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/*
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* Simple file storage for fprintd
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* Copyright (C) 2007 Daniel Drake <dsd@gentoo.org>
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* Copyright (C) 2008 Vasily Khoruzhick <anarsoul@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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/* FIXME:
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* This file almost duplicate data.c from libfprint
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* Maybe someday data.c will be upgraded to this one ;)
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*/
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <glib.h>
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#include <glib/gstdio.h>
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#include <fprint.h>
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#include "file_storage.h"
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#define FILE_STORAGE_PATH "/var/lib/fprint"
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#define DIR_PERMS 0700
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#define FP_FINGER_IS_VALID(finger) \
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((finger) >= FP_FINGER_LEFT_THUMB && (finger) <= FP_FINGER_RIGHT_LITTLE)
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static const char *get_storage_path()
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{
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const char *path;
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/* set by systemd >= 240 to an absolute path
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* taking into account the StateDirectory
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* unit file setting */
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path = g_getenv ("STATE_DIRECTORY");
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if (path != NULL)
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return path;
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return FILE_STORAGE_PATH;
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}
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static char *get_path_to_storedir(const char *driver, const char * device_id, char *base_store)
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{
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return g_build_filename(base_store, driver, device_id, NULL);
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}
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static char *__get_path_to_print(const char *driver, const char * device_id,
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FpFinger finger, char *base_store)
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{
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char *dirpath;
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char *path;
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char fingername[2];
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g_snprintf(fingername, 2, "%x", finger);
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dirpath = get_path_to_storedir(driver, device_id, base_store);
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path = g_build_filename(dirpath, fingername, NULL);
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g_free(dirpath);
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return path;
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}
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static char *get_path_to_print(FpDevice *dev, FpFinger finger, char *base_store)
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{
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return __get_path_to_print(fp_device_get_driver (dev),
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fp_device_get_device_id(dev),
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finger,
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base_store);
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}
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static char *get_path_to_print_dscv(FpDevice *dev, FpFinger finger, char *base_store)
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{
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return __get_path_to_print(fp_device_get_driver (dev),
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fp_device_get_device_id(dev),
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finger,
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base_store);
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}
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static char *file_storage_get_basestore_for_username(const char *username)
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{
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return g_build_filename(get_storage_path(), username, NULL);
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}
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int file_storage_print_data_save(FpPrint *print)
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{
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g_autoptr(GError) err = NULL;
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g_autofree char *path = NULL;
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g_autofree char *dirpath = NULL;
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g_autofree char *base_store = NULL;
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g_autofree char *buf = NULL;
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gsize len;
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int r;
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base_store = file_storage_get_basestore_for_username(fp_print_get_username (print));
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if (!fp_print_serialize (print, (guchar **) &buf, &len, &err)) {
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g_warning ("Error serializing data: %s", err->message);
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return -ENOMEM;
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}
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path = __get_path_to_print(fp_print_get_driver (print),
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fp_print_get_device_id (print),
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fp_print_get_finger (print),
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base_store);
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dirpath = g_path_get_dirname(path);
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r = g_mkdir_with_parents(dirpath, DIR_PERMS);
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if (r < 0) {
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g_debug("file_storage_print_data_save(): could not mkdir(\"%s\"): %s",
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dirpath, g_strerror(r));
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return r;
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}
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//fp_dbg("saving to %s", path);
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g_file_set_contents(path, buf, len, &err;;
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if (err) {
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g_debug("file_storage_print_data_save(): could not save '%s': %s",
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path, err->message);
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/* FIXME interpret error codes */
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return err->code;
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}
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return 0;
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}
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static int load_from_file(char *path, FpPrint **print)
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{
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g_autoptr(GError) err = NULL;
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gsize length;
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char *contents;
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FpPrint *new;
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//fp_dbg("from %s", path);
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g_file_get_contents(path, &contents, &length, &err;;
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if (err) {
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int r = err->code;
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/* FIXME interpret more error codes */
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if (r == G_FILE_ERROR_NOENT)
