mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-11-07 13:30:03 -05:00
0ac038e591
If the X11 property data is from the same session than the client the client may do autospawning in case the X11 property data is stale. Closes #518.
245 lines
6.9 KiB
C
245 lines
6.9 KiB
C
/***
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This file is part of PulseAudio.
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Copyright 2004-2006 Lennart Poettering
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2.1 of the License,
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or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with PulseAudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <X11/Xlib.h>
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#include <X11/Xatom.h>
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#include <pulse/util.h>
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#include <pulse/xmalloc.h>
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#include <pulsecore/module.h>
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#include <pulsecore/sink.h>
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#include <pulsecore/core-scache.h>
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#include <pulsecore/modargs.h>
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#include <pulsecore/namereg.h>
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#include <pulsecore/log.h>
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#include <pulsecore/x11wrap.h>
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#include <pulsecore/core-util.h>
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#include <pulsecore/native-common.h>
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#include <pulsecore/auth-cookie.h>
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#include <pulsecore/x11prop.h>
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#include <pulsecore/strlist.h>
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#include <pulsecore/shared.h>
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#include <pulsecore/protocol-native.h>
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#include "module-x11-publish-symdef.h"
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PA_MODULE_AUTHOR("Lennart Poettering");
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PA_MODULE_DESCRIPTION("X11 credential publisher");
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PA_MODULE_VERSION(PACKAGE_VERSION);
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PA_MODULE_LOAD_ONCE(FALSE);
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PA_MODULE_USAGE(
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"display=<X11 display> "
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"sink=<Sink to publish> "
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"source=<Source to publish> "
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"cookie=<Cookie file to publish> ");
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static const char* const valid_modargs[] = {
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"display",
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"sink",
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"source",
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"cookie",
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NULL
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};
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struct userdata {
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pa_core *core;
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pa_module *module;
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pa_native_protocol *protocol;
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char *id;
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pa_auth_cookie *auth_cookie;
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pa_x11_wrapper *x11_wrapper;
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pa_x11_client *x11_client;
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pa_hook_slot *hook_slot;
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};
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static void publish_servers(struct userdata *u, pa_strlist *l) {
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if (l) {
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char *s;
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l = pa_strlist_reverse(l);
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s = pa_strlist_tostring(l);
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l = pa_strlist_reverse(l);
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pa_x11_set_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "PULSE_SERVER", s);
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pa_xfree(s);
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} else
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pa_x11_del_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "PULSE_SERVER");
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}
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static pa_hook_result_t servers_changed_cb(void *hook_data, void *call_data, void *slot_data) {
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pa_strlist *servers = call_data;
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struct userdata *u = slot_data;
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char t[256];
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pa_assert(u);
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if (!pa_x11_get_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "PULSE_ID", t, sizeof(t)) || strcmp(t, u->id)) {
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pa_log_warn("PulseAudio information vanished from X11!");
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return PA_HOOK_OK;
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}
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publish_servers(u, servers);
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return PA_HOOK_OK;
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}
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static void x11_kill_cb(pa_x11_wrapper *w, void *userdata) {
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struct userdata *u = userdata;
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pa_assert(w);
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pa_assert(u);
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pa_assert(u->x11_wrapper == w);
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if (u->x11_client)
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pa_x11_client_free(u->x11_client);
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if (u->x11_wrapper)
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pa_x11_wrapper_unref(u->x11_wrapper);
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u->x11_client = NULL;
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u->x11_wrapper = NULL;
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pa_module_unload_request(u->module, TRUE);
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}
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int pa__init(pa_module*m) {
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struct userdata *u;
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pa_modargs *ma = NULL;
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char *mid, *sid;
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char hx[PA_NATIVE_COOKIE_LENGTH*2+1];
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const char *t;
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pa_assert(m);
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if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
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pa_log("failed to parse module arguments");
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goto fail;
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}
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m->userdata = u = pa_xnew(struct userdata, 1);
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u->core = m->core;
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u->module = m;
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u->protocol = pa_native_protocol_get(m->core);
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u->id = NULL;
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u->auth_cookie = NULL;
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u->x11_client = NULL;
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u->x11_wrapper = NULL;
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u->hook_slot = pa_hook_connect(&pa_native_protocol_hooks(u->protocol)[PA_NATIVE_HOOK_SERVERS_CHANGED], PA_HOOK_NORMAL, servers_changed_cb, u);
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if (!(u->auth_cookie = pa_auth_cookie_get(m->core, pa_modargs_get_value(ma, "cookie", PA_NATIVE_COOKIE_FILE), PA_NATIVE_COOKIE_LENGTH)))
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goto fail;
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if (!(u->x11_wrapper = pa_x11_wrapper_get(m->core, pa_modargs_get_value(ma, "display", NULL))))
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goto fail;
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mid = pa_machine_id();
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u->id = pa_sprintf_malloc("%lu@%s/%lu", (unsigned long) getuid(), mid, (unsigned long) getpid());
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pa_xfree(mid);
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pa_x11_set_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "PULSE_ID", u->id);
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if ((sid = pa_session_id())) {
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pa_x11_set_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "PULSE_SESSION_ID", sid);
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pa_xfree(sid);
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}
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publish_servers(u, pa_native_protocol_servers(u->protocol));
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if ((t = pa_modargs_get_value(ma, "source", NULL)))
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pa_x11_set_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "PULSE_SOURCE", t);
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if ((t = pa_modargs_get_value(ma, "sink", NULL)))
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pa_x11_set_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "PULSE_SINK", t);
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pa_x11_set_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "PULSE_COOKIE",
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pa_hexstr(pa_auth_cookie_read(u->auth_cookie, PA_NATIVE_COOKIE_LENGTH), PA_NATIVE_COOKIE_LENGTH, hx, sizeof(hx)));
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u->x11_client = pa_x11_client_new(u->x11_wrapper, NULL, x11_kill_cb, u);
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pa_modargs_free(ma);
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return 0;
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fail:
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if (ma)
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pa_modargs_free(ma);
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pa__done(m);
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return -1;
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}
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void pa__done(pa_module*m) {
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struct userdata*u;
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pa_assert(m);
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if (!(u = m->userdata))
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return;
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if (u->x11_client)
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pa_x11_client_free(u->x11_client);
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if (u->x11_wrapper) {
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char t[256];
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/* Yes, here is a race condition */
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if (!pa_x11_get_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "PULSE_ID", t, sizeof(t)) || strcmp(t, u->id))
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pa_log_warn("PulseAudio information vanished from X11!");
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else {
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pa_x11_del_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "PULSE_ID");
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pa_x11_del_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "PULSE_SERVER");
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pa_x11_del_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "PULSE_SINK");
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pa_x11_del_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "PULSE_SOURCE");
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pa_x11_del_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "PULSE_COOKIE");
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pa_x11_del_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "PULSE_SESSION_ID");
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XSync(pa_x11_wrapper_get_display(u->x11_wrapper), False);
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}
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pa_x11_wrapper_unref(u->x11_wrapper);
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}
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if (u->auth_cookie)
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pa_auth_cookie_unref(u->auth_cookie);
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if (u->hook_slot)
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pa_hook_slot_free(u->hook_slot);
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if (u->protocol)
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pa_native_protocol_unref(u->protocol);
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pa_xfree(u->id);
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pa_xfree(u);
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}
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