release: 0.3.3

Signed-off-by: Ophestra <cat@gensokyo.uk>

cmd/hakurei/command.go

@@ -14,7 +14,6 @@ import (
 	_ "unsafe" // for go:linkname
 
 	"hakurei.app/command"
-	"hakurei.app/container"
 	"hakurei.app/container/check"
 	"hakurei.app/container/fhs"
 	"hakurei.app/hst"
@@ -187,14 +186,6 @@ func buildCommand(ctx context.Context, msg message.Msg, early *earlyHardeningErr
 				}})
 			}
 
-			// start pipewire-pulse: this most likely exists on host if PipeWire is available
-			if flagPulse {
-				config.Container.Filesystem = append(config.Container.Filesystem, hst.FilesystemConfigJSON{FilesystemConfig: &hst.FSDaemon{
-					Target: fhs.AbsRunUser.Append(strconv.Itoa(container.OverflowUid(msg)), "pulse/native"),
-					Exec:   shell, Args: []string{"-lc", "exec pipewire-pulse"},
-				}})
-			}
-
 			config.Container.Filesystem = append(config.Container.Filesystem,
 				// opportunistically bind kvm
 				hst.FilesystemConfigJSON{FilesystemConfig: &hst.FSBind{

cmd/hpkg/test/default.nix

@@ -1,5 +1,5 @@
 {
-  nixosTest,
+  testers,
   callPackage,
 
   system,
@@ -8,7 +8,7 @@
 let
   buildPackage = self.buildPackage.${system};
 in
-nixosTest {
+testers.nixosTest {
   name = "hpkg";
   nodes.machine = {
     environment.etc = {

container/autoroot_test.go

@@ -202,7 +202,7 @@ func TestIsAutoRootBindable(t *testing.T) {
 			t.Parallel()
 			var msg message.Msg
 			if tc.log {
-				msg = &kstub{nil, stub.New(t, func(s *stub.Stub[syscallDispatcher]) syscallDispatcher { panic("unreachable") }, stub.Expect{Calls: []stub.Call{
+				msg = &kstub{nil, nil, stub.New(t, func(s *stub.Stub[syscallDispatcher]) syscallDispatcher { panic("unreachable") }, stub.Expect{Calls: []stub.Call{
 					call("verbose", stub.ExpectArgs{[]any{"got unexpected root entry"}}, nil, nil),
 				}})}
 			}

container/dispatcher_test.go

@@ -162,7 +162,8 @@ func checkSimple(t *testing.T, fname string, testCases []simpleTestCase) {
 			t.Parallel()
 
 			wait4signal := make(chan struct{})
-			k := &kstub{wait4signal, stub.New(t, func(s *stub.Stub[syscallDispatcher]) syscallDispatcher { return &kstub{wait4signal, s} }, tc.want)}
+			lockNotify := make(chan struct{})
+			k := &kstub{wait4signal, lockNotify, stub.New(t, func(s *stub.Stub[syscallDispatcher]) syscallDispatcher { return &kstub{wait4signal, lockNotify, s} }, tc.want)}
 			defer stub.HandleExit(t)
 			if err := tc.f(k); !reflect.DeepEqual(err, tc.wantErr) {
 				t.Errorf("%s: error = %v, want %v", fname, err, tc.wantErr)
@@ -200,8 +201,8 @@ func checkOpBehaviour(t *testing.T, testCases []opBehaviourTestCase) {
 				t.Helper()
 				t.Parallel()
 
-				k := &kstub{nil, stub.New(t,
-					func(s *stub.Stub[syscallDispatcher]) syscallDispatcher { return &kstub{nil, s} },
+				k := &kstub{nil, nil, stub.New(t,
+					func(s *stub.Stub[syscallDispatcher]) syscallDispatcher { return &kstub{nil, nil, s} },
 					stub.Expect{Calls: slices.Concat(tc.early, []stub.Call{{Name: stub.CallSeparator}}, tc.apply)},
 				)}
 				state := &setupState{Params: tc.params, Msg: k}
@@ -322,12 +323,19 @@ const (
 
 type kstub struct {
 	wait4signal chan struct{}
+	lockNotify  chan struct{}
 	*stub.Stub[syscallDispatcher]
 }
 
 func (k *kstub) new(f func(k syscallDispatcher)) { k.Helper(); k.New(f) }
 
-func (k *kstub) lockOSThread() { k.Helper(); k.Expects("lockOSThread") }
+func (k *kstub) lockOSThread() {
+	k.Helper()
+	expect := k.Expects("lockOSThread")
+	if k.lockNotify != nil && expect.Ret == magicWait4Signal {
+		<-k.lockNotify
+	}
+}
 
 func (k *kstub) setPtracer(pid uintptr) error {
 	k.Helper()
@@ -472,6 +480,10 @@ func (k *kstub) notify(c chan<- os.Signal, sig ...os.Signal) {
 		k.FailNow()
 	}
 
+	if k.lockNotify != nil && expect.Ret == magicWait4Signal {
+		defer close(k.lockNotify)
+	}
+
 	// export channel for external instrumentation
 	if chanf, ok := expect.Args[0].(func(c chan<- os.Signal)); ok && chanf != nil {
 		chanf(c)

container/init_test.go

@@ -1992,7 +1992,7 @@ func TestInitEntrypoint(t *testing.T) {
 
 			/* wait4 */
 			Tracks: []stub.Expect{{Calls: []stub.Call{
-				call("lockOSThread", stub.ExpectArgs{}, nil, nil),
+				call("lockOSThread", stub.ExpectArgs{}, magicWait4Signal, nil),
 
 				// this terminates the goroutine at the call, preventing it from leaking while preserving behaviour
 				call("wait4", stub.ExpectArgs{-1, nil, 0, nil, stub.PanicExit}, 0, syscall.ECHILD),
@@ -2075,7 +2075,7 @@ func TestInitEntrypoint(t *testing.T) {
 				call("fatalf", stub.ExpectArgs{"cannot close setup pipe: %v", []any{stub.UniqueError(10)}}, nil, nil),
 				call("verbosef", stub.ExpectArgs{"starting initial program %s", []any{check.MustAbs("/run/current-system/sw/bin/bash")}}, nil, nil),
 				call("start", stub.ExpectArgs{"/run/current-system/sw/bin/bash", []string{"bash", "-c", "false"}, ([]string)(nil), "/.hakurei/nonexistent"}, &os.Process{Pid: 0xbad}, nil),
-				call("notify", stub.ExpectArgs{func(c chan<- os.Signal) { c <- CancelSignal }, []os.Signal{CancelSignal, os.Interrupt, syscall.SIGTERM, syscall.SIGQUIT}}, nil, nil),
+				call("notify", stub.ExpectArgs{func(c chan<- os.Signal) { c <- CancelSignal }, []os.Signal{CancelSignal, os.Interrupt, syscall.SIGTERM, syscall.SIGQUIT}}, magicWait4Signal, nil),
 				call("verbose", stub.ExpectArgs{[]any{"forwarding context cancellation"}}, nil, nil),
 				// magicWait4Signal as ret causes wait4 stub to unblock
 				call("signal", stub.ExpectArgs{"/run/current-system/sw/bin/bash", []string{"bash", "-c", "false"}, ([]string)(nil), "/.hakurei/nonexistent", os.Interrupt}, magicWait4Signal, stub.UniqueError(9)),
@@ -2090,7 +2090,7 @@ func TestInitEntrypoint(t *testing.T) {
 
 			/* wait4 */
 			Tracks: []stub.Expect{{Calls: []stub.Call{
-				call("lockOSThread", stub.ExpectArgs{}, nil, nil),
+				call("lockOSThread", stub.ExpectArgs{}, magicWait4Signal, nil),
 
 				// magicWait4Signal as args[4] causes this to block until simulated signal is delivered
 				call("wait4", stub.ExpectArgs{-1, syscall.WaitStatus(0xfade01ce), 0, nil, magicWait4Signal}, 0xbad, nil),
@@ -2175,7 +2175,7 @@ func TestInitEntrypoint(t *testing.T) {
 				call("fatalf", stub.ExpectArgs{"cannot close setup pipe: %v", []any{stub.UniqueError(7)}}, nil, nil),
 				call("verbosef", stub.ExpectArgs{"starting initial program %s", []any{check.MustAbs("/run/current-system/sw/bin/bash")}}, nil, nil),
 				call("start", stub.ExpectArgs{"/run/current-system/sw/bin/bash", []string{"bash", "-c", "false"}, ([]string)(nil), "/.hakurei/nonexistent"}, &os.Process{Pid: 0xbad}, nil),
-				call("notify", stub.ExpectArgs{func(c chan<- os.Signal) { c <- syscall.SIGQUIT }, []os.Signal{CancelSignal, os.Interrupt, syscall.SIGTERM, syscall.SIGQUIT}}, nil, nil),
+				call("notify", stub.ExpectArgs{func(c chan<- os.Signal) { c <- syscall.SIGQUIT }, []os.Signal{CancelSignal, os.Interrupt, syscall.SIGTERM, syscall.SIGQUIT}}, magicWait4Signal, nil),
 				call("verbosef", stub.ExpectArgs{"got %s, forwarding to initial process", []any{"quit"}}, nil, nil),
 				// magicWait4Signal as ret causes wait4 stub to unblock
 				call("signal", stub.ExpectArgs{"/run/current-system/sw/bin/bash", []string{"bash", "-c", "false"}, ([]string)(nil), "/.hakurei/nonexistent", syscall.SIGQUIT}, magicWait4Signal, stub.UniqueError(0xfe)),
@@ -2190,7 +2190,7 @@ func TestInitEntrypoint(t *testing.T) {
 
 			/* wait4 */
 			Tracks: []stub.Expect{{Calls: []stub.Call{
-				call("lockOSThread", stub.ExpectArgs{}, nil, nil),
+				call("lockOSThread", stub.ExpectArgs{}, magicWait4Signal, nil),
 
 				// magicWait4Signal as args[4] causes this to block until simulated signal is delivered
 				call("wait4", stub.ExpectArgs{-1, syscall.WaitStatus(0xfade01ce), 0, nil, magicWait4Signal}, 0xbad, nil),
@@ -2275,7 +2275,7 @@ func TestInitEntrypoint(t *testing.T) {
 				call("fatalf", stub.ExpectArgs{"cannot close setup pipe: %v", []any{stub.UniqueError(7)}}, nil, nil),
 				call("verbosef", stub.ExpectArgs{"starting initial program %s", []any{check.MustAbs("/run/current-system/sw/bin/bash")}}, nil, nil),
 				call("start", stub.ExpectArgs{"/run/current-system/sw/bin/bash", []string{"bash", "-c", "false"}, ([]string)(nil), "/.hakurei/nonexistent"}, &os.Process{Pid: 0xbad}, nil),
-				call("notify", stub.ExpectArgs{func(c chan<- os.Signal) { c <- os.Interrupt }, []os.Signal{CancelSignal, os.Interrupt, syscall.SIGTERM, syscall.SIGQUIT}}, nil, nil),
+				call("notify", stub.ExpectArgs{func(c chan<- os.Signal) { c <- os.Interrupt }, []os.Signal{CancelSignal, os.Interrupt, syscall.SIGTERM, syscall.SIGQUIT}}, magicWait4Signal, nil),
 				call("verbosef", stub.ExpectArgs{"got %s", []any{"interrupt"}}, nil, nil),
 				call("beforeExit", stub.ExpectArgs{}, nil, nil),
 				call("exit", stub.ExpectArgs{0}, nil, nil),
@@ -2283,7 +2283,7 @@ func TestInitEntrypoint(t *testing.T) {
 
 			/* wait4 */
 			Tracks: []stub.Expect{{Calls: []stub.Call{
-				call("lockOSThread", stub.ExpectArgs{}, nil, nil),
+				call("lockOSThread", stub.ExpectArgs{}, magicWait4Signal, nil),
 
 				// this terminates the goroutine at the call, preventing it from leaking while preserving behaviour
 				call("wait4", stub.ExpectArgs{-1, nil, 0, nil, stub.PanicExit}, 0, syscall.ECHILD),
@@ -2366,7 +2366,7 @@ func TestInitEntrypoint(t *testing.T) {
 				call("fatalf", stub.ExpectArgs{"cannot close setup pipe: %v", []any{stub.UniqueError(5)}}, nil, nil),
 				call("verbosef", stub.ExpectArgs{"starting initial program %s", []any{check.MustAbs("/run/current-system/sw/bin/bash")}}, nil, nil),
 				call("start", stub.ExpectArgs{"/run/current-system/sw/bin/bash", []string{"bash", "-c", "false"}, ([]string)(nil), "/.hakurei/nonexistent"}, &os.Process{Pid: 0xbad}, nil),
-				call("notify", stub.ExpectArgs{nil, []os.Signal{CancelSignal, os.Interrupt, syscall.SIGTERM, syscall.SIGQUIT}}, nil, nil),
+				call("notify", stub.ExpectArgs{nil, []os.Signal{CancelSignal, os.Interrupt, syscall.SIGTERM, syscall.SIGQUIT}}, magicWait4Signal, nil),
 				call("verbose", stub.ExpectArgs{[]any{os.ErrInvalid.Error()}}, nil, nil),
 				call("verbose", stub.ExpectArgs{[]any{os.ErrInvalid.Error()}}, nil, nil),
 				call("verbosef", stub.ExpectArgs{"initial process exited with signal %s", []any{syscall.Signal(0x4e)}}, nil, nil),
@@ -2377,7 +2377,7 @@ func TestInitEntrypoint(t *testing.T) {
 
 			/* wait4 */
 			Tracks: []stub.Expect{{Calls: []stub.Call{
-				call("lockOSThread", stub.ExpectArgs{}, nil, nil),
+				call("lockOSThread", stub.ExpectArgs{}, magicWait4Signal, nil),
 
 				call("wait4", stub.ExpectArgs{-1, syscall.WaitStatus(0xfade01ce), 0, nil}, 0xbad, nil),
 				// this terminates the goroutine at the call, preventing it from leaking while preserving behaviour
@@ -2461,7 +2461,7 @@ func TestInitEntrypoint(t *testing.T) {
 				call("fatalf", stub.ExpectArgs{"cannot close setup pipe: %v", []any{stub.UniqueError(3)}}, nil, nil),
 				call("verbosef", stub.ExpectArgs{"starting initial program %s", []any{check.MustAbs("/run/current-system/sw/bin/bash")}}, nil, nil),
 				call("start", stub.ExpectArgs{"/run/current-system/sw/bin/bash", []string{"bash", "-c", "false"}, ([]string)(nil), "/.hakurei/nonexistent"}, &os.Process{Pid: 0xbad}, nil),
-				call("notify", stub.ExpectArgs{nil, []os.Signal{CancelSignal, os.Interrupt, syscall.SIGTERM, syscall.SIGQUIT}}, nil, nil),
+				call("notify", stub.ExpectArgs{nil, []os.Signal{CancelSignal, os.Interrupt, syscall.SIGTERM, syscall.SIGQUIT}}, magicWait4Signal, nil),
 				call("verbose", stub.ExpectArgs{[]any{os.ErrInvalid.Error()}}, nil, nil),
 				call("verbose", stub.ExpectArgs{[]any{os.ErrInvalid.Error()}}, nil, nil),
 				call("verbosef", stub.ExpectArgs{"initial process exited with signal %s", []any{syscall.Signal(0x4e)}}, nil, nil),
@@ -2471,7 +2471,7 @@ func TestInitEntrypoint(t *testing.T) {
 
 			/* wait4 */
 			Tracks: []stub.Expect{{Calls: []stub.Call{
-				call("lockOSThread", stub.ExpectArgs{}, nil, nil),
+				call("lockOSThread", stub.ExpectArgs{}, magicWait4Signal, nil),
 
 				call("wait4", stub.ExpectArgs{-1, nil, 0, nil}, 0, syscall.EINTR),
 				call("wait4", stub.ExpectArgs{-1, nil, 0, nil}, 0, syscall.EINTR),
@@ -2599,7 +2599,7 @@ func TestInitEntrypoint(t *testing.T) {
 				call("fatalf", stub.ExpectArgs{"cannot close setup pipe: %v", []any{stub.UniqueError(1)}}, nil, nil),
 				call("verbosef", stub.ExpectArgs{"starting initial program %s", []any{check.MustAbs("/run/current-system/sw/bin/bash")}}, nil, nil),
 				call("start", stub.ExpectArgs{"/run/current-system/sw/bin/bash", []string{"bash", "-c", "false"}, ([]string)(nil), "/.hakurei/nonexistent"}, &os.Process{Pid: 0xbad}, nil),
-				call("notify", stub.ExpectArgs{nil, []os.Signal{CancelSignal, os.Interrupt, syscall.SIGTERM, syscall.SIGQUIT}}, nil, nil),
+				call("notify", stub.ExpectArgs{nil, []os.Signal{CancelSignal, os.Interrupt, syscall.SIGTERM, syscall.SIGQUIT}}, magicWait4Signal, nil),
 				call("verbose", stub.ExpectArgs{[]any{os.ErrInvalid.Error()}}, nil, nil),
 				call("verbose", stub.ExpectArgs{[]any{os.ErrInvalid.Error()}}, nil, nil),
 				call("verbosef", stub.ExpectArgs{"initial process exited with code %d", []any{1}}, nil, nil),
@@ -2609,7 +2609,7 @@ func TestInitEntrypoint(t *testing.T) {
 
