src/system_settings.c

   1 /*
   2  * Copyright (c) 2011 Samsung Electronics Co., Ltd All Rights Reserved
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the License);
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an AS IS BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include <stdio.h>
  18 #include <stdlib.h>
  19 #include <string.h>
  20
  21 #include <vconf.h>
  22 #include <dlog.h>
  23
  24 #include <system_settings.h>
  25 #include <system_settings_private.h>
  26
  27 #include <glib.h>
  28
  29
  30 #ifdef LOG_TAG
  31 #undef LOG_TAG
  32 #endif
  33
  34 #define LOG_TAG "TIZEN_N_SYSTEM_SETTINGS"
  35
  36 #define SYSTEM_SETTINGS_MAX -1
  37
  38
  39
  40 system_setting_s system_setting_table[] = {
  41
  42         {
  43                 SYSTEM_SETTINGS_KEY_INCOMING_CALL_RINGTONE,
  44                 SYSTEM_SETTING_DATA_TYPE_STRING,
  45                 system_setting_get_incoming_call_ringtone,
  46                 system_setting_set_incoming_call_ringtone,
  47                 system_setting_set_changed_callback_incoming_call_ringtone,
  48                 system_setting_unset_changed_callback_incoming_call_ringtone,
  49                 NULL,
  50                 NULL            /* user data */
  51         },
  52
  53         {
  54                 SYSTEM_SETTINGS_KEY_WALLPAPER_HOME_SCREEN,
  55                 SYSTEM_SETTING_DATA_TYPE_STRING,
  56                 system_setting_get_wallpaper_home_screen,
  57                 system_setting_set_wallpaper_home_screen,
  58                 system_setting_set_changed_callback_wallpaper_home_screen,
  59                 system_setting_unset_changed_callback_wallpaper_home_screen,
  60                 NULL,
  61                 NULL            /* user data */
  62         },
  63
  64         {
  65                 SYSTEM_SETTINGS_KEY_WALLPAPER_LOCK_SCREEN,
  66                 SYSTEM_SETTING_DATA_TYPE_STRING,
  67                 system_setting_get_wallpaper_lock_screen,
  68                 system_setting_set_wallpaper_lock_screen,
  69                 system_setting_set_changed_callback_wallpaper_lock_screen,
  70                 system_setting_unset_changed_callback_wallpaper_lock_screen,
  71                 NULL,
  72                 NULL            /* user data */
  73         },
  74
  75         {
  76                 SYSTEM_SETTINGS_KEY_FONT_SIZE,
  77                 SYSTEM_SETTING_DATA_TYPE_INT,
  78                 system_setting_get_font_size,
  79                 system_setting_set_font_size,
  80                 system_setting_set_changed_callback_font_size,
  81                 system_setting_unset_changed_callback_font_size,
  82                 NULL,
  83                 NULL            /* user data */
  84         },
  85
  86         {
  87                 SYSTEM_SETTINGS_KEY_FONT_TYPE,
  88                 SYSTEM_SETTING_DATA_TYPE_STRING,
  89                 system_setting_get_font_type,
  90                 system_setting_set_font_type,
  91                 system_setting_set_changed_callback_font_type,
  92                 system_setting_unset_changed_callback_font_type,
  93                 NULL,
  94                 NULL            /* user data */
  95         },
  96
  97         {
  98                 SYSTEM_SETTINGS_KEY_MOTION_ACTIVATION,
  99                 SYSTEM_SETTING_DATA_TYPE_BOOL,
 100                 system_setting_get_motion_activation,
 101                 system_setting_set_motion_activation,
 102                 system_setting_set_changed_callback_motion_activation,
 103                 system_setting_unset_changed_callback_motion_activation,
 104                 NULL,
 105                 NULL            /* user data */
 106         },
 107
 108         {
 109                 SYSTEM_SETTINGS_KEY_EMAIL_ALERT_RINGTONE,
 110                 SYSTEM_SETTING_DATA_TYPE_STRING,
 111                 system_setting_get_email_alert_ringtone,
 112                 system_setting_set_email_alert_ringtone,
 113                 system_setting_set_changed_callback_email_alert_ringtone,
 114                 system_setting_unset_changed_callback_email_alert_ringtone,
 115                 NULL,
