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_LOCKSCREEN_APP,
 140                 SYSTEM_SETTING_DATA_TYPE_STRING,
 141                 system_setting_get_lockscreen_app,
 142                 system_setting_set_lockscreen_app,
 143                 system_setting_set_changed_callback_lockscreen_app,
 144                 system_setting_unset_changed_callback_lockscreen_app,
 145                 NULL,
 146                 NULL            /* user data */
 147         },
 148         {
 149                 SYSTEM_SETTINGS_KEY_DEFAULT_FONT_TYPE,
 150                 SYSTEM_SETTING_DATA_TYPE_STRING,
 151                 system_setting_get_default_font_type,
 152                 NULL,
 153                 NULL,
 154                 NULL,
 155                 NULL,
 156                 NULL            /* user data */
 157         },
 158         {
 159                 SYSTEM_SETTINGS_KEY_LOCALE_COUNTRY,
 160                 SYSTEM_SETTING_DATA_TYPE_STRING,
 161                 system_setting_get_locale_country,
 162                 system_setting_set_locale_country,
 163                 system_setting_set_changed_callback_locale_country,
 164                 system_setting_unset_changed_callback_locale_country,
 165                 NULL,
 166                 NULL            /* user data */
 167         },
 168         {
 169                 SYSTEM_SETTINGS_KEY_LOCALE_LANGUAGE,
 170                 SYSTEM_SETTING_DATA_TYPE_STRING,
 171                 system_setting_get_locale_language,
 172                 system_setting_set_locale_language,
 173                 system_setting_set_changed_callback_locale_language,
 174                 system_setting_unset_changed_callback_locale_language,
 175                 NULL,
 176                 NULL            /* user data */
 177         },
 178         {
 179                 SYSTEM_SETTINGS_KEY_LOCALE_TIMEFORMAT_24HOUR,
 180                 SYSTEM_SETTING_DATA_TYPE_BOOL,
 181                 system_setting_get_locale_timeformat_24hour,
 182                 system_setting_set_locale_timeformat_24hour,
 183                 system_setting_set_changed_callback_locale_timeformat_24hour,
 184                 system_setting_unset_changed_callback_locale_timeformat_24hour,
 185                 NULL,
 186                 NULL            /* user data */
 187         },
 188         {
 189                 SYSTEM_SETTINGS_KEY_LOCALE_TIMEZONE,
 190                 SYSTEM_SETTING_DATA_TYPE_STRING,
 191                 system_setting_get_locale_timezone,
 192                 NULL,
 193                 NULL,
 194                 NULL,
 195                 NULL,
 196                 NULL            /* user data */
 197         },
 198         {
 199                 SYSTEM_SETTINGS_KEY_TIME_CHANGED,
 200                 SYSTEM_SETTING_DATA_TYPE_INT,
 201                 system_setting_get_time_changed,
 202                 NULL,
 203                 system_setting_set_changed_callback_time_changed,
 204                 system_setting_unset_changed_callback_time_changed,
 205                 NULL,
 206                 NULL            /* user data */
 207         },
 208         {
 209                 SYSTEM_SETTINGS_KEY_SOUND_LOCK,
 210                 SYSTEM_SETTING_DATA_TYPE_BOOL,
 211                 system_setting_get_sound_lock,
 212                 NULL,
 213                 system_setting_set_changed_callback_sound_lock,
 214                 system_setting_unset_changed_callback_sound_lock,
 215                 NULL,
 216                 NULL            /* user data */
 217         },
 218         {
 219                 SYSTEM_SETTINGS_KEY_SOUND_SILENT_MODE,
 220                 SYSTEM_SETTING_DATA_TYPE_BOOL,
 221                 system_setting_get_sound_silent_mode,
 222                 system_setting_set_sound_silent_mode,
 223                 system_setting_set_changed_callback_sound_silent_mode,
 224                 system_setting_unset_changed_callback_sound_silent_mode,
 225                 NULL,
 226                 NULL            /* user data */
 227         },
 228         {
 229                 SYSTEM_SETTINGS_KEY_SOUND_TOUCH,
 230                 SYSTEM_SETTING_DATA_TYPE_BOOL,
 231                 system_setting_get_sound_touch,
 232                 NULL,
 233                 system_setting_set_changed_callback_sound_touch,
 234                 system_setting_unset_changed_callback_sound_touch,
 235                 NULL,
 236                 NULL            /* user data */
 237         },
 238         {
 239                 SYSTEM_SETTINGS_KEY_DISPLAY_SCREEN_ROTATION_AUTO,
 240                 SYSTEM_SETTING_DATA_TYPE_BOOL,
 241                 system_setting_get_auto_rotation_mode,
 242                 system_setting_set_auto_rotation_mode,
 243                 system_setting_set_changed_callback_auto_rotation_mode,