 			/* wait4 */
 			Tracks: []stub.Expect{{Calls: []stub.Call{
-				call("lockOSThread", stub.ExpectArgs{}, nil, nil),
+				call("lockOSThread", stub.ExpectArgs{}, magicWait4Signal, nil),
 
 				call("wait4", stub.ExpectArgs{-1, nil, 0, nil}, 0, syscall.EINTR),
 				call("wait4", stub.ExpectArgs{-1, nil, 0, nil}, 0, syscall.EINTR),
@@ -2741,7 +2741,7 @@ func TestInitEntrypoint(t *testing.T) {
 				call("fatalf", stub.ExpectArgs{"cannot close setup pipe: %v", []any{stub.UniqueError(0)}}, nil, nil),
 				call("verbosef", stub.ExpectArgs{"starting initial program %s", []any{check.MustAbs("/bin/zsh")}}, nil, nil),
 				call("start", stub.ExpectArgs{"/bin/zsh", []string{"zsh", "-c", "exec vim"}, []string{"DISPLAY=:0"}, "/.hakurei"}, &os.Process{Pid: 0xcafe}, nil),
-				call("notify", stub.ExpectArgs{nil, []os.Signal{CancelSignal, os.Interrupt, syscall.SIGTERM, syscall.SIGQUIT}}, nil, nil),
+				call("notify", stub.ExpectArgs{nil, []os.Signal{CancelSignal, os.Interrupt, syscall.SIGTERM, syscall.SIGQUIT}}, magicWait4Signal, nil),
 				call("verbose", stub.ExpectArgs{[]any{os.ErrInvalid.Error()}}, nil, nil),
 				call("verbose", stub.ExpectArgs{[]any{os.ErrInvalid.Error()}}, nil, nil),
 				call("verbose", stub.ExpectArgs{[]any{os.ErrInvalid.Error()}}, nil, nil),
@@ -2752,7 +2752,7 @@ func TestInitEntrypoint(t *testing.T) {
 
 			/* wait4 */
 			Tracks: []stub.Expect{{Calls: []stub.Call{
-				call("lockOSThread", stub.ExpectArgs{}, nil, nil),
+				call("lockOSThread", stub.ExpectArgs{}, magicWait4Signal, nil),
 
 				call("wait4", stub.ExpectArgs{-1, nil, 0, nil}, 0, syscall.EINTR),
 				call("wait4", stub.ExpectArgs{-1, nil, 0, nil}, 0, syscall.EINTR),

flake.lock

@@ -7,32 +7,32 @@
         ]
       },
       "locked": {
-        "lastModified": 1756679287,
-        "narHash": "sha256-Xd1vOeY9ccDf5VtVK12yM0FS6qqvfUop8UQlxEB+gTQ=",
+        "lastModified": 1765384171,
+        "narHash": "sha256-FuFtkJrW1Z7u+3lhzPRau69E0CNjADku1mLQQflUORo=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "07fc025fe10487dd80f2ec694f1cd790e752d0e8",
+        "rev": "44777152652bc9eacf8876976fa72cc77ca8b9d8",
         "type": "github"
       },
       "original": {
         "owner": "nix-community",
-        "ref": "release-25.05",
+        "ref": "release-25.11",
         "repo": "home-manager",
         "type": "github"
       }
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1757020766,
-        "narHash": "sha256-PLoSjHRa2bUbi1x9HoXgTx2AiuzNXs54c8omhadyvp0=",
+        "lastModified": 1765311797,
+        "narHash": "sha256-mSD5Ob7a+T2RNjvPvOA1dkJHGVrNVl8ZOrAwBjKBDQo=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "fe83bbdde2ccdc2cb9573aa846abe8363f79a97a",
+        "rev": "09eb77e94fa25202af8f3e81ddc7353d9970ac1b",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-25.05",
+        "ref": "nixos-25.11",
         "repo": "nixpkgs",
         "type": "github"
       }

flake.nix

@@ -2,10 +2,10 @@
   description = "hakurei container tool and nixos module";
 
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.05";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.11";
 
     home-manager = {
-      url = "github:nix-community/home-manager/release-25.05";
+      url = "github:nix-community/home-manager/release-25.11";
       inputs.nixpkgs.follows = "nixpkgs";
     };
   };
@@ -185,13 +185,13 @@
                       hakurei =
                         let
                           # this is used for interactive vm testing during development, where tests might be broken
-                          package = self.packages.${pkgs.system}.hakurei.override {
+                          package = self.packages.${pkgs.stdenv.hostPlatform.system}.hakurei.override {
                             buildGoModule = previousArgs: pkgs.pkgsStatic.buildGoModule (previousArgs // { doCheck = false; });
                           };
                         in
                         {
                           inherit package;
-                          hsuPackage = self.packages.${pkgs.system}.hsu.override { hakurei = package; };
+                          hsuPackage = self.packages.${pkgs.stdenv.hostPlatform.system}.hsu.override { hakurei = package; };
                         };
                     };
                   }

hst/config.go

@@ -30,12 +30,46 @@ type Config struct {
 	// This option is unsupported and most likely enables full control over the Wayland
 	// session. Do not set this to true unless you are sure you know what you are doing.
 	DirectWayland bool `json:"direct_wayland,omitempty"`
+	// Direct access to the PipeWire socket established via SecurityContext::Create, no
+	// attempt is made to start the pipewire-pulse server.
+	//
+	// The SecurityContext machinery is fatally flawed, it blindly sets read and execute
+	// bits on all objects for clients with the lowest achievable privilege level (by
+	// setting PW_KEY_ACCESS to "restricted"). This enables them to call any method
+	// targeting any object, and since Registry::Destroy checks for the read and execute bit,
+	// allows the destruction of any object other than PW_ID_CORE as well. This behaviour
+	// is implemented separately in media-session and wireplumber, with the wireplumber
+	// implementation in Lua via an embedded Lua vm. In all known setups, wireplumber is
+	// in use, and there is no known way to change its behaviour and set permissions
+	// differently without replacing the Lua script. Also, since PipeWire relies on these
+	// permissions to work, reducing them is not possible.
+	//
+	// Currently, the only other sandboxed use case is flatpak, which is not aware of
+	// PipeWire and blindly exposes the bare PulseAudio socket to the container (behaves
+	// like DirectPulse). This socket is backed by the pipewire-pulse compatibility daemon,
+	// which obtains client pid via the SO_PEERCRED option. The PipeWire daemon, pipewire-pulse
+	// daemon and the session manager daemon then separately performs the /.flatpak-info hack
+	// described in https://git.gensokyo.uk/security/hakurei/issues/21. Under such use case,
+	// since the client has no direct access to PipeWire, insecure parts of the protocol are
+	// obscured by pipewire-pulse simply not implementing them, and thus hiding the flaws
+	// described above.
+	//
+	// Hakurei does not rely on the /.flatpak-info hack. Instead, a socket is sets up via
+	// SecurityContext. A pipewire-pulse server connected through it achieves the same
+	// permissions as flatpak does via the /.flatpak-info hack and is maintained for the
+	// life of the container.
+	//
+	// This option is unsupported and enables a denial-of-service attack as the sandboxed
+	// client is able to destroy any client object and thus disconnecting them from PipeWire,
+	// or destroy the SecurityContext object preventing any further container creation.
+	// Do not set this to true, it is insecure under any configuration.
+	DirectPipeWire bool `json:"direct_pipewire,omitempty"`
 	// Direct access to PulseAudio socket, no attempt is made to establish pipewire-pulse
 	// server via a PipeWire socket with a SecurityContext attached and the bare socket
 	// is made available to the container.
 	//
 	// This option is unsupported and enables arbitrary code execution as the PulseAudio
-	// server. Do not set this to true, this is insecure under any configuration.
+	// server. Do not set this to true, it is insecure under any configuration.
 	DirectPulse bool `json:"direct_pulse,omitempty"`
 
 	// Extra acl updates to perform before setuid.

internal/outcome/dispatcher.go

@@ -53,6 +53,10 @@ type syscallDispatcher interface {
 	readdir(name string) ([]os.DirEntry, error)
 	// tempdir provides [os.TempDir].
 	tempdir() string
+	// mkdir provides [os.Mkdir].
+	mkdir(name string, perm os.FileMode) error
+	// removeAll provides [os.RemoveAll].
+	removeAll(path string) error
 	// exit provides [os.Exit].
 	exit(code int)
 
@@ -62,6 +66,8 @@ type syscallDispatcher interface {
 	// lookupGroupId calls [user.LookupGroup] and returns the Gid field of the resulting [user.Group] struct.
 	lookupGroupId(name string) (string, error)
 
+	// lookPath provides exec.LookPath.
+	lookPath(file string) (string, error)
 	// cmdOutput provides the Output method of [exec.Cmd].
 	cmdOutput(cmd *exec.Cmd) ([]byte, error)
 
@@ -121,6 +127,8 @@ func (direct) stat(name string) (os.FileInfo, error)      { return os.Stat(name)
 func (direct) open(name string) (osFile, error)           { return os.Open(name) }
 func (direct) readdir(name string) ([]os.DirEntry, error) { return os.ReadDir(name) }
 func (direct) tempdir() string                            { return os.TempDir() }
+func (direct) mkdir(name string, perm os.FileMode) error  { return os.Mkdir(name, perm) }
+func (direct) removeAll(path string) error                { return os.RemoveAll(path) }
 func (direct) exit(code int)                              { os.Exit(code) }
 
 func (direct) evalSymlinks(path string) (string, error) { return filepath.EvalSymlinks(path) }
@@ -134,6 +142,7 @@ func (direct) lookupGroupId(name string) (gid string, err error) {
 	return
 }
 
+func (direct) lookPath(file string) (string, error)    { return exec.LookPath(file) }
 func (direct) cmdOutput(cmd *exec.Cmd) ([]byte, error) { return cmd.Output() }
 
 func (direct) notifyContext(parent context.Context, signals ...os.Signal) (ctx context.Context, stop context.CancelFunc) {

internal/outcome/dispatcher_test.go

@@ -701,10 +701,13 @@ func (panicDispatcher) stat(string) (os.FileInfo, error)                    { pa
 func (panicDispatcher) open(string) (osFile, error)                         { panic("unreachable") }
 func (panicDispatcher) readdir(string) ([]os.DirEntry, error)               { panic("unreachable") }
 func (panicDispatcher) tempdir() string                                     { panic("unreachable") }
+func (panicDispatcher) mkdir(string, os.FileMode) error                     { panic("unreachable") }
+func (panicDispatcher) removeAll(string) error                              { panic("unreachable") }
 func (panicDispatcher) exit(int)                                            { panic("unreachable") }
 func (panicDispatcher) evalSymlinks(string) (string, error)                 { panic("unreachable") }
 func (panicDispatcher) prctl(uintptr, uintptr, uintptr) error               { panic("unreachable") }
 func (panicDispatcher) lookupGroupId(string) (string, error)                { panic("unreachable") }
+func (panicDispatcher) lookPath(string) (string, error)                     { panic("unreachable") }
 func (panicDispatcher) cmdOutput(*exec.Cmd) ([]byte, error)                 { panic("unreachable") }
 func (panicDispatcher) overflowUid(message.Msg) int                         { panic("unreachable") }
 func (panicDispatcher) overflowGid(message.Msg) int                         { panic("unreachable") }

internal/outcome/outcome.go

@@ -70,7 +70,7 @@ type outcomeState struct {
 	// Copied from their respective exported values.
 	mapuid, mapgid *stringPair[int]
 
-	// Copied from [EnvPaths] per-process.
+	// Copied from [env.Paths] per-process.
 	sc hst.Paths
 	*env.Paths
 
@@ -172,6 +172,8 @@ type outcomeStateSys struct {
 
 	// Copied from [hst.Config]. Safe for read by spWaylandOp.toSystem only.
 	directWayland bool
+	// Copied from [hst.Config]. Safe for read by spPipeWireOp.toSystem only.
+	directPipeWire bool
 	// Copied from [hst.Config]. Safe for read by spPulseOp.toSystem only.
 	directPulse bool
 	// Copied header from [hst.Config]. Safe for read by spFilesystemOp.toSystem only.
@@ -187,9 +189,8 @@ type outcomeStateSys struct {
 func (s *outcomeState) newSys(config *hst.Config, sys *system.I) *outcomeStateSys {
 	return &outcomeStateSys{
 		appId: config.ID, et: config.Enablements.Unwrap(),
-		directWayland: config.DirectWayland, directPulse: config.DirectPulse,
-		extraPerms: config.ExtraPerms,
-		sessionBus: config.SessionBus, systemBus: config.SystemBus,
+		directWayland: config.DirectWayland, directPipeWire: config.DirectPipeWire, directPulse: config.DirectPulse,
+		extraPerms: config.ExtraPerms, sessionBus: config.SessionBus, systemBus: config.SystemBus,
 		sys: sys, outcomeState: s,
 	}
 }
@@ -256,6 +257,10 @@ type outcomeStateParams struct {
 	// Populated by spRuntimeOp.
 	runtimeDir *check.Absolute
 
+	// Path to pipewire-pulse server.
+	// Populated by spPipeWireOp if DirectPipeWire is false.
+	pipewirePulsePath *check.Absolute
+
 	as hst.ApplyState
 	*outcomeState
 }
@@ -295,7 +300,7 @@ func (state *outcomeStateSys) toSystem() error {
 		// optional via enablements
 		&spWaylandOp{},
 		&spX11Op{},
-		spPipeWireOp{},
+		&spPipeWireOp{},
 		&spPulseOp{},
 		&spDBusOp{},
 

internal/outcome/run_test.go

@@ -68,7 +68,11 @@ func TestOutcomeRun(t *testing.T) {
 			).
 
 			// spPipeWireOp
-			PipeWire(m("/tmp/hakurei.0/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/pipewire")).
+			PipeWire(
+				m("/tmp/hakurei.0/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/pipewire"),
+				"org.chromium.Chromium",
+				"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
+			).
 
 			// spDBusOp
 			MustProxyDBus(
@@ -96,7 +100,6 @@ func TestOutcomeRun(t *testing.T) {
 				"GOOGLE_DEFAULT_CLIENT_ID=77185425430.apps.googleusercontent.com",
 				"GOOGLE_DEFAULT_CLIENT_SECRET=OTJgUOQcT7lO7GsGZq2G4IlT",
 				"HOME=/data/data/org.chromium.Chromium",
-				"PIPEWIRE_REMOTE=/run/user/1971/pipewire-0",
 				"SHELL=/run/current-system/sw/bin/zsh",
 				"TERM=xterm-256color",
 				"USER=chronos",
@@ -146,9 +149,6 @@ func TestOutcomeRun(t *testing.T) {
 				// spWaylandOp
 				Bind(m("/tmp/hakurei.0/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/wayland"), m("/run/user/1971/wayland-0"), 0).
 
-				// spPipeWireOp
-				Bind(m("/tmp/hakurei.0/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/pipewire"), m("/run/user/1971/pipewire-0"), 0).
-
 				// spDBusOp
 				Bind(m("/tmp/hakurei.0/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/bus"), m("/run/user/1971/bus"), 0).
 				Bind(m("/tmp/hakurei.0/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/system_bus_socket"), m("/var/run/dbus/system_bus_socket"), 0).
@@ -170,7 +170,7 @@ func TestOutcomeRun(t *testing.T) {
 				Remount(fhs.AbsRoot, syscall.MS_RDONLY),
 		}},
 
-		{"nixos permissive defaults no enablements", new(stubNixOS), &hst.Config{Container: &hst.ContainerConfig{
+		{"nixos permissive defaults no enablements", new(stubNixOS), &hst.Config{DirectPipeWire: true, Container: &hst.ContainerConfig{
 			Filesystem: []hst.FilesystemConfigJSON{
 				{FilesystemConfig: &hst.FSBind{
 					Target:  fhs.AbsRoot,
@@ -252,6 +252,8 @@ func TestOutcomeRun(t *testing.T) {
 		}},
 
 		{"nixos permissive defaults chromium", new(stubNixOS), &hst.Config{
+			DirectPipeWire: true,
+
 			ID:       "org.chromium.Chromium",
 			Identity: 9,
 			Groups:   []string{"video"},
@@ -335,7 +337,7 @@ func TestOutcomeRun(t *testing.T) {
 			Ensure(m("/tmp/hakurei.0/tmpdir/9"), 01700).UpdatePermType(system.User, m("/tmp/hakurei.0/tmpdir/9"), acl.Read, acl.Write, acl.Execute).
 			Ephemeral(system.Process, m("/tmp/hakurei.0/ebf083d1b175911782d413369b64ce7c"), 0711).
 			Wayland(m("/tmp/hakurei.0/ebf083d1b175911782d413369b64ce7c/wayland"), m("/run/user/1971/wayland-0"), "org.chromium.Chromium", "ebf083d1b175911782d413369b64ce7c").
-			PipeWire(m("/tmp/hakurei.0/ebf083d1b175911782d413369b64ce7c/pipewire")).
+			PipeWire(m("/tmp/hakurei.0/ebf083d1b175911782d413369b64ce7c/pipewire"), "org.chromium.Chromium", "ebf083d1b175911782d413369b64ce7c").
 			MustProxyDBus(&hst.BusConfig{
 				Talk: []string{
 					"org.freedesktop.Notifications",
@@ -422,6 +424,8 @@ func TestOutcomeRun(t *testing.T) {
 		}},
 
 		{"nixos chromium direct wayland", new(stubNixOS), &hst.Config{
+			DirectPipeWire: true,
+
 			ID:          "org.chromium.Chromium",
 			Enablements: hst.NewEnablements(hst.EWayland | hst.EDBus | hst.EPipeWire | hst.EPulse),
 			Container: &hst.ContainerConfig{
@@ -486,7 +490,7 @@ func TestOutcomeRun(t *testing.T) {
 			Ensure(m("/run/user/1971/hakurei"), 0700).UpdatePermType(system.User, m("/run/user/1971/hakurei"), acl.Execute).
 			UpdatePermType(hst.EWayland, m("/run/user/1971/wayland-0"), acl.Read, acl.Write, acl.Execute).
 			Ephemeral(system.Process, m("/tmp/hakurei.0/8e2c76b066dabe574cf073bdb46eb5c1"), 0711).
-			PipeWire(m("/tmp/hakurei.0/8e2c76b066dabe574cf073bdb46eb5c1/pipewire")).
+			PipeWire(m("/tmp/hakurei.0/8e2c76b066dabe574cf073bdb46eb5c1/pipewire"), "org.chromium.Chromium", "8e2c76b066dabe574cf073bdb46eb5c1").
 			MustProxyDBus(&hst.BusConfig{
 				Talk: []string{
 					"org.freedesktop.FileManager1", "org.freedesktop.Notifications",
@@ -879,6 +883,16 @@ func (k *stubNixOS) lookupGroupId(name string) (string, error) {
 	}
 }
 
