src/monitor/stc-app-lifecycle.c

   1 /*
   2  * Copyright (c) 2017 Samsung Electronics Co., Ltd.
   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 <stdbool.h>
  18 #include <unistd.h>
  19 #include <string.h>
  20 #include <stdlib.h>
  21 #include <stdio.h>
  22 #include <signal.h>
  23 #include <errno.h>
  24 #include <sys/socket.h>
  25 #include <linux/netlink.h>
  26 #include <linux/connector.h>
  27 #include <linux/cn_proc.h>
  28 #include <glib.h>
  29
  30 #include "stc-manager-gdbus.h"
  31 #include "stc-app-lifecycle.h"
  32 #include "helper-procfs.h"
  33
  34 typedef struct {
  35         pid_t pid;
  36 } proc_key_s;
  37
  38 typedef struct {
  39         char cmdline[PROC_NAME_MAX];
  40         char status[PROC_STATUS_CNT][PROC_BUF_MAX];
  41 } proc_value_s;
  42
  43 typedef struct __attribute__ ((aligned(NLMSG_ALIGNTO))) {
  44         struct nlmsghdr nl_hdr;
  45         struct __attribute__ ((__packed__)) {
  46                 struct cn_msg cn_msg;
  47                 enum proc_cn_mcast_op cn_mcast;
  48         };
  49 } nl_connector_msg_s;
  50
  51 typedef struct __attribute__ ((aligned(NLMSG_ALIGNTO))) {
  52         struct nlmsghdr nl_hdr;
  53         struct __attribute__ ((__packed__)) {
  54                 struct cn_msg cn_msg;
  55                 struct proc_event proc_ev;
  56         };
  57 } nl_connector_proc_event_s;
  58
  59 static int nl_connector_sock = -1;
  60 static guint nl_connector_gsource_id = 0;
  61 static GTree *proc_tree;
  62
  63
  64 static gboolean __process_nl_connector_message(GIOChannel *source,
  65                                                GIOCondition condition,
  66                                                gpointer user_data);
  67
  68 static int __proc_tree_key_compare(gconstpointer a, gconstpointer b,
  69                                    gpointer UNUSED user_data)
  70 {
  71         proc_key_s *key_a = (proc_key_s *)a;
  72         proc_key_s *key_b = (proc_key_s *)b;
  73
  74         return key_a->pid - key_b->pid;
  75 }
  76
  77 static void __proc_tree_value_free(gpointer data)
  78 {
  79         proc_value_s *value = (proc_value_s *)data;
  80
  81         FREE(value);
  82 }
  83
  84 static void __proc_tree_key_free(gpointer data)
  85 {
  86         proc_key_s *key = (proc_key_s *)data;
  87
  88         FREE(key);
  89 }
  90
  91 static proc_value_s * __proc_tree_lookup(const proc_key_s *key)
  92 {
  93         proc_value_s *lookup;
  94
  95         if (proc_tree == NULL) {
  96                 STC_LOGE("tree is null");
  97                 return NULL;
  98         }
  99
 100         lookup = g_tree_lookup(proc_tree, key);
 101         return lookup;
 102 }
 103
 104 #if STC_DEBUG_LOG
 105 static gboolean __proc_tree_foreach_print(gpointer key, gpointer value,
 106                                           gpointer data)
 107 {
 108         proc_key_s *proc_key = (proc_key_s *)key;
 109         proc_value_s *proc_value = (proc_value_s *)value;
 110
 111         STC_LOGD("Proc pid [\033[1;33m%d\033[0;m] ppid [\033[1;35m%s\033[0;m] "
 112                 "cmdline [\033[0;34m%s\033[0;m]", proc_key->pid,
 113                 proc_value->status[PROC_STATUS_PPID], proc_value->cmdline);
 114
 115         return FALSE;
 116 }
 117
 118 static void __proc_tree_printall(void)
 119 {
 120         g_tree_foreach(proc_tree, __proc_tree_foreach_print, NULL);
 121 }
 122 #endif
 123
 124 static proc_value_s * __proc_tree_find_parent(proc_value_s *value)
 125 {
 126         proc_value_s *parent = NULL;
 127         proc_value_s *lookup = value;
 128
 129         do {
 130                 proc_key_s key;
 131                 key.pid = atoi(lookup->status[PROC_STATUS_PPID]);
 132                 lookup = __proc_tree_lookup(&key);
 133                 if (lookup != NULL)
 134                         parent = lookup;
 135         } while (lookup);
 136
 137 #if STC_DEBUG_LOG
 138                 if (parent != NULL)
 139                         STC_LOGD("\033[0;35mPARENT\033[0;m: tgid[\033[1;33m%s\033[0;m] pid[%s] "
