/*** 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 . ***/ #ifdef HAVE_CONFIG_H #include #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include 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= " "sink= " "source= " "cookie= "); 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); }