+func (k *stubNixOS) lookPath(file string) (string, error) {
+	switch file {
+	case "pipewire-pulse":
+		return "/run/current-system/sw/bin/pipewire-pulse", nil
+
+	default:
+		panic(fmt.Sprintf("unexpected file %q", file))
+	}
+}
+
 func (k *stubNixOS) cmdOutput(cmd *exec.Cmd) ([]byte, error) {
 	switch cmd.Path {
 	case "/proc/nonexistent/hsu":

internal/outcome/shim.go

@@ -14,9 +14,12 @@ import (
 	"time"
 
 	"hakurei.app/container"
+	"hakurei.app/container/check"
+	"hakurei.app/container/fhs"
 	"hakurei.app/container/seccomp"
 	"hakurei.app/container/std"
 	"hakurei.app/hst"
+	"hakurei.app/internal/pipewire"
 	"hakurei.app/message"
 )
 
@@ -83,6 +86,55 @@ func Shim(msg message.Msg) {
 	shimEntrypoint(direct{msg})
 }
 
+// A shimPrivate holds state of the private work directory owned by shim.
+type shimPrivate struct {
+	// Path to directory if created.
+	pathname *check.Absolute
+
+	k  syscallDispatcher
+	id *stringPair[hst.ID]
+}
+
+// unwrap returns the underlying pathname.
+func (sp *shimPrivate) unwrap() *check.Absolute {
+	if sp.pathname == nil {
+		if a, err := check.NewAbs(sp.k.tempdir()); err != nil {
+			sp.k.fatal(err)
+			panic("unreachable")
+		} else {
+			pathname := a.Append(".hakurei-shim-" + sp.id.String())
+			sp.k.getMsg().Verbosef("creating private work directory %q", pathname)
+			if err = sp.k.mkdir(pathname.String(), 0700); err != nil {
+				sp.k.fatal(err)
+				panic("unreachable")
+			}
+			sp.pathname = pathname
+			return sp.unwrap()
+		}
+	} else {
+		return sp.pathname
+	}
+}
+
+// String returns the absolute pathname to the directory held by shimPrivate.
+func (sp *shimPrivate) String() string { return sp.unwrap().String() }
+
+// destroy removes the directory held by shimPrivate.
+func (sp *shimPrivate) destroy() {
+	defer func() { sp.pathname = nil }()
+	if sp.pathname != nil {
+		sp.k.getMsg().Verbosef("destroying private work directory %q", sp.pathname)
+		if err := sp.k.removeAll(sp.pathname.String()); err != nil {
+			sp.k.getMsg().GetLogger().Println(err)
+		}
+	}
+}
+
+const (
+	// shimPipeWireTimeout is the duration pipewire-pulse is allowed to run before its socket becomes available.
+	shimPipeWireTimeout = 5 * time.Second
+)
+
 func shimEntrypoint(k syscallDispatcher) {
 	msg := k.getMsg()
 	if msg == nil {
@@ -208,6 +260,7 @@ func shimEntrypoint(k syscallDispatcher) {
 
 	ctx, stop := k.notifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
 	cancelContainer.Store(&stop)
+	sp := shimPrivate{k: k, id: state.id}
 	z := container.New(ctx, msg)
 	z.Params = *stateParams.params
 	z.Stdin, z.Stdout, z.Stderr = os.Stdin, os.Stdout, os.Stderr
@@ -215,6 +268,79 @@ func shimEntrypoint(k syscallDispatcher) {
 	// bounds and default enforced in finalise.go
 	z.WaitDelay = state.Shim.WaitDelay
 
+	if stateParams.pipewirePulsePath != nil {
+		zpw := container.NewCommand(ctx, msg, stateParams.pipewirePulsePath, pipewirePulseName)
+		zpw.Hostname = "hakurei-" + pipewirePulseName
+		zpw.SeccompFlags |= seccomp.AllowMultiarch
+		zpw.SeccompPresets |= std.PresetStrict
+		zpw.Env = []string{
+			// pipewire SecurityContext socket path
+			pipewire.Remote + "=" + stateParams.instancePath().Append("pipewire").String(),
+			// pipewire-pulse socket directory path
+			envXDGRuntimeDir + "=" + sp.String(),
+		}
+		if msg.IsVerbose() {
+			zpw.Stdin, zpw.Stdout, zpw.Stderr = os.Stdin, os.Stdout, os.Stderr
+		}
+		zpw.
+			Bind(fhs.AbsRoot, fhs.AbsRoot, 0).
+			Bind(sp.unwrap(), sp.unwrap(), std.BindWritable).
+			Proc(fhs.AbsProc).Dev(fhs.AbsDev, true)
+		socketPath := sp.unwrap().Append("pulse", "native")
+		innerSocketPath := stateParams.runtimeDir.Append("pulse", "native")
+
+		if err := k.containerStart(zpw); err != nil {
+			sp.destroy()
+			printMessageError(func(v ...any) { k.fatal(fmt.Sprintln(v...)) },
+				"cannot start "+pipewirePulseName+" container:", err)
+		}
+		if err := k.containerServe(zpw); err != nil {
+			sp.destroy()
+			printMessageError(func(v ...any) { k.fatal(fmt.Sprintln(v...)) },
+				"cannot configure "+pipewirePulseName+" container:", err)
+		}
+
+		done := make(chan error, 1)
+		k.new(func(k syscallDispatcher, msg message.Msg) { done <- k.containerWait(zpw) })
+
+		socketTimer := time.NewTimer(shimPipeWireTimeout)
+		for {
+			select {
+			case <-socketTimer.C:
+				sp.destroy()
+				k.fatal(pipewirePulseName + " exceeded deadline before socket appeared")
+				break
+
+			case err := <-done:
+				var exitError *exec.ExitError
+				if !errors.As(err, &exitError) {
+					msg.Verbosef("cannot wait: %v", err)
+					k.exit(127)
+				}
+				sp.destroy()
+				k.fatal(pipewirePulseName + " " + exitError.ProcessState.String())
+				break
+
+			default:
+				if _, err := k.stat(socketPath.String()); err != nil {
+					if !errors.Is(err, os.ErrNotExist) {
+						sp.destroy()
+						k.fatal(err)
+						break
+					}
+
+					time.Sleep(500 * time.Microsecond)
+					continue
+				}
+			}
+
+			break
+		}
+
+		z.Bind(socketPath, innerSocketPath, 0)
+		z.Env = append(z.Env, "PULSE_SERVER=unix:"+innerSocketPath.String())
+	}
+
 	if err := k.containerStart(z); err != nil {
 		var f func(v ...any)
 		if logger := msg.GetLogger(); logger != nil {
@@ -225,9 +351,11 @@ func shimEntrypoint(k syscallDispatcher) {
 			}
 		}
 		printMessageError(f, "cannot start container:", err)
+		sp.destroy()
 		k.exit(hst.ExitFailure)
 	}
 	if err := k.containerServe(z); err != nil {
+		sp.destroy()
 		printMessageError(func(v ...any) { k.fatal(fmt.Sprintln(v...)) },
 			"cannot configure container:", err)
 	}
@@ -236,10 +364,13 @@ func shimEntrypoint(k syscallDispatcher) {
 		seccomp.Preset(std.PresetStrict, seccomp.AllowMultiarch),
 		seccomp.AllowMultiarch,
 	); err != nil {
+		sp.destroy()
 		k.fatalf("cannot load syscall filter: %v", err)
 	}
 
 	if err := k.containerWait(z); err != nil {
+		sp.destroy()
+
 		var exitError *exec.ExitError
 		if !errors.As(err, &exitError) {
 			if errors.Is(err, context.Canceled) {
@@ -250,4 +381,5 @@ func shimEntrypoint(k syscallDispatcher) {
 		}
 		k.exit(exitError.ExitCode())
 	}
+	sp.destroy()
 }

internal/outcome/sppipewire.go

@@ -3,29 +3,51 @@ package outcome
 import (
 	"encoding/gob"
 
+	"hakurei.app/container/check"
 	"hakurei.app/hst"
 	"hakurei.app/internal/pipewire"
 )
 
-func init() { gob.Register(spPipeWireOp{}) }
+const pipewirePulseName = "pipewire-pulse"
+
+func init() { gob.Register(new(spPipeWireOp)) }
 
 // spPipeWireOp exports the PipeWire server to the container via SecurityContext.
 // Runs after spRuntimeOp.
-type spPipeWireOp struct{}
+type spPipeWireOp struct {
+	// Path to pipewire-pulse server. Populated during toSystem if DirectPipeWire is false.
+	CompatServerPath *check.Absolute
+}
 
-func (s spPipeWireOp) toSystem(state *outcomeStateSys) error {
+func (s *spPipeWireOp) toSystem(state *outcomeStateSys) error {
 	if state.et&hst.EPipeWire == 0 {
 		return errNotEnabled
 	}
+	if !state.directPipeWire {
+		if n, err := state.k.lookPath(pipewirePulseName); err != nil {
+			return &hst.AppError{Step: "look up " + pipewirePulseName, Err: err}
+		} else if s.CompatServerPath, err = check.NewAbs(n); err != nil {
+			return err
+		}
+	}
 
-	state.sys.PipeWire(state.instance().Append("pipewire"))
+	appId := state.appId
+	if appId == "" {
+		// use instance ID in case app id is not set
+		appId = "app.hakurei." + state.id.String()
+	}
+	state.sys.PipeWire(state.instance().Append("pipewire"), appId, state.id.String())
 	return nil
 }
 
-func (s spPipeWireOp) toContainer(state *outcomeStateParams) error {
-	innerPath := state.runtimeDir.Append(pipewire.PW_DEFAULT_REMOTE)
-	state.env[pipewire.Remote] = innerPath.String()
-	state.params.Bind(state.instancePath().Append("pipewire"), innerPath, 0)
+func (s *spPipeWireOp) toContainer(state *outcomeStateParams) error {
+	if s.CompatServerPath == nil {
+		innerPath := state.runtimeDir.Append(pipewire.PW_DEFAULT_REMOTE)
+		state.env[pipewire.Remote] = innerPath.String()
+		state.params.Bind(state.instancePath().Append("pipewire"), innerPath, 0)
+	}
 
+	// pipewire-pulse behaviour implemented in shim.go
+	state.pipewirePulsePath = s.CompatServerPath
 	return nil
 }

internal/outcome/sppipewire_test.go

@@ -16,7 +16,7 @@ func TestSpPipeWireOp(t *testing.T) {
 
 	checkOpBehaviour(t, []opBehaviourTestCase{
 		{"not enabled", func(bool, bool) outcomeOp {
-			return spPipeWireOp{}
+			return new(spPipeWireOp)
 		}, func() *hst.Config {
 			c := hst.Template()
 			*c.Enablements = 0
@@ -24,13 +24,19 @@ func TestSpPipeWireOp(t *testing.T) {
 		}, nil, nil, nil, nil, errNotEnabled, nil, nil, nil, nil, nil},
 
 		{"success", func(bool, bool) outcomeOp {
-			return spPipeWireOp{}
-		}, hst.Template, nil, []stub.Call{}, newI().
+			return new(spPipeWireOp)
+		}, func() *hst.Config {
+			c := hst.Template()
+			c.DirectPipeWire = true
+			return c
+		}, nil, []stub.Call{}, newI().
 			// state.instance
 			Ephemeral(system.Process, m(wantInstancePrefix), 0711).
 			// toSystem
 			PipeWire(
-				m(wantInstancePrefix + "/pipewire"),
+				m(wantInstancePrefix+"/pipewire"),
+				"org.chromium.Chromium",
+				"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
 			), sysUsesInstance(nil), nil, insertsOps(afterSpRuntimeOp(nil)), []stub.Call{
 			// this op configures the container state and does not make calls during toContainer
 		}, &container.Params{

internal/pipewire/client.go

@@ -103,6 +103,8 @@ type Client struct {
 
 	// Populated by [CoreBoundProps] events targeting [Client].
 	Properties SPADict `json:"props"`
+
+	noRemove
 }
 
 func (client *Client) consume(opcode byte, files []int, unmarshal func(v any)) error {
@@ -113,7 +115,7 @@ func (client *Client) consume(opcode byte, files []int, unmarshal func(v any)) e
 		return nil
 
 	default:
-		return &UnsupportedOpcodeError{opcode, client.String()}
+		panic(&UnsupportedOpcodeError{opcode, client.String()})
 	}
 }
 

internal/pipewire/core.go

@@ -40,13 +40,14 @@ const (
 	PW_CORE_EVENT_ADD_MEM
 	PW_CORE_EVENT_REMOVE_MEM
 	PW_CORE_EVENT_BOUND_PROPS
-	PW_CORE_EVENT_NUM
 
+	PW_CORE_EVENT_NUM
 	PW_VERSION_CORE_EVENTS = 1
 )
 
 const (
 	PW_CORE_METHOD_ADD_LISTENER = iota
+
 	PW_CORE_METHOD_HELLO
 	PW_CORE_METHOD_SYNC
 	PW_CORE_METHOD_PONG
@@ -54,25 +55,26 @@ const (
 	PW_CORE_METHOD_GET_REGISTRY
 	PW_CORE_METHOD_CREATE_OBJECT
 	PW_CORE_METHOD_DESTROY
-	PW_CORE_METHOD_NUM
 
+	PW_CORE_METHOD_NUM
 	PW_VERSION_CORE_METHODS = 0
 )
 
 const (
 	PW_REGISTRY_EVENT_GLOBAL = iota
 	PW_REGISTRY_EVENT_GLOBAL_REMOVE
-	PW_REGISTRY_EVENT_NUM
 
+	PW_REGISTRY_EVENT_NUM
 	PW_VERSION_REGISTRY_EVENTS = 0
 )
 
 const (
 	PW_REGISTRY_METHOD_ADD_LISTENER = iota
+
 	PW_REGISTRY_METHOD_BIND
 	PW_REGISTRY_METHOD_DESTROY
-	PW_REGISTRY_METHOD_NUM
 
+	PW_REGISTRY_METHOD_NUM
 	PW_VERSION_REGISTRY_METHODS = 0
 )
 
@@ -266,6 +268,31 @@ type CoreErrorEvent struct{ CoreError }
 // Opcode satisfies [Message] with a constant value.
 func (c *CoreErrorEvent) Opcode() byte { return PW_CORE_EVENT_ERROR }
 
+// The CoreRemoveId event is used internally by the object ID management logic.
+//
+// When a client deletes an object, the server will send this event to acknowledge
+// that it has seen the delete request. When the client receives this event, it
+// will know that it can safely reuse the object ID.
+type CoreRemoveId struct {
+	// A proxy id that was removed.
+	ID Int `json:"id"`
+}
+
+// Opcode satisfies [Message] with a constant value.
+func (c *CoreRemoveId) Opcode() byte { return PW_CORE_EVENT_REMOVE_ID }
+
+// FileCount satisfies [Message] with a constant value.
+func (c *CoreRemoveId) FileCount() Int { return 0 }
+
+// Size satisfies [KnownSize] with a constant value.
+func (c *CoreRemoveId) Size() Word { return SizePrefix + Size(SizeInt) }
+
+// MarshalBinary satisfies [encoding.BinaryMarshaler] via [Marshal].
+func (c *CoreRemoveId) MarshalBinary() ([]byte, error) { return Marshal(c) }
+
+// UnmarshalBinary satisfies [encoding.BinaryUnmarshaler] via [Unmarshal].
+func (c *CoreRemoveId) UnmarshalBinary(data []byte) error { return Unmarshal(data, c) }
+
 // The CoreBoundProps event is emitted when a local object ID is bound to a global ID.
 // It is emitted before the global becomes visible in the registry.
 type CoreBoundProps struct {
@@ -299,13 +326,96 @@ func (c *CoreBoundProps) UnmarshalBinary(data []byte) error { return Unmarshal(d
 
 // ErrBadBoundProps is returned when a [CoreBoundProps] event targeting a proxy
 // that should never be targeted is received and processed.
-var ErrBadBoundProps = errors.New("attempted to store bound props on proxy that should never be targeted")
+var ErrBadBoundProps = errors.New("attempting to store bound props on a proxy that should never be targeted")
 
 // noAck is embedded by proxies that are never targeted by [CoreBoundProps].
 type noAck struct{}
 
 // setBoundProps should never be called as this proxy should never be targeted by [CoreBoundProps].
-func (noAck) setBoundProps(*CoreBoundProps) error { return ErrBadBoundProps }
+func (noAck) setBoundProps(*CoreBoundProps) error { panic(ErrBadBoundProps) }
+
+// ErrBadRemove is returned when a [CoreRemoveId] event targeting a proxy
+// that should never be targeted is received and processed.
+var ErrBadRemove = errors.New("attempting to remove a proxy that should never be targeted")
+
+// noRemove is embedded by proxies that are never targeted by [CoreRemoveId].
+type noRemove struct{}
+
+// remove should never be called as this proxy should never be targeted by [CoreRemoveId].
+func (noRemove) remove() error { panic(ErrBadRemove) }
+
+// ErrInvalidRemove is returned when a proxy is somehow removed twice. This is only reached for
+// an implementation error as the proxy struct should no longer be reachable after the first call.
+var ErrInvalidRemove = errors.New("attempting to remove an already freed proxy")
+
+// removable is embedded by proxies that can be targeted by [CoreRemoveId] and requires no cleanup.
+type removable bool
+
+// remove checks against removal of a freed proxy and marks the proxy as removed.
+func (s *removable) remove() error {
+	if *s {
+		panic(ErrInvalidRemove)
+	}
+	*s = true
+	return nil
+}
+
+// ErrProxyDestroyed is returned when attempting to use a proxy method when the underlying
+// proxy has already been targeted by a [CoreRemoveId] event.
+var ErrProxyDestroyed = errors.New("underlying proxy has been removed")
+
+// checkDestroy returns [ErrProxyDestroyed] if the current proxy has been destroyed.
+// Must be called at the beginning of any exported method of a proxy embedding removable.
+func (s *removable) checkDestroy() error {
+	if *s {
+		// not fatal: the caller is allowed to recover from this and allocate a new proxy
+		return ErrProxyDestroyed
+	}
+	return nil
+}
+
+// mustCheckDestroy calls checkDestroy and panics if a non-nil error is returned.
+// This is useful for non-exported methods as they should become unreachable.
+func (s *removable) mustCheckDestroy() {
+	if err := s.checkDestroy(); err != nil {
+		panic(err)
+	}
+}
+
+// destructible is embedded by proxies that can be targeted by the [CoreRemoveId] event and the
+// [CoreDestroy] method and requires no cleanup. destructible purposefully does not override
+// removable.mustCheckDestroy because it is used by unexported methods called during event handling
+// and are exempt from the destruction check.
+type destructible struct {
+	destroyed bool
+
+	removable
+}
+
+// checkDestroy overrides removable.checkDestroy to also check the destroyed field.
+func (s *destructible) checkDestroy() error {
+	if s.destroyed {
+		return ErrProxyDestroyed
+	}
+	if err := s.removable.checkDestroy(); err != nil {
+		return err
+	}
+	return nil
+}
+
+// destroy calls removable.checkDestroy then queues a [CoreDestroy] event if it succeeds.
+func (s *destructible) destroy(ctx *Context, id Int) error {
+	if err := s.checkDestroy(); err != nil {
+		return err
+	}
+	l := len(ctx.pendingDestruction)
+	ctx.pendingDestruction[id] = struct{}{}
+	if len(ctx.pendingDestruction) != l+1 {
+		return ErrProxyDestroyed
+	}
+	s.destroyed = true
+	return ctx.GetCore().destroy(id)
+}
 