 116                 NULL            /* user data */
 117         },
 118         {
 119                 SYSTEM_SETTINGS_KEY_USB_DEBUGGING_ENABLED,
 120                 SYSTEM_SETTING_DATA_TYPE_BOOL,
 121                 system_setting_get_usb_debugging_option,
 122                 system_setting_set_usb_debugging_option,
 123                 system_setting_set_changed_callback_usb_debugging_option,
 124                 system_setting_unset_changed_callback_usb_debugging_option,
 125                 NULL,
 126                 NULL            /* user data */
 127         },
 128         {
 129                 SYSTEM_SETTINGS_KEY_3G_DATA_NETWORK_ENABLED,
 130                 SYSTEM_SETTING_DATA_TYPE_BOOL,
 131                 system_setting_get_3g_data_network,
 132                 system_setting_set_3g_data_network,
 133                 system_setting_set_changed_callback_3g_data_network,
 134                 system_setting_unset_changed_callback_3g_data_network,
 135                 NULL,
 136                 NULL            /* user data */
 137         },
 138         {
 139                 SYSTEM_SETTINGS_KEY_TAP_AND_HOLD_DELAY,
 140                 SYSTEM_SETTING_DATA_TYPE_INT,
 141                 system_setting_get_tap_and_hold_delay,
 142                 system_setting_set_tap_and_hold_delay,
 143                 system_setting_set_changed_callback_tap_and_hold_delay,
 144                 system_setting_unset_changed_callback_tap_and_hold_delay,
 145                 NULL,
 146                 NULL            /* user data */
 147         },
 148         {
 149                 SYSTEM_SETTINGS_KEY_LOCKSCREEN_APP,
 150                 SYSTEM_SETTING_DATA_TYPE_STRING,
 151                 system_setting_get_lockscreen_app,
 152                 system_setting_set_lockscreen_app,
 153                 system_setting_set_changed_callback_lockscreen_app,
 154                 system_setting_unset_changed_callback_lockscreen_app,
 155                 NULL,
 156                 NULL            /* user data */
 157         },
 158         {
 159                 SYSTEM_SETTINGS_KEY_DEFAULT_FONT_TYPE,
 160                 SYSTEM_SETTING_DATA_TYPE_STRING,
 161                 system_setting_get_default_font_type,
 162                 NULL,
 163                 NULL,
 164                 NULL,
 165                 NULL,
 166                 NULL            /* user data */
 167         },
 168         {
 169                 SYSTEM_SETTINGS_KEY_LOCALE_COUNTRY,
 170                 SYSTEM_SETTING_DATA_TYPE_STRING,
 171                 system_setting_get_locale_country,
 172                 system_setting_set_locale_country,
 173                 system_setting_set_changed_callback_locale_country,
 174                 system_setting_unset_changed_callback_locale_country,
 175                 NULL,
 176                 NULL            /* user data */
 177         },
 178         {
 179                 SYSTEM_SETTINGS_KEY_LOCALE_LANGUAGE,
 180                 SYSTEM_SETTING_DATA_TYPE_STRING,
 181                 system_setting_get_locale_language,
 182                 system_setting_set_locale_language,
 183                 system_setting_set_changed_callback_locale_language,
 184                 system_setting_unset_changed_callback_locale_language,
 185                 NULL,
 186                 NULL            /* user data */
 187         },
 188         {
 189                 SYSTEM_SETTINGS_KEY_LOCALE_TIMEFORMAT_24HOUR,
 190                 SYSTEM_SETTING_DATA_TYPE_BOOL,
 191                 system_setting_get_locale_timeformat_24hour,
 192                 system_setting_set_locale_timeformat_24hour,
 193                 system_setting_set_changed_callback_locale_timeformat_24hour,
 194                 system_setting_unset_changed_callback_locale_timeformat_24hour,
 195                 NULL,
 196                 NULL            /* user data */
 197         },
 198         {
 199                 SYSTEM_SETTINGS_KEY_LOCALE_TIMEZONE,
 200                 SYSTEM_SETTING_DATA_TYPE_STRING,
 201                 system_setting_get_locale_timezone,
 202                 NULL,
 203                 NULL,
 204                 NULL,
