view tests/test-vdprintf.c @ 40212:8da9577294da

unistr/*, uniconv/*: Fix undefined behaviour. Reported by Jeffrey Walton <noloader@gmail.com>. * lib/unistr/u-cpy.h (FUNC): Don't invoke memcpy with a zero size. * lib/unistr/u-cpy-alloc.h (FUNC): Likewise. * lib/uniconv/u8-conv-from-enc.c (u8_conv_from_encoding): Likewise. * lib/uniconv/u8-conv-to-enc.c (u8_conv_to_encoding): Likewise.
author Bruno Haible <bruno@clisp.org>
date Sat, 09 Mar 2019 00:01:47 +0100
parents b06060465f09
children
line wrap: on
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/* Test of vdprintf() function.
   Copyright (C) 2011-2019 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */

#include <config.h>

#include <stdio.h>

#include "signature.h"
SIGNATURE_CHECK (vdprintf, int, (int, const char *, va_list));

#include <errno.h>
#include <unistd.h>

#include "macros.h"

static int
my_dprintf (int fd, const char *format, ...)
{
  va_list args;
  int ret;

  va_start (args, format);
  ret = vdprintf (fd, format, args);
  va_end (args);
  return ret;
}

int
main (int argc, char *argv[])
{
  /* Test behaviour for invalid file descriptors.  */
  {
    errno = 0;
    ASSERT (my_dprintf (-1, "test") == -1);
    ASSERT (errno == EBADF);
  }
  {
    close (99);
    errno = 0;
    ASSERT (my_dprintf (99, "test") == -1);
    ASSERT (errno == EBADF);
  }

  return 0;
}