From: Eric Wong <normalperson@...>
Date: 2020-09-26T21:29:18+00:00
Subject: [ruby-core:100183] Re: [Ruby master Bug#15661] Disallow concurrent Dir.chdir with block

merch-redmine@jeremyevans.net wrote:
> Removing the block form breaks useful cases in single threaded
> code.

Agreed.

> Fixing it "properly" (by which I assume you mean
> separate pwd per thread) is impossible, as pwd is per-process,
> not per-thread.

openat(2) and the rest of the *at() functions are POSIX 200809,
so it could be possible to mimic per-thread working dirs if the
rest of File, IO, UNIXSocket, etc. were all made aware and used
*at() functions.

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