 // An InconsistentIdError describes an inconsistent state where the server claims an impossible
 // proxy or global id. This is only generated by the [CoreBoundProps] event.
@@ -349,10 +459,10 @@ func (c *CoreHello) MarshalBinary() ([]byte, error) { return Marshal(c) }
 // UnmarshalBinary satisfies [encoding.BinaryUnmarshaler] via [Unmarshal].
 func (c *CoreHello) UnmarshalBinary(data []byte) error { return Unmarshal(data, c) }
 
-// coreHello queues a [CoreHello] message for the PipeWire server.
-// This method should not be called directly, the New function queues this message.
-func (ctx *Context) coreHello() error {
-	return ctx.writeMessage(
+// hello queues a [CoreHello] message for the PipeWire server.
+// This method should not be called directly, the [New] function queues this message.
+func (core *Core) hello() error {
+	return core.ctx.writeMessage(
 		PW_ID_CORE,
 		&CoreHello{PW_VERSION_CORE},
 	)
@@ -388,12 +498,12 @@ func (c *CoreSync) MarshalBinary() ([]byte, error) { return Marshal(c) }
 // UnmarshalBinary satisfies [encoding.BinaryUnmarshaler] via [Unmarshal].
 func (c *CoreSync) UnmarshalBinary(data []byte) error { return Unmarshal(data, c) }
 
-// coreSync queues a [CoreSync] message for the PipeWire server.
+// sync queues a [CoreSync] message for the PipeWire server.
 // This is not safe to use directly, callers should use Sync instead.
-func (ctx *Context) coreSync(id Int) error {
-	return ctx.writeMessage(
+func (core *Core) sync(id Int) error {
+	return core.ctx.writeMessage(
 		PW_ID_CORE,
-		&CoreSync{id, CoreSyncSequenceOffset + Int(ctx.sequence)},
+		&CoreSync{id, CoreSyncSequenceOffset + Int(core.ctx.sequence)},
 	)
 }
 
@@ -410,7 +520,7 @@ const (
 // Sync queues a [CoreSync] message for the PipeWire server and initiates a Roundtrip.
 func (core *Core) Sync() error {
 	core.done = false
-	if err := core.ctx.coreSync(roundtripSyncID); err != nil {
+	if err := core.sync(roundtripSyncID); err != nil {
 		return err
 	}
 	deadline := time.Now().Add(syncTimeout)
@@ -429,6 +539,10 @@ func (core *Core) Sync() error {
 		core.ctx.closeReceivedFiles()
 		return &ProxyFatalError{Err: UnacknowledgedProxyError(slices.Collect(maps.Keys(core.ctx.pendingIds))), ProxyErrs: core.ctx.cloneAsProxyErrors()}
 	}
+	if len(core.ctx.pendingDestruction) != 0 {
+		core.ctx.closeReceivedFiles()
+		return &ProxyFatalError{Err: UnacknowledgedProxyDestructionError(slices.Collect(maps.Keys(core.ctx.pendingDestruction))), ProxyErrs: core.ctx.cloneAsProxyErrors()}
+	}
 	return core.ctx.doSyncComplete()
 }
 
@@ -497,6 +611,89 @@ func (ctx *Context) GetRegistry() (*Registry, error) {
 	)
 }
 
+// CoreCreateObject is sent when the client requests to create a
+// new object from a factory of a certain type.
+//
+// The client allocates a new_id for the proxy. The server will
+// allocate a new resource with the same new_id and from then on,
+// Methods and Events will be exchanged between the new object of
+// the given type.
+type CoreCreateObject struct {
+	// The name of a server factory object to use.
+	FactoryName String `json:"factory_name"`
+	// The type of the object to create, this is also the type of
+	// the interface of the new_id proxy.
+	Type String `json:"type"`
+	// Undocumented, assumed to be the local version of the proxy.
+	Version Int `json:"version"`
+	// Extra properties to create the object.
+	Properties *SPADict `json:"props"`
+	// The proxy id of the new object.
+	NewID Int `json:"new_id"`
+}
+
+// Opcode satisfies [Message] with a constant value.
+func (c *CoreCreateObject) Opcode() byte { return PW_CORE_METHOD_CREATE_OBJECT }
+
+// FileCount satisfies [Message] with a constant value.
+func (c *CoreCreateObject) FileCount() Int { return 0 }
+
+// Size satisfies [KnownSize] with a value computed at runtime.
+func (c *CoreCreateObject) Size() Word {
+	return SizePrefix +
+		SizeString[Word](c.FactoryName) +
+		SizeString[Word](c.Type) +
+		Size(SizeInt) +
+		c.Properties.Size() +
+		Size(SizeInt)
+}
+
+// MarshalBinary satisfies [encoding.BinaryMarshaler] via [Marshal].
+func (c *CoreCreateObject) MarshalBinary() ([]byte, error) { return Marshal(c) }
+
+// UnmarshalBinary satisfies [encoding.BinaryUnmarshaler] via [Unmarshal].
+func (c *CoreCreateObject) UnmarshalBinary(data []byte) error { return Unmarshal(data, c) }
+
+// createObject queues a [CoreCreateObject] message for the PipeWire server.
+// This is not safe to use directly, callers should use typed wrapper methods on [Registry] instead.
+func (core *Core) createObject(factoryName, typeName String, version Int, props SPADict, newId Int) error {
+	return core.ctx.writeMessage(
+		PW_ID_CORE,
+		&CoreCreateObject{factoryName, typeName, version, &props, newId},
+	)
+}
+
+// CoreDestroy is sent when the client requests to destroy an object.
+type CoreDestroy struct {
+	// The proxy id of the object to destroy.
+	ID Int `json:"id"`
+}
+
+// Opcode satisfies [Message] with a constant value.
+func (c *CoreDestroy) Opcode() byte { return PW_CORE_METHOD_DESTROY }
+
+// FileCount satisfies [Message] with a constant value.
+func (c *CoreDestroy) FileCount() Int { return 0 }
+
+// Size satisfies [KnownSize] with a constant value.
+func (c *CoreDestroy) Size() Word { return SizePrefix + Size(SizeInt) }
+
+// MarshalBinary satisfies [encoding.BinaryMarshaler] via [Marshal].
+func (c *CoreDestroy) MarshalBinary() ([]byte, error) { return Marshal(c) }
+
+// UnmarshalBinary satisfies [encoding.BinaryUnmarshaler] via [Unmarshal].
+func (c *CoreDestroy) UnmarshalBinary(data []byte) error { return Unmarshal(data, c) }
+
+// destroy queues a [CoreDestroy] message for the PipeWire server.
+// This is not safe to use directly, callers should use the exported method
+// on the proxy implementation instead.
+func (core *Core) destroy(id Int) error {
+	return core.ctx.writeMessage(
+		PW_ID_CORE,
+		&CoreDestroy{id},
+	)
+}
+
 // A RegistryGlobal event is emitted to notify a client about a new global object.
 type RegistryGlobal struct {
 	// The global id.
@@ -533,6 +730,30 @@ func (c *RegistryGlobal) MarshalBinary() ([]byte, error) { return Marshal(c) }
 // UnmarshalBinary satisfies [encoding.BinaryUnmarshaler] via [Unmarshal].
 func (c *RegistryGlobal) UnmarshalBinary(data []byte) error { return Unmarshal(data, c) }
 
+// A RegistryGlobalRemove event is emitted when a global with id was removed.
+type RegistryGlobalRemove struct {
+	// The global id that was removed.
+	ID Int `json:"id"`
+}
+
+// Opcode satisfies [Message] with a constant value.
+func (c *RegistryGlobalRemove) Opcode() byte { return PW_REGISTRY_EVENT_GLOBAL_REMOVE }
+
+// FileCount satisfies [Message] with a constant value.
+func (c *RegistryGlobalRemove) FileCount() Int { return 0 }
+
+// Size satisfies [KnownSize] with a constant value.
+func (c *RegistryGlobalRemove) Size() Word {
+	return SizePrefix +
+		Size(SizeInt)
+}
+
+// MarshalBinary satisfies [encoding.BinaryMarshaler] via [Marshal].
+func (c *RegistryGlobalRemove) MarshalBinary() ([]byte, error) { return Marshal(c) }
+
+// UnmarshalBinary satisfies [encoding.BinaryUnmarshaler] via [Unmarshal].
+func (c *RegistryGlobalRemove) UnmarshalBinary(data []byte) error { return Unmarshal(data, c) }
+
 // RegistryBind is sent when the client requests to bind to the
 // global object with id and use the client proxy with new_id as
 // the proxy. After this call, methods can be sent to the remote
@@ -584,10 +805,70 @@ func (registry *Registry) bind(proxy eventProxy, id, version Int) (Int, error) {
 	)
 }
 
+// RegistryDestroy is sent to try to destroy the global object with id.
+// This might fail when the client does not have permission.
+type RegistryDestroy struct {
+	// The global id to destroy.
+	ID Int `json:"id"`
+}
+
+// Opcode satisfies [Message] with a constant value.
+func (c *RegistryDestroy) Opcode() byte { return PW_REGISTRY_METHOD_DESTROY }
+
+// FileCount satisfies [Message] with a constant value.
+func (c *RegistryDestroy) FileCount() Int { return 0 }
+
+// Size satisfies [KnownSize] with a constant value.
+func (c *RegistryDestroy) Size() Word {
+	return SizePrefix +
+		Size(SizeInt)
+}
+
+// MarshalBinary satisfies [encoding.BinaryMarshaler] via [Marshal].
+func (c *RegistryDestroy) MarshalBinary() ([]byte, error) { return Marshal(c) }
+
+// UnmarshalBinary satisfies [encoding.BinaryUnmarshaler] via [Unmarshal].
+func (c *RegistryDestroy) UnmarshalBinary(data []byte) error { return Unmarshal(data, c) }
+
+// destroy queues a [RegistryDestroy] message for the PipeWire server.
+func (registry *Registry) destroy(id Int) error {
+	return registry.ctx.writeMessage(
+		registry.ID,
+		&RegistryDestroy{id},
+	)
+}
+
+// Destroy tries to destroy the global object with id.
+func (registry *Registry) Destroy(id Int) (err error) {
+	asCoreError := registry.ctx.expectsCoreError(registry.ID, &err)
+	if err != nil {
+		return
+	}
+	if err = registry.destroy(id); err != nil {
+		return err
+	}
+	if err = registry.ctx.GetCore().Sync(); err == nil {
+		return nil
+	}
+
+	if coreError := asCoreError(); coreError == nil {
+		return
+	} else {
+		switch syscall.Errno(-coreError.Result) {
+		case syscall.EPERM:
+			return &PermissionError{registry.ID, coreError.Message}
+
+		default:
+			return coreError
+		}
+	}
+}
+
 // An UnsupportedObjectTypeError is the name of a type not known by the server [Registry].
 type UnsupportedObjectTypeError string
 
-func (e UnsupportedObjectTypeError) Error() string { return "unsupported object type " + string(e) }
+func (e UnsupportedObjectTypeError) Error() string   { return "unsupported object type " + string(e) }
+func (e UnsupportedObjectTypeError) Message() string { return e.Error() }
 
 // Core holds state of [PW_TYPE_INTERFACE_Core].
 type Core struct {
@@ -598,22 +879,24 @@ type Core struct {
 	done bool
 
 	ctx *Context
+
 	noAck
+	noRemove
 }
 
 // ErrUnexpectedDone is a [CoreDone] event with unexpected values.
 var ErrUnexpectedDone = errors.New("multiple Core::Done events targeting Core::Sync")
 
-// An UnknownBoundIdError describes the server claiming to have bound a proxy id that was never allocated.
-type UnknownBoundIdError[E any] struct {
+// An UnknownProxyIdError describes an event targeting a proxy id that was never allocated.
+type UnknownProxyIdError[E any] struct {
 	// Offending id decoded from Data.
 	Id Int
 	// Event received from the server.
 	Event E
 }
 
-func (e *UnknownBoundIdError[E]) Error() string {
-	return "unknown bound proxy id " + strconv.Itoa(int(e.Id))
+func (e *UnknownProxyIdError[E]) Error() string {
+	return "unknown proxy id " + strconv.Itoa(int(e.Id))
 }
 
 // An InvalidPingError is a [CorePing] event targeting a proxy id that was never allocated.
@@ -668,6 +951,19 @@ func (core *Core) consume(opcode byte, files []int, unmarshal func(v any)) error
 		unmarshal(&coreError)
 		return &coreError
 
+	case PW_CORE_EVENT_REMOVE_ID:
+		var coreRemoveId CoreRemoveId
+		unmarshal(&coreRemoveId)
+		if proxy, ok := core.ctx.proxy[coreRemoveId.ID]; !ok {
+			// this should never happen so is non-recoverable if it does
+			panic(&UnknownProxyIdError[*CoreRemoveId]{Id: coreRemoveId.ID, Event: &coreRemoveId})
+		} else {
+			delete(core.ctx.proxy, coreRemoveId.ID)
+			// not always populated so this is not checked
+			delete(core.ctx.pendingDestruction, coreRemoveId.ID)
+			return proxy.remove()
+		}
+
 	case PW_CORE_EVENT_BOUND_PROPS:
 		var boundProps CoreBoundProps
 		unmarshal(&boundProps)
@@ -675,12 +971,12 @@ func (core *Core) consume(opcode byte, files []int, unmarshal func(v any)) error
 		delete(core.ctx.pendingIds, boundProps.ID)
 		proxy, ok := core.ctx.proxy[boundProps.ID]
 		if !ok {
-			return &UnknownBoundIdError[*CoreBoundProps]{Id: boundProps.ID, Event: &boundProps}
+			return &UnknownProxyIdError[*CoreBoundProps]{Id: boundProps.ID, Event: &boundProps}
 		}
 		return proxy.setBoundProps(&boundProps)
 
 	default:
-		return &UnsupportedOpcodeError{opcode, core.String()}
+		panic(&UnsupportedOpcodeError{opcode, core.String()})
 	}
 }
 
@@ -698,7 +994,9 @@ type Registry struct {
 	Objects map[Int]RegistryGlobal `json:"objects"`
 
 	ctx *Context
+
 	noAck
+	noRemove
 }
 
 // A GlobalIDCollisionError describes a [RegistryGlobal] event stepping on a previous instance of itself.
@@ -714,6 +1012,14 @@ func (e *GlobalIDCollisionError) Error() string {
 		" stepping on previous id " + strconv.Itoa(int(e.ID)) + " for " + e.Previous.Type
 }
 
+// An UnknownGlobalIDRemoveError describes a [RegistryGlobalRemove] event announcing the removal of
+// a global id that is not yet known to [Registry] or was already deleted.
+type UnknownGlobalIDRemoveError Int
+
+func (e UnknownGlobalIDRemoveError) Error() string {
+	return "Registry::GlobalRemove event targets unknown id " + strconv.Itoa(int(e))
+}
+
 func (registry *Registry) consume(opcode byte, files []int, unmarshal func(v any)) error {
 	closeReceivedFiles(files...)
 	switch opcode {
@@ -727,8 +1033,21 @@ func (registry *Registry) consume(opcode byte, files []int, unmarshal func(v any
 		registry.Objects[global.ID] = global
 		return nil
 
+	case PW_REGISTRY_EVENT_GLOBAL_REMOVE:
+		var globalRemove RegistryGlobalRemove
+		unmarshal(&globalRemove)
+		// server emits PW_CORE_EVENT_REMOVE_ID events targeting
+		// affected proxies so they do not need to be handled here
+		l := len(registry.Objects)
+		delete(registry.Objects, globalRemove.ID)
+		if len(registry.Objects) != l-1 {
+			// this should never happen so is non-recoverable if it does
+			panic(UnknownGlobalIDRemoveError(globalRemove.ID))
+		}
+		return nil
+
 	default:
-		return &UnsupportedOpcodeError{opcode, registry.String()}
+		panic(&UnsupportedOpcodeError{opcode, registry.String()})
 	}
 }
 

internal/pipewire/core_test.go

@@ -171,7 +171,7 @@ func TestCoreError(t *testing.T) {
 			/* padding */ 0, 0, 0, 0,
 
 			/* size: 0x1b bytes */ 0x1b, 0, 0, 0,
-			/*type: String*/ 8, 0, 0, 0,
+			/* type: String */ 8, 0, 0, 0,
 
 			// value: "no permission to destroy 0\x00"
 			0x6e, 0x6f, 0x20, 0x70,
@@ -192,6 +192,24 @@ func TestCoreError(t *testing.T) {
 	}.run(t)
 }
 
