[PATCH] fix fgetwc() from unbuffered file (RH bug 457506)

[Denys Vlasenko]

On Wed, 2008-08-27 at 12:13 +0200, Denys Vlasenko wrote:
> Hi,
> 
> This is a fix for this RH bug:
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=457506
> 
> Testcase:
> 
> #include <stdio.h>
> #include <locale.h>
> #include <wchar.h>
> int main(void)
> {
>     wint_t c;
>     setlocale(LC_ALL, "en_US.utf8");
>     setvbuf(stdin, NULL, _IONBF, 0);
>     while ((c = fgetwc(stdin)) != WEOF) {
>         fputwc(c, stdout);
>         fflush(stdout);
>     }
>     if (ferror(stdin))
>         perror(NULL);
> }
> 
> # cat zz.txt
> qwerty
> йцукен
> 
> # LD_LIBRARY_PATH=. ./a.out <zz.txt
> qwerty
> йцукен  <--- without patch, this is not printed!
> 

Oops.. forgot the patch itself :(
Please find attached.


for Changelog:

2008-08-27  Denys Vlasenko  <dvlasenk@redhat.com>

	* libio/wfileops.c (_IO_wfile_underflow): Use local small
	buffer if input file is unbuffered.

--
vda

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