 140                                 "ppid[\033[1;35m%s\033[0;m] cmdline[\033[0;34m%s\033[0;m] name[%s]",
 141                                 parent->status[PROC_STATUS_TGID], parent->status[PROC_STATUS_PID],
 142                                 parent->status[PROC_STATUS_PPID], parent->cmdline,
 143                                 parent->status[PROC_STATUS_NAME]);
 144 #endif
 145
 146         return parent;
 147 }
 148
 149 static void __proc_tree_add(proc_key_s *key,
 150                             proc_value_s *value)
 151 {
 152         proc_value_s *lookup;
 153         proc_value_s *parent;
 154
 155         if (proc_tree == NULL) {
 156                 STC_LOGE("tree is null");
 157                 return;
 158         }
 159
 160         lookup = g_tree_lookup(proc_tree, key);
 161         if (lookup) {
 162 #if STC_DEBUG_LOG
 163                         STC_LOGD("LOOKUP: tgid[\033[1;33m%s\033[0;m] pid[%s] ppid[\033[1;35m%s\033[0;m] "
 164                                 "cmdline[\033[0;34m%s\033[0;m] name[%s]", lookup->status[PROC_STATUS_TGID],
 165                                 lookup->status[PROC_STATUS_PID], lookup->status[PROC_STATUS_PPID],
 166                                 lookup->cmdline, lookup->status[PROC_STATUS_NAME]);
 167 #endif
 168                 return;
 169         }
 170
 171         STC_LOGD("cmdline [%s] pid[%s] ppid[%s]", value->cmdline,
 172                 value->status[PROC_STATUS_PID], value->status[PROC_STATUS_PPID]);
 173
 174         g_tree_insert(proc_tree, key, value);
 175
 176 #if STC_DEBUG_LOG
 177                 __proc_tree_printall();
 178 #endif
 179
 180         parent = __proc_tree_find_parent(value);
 181         if (parent != NULL)
 182                 stc_manager_app_status_changed(STC_CMD_SET_SERVICE_LAUNCHED, key->pid,
 183                         parent->cmdline, parent->cmdline, STC_APP_TYPE_SERVICE);
 184         else
 185                 stc_manager_app_status_changed(STC_CMD_SET_SERVICE_LAUNCHED, key->pid,
 186                         value->cmdline, value->cmdline, STC_APP_TYPE_SERVICE);
 187 }
 188
 189 static void __proc_tree_remove(const proc_key_s *key)
 190 {
 191         if (proc_tree == NULL) {
 192                 STC_LOGE("tree is null");
 193                 return;
 194         }
 195
 196         stc_manager_app_status_changed(STC_CMD_SET_TERMINATED, key->pid, NULL,
 197                                        NULL, STC_APP_TYPE_NONE);
 198         g_tree_remove(proc_tree, key);
 199
 200 #if STC_DEBUG_LOG
 201                 __proc_tree_printall();
 202 #endif
 203 }
 204
 205 static gboolean __check_excn(char *cmdline)
 206 {
 207         stc_error_e ret = stc_monitor_check_excn_by_cmdline(cmdline);
 208
 209         if (ret == STC_ERROR_NO_DATA)
 210                 return FALSE;
 211         else
 212                 return TRUE;
 213 }
 214
 215 static void __open_nl_connector_sock(void)
 216 {
 217         __STC_LOG_FUNC_ENTER__;
 218         GIOChannel *gio = NULL;
 219
 220         if (nl_connector_sock != -1 &&
 221             nl_connector_gsource_id != 0) {
 222                 STC_LOGE("Socket is already open");
 223                 __STC_LOG_FUNC_EXIT__;
 224                 return;
 225         }
 226
 227         if (nl_connector_sock != -1) {
 228                 close(nl_connector_sock);
 229                 nl_connector_sock = -1;
 230         }
 231
 232         if (nl_connector_gsource_id != 0) {
 233                 g_source_remove(nl_connector_gsource_id);
 234                 nl_connector_gsource_id = 0;
 235         }
 236
 237         nl_connector_sock = create_netlink(NETLINK_CONNECTOR, CN_IDX_PROC);
 238         if (nl_connector_sock == -1) {
 239                 __STC_LOG_FUNC_EXIT__;
 240                 return;
 241         }
 242
 243         gio = g_io_channel_unix_new(nl_connector_sock);
 244         nl_connector_gsource_id =
 245                 g_io_add_watch(gio, G_IO_IN | G_IO_ERR | G_IO_HUP,