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return -ENOENT;
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else
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return r;
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}
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new = fp_print_deserialize ((guchar *) contents, length, &err;;
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if (!new) {
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g_print ("Error deserializing data: %s", err->message);
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return -EIO;
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}
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*print = new;
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return 0;
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}
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int file_storage_print_data_load(FpDevice *dev,
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FpFinger finger,
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const char *username,
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FpPrint **print)
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{
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g_autofree gchar *path = NULL;
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g_autofree gchar *base_store = NULL;
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FpPrint *new = NULL;
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int r;
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base_store = file_storage_get_basestore_for_username(username);
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path = get_path_to_print(dev, finger, base_store);
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r = load_from_file(path, &new;;
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g_debug ("file_storage_print_data_load(): loaded '%s' %s",
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path, g_strerror(r));
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if (r)
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return r;
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if (!fp_print_compatible (new, dev)) {
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g_object_unref (new);
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return -EINVAL;
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}
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*print = new;
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return 0;
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}
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int file_storage_print_data_delete(FpDevice *dev, FpFinger finger, const char *username)
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{
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g_autofree gchar *base_store = NULL;
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g_autofree gchar *path = NULL;
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int r;
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base_store = file_storage_get_basestore_for_username(username);
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path = get_path_to_print_dscv(dev, finger, base_store);
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r = g_unlink(path);
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g_debug("file_storage_print_data_delete(): unlink(\"%s\") %s",
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path, g_strerror(r));
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/* FIXME: cleanup empty directory */
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return g_unlink(path);
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}
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static GSList *scan_dev_storedir(char *devpath,
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GSList *list)
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{
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g_autoptr(GError) err = NULL;
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const gchar *ent;
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GDir *dir = g_dir_open(devpath, 0, &err;;
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if (!dir) {
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g_debug("scan_dev_storedir(): opendir(\"%s\") failed: %s", devpath, err->message);
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return list;
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}
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while ((ent = g_dir_read_name(dir))) {
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/* ent is an 1 hex character fp_finger code */
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guint64 val;
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gchar *endptr;
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if (*ent == 0 || strlen(ent) != 1)
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continue;
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val = g_ascii_strtoull(ent, &endptr, 16);
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if (endptr == ent || !FP_FINGER_IS_VALID(val)) {
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g_debug("scan_dev_storedir(): skipping print file '%s'", ent);
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continue;
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}
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list = g_slist_prepend(list, GINT_TO_POINTER(val));
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}
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g_dir_close(dir);
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return list;
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}
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GSList *file_storage_discover_prints(FpDevice *dev, const char *username)
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{
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GSList *list = NULL;
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g_autofree gchar *base_store = NULL;
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g_autofree gchar *storedir = NULL;
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base_store = file_storage_get_basestore_for_username(username);
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storedir = get_path_to_storedir(fp_device_get_driver (dev),
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fp_device_get_device_id (dev),
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base_store);
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g_debug ("file_storage_discover_prints() for user '%s' in '%s'",
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username, storedir);
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list = scan_dev_storedir(storedir, list);
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return list;
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}
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GSList *file_storage_discover_users()
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{
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g_autoptr(GError) err = NULL;
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GSList *list = NULL;
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const gchar *ent;
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GDir *dir = g_dir_open(get_storage_path(), 0, &err;;
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if (!dir) {
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return list;
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}
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f1aff6 |
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while ((ent = g_dir_read_name(dir))) {
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f1aff6 |
/* ent is a username */
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if (*ent == 0)
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continue;
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f1aff6 |
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list = g_slist_prepend(list, g_strdup (ent));
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}
|
|
Packit Service |
f1aff6 |
|
|
Packit Service |
f1aff6 |
g_dir_close(dir);
|
|
Packit Service |
f1aff6 |
return list;
|
|
Packit Service |
f1aff6 |
}
|
|
Packit Service |
f1aff6 |
|
|
Packit Service |
f1aff6 |
int file_storage_init(void)
|
|
Packit Service |
f1aff6 |
{
|
|
Packit Service |
f1aff6 |
/* Nothing to do */
|
|
Packit Service |
f1aff6 |
return 0;
|
|
Packit Service |
f1aff6 |
}
|
|
Packit Service |
f1aff6 |
|
|
Packit Service |
f1aff6 |
int file_storage_deinit(void)
|
|
Packit Service |
f1aff6 |
{
|
|
Packit Service |
f1aff6 |
/* Nothing to do */
|
|
Packit Service |
f1aff6 |
return 0;
|
|
Packit Service |
f1aff6 |
}
|