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Replace use of select() by poll(). Fixes #798. #799

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Replace use of select() by poll(). Fixes #798. #799

wants to merge 1 commit into from

Commits on Dec 7, 2017

  1. Replace use of select() by poll(). Fixes NixOS#798. 

    `select()` only works with FD numbers <= 1023.

Since we have no explicit control over FD numbers,
`select()` can fail when there are many files open.

This commit uses `poll()` instead, which doesn't suffer
from this restriction.

`poll()` doesn't work on Windows, but that's not
a supported platform for Nixops anyway.
    @nh2
    nh2 committed Dec 7, 2017
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