From e063cc38a97e949e654a1be71c2b3e7578517649 Mon Sep 17 00:00:00 2001
From: Wim Taymans <wtaymans@redhat.com>
Date: Thu, 12 Oct 2023 18:41:37 +0200
Subject: [PATCH] alsa: add alsa.deny to fail init of the PCM

Handy to block audacity from probing the hardware.
---
 pipewire-alsa/alsa-plugins/pcm_pipewire.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pipewire-alsa/alsa-plugins/pcm_pipewire.c b/pipewire-alsa/alsa-plugins/pcm_pipewire.c
index 29846d476..45b0e8aa7 100644
--- a/pipewire-alsa/alsa-plugins/pcm_pipewire.c
+++ b/pipewire-alsa/alsa-plugins/pcm_pipewire.c
@@ -1238,6 +1238,12 @@ static int snd_pcm_pipewire_open(snd_pcm_t **pcmp,
 	if (str != NULL)
 		pw_properties_update_string(pw->props, str, strlen(str));
 
+	if ((str = pw_properties_get(pw->props, "alsa.deny")) != NULL &&
+	    spa_atob(str)) {
+		err = -EACCES;
+		goto error;
+	}
+
 	str = getenv("PIPEWIRE_NODE");
 	if (str != NULL && str[0])
 		pw_properties_set(pw->props, PW_KEY_TARGET_OBJECT, str);