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Tue Mar 2 13:25:16 EST 2010 · http://mail.python.org/pipermail/python-list/2010-March/720336.html

On 3/2/2010 9:24 AM, Albert Hopkins wrote:
> I have a snippet of code that looks like this:
>
>          pid, fd = os.forkpty()
>          if pid == 0:
>              subprocess.call(args)
>          else:
>              input = os.fdopen(fd).read()
>          ...
>
>
> This seems to work find for CPython 2.5 and 2.6 on my Linux system.

To get help, or report a bug, for something like this, be as specific as 
possible. 'Linux' may be too generic.

> However, with CPython 3.1 I get:
>
>              input = os.fdopen(fd).read()
>          IOError: [Errno 5] Input/output error
>
> Is there something wrong in Python 3.1?  Is this the correct way to do
> this (run a process in a pseudo-tty and read it's output) or is there
> another way I should/could be doing this?

No idea, however, the first thing I would do is call the .fdopen and 
.read methods separately (on separate lines) to isolate which is raising 
the error.

tjr

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os.fdopen() issue in Python 3.1?