+func TestCoreRemoveId(t *testing.T) {
+	t.Parallel()
+
+	encodingTestCases[pipewire.CoreRemoveId, *pipewire.CoreRemoveId]{
+		{"sample", []byte{
+			/* size: rest of data */ 0x10, 0, 0, 0,
+			/* type: Struct */ 0xe, 0, 0, 0,
+
+			/* size: 4 bytes */ 4, 0, 0, 0,
+			/* type: Int */ 4, 0, 0, 0,
+			/* value: 3 */ 3, 0, 0, 0,
+			/* padding */ 0, 0, 0, 0,
+		}, pipewire.CoreRemoveId{
+			ID: 3,
+		}, nil},
+	}.run(t)
+}
+
 func TestCoreBoundProps(t *testing.T) {
 	t.Parallel()
 
@@ -288,6 +306,83 @@ func TestCoreGetRegistry(t *testing.T) {
 	}.run(t)
 }
 
+func TestCoreCreateObject(t *testing.T) {
+	t.Parallel()
+
+	encodingTestCases[pipewire.CoreCreateObject, *pipewire.CoreCreateObject]{
+		{"sample", []byte{
+			/* size: rest of data */ 0x80, 0, 0, 0,
+			/* type: Struct */ 0xe, 0, 0, 0,
+
+			/* size: 0x13 bytes */ 0x13, 0, 0, 0,
+			/* type: String */ 8, 0, 0, 0,
+
+			// value: "spa-device-factory\x00"
+			0x73, 0x70, 0x61, 0x2d,
+			0x64, 0x65, 0x76, 0x69,
+			0x63, 0x65, 0x2d, 0x66,
+			0x61, 0x63, 0x74, 0x6f,
+			0x72, 0x79, 0, 0,
+			0, 0, 0, 0,
+
+			/* size: 0x1a bytes */ 0x1a, 0, 0, 0,
+			/* type: String */ 8, 0, 0, 0,
+
+			// value: "PipeWire:Interface:Device\x00"
+			0x50, 0x69, 0x70, 0x65,
+			0x57, 0x69, 0x72, 0x65,
+			0x3a, 0x49, 0x6e, 0x74,
+			0x65, 0x72, 0x66, 0x61,
+			0x63, 0x65, 0x3a, 0x44,
+			0x65, 0x76, 0x69, 0x63,
+			0x65, 0, 0, 0,
+			0, 0, 0, 0,
+
+			/* size: 4 bytes */ 4, 0, 0, 0,
+			/* type: Int */ 4, 0, 0, 0,
+			/* value: 3 */ 3, 0, 0, 0,
+			/* padding */ 0, 0, 0, 0,
+
+			/* size */ 0x10, 0, 0, 0,
+			/* type: Struct */ 0xe, 0, 0, 0,
+
+			/* size: 4 bytes */ 4, 0, 0, 0,
+			/* type: Int */ 4, 0, 0, 0,
+			/* value: 0 */ 0, 0, 0, 0,
+			/* padding */ 0, 0, 0, 0,
+
+			/* size: 4 bytes */ 4, 0, 0, 0,
+			/* type: Int */ 4, 0, 0, 0,
+			/* value: 0xbad */ 0xad, 0xb, 0, 0,
+			/* padding */ 0, 0, 0, 0,
+		}, pipewire.CoreCreateObject{
+			FactoryName: "spa-device-factory",
+			Type:        pipewire.PW_TYPE_INTERFACE_Device,
+			Version:     pipewire.PW_VERSION_FACTORY,
+			Properties:  &pipewire.SPADict{},
+			NewID:       0xbad,
+		}, nil},
+	}.run(t)
+}
+
+func TestCoreDestroy(t *testing.T) {
+	t.Parallel()
+
+	encodingTestCases[pipewire.CoreDestroy, *pipewire.CoreDestroy]{
+		{"sample", []byte{
+			/* size: rest of data */ 0x10, 0, 0, 0,
+			/* type: Struct */ 0xe, 0, 0, 0,
+
+			/* size: 4 bytes */ 4, 0, 0, 0,
+			/* type: Int */ 4, 0, 0, 0,
+			/* value: 3 */ 3, 0, 0, 0,
+			/* padding */ 0, 0, 0, 0,
+		}, pipewire.CoreDestroy{
+			ID: 3,
+		}, nil},
+	}.run(t)
+}
+
 func TestRegistryGlobal(t *testing.T) {
 	t.Parallel()
 
@@ -745,6 +840,23 @@ func TestRegistryGlobal(t *testing.T) {
 	}.run(t)
 }
 
+func TestRegistryGlobalRemove(t *testing.T) {
+	t.Parallel()
+
+	encodingTestCases[pipewire.RegistryGlobalRemove, *pipewire.RegistryGlobalRemove]{
+		{"sample", []byte{
+			/* size: rest of data*/ 0x10, 0, 0, 0,
+			/* type: Struct */ 0xe, 0, 0, 0,
+			/* size: 4 bytes */ 4, 0, 0, 0,
+			/* type: Int */ 4, 0, 0, 0,
+			/* value: 0xbad */ 0xad, 0xb, 0, 0,
+			/* padding */ 0, 0, 0, 0,
+		}, pipewire.RegistryGlobalRemove{
+			ID: 0xbad,
+		}, nil},
+	}.run(t)
+}
+
 func TestRegistryBind(t *testing.T) {
 	t.Parallel()
 
@@ -757,3 +869,20 @@ func TestRegistryBind(t *testing.T) {
 		}, nil},
 	}.run(t)
 }
+
+func TestRegistryDestroy(t *testing.T) {
+	t.Parallel()
+
+	encodingTestCases[pipewire.RegistryDestroy, *pipewire.RegistryDestroy]{
+		{"sample", []byte{
+			/* size: rest of data*/ 0x10, 0, 0, 0,
+			/* type: Struct */ 0xe, 0, 0, 0,
+			/* size: 4 bytes */ 4, 0, 0, 0,
+			/* type: Int */ 4, 0, 0, 0,
+			/* value: 0xbad */ 0xad, 0xb, 0, 0,
+			/* padding */ 0, 0, 0, 0,
+		}, pipewire.RegistryDestroy{
+			ID: 0xbad,
+		}, nil},
+	}.run(t)
+}

internal/pipewire/pipewire.go

@@ -16,6 +16,7 @@ package pipewire
 
 import (
 	"encoding/binary"
+	"errors"
 	"fmt"
 	"io"
 	"net"
@@ -51,20 +52,27 @@ type Context struct {
 	buf []byte
 	// Current [Header.Sequence] value, incremented every write.
 	sequence Int
-	// Current server-side [Header.Sequence] value, incremented on every event processed.
-	remoteSequence Int
+	// Pending file descriptors to be sent with the next message.
+	pendingFiles []int
+	// File count already kept track of in [Header].
+	headerFiles int
+
 	// Proxy id associations.
 	proxy map[Int]eventProxy
 	// Newly allocated proxies pending acknowledgement from the server.
 	pendingIds map[Int]struct{}
 	// Smallest available Id for the next proxy.
 	nextId Int
-	// Server side registry generation number.
-	generation Long
-	// Pending file descriptors to be sent with the next message.
-	pendingFiles []int
-	// File count already kept track of in [Header].
-	headerFiles int
+	// Proxies targeted by the [CoreDestroy] event pending until next [CoreSync].
+	pendingDestruction map[Int]struct{}
+
+	// Proxy for built-in core events.
+	core Core
+	// Proxy for built-in client events.
+	client Client
+
+	// Current server-side [Header.Sequence] value, incremented on every event processed.
+	remoteSequence Int
 	// Files from the server. This is discarded on every Roundtrip so eventProxy
 	// implementations must make sure to close them to avoid leaking fds.
 	//
@@ -80,13 +88,11 @@ type Context struct {
 	// Pending footer value deferred to the next round trip,
 	// sent if pendingFooter is nil. This is for emulating upstream behaviour
 	deferredPendingFooter KnownSize
+	// Server side registry generation number.
+	generation Long
 	// Deferred operations ran after a [Core.Sync] completes or Close is called. Errors
 	//are reported as part of [ProxyConsumeError] and is not considered fatal unless panicked.
 	syncComplete []func() error
-	// Proxy for built-in core events.
-	core Core
-	// Proxy for built-in client events.
-	client Client
 
 	// Passed to [Conn.Recvmsg]. Not copied if sufficient for all received messages.
 	iovecBuf [1 << 15]byte
@@ -120,8 +126,9 @@ func New(conn Conn, props SPADict) (*Context, error) {
 		PW_ID_CLIENT: {},
 	}
 	ctx.nextId = Int(len(ctx.proxy))
+	ctx.pendingDestruction = make(map[Int]struct{})
 
-	if err := ctx.coreHello(); err != nil {
+	if err := ctx.core.hello(); err != nil {
 		return nil, err
 	}
 	if err := ctx.clientUpdateProperties(props); err != nil {
@@ -419,6 +426,9 @@ type eventProxy interface {
 	consume(opcode byte, files []int, unmarshal func(v any)) error
 	// setBoundProps stores a [CoreBoundProps] event received from the server.
 	setBoundProps(event *CoreBoundProps) error
+	// remove is called when the proxy is removed for any reason, usually from
+	// being targeted by a [PW_CORE_EVENT_REMOVE_ID] event.
+	remove() error
 
 	// Stringer returns the PipeWire interface name.
 	fmt.Stringer
@@ -499,13 +509,21 @@ func (e DanglingFilesError) Error() string {
 }
 
 // An UnacknowledgedProxyError holds newly allocated proxy ids that the server failed
-// to acknowledge after an otherwise successful [Context.Roundtrip].
+// to acknowledge after an otherwise successful [Core.Sync].
 type UnacknowledgedProxyError []Int
 
 func (e UnacknowledgedProxyError) Error() string {
 	return "server did not acknowledge " + strconv.Itoa(len(e)) + " proxies"
 }
 
+// An UnacknowledgedProxyDestructionError holds destroyed proxy ids that the server failed
+// to acknowledge after an otherwise successful [Core.Sync].
+type UnacknowledgedProxyDestructionError []Int
+
+func (e UnacknowledgedProxyDestructionError) Error() string {
+	return "server did not acknowledge " + strconv.Itoa(len(e)) + " proxy destructions"
+}
+
 // A ProxyFatalError describes an error that terminates event handling during a
 // [Context.Roundtrip] and makes further event processing no longer possible.
 type ProxyFatalError struct {
@@ -636,7 +654,7 @@ func (ctx *Context) roundtrip() (err error) {
 }
 
 // currentSeq returns the current sequence number.
-// This must only be called from eventProxy.consume.
+// This must only be called immediately after queueing a message.
 func (ctx *Context) currentSeq() Int { return ctx.sequence - 1 }
 
 // currentRemoteSeq returns the current remote sequence number.
@@ -786,6 +804,52 @@ func (ctx *Context) Close() (err error) {
 	}
 }
 
+// expectsCoreError returns a function that inspects an error value and
+// returns the address of a [CoreError] if it is the only error present
+// and targets the specified proxy and sequence.
+//
+// The behaviour of expectsCoreError is only correct for an empty buf
+// prior to calling. If buf is not empty, [Core.Sync] is called, with
+// its return value stored to the value pointed to by errP if not nil,
+// and the function is not populated.
+//
+// The caller must queue a message and call [Core.Sync] immediately
+// after calling expectsCoreError.
+func (ctx *Context) expectsCoreError(id Int, errP *error) (asCoreError func() (coreError *CoreError)) {
+	if len(ctx.buf) > 0 {
+		if err := ctx.GetCore().Sync(); err != nil {
+			*errP = err
+			return nil
+		}
+	}
+
+	sequence := ctx.sequence
+	return func() (coreError *CoreError) {
+		if proxyErrors, ok := (*errP).(ProxyConsumeError); !ok ||
+			len(proxyErrors) != 1 ||
+			!errors.As(proxyErrors[0], &coreError) ||
+			coreError == nil ||
+			coreError.ID != id ||
+			coreError.Sequence != sequence {
+			// do not return a non-matching CoreError
+			coreError = nil
+		}
+		return
+	}
+}
+
+// A PermissionError describes an error emitted by the server when trying to
+// perform an operation that the client has no permission for.
+type PermissionError struct {
+	// The id of the resource (proxy if emitted by the client) that is in error.
+	ID Int `json:"id"`
+	// An error message.
+	Message string `json:"message"`
+}
+
+func (*PermissionError) Unwrap() error   { return syscall.EPERM }
+func (e *PermissionError) Error() string { return e.Message }
+
 // Remote is the environment (sic) with the remote name.
 const Remote = "PIPEWIRE_REMOTE"
 

internal/pipewire/pipewire_test.go

@@ -680,9 +680,6 @@ func TestContext(t *testing.T) {
 	}); err != nil {
 		t.Fatalf("SecurityContext.Create: error = %v", err)
 	}
-	if err := ctx.GetCore().Sync(); err != nil {
-		t.Fatalf("Sync: error = %v", err)
-	}
 
 	// none of these should change
 	if coreInfo := ctx.GetCore().Info; !reflect.DeepEqual(coreInfo, &wantCoreInfo0) {
@@ -836,6 +833,7 @@ func TestContextErrors(t *testing.T) {
 
 		{"UnexpectedFileCountError", &pipewire.UnexpectedFileCountError{0, -1}, "received -1 files instead of the expected 0"},
 		{"UnacknowledgedProxyError", make(pipewire.UnacknowledgedProxyError, 1<<4), "server did not acknowledge 16 proxies"},
+		{"UnacknowledgedProxyDestructionError", make(pipewire.UnacknowledgedProxyDestructionError, 1<<4), "server did not acknowledge 16 proxy destructions"},
 		{"DanglingFilesError", make(pipewire.DanglingFilesError, 1<<4), "received 16 dangling files"},
 		{"UnexpectedFilesError", pipewire.UnexpectedFilesError(1 << 4), "server message headers claim to have sent more files than actually received"},
 		{"UnexpectedSequenceError", pipewire.UnexpectedSequenceError(1 << 4), "unexpected seq 16"},
@@ -862,6 +860,19 @@ func TestContextErrors(t *testing.T) {
 			ID:       0xbad,
 			Sequence: 0xcafe,
 		}, "received Core::Ping seq 51966 targeting unknown proxy id 2989"},
+
+		{"GlobalIDCollisionError", &pipewire.GlobalIDCollisionError{
+			ID:       0xbad,
+			Previous: &pipewire.RegistryGlobal{Type: "PipeWire:Interface:Invalid"},
+			Current:  &pipewire.RegistryGlobal{Type: "PipeWire:Interface:NewInvalid"},
+		}, "new Registry::Global event for PipeWire:Interface:NewInvalid stepping on previous id 2989 for PipeWire:Interface:Invalid"},
+
+		{"UnknownGlobalIDRemoveError", pipewire.UnknownGlobalIDRemoveError(0xbad), "Registry::GlobalRemove event targets unknown id 2989"},
+
+		{"PermissionError", &pipewire.PermissionError{
+			ID:      2,
+			Message: "no permission to destroy 0",
+		}, "no permission to destroy 0"},
 	}
 	for _, tc := range testCases {
 		t.Run(tc.name, func(t *testing.T) {

internal/pipewire/pod.go

@@ -384,19 +384,16 @@ func unmarshalValue(data []byte, v reflect.Value, wireSizeP *Word) error {
 		return nil
 
 	case reflect.Pointer:
-		if len(data) < SizePrefix {
-			return ErrEOFPrefix
-		}
-		switch SPAKind(binary.NativeEndian.Uint32(data[SizeSPrefix:])) {
-		case SPA_TYPE_None:
+		if ok, err := unmarshalHandleNone(&data, wireSizeP); err != nil {
+			return err
+		} else if ok {
 			v.SetZero()
 			return nil
-
-		default:
-			v.Set(reflect.New(v.Type().Elem()))
-			return unmarshalValue(data, v.Elem(), wireSizeP)
 		}
 
+		v.Set(reflect.New(v.Type().Elem()))
+		return unmarshalValue(data, v.Elem(), wireSizeP)
+
 	case reflect.String:
 		*wireSizeP = 0
 		if err := unmarshalCheckTypeBounds(&data, SPA_TYPE_String, wireSizeP); err != nil {
@@ -422,6 +419,29 @@ func unmarshalValue(data []byte, v reflect.Value, wireSizeP *Word) error {
 	}
 }
 
+// unmarshalHandleNone establishes prefix bounds and, for a value of type [SPA_TYPE_None],
+// validates its size and skips the header. This is for unmarshalling values that can be nil.
+func unmarshalHandleNone(data *[]byte, wireSizeP *Word) (bool, error) {
+	if len(*data) < SizePrefix {
+		return false, ErrEOFPrefix
+	}
+
+	if SPAKind(binary.NativeEndian.Uint32((*data)[SizeSPrefix:])) != SPA_TYPE_None {
+		return false, nil
+	}
+
+	*wireSizeP = 0
+	if err := unmarshalCheckTypeBounds(data, SPA_TYPE_None, wireSizeP); err != nil {
+		return true, err
+	}
+
+	if len(*data) != 0 {
+		return true, TrailingGarbageError(*data)
+	}
+
+	return true, nil
+}
+
 // An InconsistentSizeError describes an inconsistent size prefix encountered
 // in data passed to [Unmarshal].
 type InconsistentSizeError struct{ Prefix, Expect Word }

internal/pipewire/securitycontext.go

@@ -26,9 +26,10 @@ const (
 
 const (
 	PW_SECURITY_CONTEXT_METHOD_ADD_LISTENER = iota
-	PW_SECURITY_CONTEXT_METHOD_CREATE
-	PW_SECURITY_CONTEXT_METHOD_NUM
 
+	PW_SECURITY_CONTEXT_METHOD_CREATE
+
+	PW_SECURITY_CONTEXT_METHOD_NUM
 	PW_VERSION_SECURITY_CONTEXT_METHODS = 0
 )
 
@@ -90,6 +91,8 @@ type SecurityContext struct {
 	GlobalID Int `json:"id"`
 
 	ctx *Context
+
+	destructible
 }
 
 // GetSecurityContext queues a [RegistryBind] message for the PipeWire server
@@ -108,13 +111,39 @@ func (registry *Registry) GetSecurityContext() (securityContext *SecurityContext
 }
 
