From dc7daa550af74277b10e8025d836fd5da48513f6 Mon Sep 17 00:00:00 2001
From: Albert Strasheim <fullung@gmail.com>
Date: Sun, 7 Apr 2013 11:16:15 -0700
Subject: [PATCH] lib9: handle empty TMPDIR more gracefully.

Before, an empty TMPDIR would lead to:
cannot create <nil>/go.o: No such file or directory

R=golang-dev, iant, dave, bradfitz
CC=golang-dev
https://golang.org/cl/8355045
---
 src/lib9/tempdir_unix.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lib9/tempdir_unix.c b/src/lib9/tempdir_unix.c
index 7b7e58b4d0..99a7092b68 100644
--- a/src/lib9/tempdir_unix.c
+++ b/src/lib9/tempdir_unix.c
@@ -16,7 +16,7 @@ mktempdir(void)
 	char *tmp, *p;
 	
 	tmp = getenv("TMPDIR");
-	if(tmp == nil)
+	if(tmp == nil || strlen(tmp) == 0)
 		tmp = "/var/tmp";
 	p = smprint("%s/go-link-XXXXXX", tmp);
 	if(mkdtemp(p) == nil)
-- 
2.50.0