 205                 NULL,
 206                 NULL            /* user data */
 207         },
 208         {
 209                 SYSTEM_SETTINGS_KEY_TIME_CHANGED,
 210                 SYSTEM_SETTING_DATA_TYPE_INT,
 211                 system_setting_get_time_changed,
 212                 NULL,
 213                 system_setting_set_changed_callback_time_changed,
 214                 system_setting_unset_changed_callback_time_changed,
 215                 NULL,
 216                 NULL            /* user data */
 217         },
 218         {
 219                 SYSTEM_SETTINGS_KEY_SOUND_LOCK,
 220                 SYSTEM_SETTING_DATA_TYPE_BOOL,
 221                 system_setting_get_sound_lock,
 222                 NULL,
 223                 system_setting_set_changed_callback_sound_lock,
 224                 system_setting_unset_changed_callback_sound_lock,
 225                 NULL,
 226                 NULL            /* user data */
 227         },
 228         {
 229                 SYSTEM_SETTINGS_KEY_SOUND_SILENT_MODE,
 230                 SYSTEM_SETTING_DATA_TYPE_BOOL,
 231                 system_setting_get_sound_silent_mode,
 232                 system_setting_set_sound_silent_mode,
 233                 system_setting_set_changed_callback_sound_silent_mode,
 234                 system_setting_unset_changed_callback_sound_silent_mode,
 235                 NULL,
 236                 NULL            /* user data */
 237         },
 238         {
 239                 SYSTEM_SETTINGS_KEY_SOUND_TOUCH,
 240                 SYSTEM_SETTING_DATA_TYPE_BOOL,
 241                 system_setting_get_sound_touch,
 242                 NULL,
 243                 system_setting_set_changed_callback_sound_touch,
 244                 system_setting_unset_changed_callback_sound_touch,
 245                 NULL,
 246                 NULL            /* user data */
 247         },
 248         {
 249                 SYSTEM_SETTINGS_KEY_DISPLAY_SCREEN_ROTATION_AUTO,
 250                 SYSTEM_SETTING_DATA_TYPE_BOOL,
 251                 system_setting_get_auto_rotation_mode,
 252                 system_setting_set_auto_rotation_mode,
 253                 system_setting_set_changed_callback_auto_rotation_mode,
 254                 system_setting_unset_changed_callback_auto_rotation_mode,
 255                 NULL,
 256                 NULL            /* user data */
 257         },
 258         {
 259                 SYSTEM_SETTINGS_KEY_SCREEN_BACKLIGHT_TIME,
 260                 SYSTEM_SETTING_DATA_TYPE_INT,
 261                 system_setting_get_screen_backlight_time,
 262                 system_setting_set_screen_backlight_time,
 263                 system_setting_set_changed_callback_screen_backlight_time,
 264                 system_setting_unset_changed_callback_screen_backlight_time,
 265                 NULL,
 266                 NULL            /* user data */
 267         },
 268         {
 269                 SYSTEM_SETTINGS_KEY_SOUND_NOTIFICATION,
 270                 SYSTEM_SETTING_DATA_TYPE_STRING,
 271                 system_setting_get_sound_notification,
 272                 system_setting_set_sound_notification,
 273                 system_setting_set_changed_callback_sound_notification,
 274                 system_setting_unset_changed_callback_sound_notification,
 275                 NULL,
 276                 NULL            /* user data */
 277         },
 278         {
 279                 SYSTEM_SETTINGS_KEY_SOUND_NOTIFICATION_REPETITION_PERIOD,
 280                 SYSTEM_SETTING_DATA_TYPE_INT,
 281                 system_setting_get_notification_repetition_period,
 282                 system_setting_set_notification_repetition_period,
 283                 system_setting_set_changed_callback_notification_repetition_period,
 284                 system_setting_unset_changed_callback_notification_repetition_period,
 285                 NULL,
 286                 NULL            /* user data */
 287         },
 288         {
 289                 SYSTEM_SETTINGS_KEY_DEVICE_NAME,
 290                 SYSTEM_SETTING_DATA_TYPE_STRING,
 291                 system_setting_get_device_name,
