examples: Add manage-prints test to list and delete prints
Simple example program to list prints in a device with own storage and that allow to delete them (by manual selection or full deletion).
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Marco Trevisan (Treviño)
Benjamin Berg
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ad920f9597
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d91ec2d044
1 changed files with 327 additions and 0 deletions
327
examples/manage-prints.c
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327
examples/manage-prints.c
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/*
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* Example fingerprint device prints listing and deletion
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* Enrolls your right index finger and saves the print to disk
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* Copyright (C) 2019 Marco Trevisan <marco.trevisan@canonical.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdio.h>
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#include <libfprint/fprint.h>
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typedef struct _ListData
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{
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GMainLoop *loop;
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int ret_value;
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GList *to_delete;
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gboolean any_failed;
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} ListData;
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static void
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list_data_free (ListData *list_data)
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{
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g_list_free_full (list_data->to_delete, g_object_unref);
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g_main_loop_unref (list_data->loop);
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g_free (list_data);
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}
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G_DEFINE_AUTOPTR_CLEANUP_FUNC (ListData, list_data_free)
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FpDevice *discover_device (GPtrArray * devices)
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{
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FpDevice *dev;
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if (!devices->len)
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return NULL;
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dev = g_ptr_array_index (devices, 0);
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g_print ("Found device claimed by %s driver\n", fp_device_get_driver (dev));
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return dev;
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}
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static void
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on_device_closed (FpDevice *dev,
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GAsyncResult *res,
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gpointer user_data)
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{
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ListData *list_data = user_data;
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g_autoptr(GError) error = NULL;
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fp_device_close_finish (dev, res, &error);
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if (error)
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g_warning ("Failed closing device %s\n", error->message);
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g_main_loop_quit (list_data->loop);
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}
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const char *
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finger_to_string (FpFinger finger)
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{
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switch (finger)
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{
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case FP_FINGER_LEFT_THUMB:
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return "left thumb";
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case FP_FINGER_LEFT_INDEX:
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return "left index";
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case FP_FINGER_LEFT_MIDDLE:
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return "left middle";
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case FP_FINGER_LEFT_RING:
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return "left ring";
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case FP_FINGER_LEFT_LITTLE:
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return "left little";
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case FP_FINGER_RIGHT_THUMB:
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return "right thumb";
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case FP_FINGER_RIGHT_INDEX:
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return "right index";
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case FP_FINGER_RIGHT_MIDDLE:
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return "right middle";
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case FP_FINGER_RIGHT_RING:
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return "right ring";
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case FP_FINGER_RIGHT_LITTLE:
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return "right little";
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default:
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return "unknown";
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}
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}
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typedef struct _DeleteData
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{
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ListData *list_data;
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FpPrint *print;
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} DeleteData;
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static void
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delete_data_free (DeleteData *delete_data)
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{
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g_object_unref (delete_data->print);
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g_free (delete_data);
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}
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G_DEFINE_AUTOPTR_CLEANUP_FUNC (DeleteData, delete_data_free);
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static void
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on_print_deleted (FpDevice *dev, GAsyncResult *res, gpointer user_data);
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static void
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delete_next_print (FpDevice *dev,
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ListData *list_data)
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{
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FpPrint *print;
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g_assert_nonnull (list_data->to_delete);
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print = list_data->to_delete->data;
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g_debug ("Deleting print %s\n", fp_print_get_description (print));
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fp_device_delete_print (dev, print, NULL,
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(GAsyncReadyCallback) on_print_deleted, list_data);
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}
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static void
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on_print_deleted (FpDevice *dev,
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GAsyncResult *res,
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gpointer user_data)
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{
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ListData *list_data = user_data;
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g_autoptr(GError) error = NULL;
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g_autoptr(FpPrint) print = NULL;
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GList *deleted_link;
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fp_device_delete_print_finish (dev, res, &error);
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deleted_link = list_data->to_delete;
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print = g_steal_pointer (&deleted_link->data);
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list_data->to_delete = g_list_delete_link (list_data->to_delete, deleted_link);
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if (error)
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{
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g_warning("Failed to remove print %s: %s",
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fp_print_get_description (print), error->message);
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list_data->any_failed = TRUE;
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}
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else
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g_debug ("Deleted print %s from device", fp_print_get_description (print));
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if (list_data->to_delete != NULL)
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{
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delete_next_print (dev, list_data);
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}
