stdio/FreeBSD/fflush.c.patch

   1 --- fflush.c.bsdnew     2009-11-11 13:33:04.000000000 -0800
   2 +++ fflush.c    2009-11-11 13:33:04.000000000 -0800
   3 @@ -39,6 +39,7 @@ __FBSDID("$FreeBSD: src/lib/libc/stdio/f
   4  #include "namespace.h"
   5  #include <errno.h>
   6  #include <stdio.h>
   7 +#include <string.h>
   8  #include "un-namespace.h"
   9  #include "libc_private.h"
  10  #include "local.h"
  11 @@ -122,6 +123,14 @@ __sflush(FILE *fp)
  12         for (; n > 0; n -= t, p += t) {
  13                 t = _swrite(fp, (char *)p, n);
  14                 if (t <= 0) {
  15 +                       /* 5340694: reset _p and _w on EAGAIN */
  16 +                       if (t < 0 && errno == EAGAIN) {
  17 +                               if (p > fp->_p) /* some was written */
  18 +                                       memmove(fp->_p, p, n);
  19 +                               fp->_p += n;
  20 +                               if (!(fp->_flags & (__SLBF|__SNBF)))
  21 +                                       fp->_w -= n;
  22 +                       }
  23                         fp->_flags |= __SERR;
  24                         return (EOF);
  25                 }