/* write with error checking and retries.

   Copyright (C) 2016-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <support/xunistd.h>

#include <support/check.h>

void

xwrite (int fd, const void *buffer, size_t length)

{

  const char *p = buffer;

  const char *end = p + length;

  while (p < end)

    {

      ssize_t ret = write (fd, p, end - p);

      if (ret < 0)

        FAIL_EXIT1 ("write of %zu bytes failed after %td: %m",

                    length, p - (const char *) buffer);

      if (ret == 0)

        FAIL_EXIT1 ("write return 0 after writing %td bytes of %zu",

                    p - (const char *) buffer, length);

      p += ret;

    }

}