[Twisted-Python] Re: plus mode was Re: how winnt fileops workand what to do about it
exarkun at divmod.com
Sat Dec 31 18:46:35 EST 2005
On Sat, 31 Dec 2005 18:12:06 -0500, James Y Knight <foom at fuhm.net> wrote:
>On Dec 31, 2005, at 4:57 PM, Paul G wrote:
>>oh, it makes perfect sense to have a workaround in twisted, i'm not
>>suggesting otherwise. however, it should be just that - a temporary
>>workaround until cpython has a fix for the issue, because (outside of the
>>offending libc implementation), that is the right place to fix it.
>As I wrote in the bug report:
>>It's not a python bug except perhaps that python should raise an
>>Doing a read and write without a seek in between is illegal in C.
>>"ANSI C requires that a file positioning function intervene between output
>>input, unless an input operation encounters end-of-file."
>I am against including any sort of workaround besides raising an exception
>if the situation occurs. And I don't think even that is particularly
Thanks for pointing this out. The immediate fix is now obvious: the test needs to change. It _might_ be nice to have an assertion for this behavior, but I'm not about to add a file wrapper just for this (if all of Twisted used FilePath, instead of opening files directly, I might grant more weight to this, but since it doesn't...).
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