From 002ffea364331adcb5dccd87dddf69d5f5912271 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Mon, 15 Jul 2013 13:52:46 +0200
Subject: [PATCH] wpa_supplicant: Fix wlan interface detection on Linux 3.4

Linux 3.4 apparently doesn't have the "wireless" file.
---
 modules/services/networking/wpa_supplicant.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/modules/services/networking/wpa_supplicant.nix b/modules/services/networking/wpa_supplicant.nix
index 11f8778a0abe..dca398dd8be2 100644
--- a/modules/services/networking/wpa_supplicant.nix
+++ b/modules/services/networking/wpa_supplicant.nix
@@ -110,7 +110,9 @@ in
           ''
             ${if ifaces == [] then ''
               for i in $(cd /sys/class/net && echo *); do
-                if [ -e /sys/class/net/$i/wireless ]; then
+                DEVTYPE=
+                source /sys/class/net/$i/uevent
+                if [ "$DEVTYPE" = "wlan" -o -e /sys/class/net/$i/wireless ]; then
                   ifaces="$ifaces''${ifaces:+ -N} -i$i"
                 fi
               done