src/fu-tool.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
 *
 * Copyright (C) 2015-2018 Richard Hughes <richard@hughsie.com>
 *
 * Licensed under the GNU General Public License Version 2
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "config.h"

#include <fwupd.h>
#include <glib/gi18n.h>
#include <glib-unix.h>
#include <locale.h>
#include <stdlib.h>
#include <unistd.h>

#include "fu-engine.h"
#include "fu-progressbar.h"
#include "fu-smbios.h"
#include "fu-util-common.h"

/* this is only valid in this file */
#define FWUPD_ERROR_INVALID_ARGS	(FWUPD_ERROR_LAST+1)

/* custom return code */
#define EXIT_NOTHING_TO_DO		2

typedef struct {
	GCancellable		*cancellable;
	GMainLoop		*loop;
	GOptionContext		*context;
	GPtrArray		*cmd_array;
	FuEngine		*engine;
	FuProgressbar		*progressbar;
	FwupdInstallFlags	 flags;
	gboolean		 show_all_devices;
} FuUtilPrivate;

typedef gboolean (*FuUtilPrivateCb)	(FuUtilPrivate	*util,
					 gchar		**values,
					 GError		**error);

typedef struct {
	gchar		*name;
	gchar		*arguments;
	gchar		*description;
	FuUtilPrivateCb	 callback;
} FuUtilItem;

static void
fu_util_item_free (FuUtilItem *item)
{
	g_free (item->name);
	g_free (item->arguments);
	g_free (item->description);
	g_free (item);
}

static gint
fu_sort_command_name_cb (FuUtilItem **item1, FuUtilItem **item2)
{
	return g_strcmp0 ((*item1)->name, (*item2)->name);
}

static void
fu_util_add (GPtrArray *array,
	     const gchar *name,
	     const gchar *arguments,
	     const gchar *description,
	     FuUtilPrivateCb callback)
{
	g_auto(GStrv) names = NULL;

	g_return_if_fail (name != NULL);
	g_return_if_fail (description != NULL);
	g_return_if_fail (callback != NULL);

	/* add each one */
	names = g_strsplit (name, ",", -1);
	for (guint i = 0; names[i] != NULL; i++) {
		FuUtilItem *item = g_new0 (FuUtilItem, 1);
		item->name = g_strdup (names[i]);
		if (i == 0) {
			item->description = g_strdup (description);
		} else {
			/* TRANSLATORS: this is a command alias, e.g. 'get-devices' */
			item->description = g_strdup_printf (_("Alias to %s"),
							     names[0]);
		}
		item->arguments = g_strdup (arguments);
		item->callback = callback;
		g_ptr_array_add (array, item);
	}
}

static gchar *
fu_util_get_descriptions (GPtrArray *array)
{
	gsize len;
	const gsize max_len = 35;
	GString *string;

	/* print each command */
	string = g_string_new ("");
	for (guint i = 0; i < array->len; i++) {
		FuUtilItem *item = g_ptr_array_index (array, i);
		g_string_append (string, "  ");
		g_string_append (string, item->name);
		len = strlen (item->name) + 2;
		if (item->arguments != NULL) {
			g_string_append (string, " ");
			g_string_append (string, item->arguments);
			len += strlen (item->arguments) + 1;
		}
		if (len < max_len) {
			for (gsize j = len; j < max_len + 1; j++)
				g_string_append_c (string, ' ');
			g_string_append (string, item->description);
			g_string_append_c (string, '\n');
		} else {
			g_string_append_c (string, '\n');
			for (gsize j = 0; j < max_len + 1; j++)
				g_string_append_c (string, ' ');
			g_string_append (string, item->description);
			g_string_append_c (string, '\n');
		}
	}

	/* remove trailing newline */
	if (string->len > 0)
		g_string_set_size (string, string->len - 1);

	return g_string_free (string, FALSE);
}

static gboolean
fu_util_run (FuUtilPrivate *priv, const gchar *command, gchar **values, GError **error)
{
	/* find command */
	for (guint i = 0; i < priv->cmd_array->len; i++) {
		FuUtilItem *item = g_ptr_array_index (priv->cmd_array, i);
		if (g_strcmp0 (item->name, command) == 0)
			return item->callback (priv, values, error);
	}