 246                                (GIOFunc) __process_nl_connector_message,
 247                                NULL);
 248         g_io_channel_unref(gio);
 249         __STC_LOG_FUNC_EXIT__;
 250 }
 251
 252 static void __close_nl_connector_sock(void)
 253 {
 254         __STC_LOG_FUNC_ENTER__;
 255         if (nl_connector_sock != -1) {
 256                 close(nl_connector_sock);
 257                 nl_connector_sock = -1;
 258         }
 259
 260         if (nl_connector_gsource_id != 0) {
 261                 g_source_remove(nl_connector_gsource_id);
 262                 nl_connector_gsource_id = 0;
 263         }
 264         __STC_LOG_FUNC_EXIT__;
 265 }
 266
 267 static void __reopen_nl_connector_sock(void)
 268 {
 269         __close_nl_connector_sock();
 270         __open_nl_connector_sock();
 271 }
 272
 273 stc_error_e stc_manager_app_status_changed(stc_cmd_type_e cmd,
 274                                            pid_t pid,
 275                                            const gchar *app_id,
 276                                            const gchar *pkg_id,
 277                                            stc_app_type_e app_type)
 278 {
 279         stc_error_e ret = STC_ERROR_NONE;
 280
 281         if (pkg_id && app_id)
 282                 STC_LOGD("cmd [%d] pkgid [%s] appid [%s] pid[%d] type [%d]",
 283                         cmd, pkg_id, app_id, pid, app_type);
 284
 285         switch (cmd) {
 286         case STC_CMD_SET_FOREGRD:
 287         {
 288                 stc_app_key_s app_key;
 289                 stc_app_value_s app_value;
 290                 stc_process_key_s proc_key;
 291                 stc_process_value_s proc_value;
 292
 293                 memset(&app_key, 0, sizeof(stc_app_key_s));
 294                 memset(&app_value, 0, sizeof(stc_app_value_s));
 295                 memset(&proc_key, 0, sizeof(stc_process_key_s));
 296                 memset(&proc_value, 0, sizeof(stc_process_value_s));
 297
 298                 app_key.pkg_id = g_strdup(pkg_id);
 299                 app_key.app_id = g_strdup(app_id);
 300
 301                 app_value.type = app_type;
 302                 app_value.processes = NULL;
 303
 304                 proc_key.pid = pid;
 305
 306                 proc_value.ground = STC_APP_STATE_FOREGROUND;
 307
 308                 stc_monitor_application_add(app_key, app_value);
 309                 stc_monitor_process_add(app_key, proc_key, proc_value);
 310                 stc_monitor_process_update_ground(app_key, proc_key,
 311                                                   STC_APP_STATE_FOREGROUND);
 312
 313                 FREE(app_key.pkg_id);
 314                 FREE(app_key.app_id);
 315                 break;
 316         }
 317         case STC_CMD_SET_BACKGRD:
 318         {
 319                 stc_app_key_s app_key;
 320                 stc_app_value_s app_value;
 321                 stc_process_key_s proc_key;
 322                 stc_process_value_s proc_value;
 323
 324                 memset(&app_key, 0, sizeof(stc_app_key_s));
 325                 memset(&app_value, 0, sizeof(stc_app_value_s));
 326                 memset(&proc_key, 0, sizeof(stc_process_key_s));
 327                 memset(&proc_value, 0, sizeof(stc_process_value_s));
 328
 329                 app_key.pkg_id = g_strdup(pkg_id);
 330                 app_key.app_id = g_strconcat(app_id, STC_BACKGROUND_APP_SUFFIX,
 331                                              NULL);
 332
 333                 app_value.type = app_type;
 334                 app_value.processes = NULL;
 335
 336                 proc_key.pid = pid;
 337
 338                 proc_value.ground = STC_APP_STATE_BACKGROUND;
 339
 340                 stc_monitor_application_add(app_key, app_value);
 341                 stc_monitor_process_add(app_key, proc_key, proc_value);
 342                 stc_monitor_process_update_ground(app_key, proc_key,
 343                                                   STC_APP_STATE_BACKGROUND);
 344
