code.delx.au - pulseaudio/blob - src/modules/module-x11-publish.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   Copyright 2004-2006 Lennart Poettering
   7
   8   PulseAudio is free software; you can redistribute it and/or modify
   9   it under the terms of the GNU Lesser General Public License as published
  10   by the Free Software Foundation; either version 2 of the License,
  11   or (at your option) any later version.
  12
  13   PulseAudio is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with PulseAudio; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21   USA.
  22 ***/
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include <stdio.h>
  29 #include <assert.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <unistd.h>
  33
  34 #include <X11/Xlib.h>
  35 #include <X11/Xatom.h>
  36
  37 #include <pulse/util.h>
  38 #include <pulse/xmalloc.h>
  39
  40 #include <pulsecore/module.h>
  41 #include <pulsecore/sink.h>
  42 #include <pulsecore/core-scache.h>
  43 #include <pulsecore/modargs.h>
  44 #include <pulsecore/namereg.h>
  45 #include <pulsecore/log.h>
  46 #include <pulsecore/x11wrap.h>
  47 #include <pulsecore/core-util.h>
  48 #include <pulsecore/native-common.h>
  49 #include <pulsecore/authkey-prop.h>
  50 #include <pulsecore/authkey.h>
  51 #include <pulsecore/x11prop.h>
  52 #include <pulsecore/strlist.h>
  53 #include <pulsecore/props.h>
  54
  55 #include "module-x11-publish-symdef.h"
  56
  57 PA_MODULE_AUTHOR("Lennart Poettering")
  58 PA_MODULE_DESCRIPTION("X11 Credential Publisher")
  59 PA_MODULE_VERSION(PACKAGE_VERSION)
  60 PA_MODULE_USAGE("display=<X11 display>")
  61
  62 static const char* const valid_modargs[] = {
  63     "display",
  64     "sink",
  65     "source",
  66     "cookie",
  67     NULL
  68 };
  69
  70 struct userdata {
  71     pa_core *core;
  72     pa_x11_wrapper *x11_wrapper;
  73     char *id;
  74     uint8_t auth_cookie[PA_NATIVE_COOKIE_LENGTH];
  75     int auth_cookie_in_property;
  76 };
  77
  78 static int load_key(struct userdata *u, const char*fn) {
  79     assert(u);
  80
  81     u->auth_cookie_in_property = 0;
  82
  83     if (!fn && pa_authkey_prop_get(u->core, PA_NATIVE_COOKIE_PROPERTY_NAME, u->auth_cookie, sizeof(u->auth_cookie)) >= 0) {
  84         pa_log_debug("using already loaded auth cookie.");
  85         pa_authkey_prop_ref(u->core, PA_NATIVE_COOKIE_PROPERTY_NAME);
  86         u->auth_cookie_in_property = 1;
  87         return 0;
  88     }
  89
  90     if (!fn)
  91         fn = PA_NATIVE_COOKIE_FILE;
  92
  93     if (pa_authkey_load_auto(fn, u->auth_cookie, sizeof(u->auth_cookie)) < 0)
  94         return -1;
  95
  96     pa_log_debug("loading cookie from disk.");
  97
  98     if (pa_authkey_prop_put(u->core, PA_NATIVE_COOKIE_PROPERTY_NAME, u->auth_cookie, sizeof(u->auth_cookie)) >= 0)
  99         u->auth_cookie_in_property = 1;
 100
 101     return 0;
 102 }
 103
 104 int pa__init(pa_core *c, pa_module*m) {
 105     struct userdata *u;
 106     pa_modargs *ma = NULL;
 107     char hn[256], un[128];
 108     char hx[PA_NATIVE_COOKIE_LENGTH*2+1];
 109     const char *t;
 110     char *s;
 111     pa_strlist *l;
 112
 113     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 114         pa_log("failed to parse module arguments");
 115         goto fail;
 116     }
 117
 118     m->userdata = u = pa_xmalloc(sizeof(struct userdata));
 119     u->core = c;
 120     u->id = NULL;
 121     u->auth_cookie_in_property = 0;
 122
 123     if (load_key(u, pa_modargs_get_value(ma, "cookie", NULL)) < 0)
 124         goto fail;
 125
 126     if (!(u->x11_wrapper = pa_x11_wrapper_get(c, pa_modargs_get_value(ma, "display", NULL))))
 127         goto fail;
 128
 129     if (!(l = pa_property_get(c, PA_NATIVE_SERVER_PROPERTY_NAME)))
 130         goto fail;
 131
 132     s = pa_strlist_tostring(l);
 133     pa_x11_set_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "PULSE_SERVER", s);
 134     pa_xfree(s);
 135
 136     if (!pa_get_fqdn(hn, sizeof(hn)) || !pa_get_user_name(un, sizeof(un)))
 137         goto fail;
 138
 139     u->id = pa_sprintf_malloc("%s@%s/%u", un, hn, (unsigned) getpid());
 140     pa_x11_set_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "PULSE_ID", u->id);
 141
 142     if ((t = pa_modargs_get_value(ma, "source", NULL)))
 143         pa_x11_set_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "PULSE_SOURCE", t);
 144
 145     if ((t = pa_modargs_get_value(ma, "sink", NULL)))
 146         pa_x11_set_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "PULSE_SINK", t);
 147
 148     pa_x11_set_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "PULSE_COOKIE", pa_hexstr(u->auth_cookie, sizeof(u->auth_cookie), hx, sizeof(hx)));
 149
 150     pa_modargs_free(ma);
 151     return 0;
 152
 153 fail:
 154     if (ma)
 155         pa_modargs_free(ma);
 156
 157     pa__done(c, m);
 158     return -1;
 159 }
 160
 161 void pa__done(pa_core *c, pa_module*m) {
 162     struct userdata*u;
 163     assert(c && m);
 164
 165     if (!(u = m->userdata))
 166         return;
 167
 168     if (u->x11_wrapper) {
 169         char t[256];
 170
 171         /* Yes, here is a race condition */
 172         if (!pa_x11_get_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "PULSE_ID", t, sizeof(t)) || strcmp(t, u->id))
 173             pa_log_warn("PulseAudio information vanished from X11!");
 174         else {
 175             pa_x11_del_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "PULSE_ID");
 176             pa_x11_del_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "PULSE_SERVER");
 177             pa_x11_del_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "PULSE_SINK");
 178             pa_x11_del_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "PULSE_SOURCE");
 179             pa_x11_del_prop(pa_x11_wrapper_get_display(u->x11_wrapper), "PULSE_COOKIE");
 180             XSync(pa_x11_wrapper_get_display(u->x11_wrapper), False);
 181         }
 182     }
 183
 184     if (u->x11_wrapper)
 185         pa_x11_wrapper_unref(u->x11_wrapper);
 186
 187     if (u->auth_cookie_in_property)
 188         pa_authkey_prop_unref(c, PA_NATIVE_COOKIE_PROPERTY_NAME);
 189
 190     pa_xfree(u->id);
 191     pa_xfree(u);
 192 }
 193