 // Create queues a [SecurityContextCreate] message for the PipeWire server.
-func (securityContext *SecurityContext) Create(listenFd, closeFd int, props SPADict) error {
+func (securityContext *SecurityContext) Create(listenFd, closeFd int, props SPADict) (err error) {
+	if err = securityContext.checkDestroy(); err != nil {
+		return
+	}
+
+	asCoreError := securityContext.ctx.expectsCoreError(securityContext.ID, &err)
+	if err != nil {
+		return
+	}
+
 	// queued in reverse based on upstream behaviour, unsure why
 	offset := securityContext.ctx.queueFiles(closeFd, listenFd)
-	return securityContext.ctx.writeMessage(
+	if err = securityContext.ctx.writeMessage(
 		securityContext.ID,
 		&SecurityContextCreate{ListenFd: offset + 1, CloseFd: offset + 0, Properties: &props},
-	)
+	); err != nil {
+		return
+	}
+	if err = securityContext.ctx.GetCore().Sync(); err == nil {
+		return nil
+	}
+
+	if coreError := asCoreError(); coreError == nil {
+		return
+	} else {
+		switch syscall.Errno(-coreError.Result) {
+		case syscall.EPERM:
+			return &PermissionError{securityContext.ID, coreError.Message}
+
+		default:
+			return coreError
+		}
+	}
 }
 
 // securityContextCloser holds onto resources associated to the security context.
@@ -144,6 +173,9 @@ func (scc *securityContextCloser) Close() (err error) {
 // BindAndCreate binds a new socket to the specified pathname and pass it to Create.
 // It returns an [io.Closer] corresponding to [SecurityContextCreate.CloseFd].
 func (securityContext *SecurityContext) BindAndCreate(pathname string, props SPADict) (io.Closer, error) {
+	if err := securityContext.checkDestroy(); err != nil {
+		return nil, err
+	}
 	var scc securityContextCloser
 
 	// ensure pathname is available
@@ -185,17 +217,19 @@ func (securityContext *SecurityContext) BindAndCreate(pathname string, props SPA
 }
 
 func (securityContext *SecurityContext) consume(opcode byte, files []int, _ func(v any)) error {
+	securityContext.mustCheckDestroy()
 	closeReceivedFiles(files...)
 	switch opcode {
 	// SecurityContext does not receive any events
 
 	default:
-		return &UnsupportedOpcodeError{opcode, securityContext.String()}
+		panic(&UnsupportedOpcodeError{opcode, securityContext.String()})
 	}
 
 }
 
 func (securityContext *SecurityContext) setBoundProps(event *CoreBoundProps) error {
+	securityContext.mustCheckDestroy()
 	if securityContext.ID != event.ID {
 		return &InconsistentIdError{Proxy: securityContext, ID: securityContext.ID, ServerID: event.ID}
 	}
@@ -205,4 +239,9 @@ func (securityContext *SecurityContext) setBoundProps(event *CoreBoundProps) err
 	return nil
 }
 
+// Destroy destroys this [SecurityContext] proxy.
+func (securityContext *SecurityContext) Destroy() error {
+	return securityContext.destroy(securityContext.ctx, securityContext.ID)
+}
+
 func (securityContext *SecurityContext) String() string { return PW_TYPE_INTERFACE_SecurityContext }

internal/system/pipewire.go

@@ -14,8 +14,8 @@ import (
 // PipeWire maintains a pipewire socket with SecurityContext attached via [pipewire].
 // The socket stops accepting connections once the pipe referred to by sync is closed.
 // The socket is pathname only and is destroyed on revert.
-func (sys *I) PipeWire(dst *check.Absolute) *I {
-	sys.ops = append(sys.ops, &pipewireOp{nil, dst})
+func (sys *I) PipeWire(dst *check.Absolute, appID, instanceID string) *I {
+	sys.ops = append(sys.ops, &pipewireOp{nil, dst, appID, instanceID})
 	return sys
 }
 
@@ -23,6 +23,8 @@ func (sys *I) PipeWire(dst *check.Absolute) *I {
 type pipewireOp struct {
 	scc io.Closer
 	dst *check.Absolute
+
+	appID, instanceID string
 }
 
 func (p *pipewireOp) Type() hst.Enablement { return Process }
@@ -56,12 +58,11 @@ func (p *pipewireOp) apply(sys *I) (err error) {
 
 	if p.scc, err = securityContext.BindAndCreate(p.dst.String(), pipewire.SPADict{
 		{Key: pipewire.PW_KEY_SEC_ENGINE, Value: "app.hakurei"},
+		{Key: pipewire.PW_KEY_SEC_APP_ID, Value: p.appID},
+		{Key: pipewire.PW_KEY_SEC_INSTANCE_ID, Value: p.instanceID},
 		{Key: pipewire.PW_KEY_ACCESS, Value: "restricted"},
 	}); err != nil {
 		return newOpError("pipewire", err, false)
-	} else if err = ctx.GetCore().Sync(); err != nil {
-		_ = p.scc.Close()
-		return newOpError("pipewire", err, false)
 	}
 
 	if err = sys.chmod(p.dst.String(), 0); err != nil {
@@ -92,7 +93,9 @@ func (p *pipewireOp) revert(sys *I, _ *Criteria) error {
 func (p *pipewireOp) Is(o Op) bool {
 	target, ok := o.(*pipewireOp)
 	return ok && p != nil && target != nil &&
-		p.dst.Is(target.dst)
+		p.dst.Is(target.dst) &&
+		p.appID == target.appID &&
+		p.instanceID == target.instanceID
 }
 
 func (p *pipewireOp) Path() string   { return p.dst.String() }

internal/system/pipewire_test.go

@@ -18,6 +18,8 @@ func TestPipeWireOp(t *testing.T) {
 	checkOpBehaviour(t, checkNoParallel, []opBehaviourTestCase{
 		{"success", 0xbeef, 0xff, &pipewireOp{nil,
 			m(path.Join(t.TempDir(), "pipewire")),
+			"org.chromium.Chromium",
+			"ebf083d1b175911782d413369b64ce7c",
 		}, []stub.Call{
 			call("pipewireConnect", stub.ExpectArgs{}, func() *pipewire.Context {
 				if ctx, err := pipewire.New(&stubPipeWireConn{sendmsg: []string{
@@ -154,11 +156,11 @@ func TestPipeWireOp(t *testing.T) {
 					string([]byte{
 						// header: SecurityContext::Create
 						3, 0, 0, 0,
-						0xa8, 0, 0, 1,
+						0x40, 1, 0, 1,
 						5, 0, 0, 0,
 						2, 0, 0, 0,
 						// Struct
-						0xa0, 0, 0, 0,
+						0x38, 1, 0, 0,
 						0xe, 0, 0, 0,
 						// Fd: listen_fd = 1
 						8, 0, 0, 0,
@@ -171,12 +173,12 @@ func TestPipeWireOp(t *testing.T) {
 						0, 0, 0, 0,
 						0, 0, 0, 0,
 						// Struct: spa_dict
-						0x78, 0, 0, 0,
+						0x10, 1, 0, 0,
 						0xe, 0, 0, 0,
-						// Int: n_items = 2
+						// Int: n_items = 4
+						4, 0, 0, 0,
 						4, 0, 0, 0,
 						4, 0, 0, 0,
-						2, 0, 0, 0,
 						0, 0, 0, 0,
 						// String: key = "pipewire.sec.engine"
 						0x14, 0, 0, 0,
@@ -194,6 +196,48 @@ func TestPipeWireOp(t *testing.T) {
 						0x68, 0x61, 0x6b, 0x75,
 						0x72, 0x65, 0x69, 0,
 						0, 0, 0, 0,
+						// String: key = "pipewire.sec.app-id"
+						0x14, 0, 0, 0,
+						8, 0, 0, 0,
+						0x70, 0x69, 0x70, 0x65,
+						0x77, 0x69, 0x72, 0x65,
+						0x2e, 0x73, 0x65, 0x63,
+						0x2e, 0x61, 0x70, 0x70,
+						0x2d, 0x69, 0x64, 0,
+						0, 0, 0, 0,
+						// String: value = "org.chromium.Chromium"
+						0x16, 0, 0, 0,
+						8, 0, 0, 0,
+						0x6f, 0x72, 0x67, 0x2e,
+						0x63, 0x68, 0x72, 0x6f,
+						0x6d, 0x69, 0x75, 0x6d,
+						0x2e, 0x43, 0x68, 0x72,
+						0x6f, 0x6d, 0x69, 0x75,
+						// String: key = "pipewire.sec.instance-id"
+						0x6d, 0, 0, 0,
+						0x19, 0, 0, 0,
+						8, 0, 0, 0,
+						0x70, 0x69, 0x70, 0x65,
+						0x77, 0x69, 0x72, 0x65,
+						0x2e, 0x73, 0x65, 0x63,
+						0x2e, 0x69, 0x6e, 0x73,
+						0x74, 0x61, 0x6e, 0x63,
+						0x65, 0x2d, 0x69, 0x64,
+						0, 0, 0, 0,
+						0, 0, 0, 0,
+						// String: value = "ebf083d1b175911782d413369b64ce7c"
+						0x21, 0, 0, 0,
+						8, 0, 0, 0,
+						0x65, 0x62, 0x66, 0x30,
+						0x38, 0x33, 0x64, 0x31,
+						0x62, 0x31, 0x37, 0x35,
+						0x39, 0x31, 0x31, 0x37,
+						0x38, 0x32, 0x64, 0x34,
+						0x31, 0x33, 0x33, 0x36,
+						0x39, 0x62, 0x36, 0x34,
+						0x63, 0x65, 0x37, 0x63,
+						0, 0, 0, 0,
+						0, 0, 0, 0,
 						// String: key = "pipewire.access"
 						0x10, 0, 0, 0,
 						8, 0, 0, 0,
@@ -386,29 +430,43 @@ func TestPipeWireOp(t *testing.T) {
 
 	checkOpsBuilder(t, "PipeWire", []opsBuilderTestCase{
 		{"sample", 0xcafe, func(_ *testing.T, sys *I) {
-			sys.PipeWire(m("/tmp/hakurei.1971/ebf083d1b175911782d413369b64ce7c/pipewire"))
+			sys.PipeWire(m("/tmp/hakurei.1971/ebf083d1b175911782d413369b64ce7c/pipewire"),
+				"org.chromium.Chromium",
+				"ebf083d1b175911782d413369b64ce7c")
 		}, []Op{&pipewireOp{nil,
 			m("/tmp/hakurei.1971/ebf083d1b175911782d413369b64ce7c/pipewire"),
+			"org.chromium.Chromium",
+			"ebf083d1b175911782d413369b64ce7c",
 		}}, stub.Expect{}},
 	})
 
 	checkOpIs(t, []opIsTestCase{
 		{"dst differs", &pipewireOp{nil,
 			m("/tmp/hakurei.1971/ebf083d1b175911782d413369b64ce7d/pipewire"),
+			"org.chromium.Chromium",
+			"ebf083d1b175911782d413369b64ce7c",
 		}, &pipewireOp{nil,
 			m("/tmp/hakurei.1971/ebf083d1b175911782d413369b64ce7c/pipewire"),
+			"org.chromium.Chromium",
+			"ebf083d1b175911782d413369b64ce7c",
 		}, false},
 
 		{"equals", &pipewireOp{nil,
 			m("/tmp/hakurei.1971/ebf083d1b175911782d413369b64ce7c/pipewire"),
+			"org.chromium.Chromium",
+			"ebf083d1b175911782d413369b64ce7c",
 		}, &pipewireOp{nil,
 			m("/tmp/hakurei.1971/ebf083d1b175911782d413369b64ce7c/pipewire"),
+			"org.chromium.Chromium",
+			"ebf083d1b175911782d413369b64ce7c",
 		}, true},
 	})
 
 	checkOpMeta(t, []opMetaTestCase{
 		{"sample", &pipewireOp{nil,
 			m("/tmp/hakurei.1971/ebf083d1b175911782d413369b64ce7c/pipewire"),
+			"org.chromium.Chromium",
+			"ebf083d1b175911782d413369b64ce7c",
 		}, Process, "/tmp/hakurei.1971/ebf083d1b175911782d413369b64ce7c/pipewire",
 			`pipewire socket at "/tmp/hakurei.1971/ebf083d1b175911782d413369b64ce7c/pipewire"`},
 	})

nixos.nix

@@ -68,7 +68,7 @@ in
 
     home-manager =
       let
-        privPackages = mapAttrs (username: userid: {
+        privPackages = mapAttrs (_: userid: {
           home.packages = foldlAttrs (
             acc: id: app:
             [
@@ -196,15 +196,6 @@ in
                             }
                           ]
                         )
-                        ++ optional (app.enablements.pipewire && app.pulse) {
-                          type = "daemon";
-                          dst = if app.mapRealUid then "/run/user/${toString config.users.users.${username}.uid}/pulse/native" else "/run/user/65534/pulse/native";
-                          path = cfg.shell;
-                          args = [
-                            "-lc"
-                            "exec pipewire-pulse"
-                          ];
-                        }
                         ++ [
                           {
                             type = "bind";

options.md

@@ -35,7 +35,7 @@ package
 
 
 *Default:*
-` <derivation hakurei-static-x86_64-unknown-linux-musl-0.3.1> `
+` <derivation hakurei-static-x86_64-unknown-linux-musl-0.3.3> `
 
 
 
@@ -73,11 +73,11 @@ null or boolean
 
 
 
-## environment\.hakurei\.apps\.\<name>\.enablements\.pulse
+## environment\.hakurei\.apps\.\<name>\.enablements\.pipewire
 
 
 
-Whether to share the PulseAudio socket and cookie\.
+Whether to share the PipeWire server via pipewire-pulse on a SecurityContext socket\.
 
 
 
@@ -95,7 +95,7 @@ null or boolean
 
 
 
-Whether to share the Wayland socket\.
+Whether to share the Wayland server via security-context-v1\.
 
 
 
@@ -805,7 +805,7 @@ package
 
 
 *Default:*
-` <derivation hakurei-hsu-0.3.1> `
+` <derivation hakurei-hsu-0.3.3> `
 
 
 

options.nix

@@ -12,13 +12,13 @@ in
 
       package = mkOption {
         type = types.package;
-        default = packages.${pkgs.system}.hakurei;
+        default = packages.${pkgs.stdenv.hostPlatform.system}.hakurei;
         description = "The hakurei package to use.";
       };
 
       hsuPackage = mkOption {
         type = types.package;
-        default = packages.${pkgs.system}.hsu;
+        default = packages.${pkgs.stdenv.hostPlatform.system}.hsu;
         description = "The hsu package to use.";
       };
 
@@ -242,19 +242,11 @@ in
                   type = nullOr bool;
                   default = true;
                   description = ''
-                    Whether to share the PipeWire server via SecurityContext.
+                    Whether to share the PipeWire server via pipewire-pulse on a SecurityContext socket.
                   '';
                 };
               };
 
-              pulse = mkOption {
-                type = nullOr bool;
-                default = true;
-                description = ''
-                  Whether to run the PulseAudio compatibility daemon.
-                '';
-              };
-
               share = mkOption {
                 type = nullOr package;
                 default = null;

package.nix

@@ -32,7 +32,7 @@
 
 buildGoModule rec {
   pname = "hakurei";
-  version = "0.3.2";
+  version = "0.3.3";
 
   srcFiltered = builtins.path {
     name = "${pname}-src";

test/configuration.nix

@@ -84,7 +84,7 @@
 
   virtualisation = {
     # Hopefully reduces spurious test failures:
-    memorySize = if pkgs.hostPlatform.is32bit then 2046 else 8192;
+    memorySize = if pkgs.stdenv.hostPlatform.is32bit then 2046 else 8192;
 
     qemu.options = [
       # Need to switch to a different GPU driver than the default one (-vga std) so that Sway can launch:

test/default.nix

@@ -1,6 +1,6 @@
 {
   lib,
-  nixosTest,
+  testers,
   buildFHSEnv,
   writeShellScriptBin,
 
@@ -9,7 +9,7 @@
   withRace ? false,
 }:
 
