/* Host name canonicalization
- Copyright (C) 2005 Free Software Foundation, Inc.
+ Copyright (C) 2005-2013 Free Software Foundation, Inc.
Written by Derek Price <derek@ximbiot.com>.
- This program is free software; you can redistribute it and/or
- modify it under the terms of the GNU General Public License as
- published by the Free Software Foundation; either version 2, or (at
- your option) any later version.
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3, or (at your option)
+ any later version.
- This program 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
- General Public License for more details.
+ This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software Foundation,
- Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
+#include <config.h>
#include "canon-host.h"
-#include "getaddrinfo.h"
-#include "strdup.h"
+#include <string.h>
+#include <netdb.h>
/* Store the last error for the single-threaded version of this function. */
static int last_cherror;
status = getaddrinfo (host, NULL, &hints, &res);
if (!status)
{
- retval = strdup (res->ai_canonname);
+ /* http://lists.gnu.org/archive/html/bug-coreutils/2006-09/msg00300.html
+ says Darwin 7.9.0 getaddrinfo returns 0 but sets
+ res->ai_canonname to NULL. */
+ retval = strdup (res->ai_canonname ? res->ai_canonname : host);
+ if (!retval && cherror)
+ *cherror = EAI_MEMORY;
freeaddrinfo (res);
}
else if (cherror)