From: David du Colombier <0intro@gmail.com>
Date: Tue, 2 Sep 2014 22:56:31 +0000 (+0200)
Subject: runtime: handle empty environment variables on Plan 9
X-Git-Tag: go1.4beta1~571
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=b3f224b2801059bf6b2d1b4001ffd8d34c91d19e;p=gostls13.git

runtime: handle empty environment variables on Plan 9

LGTM=bradfitz, rsc
R=rsc, bradfitz
CC=golang-codereviews
https://golang.org/cl/137920044
---

diff --git a/src/pkg/runtime/env_plan9.go b/src/pkg/runtime/env_plan9.go
index b6dcb4c1ea..76e9867e03 100644
--- a/src/pkg/runtime/env_plan9.go
+++ b/src/pkg/runtime/env_plan9.go
@@ -31,6 +31,10 @@ func gogetenv(key string) string {
 		return ""
 	}
 	n := seek(fd, 0, 2) - 1
+	if n <= 0 {
+		close(fd)
+		return ""
+	}
 
 	p := make([]byte, n)