 292                 NULL,
 293                 system_setting_set_changed_callback_device_name,
 294                 system_setting_unset_changed_callback_device_name,
 295                 NULL,
 296                 NULL            /* user data */
 297         },
 298         {
 299                 SYSTEM_SETTINGS_KEY_NETWORK_FLIGHT_MODE,
 300                 SYSTEM_SETTING_DATA_TYPE_BOOL,
 301                 system_setting_get_network_flight_mode,
 302                 NULL,
 303                 system_setting_set_changed_callback_network_flight_mode,
 304                 system_setting_unset_changed_callback_network_flight_mode,
 305                 NULL,
 306                 NULL            /* user data */
 307         },
 308         {
 309                 SYSTEM_SETTINGS_KEY_NETWORK_WIFI_NOTIFICATION,
 310                 SYSTEM_SETTING_DATA_TYPE_BOOL,
 311                 system_setting_get_network_wifi_notification,
 312                 NULL,
 313                 system_setting_set_changed_callback_network_wifi_notification,
 314                 system_setting_unset_changed_callback_network_wifi_notification,
 315                 NULL,
 316                 NULL            /* user data */
 317         },
 318         {
 319                 SYSTEM_SETTINGS_MAX, -1, NULL, NULL, NULL, NULL, NULL, NULL
 320         }
 321 };
 322
 323 static void _dump_context()
 324 {
 325         int i;
 326         /*int max = SYSTEM_SETTINGS_MAX; */
 327         int max = sizeof(system_setting_table) / sizeof(system_setting_s) - 1 ;
 328
 329         for (i = 0; i < 27; i++) {
 330                 LOGE("[%s] system_setting_table[i].key = %d", __FUNCTION__, system_setting_table[i].key);
 331                 LOGE("[%s] system_setting_table[i].data_type = %d", __FUNCTION__, system_setting_table[i].data_type);
 332                 LOGE("[%s] system_setting_table[i].get_value_cb = %x", __FUNCTION__, system_setting_table[i].get_value_cb);
 333                 LOGE("[%s] system_setting_table[i].set_value_cb = %x", __FUNCTION__, system_setting_table[i].set_value_cb);
 334
 335                 LOGE("[%s] system_setting_table[i].set_changed_cb = %x <---", __FUNCTION__, system_setting_table[i].set_changed_cb);
 336                 LOGE("[%s] system_setting_table[i].unset_changed_cb = %x", __FUNCTION__, system_setting_table[i].unset_changed_cb);
 337                 LOGE("[%s] system_setting_table[i].changed_cb = %x", __FUNCTION__, system_setting_table[i].changed_cb);
 338         }
 339 }
 340
 341
 342 int system_settings_get_item(system_settings_key_e key, system_setting_h *item)
 343 {
 344         int index = 0;
 345
 346         if (!(key > 0 && SYSTEM_SETTINGS_KEY_MAX > key)) {
 347                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 348         }
 349 #if 0
 350         _dump_context();
 351 #endif
 352         while (system_setting_table[index].key != SYSTEM_SETTINGS_MAX) {
 353                 if (system_setting_table[index].key == key) {
 354                         *item = &system_setting_table[index];
 355                         return 0;
 356                 }
 357
 358                 index++;
 359         }
 360
 361         return -1;
 362 }
 363
 364 int system_settings_get_value(system_settings_key_e key, system_setting_data_type_e data_type, void **value)
 365 {
 366         if (!(key > 0 && SYSTEM_SETTINGS_KEY_MAX > key)) {
 367                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 368         }
 369
 370         system_setting_h system_setting_item;
 371         system_setting_get_value_cb     system_setting_getter;
 372
 373         if (system_settings_get_item(key, &system_setting_item)) {
 374                 LOGE("[%s] INVALID_PARAMETER(0x%08x) : invalid key --- (%d)", __FUNCTION__, SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER, key);
 375                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 376         }
 377
 378         if (system_setting_item->data_type != data_type) {
 379                 LOGE("[%s] INVALID_PARAMETER(0x%08x) : invalid data type", __FUNCTION__, SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER);
