X-Git-Url: https://git.distorted.org.uk/u/mdw/putty/blobdiff_plain/8def70c3ec6f81f95673c0de67a75b5a6b2e9e1c..d9e0300f903aa7cfb85a94480ad544082a7a6c35:/unix/ux_x11.c

diff --git a/unix/ux_x11.c b/unix/ux_x11.c
index 0998069e..5794d315 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"
@@ -36,11 +37,14 @@ void platform_get_x11_auth(struct X11Display *disp, const Config *cfg)
 	int len;
 
 	sfree(disp->hostname);
+	disp->hostname = NULL;
 	len = 128;
 	do {
 	    len *= 2;
-	    disp->hostname = snewn(len, char);
-	    if (gethostname(disp->hostname, len) < 0) {
+	    disp->hostname = sresize(disp->hostname, len, char);
+	    if ((gethostname(disp->hostname, len) < 0) &&
+		(errno != ENAMETOOLONG)) {
+		sfree(disp->hostname);
 		disp->hostname = NULL;
 		return;
 	    }