glibc/libio/tst-setvbuf1.c

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/* Derived from the test case in BZ #2337. */
#include <errno.h>
#include <error.h>
#include <fcntl.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <wchar.h>
static char buf[512] __attribute__ ((aligned (4096)));
static int
do_test (void)
{
setlocale (LC_ALL, "de_DE.UTF-8");
FILE *fp = fdopen (dup (STDOUT_FILENO), "a");
if (fp == NULL)
error (EXIT_FAILURE, errno, "fdopen(,\"a\")");
setvbuf (fp, buf, _IOFBF, sizeof (buf));
/* fwprintf to unbuffered stream. */
fwprintf (fp, L"hello.\n");
fclose (fp);
/* touch my buffer */
buf[45] = 'a';
return 0;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"