-nixosTest {
+testers.nixosTest {
   name = "hakurei" + (if withRace then "-race" else "");
   nodes.machine =
     { options, pkgs, ... }:

test/sandbox/case/device.nix

@@ -41,7 +41,6 @@ in
       "DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/65534/bus"
       "DISPLAY=unix:/tmp/.X11-unix/X0"
       "HOME=/var/lib/hakurei/u0/a4"
-      "PIPEWIRE_REMOTE=/run/user/65534/pipewire-0"
       "SHELL=/run/current-system/sw/bin/bash"
       "TERM=linux"
       "USER=u0_a4"
@@ -49,6 +48,7 @@ in
       "XDG_RUNTIME_DIR=/run/user/65534"
       "XDG_SESSION_CLASS=user"
       "XDG_SESSION_TYPE=wayland"
+      "PULSE_SERVER=unix:/run/user/65534/pulse/native"
     ];
 
     fs = fs "dead" {
@@ -75,6 +75,7 @@ in
         "fstab" = fs "80001ff" null null;
         "hsurc" = fs "80001ff" null null;
         "fuse.conf" = fs "80001ff" null null;
+        "gai.conf" = fs "80001ff" null null;
         "group" = fs "180" null "hakurei:x:65534:\n";
         "host.conf" = fs "80001ff" null null;
         "hostname" = fs "80001ff" null null;
@@ -137,12 +138,8 @@ in
         user = fs "800001ed" {
           "65534" = fs "800001c0" {
             bus = fs "10001fd" null null;
-            pulse = fs "800001c0" {
-              native = fs "10001ff" null null;
-              pid = fs "1a4" null null;
-            } null;
+            pulse = fs "800001c0" { native = fs "10001ff" null null; } null;
             wayland-0 = fs "1000038" null null;
-            pipewire-0 = fs "1000038" null null;
           } null;
         } null;
       } null;
@@ -193,8 +190,6 @@ in
                     home-manager = fs "800001ed" { gcroots = fs "800001ed" { current-home = fs "80001ff" null null; } null; } null;
                     nix = fs "800001ed" {
                       profiles = fs "800001ed" {
-                        home-manager = fs "80001ff" null null;
-                        home-manager-1-link = fs "80001ff" null null;
                         profile = fs "80001ff" null null;
                         profile-1-link = fs "80001ff" null null;
                       } null;
@@ -225,15 +220,14 @@ in
       (ent "/" ignore ignore ignore ignore ignore)
       (ent "/" "/dev/shm" "rw,nosuid,nodev,relatime" "tmpfs" "ephemeral" "rw,uid=10004,gid=10004")
       (ent "/" "/run/user" "rw,nosuid,nodev,relatime" "tmpfs" "ephemeral" "rw,size=16384k,mode=755,uid=10004,gid=10004")
-      (ent "/tmp/hakurei.0/tmpdir/4" "/tmp" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
+      (ent "/tmp/hakurei.0/tmpdir/4" "/tmp" "rw,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
       (ent ignore "/etc/passwd" "ro,nosuid,nodev,relatime" "tmpfs" "rootfs" "rw,uid=10004,gid=10004")
       (ent ignore "/etc/group" "ro,nosuid,nodev,relatime" "tmpfs" "rootfs" "rw,uid=10004,gid=10004")
-      (ent ignore "/run/user/65534/wayland-0" "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent "/tmp/.X11-unix" "/tmp/.X11-unix" "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent ignore "/run/user/65534/pipewire-0" "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent ignore "/run/user/65534/bus" "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent "/bin" "/bin" "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent "/usr/bin" "/usr/bin" "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
+      (ent ignore "/run/user/65534/wayland-0" "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent "/tmp/.X11-unix" "/tmp/.X11-unix" "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent ignore "/run/user/65534/bus" "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent "/bin" "/bin" "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent "/usr/bin" "/usr/bin" "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
       (ent "/" "/nix/store" "ro,nosuid,nodev,relatime" "overlay" "overlay" "rw,lowerdir=/mnt-root/nix/.ro-store,upperdir=/mnt-root/nix/.rw-store/upper,workdir=/mnt-root/nix/.rw-store/work,uuid=on")
       (ent "/block" "/sys/block" "ro,nosuid,nodev,noexec,relatime" "sysfs" "sysfs" "rw")
       (ent "/bus" "/sys/bus" "ro,nosuid,nodev,noexec,relatime" "sysfs" "sysfs" "rw")
@@ -241,12 +235,13 @@ in
       (ent "/dev" "/sys/dev" "ro,nosuid,nodev,noexec,relatime" "sysfs" "sysfs" "rw")
       (ent "/devices" "/sys/devices" "ro,nosuid,nodev,noexec,relatime" "sysfs" "sysfs" "rw")
       (ent "/dri" "/dev/dri" "rw,nosuid" "devtmpfs" "devtmpfs" ignore)
-      (ent "/var/tmp" "/var/tmp" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent "/var/cache" "/var/cache" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
+      (ent "/var/tmp" "/var/tmp" "rw,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent "/var/cache" "/var/cache" "rw,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
       (ent "/" "/.hakurei/.ro-store" "rw,relatime" "overlay" "overlay" "ro,lowerdir=/host/nix/.ro-store:/host/nix/.rw-store/upper,redirect_dir=nofollow,userxattr")
       (ent "/" "/.hakurei/store" "rw,relatime" "overlay" "overlay" "rw,lowerdir=/host/nix/.ro-store:/host/nix/.rw-store/upper,upperdir=/host/tmp/.hakurei-store-rw/upper,workdir=/host/tmp/.hakurei-store-rw/work,redirect_dir=nofollow,userxattr")
-      (ent "/etc" ignore "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent "/var/lib/hakurei/u0/a4" "/var/lib/hakurei/u0/a4" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
+      (ent "/etc" ignore "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent "/var/lib/hakurei/u0/a4" "/var/lib/hakurei/u0/a4" "rw,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent ignore "/run/user/65534/pulse/native" "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
     ];
 
     seccomp = true;

test/sandbox/case/mapuid.nix

@@ -49,7 +49,6 @@ in
     env = [
       "DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus"
       "HOME=/var/lib/hakurei/u0/a3"
-      "PIPEWIRE_REMOTE=/run/user/1000/pipewire-0"
       "SHELL=/run/current-system/sw/bin/bash"
       "TERM=linux"
       "USER=u0_a3"
@@ -57,6 +56,7 @@ in
       "XDG_RUNTIME_DIR=/run/user/1000"
       "XDG_SESSION_CLASS=user"
       "XDG_SESSION_TYPE=wayland"
+      "PULSE_SERVER=unix:/run/user/1000/pulse/native"
     ];
 
     fs = fs "dead" {
@@ -100,6 +100,7 @@ in
         "fstab" = fs "80001ff" null null;
         "hsurc" = fs "80001ff" null null;
         "fuse.conf" = fs "80001ff" null null;
+        "gai.conf" = fs "80001ff" null null;
         "group" = fs "180" null "hakurei:x:100:\n";
         "host.conf" = fs "80001ff" null null;
         "hostname" = fs "80001ff" null null;
@@ -162,12 +163,8 @@ in
         user = fs "800001ed" {
           "1000" = fs "800001f8" {
             bus = fs "10001fd" null null;
-            pulse = fs "800001c0" {
-              native = fs "10001ff" null null;
-              pid = fs "1a4" null null;
-            } null;
+            pulse = fs "800001c0" { native = fs "10001ff" null null; } null;
             wayland-0 = fs "1000038" null null;
-            pipewire-0 = fs "1000038" null null;
           } null;
         } null;
       } null;
@@ -216,8 +213,6 @@ in
                     home-manager = fs "800001ed" { gcroots = fs "800001ed" { current-home = fs "80001ff" null null; } null; } null;
                     nix = fs "800001ed" {
                       profiles = fs "800001ed" {
-                        home-manager = fs "80001ff" null null;
-                        home-manager-1-link = fs "80001ff" null null;
                         profile = fs "80001ff" null null;
                         profile-1-link = fs "80001ff" null null;
                       } null;
@@ -252,15 +247,14 @@ in
       (ent "/" "/dev/mqueue" "rw,nosuid,nodev,noexec,relatime" "mqueue" "mqueue" "rw")
       (ent "/" "/dev/shm" "rw,nosuid,nodev,relatime" "tmpfs" "ephemeral" "rw,uid=10003,gid=10003")
       (ent "/" "/run/user" "rw,nosuid,nodev,relatime" "tmpfs" "ephemeral" "rw,size=16384k,mode=755,uid=10003,gid=10003")
-      (ent "/tmp/hakurei.0/runtime/3" "/run/user/1000" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent "/tmp/hakurei.0/tmpdir/3" "/tmp" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
+      (ent "/tmp/hakurei.0/runtime/3" "/run/user/1000" "rw,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent "/tmp/hakurei.0/tmpdir/3" "/tmp" "rw,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
       (ent ignore "/etc/passwd" "ro,nosuid,nodev,relatime" "tmpfs" "rootfs" "rw,uid=10003,gid=10003")
       (ent ignore "/etc/group" "ro,nosuid,nodev,relatime" "tmpfs" "rootfs" "rw,uid=10003,gid=10003")
-      (ent ignore "/run/user/1000/wayland-0" "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent ignore "/run/user/1000/pipewire-0" "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent ignore "/run/user/1000/bus" "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent "/bin" "/bin" "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent "/usr/bin" "/usr/bin" "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
+      (ent ignore "/run/user/1000/wayland-0" "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent ignore "/run/user/1000/bus" "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent "/bin" "/bin" "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent "/usr/bin" "/usr/bin" "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
       (ent "/" "/nix/store" "ro,nosuid,nodev,relatime" "overlay" "overlay" "rw,lowerdir=/mnt-root/nix/.ro-store,upperdir=/mnt-root/nix/.rw-store/upper,workdir=/mnt-root/nix/.rw-store/work,uuid=on")
       (ent "/block" "/sys/block" "ro,nosuid,nodev,noexec,relatime" "sysfs" "sysfs" "rw")
       (ent "/bus" "/sys/bus" "ro,nosuid,nodev,noexec,relatime" "sysfs" "sysfs" "rw")
@@ -268,12 +262,13 @@ in
       (ent "/dev" "/sys/dev" "ro,nosuid,nodev,noexec,relatime" "sysfs" "sysfs" "rw")
       (ent "/devices" "/sys/devices" "ro,nosuid,nodev,noexec,relatime" "sysfs" "sysfs" "rw")
       (ent "/dri" "/dev/dri" "rw,nosuid" "devtmpfs" "devtmpfs" ignore)
-      (ent "/var/tmp" "/var/tmp" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent "/var/cache" "/var/cache" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
+      (ent "/var/tmp" "/var/tmp" "rw,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent "/var/cache" "/var/cache" "rw,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
       (ent "/" "/.hakurei/.ro-store" "rw,relatime" "overlay" "overlay" "ro,lowerdir=/host/nix/.ro-store:/host/nix/.rw-store/upper,redirect_dir=nofollow,userxattr")
       (ent "/" "/.hakurei/store" "rw,relatime" "overlay" "overlay" "rw,lowerdir=/host/nix/.ro-store:/host/nix/.rw-store/upper,upperdir=/host/tmp/.hakurei-store-rw/upper,workdir=/host/tmp/.hakurei-store-rw/work,redirect_dir=nofollow,userxattr")
-      (ent "/etc" ignore "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent "/var/lib/hakurei/u0/a3" "/var/lib/hakurei/u0/a3" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
+      (ent "/etc" ignore "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent "/var/lib/hakurei/u0/a3" "/var/lib/hakurei/u0/a3" "rw,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent ignore "/run/user/1000/pulse/native" "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
     ];
 
     seccomp = true;

test/sandbox/case/pd.nix

@@ -61,6 +61,7 @@
         "fstab" = fs "80001ff" null null;
         "hsurc" = fs "80001ff" null null;
         "fuse.conf" = fs "80001ff" null null;
+        "gai.conf" = fs "80001ff" null null;
         "group" = fs "180" null "hakurei:x:65534:\n";
         "host.conf" = fs "80001ff" null null;
         "hostname" = fs "80001ff" null null;
@@ -139,23 +140,23 @@
 
     mount = [
       (ent "/sysroot" "/" "ro,nosuid,nodev,relatime" "tmpfs" "rootfs" "rw,uid=10000,gid=10000")
-      (ent "/bin" "/bin" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent "/home" "/home" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent "/lib64" "/lib64" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent "/lost+found" "/lost+found" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent "/nix" "/nix" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
+      (ent "/bin" "/bin" "rw,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent "/home" "/home" "rw,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent "/lib64" "/lib64" "rw,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent "/lost+found" "/lost+found" "rw,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent "/nix" "/nix" "rw,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
       (ent "/" "/nix/.ro-store" "rw,nosuid,nodev,relatime" "9p" "nix-store" ignore)
       (ent "/" "/nix/.rw-store" "rw,nosuid,nodev,relatime" "tmpfs" "tmpfs" "rw,mode=755")
       (ent "/" "/nix/store" "rw,relatime" "overlay" "overlay" "rw,lowerdir=/mnt-root/nix/.ro-store,upperdir=/mnt-root/nix/.rw-store/upper,workdir=/mnt-root/nix/.rw-store/work,uuid=on")
       (ent "/" "/nix/store" "ro,nosuid,nodev,relatime" "overlay" "overlay" "rw,lowerdir=/mnt-root/nix/.ro-store,upperdir=/mnt-root/nix/.rw-store/upper,workdir=/mnt-root/nix/.rw-store/work,uuid=on")
-      (ent "/root" "/root" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
+      (ent "/root" "/root" "rw,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
       (ent "/" "/run" "rw,nosuid,nodev" "tmpfs" "tmpfs" ignore)
       (ent "/" "/run/keys" "rw,nosuid,nodev,relatime" "ramfs" "ramfs" "rw,mode=750")
       (ent "/" "/run/credentials/systemd-journald.service" "ro,nosuid,nodev,noexec,relatime,nosymfollow" "tmpfs" "tmpfs" "rw,size=1024k,nr_inodes=1024,mode=700,noswap")
       (ent "/" "/run/wrappers" "rw,nosuid,nodev,relatime" "tmpfs" "tmpfs" ignore)
       (ent "/" "/run/credentials/getty@tty1.service" "ro,nosuid,nodev,noexec,relatime,nosymfollow" "tmpfs" "tmpfs" "rw,size=1024k,nr_inodes=1024,mode=700,noswap")
       (ent "/" "/run/user/1000" "rw,nosuid,nodev,relatime" "tmpfs" "tmpfs" ignore)
-      (ent "/srv" "/srv" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
+      (ent "/srv" "/srv" "rw,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
       (ent "/" "/sys" "rw,nosuid,nodev,noexec,relatime" "sysfs" "sysfs" "rw")
       (ent "/" "/sys/kernel/security" "rw,nosuid,nodev,noexec,relatime" "securityfs" "securityfs" "rw")
       (ent "/../../.." "/sys/fs/cgroup" "rw,nosuid,nodev,noexec,relatime" "cgroup2" "cgroup2" "rw,nsdelegate,memory_recursiveprot")
@@ -166,8 +167,8 @@
       (ent "/" ignore "rw,nosuid,nodev,noexec,relatime" ignore ignore "rw")
       (ent "/" ignore "rw,nosuid,nodev,noexec,relatime" ignore ignore "rw")
       (ent "/" ignore "rw,nosuid,nodev,noexec,relatime" ignore ignore "rw")
-      (ent "/usr" "/usr" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent "/var" "/var" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
+      (ent "/usr" "/usr" "rw,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent "/var" "/var" "rw,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
       (ent "/" "/proc" "rw,nosuid,nodev,noexec,relatime" "proc" "proc" "rw")
       (ent "/" "/.hakurei" "rw,nosuid,nodev,relatime" "tmpfs" "ephemeral" "rw,size=4k,mode=755,uid=10000,gid=10000")
       (ent "/" "/dev" "ro,nosuid,nodev,relatime" "tmpfs" "devtmpfs" "rw,mode=755,uid=10000,gid=10000")
@@ -182,12 +183,12 @@
       (ent "/" "/dev/mqueue" "rw,nosuid,nodev,noexec,relatime" "mqueue" "mqueue" "rw")
       (ent "/" "/dev/shm" "rw,nosuid,nodev,relatime" "tmpfs" "ephemeral" "rw,uid=10000,gid=10000")
       (ent "/" "/run/user" "rw,nosuid,nodev,relatime" "tmpfs" "ephemeral" "rw,size=16384k,mode=755,uid=10000,gid=10000")
-      (ent "/tmp/hakurei.0/runtime/0" "/run/user/65534" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent "/tmp/hakurei.0/tmpdir/0" "/tmp" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
+      (ent "/tmp/hakurei.0/runtime/0" "/run/user/65534" "rw,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent "/tmp/hakurei.0/tmpdir/0" "/tmp" "rw,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
       (ent ignore "/etc/passwd" "ro,nosuid,nodev,relatime" "tmpfs" "rootfs" "rw,uid=10000,gid=10000")
       (ent ignore "/etc/group" "ro,nosuid,nodev,relatime" "tmpfs" "rootfs" "rw,uid=10000,gid=10000")
       (ent "/kvm" "/dev/kvm" "rw,nosuid" "devtmpfs" "devtmpfs" ignore)
-      (ent "/etc" ignore "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
+      (ent "/etc" ignore "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
       (ent "/" "/run/user/1000" "rw,nosuid,nodev,relatime" "tmpfs" "ephemeral" "rw,size=8k,mode=755,uid=10000,gid=10000")
       (ent "/" "/run/nscd" "rw,nosuid,nodev,relatime" "tmpfs" "ephemeral" "rw,size=8k,mode=755,uid=10000,gid=10000")
       (ent "/" "/run/dbus" "rw,nosuid,nodev,relatime" "tmpfs" "ephemeral" "rw,size=8k,mode=755,uid=10000,gid=10000")

test/sandbox/case/pdlike.nix

@@ -49,7 +49,6 @@ in
     env = [
       "DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/65534/bus"
       "HOME=/var/lib/hakurei/u0/a5"
-      "PIPEWIRE_REMOTE=/run/user/65534/pipewire-0"
       "SHELL=/run/current-system/sw/bin/bash"
       "TERM=linux"
       "USER=u0_a5"
@@ -57,6 +56,7 @@ in
       "XDG_RUNTIME_DIR=/run/user/65534"
       "XDG_SESSION_CLASS=user"
       "XDG_SESSION_TYPE=wayland"
+      "PULSE_SERVER=unix:/run/user/65534/pulse/native"
     ];
 
