1  /* Copyright (C) 2015-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <nss.h>
      19  #include <stdbool.h>
      20  #include <string.h>
      21  
      22  static const char invalid_characters[] = NSS_INVALID_FIELD_CHARACTERS ",";
      23  
      24  /* Check that all list members match the field syntax requirements and
      25     do not contain the character ','.  */
      26  _Bool
      27  __nss_valid_list_field (char **list)
      28  {
      29    if (list == NULL)
      30      return true;
      31    for (; *list != NULL; ++list)
      32      if (strpbrk (*list, invalid_characters) != NULL)
      33        return false;
      34    return true;
      35  }