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Date: Sat, 26 Sep 2020 21:29:18 +0000
From: Eric Wong <normalperson@yhbt.net>
To: ruby-core@ruby-lang.org
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References: <redmine.issue-15661.20190313121953.286@ruby-lang.org>
 <redmine.journal-87754.20200926212027.286@ruby-lang.org>
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Subject: [ruby-core:100183] Re: [Ruby master Bug#15661] Disallow concurrent
 Dir.chdir with block
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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.