ref: 5ac3a0d4c1a9d7e4d3912c4770084b885007aca6
dir: /src/libc/stdio/fflush.c/
#include <stdio.h>
#include "../libc.h"
#undef fflush
int
fflush(FILE *fp)
{
int err;
if (fp)
return _flsbuf(fp);
err = 0;
for (fp = __iob; fp < &__iob[FOPEN_MAX]; ++fp) {
if ((fp->flags & _IOWRITE) != 0 && _flsbuf(fp))
err = EOF;
}
return err;
}