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RE: Official Linux system wrapper library?
- From: David Laight <David dot Laight at ACULAB dot COM>
- To: 'David Newall' <glibc at davidnewall dot com>, Florian Weimer <fweimer at redhat dot com>, Daniel Colascione <dancol at google dot com>
- Cc: "Michael Kerrisk (man-pages)" <mtk dot manpages at gmail dot com>, linux-kernel <linux-kernel at vger dot kernel dot org>, Joel Fernandes <joelaf at google dot com>, Linux API <linux-api at vger dot kernel dot org>, Willy Tarreau <w at 1wt dot eu>, Vlastimil Babka <vbabka at suse dot cz>, Carlos O'Donell <carlos at redhat dot com>, "libc-alpha at sourceware dot org" <libc-alpha at sourceware dot org>
- Date: Wed, 28 Nov 2018 13:18:53 +0000
- Subject: RE: Official Linux system wrapper library?
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From: David Newall
> Sent: 23 November 2018 14:11
> On 24/11/18 12:04 am, Florian Weimer wrote:
> > But socketcall does not exist on all architectures. Neither does
> > getpid, it's called getxpid on some architectures.
> > ...
> > I think it would be a poor approach to expose application developers to
> > these portability issues. We need to abstract over these differences at
> > a certain layer, and applications are too late.
> Interesting. I think the opposite. I think exposing the OS's
> interfaces is exactly what a c-library should do. It might also provide
> alternative interfaces that work consistently across different
> platforms, but in addition to, not instead of the OS interface.
Also, it really shouldn't implement broken workarounds for 'missing'
At least one C library I've met converted pread() into lseek() and read().
That is just so broken it is better to fail to link or fail at runtime.
Never mind all the fun trying to read CLOCK_MONOTONIC.
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