From: Alexey Izbyshev <izbyshev@ispras.ru>
To: musl@lists.openwall.com
Subject: Re: [musl] Calling setxid() in a vfork()-child
Date: Tue, 13 Oct 2020 18:48:41 +0300 [thread overview]
Message-ID: <6a117703dd9798bbb86eeaa6955764a9@ispras.ru> (raw)
In-Reply-To: <emc2de2685-7f81-4fec-aac3-82d5d8f1a9e1@elzian>
On 2020-10-13 12:52, Laurent Bercot wrote:
> This is one of process state change operations that are lacking in
> posix_spawn(), along with being able to spawn the child as a session
> leader (despite being able to spawn it as a process group leader).
>
Thankfully, POSIX_SPAWN_SETSID was accepted into POSIX[1] and is
available in recent enough musl and glibc (and I also heard some rumors
about macOS).
But yes, even if we accept that simply setting some attributes for a new
process is enough (as opposed to running more complex logic requiring an
already created process, which is possible with fork()), having a fixed
of them for an evolving entity is problematic, more so since on Linux
posix_spawn() implementations are developed separately from the kernel.
[1] https://www.austingroupbugs.net/view.php?id=1044
next prev parent reply other threads:[~2020-10-13 15:48 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-12 9:27 Alexey Izbyshev
2020-10-12 14:55 ` Rich Felker
2020-10-12 20:30 ` Alexey Izbyshev
2020-10-13 2:47 ` Markus Wichmann
2020-10-13 9:52 ` Laurent Bercot
2020-10-13 15:48 ` Alexey Izbyshev [this message]
2020-10-13 15:24 ` Alexey Izbyshev
2020-10-13 16:07 ` Rich Felker
2020-10-13 16:52 ` Alexey Izbyshev
2020-10-13 17:05 ` Rich Felker
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