	/* not found */
	g_set_error_literal (error,
			     FWUPD_ERROR,
			     FWUPD_ERROR_INVALID_ARGS,
			     /* TRANSLATORS: error message */
			     _("Command not found"));
	return FALSE;
}

static void
fu_util_cancelled_cb (GCancellable *cancellable, gpointer user_data)
{
	FuUtilPrivate *priv = (FuUtilPrivate *) user_data;
	/* TRANSLATORS: this is when a device ctrl+c's a watch */
	g_print ("%s\n", _("Cancelled"));
	g_main_loop_quit (priv->loop);
}

static gboolean
fu_util_smbios_dump (FuUtilPrivate *priv, gchar **values, GError **error)
{
	g_autofree gchar *tmp = NULL;
	g_autoptr(FuSmbios) smbios = NULL;
	if (g_strv_length (values) < 1) {
		g_set_error_literal (error,
				     FWUPD_ERROR,
				     FWUPD_ERROR_INVALID_ARGS,
				     "Invalid arguments");
		return FALSE;
	}
	smbios = fu_smbios_new ();
	if (!fu_smbios_setup_from_file (smbios, values[0], error))
		return FALSE;
	tmp = fu_smbios_to_string (smbios);
	g_print ("%s\n", tmp);
	return TRUE;
}

static void
fu_util_ignore_cb (const gchar *log_domain, GLogLevelFlags log_level,
		   const gchar *message, gpointer user_data)
{
}

static gboolean
fu_util_sigint_cb (gpointer user_data)
{
	FuUtilPrivate *priv = (FuUtilPrivate *) user_data;
	g_debug ("Handling SIGINT");
	g_cancellable_cancel (priv->cancellable);
	return FALSE;
}

static void
fu_util_private_free (FuUtilPrivate *priv)
{
	if (priv->cmd_array != NULL)
		g_ptr_array_unref (priv->cmd_array);
	if (priv->engine != NULL)
		g_object_unref (priv->engine);
	if (priv->loop != NULL)
		g_main_loop_unref (priv->loop);
	if (priv->cancellable != NULL)
		g_object_unref (priv->cancellable);
	if (priv->progressbar != NULL)
		g_object_unref (priv->progressbar);
	if (priv->context != NULL)
		g_option_context_free (priv->context);
	g_free (priv);
}

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wunused-function"
G_DEFINE_AUTOPTR_CLEANUP_FUNC(FuUtilPrivate, fu_util_private_free)
#pragma clang diagnostic pop


static void
fu_main_engine_device_added_cb (FuEngine *engine,
				FuDevice *device,
				FuUtilPrivate *priv)
{
	g_autofree gchar *tmp = fu_device_to_string (device);
	g_debug ("ADDED:\n%s", tmp);
}

static void
fu_main_engine_device_removed_cb (FuEngine *engine,
				  FuDevice *device,
				  FuUtilPrivate *priv)
{
	g_autofree gchar *tmp = fu_device_to_string (device);
	g_debug ("REMOVED:\n%s", tmp);
}

static void
fu_main_engine_device_changed_cb (FuEngine *engine,
				  FuDevice *device,
				  FuUtilPrivate *priv)
{
	g_autofree gchar *tmp = fu_device_to_string (device);
	g_debug ("CHANGED:\n%s", tmp);
}

static void
fu_main_engine_status_changed_cb (FuEngine *engine,
				  FwupdStatus status,
				  FuUtilPrivate *priv)
{
	fu_progressbar_update (priv->progressbar, status, 0);
}

static void
fu_main_engine_percentage_changed_cb (FuEngine *engine,
				      guint percentage,
				      FuUtilPrivate *priv)
{
	fu_progressbar_update (priv->progressbar, FWUPD_STATUS_UNKNOWN, percentage);
}

static gboolean
fu_util_watch (FuUtilPrivate *priv, gchar **values, GError **error)
{
	if (!fu_engine_load (priv->engine, error))
		return FALSE;
	g_main_loop_run (priv->loop);
	return TRUE;
}

static gboolean
fu_util_get_devices (FuUtilPrivate *priv, gchar **values, GError **error)
{
	g_autoptr(GPtrArray) devs = NULL;

	/* load engine */
	if (!fu_engine_load (priv->engine, error))
		return FALSE;

