1  /* Write a string to a file.
       2     Copyright (C) 2017-2023 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
      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  }