/* Generic implementation of fget*ent_r.

   Copyright (C) 2020 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

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

#include <errno.h>

#include <nss_files.h>

int

__nss_fgetent_r (FILE *fp, void *result, char *buffer, size_t buffer_length,

                 nss_files_parse_line parser)

{

  int ret;

  _IO_flockfile (fp);

  while (true)

    {

      off64_t original_offset;

      ret = __nss_readline (fp, buffer, buffer_length, &original_offset);

      if (ret == 0)

        {

          /* Parse the line into *RESULT.  */

          ret = parser (buffer, result,

                        (struct parser_data *) buffer, buffer_length, &errno);

          /* Translate the result code from the parser into an errno

             value.  Also seeks back to the start of the line if

             necessary.  */

          ret = __nss_parse_line_result (fp, original_offset, ret);

          if (ret == EINVAL)

            /* Skip over malformed lines.  */

            continue;

        }

      break;

    }

  _IO_funlockfile (fp);

  return ret;

}