From 52865b9bf0fa41ffb4e2e22c505ea23d4feb23a8 Mon Sep 17 00:00:00 2001
From: Ted Trask <ttrask01@yahoo.com>
Date: Tue, 11 Dec 2012 02:42:26 +0000
Subject: Interfaces: Replace io.popen with subprocess.call_capture

---
 interfaces-model.lua | 39 +++++++++++----------------------------
 1 file changed, 11 insertions(+), 28 deletions(-)

diff --git a/interfaces-model.lua b/interfaces-model.lua
index 40b9542..6b3db5b 100644
--- a/interfaces-model.lua
+++ b/interfaces-model.lua
@@ -5,6 +5,7 @@ module (..., package.seeall)
 require("modelfunctions")
 fs = require("acf.fs")
 format = require("acf.format")
+require("subprocess")
 
 local servicename = "networking"
 local filename = "/etc/network/interfaces" 
@@ -332,19 +333,12 @@ get_status = function ()
 	if not fs.is_file(filename) then
 		status.filename.errtxt = "File not found"
 	end
-	local cmd = path.."ip route"
-	local f = io.popen(cmd)
-	status.iproute.value = f:read("*a")
-	f:close()
-	cmd = path.."ip addr"
-	f = io.popen(cmd)
-	status.ipaddr.value = f:read("*a")
-	f:close()
-	cmd = path.."ip tunnel"
-	f = io.popen(cmd)
-	status.iptunnel.value = f:read("*a")
-	f:close()
 
+	local code
+	code,status.iproute.value = subprocess.call_capture({"ip", "route"})
+	code,status.ipaddr.value = subprocess.call_capture({"ip", "addr"})
+	code,status.iptunnel.value = subprocess.call_capture({"ip", "tunnel"})
+	
 	return cfe({ type="group", value=status, label="Status" })
 end
 
@@ -358,10 +352,7 @@ write_file = function (self, newfile)
 end
 
 get_interfaces = function()
-	local cmd = path.."ip addr"
-	local f = io.popen(cmd)
-	local ipaddr = f:read("*a")
-	f:close()
+	local code,ipaddr = subprocess.call_capture({"ip", "addr"})
 	-- now parse the result to find the interfaces
 	local retval = {}
 	for line in string.gmatch(ipaddr, "[^\n]*\n?") do
@@ -374,10 +365,7 @@ get_interfaces = function()
 end
 
 get_addresses = function()
-	local cmd = path.."ip addr"
-	local f = io.popen(cmd)
-	local ipaddr = f:read("*a")
-	f:close()
+	local code,ipaddr = subprocess.call_capture({"ip", "addr"})
 	-- now parse the result to find the interfaces and IP addresses
 	local retval = {}
 	local interface
@@ -402,10 +390,8 @@ ifup_by_name = function (self, ifuprequest)
 	local success = modelfunctions.validateselect(ifuprequest.value.name)
 	if success then
 		name = ifuprequest.value.name.value or ""
-		local cmd = path.."ifup "..format.escapespecialcharacters(name).." 2>&1"
-		local f = io.popen(cmd)
-		ifuprequest.descr = f:read("*a")
-		f:close()
+		local code
+		code,ifuprequest.descr = subprocess.call_capture({"ifup", name, stderr=subprocess.STDOUT})
 
 		if ifuprequest.descr == "" then
 			ifuprequest.descr = "Interface up"
@@ -428,10 +414,7 @@ ifdown_by_name = function (self, ifdownrequest)
 	local success = modelfunctions.validateselect(ifdownrequest.value.name)
 	if success then
 		name = ifdownrequest.value.name.value or ""
-		local cmd = path.."ifdown "..format.escapespecialcharacters(name).." 2>&1"
-		local f = io.popen(cmd)
-		ifdownrequest.descr = f:read("*a")
-		f:close()
+		code,ifdownrequest.descr = subprocess.call_capture({"ifdown", name, stderr=subprocess.STDOUT})
 
 		if ifdownrequest.descr == "" then
 			ifdownrequest.descr = "Interface down"
-- 
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