glibc/nss/valid_list_field.c

/* Copyright (C) 2015-2017 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
   <http://www.gnu.org/licenses/>.  */

#include <nss.h>
#include <stdbool.h>
#include <string.h>

static const char invalid_characters[] = NSS_INVALID_FIELD_CHARACTERS ",";

/* Check that all list members match the field syntax requirements and
   do not contain the character ','.  */
_Bool
__nss_valid_list_field (char **list)
{
  if (list == NULL)
    return true;
  for (; *list != NULL; ++list)
    if (strpbrk (*list, invalid_characters) != NULL)
      return false;
  return true;
}