1/* write with error checking and retries.
2 Copyright (C) 2016-2020 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <support/xunistd.h>
20
21#include <support/check.h>
22
23void
24xwrite (int fd, const void *buffer, size_t length)
25{
26 const char *p = buffer;
27 const char *end = p + length;
28 while (p < end)
29 {
30 ssize_t ret = write (fd, p, end - p);
31 if (ret < 0)
32 FAIL_EXIT1 ("write of %zu bytes failed after %td: %m",
33 length, p - (const char *) buffer);
34 if (ret == 0)
35 FAIL_EXIT1 ("write return 0 after writing %td bytes of %zu",
36 p - (const char *) buffer, length);
37 p += ret;
38 }
39}
40