	/* print */
	devs = fu_engine_get_devices (priv->engine, error);
	if (devs == NULL)
		return FALSE;
	if (devs->len == 0) {
		/* TRANSLATORS: nothing attached */
		g_print ("%s\n", _("No hardware detected with firmware update capability"));
		return TRUE;
	}
	for (guint i = 0; i < devs->len; i++) {
		g_autofree gchar *tmp = NULL;
		FwupdDevice *dev = g_ptr_array_index (devs, i);
		if (!(fwupd_device_has_flag (dev, FWUPD_DEVICE_FLAG_UPDATABLE) || priv->show_all_devices))
			continue;
		tmp = fwupd_device_to_string (dev);
		g_print ("%s\n", tmp);
	}

	return TRUE;
}

static void
fu_util_build_device_tree (FuUtilPrivate *priv, GNode *root, GPtrArray *devs, FwupdDevice *dev)
{
	for (guint i = 0; i < devs->len; i++) {
		FwupdDevice *dev_tmp = g_ptr_array_index (devs, i);
		if (!(fwupd_device_has_flag (dev_tmp, FWUPD_DEVICE_FLAG_UPDATABLE) || priv->show_all_devices))
			continue;
		if (fwupd_device_get_parent (dev_tmp) == dev) {
			GNode *child = g_node_append_data (root, dev_tmp);
			fu_util_build_device_tree (priv, child, devs, dev_tmp);
		}
	}
}

static gboolean
fu_util_get_topology (FuUtilPrivate *priv, gchar **values, GError **error)
{
	g_autoptr(GNode) root = g_node_new (NULL);
	g_autoptr(GPtrArray) devs = NULL;

	/* load engine */
	if (!fu_engine_load (priv->engine, error))
		return FALSE;

	/* print */
	devs = fu_engine_get_devices (priv->engine, error);
	if (devs == NULL)
		return FALSE;

	/* print */
	if (devs->len == 0) {
		/* TRANSLATORS: nothing attached that can be upgraded */
		g_print ("%s\n", _("No hardware detected with firmware update capability"));
		return TRUE;
	}
	fu_util_build_device_tree (priv, root, devs, NULL);
	g_node_traverse (root, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
			 fu_util_print_device_tree, priv);

	return TRUE;
}


static FuDevice *
fu_util_prompt_for_device (FuUtilPrivate *priv, GError **error)
{
	FuDevice *dev;
	guint idx;
	g_autoptr(GPtrArray) devices = NULL;

	/* get devices from daemon */
	devices = fu_engine_get_devices (priv->engine, error);
	if (devices == NULL)
		return NULL;

	/* exactly one */
	if (devices->len == 1) {
		dev = g_ptr_array_index (devices, 0);
		return g_object_ref (dev);
	}

	/* TRANSLATORS: get interactive prompt */
	g_print ("%s\n", _("Choose a device:"));
	/* TRANSLATORS: this is to abort the interactive prompt */
	g_print ("0.\t%s\n", _("Cancel"));
	for (guint i = 0; i < devices->len; i++) {
		dev = g_ptr_array_index (devices, i);
		g_print ("%u.\t%s (%s)\n",
			 i + 1,
			 fu_device_get_id (dev),
			 fu_device_get_name (dev));
	}
	idx = fu_util_prompt_for_number (devices->len);
	if (idx == 0) {
		g_set_error_literal (error,
				     FWUPD_ERROR,
				     FWUPD_ERROR_NOTHING_TO_DO,
				     "Request canceled");
		return NULL;
	}
	dev = g_ptr_array_index (devices, idx - 1);
	return g_object_ref (dev);
}

static gboolean
fu_util_install_blob (FuUtilPrivate *priv, gchar **values, GError **error)
{
	g_autoptr(FuDevice) device = NULL;
	g_autoptr(GBytes) blob_fw = NULL;

	/* invalid args */
	if (g_strv_length (values) == 0) {
		g_set_error_literal (error,
				     FWUPD_ERROR,
				     FWUPD_ERROR_INVALID_ARGS,
				     "Invalid arguments");
		return FALSE;
	}

	/* parse blob */
	blob_fw = fu_common_get_contents_bytes (values[0], error);
	if (blob_fw == NULL)
		return FALSE;

	/* load engine */
	if (!fu_engine_load (priv->engine, error))
		return FALSE;

	/* get device */
	if (g_strv_length (values) >= 2) {
		device = fu_engine_get_device (priv->engine, values[1], error);
		if (device == NULL)
			return FALSE;
	} else {
		device = fu_util_prompt_for_device (priv, error);
		if (device == NULL)
			return FALSE;
	}

