[issue6236] os.popen causes illegal seek on AIX in Python 3.1rc

nestor added the comment: Fantastic. Applied the patch and it solved the problem with xlc 8.0 on AIX 5.3. -- ___ Python tracker ___ __

[issue6236] os.popen causes illegal seek on AIX in Python 3.1rc

Antoine Pitrou added the comment: Thanks for the patch! Committed in r75007, r75008, r75009, r75010. If there's any problem, please reopen. -- resolution: accepted -> fixed status: open -> closed versions: +Python 2.6, Python 2.7, Python 3.2 ___ Pyth

[issue6236] os.popen causes illegal seek on AIX in Python 3.1rc

Changes by Antoine Pitrou : -- resolution: -> accepted ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: http://m

[issue6236] os.popen causes illegal seek on AIX in Python 3.1rc

Changes by Sridhar Ratnakumar : -- nosy: +srid ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.pytho

[issue6236] os.popen causes illegal seek on AIX in Python 3.1rc

egreen added the comment: The problem is that the fileio struct in Modules/_io/fileio.c defines the 2-bit seekable field as int. >From the C99 standard, §6.7.2: for bit-fields, it is implementation-defined whether the specifier int designates the same type as signed int or the same type as unsi

[issue6236] os.popen causes illegal seek on AIX in Python 3.1rc

nestor added the comment: Python 3.1 (r31:73572, Jul 9 2009, 16:28:28) [C] on aix5 Type "help", "copyright", "credits" or "license" for more information. >>> >>> import sys >>> sys.stdout.seekable() True >>> I can access the machine only through ssh. -- __

[issue6236] os.popen causes illegal seek on AIX in Python 3.1rc

Amaury Forgeot d'Arc added the comment: /dev/tty is probably similar to stdout, at least when python is started without redirection. What is the output of >>> sys.stdout.seekable() when run from an interactive interpreter? Does it depend on the active console? (xterm, ssh...) -- nosy:

[issue6236] os.popen causes illegal seek on AIX in Python 3.1rc

Antoine Pitrou added the comment: Perhaps, although I don't know where /dev/tty would be involved in os.popen(). For reference, under Linux I get: >>> open("/dev/tty","a") Traceback (most recent call last): File "", line 1, in IOError: [Errno 29] Illegal seek -- ___

[issue6236] os.popen causes illegal seek on AIX in Python 3.1rc

nestor added the comment: Maybe this has something to do with it? Python 3.1 (r31:73572, Jul 9 2009, 16:28:28) [C] on aix5 Type "help", "copyright", "credits" or "license" for more information. >>> open("/dev/tty","a").seekable() True >>> -- ___ Py

[issue6236] os.popen causes illegal seek on AIX in Python 3.1rc

Antoine Pitrou added the comment: Ah, then I don't know what happens... -- ___ Python tracker ___ ___ Python-bugs-list mailing list Un

[issue6236] os.popen causes illegal seek on AIX in Python 3.1rc

nestor added the comment: That fails consistently: Python 2.6.2 (r262:71600, Jun 4 2009, 16:07:26) [C] on aix5 Type "help", "copyright", "credits" or "license" for more information. >>> import os >>> r,w=os.pipe() >>> os.lseek(r,0,1) Traceback (most recent call last): File "", line 1, in OSE

[issue6236] os.popen causes illegal seek on AIX in Python 3.1rc

Antoine Pitrou added the comment: Just before, could you try to type the following commands: >>> r, w = os.pipe() >>> os.lseek(r, 0, 1) -- ___ Python tracker ___ ___

[issue6236] os.popen causes illegal seek on AIX in Python 3.1rc

Antoine Pitrou added the comment: Here is my current interpretation: subprocess uses os.pipe() to create the file handles used for communication. These handles normally always raise an error ([Errno 29] Illegal seek) when trying to seek() on them, which the IO lib interprets as meaning the stre

[issue6236] os.popen causes illegal seek on AIX in Python 3.1rc

Antoine Pitrou added the comment: Ouch, this is quite annoying. I will try to fix this before the final release. -- assignee: -> pitrou nosy: +pitrou priority: -> critical ___ Python tracker _

[issue6236] os.popen causes illegal seek on AIX in Python 3.1rc

nestor added the comment: This quick and dirty fix in pydoc.py makes so it no longer aborts help. (less behaves somewhat strange for some commands but that is better than no help at all) def pipepager(text, cmd): """Page through text by feeding it to another program.""" import subproce

[issue6236] os.popen causes illegal seek on AIX in Python 3.1rc

New submission from nestor : Python 2.6.2 (r262:71600, Jun 4 2009, 16:07:26) [C] on aix5 Type "help", "copyright", "credits" or "license" for more information. >>> import os >>> os.popen('cat','w') Python 3.0.1 (r301:69556, Jun 4 2009, 16:07:22) [C] on aix5 Type "help", "copyright", "credit