* ext/socket/socket.c (sock_gethostname): Use NI_MAXHOST to support

hostnames longer than 64 characters if the system supports it.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46935 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Fri Jul 25 13:18:00 2014  Will Farrington  <wfarrington@digitalocean.com>
+
+	* ext/socket/socket.c (sock_gethostname): Use NI_MAXHOST to support
+	  hostnames longer than 64 characters if the system supports it.
+
 Fri Jul 25 12:21:11 2014  Santiago Pastorino  <santiago@wyeworks.com>
 
 	* compile.c (defined_expr): make the condition if the receiver

ext/socket/socket.c

@@ -1023,10 +1023,15 @@ sock_sysaccept(VALUE sock)
 static VALUE
 sock_gethostname(VALUE obj)
 {
-#ifndef HOST_NAME_MAX
-#  define HOST_NAME_MAX 1024
+#if defined(NI_MAXHOST)
+#  define RUBY_MAX_HOST_NAME_LEN NI_MAXHOST
+#elif defined(HOST_NAME_MAX)
+#  define RUBY_MAX_HOST_NAME_LEN HOST_NAME_MAX
+#else
+#  define RUBY_MAX_HOST_NAME_LEN 1024
 #endif
-    char buf[HOST_NAME_MAX+1];
+
+    char buf[RUBY_MAX_HOST_NAME_LEN+1];
 
     rb_secure(3);
     if (gethostname(buf, (int)sizeof buf - 1) < 0)