freeipa/util/ipa_hostname.h

/*
 * Copyright (C) 2020  FreeIPA Contributors see COPYING for license
 */

/* FQDN host name length including trailing NULL byte
 *
 * This may be longer than HOST_NAME_MAX. The hostname (effectively uname()'s
 * node name) is limited to 64 characters on Linux. ipa_gethostfqdn() returns
 * a FQDN from NSS which can be up to 255 octets including NULL byte.
 * Effectively the FQDN is 253 ASCII characters.
 */
#define IPA_HOST_FQDN_LEN 255

const char*
ipa_gethostfqdn(void);