cel/cel_pgsql.c

   1 /*
   2  * Asterisk -- An open source telephony toolkit.
   3  *
   4  * Copyright (C) 2008
   5  *
   6  * Steve Murphy - adapted to CEL, from:
   7  * Matthew D. Hardeman <mhardemn@papersoft.com>
   8  * Adapted from the MySQL CDR logger originally by James Sharp
   9  *
  10  * Modified April, 2007; Dec, 2008
  11  * Steve Murphy <murf@digium.com>
  12
  13  * Modified September 2003
  14  * Matthew D. Hardeman <mhardemn@papersoft.com>
  15  *
  16  * See http://www.asterisk.org for more information about
  17  * the Asterisk project. Please do not directly contact
  18  * any of the maintainers of this project for assistance;
  19  * the project provides a web site, mailing lists and IRC
  20  * channels for your use.
  21  *
  22  * This program is free software, distributed under the terms of
  23  * the GNU General Public License Version 2. See the LICENSE file
  24  * at the top of the source tree.
  25  */
  26
  27 /*! \file
  28  *
  29  * \brief PostgreSQL CEL logger
  30  *
  31  * \author Steve Murphy <murf@digium.com>
  32  * \extref PostgreSQL http://www.postgresql.org/
  33  *
  34  * See also
  35  * \arg \ref Config_cel
  36  * \extref PostgreSQL http://www.postgresql.org/
  37  * \ingroup cel_drivers
  38  */
  39
  40 /*** MODULEINFO
  41         <depend>pgsql</depend>
  42  ***/
  43
  44 #include "asterisk.h"
  45
  46 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
  47
  48 #include <libpq-fe.h>
  49
  50 #include "asterisk/config.h"
  51 #include "asterisk/options.h"
  52 #include "asterisk/channel.h"
  53 #include "asterisk/cel.h"
  54 #include "asterisk/module.h"
  55 #include "asterisk/logger.h"
  56 #include "asterisk.h"
  57
  58 #define DATE_FORMAT "%Y-%m-%d %T"
  59
  60 static char *config = "cel_pgsql.conf";
  61 static char *pghostname = NULL, *pgdbname = NULL, *pgdbuser = NULL, *pgpassword = NULL, *pgdbport = NULL, *table = NULL;
  62 static int connected = 0;
  63 static int maxsize = 512, maxsize2 = 512;
  64
  65 AST_MUTEX_DEFINE_STATIC(pgsql_lock);
  66
  67 static PGconn   *conn = NULL;
  68 static PGresult *result = NULL;
  69 static struct ast_event_sub *event_sub = NULL;
  70
  71 struct columns {
  72         char *name;
  73         char *type;
  74         int len;
  75         unsigned int notnull:1;
  76         unsigned int hasdefault:1;
  77         AST_RWLIST_ENTRY(columns) list;
  78 };
  79
  80 static AST_RWLIST_HEAD_STATIC(psql_columns, columns);
  81
  82 #define LENGTHEN_BUF1(size) \
  83         do { \
  84                 /* Lengthen buffer, if necessary */ \
  85                 if (ast_str_strlen(sql) + size + 1 > ast_str_size(sql)) { \
  86                         if (ast_str_make_space(&sql, ((ast_str_size(sql) + size + 3) / 512 + 1) * 512) != 0) { \
  87                                 ast_log(LOG_ERROR, "Unable to allocate sufficient memory.  Insert CDR failed.\n"); \
  88                                 ast_free(sql); \
  89                                 ast_free(sql2); \
  90                                 AST_RWLIST_UNLOCK(&psql_columns); \
  91                                 return; \
  92                         } \
  93                 } \
  94         } while (0)
  95
  96 #define LENGTHEN_BUF2(size) \
  97         do { \
  98                 if (ast_str_strlen(sql2) + size + 1 > ast_str_size(sql2)) { \
  99                         if (ast_str_make_space(&sql2, ((ast_str_size(sql2) + size + 3) / 512 + 1) * 512) != 0) { \
 100                                 ast_log(LOG_ERROR, "Unable to allocate sufficient memory.  Insert CDR failed.\n"); \
 101                                 ast_free(sql); \
 102                                 ast_free(sql2); \
 103                                 AST_RWLIST_UNLOCK(&psql_columns); \
 104                                 return; \
 105                         } \
 106                 } \
 107         } while (0)
 108
 109 static void pgsql_log(const struct ast_event *event, void *userdata)
 110 {
 111         struct ast_tm tm;
 112         char timestr[128];
 113         char *pgerror;
 114         struct ast_cel_event_record record = {
 115                 .version = AST_CEL_EVENT_RECORD_VERSION,
 116         };
 117
 118         if (ast_cel_fill_record(event, &record)) {
 119                 return;
 120         }
 121
 122         ast_mutex_lock(&pgsql_lock);
 123
 124         ast_localtime(&record.event_time, &tm, NULL);
 125         ast_strftime(timestr, sizeof(timestr), DATE_FORMAT, &tm);
 126
 127         if ((!connected) && pghostname && pgdbuser && pgpassword && pgdbname) {
 128                 conn = PQsetdbLogin(pghostname, pgdbport, NULL, NULL, pgdbname, pgdbuser, pgpassword);
 129                 if (PQstatus(conn) != CONNECTION_BAD) {
 130                         connected = 1;
 131                 } else {
 132                         pgerror = PQerrorMessage(conn);
 133                         ast_log(LOG_ERROR, "cel_pgsql: Unable to connect to database server %s.  Calls will not be logged!\n", pghostname);
 134                         ast_log(LOG_ERROR, "cel_pgsql: Reason: %s\n", pgerror);
 135                         PQfinish(conn);
 136                         conn = NULL;
 137                 }
 138         }
 139         if (connected) {
