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#include <gio/gio.h>
#include <stdlib.h>
#include <stdio.h>
#include <config.h>
#include <glib.h>
#include "gtop-dbus-service.h"
// required for renice
#include <sys/time.h>
#include <sys/resource.h>
#include <errno.h>
static const gchar object_name[] = "/org/gnome/gtopServer";
static const gchar processes_object_name[] = "/org/gnome/gtopServer/Processes";
#define VERBOSE 1
/* ---------------------------------------------------------------------------------------------------- */
static GDBusNodeInfo *introspection_data = NULL;
/* Introspection data for the service we are exporting */
static const gchar introspection_xml[] =
"<node name='/org/gnome/gtopServer'>"
" <interface name='org.gnome.gtop'>"
" <property type='s' name='Version' access='read'/>"
" </interface>"
" <interface name='org.gnome.gtop.Processes'>"
" <method name='SendSignal'>"
" <arg name='pid' type='i' direction='in' />"
" <arg name='signal' type='i' direction='in' />"
" </method>"
" <method name='Renice'>"
" <arg name='pid' type='i' direction='in' />"
" <arg name='nice' type='i' direction='in' />"
" </method>"
" <method name='GetProperties'>"
" <arg name='pid' type='i' direction='in' />"
" <arg name='propertyList' type='as' direction='in' />"
" <arg name='properties' type='a{sv}' direction='out' />"
" </method>"
" </interface>"
"</node>";
/**
* Handle a call to a method. (Parameters should be obvious.)
*/
static void
handle_method_call (GDBusConnection *connection,
const gchar *sender,
const gchar *object_path,
const gchar *interface_name,
const gchar *method_name,
GVariant *parameters,
GDBusMethodInvocation *invocation,
gpointer user_data)
{
#ifdef VERBOSE
gchar *paramstr = g_variant_print (parameters, TRUE);
fprintf (stderr, MSG_PREFIX
"handle_method_call (%p,\"%s\",\"%s\",\"%s\",\"%s\",\"%s\",(invocation),%p)\n",
connection, sender, object_path, interface_name, method_name,
paramstr, user_data);
g_free (paramstr);
#endif
if (g_strcmp0 (method_name, "Renice") == 0)
{
int pid, prio;
g_variant_get (parameters, "(ii)", &pid, &prio);
gint renice_result = setpriority (PRIO_PROCESS, pid, CLAMP(prio, PRIO_MIN, PRIO_MAX));
#ifdef VERBOSE
fprintf (stderr, MSG_PREFIX"renicing '%d' to '%d' priority returned %d", pid, prio, renice_result);
#endif
if (renice_result == 0)
g_dbus_method_invocation_return_value (invocation, NULL);
else {
switch (errno) {
case ESRCH: g_dbus_method_invocation_return_error (invocation,
G_IO_ERROR,
G_IO_ERROR_NOT_FOUND,
MSG_PREFIX "Process '%d' not found",
pid);
break;
case EACCES:
case EPERM: g_dbus_method_invocation_return_error (invocation,
G_IO_ERROR,
G_IO_ERROR_PERMISSION_DENIED,
MSG_PREFIX "Permission denied to change priority of process '%d' to '%d'",
pid, prio);
break;
}
}
}
// Anything else is an error.
else
{
// Default: No such method
g_dbus_method_invocation_return_error (invocation,
G_IO_ERROR,
G_IO_ERROR_INVALID_ARGUMENT,
MSG_PREFIX "Invalid method: '%s' on '%s'",
method_name, interface_name);
}
} // handle_method_call
/**
* Handle a request to set a property.
*/
static gboolean
handle_set_property (GDBusConnection *connection,
const gchar *sender,
const gchar *object_path,
const gchar *interface_name,
const gchar *property_name,
GVariant *value,
GError **error,
gpointer user_data)
{
// Print an optional log message
#ifdef VERBOSE
gchar *valstr = g_variant_print (value, TRUE);
fprintf (stderr, MSG_PREFIX
"handle_set_property (%p,\"%s\",\"%s\",\"%s\",\"%s\",\"%s\",(error),%p)\n",
connection, sender, object_path, interface_name, property_name,
valstr, user_data);
g_free (valstr);
#endif
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_FAILED,
MSG_PREFIX "No such property: '%s'",
property_name);
return 0;
} // handle_set_property
/**
* Handle a request for a property. (Parameters should be obvious.)
*/
static GVariant *
handle_get_property (GDBusConnection *connection,
const gchar *sender,
const gchar *object_path,
const gchar *interface_name,
const gchar *property_name,
GError **error,
gpointer user_data)
{
// Print an optional log message
#ifdef VERBOSE
fprintf (stderr, MSG_PREFIX
"handle_get_property (%p,\"%s\",\"%s\",\"%s\",\"%s\",(error),%p)\n",
connection, sender, object_path, interface_name, property_name,
user_data);
#endif
if (g_strcmp0 (property_name, "Version") == 0)
{
return g_variant_new_string (LIBGTOP_VERSION);
}
// Anything else is an error.
else
{
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_FAILED,
MSG_PREFIX "Invalid property '%s'",
property_name);
return NULL;
} // unknown property
} // handle_get_property
/**
* What to do when the bus gets acquired.
*/
static void
on_bus_acquired (GDBusConnection *connection,
const gchar *name,
gpointer user_data)
{
static GDBusInterfaceVTable interface_vtable =
{
handle_method_call,
handle_get_property,
handle_set_property
};
guint registration_id;
GError *error = NULL;
// A bit of (optional) notification
#ifdef VERBOSE
fprintf (stderr, MSG_PREFIX "on_bus_acquired (%p, \"%s\", %p)\n",
connection, name, user_data);
#endif
registration_id =
g_dbus_connection_register_object (connection,
object_name,
introspection_data->interfaces[0],
&interface_vtable,
NULL, // Optional user data
NULL, // Func. for freeing user data
&error);
registration_id =
g_dbus_connection_register_object (connection,
processes_object_name,
introspection_data->interfaces[1],
&interface_vtable,
NULL, // Optional user data
NULL, // Func. for freeing user data
&error);
} // on_bus_acquired
static void
on_name_acquired (GDBusConnection *connection,
const gchar *name,
gpointer user_data)
{
// A bit of (optional) notification
#ifdef VERBOSE
fprintf (stderr, MSG_PREFIX "on_name_acquired (%p, \"%s\", %p)\n",
connection, name, user_data);
#endif
} // on_name_acquired
static void
on_name_lost (GDBusConnection *connection,
const gchar *name,
gpointer user_data)
{
// A bit of (optional) notification
#ifdef VERBOSE
fprintf (stderr, MSG_PREFIX "on_name_lost (%p, \"%s\", %p)\n",
connection, name, user_data);
#endif
// Things seem to have gone badly wrong, so give up
exit (1);
} // on_name_lost
int main ( int argc, char ** argv ) {
guint owner_id;
GMainLoop *loop;
introspection_data = g_dbus_node_info_new_for_xml (introspection_xml, NULL);
owner_id = g_bus_own_name (G_BUS_TYPE_SESSION,
GTOP_SERVER,
G_BUS_NAME_OWNER_FLAGS_NONE,
on_bus_acquired,
on_name_acquired,
on_name_lost,
NULL,
NULL);
loop = g_main_loop_new (NULL, FALSE);
g_main_loop_run (loop);
// Tell the bus that we're done with the name
g_bus_unown_name (owner_id);
// Clean up after ourselves
g_dbus_node_info_unref (introspection_data);
return 0;
}
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