From mboxrd@z Thu Jan  1 00:00:00 1970
From: Florian Weimer <fweimer@redhat.com>
Subject: Re: extending wait4(2) or waitid(2) linux syscall
Date: Fri, 16 Nov 2018 14:40:49 +0100
Message-ID: <874lchrvha.fsf@oldenburg.str.redhat.com>
References: <20170420152051.568f2050.albert.aribaud@3adev.fr>
	<20181115140441.GA2171@altlinux.org>
	<CAK8P3a0Gsqa8WTbALOUchRyEA7E2f3P1f=XQ8nD2xQaemfPpcQ@mail.gmail.com>
	<20181115153008.GC2171@altlinux.org>
	<20181116124238.GT3505@e103592.cambridge.arm.com>
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In-Reply-To: <20181116124238.GT3505@e103592.cambridge.arm.com> (Dave Martin's
	message of "Fri, 16 Nov 2018 12:42:40 +0000")
To: Dave Martin <Dave.Martin@arm.com>
Cc: "Dmitry V. Levin" <ldv@altlinux.org>, Arnd Bergmann <arnd@arndb.de>, Albert ARIBAUD <albert.aribaud@3adev.fr>, "H. Peter Anvin" <hpa@zytor.com>, GNU C Library <libc-alpha@sourceware.org>, linux-api@vger.kernel.org
List-Id: linux-api@vger.kernel.org

* Dave Martin:

> The traditional way would be install a handler for SIGCHLD and
> do a sigsuspend()/pselect()/ppoll().  Then when the suspend() returns,
> you pump the status of any children with wait*(..., WNOHANG).
>
> Does that not work for you for some reason?

Changing signal handlers is not what a library should do because they
are process-global (not even thread-specific).

Thanks,
Florian