	/* write bare firmware */
	return fu_engine_install_blob (priv->engine, device,
				       NULL, /* blob_cab */
				       blob_fw,
				       NULL, /* version */
				       priv->flags,
				       error);
}

static gint
fu_util_install_task_sort_cb (gconstpointer a, gconstpointer b)
{
	FuInstallTask *task1 = *((FuInstallTask **) a);
	FuInstallTask *task2 = *((FuInstallTask **) b);
	return fu_install_task_compare (task1, task2);
}

static gboolean
fu_util_install (FuUtilPrivate *priv, gchar **values, GError **error)
{
	GPtrArray *apps;
	g_autoptr(AsStore) store = NULL;
	g_autoptr(GBytes) blob_cab = NULL;
	g_autoptr(GPtrArray) devices_possible = NULL;
	g_autoptr(GPtrArray) errors = NULL;
	g_autoptr(GPtrArray) install_tasks = NULL;

	/* handle both forms */
	if (g_strv_length (values) == 1) {
		devices_possible = fu_engine_get_devices (priv->engine, error);
		if (devices_possible == NULL)
			return FALSE;
	} else if (g_strv_length (values) == 2) {
		FuDevice *device = fu_engine_get_device (priv->engine,
							 values[1],
							 error);
		if (device == NULL)
			return FALSE;
		devices_possible = g_ptr_array_new_with_free_func ((GDestroyNotify) g_object_unref);
		g_ptr_array_add (devices_possible, device);
	} else {
		g_set_error_literal (error,
				     FWUPD_ERROR,
				     FWUPD_ERROR_INVALID_ARGS,
				     "Invalid arguments");
		return FALSE;
	}

	/* parse store */
	blob_cab = fu_common_get_contents_bytes (values[0], error);
	if (blob_cab == NULL)
		return FALSE;
	store = fu_engine_get_store_from_blob (priv->engine, blob_cab, error);
	if (store == NULL)
		return FALSE;
	apps = as_store_get_apps (store);

	/* for each component in the store */
	errors = g_ptr_array_new_with_free_func ((GDestroyNotify) g_error_free);
	install_tasks = g_ptr_array_new_with_free_func ((GDestroyNotify) g_object_unref);
	for (guint i = 0; i < apps->len; i++) {
		AsApp *app = g_ptr_array_index (apps, i);

		/* do any devices pass the requirements */
		for (guint j = 0; j < devices_possible->len; j++) {
			FuDevice *device = g_ptr_array_index (devices_possible, j);
			g_autoptr(FuInstallTask) task = NULL;
			g_autoptr(GError) error_local = NULL;

			/* is this component valid for the device */
			task = fu_install_task_new (device, app);
			if (!fu_engine_check_requirements (priv->engine,
							   task, priv->flags,
							   &error_local)) {
				g_debug ("requirement on %s:%s failed: %s",
					 fu_device_get_id (device),
					 as_app_get_id (app),
					 error_local->message);
				g_ptr_array_add (errors, g_steal_pointer (&error_local));
				continue;
			}

			/* success */
			g_ptr_array_add (install_tasks, g_steal_pointer (&task));
		}
	}

	/* order the install tasks by the device priority */
	g_ptr_array_sort (install_tasks, fu_util_install_task_sort_cb);

	/* nothing suitable */
	if (install_tasks->len == 0) {
		GError *error_tmp = fu_common_error_array_get_best (errors);
		g_propagate_error (error, error_tmp);
		return FALSE;
	}

	/* install all the tasks */
	for (guint i = 0; i < install_tasks->len; i++) {
		FuInstallTask *task = g_ptr_array_index (install_tasks, i);
		if (!fu_engine_install (priv->engine, task, blob_cab, priv->flags, error))
			return FALSE;
	}

	/* success */
	return TRUE;
}

static gboolean
fu_util_detach (FuUtilPrivate *priv, gchar **values, GError **error)
{
	g_autoptr(FuDevice) device = NULL;

	/* load engine */
	if (!fu_engine_load (priv->engine, error))
		return FALSE;

	/* invalid args */
	if (g_strv_length (values) == 0) {
		g_set_error_literal (error,
				     FWUPD_ERROR,
				     FWUPD_ERROR_INVALID_ARGS,
				     "Invalid arguments");
		return FALSE;
	}

