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-rw-r--r--src/modules/x11/module-x11-publish.c250
1 files changed, 250 insertions, 0 deletions
diff --git a/src/modules/x11/module-x11-publish.c b/src/modules/x11/module-x11-publish.c
new file mode 100644
index 0000000..68adf15
--- /dev/null
+++ b/src/modules/x11/module-x11-publish.c
@@ -0,0 +1,250 @@
+/***
+ This file is part of PulseAudio.
+
+ Copyright 2004-2006 Lennart Poettering
+
+ PulseAudio is free software; you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as published
+ by the Free Software Foundation; either version 2.1 of the License,
+ or (at your option) any later version.
+
+ PulseAudio is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <xcb/xcb.h>
+
+#include <pulse/xmalloc.h>
+
+#include <pulsecore/module.h>
+#include <pulsecore/modargs.h>
+#include <pulsecore/log.h>
+#include <pulsecore/x11wrap.h>
+#include <pulsecore/core-util.h>
+#include <pulsecore/native-common.h>
+#include <pulsecore/auth-cookie.h>
+#include <pulsecore/x11prop.h>
+#include <pulsecore/strlist.h>
+#include <pulsecore/protocol-native.h>
+
+PA_MODULE_AUTHOR("Lennart Poettering");
+PA_MODULE_DESCRIPTION("X11 credential publisher");
+PA_MODULE_VERSION(PACKAGE_VERSION);
+PA_MODULE_LOAD_ONCE(false);
+PA_MODULE_USAGE(
+ "display=<X11 display> "
+ "sink=<Sink to publish> "
+ "source=<Source to publish> "
+ "cookie=<Cookie file to publish> ");
+
+static const char* const valid_modargs[] = {
+ "display",
+ "sink",
+ "source",
+ "cookie",
+ "xauthority",
+ NULL
+};
+
+struct userdata {
+ pa_core *core;
+ pa_module *module;
+ pa_native_protocol *protocol;
+
+ char *id;
+ pa_auth_cookie *auth_cookie;
+
+ pa_x11_wrapper *x11_wrapper;
+ pa_x11_client *x11_client;
+
+ pa_hook_slot *hook_slot;
+};
+
+static void publish_servers(struct userdata *u, pa_strlist *l) {
+
+ int screen = DefaultScreen(pa_x11_wrapper_get_display(u->x11_wrapper));
+
+ if (l) {
+ char *s;
+
+ l = pa_strlist_reverse(l);
+ s = pa_strlist_to_string(l);
+ pa_strlist_reverse(l);
+
+ pa_x11_set_prop(pa_x11_wrapper_get_xcb_connection(u->x11_wrapper), screen, "PULSE_SERVER", s);
+ pa_xfree(s);
+ } else
+ pa_x11_del_prop(pa_x11_wrapper_get_xcb_connection(u->x11_wrapper), screen, "PULSE_SERVER");
+}
+
+static pa_hook_result_t servers_changed_cb(void *hook_data, void *call_data, void *slot_data) {
+ pa_strlist *servers = call_data;
+ struct userdata *u = slot_data;
+ char t[256];
+ int screen;
+
+ pa_assert(u);
+
+ screen = DefaultScreen(pa_x11_wrapper_get_display(u->x11_wrapper));
+ if (!pa_x11_get_prop(pa_x11_wrapper_get_xcb_connection(u->x11_wrapper), screen, "PULSE_ID", t, sizeof(t)) || !pa_streq(t, u->id)) {
+ pa_log_warn("PulseAudio information vanished from X11!");
+ return PA_HOOK_OK;
+ }
+
+ publish_servers(u, servers);
+ return PA_HOOK_OK;
+}
+
+static void x11_kill_cb(pa_x11_wrapper *w, void *userdata) {
+ struct userdata *u = userdata;
+
+ pa_assert(w);
+ pa_assert(u);
+ pa_assert(u->x11_wrapper == w);
+
+ if (u->x11_client)
+ pa_x11_client_free(u->x11_client);
+
+ if (u->x11_wrapper)
+ pa_x11_wrapper_unref(u->x11_wrapper);
+
+ u->x11_client = NULL;
+ u->x11_wrapper = NULL;
+
+ pa_module_unload_request(u->module, true);
+}
+
+int pa__init(pa_module*m) {
+ struct userdata *u;
+ pa_modargs *ma = NULL;
+ char *mid, *sid;
+ char hx[PA_NATIVE_COOKIE_LENGTH*2+1];
+ const char *t;
+ int screen;
+
+ pa_assert(m);
+
+ if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
+ pa_log("failed to parse module arguments");
+ goto fail;
+ }
+
+ m->userdata = u = pa_xnew(struct userdata, 1);
