From 030046a2a81213921d9ad61b102f63343a9a4e57 Mon Sep 17 00:00:00 2001
From: Jacob Nevins <jacobn@chiark.greenend.org.uk>
Date: Mon, 5 Jan 2009 01:01:58 +0000
Subject: [PATCH] Cope with a (non-standard) ENAMETOOLONG return from
 gethostname(); glibc will do this if the supplied buffer isn't big enough,
 which shouldn't lead to complete abandonment of X11 auth. (Would only have
 bitten with hostnames >255 chars anyway.)

[originally from svn r8383]
---
 unix/ux_x11.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/unix/ux_x11.c b/unix/ux_x11.c
index 0998069e..4126d5b7 100644
--- a/unix/ux_x11.c
+++ b/unix/ux_x11.c
@@ -6,6 +6,7 @@
 #include <unistd.h>
 #include <assert.h>
 #include <stdlib.h>
+#include <errno.h>
 
 #include "putty.h"
 #include "ssh.h"
@@ -40,7 +41,8 @@ void platform_get_x11_auth(struct X11Display *disp, const Config *cfg)
 	do {
 	    len *= 2;
 	    disp->hostname = snewn(len, char);
-	    if (gethostname(disp->hostname, len) < 0) {
+	    if ((gethostname(disp->hostname, len) < 0) &&
+		(errno != ENAMETOOLONG)) {
 		disp->hostname = NULL;
 		return;
 	    }