lib/krb5/copy_host_realm.c

   1 /*
   2  * Copyright (c) 1999 - 2001 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include "krb5_locl.h"
  35
  36 RCSID("$Id$");
  37
  38 /**
  39  * Copy the list of realms from `from' to `to'.
  40  *
  41  * @param context Kerberos 5 context.
  42  * @param from list of realms to copy from.
  43  * @param to list of realms to copy to, free list of krb5_free_host_realm().
  44  *
  45  * @return Returns 0 to indicate success. Otherwise an kerberos et
  46  * error code is returned, see krb5_get_error_message().
  47  *
  48  * @ingroup krb5
  49  */
  50
  51 krb5_error_code KRB5_LIB_FUNCTION
  52 krb5_copy_host_realm(krb5_context context,
  53                      const krb5_realm *from,
  54                      krb5_realm **to)
  55 {
  56     unsigned int n, i;
  57     const krb5_realm *p;
  58
  59     for (n = 1, p = from; *p != NULL; ++p)
  60         ++n;
  61
  62     *to = calloc (n, sizeof(**to));
  63     if (*to == NULL) {
  64         krb5_set_error_string (context, "malloc: out of memory");
  65         return ENOMEM;
  66     }
  67
  68     for (i = 0, p = from; *p != NULL; ++p, ++i) {
  69         (*to)[i] = strdup(*p);
  70         if ((*to)[i] == NULL) {
  71             krb5_free_host_realm (context, *to);
  72             krb5_set_error_string (context, "malloc: out of memory");
  73             return ENOMEM;
  74         }
  75     }
  76     return 0;
  77 }