Re: POSIX requires checking all *printf return values?!?

[Eric Blake]

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According to Jim Meyering on 10/19/2007 11:30 AM:
>> Is it worth changing
>> POSIX to require ferror() to be reliably set?  Or is it at least worth
> 
> How about *allowing* ferror to be reliably set?

Which brings up another issue (although it is too late to get this into
the next revision of POSIX) - it would be really nice to have an fseterr()
function.  Here's part of what gnulib had to do in order to write a
POSIX-compliant wrapper around fprintf for broken platforms:

http://git.sv.gnu.org/gitweb/?p=gnulib.git;a=blob;f=lib/fseterr.c;h=4ca0a34;hb=78da34d

It breaks into the opaque FILE* on platforms where this is possible, but
otherwise, is stuck using a six-syscall workaround just to force a stream
to set its ferror() flag.

- --
Don't work too hard, make some time for fun as well!

Eric Blake             address@hidden
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