	/* get device */
	if (g_strv_length (values) >= 1) {
		device = fu_engine_get_device (priv->engine, values[0], error);
		if (device == NULL)
			return FALSE;
	} else {
		device = fu_util_prompt_for_device (priv, error);
		if (device == NULL)
			return FALSE;
	}

	/* run vfunc */
	return fu_device_detach (device, error);
}

static gboolean
fu_util_attach (FuUtilPrivate *priv, gchar **values, GError **error)
{
	g_autoptr(FuDevice) device = NULL;

	/* load engine */
	if (!fu_engine_load (priv->engine, error))
		return FALSE;

	/* invalid args */
	if (g_strv_length (values) == 0) {
		g_set_error_literal (error,
				     FWUPD_ERROR,
				     FWUPD_ERROR_INVALID_ARGS,
				     "Invalid arguments");
		return FALSE;
	}

	/* get device */
	if (g_strv_length (values) >= 1) {
		device = fu_engine_get_device (priv->engine, values[0], error);
		if (device == NULL)
			return FALSE;
	} else {
		device = fu_util_prompt_for_device (priv, error);
		if (device == NULL)
			return FALSE;
	}

	/* run vfunc */
	return fu_device_attach (device, error);
}

int
main (int argc, char *argv[])
{
	gboolean allow_older = FALSE;
	gboolean allow_reinstall = FALSE;
	gboolean force = FALSE;
	gboolean ret;
	gboolean verbose = FALSE;
	g_autoptr(FuUtilPrivate) priv = g_new0 (FuUtilPrivate, 1);
	g_autoptr(GError) error = NULL;
	g_autofree gchar *cmd_descriptions = NULL;
	const GOptionEntry options[] = {
		{ "verbose", 'v', 0, G_OPTION_ARG_NONE, &verbose,
			/* TRANSLATORS: command line option */
			_("Show extra debugging information"), NULL },
		{ "allow-reinstall", '\0', 0, G_OPTION_ARG_NONE, &allow_reinstall,
			/* TRANSLATORS: command line option */
			_("Allow re-installing existing firmware versions"), NULL },
		{ "allow-older", '\0', 0, G_OPTION_ARG_NONE, &allow_older,
			/* TRANSLATORS: command line option */
			_("Allow downgrading firmware versions"), NULL },
		{ "force", '\0', 0, G_OPTION_ARG_NONE, &force,
			/* TRANSLATORS: command line option */
			_("Override plugin warning"), NULL },
		{ "show-all-devices", '\0', 0, G_OPTION_ARG_NONE, &priv->show_all_devices,
			/* TRANSLATORS: command line option */
			_("Show devices that are not updatable"), NULL },
		{ NULL}
	};

	setlocale (LC_ALL, "");

	bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
	bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
	textdomain (GETTEXT_PACKAGE);

	/* ensure root user */
	if (getuid () != 0 || geteuid () != 0) {
		/* TRANSLATORS: we're poking around as a power user */
		g_print ("%s\n", _("This program can only be used when root"));
		return EXIT_FAILURE;
	}

	/* create helper object */
	priv->loop = g_main_loop_new (NULL, FALSE);
	priv->progressbar = fu_progressbar_new ();

	/* add commands */
	priv->cmd_array = g_ptr_array_new_with_free_func ((GDestroyNotify) fu_util_item_free);
	fu_util_add (priv->cmd_array,
		     "smbios-dump",
		     "FILE",
		     /* TRANSLATORS: command description */
		     _("Dump SMBIOS data from a file"),
		     fu_util_smbios_dump);
	fu_util_add (priv->cmd_array,
		     "get-devices",
		     NULL,
		     /* TRANSLATORS: command description */
		     _("Get all devices that support firmware updates"),
		     fu_util_get_devices);
	fu_util_add (priv->cmd_array,
		     "get-topology",
		     NULL,
		     /* TRANSLATORS: command description */
		     _("Get all devices according to the system topology"),
		     fu_util_get_topology);
	fu_util_add (priv->cmd_array,
		     "watch",
		     NULL,
		     /* TRANSLATORS: command description */
		     _("Watch for hardare changes"),
		     fu_util_watch);
	fu_util_add (priv->cmd_array,
		     "install-blob",
		     "FILENAME DEVICE-ID",
		     /* TRANSLATORS: command description */
		     _("Install a firmware blob on a device"),
		     fu_util_install_blob);
	fu_util_add (priv->cmd_array,
		     "install",
		     "FILE [ID]",
		     /* TRANSLATORS: command description */
		     _("Install a firmware file on this hardware"),
		     fu_util_install);
	fu_util_add (priv->cmd_array,
		     "attach",
		     "DEVICE-ID",
		     /* TRANSLATORS: command description */
		     _("Attach to firmware mode"),
		     fu_util_attach);
	fu_util_add (priv->cmd_array,
		     "detach",
		     "DEVICE-ID",
		     /* TRANSLATORS: command description */
		     _("Detach to bootloader mode"),
		     fu_util_detach);

