src/app2ext_interface.c

   1 /*
   2  * app2ext
   3  *
   4  * Copyright (c) 2012 Samsung Electronics Co., Ltd. All rights reserved.
   5  *
   6  * Contact: Jyotsna Dhumale <jyotsna.a@samsung.com>
   7  *
   8  * Licensed under the Apache License, Version 2.0 (the "License");
   9  * you may not use this file except in compliance with the License.
  10  * You may obtain a copy of the License at
  11  *
  12  * http://www.apache.org/licenses/LICENSE-2.0
  13  *
  14  * Unless required by applicable law or agreed to in writing, software
  15  * distributed under the License is distributed on an "AS IS" BASIS,
  16  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  17  * See the License for the specific language governing permissions and
  18  * limitations under the License.
  19  *
  20  */
  21
  22 #include <errno.h>
  23 #include <unistd.h>
  24 #include <sys/types.h>
  25 #include <sys/wait.h>
  26 #include <dlfcn.h>
  27 #include <string.h>
  28 #include <stdlib.h>
  29 #include <stdio.h>
  30 #include <dirent.h>
  31
  32 #include "app2ext_interface.h"
  33 #include "app2ext_utils.h"
  34
  35 #define APP2EXT_SD_PLUGIN_PATH  LIBPREFIX "/libapp2sd.so"
  36
  37 app2ext_handle *app2ext_init(int storage_type)
  38 {
  39         void *dl_handle = NULL;
  40         int (*dl_on_load)(app2ext_interface *) = NULL;
  41
  42         /* validate the function parameter recieved */
  43         if (storage_type < APP2EXT_INTERNAL_MEM ||
  44                 storage_type > APP2EXT_CLOUD) {
  45                 _E("invalid function arguments");
  46                 return NULL;
  47         }
  48         if (storage_type != APP2EXT_SD_CARD) {
  49                 _E("storage type currently not supported");
  50                 return NULL;
  51         }
  52
  53         /* allocate memory for app2ext handle*/
  54         app2ext_handle *handle = (app2ext_handle *)calloc(1, sizeof(app2ext_handle));
  55         if (handle == NULL) {
  56                 _E("memory allocation failed");
  57                 return NULL;
  58         }
  59
  60         /* load SD plugin*/
  61         handle->type = APP2EXT_SD_CARD;
  62         dl_handle = dlopen(APP2EXT_SD_PLUGIN_PATH, RTLD_LAZY|RTLD_GLOBAL);
  63         if (NULL == dl_handle) {
  64                 _E("dlopen(%s) failed", APP2EXT_SD_PLUGIN_PATH);
  65                 free(handle);
  66                 return NULL;
  67         }
  68
  69         handle->plugin_handle = dl_handle;
  70         dl_on_load = dlsym(dl_handle, "app2ext_on_load");
  71         if (NULL == dl_on_load) {
  72                 _E("cannot find app2ext_on_load symbol in (%s)", APP2EXT_SD_PLUGIN_PATH);
  73                 dlclose(dl_handle);
  74                 free(handle);
  75                 return NULL;
  76         }
  77
  78         /* initialize the SD plugin*/
  79         if (!dl_on_load(&(handle->interface))) {
  80                 _E("app2ext_on_load() failed in (%s)", APP2EXT_SD_PLUGIN_PATH);
  81                 dlclose(dl_handle);
  82                 free(handle);
  83                 return NULL;
  84         }
  85
  86         _D("plugin(%s) loaded", APP2EXT_SD_PLUGIN_PATH);
  87
  88         return handle;
  89 }
  90
  91 int app2ext_deinit(app2ext_handle *handle)
  92 {
  93         /* validate the function parameter recieved */
  94         if (handle == NULL || handle->plugin_handle == NULL) {
  95                 _E("invalid function arguments");
  96                 return -1;
  97         }
  98
  99         /* close the plugin handle*/
 100         dlclose(handle->plugin_handle);
 101
 102         /* free allocated memory during installtion*/
 103         free(handle);
 104
 105         return 0;
 106 }
 107
 108 int app2ext_usr_get_app_location(const char *pkgid, uid_t uid)
 109 {
 110         FILE *fp = NULL;
 111         char loopback_device[FILENAME_MAX] = { 0, };
 112         char application_path[FILENAME_MAX] = { 0, };
 113         char application_mmc_path[FILENAME_MAX] = { 0, };
