From 39f6aff4501ca4c06932b526d1837a93bf9796fc Mon Sep 17 00:00:00 2001
From: "Eric S. Raymond" <esr@thyrsus.com>
Date: Tue, 27 Sep 2011 00:34:33 -0400
Subject: Belated commit of new file created by gpxlogger refactoring.

---
 libgps_dbus.c | 133 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 133 insertions(+)
 create mode 100644 libgps_dbus.c

(limited to 'libgps_dbus.c')

diff --git a/libgps_dbus.c b/libgps_dbus.c
new file mode 100644
index 00000000..6f031108
--- /dev/null
+++ b/libgps_dbus.c
@@ -0,0 +1,133 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <string.h>
+#include <syslog.h>
+#include <math.h>
+#include <time.h>
+#include <errno.h>
+#include <libgen.h>
+#include <signal.h>
+#ifndef S_SPLINT_S
+#include <unistd.h>
+#endif /* S_SPLINT_S */
+
+#include "gps.h"
+#include "gpsd_config.h"
+
+#if defined(DBUS_EXPORT_ENABLE) && !defined(S_SPLINT_S)
+
+struct privdata_t
+{
+    void (*handler)(struct gps_data_t *);
+};
+#define PRIVATE(gpsdata) ((struct privdata_t *)(gpsdata)->privdata)
+
+#include <glib.h>
+#include <dbus/dbus.h>
+#include <dbus/dbus-glib-lowlevel.h>
+#include <dbus/dbus-glib.h>
+
+#include <glib/gprintf.h>
+
+DBusConnection *connection;
+
+static char gpsd_devname[BUFSIZ];
+
+static DBusHandlerResult handle_gps_fix(DBusMessage * message)
+{
+    DBusError error;
+    /* this packet format was designed before we split eph */
+    double eph;
+    struct gps_data_t gpsdata;
+
+    dbus_error_init(&error);
+
+    (void)memset(&gpsdata, '\0', sizeof(gpsdata));
+    dbus_message_get_args(message,
+			  &error,
+			  DBUS_TYPE_DOUBLE, &gpsdata.fix.time,
+			  DBUS_TYPE_INT32, &gpsdata.fix.mode,
+			  DBUS_TYPE_DOUBLE, &gpsdata.fix.ept,
+			  DBUS_TYPE_DOUBLE, &gpsdata.fix.latitude,
+			  DBUS_TYPE_DOUBLE, &gpsdata.fix.longitude,
+			  DBUS_TYPE_DOUBLE, &eph,
+			  DBUS_TYPE_DOUBLE, &gpsdata.fix.altitude,
+			  DBUS_TYPE_DOUBLE, &gpsdata.fix.epv,
+			  DBUS_TYPE_DOUBLE, &gpsdata.fix.track,
+			  DBUS_TYPE_DOUBLE, &gpsdata.fix.epd,
+			  DBUS_TYPE_DOUBLE, &gpsdata.fix.speed,
+			  DBUS_TYPE_DOUBLE, &gpsdata.fix.eps,
+			  DBUS_TYPE_DOUBLE, &gpsdata.fix.climb,
+			  DBUS_TYPE_DOUBLE, &gpsdata.fix.epc,
+			  DBUS_TYPE_STRING, &gpsd_devname, DBUS_TYPE_INVALID);
+
+    if (gpsdata.fix.mode > MODE_NO_FIX )
+	gpsdata.status = STATUS_FIX;
+    else
+	gpsdata.status = STATUS_NO_FIX;
+
+    PRIVATE(&gpsdata)->handler(&gpsdata);
+    return DBUS_HANDLER_RESULT_HANDLED;
+}
+
+/*
+ * Message dispatching function
+ *
+ */
+static DBusHandlerResult signal_handler(DBusConnection * connection,
+					DBusMessage * message)
+{
+    /* dummy, need to use the variable for some reason */
+    connection = NULL;
+
+    if (dbus_message_is_signal(message, "org.gpsd", "fix"))
+	return handle_gps_fix(message);
+    /*
+     * ignore all other messages
+     */
+
+    return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
+}
+
+int gps_dbus_open(void (*handler)(struct gps_data_t *), struct gps_data_t *gpsdata)
+{
+    GMainLoop *mainloop;
+    DBusError error;
+
+    /* set up for line-buffered I/O over the daemon socket */
+    gpsdata->privdata = (void *)malloc(sizeof(struct privdata_t));
+    if (gpsdata->privdata == NULL)
+	return -1;
+    PRIVATE(gpsdata)->handler = handler;
+
+    mainloop = g_main_loop_new(NULL, FALSE);
+
+    dbus_error_init(&error);
+    connection = dbus_bus_get(DBUS_BUS_SYSTEM, &error);
+    if (dbus_error_is_set(&error)) {
+	syslog(LOG_CRIT, "%s: %s", error.name, error.message);
+	return 3;
+    }
+
+    dbus_bus_add_match(connection, "type='signal'", &error);
+    if (dbus_error_is_set(&error)) {
+	syslog(LOG_CRIT, "unable to add match for signals %s: %s", error.name,
+	       error.message);
+	return 4;
+    }
+
+    if (!dbus_connection_add_filter
+	(connection, (DBusHandleMessageFunction) signal_handler, NULL,
+	 NULL)) {
+	syslog(LOG_CRIT, "unable to register filter with the connection");
+	return 5;
+    }
+
+    dbus_connection_setup_with_g_main(connection, NULL);
+
+    g_main_loop_run(mainloop);
+    return 0;
+}
+
+#endif /* defined(DBUS_EXPORT_ENABLE) && !defined(S_SPLINT_S) */
-- 
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