	/* do stuff on ctrl+c */
	priv->cancellable = g_cancellable_new ();
	g_unix_signal_add_full (G_PRIORITY_DEFAULT,
				SIGINT, fu_util_sigint_cb,
				priv, NULL);
	g_signal_connect (priv->cancellable, "cancelled",
			  G_CALLBACK (fu_util_cancelled_cb), priv);

	/* sort by command name */
	g_ptr_array_sort (priv->cmd_array,
			  (GCompareFunc) fu_sort_command_name_cb);

	/* get a list of the commands */
	priv->context = g_option_context_new (NULL);
	cmd_descriptions = fu_util_get_descriptions (priv->cmd_array);
	g_option_context_set_summary (priv->context, cmd_descriptions);
	g_option_context_set_description (priv->context,
		"This tool allows an administrator to use the fwupd plugins "
		"without being installed on the host system.");

	/* TRANSLATORS: program name */
	g_set_application_name (_("Firmware Utility"));
	g_option_context_add_main_entries (priv->context, options, NULL);
	ret = g_option_context_parse (priv->context, &argc, &argv, &error);
	if (!ret) {
		/* TRANSLATORS: the user didn't read the man page */
		g_print ("%s: %s\n", _("Failed to parse arguments"),
			 error->message);
		return EXIT_FAILURE;
	}

	/* set verbose? */
	if (verbose) {
		g_setenv ("G_MESSAGES_DEBUG", "all", FALSE);
	} else {
		g_log_set_handler (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG,
				   fu_util_ignore_cb, NULL);
	}

	/* set flags */
	priv->flags |= FWUPD_INSTALL_FLAG_NO_HISTORY;
	if (allow_reinstall)
		priv->flags |= FWUPD_INSTALL_FLAG_ALLOW_REINSTALL;
	if (allow_older)
		priv->flags |= FWUPD_INSTALL_FLAG_ALLOW_OLDER;
	if (force)
		priv->flags |= FWUPD_INSTALL_FLAG_FORCE;

	/* load engine */
	priv->engine = fu_engine_new (FU_APP_FLAGS_NO_IDLE_SOURCES);
	g_signal_connect (priv->engine, "device-added",
			  G_CALLBACK (fu_main_engine_device_added_cb),
			  priv);
	g_signal_connect (priv->engine, "device-removed",
			  G_CALLBACK (fu_main_engine_device_removed_cb),
			  priv);
	g_signal_connect (priv->engine, "device-changed",
			  G_CALLBACK (fu_main_engine_device_changed_cb),
			  priv);
	g_signal_connect (priv->engine, "status-changed",
			  G_CALLBACK (fu_main_engine_status_changed_cb),
			  priv);
	g_signal_connect (priv->engine, "percentage-changed",
			  G_CALLBACK (fu_main_engine_percentage_changed_cb),
			  priv);

	/* run the specified command */
	ret = fu_util_run (priv, argv[1], (gchar**) &argv[2], &error);
	if (!ret) {
		if (g_error_matches (error, FWUPD_ERROR, FWUPD_ERROR_INVALID_ARGS)) {
			g_autofree gchar *tmp = NULL;
			tmp = g_option_context_get_help (priv->context, TRUE, NULL);
			g_print ("%s\n\n%s", error->message, tmp);
			return EXIT_FAILURE;
		}
		if (g_error_matches (error, FWUPD_ERROR, FWUPD_ERROR_NOTHING_TO_DO)) {
			g_print ("%s\n", error->message);
			return EXIT_NOTHING_TO_DO;
		}
		g_print ("%s\n", error->message);
		return EXIT_FAILURE;
	}

	/* success */
	return EXIT_SUCCESS;
}