 244                 system_setting_unset_changed_callback_auto_rotation_mode,
 245                 NULL,
 246                 NULL            /* user data */
 247         },
 248         {
 249                 SYSTEM_SETTINGS_KEY_SCREEN_BACKLIGHT_TIME,
 250                 SYSTEM_SETTING_DATA_TYPE_INT,
 251                 system_setting_get_screen_backlight_time,
 252                 system_setting_set_screen_backlight_time,
 253                 system_setting_set_changed_callback_screen_backlight_time,
 254                 system_setting_unset_changed_callback_screen_backlight_time,
 255                 NULL,
 256                 NULL            /* user data */
 257         },
 258         {
 259                 SYSTEM_SETTINGS_KEY_SOUND_NOTIFICATION,
 260                 SYSTEM_SETTING_DATA_TYPE_STRING,
 261                 system_setting_get_sound_notification,
 262                 system_setting_set_sound_notification,
 263                 system_setting_set_changed_callback_sound_notification,
 264                 system_setting_unset_changed_callback_sound_notification,
 265                 NULL,
 266                 NULL            /* user data */
 267         },
 268         {
 269                 SYSTEM_SETTINGS_KEY_SOUND_NOTIFICATION_REPETITION_PERIOD,
 270                 SYSTEM_SETTING_DATA_TYPE_INT,
 271                 system_setting_get_notification_repetition_period,
 272                 system_setting_set_notification_repetition_period,
 273                 system_setting_set_changed_callback_notification_repetition_period,
 274                 system_setting_unset_changed_callback_notification_repetition_period,
 275                 NULL,
 276                 NULL            /* user data */
 277         },
 278         {
 279                 SYSTEM_SETTINGS_KEY_DEVICE_NAME,
 280                 SYSTEM_SETTING_DATA_TYPE_STRING,
 281                 system_setting_get_device_name,
 282                 NULL,
 283                 system_setting_set_changed_callback_device_name,
 284                 system_setting_unset_changed_callback_device_name,
 285                 NULL,
 286                 NULL            /* user data */
 287         },
 288         {
 289                 SYSTEM_SETTINGS_KEY_MOTION_ENABLED,
 290                 SYSTEM_SETTING_DATA_TYPE_BOOL,
 291                 system_setting_get_motion_activation,
 292                 NULL,
 293                 system_setting_set_changed_callback_motion_activation,
 294                 system_setting_unset_changed_callback_motion_activation,
 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 static int _dump_context_node(int key)
 342 {
 343         int index = 0;
 344
 345         if (!(key >= 0 && SYSTEM_SETTINGS_KEY_MAX > key)) {
 346                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 347         }
 348
 349         while (system_setting_table[index].key != SYSTEM_SETTINGS_MAX) {
 350                 if (system_setting_table[index].key == key) {
 351                         int i = index;
 352                         LOGE("[%s] system_setting_table[i].key = %d", __FUNCTION__, system_setting_table[i].key);
 353                         LOGE("[%s] system_setting_table[i].data_type = %d", __FUNCTION__, system_setting_table[i].data_type);
 354                         LOGE("[%s] system_setting_table[i].get_value_cb = %x", __FUNCTION__, system_setting_table[i].get_value_cb);
 355                         LOGE("[%s] system_setting_table[i].set_value_cb = %x", __FUNCTION__, system_setting_table[i].set_value_cb);
 356                         LOGE("[%s] system_setting_table[i].set_changed_cb = %x <---", __FUNCTION__, system_setting_table[i].set_changed_cb);
 357                         LOGE("[%s] system_setting_table[i].unset_changed_cb = %x", __FUNCTION__, system_setting_table[i].unset_changed_cb);
 358                         LOGE("[%s] system_setting_table[i].changed_cb = %x", __FUNCTION__, system_setting_table[i].changed_cb);
 359                         return 0;
 360                 }
 361                 index++;
 362         }
 363
 364         return -1;
 365 }
 366
 367 int system_settings_get_item(system_settings_key_e key, system_setting_h *item)
 368 {
 369         LOGE("Enter [%s], key=%d", __FUNCTION__, key);
 370
 371         if (!(key >= 0 && SYSTEM_SETTINGS_KEY_MAX > key)) {
 372                 LOGE("Enter [%s] catch invalid parameter error (%d) ", __FUNCTION__, key);
 373                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 374         }
 375 #if 0
 376         _dump_context();
 377 #endif
 378         int index = 0;
 379         while (system_setting_table[index].key != SYSTEM_SETTINGS_MAX) {
 380                 if (system_setting_table[index].key == key) {
 381                         *item = &system_setting_table[index];
 382                         LOGE("Enter [%s], index = %d, key = %d, type = %d", __FUNCTION__, index, key, (*item)->data_type);
