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Date: Thu, 18 Aug 2022 17:54:50 +0300
From: Alexey Izbyshev <izbyshev@...ras.ru>
To: musl@...ts.openwall.com
Cc: Guilherme Janczak <guilherme.janczak@...dex.com>
Subject: Re: [PATCH] add close_range() syscall wrapper
On 2022-08-18 17:42, James Y Knight wrote:
> On Thu, Aug 18, 2022 at 6:40 AM Alexey Izbyshev <izbyshev@...ras.ru>
> wrote:
>
>> Glibc doesn't implement a fallback and explicitly says it in the
>> manual.
>> Using a different implementation in musl seems undesirable.
>
> True. I would note, however, that glibc also implements another
> function "closefrom", which first calls close_range, and if it fails,
> falls back to iterating /proc/self/fd.
Yes, but glibc's closefrom() *aborts* if there is no /proc, so it's not
suitable for all use cases (and would not be suitable for CPython's
subprocess or "os.closerange()", for instance).
Alexey
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