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From: John Spencer <maillist-musl@barfooze.de>
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Subject: Re: printf POSIX compliance
Date: Fri, 08 Jun 2012 18:46:36 +0200
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Cc: Szabolcs Nagy <nsz@port70.net>, rrt@sc3d.org
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On 06/08/2012 05:06 PM, Szabolcs Nagy wrote:
>
> i've just checked m4 and it uses freadseek and closein
>
> both functions are from gnulib and depend on freadahead
>
> so m4 will use freadahead independently of the printf issue
>
closein.c reads:

"
Most programs can get by with close_stdout.  close_stdin is only
needed when a program wants to guarantee that partially read input
from seekable stdin is not consumed, for any subsequent clients.
For example, POSIX requires that these two commands behave alike:
(sed -ne 1q; cat) < file
tail -n 1 file
"

this is bogus, according to Rich:
"all files are closed when a process terminates normally/calls exit.
  if you want to report write failures, just fflush(stdout) before exit 
and check the return value"

to make this stuff happening, they manipulate the libc-internal FILE 
struct, which is even more bogus.

gnulib is simply a huge pile of junk...