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 /**
37  * Copy the list of realms from `from' to `to'.
38  *
39  * @param context Kerberos 5 context.
40  * @param from list of realms to copy from.
41  * @param to list of realms to copy to, free list of krb5_free_host_realm().
42  *
43  * @return Returns 0 to indicate success. Otherwise an kerberos et
44  * error code is returned, see krb5_get_error_message().
45  *
46  * @ingroup krb5
47  */
48 
49 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
50 krb5_copy_host_realm(krb5_context context,
51 		     const krb5_realm *from,
52 		     krb5_realm **to)
53 {
54     unsigned int n, i;
55     const krb5_realm *p;
56 
57     for (n = 1, p = from; *p != NULL; ++p)
58 	++n;
59 
60     *to = calloc (n, sizeof(**to));
61     if (*to == NULL) {
62 	krb5_set_error_message (context, ENOMEM,
63 				N_("malloc: out of memory", ""));
64 	return ENOMEM;
65     }
66 
67     for (i = 0, p = from; *p != NULL; ++p, ++i) {
68 	(*to)[i] = strdup(*p);
69 	if ((*to)[i] == NULL) {
70 	    krb5_free_host_realm (context, *to);
71 	    krb5_set_error_message (context, ENOMEM,
72 				    N_("malloc: out of memory", ""));
73 	    return ENOMEM;
74 	}
75     }
76     return 0;
77 }
78