+ u->core = m->core;
+ u->module = m;
+ u->protocol = pa_native_protocol_get(m->core);
+ u->id = NULL;
+ u->auth_cookie = NULL;
+ u->x11_client = NULL;
+ u->x11_wrapper = NULL;
+
+ u->hook_slot = pa_hook_connect(&pa_native_protocol_hooks(u->protocol)[PA_NATIVE_HOOK_SERVERS_CHANGED], PA_HOOK_NORMAL, servers_changed_cb, u);
+
+ if (!(u->auth_cookie = pa_auth_cookie_get(m->core, pa_modargs_get_value(ma, "cookie", PA_NATIVE_COOKIE_FILE), true, PA_NATIVE_COOKIE_LENGTH)))
+ goto fail;
+
+ if (pa_modargs_get_value(ma, "xauthority", NULL)) {
+ if (setenv("XAUTHORITY", pa_modargs_get_value(ma, "xauthority", NULL), 1)) {
+ pa_log("setenv() for $XAUTHORITY failed");
+ goto fail;
+ }
+ }
+
+ if (!(u->x11_wrapper = pa_x11_wrapper_get(m->core, pa_modargs_get_value(ma, "display", NULL))))
+ goto fail;
+
+ screen = DefaultScreen(pa_x11_wrapper_get_display(u->x11_wrapper));
+ mid = pa_machine_id();
+ u->id = pa_sprintf_malloc("%lu@%s/%lu", (unsigned long) getuid(), mid, (unsigned long) getpid());
+ pa_xfree(mid);
+
+ pa_x11_set_prop(pa_x11_wrapper_get_xcb_connection(u->x11_wrapper), screen, "PULSE_ID", u->id);
+
+ if ((sid = pa_session_id())) {
+ pa_x11_set_prop(pa_x11_wrapper_get_xcb_connection(u->x11_wrapper), screen, "PULSE_SESSION_ID", sid);
+ pa_xfree(sid);
+ }
+
+ publish_servers(u, pa_native_protocol_servers(u->protocol));
+
+ if ((t = pa_modargs_get_value(ma, "source", NULL)))
+ pa_x11_set_prop(pa_x11_wrapper_get_xcb_connection(u->x11_wrapper), screen, "PULSE_SOURCE", t);
+
+ if ((t = pa_modargs_get_value(ma, "sink", NULL)))
+ pa_x11_set_prop(pa_x11_wrapper_get_xcb_connection(u->x11_wrapper), screen, "PULSE_SINK", t);
+
+ pa_x11_set_prop(pa_x11_wrapper_get_xcb_connection(u->x11_wrapper), screen, "PULSE_COOKIE",
+ pa_hexstr(pa_auth_cookie_read(u->auth_cookie, PA_NATIVE_COOKIE_LENGTH), PA_NATIVE_COOKIE_LENGTH, hx, sizeof(hx)));
+
+ u->x11_client = pa_x11_client_new(u->x11_wrapper, NULL, x11_kill_cb, u);
+
+ pa_modargs_free(ma);
+
+ return 0;
+
+fail:
+ if (ma)
+ pa_modargs_free(ma);
+
+ pa__done(m);
+
+ return -1;
+}
+
+void pa__done(pa_module*m) {
+ struct userdata*u;
+
+ pa_assert(m);
+
+ if (!(u = m->userdata))
+ return;
+
+ if (u->x11_client)
+ pa_x11_client_free(u->x11_client);
+
+ if (u->x11_wrapper) {
+ char t[256];
+ int screen = DefaultScreen(pa_x11_wrapper_get_display(u->x11_wrapper));
+
+ /* Yes, here is a race condition */
+ if (!pa_x11_get_prop(pa_x11_wrapper_get_xcb_connection(u->x11_wrapper), screen, "PULSE_ID", t, sizeof(t)) || !pa_streq(t, u->id))
+ pa_log_warn("PulseAudio information vanished from X11!");
+ else {
+ pa_x11_del_prop(pa_x11_wrapper_get_xcb_connection(u->x11_wrapper), screen, "PULSE_ID");
+ pa_x11_del_prop(pa_x11_wrapper_get_xcb_connection(u->x11_wrapper), screen, "PULSE_SERVER");
+ pa_x11_del_prop(pa_x11_wrapper_get_xcb_connection(u->x11_wrapper), screen, "PULSE_SINK");
+ pa_x11_del_prop(pa_x11_wrapper_get_xcb_connection(u->x11_wrapper), screen, "PULSE_SOURCE");
+ pa_x11_del_prop(pa_x11_wrapper_get_xcb_connection(u->x11_wrapper), screen, "PULSE_COOKIE");
+ pa_x11_del_prop(pa_x11_wrapper_get_xcb_connection(u->x11_wrapper), screen, "PULSE_SESSION_ID");
+ xcb_flush(pa_x11_wrapper_get_xcb_connection(u->x11_wrapper));
+ }
+
+ pa_x11_wrapper_unref(u->x11_wrapper);
+ }
+
+ if (u->auth_cookie)
+ pa_auth_cookie_unref(u->auth_cookie);
+
+ if (u->hook_slot)
+ pa_hook_slot_free(u->hook_slot);
+
+ if (u->protocol)
+ pa_native_protocol_unref(u->protocol);
+
+ pa_xfree(u->id);
+ pa_xfree(u);
+}
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