Move to here from ucs4-utf16.c.

[gnulib.git] / lib / canon-host.c

diff --git a/lib/canon-host.c b/lib/canon-host.c
index e2bd1a7..50ba67a 100644 (file)
--- a/lib/canon-host.c
+++ b/lib/canon-host.c
@@ -1,6 +1,6 @@
 /* Host name canonicalization
 
-   Copyright (C) 2005 Free Software Foundation, Inc.
+   Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
 
    Written by Derek Price <derek@ximbiot.com>.
 
@@ -18,14 +18,13 @@
    along with this program; if not, write to the Free Software Foundation,
    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
 
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
+#include <config.h>
 
 #include "canon-host.h"
 
+#include <string.h>
+
 #include "getaddrinfo.h"
-#include "strdup.h"
 
 /* Store the last error for the single-threaded version of this function.  */
 static int last_cherror;
@@ -71,7 +70,10 @@ canon_host_r (char const *host, int *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);