 345                 FREE(app_key.pkg_id);
 346                 FREE(app_key.app_id);
 347                 break;
 348         }
 349         case STC_CMD_SET_SERVICE_LAUNCHED:
 350         {
 351                 stc_app_key_s app_key;
 352                 stc_app_value_s app_value;
 353                 stc_process_key_s proc_key;
 354                 stc_process_value_s proc_value;
 355
 356                 memset(&app_key, 0, sizeof(stc_app_key_s));
 357                 memset(&app_value, 0, sizeof(stc_app_value_s));
 358                 memset(&proc_key, 0, sizeof(stc_process_key_s));
 359                 memset(&proc_value, 0, sizeof(stc_process_value_s));
 360
 361                 app_key.pkg_id = g_strdup(pkg_id);
 362                 app_key.app_id = g_strconcat(app_id, STC_BACKGROUND_APP_SUFFIX,
 363                                              NULL);
 364
 365                 app_value.type = app_type;
 366                 app_value.processes = NULL;
 367
 368                 proc_key.pid = pid;
 369
 370                 /* services will run always in background. */
 371                 proc_value.ground = STC_APP_STATE_BACKGROUND;
 372
 373                 stc_monitor_application_add(app_key, app_value);
 374                 stc_monitor_process_add(app_key, proc_key, proc_value);
 375
 376                 FREE(app_key.pkg_id);
 377                 g_free(app_key.app_id);
 378                 break;
 379         }
 380         case STC_CMD_SET_TERMINATED:
 381         {
 382                 stc_monitor_process_remove(pid);
 383                 break;
 384         }
 385         default:
 386                 STC_LOGE("Unhandled command");
 387                 ret = STC_ERROR_INVALID_PARAMETER;
 388         }
 389
 390         return ret;
 391 }
 392
 393 static void __process_event_fork(int tgid, int pid)
 394 {
 395         char cmdline[PROC_NAME_MAX] = {0, };
 396         char status[PROC_STATUS_CNT][PROC_BUF_MAX];
 397
 398         if (STC_ERROR_NONE == proc_get_cmdline(pid, cmdline) &&
 399             STC_ERROR_NONE == proc_get_status(pid, status)) {
 400
 401                 if (__check_excn(cmdline)) {
 402 #if STC_DEBUG_LOG
 403                                 STC_LOGD("[%s] monitoring is excepted", cmdline);
 404 #endif
 405                         return;
 406                 }
 407
 408                 unsigned int i;
 409                 proc_key_s *key;
 410                 proc_value_s *value;
 411
 412                 key = MALLOC0(proc_key_s, 1);
 413                 if (key == NULL) {
 414                         STC_LOGE("memory allocation failed");
 415                         return;
 416                 }
 417
 418                 value = MALLOC0(proc_value_s, 1);
 419                 if (value == NULL) {
 420                         STC_LOGE("memory allocation failed");
 421                         FREE(key);
 422                         return;
 423                 }
 424
 425                 key->pid = tgid;
 426                 for (i = 0; i < PROC_STATUS_CNT; ++i)
 427                         g_strlcpy(value->status[i], status[i], sizeof(value->status[i]));
 428                 g_strlcpy(value->cmdline, cmdline, sizeof(value->cmdline));
 429
 430 #if STC_DEBUG_LOG
 431                         STC_LOGD("\033[1;34mFORK\033[0;m: tgid[\033[1;33m%d\033[0;m] ppid=[\033[1;35m%s\033[0;m] "
 432                                 "cmdline[\033[0;34m%s\033[0;m] pid[%d]", tgid, status[PROC_STATUS_PPID], cmdline, pid);
 433                         STC_LOGD("STATUS: tgid[%s] pid[%s] ppid[%s] name[%s] state[%s] tracerpid[%s]",
 434                                 status[PROC_STATUS_TGID], status[PROC_STATUS_PID], status[PROC_STATUS_PPID],
 435                                 status[PROC_STATUS_NAME], status[PROC_STATUS_STATE], status[PROC_STATUS_TRACERPID]);
 436 #endif
 437
 438                 __proc_tree_add(key, value);
 439         }
 440 }
 441
 442 static void __process_event_exec(int tgid, int pid)
 443 {
 444         char cmdline[PROC_NAME_MAX] = {0, };