 380                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 381         }
 382
 383         system_setting_getter = system_setting_item->get_value_cb;
 384
 385         if (system_setting_getter == NULL) {
 386                 LOGE("[%s] IO_ERROR(0x%08x) : failed to call getter for the system settings", __FUNCTION__, SYSTEM_SETTINGS_ERROR_IO_ERROR);
 387                 return SYSTEM_SETTINGS_ERROR_IO_ERROR;
 388         }
 389
 390         return system_setting_getter(key, system_setting_item->data_type, value);
 391 }
 392
 393 int system_settings_set_value(system_settings_key_e key, system_setting_data_type_e data_type, void *value)
 394 {
 395         if (!(key > 0 && SYSTEM_SETTINGS_KEY_MAX > key) || value == NULL) {
 396                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 397         }
 398
 399
 400         system_setting_h system_setting_item;
 401         system_setting_set_value_cb     system_setting_setter;
 402
 403         if (system_settings_get_item(key, &system_setting_item)) {
 404                 LOGE("[%s] INVALID_PARAMETER(0x%08x) : invalid key", __FUNCTION__, SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER);
 405                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 406         }
 407
 408         /* type check */
 409         if (system_setting_item->data_type != data_type) {
 410                 LOGE("[%s] INVALID_PARAMETER(0x%08x) : invalid data type", __FUNCTION__, SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER);
 411                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 412         }
 413
 414         system_setting_setter = system_setting_item->set_value_cb;
 415
 416         if (system_setting_setter == NULL) {
 417                 LOGE("[%s] IO_ERROR(0x%08x) : failed to call getter for the system settings", __FUNCTION__, SYSTEM_SETTINGS_ERROR_IO_ERROR);
 418                 return SYSTEM_SETTINGS_ERROR_IO_ERROR;
 419         }
 420
 421         return system_setting_setter(key, system_setting_item->data_type, value);
 422 }
 423
 424 int system_settings_set_value_int(system_settings_key_e key, int value)
 425 {
 426         if (!(key > 0 && SYSTEM_SETTINGS_KEY_MAX > key)) {
 427                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 428         }
 429
 430         int *ptr = &value;
 431         return system_settings_set_value(key, SYSTEM_SETTING_DATA_TYPE_INT, (void *)ptr);
 432 }
 433
 434 int system_settings_get_value_int(system_settings_key_e key, int *value)
 435 {
 436         if (!(key > 0 && SYSTEM_SETTINGS_KEY_MAX > key) || value == NULL) {
 437                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 438         }
 439
 440         return system_settings_get_value(key, SYSTEM_SETTING_DATA_TYPE_INT, (void **)value);
 441 }
 442
 443 int system_settings_set_value_bool(system_settings_key_e key, bool value)
 444 {
 445         if (!(key > 0 && SYSTEM_SETTINGS_KEY_MAX > key)) {
 446                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 447         }
 448
 449         bool *ptr = &value;
 450         return system_settings_set_value(key, SYSTEM_SETTING_DATA_TYPE_BOOL, (void *)ptr);
 451 }
 452
 453 int system_settings_get_value_bool(system_settings_key_e key, bool *value)
 454 {
 455         int flag = 0;
 456
 457         int ret;
 458
 459         if (!(key > 0 && SYSTEM_SETTINGS_KEY_MAX > key) || value == NULL) {
 460                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 461         }
 462
 463
 464
 465         ret = system_settings_get_value(key, SYSTEM_SETTING_DATA_TYPE_BOOL, (void **)&flag);
 466         SETTING_TRACE(" inf (flag) value : %d ", flag);
 467         if (flag == 0) {
 468                 *value = false;
 469                 SETTING_TRACE(" flag == 0 ");
 470         } else if (flag == 1) {
 471                 *value = true;
 472                 SETTING_TRACE(" flag == 1 ");
 473         } else {
 474                 *value = false;
 475                 SETTING_TRACE(" exception here!!! ");
 476         }
 477
 478         return ret;
 479 }
 480
 481 int system_settings_set_value_string(system_settings_key_e key, const char *value)
