gio/tests/gdbus-example-unix-fd-client.c

   1 /*
   2  * Copyright © 2010 Red Hat, Inc.
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU Lesser General Public License as published
   6  * by the Free Software Foundation; either version 2 of the licence or (at
   7  * your option) any later version.
   8  *
   9  * See the included COPYING file for more information.
  10  *
  11  * Author: David Zeuthen <davidz@redhat.com>
  12  */
  13
  14 #include <string.h>
  15 #include <stdlib.h>
  16
  17 #include <sys/types.h>
  18 #include <unistd.h>
  19
  20 #include <time.h>
  21
  22 #include <gio/gio.h>
  23
  24 /* see gdbus-example-server.c for the server implementation */
  25 static gint
  26 get_server_stdout (GDBusConnection  *connection,
  27                    const gchar      *name_owner,
  28                    GError          **error)
  29 {
  30   GDBusMessage *method_call_message;
  31   GDBusMessage *method_reply_message;
  32   GUnixFDList *fd_list;
  33   gint fd;
  34
  35   fd = -1;
  36   method_call_message = NULL;
  37   method_reply_message = NULL;
  38
  39   method_call_message = g_dbus_message_new_method_call (name_owner,
  40                                                         "/org/gtk/GDBus/TestObject",
  41                                                         "org.gtk.GDBus.TestInterface",
  42                                                         "GimmeStdout");
  43   method_reply_message = g_dbus_connection_send_message_with_reply_sync (connection,
  44                                                                          method_call_message,
  45                                                                          -1,
  46                                                                          NULL, /* out_serial */
  47                                                                          NULL, /* cancellable */
  48                                                                          error);
  49   if (method_reply_message == NULL)
  50       goto out;
  51
  52   if (g_dbus_message_get_message_type (method_reply_message) == G_DBUS_MESSAGE_TYPE_ERROR)
  53     {
  54       g_dbus_message_to_gerror (method_reply_message, error);
  55       goto out;
  56     }
  57
  58   fd_list = g_dbus_message_get_unix_fd_list (method_reply_message);
  59   fd = g_unix_fd_list_get (fd_list, 0, error);
  60
  61  out:
  62   g_object_unref (method_call_message);
  63   g_object_unref (method_reply_message);
  64
  65   return fd;
  66 }
  67
  68 static void
  69 on_name_appeared (GDBusConnection *connection,
  70                   const gchar     *name,
  71                   const gchar     *name_owner,
  72                   gpointer         user_data)
  73 {
  74   gint fd;
  75   GError *error;
  76
  77   error = NULL;
  78   fd = get_server_stdout (connection, name_owner, &error);
  79   if (fd == -1)
  80     {
  81       g_printerr ("Error invoking GimmeStdout(): %s\n",
  82                   error->message);
  83       g_error_free (error);
  84       exit (1);
  85     }
  86   else
  87     {
  88       gchar now_buf[256];
  89       time_t now;
  90       gssize len;
  91       gchar *str;
  92
  93       now = time (NULL);
  94       strftime (now_buf,
  95                 sizeof now_buf,
  96                 "%c",
  97                 localtime (&now));
  98
  99       str = g_strdup_printf ("On %s, gdbus-example-unix-fd-client with pid %d was here!\n",
 100                              now_buf,
 101                              (gint) getpid ());
 102       len = strlen (str);
 103       g_warn_if_fail (write (fd, str, len) == len);
 104       close (fd);
 105
 106       g_print ("Wrote the following on server's stdout:\n%s", str);
 107
 108       g_free (str);
 109       exit (0);
 110     }
 111 }
 112
 113 static void
 114 on_name_vanished (GDBusConnection *connection,
 115                   const gchar     *name,
 116                   gpointer         user_data)
 117 {
 118   g_printerr ("Failed to get name owner for %s\n"
 119               "Is ./gdbus-example-server running?\n",
 120               name);
 121   exit (1);
 122 }
 123
 124 int
 125 main (int argc, char *argv[])
 126 {
 127   guint watcher_id;
 128   GMainLoop *loop;
 129
 130   g_type_init ();
 131
 132   watcher_id = g_bus_watch_name (G_BUS_TYPE_SESSION,
 133                                  "org.gtk.GDBus.TestServer",
 134                                  G_BUS_NAME_WATCHER_FLAGS_NONE,
 135                                  on_name_appeared,
 136                                  on_name_vanished,
 137                                  NULL,
 138                                  NULL);
 139
 140   loop = g_main_loop_new (NULL, FALSE);
 141   g_main_loop_run (loop);
 142
 143   g_bus_unwatch_name (watcher_id);
 144   return 0;
 145 }