Jython-users] Presence of os.path.samestat on POSIX platforms From: Philip Jenvey <pjenvey@un...> - 2009-08-28 03:42 On Aug 27, 2009, at 1:40 AM, Mayne, Peter wrote: > Good explanation. It's HP, but it's not Unix. The end result is the > same, though. > > In the absence of a native JNA build, is there a list of Jython > dependencies on JNA, so I can anticipate problems? We don't have a formal list anywhere, but there's just a hand full of functions hidden in the os and os.path (posixpath) modules. grep for _native_posix in Lib/ to find them -- Philip Jenvey

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