Re: sysdeps/posix/{pread64,pwrite64}.c

[Ulrich Drepper <drepper at cygnus dot com>]

Roland McGrath <roland@frob.com> writes:

> Firstly, sysdeps/posix is for functions implemented in terms of POSIX entry
> points.  lseek64 is not a POSIX entry point, so a function using it has no
> business residing in sysdeps/posix.  

First, the LFS proposal will probably be adopted for the next revision
of the Unix standards and since it'll be merged with POSIX the latter
will also have it.

Second, I see this rather as POSIX-like function should be used.
POSIX does not demand that all of the functions it includes are
defined on all systems and therefore you cannot write functions in
sysdeps/posix as if all interfaces are available.

> I think it is dangerously misleading to provide an incorrect
> implementation instead of none at all.

I don't see a danger here.  If you have a system with threads you
better have a pread syscall (or equivalent).  If you don't have
threads the replacement is not too bad.  If you really want to see
this removed I wouldn't object strongly but so far I have no seen a
convincing argument.

-- 
---------------.      drepper at gnu.org  ,-.   1325 Chesapeake Terrace
Ulrich Drepper  \    ,-------------------'   \  Sunnyvale, CA 94089 USA
Cygnus Solutions `--' drepper at cygnus.com   `------------------------