 114         char *encoded_id = NULL;
 115
 116         /* validate the function parameter received */
 117         if (pkgid == NULL) {
 118                 _E("invalid func parameters");
 119                 return -1;
 120         }
 121
 122         if (_is_global(uid)) {
 123                 snprintf(application_path, FILENAME_MAX - 1, "%s/%s",
 124                         tzplatform_getenv(TZ_SYS_RW_APP), pkgid);
 125                 snprintf(application_mmc_path, FILENAME_MAX - 1, "%s/%s/.mmc",
 126                         tzplatform_getenv(TZ_SYS_RW_APP), pkgid);
 127         } else {
 128                 tzplatform_set_user(uid);
 129                 snprintf(application_path, FILENAME_MAX - 1, "%s/%s",
 130                         tzplatform_getenv(TZ_USER_APP), pkgid);
 131                 snprintf(application_mmc_path, FILENAME_MAX - 1, "%s/%s/.mmc",
 132                         tzplatform_getenv(TZ_USER_APP), pkgid);
 133                 tzplatform_reset_user();
 134         }
 135         encoded_id = _app2sd_get_encoded_name(pkgid, uid);
 136         if (encoded_id == NULL)
 137                 return -1;
 138
 139         snprintf(loopback_device, FILENAME_MAX - 1, "%s/%s",
 140                 APP2SD_PATH, encoded_id);
 141         free(encoded_id);
 142
 143         /* check whether application is in external memory or not */
 144         fp = fopen(loopback_device, "r");
 145         if (fp != NULL) {
 146                 fclose(fp);
 147                 fp = NULL;
 148                 _D("sd card");
 149                 return APP2EXT_SD_CARD;
 150         }
 151
 152         /* check whether application is in internal or not */
 153         fp = fopen(application_path, "r");
 154         if (fp == NULL) {
 155                 _D("app_dir_path open failed, " \
 156                         "package not installed");
 157                 return APP2EXT_NOT_INSTALLED;
 158         } else {
 159                 fclose(fp);
 160                 /* check whether the application is installed in SD card
 161                  * but SD card is not present
 162                  */
 163                 fp = fopen(application_mmc_path, "r");
 164                 if (fp == NULL) {
 165                         _D("internal mem");
 166                         return APP2EXT_INTERNAL_MEM;
 167                 } else {
 168                         fclose(fp);
 169                         _E("app_mmc_internal_path exists, " \
 170                                 "error mmc status");
 171                         return -1;
 172                 }
 173         }
 174 }
 175
 176 int app2ext_get_app_location(const char *pkgid)
 177 {
 178         int ret = 0;
 179
 180         ret = app2ext_usr_get_app_location(pkgid, getuid());
 181
 182         return ret;
 183 }
 184
 185 int app2ext_usr_enable_external_pkg(const char *pkgid, uid_t uid)
 186 {
 187         FILE *fp = NULL;
 188         app2ext_handle *handle = NULL;
 189         char loopback_device[FILENAME_MAX] = { 0, };
 190         char *encoded_id = NULL;
 191
 192         /* validate the function parameter received */
 193         if (pkgid == NULL) {
 194                 _E("invalid func parameters");
 195                 return -1;
 196         }
 197
 198         encoded_id = _app2sd_get_encoded_name(pkgid, uid);
 199         if (encoded_id == NULL)
 200                 return -1;
 201
 202         snprintf(loopback_device, FILENAME_MAX - 1, "%s/%s",
 203                 APP2SD_PATH, encoded_id);
 204         free(encoded_id);
 205
 206         /* check whether application is in external memory or not */
 207         fp = fopen(loopback_device, "r");
 208         if (fp != NULL) {
 209                 fclose(fp);
 210                 fp = NULL;
 211
 212                 handle = app2ext_init(APP2EXT_SD_CARD);
 213                 if (handle == NULL) {
 214                         _E("app2ext init failed");
 215                         return -1;
 216                 }
 217