 445         char status[PROC_STATUS_CNT][PROC_BUF_MAX];
 446
 447         if (STC_ERROR_NONE == proc_get_cmdline(pid, cmdline) &&
 448             STC_ERROR_NONE == proc_get_status(pid, status)) {
 449
 450                 if (__check_excn(cmdline)) {
 451 #if STC_DEBUG_LOG
 452                                 STC_LOGD("[%s] monitoring is excepted", cmdline);
 453 #endif
 454                         return;
 455                 }
 456
 457                 unsigned int i;
 458                 proc_key_s *key;
 459                 proc_value_s *value;
 460
 461                 key = MALLOC0(proc_key_s, 1);
 462                 if (key == NULL) {
 463                         STC_LOGE("memory allocation failed");
 464                         return;
 465                 }
 466
 467                 value = MALLOC0(proc_value_s, 1);
 468                 if (value == NULL) {
 469                         STC_LOGE("memory allocation failed");
 470                         FREE(key);
 471                         return;
 472                 }
 473
 474                 key->pid = tgid;
 475                 for (i = 0; i < PROC_STATUS_CNT; ++i)
 476                         g_strlcpy(value->status[i], status[i], sizeof(value->status[i]));
 477                 g_strlcpy(value->cmdline, cmdline, sizeof(value->cmdline));
 478
 479 #if STC_DEBUG_LOG
 480                         STC_LOGD("\033[1;32mEXEC\033[0;m: tgid[\033[1;33m%d\033[0;m] ppid=[\033[1;35m%s\033[0;m] "
 481                                 "cmdline[\033[0;34m%s\033[0;m] pid[%d]", tgid, status[PROC_STATUS_PPID], cmdline, pid);
 482                         STC_LOGD("STATUS: tgid[%s] pid[%s] ppid[%s] name[%s] state[%s] tracerpid[%s]",
 483                                 status[PROC_STATUS_TGID], status[PROC_STATUS_PID], status[PROC_STATUS_PPID],
 484                                 status[PROC_STATUS_NAME], status[PROC_STATUS_STATE], status[PROC_STATUS_TRACERPID]);
 485 #endif
 486
 487                 __proc_tree_add(key, value);
 488         }
 489 }
 490
 491 static void __process_event_exit(int tgid, int pid, int exit_code)
 492 {
 493         proc_key_s key;
 494         proc_value_s *lookup;
 495
 496         if (tgid != pid)
 497                 return;
 498
 499         key.pid = tgid;
 500         lookup = __proc_tree_lookup(&key);
 501         if (lookup == NULL) /* unmonitored process */
 502                 return;
 503
 504 #if STC_DEBUG_LOG
 505                 STC_LOGD("\033[1;31mEXIT\033[0;m: tgid[\033[1;33m%d\033[0;m] "
 506                         "pid[%d] exitcode[\033[0;31m%d\033[0;m]", tgid, pid, exit_code);
 507 #endif
 508
 509         __proc_tree_remove(&key);
 510 }
 511
 512 static gboolean __process_nl_connector_message(GIOChannel *source,
 513                                                GIOCondition condition,
 514                                                gpointer user_data)
 515 {
 516         int ret;
 517         int sock = g_io_channel_unix_get_fd(source);
 518         nl_connector_proc_event_s msg;
 519
 520         if ((condition & G_IO_ERR) || (condition & G_IO_HUP) ||
 521             (condition & G_IO_NVAL)) {
 522                 /* G_IO_ERR/G_IO_HUP/G_IO_NVAL received */
 523
 524                 STC_LOGE("Netlink Connector socket received G_IO event, closing"
 525                          " socket. G_IO_ERR [%d], G_IO_HUP [%d], G_IO_NVAL [%s]",
 526                          (condition & G_IO_ERR), (condition & G_IO_HUP),
 527                          (condition & G_IO_NVAL));
 528                 __reopen_nl_connector_sock();
 529                 __STC_LOG_FUNC_EXIT__;
 530                 return FALSE;
 531         }
 532
 533         memset(&msg, 0, sizeof(nl_connector_proc_event_s));
 534
 535         ret = read(sock, &msg, sizeof(nl_connector_proc_event_s));
 536         if (ret == 0) {
 537                 __STC_LOG_FUNC_EXIT__;
 538                 return TRUE;
 539         }
 540
 541         switch (msg.proc_ev.what) {
 542         case PROC_EVENT_FORK:
