1 /* Write a string to a file.
2 Copyright (C) 2017-2022 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 <fcntl.h>
20 #include <string.h>
21 #include <support/check.h>
22 #include <support/xunistd.h>
23
24 void
support_write_file_string(const char * path,const char * contents)25 support_write_file_string (const char *path, const char *contents)
26 {
27 int fd = xopen (path, O_CREAT | O_TRUNC | O_WRONLY, 0666);
28 const char *end = contents + strlen (contents);
29 for (const char *p = contents; p < end; )
30 {
31 ssize_t ret = write (fd, p, end - p);
32 if (ret < 0)
33 FAIL_EXIT1 ("cannot write to \"%s\": %m", path);
34 if (ret == 0)
35 FAIL_EXIT1 ("zero-length write to \"%s\"", path);
36 p += ret;
37 }
38 xclose (fd);
39 }
40