src/posix/specific.c

   1 /*****************************************************************************
   2  * specific.c: stubs for POSIX OS-specific initialization
   3  *****************************************************************************
   4  * Copyright © 2008 Rémi Denis-Courmont
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU Lesser General Public License as published by
   8  * the Free Software Foundation; either version 2.1 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  19  *****************************************************************************/
  20
  21 #ifdef HAVE_CONFIG_H
  22 # include "config.h"
  23 #endif
  24
  25 #include <vlc_common.h>
  26 #include "../libvlc.h"
  27 #include "../lib/libvlc_internal.h"
  28
  29 #ifdef HAVE_DBUS
  30 /* used for one-instance mode */
  31 # include <dbus/dbus.h>
  32 # include <vlc_url.h>
  33 #endif
  34
  35 void system_Init (void)
  36 {
  37 }
  38
  39 static void system_ConfigureDbus(libvlc_int_t *vlc, int argc,
  40                                  const char *const argv[])
  41 {
  42 /* FIXME: could be replaced by using Unix sockets */
  43 #ifdef HAVE_DBUS
  44 # define MPRIS_APPEND "/org/mpris/MediaPlayer2/TrackList/Append"
  45 # define MPRIS_BUS_NAME "org.mpris.MediaPlayer2.vlc"
  46 # define MPRIS_OBJECT_PATH "/org/mpris/MediaPlayer2"
  47 # define MPRIS_TRACKLIST_INTERFACE "org.mpris.MediaPlayer2.TrackList"
  48
  49     dbus_threads_init_default();
  50
  51     if (var_InheritBool(vlc, "dbus"))
  52         libvlc_InternalAddIntf(vlc, "dbus,none");
  53
  54     if (!var_InheritBool(vlc, "one-instance")
  55      && !(var_InheritBool(vlc, "one-instance-when-started-from-file")
  56        && var_InheritBool(vlc, "started-from-file")))
  57          return;
  58
  59     for (int i = 0; i < argc; i++)
  60         if (argv[i][0] == ':')
  61         {
  62             msg_Err(vlc, "item option %s incompatible with single instance",
  63                     argv[i]);
  64             return;
  65         }
  66
  67     char *name = var_GetString(vlc, "dbus-mpris-name");
  68     if (name != NULL)
  69     {
  70         bool singleton = !strcmp(name, MPRIS_BUS_NAME);
  71         free(name);
  72         if (singleton)
  73         {
  74             msg_Dbg(vlc, "no running VLC instance - continuing normally...");
  75             return; /* This is the single instance */
  76         }
  77     }
  78
  79     /* Initialise D-Bus interface, check for other instances */
  80     DBusError err;
  81     dbus_error_init(&err);
  82
  83     /* connect to the session bus */
  84     DBusConnection *conn = dbus_bus_get(DBUS_BUS_SESSION, &err);
  85     if (conn == NULL)
  86     {
  87         msg_Err(vlc, "D-Bus session bus connection failure: %s",
  88                  err.message);
  89         dbus_error_free(&err);
  90         return;
  91     }
  92
  93     msg_Warn(vlc, "running VLC instance - exiting...");
  94
  95     const dbus_bool_t play = !var_InheritBool(vlc, "playlist-enqueue");
  96
  97     for (int i = 0; i < argc; i++)
  98     {
  99         DBusMessage *req = dbus_message_new_method_call(MPRIS_BUS_NAME,
 100             MPRIS_OBJECT_PATH, MPRIS_TRACKLIST_INTERFACE, "AddTrack");
 101         if (unlikely(req == NULL))
 102             continue;
 103
 104         /* We need to resolve relative paths in this instance */
 105         char *mrlbuf = NULL;
 106         const char *mrl;
 107
 108         if (strstr(argv[i], "://"))
 109             mrl = argv[i];
 110         else
 111         {
 112             mrlbuf = vlc_path2uri(argv[i], NULL);
 113             if (unlikely(mrlbuf == NULL))
 114             {
 115                 dbus_message_unref(req);
 116                 continue;
 117             }
 118             mrl = mrlbuf;
 119         }
 120
 121         /* append MRLs */
 122         msg_Dbg(vlc, "adding track %s to running instance", mrl);
 123
 124         const char *after_track = MPRIS_APPEND;
 125         dbus_bool_t ok = dbus_message_append_args(req, DBUS_TYPE_STRING, &mrl,
 126                                            DBUS_TYPE_OBJECT_PATH, &after_track,
 127                                            DBUS_TYPE_BOOLEAN, &play,
 128                                            DBUS_TYPE_INVALID);
 129         free(mrlbuf);
 130         if (unlikely(!ok))
 131         {
 132              dbus_message_unref(req);
 133              continue;
 134         }
 135
 136         /* send message and get a handle for a reply */
 137         DBusMessage *reply = dbus_connection_send_with_reply_and_block(conn,
 138                                                                 req, -1, &err);
 139         dbus_message_unref(req);
 140         if (reply == NULL)
 141         {
 142             msg_Err(vlc, "D-Bus error: %s", err.message);
 143             dbus_error_free(&err);
 144             continue;
 145         }
 146         dbus_message_unref(reply);
 147     }
 148
 149     /* we unreference the connection when we've finished with it */
 150     dbus_connection_unref(conn);
 151     exit(0);
 152 #else
 153     (void) vlc; (void) argc; (void) argv;
 154 #endif // HAVE_DBUS
 155 }
 156
 157 void system_Configure(libvlc_int_t *libvlc,
 158                       int argc, const char *const argv[])
 159 {
 160     system_ConfigureDbus(libvlc, argc, argv);
 161 }