 383                         return SYSTEM_SETTINGS_ERROR_NONE;
 384                 }
 385
 386                 index++;
 387         }
 388
 389         return TIZEN_ERROR_INVALID_PARAMETER;
 390 }
 391
 392 int system_settings_get_value(system_settings_key_e key, system_setting_data_type_e data_type, void **value)
 393 {
 394         LOGE("Enter [%s]", __FUNCTION__);
 395         if (!(key >= 0 && SYSTEM_SETTINGS_KEY_MAX > key)) {
 396                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 397         }
 398
 399         system_setting_h system_setting_item;
 400         system_setting_get_value_cb     system_setting_getter;
 401
 402         if (0 != system_settings_get_item(key, &system_setting_item)) {
 403                 _dump_context_node(key);
 404                 LOGE("[%s] INVALID_PARAMETER(0x%08x) : invalid key --- (%d)", __FUNCTION__, SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER, key);
 405                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 406         }
 407
 408         if (system_setting_item->data_type != data_type) {
 409                 _dump_context_node(key);
 410                 LOGE("[%s] INVALID_PARAMETER(0x%08x) : invalid data type --- key : (%d), datatype:(%d)", __FUNCTION__, SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER, key, data_type);
 411                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 412         }
 413
 414         system_setting_getter = system_setting_item->get_value_cb;
 415
 416         if (system_setting_getter == 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_getter(key, system_setting_item->data_type, value);
 422 }
 423
 424 int system_settings_set_value(system_settings_key_e key, system_setting_data_type_e data_type, void *value)
 425 {
 426         LOGE("Enter [%s]", __FUNCTION__);
 427         if (!(key >= 0 && SYSTEM_SETTINGS_KEY_MAX > key) || value == NULL) {
 428                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 429         }
 430
 431
 432         system_setting_h system_setting_item;
 433         system_setting_set_value_cb     system_setting_setter;
 434
 435         int ret = system_settings_get_item(key, &system_setting_item);
 436
 437         if (0 != ret ) {
 438                 LOGE("[%s] INVALID_PARAMETER(0x%08x) : invalid key", __FUNCTION__, SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER);
 439                 return SYSTEM_SETTINGS_ERROR_CALL_UNSUPPORTED_API;
 440         }
 441
 442         /* type check */
 443         if (system_setting_item->data_type != data_type) {
 444                 LOGE("[%s] INVALID_PARAMETER(0x%08x) : invalid data type", __FUNCTION__, SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER);
 445                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 446         }
 447
 448         system_setting_setter = system_setting_item->set_value_cb;
 449
 450         if (system_setting_setter == NULL) {
 451                 LOGE("[%s] IO_ERROR(0x%08x) : failed to call setter for the system settings", __FUNCTION__, SYSTEM_SETTINGS_ERROR_CALL_UNSUPPORTED_API);
 452                 return SYSTEM_SETTINGS_ERROR_CALL_UNSUPPORTED_API;
 453         }
 454
 455         return system_setting_setter(key, system_setting_item->data_type, value);
 456 }
 457
 458 int system_settings_set_value_int(system_settings_key_e key, int value)
 459 {
 460         LOGE("Enter [%s]", __FUNCTION__);
 461         if (!(key >= 0 && SYSTEM_SETTINGS_KEY_MAX > key)) {
 462                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 463         }
 464
 465         int *ptr = &value;
 466         return system_settings_set_value(key, SYSTEM_SETTING_DATA_TYPE_INT, (void *)ptr);
 467 }
 468
 469 int system_settings_get_value_int(system_settings_key_e key, int *value)
 470 {
 471         LOGE("Enter [%s]", __FUNCTION__);
 472         if (!(key >= 0 && SYSTEM_SETTINGS_KEY_MAX > key)) {
 473                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 474         }
 475
 476         return system_settings_get_value(key, SYSTEM_SETTING_DATA_TYPE_INT, (void **)value);
 477 }
 478
 479 int system_settings_set_value_bool(system_settings_key_e key, bool value)
 480 {
 481         LOGE("Enter [%s]", __FUNCTION__);
 482         if (!(key >= 0 && SYSTEM_SETTINGS_KEY_MAX > key)) {
 483                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 484         }
 485
 486         bool *ptr = &value;
 487         return system_settings_set_value(key, SYSTEM_SETTING_DATA_TYPE_BOOL, (void *)ptr);
 488 }
 489
 490 int system_settings_get_value_bool(system_settings_key_e key, bool *value)
 491 {
 492         LOGE("Enter [%s]", __FUNCTION__);
 493         int flag = 0;
 494
 495         int ret;
 496
 497         if (!(key >= 0 && SYSTEM_SETTINGS_KEY_MAX > key)) {
