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92e059280f
Use either g_get_real_time() or g_date_time_new_now_local(). This means we don’t need to worry about time_t being 32b in future (the year 2038 problem), and it makes the need for error handling a bit more explicit. Improve the error handling in several cases. Based on a patch by Niels De Graef (https://gitlab.gnome.org/GNOME/glib/merge_requests/142). Signed-off-by: Philip Withnall <withnall@endlessm.com> https://gitlab.gnome.org/GNOME/glib/issues/1402
132 lines
3.8 KiB
C
132 lines
3.8 KiB
C
#include <string.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <time.h>
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#include <gio/gio.h>
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#include <gio/gunixfdlist.h>
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/* see gdbus-example-server.c for the server implementation */
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static gint
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get_server_stdout (GDBusConnection *connection,
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const gchar *name_owner,
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GError **error)
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{
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GDBusMessage *method_call_message;
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GDBusMessage *method_reply_message;
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GUnixFDList *fd_list;
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gint fd;
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fd = -1;
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method_call_message = NULL;
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method_reply_message = NULL;
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method_call_message = g_dbus_message_new_method_call (name_owner,
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"/org/gtk/GDBus/TestObject",
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"org.gtk.GDBus.TestInterface",
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"GimmeStdout");
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method_reply_message = g_dbus_connection_send_message_with_reply_sync (connection,
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method_call_message,
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G_DBUS_SEND_MESSAGE_FLAGS_NONE,
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-1,
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NULL, /* out_serial */
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NULL, /* cancellable */
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error);
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if (method_reply_message == NULL)
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goto out;
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if (g_dbus_message_get_message_type (method_reply_message) == G_DBUS_MESSAGE_TYPE_ERROR)
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{
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g_dbus_message_to_gerror (method_reply_message, error);
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goto out;
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}
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fd_list = g_dbus_message_get_unix_fd_list (method_reply_message);
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fd = g_unix_fd_list_get (fd_list, 0, error);
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out:
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g_object_unref (method_call_message);
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g_object_unref (method_reply_message);
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return fd;
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}
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static void
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on_name_appeared (GDBusConnection *connection,
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const gchar *name,
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const gchar *name_owner,
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gpointer user_data)
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{
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gint fd;
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GError *error;
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error = NULL;
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fd = get_server_stdout (connection, name_owner, &error);
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if (fd == -1)
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{
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g_printerr ("Error invoking GimmeStdout(): %s\n",
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error->message);
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g_error_free (error);
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exit (1);
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}
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else
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{
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gchar *now_buf = NULL;
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gssize len;
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gchar *str;
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GDateTime *now = g_date_time_new_now_local ();
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g_assert_nonnull (now);
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now_buf = g_date_time_format (now, "%Y-%m-%d %H:%M:%S");
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g_date_time_unref (now);
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str = g_strdup_printf ("On %s, gdbus-example-unix-fd-client with pid %d was here!\n",
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now_buf,
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(gint) getpid ());
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len = strlen (str);
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g_warn_if_fail (write (fd, str, len) == len);
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close (fd);
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g_print ("Wrote the following on server's stdout:\n%s", str);
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g_free (str);
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g_free (now_buf);
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exit (0);
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}
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}
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static void
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on_name_vanished (GDBusConnection *connection,
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const gchar *name,
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gpointer user_data)
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{
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g_printerr ("Failed to get name owner for %s\n"
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"Is ./gdbus-example-server running?\n",
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name);
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exit (1);
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}
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int
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main (int argc, char *argv[])
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{
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guint watcher_id;
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GMainLoop *loop;
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watcher_id = g_bus_watch_name (G_BUS_TYPE_SESSION,
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"org.gtk.GDBus.TestServer",
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G_BUS_NAME_WATCHER_FLAGS_NONE,
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on_name_appeared,
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on_name_vanished,
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NULL,
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NULL);
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loop = g_main_loop_new (NULL, FALSE);
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g_main_loop_run (loop);
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g_bus_unwatch_name (watcher_id);
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return 0;
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}
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