314cfba9bb
When deleting prints, the API user should also delete the print from the storage (for devices that support on-device storage). Add an example to show how to do this.
115 lines
2.9 KiB
C
115 lines
2.9 KiB
C
/*
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* Example fingerprint delete finger program, which delete the right index
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* finger which has been previously enrolled to disk.
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* Copyright (C) 2019 Synaptics Inc
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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 <stdlib.h>
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#include <unistd.h>
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#include <libfprint/fprint.h>
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struct fp_dscv_dev *discover_device(struct fp_dscv_dev **discovered_devs)
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{
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struct fp_dscv_dev *ddev = discovered_devs[0];
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struct fp_driver *drv;
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if (!ddev)
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return NULL;
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drv = fp_dscv_dev_get_driver(ddev);
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printf("Found device claimed by %s driver\n", fp_driver_get_full_name(drv));
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return ddev;
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}
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int main(void)
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{
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int r = 1;
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struct fp_dscv_dev *ddev;
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struct fp_dscv_dev **discovered_devs;
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struct fp_dev *dev;
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struct fp_print_data *data;
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setenv ("G_MESSAGES_DEBUG", "all", 0);
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setenv ("LIBUSB_DEBUG", "3", 0);
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r = fp_init();
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if (r < 0) {
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fprintf(stderr, "Failed to initialize libfprint\n");
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exit(1);
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}
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discovered_devs = fp_discover_devs();
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if (!discovered_devs) {
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fprintf(stderr, "Could not discover devices\n");
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goto out;
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}
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ddev = discover_device(discovered_devs);
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if (!ddev) {
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fprintf(stderr, "No devices detected.\n");
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goto out;
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}
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dev = fp_dev_open(ddev);
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fp_dscv_devs_free(discovered_devs);
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if (!dev) {
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fprintf(stderr, "Could not open device.\n");
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goto out;
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}
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printf("Opened device. Loading previously enrolled right index finger "
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"data...\n");
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r = fp_print_data_load(dev, RIGHT_INDEX, &data);
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if (r != 0) {
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fprintf(stderr, "Failed to load fingerprint, error %d\n", r);
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fprintf(stderr, "Did you remember to enroll your right index finger "
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"first?\n");
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goto out_close;
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}
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printf("Print loaded. delete data in sensor.\n");
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if(!fp_dev_supports_data_in_sensor(dev))
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{
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printf("This driver doesn't support to store data in sensor.\n");
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goto out_close;
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}
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r = fp_delete_finger(dev, data);
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fp_print_data_free(data);
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if (r) {
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printf("delete finger failed with error %d :(\n", r);
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}
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else
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{
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printf("sensor data deleted. now delete host data");
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r = fp_print_data_delete(dev, RIGHT_INDEX);
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if (r < 0) {
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printf("Delete sensor data successfully but delete host data failed. %d :(\n", r);
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}
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}
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out_close:
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fp_dev_close(dev);
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out:
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fp_exit();
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return r;
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}
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