 543                 __process_event_fork(msg.proc_ev.event_data.fork.child_tgid,
 544                                      msg.proc_ev.event_data.fork.child_pid);
 545                 break;
 546         case PROC_EVENT_EXEC:
 547                 __process_event_exec(msg.proc_ev.event_data.exec.process_tgid,
 548                                      msg.proc_ev.event_data.exec.process_pid);
 549                 break;
 550         case PROC_EVENT_EXIT:
 551                 __process_event_exit(msg.proc_ev.event_data.exit.process_tgid,
 552                                      msg.proc_ev.event_data.exit.process_pid,
 553                                      msg.proc_ev.event_data.exit.exit_code);
 554                 break;
 555         default:
 556                 ; /* Do nothing */
 557         }
 558
 559         return TRUE;
 560 }
 561
 562 static int __subscribe_proc_events(void)
 563 {
 564         __STC_LOG_FUNC_ENTER__;
 565         nl_connector_msg_s msg;
 566         int ret;
 567         int sock = nl_connector_sock;
 568
 569         if (sock == -1) {
 570                 __STC_LOG_FUNC_EXIT__;
 571                 return -1;
 572         }
 573
 574         memset(&msg, 0, sizeof(nl_connector_msg_s));
 575
 576         msg.nl_hdr.nlmsg_len = sizeof(nl_connector_msg_s);
 577         msg.nl_hdr.nlmsg_pid = getpid();
 578         msg.nl_hdr.nlmsg_type = NLMSG_DONE;
 579
 580         msg.cn_msg.id.idx = CN_IDX_PROC;
 581         msg.cn_msg.id.val = CN_VAL_PROC;
 582         msg.cn_msg.len = sizeof(enum proc_cn_mcast_op);
 583
 584         msg.cn_mcast = PROC_CN_MCAST_LISTEN;
 585
 586         ret = send(sock, &msg, sizeof(nl_connector_msg_s), 0);
 587         if (ret == -1) {
 588                 STC_LOGE("Error sending netlink connector message");
 589                 __STC_LOG_FUNC_EXIT__;
 590                 return -1;
 591         }
 592
 593         __STC_LOG_FUNC_EXIT__;
 594         return 0;
 595 }
 596
 597 static int __unsubscribe_proc_events(void)
 598 {
 599         __STC_LOG_FUNC_ENTER__;
 600         nl_connector_msg_s msg;
 601         int ret;
 602         int sock = nl_connector_sock;
 603
 604         if (sock == -1) {
 605                 __STC_LOG_FUNC_EXIT__;
 606                 return -1;
 607         }
 608
 609         memset(&msg, 0, sizeof(nl_connector_msg_s));
 610
 611         msg.nl_hdr.nlmsg_len = sizeof(nl_connector_msg_s);
 612         msg.nl_hdr.nlmsg_pid = getpid();
 613         msg.nl_hdr.nlmsg_type = NLMSG_DONE;
 614
 615         msg.cn_msg.id.idx = CN_IDX_PROC;
 616         msg.cn_msg.id.val = CN_VAL_PROC;
 617         msg.cn_msg.len = sizeof(enum proc_cn_mcast_op);
 618
 619         msg.cn_mcast = PROC_CN_MCAST_IGNORE;
 620
 621         ret = send(sock, &msg, sizeof(nl_connector_msg_s), 0);
 622         if (ret == -1) {
 623                 STC_LOGE("Error sending netlink connector message");
 624                 __STC_LOG_FUNC_EXIT__;
 625                 return -1;
 626         }
 627
 628         __STC_LOG_FUNC_EXIT__;
 629         return 0;
 630 }
 631
 632 void stc_app_lifecycle_monitor_init(void)
 633 {
 634         __STC_LOG_FUNC_ENTER__;
 635
 636         proc_tree = g_tree_new_full(__proc_tree_key_compare, NULL,
 637                                     __proc_tree_key_free,
 638                                     __proc_tree_value_free);
 639
 640         /* TODO: Fill proc tree with current procfs state */
 641
 642         __open_nl_connector_sock();
 643         __subscribe_proc_events();
 644         __STC_LOG_FUNC_EXIT__;
 645 }
 646
 647 void stc_app_lifecycle_monitor_deinit(void)
 648 {
 649         __STC_LOG_FUNC_ENTER__;
 650
 651         if (nl_connector_sock == -1) {
 652                 STC_LOGE("socket already closed");
 653                 return;
 654         }
 655
 656         __unsubscribe_proc_events();
 657         __close_nl_connector_sock();
 658
 659         g_tree_destroy(proc_tree);
 660         proc_tree = NULL;
 661
 662         __STC_LOG_FUNC_EXIT__;
 663 }