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/* write with error checking and retries.
Copyright (C) 2016 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 %zd: %m",
length, p - (const char *) buffer);
if (ret == 0)
FAIL_EXIT1 ("write return 0 after writing %zd bytes of %zu",
p - (const char *) buffer, length);
p += ret;
}
}
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