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else
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{
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if (!list_data->any_failed)
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list_data->ret_value = EXIT_SUCCESS;
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fp_device_close (dev, NULL, (GAsyncReadyCallback) on_device_closed,
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list_data);
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}
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}
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static void
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on_list_completed (FpDevice *dev,
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GAsyncResult *res,
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gpointer user_data)
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{
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ListData *list_data = user_data;
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g_autoptr(GPtrArray) prints = NULL;
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g_autoptr(GError) error = NULL;
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prints = fp_device_list_prints_finish (dev, res, &error);
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if (!error)
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{
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guint i;
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char buf[128];
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g_print ("Device contains %u prints\n", prints->len);
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for (i = 0; i < prints->len; ++i)
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{
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FpPrint* print = prints->pdata[i];
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g_date_strftime (buf, G_N_ELEMENTS (buf), "%Y-%m-%d",
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fp_print_get_enroll_date (print));
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g_print ("[%d] Print of %s finger for username %s, enrolled "
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"on %s. Description: %s\n", i + 1,
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finger_to_string (fp_print_get_finger (print)),
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fp_print_get_username (print), buf,
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fp_print_get_description (print));
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}
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if (prints->len)
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{
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gint64 idx = 0;
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g_print ("Want to delete saved print? [<number>/A/n]\n");
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if (fgets (buf, 3, stdin))
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idx = g_ascii_strtoll (buf, NULL, 10);
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if (idx > 0 && idx <= prints->len)
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{
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FpPrint *print = prints->pdata[idx - 1];
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list_data->to_delete = g_list_prepend (list_data->to_delete,
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g_object_ref (print));
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}
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else if (buf[0] == 'A')
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{
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for (i = 0; i < prints->len; ++i)
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{
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FpPrint *print = prints->pdata[i];
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list_data->to_delete = g_list_prepend (list_data->to_delete,
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g_object_ref (print));
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}
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}
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else
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{
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if (buf[0] == 'n' || buf[0] == 'N')
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list_data->ret_value = EXIT_SUCCESS;
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else
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g_warning ("Invalid finger selected");
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fp_device_close (dev, NULL, (GAsyncReadyCallback) on_device_closed,
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list_data);
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}
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}
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if (list_data->to_delete)
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delete_next_print (dev, list_data);
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else
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{
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fp_device_close (dev, NULL, (GAsyncReadyCallback) on_device_closed,
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list_data);
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}
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}
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else
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{
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g_warning ("Getting prints failed with error %s", error->message);
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g_main_loop_quit (list_data->loop);
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}
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}
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static void
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on_device_opened (FpDevice *dev,
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GAsyncResult *res,
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gpointer user_data)
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{
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ListData *list_data = user_data;
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g_autoptr(GError) error = NULL;
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if (!fp_device_open_finish (dev, res, &error))
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{
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g_warning ("Failed to open device: %s", error->message);
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g_main_loop_quit (list_data->loop);
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return;
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}
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if (!fp_device_has_storage (dev))
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{
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g_warning ("Device %s doesn't support storage", fp_device_get_name (dev));
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g_main_loop_quit (list_data->loop);
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return;
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}
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fp_device_list_prints (dev, NULL,
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(GAsyncReadyCallback) on_list_completed, list_data);
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}
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int
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main (void)
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{
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g_autoptr(FpContext) ctx = NULL;
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g_autoptr(ListData) list_data = NULL;
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GPtrArray *devices;
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FpDevice *dev;
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g_print ("This program will report the prints saved in device\n");
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setenv ("G_MESSAGES_DEBUG", "all", 0);
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ctx = fp_context_new ();
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devices = fp_context_get_devices (ctx);
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if (!devices)
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{
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g_warning ("Impossible to get devices");
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return EXIT_FAILURE;
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}
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dev = discover_device (devices);
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if (!dev)
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{
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g_warning ("No devices detected.");
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return EXIT_FAILURE;
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}
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list_data = g_new0 (ListData, 1);
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list_data->ret_value = EXIT_FAILURE;
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list_data->loop = g_main_loop_new (NULL, FALSE);
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fp_device_open (dev, NULL, (GAsyncReadyCallback) on_device_opened, list_data);
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g_main_loop_run (list_data->loop);
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return list_data->ret_value;
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}
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