[Bug libc/9813] pselect implementation (when not implemneted by the kernel) agriviates the race

["mtk.manpages at gmail dot com" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=9813

Michael Kerrisk <mtk.manpages at gmail dot com> changed:

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--- Comment #4 from Michael Kerrisk <mtk.manpages at gmail dot com> 2012-02-19 22:06:49 UTC ---
Shachar, I suspect that it's not worth trying to make the fix you suggest. The
fix will only appear in modern glibc, and any modern system will have a
kernel-supported. The fundamental problem can't be remedied: the idea to add a
userspace implementation of pselect() was extremely muddleheaded, and worsens
portability problems for applications. The portability question goes from being
"do I have pselect() or not?" to "do I have a pselect() or not, and if I do, is
it one that works?"; the last part of the second question can only be verified
with a check of the kernel (and glibc) versions.

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