 482 {
 483         if (!(key > 0 && SYSTEM_SETTINGS_KEY_MAX > key)) {
 484                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 485         }
 486
 487
 488         if (key == SYSTEM_SETTINGS_KEY_DEFAULT_FONT_TYPE)
 489                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 490
 491         return system_settings_set_value(key, SYSTEM_SETTING_DATA_TYPE_STRING, (void *)value);
 492 }
 493
 494 int system_settings_get_value_string(system_settings_key_e key, char **value)
 495 {
 496         if (!(key > 0 && SYSTEM_SETTINGS_KEY_MAX > key)) {
 497                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 498         }
 499
 500         return system_settings_get_value(key, SYSTEM_SETTING_DATA_TYPE_STRING, (void **)value);
 501 }
 502
 503
 504 /*
 505         - START
 506                 - system_settings_set_changed_cb
 507                         -> int (*system_setting_set_changed_callback_cb)(key, callback, user_data)
 508 */
 509
 510 /*PUBLIC*/
 511 int system_settings_set_changed_cb(system_settings_key_e key, system_settings_changed_cb callback, void *user_data)
 512 {
 513         system_setting_h system_setting_item;
 514         system_setting_set_changed_callback_cb system_setting_set_changed_cb;
 515
 516         if (!(key > 0 && SYSTEM_SETTINGS_KEY_MAX > key)) {
 517                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 518         }
 519
 520         if (key == SYSTEM_SETTINGS_KEY_DEFAULT_FONT_TYPE)
 521                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 522
 523         if (system_settings_get_item(key, &system_setting_item)) {
 524                 LOGE("[%s] INVALID_PARAMETER(0x%08x) : invalid key", __FUNCTION__, SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER);
 525                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 526         }
 527
 528         system_setting_set_changed_cb = system_setting_item->set_changed_cb;
 529
 530
 531         /* Store the callback function from application side */
 532         if (callback)
 533                 system_setting_item->changed_cb = callback;
 534
 535         if (user_data)
 536                 system_setting_item->user_data = user_data;
 537
 538         if (system_setting_set_changed_cb == NULL) {
 539                 LOGE("[%s] IO_ERROR(0x%08x) : failed to call getter for the system settings", __FUNCTION__, SYSTEM_SETTINGS_ERROR_IO_ERROR);
 540                 return SYSTEM_SETTINGS_ERROR_IO_ERROR;
 541         }
 542
 543         return system_setting_set_changed_cb(key, callback, user_data);
 544 }
 545
 546
 547 int system_settings_unset_changed_cb(system_settings_key_e key)
 548 {
 549         system_setting_h system_setting_item;
 550         system_setting_unset_changed_callback_cb system_setting_unset_changed_cb;
 551
 552         if (!(key > 0 && SYSTEM_SETTINGS_KEY_MAX > key)) {
 553                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 554         }
 555
 556         if (key == SYSTEM_SETTINGS_KEY_DEFAULT_FONT_TYPE)
 557                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 558
 559         int ret = system_settings_get_item(key, &system_setting_item) ;
 560         if (ret) {
 561                 LOGE("[%s] INVALID_PARAMETER(0x%08x) : invalid key", __FUNCTION__, SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER);
 562                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 563         }
 564
 565         system_setting_unset_changed_cb = system_setting_item->unset_changed_cb;
 566
 567         /* free the callback function from application side */
 568         if (system_setting_item->changed_cb)
 569                 system_setting_item->changed_cb = NULL;
 570         /*----------------------------------------------------- */
 571
 572         if (system_setting_unset_changed_cb == NULL) {
 573                 LOGE("[%s] IO_ERROR(0x%08x) : failed to call getter for the system settings", __FUNCTION__, SYSTEM_SETTINGS_ERROR_IO_ERROR);
 574                 return SYSTEM_SETTINGS_ERROR_IO_ERROR;
 575         }
 576
 577         return system_setting_unset_changed_cb(key);
 578 }
 579