fprintd/utils/delete.c

/*
 * fprintd example to delete fingerprints
 * Copyright (C) 2008 Daniel Drake <dsd@gentoo.org>
 * Copyright (C) 2020 Marco Trevisan <marco.trevisan@canonical.com>
 *
 * 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 <stdio.h>
#include <stdlib.h>
#include <locale.h>
#include "fprintd-dbus.h"

static FprintDBusManager *manager = NULL;
static GDBusConnection *connection = NULL;

static void create_manager(void)
{
	GError *error = NULL;

	connection = g_bus_get_sync (G_BUS_TYPE_SYSTEM, NULL, &error);
	if (connection == NULL) {
		g_print("Failed to connect to session bus: %s\n", error->message);
		exit (1);
	}

	manager = fprint_dbus_manager_proxy_new_sync (connection,
						      G_DBUS_PROXY_FLAGS_NONE,
						      "net.reactivated.Fprint",
						      "/net/reactivated/Fprint/Manager",
						      NULL, &error);
	if (manager == NULL) {
		g_print ("Failed to get Fprintd manager: %s\n", error->message);
		exit (1);
	}
}

static void delete_fingerprints (FprintDBusDevice *dev, const char *username)
{
	GError *error = NULL;

	if (!fprint_dbus_device_call_claim_sync (dev, username, NULL, &error)) {
		g_print("failed to claim device: %s\n", error->message);
		exit (1);
	}

	if (!fprint_dbus_device_call_delete_enrolled_fingers2_sync (dev, NULL,
								    &error)) {
		gboolean ignore_error = FALSE;
		if (g_dbus_error_is_remote_error (error)) {
			g_autofree char *dbus_error =
				g_dbus_error_get_remote_error (error);
			if (g_str_equal (dbus_error,
					 "net.reactivated.Fprint.Error.NoEnrolledPrints")) {
				g_print ("No fingerprints to delete on %s\n",
					 fprint_dbus_device_get_name (dev));
				ignore_error = TRUE;
			}
		}
		if (!ignore_error) {
			g_print("ListEnrolledFingers failed: %s\n",
				error->message);
			exit (1);
		} else {
			g_print ("No fingerprints to delete on %s\n",
				 fprint_dbus_device_get_name (dev));
			g_clear_error (&error);
		}
	} else {
			g_print ("Fingerprints deleted on %s\n",
				 fprint_dbus_device_get_name (dev));
	}

	if (!fprint_dbus_device_call_release_sync (dev, NULL, &error)) {
		g_print("ReleaseDevice failed: %s\n", error->message);
		exit (1);
	}
}

static void process_devices(char **argv)
{
	GError *error = NULL;
	g_auto(GStrv) devices = NULL;
	char *path;
	guint num_devices;
	guint i;

	if (!fprint_dbus_manager_call_get_devices_sync (manager, &devices,
							NULL, &error)) {
		g_print("Impossible to get devices: %s\n", error->message);
		exit (1);
	}

	num_devices = g_strv_length (devices);
	if (num_devices == 0) {
		g_print("No devices available\n");
		exit(1);
	}

	g_print ("found %u devices\n", num_devices);
	for (i = 0; devices[i] != NULL; i++) {
		path = devices[i];
		g_print("Device at %s\n", path);
	}

	for (i = 0; devices[i] != NULL; i++) {
		g_autoptr(FprintDBusDevice) dev = NULL;
		guint j;

		path = devices[i];
		g_print("Using device %s\n", path);

		dev = fprint_dbus_device_proxy_new_sync (connection,
							 G_DBUS_PROXY_FLAGS_NONE,
							 "net.reactivated.Fprint",
							 path, NULL, &error);

		for (j = 1; argv[j] != NULL; j++)
			delete_fingerprints (dev, argv[j]);
	}
}

int main(int argc, char **argv)
{
	setlocale (LC_ALL, "");

	create_manager();

	if (argc < 2) {
		g_print ("Usage: %s <username> [usernames...]\n", argv[0]);
		return 1;
	}

	process_devices (argv);

	return 0;
}