     fs = fs "dead" {
@@ -98,6 +98,7 @@ in
         "fstab" = fs "80001ff" null null;
         "hsurc" = fs "80001ff" null null;
         "fuse.conf" = fs "80001ff" null null;
+        "gai.conf" = fs "80001ff" null null;
         "group" = fs "180" null "hakurei:x:65534:\n";
         "host.conf" = fs "80001ff" null null;
         "hostname" = fs "80001ff" null null;
@@ -160,12 +161,8 @@ in
         user = fs "800001ed" {
           "65534" = fs "800001f8" {
             bus = fs "10001fd" null null;
-            pulse = fs "800001c0" {
-              native = fs "10001ff" null null;
-              pid = fs "1a4" null null;
-            } null;
+            pulse = fs "800001c0" { native = fs "10001ff" null null; } null;
             wayland-0 = fs "1000038" null null;
-            pipewire-0 = fs "1000038" null null;
           } null;
         } null;
       } null;
@@ -214,8 +211,6 @@ in
                     home-manager = fs "800001ed" { gcroots = fs "800001ed" { current-home = fs "80001ff" null null; } null; } null;
                     nix = fs "800001ed" {
                       profiles = fs "800001ed" {
-                        home-manager = fs "80001ff" null null;
-                        home-manager-1-link = fs "80001ff" null null;
                         profile = fs "80001ff" null null;
                         profile-1-link = fs "80001ff" null null;
                       } null;
@@ -250,15 +245,14 @@ in
       (ent "/" "/dev/mqueue" "rw,nosuid,nodev,noexec,relatime" "mqueue" "mqueue" "rw")
       (ent "/" "/dev/shm" "rw,nosuid,nodev,relatime" "tmpfs" "ephemeral" "rw,uid=10005,gid=10005")
       (ent "/" "/run/user" "rw,nosuid,nodev,relatime" "tmpfs" "ephemeral" "rw,size=16384k,mode=755,uid=10005,gid=10005")
-      (ent "/tmp/hakurei.0/runtime/5" "/run/user/65534" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent "/tmp/hakurei.0/tmpdir/5" "/tmp" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
+      (ent "/tmp/hakurei.0/runtime/5" "/run/user/65534" "rw,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent "/tmp/hakurei.0/tmpdir/5" "/tmp" "rw,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
       (ent ignore "/etc/passwd" "ro,nosuid,nodev,relatime" "tmpfs" "rootfs" "rw,uid=10005,gid=10005")
       (ent ignore "/etc/group" "ro,nosuid,nodev,relatime" "tmpfs" "rootfs" "rw,uid=10005,gid=10005")
-      (ent ignore "/run/user/65534/wayland-0" "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent ignore "/run/user/65534/pipewire-0" "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent ignore "/run/user/65534/bus" "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent "/bin" "/bin" "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent "/usr/bin" "/usr/bin" "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
+      (ent ignore "/run/user/65534/wayland-0" "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent ignore "/run/user/65534/bus" "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent "/bin" "/bin" "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent "/usr/bin" "/usr/bin" "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
       (ent "/" "/nix/store" "ro,nosuid,nodev,relatime" "overlay" "overlay" "rw,lowerdir=/mnt-root/nix/.ro-store,upperdir=/mnt-root/nix/.rw-store/upper,workdir=/mnt-root/nix/.rw-store/work,uuid=on")
       (ent "/block" "/sys/block" "ro,nosuid,nodev,noexec,relatime" "sysfs" "sysfs" "rw")
       (ent "/bus" "/sys/bus" "ro,nosuid,nodev,noexec,relatime" "sysfs" "sysfs" "rw")
@@ -266,9 +260,10 @@ in
       (ent "/dev" "/sys/dev" "ro,nosuid,nodev,noexec,relatime" "sysfs" "sysfs" "rw")
       (ent "/devices" "/sys/devices" "ro,nosuid,nodev,noexec,relatime" "sysfs" "sysfs" "rw")
       (ent "/dri" "/dev/dri" "rw,nosuid" "devtmpfs" "devtmpfs" ignore)
-      (ent "/var/tmp" "/var/tmp" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent "/etc" ignore "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent "/var/lib/hakurei/u0/a5" "/var/lib/hakurei/u0/a5" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
+      (ent "/var/tmp" "/var/tmp" "rw,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent "/etc" ignore "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent "/var/lib/hakurei/u0/a5" "/var/lib/hakurei/u0/a5" "rw,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent ignore "/run/user/65534/pulse/native" "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
     ];
 
     seccomp = true;

test/sandbox/case/preset.nix

@@ -49,7 +49,6 @@ in
     env = [
       "DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/65534/bus"
       "HOME=/var/lib/hakurei/u0/a1"
-      "PIPEWIRE_REMOTE=/run/user/65534/pipewire-0"
       "SHELL=/run/current-system/sw/bin/bash"
       "TERM=linux"
       "USER=u0_a1"
@@ -57,6 +56,7 @@ in
       "XDG_RUNTIME_DIR=/run/user/65534"
       "XDG_SESSION_CLASS=user"
       "XDG_SESSION_TYPE=wayland"
+      "PULSE_SERVER=unix:/run/user/65534/pulse/native"
     ];
 
     fs = fs "dead" {
@@ -97,6 +97,7 @@ in
         "fstab" = fs "80001ff" null null;
         "hsurc" = fs "80001ff" null null;
         "fuse.conf" = fs "80001ff" null null;
+        "gai.conf" = fs "80001ff" null null;
         "group" = fs "180" null "hakurei:x:65534:\n";
         "host.conf" = fs "80001ff" null null;
         "hostname" = fs "80001ff" null null;
@@ -159,12 +160,8 @@ in
         user = fs "800001ed" {
           "65534" = fs "800001c0" {
             bus = fs "10001fd" null null;
-            pulse = fs "800001c0" {
-              native = fs "10001ff" null null;
-              pid = fs "1a4" null null;
-            } null;
+            pulse = fs "800001c0" { native = fs "10001ff" null null; } null;
             wayland-0 = fs "1000038" null null;
-            pipewire-0 = fs "1000038" null null;
           } null;
         } null;
       } null;
@@ -213,8 +210,6 @@ in
                     home-manager = fs "800001ed" { gcroots = fs "800001ed" { current-home = fs "80001ff" null null; } null; } null;
                     nix = fs "800001ed" {
                       profiles = fs "800001ed" {
-                        home-manager = fs "80001ff" null null;
-                        home-manager-1-link = fs "80001ff" null null;
                         profile = fs "80001ff" null null;
                         profile-1-link = fs "80001ff" null null;
                       } null;
@@ -251,11 +246,10 @@ in
       (ent "/" "/tmp" "rw,nosuid,nodev,relatime" "tmpfs" "ephemeral" "rw,uid=10001,gid=10001")
       (ent ignore "/etc/passwd" "ro,nosuid,nodev,relatime" "tmpfs" "rootfs" "rw,uid=10001,gid=10001")
       (ent ignore "/etc/group" "ro,nosuid,nodev,relatime" "tmpfs" "rootfs" "rw,uid=10001,gid=10001")
-      (ent ignore "/run/user/65534/wayland-0" "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent ignore "/run/user/65534/pipewire-0" "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent ignore "/run/user/65534/bus" "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent "/bin" "/bin" "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent "/usr/bin" "/usr/bin" "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
+      (ent ignore "/run/user/65534/wayland-0" "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent ignore "/run/user/65534/bus" "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent "/bin" "/bin" "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent "/usr/bin" "/usr/bin" "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
       (ent "/" "/nix/store" "ro,nosuid,nodev,relatime" "overlay" "overlay" "rw,lowerdir=/mnt-root/nix/.ro-store,upperdir=/mnt-root/nix/.rw-store/upper,workdir=/mnt-root/nix/.rw-store/work,uuid=on")
       (ent "/block" "/sys/block" "ro,nosuid,nodev,noexec,relatime" "sysfs" "sysfs" "rw")
       (ent "/bus" "/sys/bus" "ro,nosuid,nodev,noexec,relatime" "sysfs" "sysfs" "rw")
@@ -263,9 +257,10 @@ in
       (ent "/dev" "/sys/dev" "ro,nosuid,nodev,noexec,relatime" "sysfs" "sysfs" "rw")
       (ent "/devices" "/sys/devices" "ro,nosuid,nodev,noexec,relatime" "sysfs" "sysfs" "rw")
       (ent "/dri" "/dev/dri" "rw,nosuid" "devtmpfs" "devtmpfs" ignore)
-      (ent "/var/tmp" "/var/tmp" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent "/etc" ignore "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent "/var/lib/hakurei/u0/a1" "/var/lib/hakurei/u0/a1" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
+      (ent "/var/tmp" "/var/tmp" "rw,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent "/etc" ignore "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent "/var/lib/hakurei/u0/a1" "/var/lib/hakurei/u0/a1" "rw,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent ignore "/run/user/65534/pulse/native" "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
     ];
 
     seccomp = true;

test/sandbox/case/tty.nix

@@ -50,7 +50,6 @@ in
       "DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/65534/bus"
       "DISPLAY=:0"
       "HOME=/var/lib/hakurei/u0/a2"
-      "PIPEWIRE_REMOTE=/run/user/65534/pipewire-0"
       "SHELL=/run/current-system/sw/bin/bash"
       "TERM=linux"
       "USER=u0_a2"
@@ -58,6 +57,7 @@ in
       "XDG_RUNTIME_DIR=/run/user/65534"
       "XDG_SESSION_CLASS=user"
       "XDG_SESSION_TYPE=wayland"
+      "PULSE_SERVER=unix:/run/user/65534/pulse/native"
     ];
 
     fs = fs "dead" {
@@ -102,6 +102,7 @@ in
         "fstab" = fs "80001ff" null null;
         "hsurc" = fs "80001ff" null null;
         "fuse.conf" = fs "80001ff" null null;
+        "gai.conf" = fs "80001ff" null null;
         "group" = fs "180" null "hakurei:x:65534:\n";
         "host.conf" = fs "80001ff" null null;
         "hostname" = fs "80001ff" null null;
@@ -164,12 +165,8 @@ in
         user = fs "800001ed" {
           "65534" = fs "800001f8" {
             bus = fs "10001fd" null null;
-            pulse = fs "800001c0" {
-              native = fs "10001ff" null null;
-              pid = fs "1a4" null null;
-            } null;
+            pulse = fs "800001c0" { native = fs "10001ff" null null; } null;
             wayland-0 = fs "1000038" null null;
-            pipewire-0 = fs "1000038" null null;
           } null;
         } null;
       } null;
@@ -220,8 +217,6 @@ in
                     home-manager = fs "800001ed" { gcroots = fs "800001ed" { current-home = fs "80001ff" null null; } null; } null;
                     nix = fs "800001ed" {
                       profiles = fs "800001ed" {
-                        home-manager = fs "80001ff" null null;
-                        home-manager-1-link = fs "80001ff" null null;
                         profile = fs "80001ff" null null;
                         profile-1-link = fs "80001ff" null null;
                       } null;
@@ -257,16 +252,15 @@ in
       (ent "/" "/dev/mqueue" "rw,nosuid,nodev,noexec,relatime" "mqueue" "mqueue" "rw")
       (ent "/" "/dev/shm" "rw,nosuid,nodev,relatime" "tmpfs" "ephemeral" "rw,uid=10002,gid=10002")
       (ent "/" "/run/user" "rw,nosuid,nodev,relatime" "tmpfs" "ephemeral" "rw,size=16384k,mode=755,uid=10002,gid=10002")
-      (ent "/tmp/hakurei.0/runtime/2" "/run/user/65534" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
+      (ent "/tmp/hakurei.0/runtime/2" "/run/user/65534" "rw,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
       (ent "/" "/tmp" "rw,nosuid,nodev,relatime" "tmpfs" "ephemeral" "rw,uid=10002,gid=10002")
       (ent ignore "/etc/passwd" "ro,nosuid,nodev,relatime" "tmpfs" "rootfs" "rw,uid=10002,gid=10002")
       (ent ignore "/etc/group" "ro,nosuid,nodev,relatime" "tmpfs" "rootfs" "rw,uid=10002,gid=10002")
-      (ent ignore "/run/user/65534/wayland-0" "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent "/tmp/.X11-unix" "/tmp/.X11-unix" "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent ignore "/run/user/65534/pipewire-0" "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent ignore "/run/user/65534/bus" "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent "/bin" "/bin" "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent "/usr/bin" "/usr/bin" "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
+      (ent ignore "/run/user/65534/wayland-0" "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent "/tmp/.X11-unix" "/tmp/.X11-unix" "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent ignore "/run/user/65534/bus" "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent "/bin" "/bin" "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent "/usr/bin" "/usr/bin" "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
       (ent "/" "/nix/store" "ro,nosuid,nodev,relatime" "overlay" "overlay" "rw,lowerdir=/mnt-root/nix/.ro-store,upperdir=/mnt-root/nix/.rw-store/upper,workdir=/mnt-root/nix/.rw-store/work,uuid=on")
       (ent "/block" "/sys/block" "ro,nosuid,nodev,noexec,relatime" "sysfs" "sysfs" "rw")
       (ent "/bus" "/sys/bus" "ro,nosuid,nodev,noexec,relatime" "sysfs" "sysfs" "rw")
@@ -274,12 +268,13 @@ in
       (ent "/dev" "/sys/dev" "ro,nosuid,nodev,noexec,relatime" "sysfs" "sysfs" "rw")
       (ent "/devices" "/sys/devices" "ro,nosuid,nodev,noexec,relatime" "sysfs" "sysfs" "rw")
       (ent "/dri" "/dev/dri" "rw,nosuid" "devtmpfs" "devtmpfs" ignore)
-      (ent "/var/tmp" "/var/tmp" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent "/var/cache" "/var/cache" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
+      (ent "/var/tmp" "/var/tmp" "rw,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent "/var/cache" "/var/cache" "rw,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
       (ent "/" "/.hakurei/.ro-store" "rw,relatime" "overlay" "overlay" "ro,lowerdir=/host/nix/.ro-store:/host/nix/.rw-store/upper,redirect_dir=nofollow,userxattr")
       (ent "/" "/.hakurei/store" "rw,relatime" "overlay" "overlay" "rw,lowerdir=/host/nix/.ro-store:/host/nix/.rw-store/upper,upperdir=/host/tmp/.hakurei-store-rw/upper,workdir=/host/tmp/.hakurei-store-rw/work,redirect_dir=nofollow,uuid=on,userxattr")
-      (ent "/etc" ignore "ro,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
-      (ent "/var/lib/hakurei/u0/a2" "/var/lib/hakurei/u0/a2" "rw,nosuid,nodev,relatime" "ext4" "/dev/disk/by-label/nixos" "rw")
+      (ent "/etc" ignore "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent "/var/lib/hakurei/u0/a2" "/var/lib/hakurei/u0/a2" "rw,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
+      (ent ignore "/run/user/65534/pulse/native" "ro,nosuid,nodev,relatime" "ext4" "/dev/vda" "rw")
     ];
 
     seccomp = true;

test/sandbox/configuration.nix

@@ -6,7 +6,7 @@
 }:
 let
   testProgram = pkgs.callPackage ./tool/package.nix { inherit (config.environment.hakurei.package) version; };
-  testCases = import ./case pkgs.system lib testProgram;
+  testCases = import ./case pkgs.stdenv.hostPlatform.system lib testProgram;
 in
 {
   users.users = {
@@ -33,7 +33,7 @@ in
         hakurei -v run hakurei-test \
           -p "/var/tmp/.hakurei-check-ok.0" \
           -t ${toString (builtins.toFile "hakurei-pd-want.json" (builtins.toJSON testCases.pd.want))} \
-          -s ${testCases.pd.expectedFilter.${pkgs.system}} "$@"
+          -s ${testCases.pd.expectedFilter.${pkgs.stdenv.hostPlatform.system}} "$@"
       '')
     ];
 

test/sandbox/default.nix

@@ -1,12 +1,12 @@
 {
   lib,
-  nixosTest,
+  testers,
 
   self,
   withRace ? false,
 }:
 
-nixosTest {
+testers.nixosTest {
   name = "hakurei-sandbox" + (if withRace then "-race" else "");
   nodes.machine =
     { options, pkgs, ... }:

test/sandbox/test.py

@@ -79,8 +79,10 @@ check_sandbox("device")
 check_sandbox("pdlike")
 
 # Exit Sway and verify process exit status 0:
+machine.wait_until_fails("pgrep -x hakurei", timeout=5)
 swaymsg("exit", succeed=False)
 machine.wait_for_file("/tmp/sway-exit-ok")
 
 # Print hakurei runDir contents:
 print(machine.fail("ls /run/user/1000/hakurei"))
+machine.succeed("find /tmp -maxdepth 1 -type d -name '.hakurei-shim-*' -print -exec false '{}' +")

test/test.py

@@ -226,15 +226,17 @@ machine.send_chars("clear; pactl info && touch /var/tmp/pulse-ok\n")
 machine.wait_for_file("/var/tmp/pulse-ok", timeout=15)
 collect_state_ui("pulse_wayland")
 check_state("pa-foot", {"wayland": True, "pipewire": True})
-# Test PipeWire:
-machine.send_chars("clear; pw-cli i 0 && touch /var/tmp/pw-ok\n")
-machine.wait_for_file("/var/tmp/pw-ok", timeout=15)
-collect_state_ui("pipewire_wayland")
+machine.fail("find /tmp -maxdepth 1 -type d -name '.hakurei-shim-*' -print -exec false '{}' +")
 machine.send_chars("exit\n")
 machine.wait_until_fails("pgrep foot", timeout=5)
+machine.wait_until_fails("pgrep -x hakurei", timeout=5)
+machine.succeed("find /tmp -maxdepth 1 -type d -name '.hakurei-shim-*' -print -exec false '{}' +")
 # Test PipeWire SecurityContext:
 machine.succeed("sudo -u alice -i XDG_RUNTIME_DIR=/run/user/1000 hakurei -v run --pulse pactl info")
 machine.fail("sudo -u alice -i XDG_RUNTIME_DIR=/run/user/1000 hakurei -v run --pulse pactl set-sink-mute @DEFAULT_SINK@ toggle")
+# Test PipeWire direct access:
+machine.succeed("sudo -u alice -i XDG_RUNTIME_DIR=/run/user/1000 pw-dump")
+machine.fail("sudo -u alice -i XDG_RUNTIME_DIR=/run/user/1000 hakurei -v run --pipewire pw-dump")
 
 # Test XWayland (foot does not support X):
 swaymsg("exec x11-alacritty")
@@ -280,6 +282,7 @@ machine.send_key("ctrl-c")
 machine.wait_until_fails("pgrep foot", timeout=5)
 
 # Exit Sway and verify process exit status 0:
+machine.wait_until_fails("pgrep -x hakurei", timeout=5)
 swaymsg("exit", succeed=False)
 machine.wait_for_file("/tmp/sway-exit-ok")
 
@@ -289,6 +292,7 @@ print(machine.succeed("find /tmp/hakurei.0 "
     + "-path '/tmp/hakurei.0/tmpdir/*/*' -prune -o "
     + "-print"))
 print(machine.succeed("find /run/user/1000/hakurei"))
+machine.succeed("find /tmp -maxdepth 1 -type d -name '.hakurei-shim-*' -print -exec false '{}' +")
 
 # Verify go test status:
 machine.wait_for_file("/tmp/hakurei-test-done")