From b124d4c1b8a42a728e6bce5ce82a920df8c1c24d Mon Sep 17 00:00:00 2001
From: Cloud Wu <cloudwu@gmail.com>
Date: Mon, 18 Apr 2016 11:55:39 +0800
Subject: [PATCH] skynet.getenv can return empty string

---
 lualib/skynet.lua     | 7 +------
 service/bootstrap.lua | 6 +++---
 2 files changed, 4 insertions(+), 9 deletions(-)

diff --git a/lualib/skynet.lua b/lualib/skynet.lua
index 94db8b5e..463048fe 100644
--- a/lualib/skynet.lua
+++ b/lualib/skynet.lua
@@ -343,12 +343,7 @@ function skynet.exit()
 end
 
 function skynet.getenv(key)
-	local ret = c.command("GETENV",key)
-	if ret == "" then
-		return
-	else
-		return ret
-	end
+	return c.command("GETENV",key)
 end
 
 function skynet.setenv(key, value)
diff --git a/service/bootstrap.lua b/service/bootstrap.lua
index db8d8581..90a542cb 100644
--- a/service/bootstrap.lua
+++ b/service/bootstrap.lua
@@ -4,15 +4,15 @@ require "skynet.manager"	-- import skynet.launch, ...
 local memory = require "memory"
 
 skynet.start(function()
-	local sharestring = tonumber(skynet.getenv "sharestring")
-	memory.ssexpand(sharestring or 4096)
+	local sharestring = tonumber(skynet.getenv "sharestring" or 4096)
+	memory.ssexpand(sharestring)
 
 	local standalone = skynet.getenv "standalone"
 
 	local launcher = assert(skynet.launch("snlua","launcher"))
 	skynet.name(".launcher", launcher)
 
-	local harbor_id = tonumber(skynet.getenv "harbor")
+	local harbor_id = tonumber(skynet.getenv "harbor" or 0)
 	if harbor_id == 0 then
 		assert(standalone ==  nil)
 		standalone = true