 498                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 499         }
 500
 501         ret = system_settings_get_value(key, SYSTEM_SETTING_DATA_TYPE_BOOL, (void **)&flag);
 502         SETTING_TRACE(" inf (flag) value : %d ", flag);
 503         if (flag == 0) {
 504                 *value = false;
 505                 SETTING_TRACE(" flag == 0 ");
 506         } else if (flag == 1) {
 507                 *value = true;
 508                 SETTING_TRACE(" flag == 1 ");
 509         } else {
 510                 *value = false;
 511                 SETTING_TRACE(" exception here!!! ");
 512         }
 513
 514         return ret;
 515 }
 516
 517 int system_settings_set_value_string(system_settings_key_e key, const char *value)
 518 {
 519         LOGE("Enter [%s]", __FUNCTION__);
 520         if (!(key >= 0 && SYSTEM_SETTINGS_KEY_MAX > key)) {
 521                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 522         }
 523
 524
 525         if (key == SYSTEM_SETTINGS_KEY_DEFAULT_FONT_TYPE)
 526                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 527
 528         return system_settings_set_value(key, SYSTEM_SETTING_DATA_TYPE_STRING, (void *)value);
 529 }
 530
 531 int system_settings_get_value_string(system_settings_key_e key, char **value)
 532 {
 533         LOGE("Enter [%s]", __FUNCTION__);
 534         if (!(key >= 0 && SYSTEM_SETTINGS_KEY_MAX > key)) {
 535                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 536         }
 537
 538         return system_settings_get_value(key, SYSTEM_SETTING_DATA_TYPE_STRING, (void **)value);
 539 }
 540
 541
 542 /*PUBLIC*/
 543 int system_settings_set_changed_cb(system_settings_key_e key, system_settings_changed_cb callback, void *user_data)
 544 {
 545         LOGE("Enter [%s]", __FUNCTION__);
 546         system_setting_h system_setting_item;
 547         system_setting_set_changed_callback_cb system_setting_set_changed_cb;
 548
 549         if (!(key >= 0 && SYSTEM_SETTINGS_KEY_MAX > key)) {
 550                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 551         }
 552
 553         if (key == SYSTEM_SETTINGS_KEY_DEFAULT_FONT_TYPE)
 554                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 555
 556         if (system_settings_get_item(key, &system_setting_item)) {
 557                 LOGE("[%s] INVALID_PARAMETER(0x%08x) : invalid key", __FUNCTION__, SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER);
 558                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 559         }
 560
 561         system_setting_set_changed_cb = system_setting_item->set_changed_cb;
 562
 563
 564         /* Store the callback function from application side */
 565         if (callback)
 566                 system_setting_item->changed_cb = callback;
 567
 568         if (user_data)
 569                 system_setting_item->user_data = user_data;
 570
 571         if (system_setting_set_changed_cb == NULL) {
 572                 LOGE("[%s] IO_ERROR(0x%08x) : failed to call getter for the system settings", __FUNCTION__, SYSTEM_SETTINGS_ERROR_IO_ERROR);
 573                 return SYSTEM_SETTINGS_ERROR_IO_ERROR;
 574         }
 575
 576         return system_setting_set_changed_cb(key, callback, user_data);
 577 }
 578
 579
 580 int system_settings_unset_changed_cb(system_settings_key_e key)
 581 {
 582         LOGE("Enter [%s]", __FUNCTION__);
 583         system_setting_h system_setting_item;
 584         system_setting_unset_changed_callback_cb system_setting_unset_changed_cb;
 585
 586         if (!(key >= 0 && SYSTEM_SETTINGS_KEY_MAX > key)) {
 587                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 588         }
 589
 590         if (key == SYSTEM_SETTINGS_KEY_DEFAULT_FONT_TYPE)
 591                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 592
 593         int ret = system_settings_get_item(key, &system_setting_item) ;
 594         if (ret) {
 595                 LOGE("[%s] INVALID_PARAMETER(0x%08x) : invalid key", __FUNCTION__, SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER);
 596                 return SYSTEM_SETTINGS_ERROR_INVALID_PARAMETER;
 597         }
 598
 599         system_setting_unset_changed_cb = system_setting_item->unset_changed_cb;
 600
 601         /* free the callback function from application side */
 602         if (system_setting_item->changed_cb)
 603                 system_setting_item->changed_cb = NULL;
 604         /*----------------------------------------------------- */
 605
 606         if (system_setting_unset_changed_cb == NULL) {
 607                 LOGE("[%s] IO_ERROR(0x%08x) : failed to call getter for the system settings", __FUNCTION__, SYSTEM_SETTINGS_ERROR_IO_ERROR);
 608                 return SYSTEM_SETTINGS_ERROR_IO_ERROR;
 609         }
 610
 611         return system_setting_unset_changed_cb(key);
 612 }
 613