[Patches] [ python-Patches-671384 ] test_pty hanging on hpux11

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Patches item #671384, was opened at 2003-01-20 16:23
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Category: Modules
Group: Python 2.3
Status: Open
Resolution: None
Priority: 5
Submitted By: Neal Norwitz (nnorwitz)
>Assigned to: Martin v. Löwis (loewis)
Summary: test_pty hanging on hpux11

Initial Comment:
The attached hack fixes a problem which occurs since
switching the pty code.  isatty() hangs if the slave_fd
is closed and reopened as in the deprecated APIs
pty.master_open() and pty.slave_open().

This patch reverts to the old behaviour where
_open_terminal() is called in master_open() to avoid
the hang later.

Here's a very simple test for the problem:

import pty, os

master_fd, slave_name = pty.master_open()
slave_fd = pty.slave_open(slave_name)
print os.isatty(slave_fd)

In slave_open() the first ioctl raises an IOError,
Invalid Argument 22.

I don't know if this problem affects hpux10.  Hopefully
someone will have a better idea how to really fix this
problem.

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>Comment By: Neal Norwitz (nnorwitz)
Date: 2003-01-27 19:21

Message:
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I have attached an updated patch.  It seems Solaris 8 (on
the snake farm) also had a test failure.  I have basically
restored the old functionality in this patch. 
_open_terminal is called if /dev/ptmx exists, so
os.openpty() is not called.  This fixes the test
failures/hangs on both solaris and hpux and should be
equivalent to the 2.2 behaviour.

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