 218                 handle->interface.client_usr_enable(pkgid, uid);
 219                 app2ext_deinit(handle);
 220         }
 221
 222         return 0;
 223 }
 224
 225 int app2ext_enable_external_pkg(const char *pkgid)
 226 {
 227         int ret = 0;
 228
 229         ret = app2ext_usr_enable_external_pkg(pkgid, getuid());
 230
 231         return ret;
 232 }
 233
 234 int app2ext_usr_disable_external_pkg(const char *pkgid, uid_t uid)
 235 {
 236         FILE *fp = NULL;
 237         app2ext_handle *handle = NULL;
 238         char loopback_device[FILENAME_MAX] = { 0, };
 239         char *encoded_id = NULL;
 240
 241         /* validate the function parameter received */
 242         if (pkgid == NULL || uid < 0) {
 243                 _E("invalid func parameters");
 244                 return -1;
 245         }
 246
 247         encoded_id = _app2sd_get_encoded_name(pkgid, uid);
 248         if (encoded_id == NULL)
 249                 return -1;
 250
 251         snprintf(loopback_device, FILENAME_MAX - 1, "%s/%s",
 252                 APP2SD_PATH, encoded_id);
 253         free(encoded_id);
 254
 255         /* check whether application is in external memory or not */
 256         fp = fopen(loopback_device, "r");
 257         if (fp != NULL) {
 258                 fclose(fp);
 259                 fp = NULL;
 260
 261                 handle = app2ext_init(APP2EXT_SD_CARD);
 262                 if (handle == NULL) {
 263                         _E("app2ext init failed");
 264                         return -1;
 265                 }
 266
 267                 handle->interface.client_usr_disable(pkgid, uid);
 268                 app2ext_deinit(handle);
 269         }
 270
 271         return 0;
 272 }
 273
 274 int app2ext_disable_external_pkg(const char *pkgid)
 275 {
 276         int ret = 0;
 277
 278         ret = app2ext_usr_disable_external_pkg(pkgid, getuid());
 279
 280         return ret;
 281 }
 282
 283 int app2ext_enable_external_full_pkg(void)
 284 {
 285         int ret = 0;
 286         app2ext_handle *handle = NULL;
 287
 288         if (getuid() >= REGULAR_USER)
 289                 return 0;
 290
 291         handle = app2ext_init(APP2EXT_SD_CARD);
 292         if (handle == NULL) {
 293                 _E("app2ext init failed");
 294                 return -1;
 295         }
 296
 297         ret = handle->interface.client_enable_full_pkg();
 298         if (ret != 0)
 299                 _E("failed to enable entire pkgs");
 300
 301         app2ext_deinit(handle);
 302
 303         return 0;
 304 }
 305
 306 int app2ext_disable_external_full_pkg(void)
 307 {
 308         int ret = 0;
 309         app2ext_handle *handle = NULL;
 310
 311         if (getuid() >= REGULAR_USER)
 312                 return 0;
 313
 314         handle = app2ext_init(APP2EXT_SD_CARD);
 315         if (handle == NULL) {
 316                 _E("app2ext init failed");
 317                 return -1;
 318         }
 319
 320         ret = handle->interface.client_disable_full_pkg();
 321         if (ret != 0)
 322                 _E("failed to disable entire pkgs");
 323
 324         app2ext_deinit(handle);
 325
 326         return 0;
 327 }
 328
 329 int app2ext_usr_force_clean_pkg(const char *pkgid, uid_t uid)
 330 {
 331         app2ext_handle *handle = NULL;
 332
 333         /* validate the function parameter received */
 334         if (pkgid == NULL || uid < 0) {
 335                 _E("invalid func parameters");
 336                 return -1;
 337         }
 338
 339         handle = app2ext_init(APP2EXT_SD_CARD);
 340         if (handle == NULL) {
 341                 _E("app2ext init failed");
 342                 return -1;
 343         }
 344
 345         handle->interface.client_usr_force_clean(pkgid, uid);
 346         app2ext_deinit(handle);
 347
 348         return 0;
 349 }
 350
 351 int app2ext_force_clean_pkg(const char *pkgid)
 352 {
 353         int ret = 0;
 354
 355         ret = app2ext_usr_force_clean_pkg(pkgid, getuid());
 356
 357         return ret;
 358 }