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Test Your Knowledge in Computers #911
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In C, we can get the address of a variable as follows: pointer = &variable;
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KRB5_SET_DEFAULT_REALM(3)				   BSD Library Functions Manual 				 KRB5_SET_DEFAULT_REALM(3)

krb5_copy_host_realm, krb5_free_host_realm, krb5_get_default_realm, krb5_get_default_realms, krb5_get_host_realm, krb5_set_default_realm -- default and host realm read and manipulation routines LIBRARY
Kerberos 5 Library (libkrb5, -lkrb5) SYNOPSIS
#include <krb5.h> krb5_error_code krb5_copy_host_realm(krb5_context context, const krb5_realm *from, krb5_realm **to); krb5_error_code krb5_free_host_realm(krb5_context context, krb5_realm *realmlist); krb5_error_code krb5_get_default_realm(krb5_context context, krb5_realm *realm); krb5_error_code krb5_get_default_realms(krb5_context context, krb5_realm **realm); krb5_error_code krb5_get_host_realm(krb5_context context, const char *host, krb5_realm **realms); krb5_error_code krb5_set_default_realm(krb5_context context, const char *realm); DESCRIPTION
krb5_copy_host_realm() copies the list of realms from from to to. to should be freed by the caller using krb5_free_host_realm. krb5_free_host_realm() frees all memory allocated by realmlist. krb5_get_default_realm() returns the first default realm for this host. The realm returned should be freed with free(). krb5_get_default_realms() returns a NULL terminated list of default realms for this context. Realms returned by krb5_get_default_realms() should be freed with krb5_free_host_realm(). krb5_get_host_realm() returns a NULL terminated list of realms for host by looking up the information in the [domain_realm] in krb5.conf or in DNS. If the mapping in [domain_realm] results in the string dns_locate, DNS is used to lookup the realm. When using DNS to a resolve the domain for the host a.b.c, krb5_get_host_realm() looks for a TXT resource record named _kerberos.a.b.c, and if not found, it strips off the first component and tries a again (_kerberos.b.c) until it reaches the root. If there is no configuration or DNS information found, krb5_get_host_realm() assumes it can use the domain part of the host to form a realm. Caller must free realmlist with krb5_free_host_realm(). krb5_set_default_realm() sets the default realm for the context. If NULL is used as a realm, the [libdefaults]default_realm stanza in krb5.conf is used. If there is no such stanza in the configuration file, the krb5_get_host_realm() function is used to form a default realm. SEE ALSO
free(3), krb5.conf(5) HEIMDAL
April 24, 2005 HEIMDAL

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