nixos/wireless: fix for multiple interfaces

Closes issue #529889

nixos/modules/services/networking/wpa_supplicant.nix

@@ -127,7 +127,7 @@ let
           ]
           ++ lib.optionals cfg.userControlled [
             # set up client sockets directory
-            "+${pkgs.coreutils}/bin/mkdir /run/wpa_supplicant/client"
+            "+${pkgs.coreutils}/bin/mkdir -p /run/wpa_supplicant/client"
             "+${pkgs.coreutils}/bin/chown wpa_supplicant:wpa_supplicant /run/wpa_supplicant/client"
             "+${pkgs.coreutils}/bin/chmod g=u /run/wpa_supplicant/client"
           ];

nixos/tests/wpa_supplicant.nix

@@ -283,18 +283,22 @@ in
         enable = lib.mkOverride 0 true;
         userControlled = true;
         allowAuxiliaryImperativeNetworks = true;
-        interfaces = [ "wlan1" ];
+        interfaces = [
+          "wlan0"
+          "wlan1"
+        ];
       };
     };
 
     testScript = ''
       wpa_cli = "sudo -u alice -g wpa_supplicant wpa_cli"
 
-      with subtest("Daemon is running and accepting connections"):
-          machine.wait_for_unit("wpa_supplicant-wlan1.service")
-          status = machine.wait_until_succeeds(f"{wpa_cli} -i wlan1 status")
-          assert "Failed to connect" not in status, \
-                 "Failed to connect to the daemon"
+      with subtest("Daemons are running and accepting connections"):
+          for iface in ["wlan0", "wlan1"]:
+            machine.wait_for_unit(f"wpa_supplicant-{iface}.service")
+            status = machine.wait_until_succeeds(f"{wpa_cli} -i {iface} status")
+            assert "Failed to connect" not in status, \
+                   f"Failed to connect to the daemon for {iface}"
 
       with subtest("Daemon can be configured imperatively"):
           machine.succeed(f"{wpa_cli} -i wlan1 add_network")