 140                 struct columns *cur;
 141                 struct ast_str *sql = ast_str_create(maxsize), *sql2 = ast_str_create(maxsize2);
 142                 char buf[257], escapebuf[513];
 143                 const char *value;
 144                 int first = 1;
 145
 146                 if (!sql || !sql2) {
 147                         if (sql) {
 148                                 ast_free(sql);
 149                         }
 150                         if (sql2) {
 151                                 ast_free(sql2);
 152                         }
 153                         return;
 154                 }
 155
 156                 ast_str_set(&sql, 0, "INSERT INTO %s (", table);
 157                 ast_str_set(&sql2, 0, " VALUES (");
 158
 159 #define SEP (first ? "" : ",")
 160
 161                 AST_RWLIST_RDLOCK(&psql_columns);
 162                 AST_RWLIST_TRAVERSE(&psql_columns, cur, list) {
 163                         LENGTHEN_BUF1(strlen(cur->name) + 2);
 164                         ast_str_append(&sql, 0, "%s\"%s\"", first ? "" : ",", cur->name);
 165
 166                         if (strcmp(cur->name, "eventtime") == 0) {
 167                                 if (strncmp(cur->type, "int", 3) == 0) {
 168                                         LENGTHEN_BUF2(13);
 169                                         ast_str_append(&sql2, 0, "%s%ld", SEP, record.event_time.tv_sec);
 170                                 } else if (strncmp(cur->type, "float", 5) == 0) {
 171                                         LENGTHEN_BUF2(31);
 172                                         ast_str_append(&sql2, 0, "%s%f",
 173                                                 SEP,
 174                                                 (double) record.event_time.tv_sec +
 175                                                 (double) record.event_time.tv_usec / 1000000.0);
 176                                 } else {
 177                                         /* char, hopefully */
 178                                         LENGTHEN_BUF2(31);
 179                                         ast_localtime(&record.event_time, &tm, NULL);
 180                                         ast_strftime(buf, sizeof(buf), DATE_FORMAT, &tm);
 181                                         ast_str_append(&sql2, 0, "%s'%s'", SEP, buf);
 182                                 }
 183                         } else if (strcmp(cur->name, "eventtype") == 0) {
 184                                 if (cur->type[0] == 'i') {
 185                                         /* Get integer, no need to escape anything */
 186                                         LENGTHEN_BUF2(5);
 187                                         ast_str_append(&sql2, 0, "%s%d", SEP, (int) record.event_type);
 188                                 } else if (strncmp(cur->type, "float", 5) == 0) {
 189                                         LENGTHEN_BUF2(31);
 190                                         ast_str_append(&sql2, 0, "%s%f", SEP, (double) record.event_type);
 191                                 } else {
 192                                         /* Char field, probably */
 193                                         LENGTHEN_BUF2(strlen(record.event_name) + 1);
 194                                         ast_str_append(&sql2, 0, "%s'%s'", SEP, record.event_name);
 195                                 }
 196                         } else if (strcmp(cur->name, "amaflags") == 0) {
 197                                 if (strncmp(cur->type, "int", 3) == 0) {
 198                                         /* Integer, no need to escape anything */
 199                                         LENGTHEN_BUF2(13);
 200                                         ast_str_append(&sql2, 0, "%s%d", SEP, record.amaflag);
 201                                 } else {
 202                                         /* Although this is a char field, there are no special characters in the values for these fields */
 203                                         LENGTHEN_BUF2(31);
 204                                         ast_str_append(&sql2, 0, "%s'%d'", SEP, record.amaflag);
 205                                 }
 206                         } else {
 207                                 /* Arbitrary field, could be anything */
 208                                 if (strcmp(cur->name, "userdeftype") == 0) {
 209                                         value = record.user_defined_name;
 210                                 } else if (strcmp(cur->name, "cid_name") == 0) {
 211                                         value = record.caller_id_name;
 212                                 } else if (strcmp(cur->name, "cid_num") == 0) {
 213                                         value = record.caller_id_num;
 214                                 } else if (strcmp(cur->name, "cid_ani") == 0) {
 215                                         value = record.caller_id_ani;
 216                                 } else if (strcmp(cur->name, "cid_rdnis") == 0) {
 217                                         value = record.caller_id_rdnis;
 218                                 } else if (strcmp(cur->name, "cid_dnid") == 0) {
 219                                         value = record.caller_id_dnid;
 220                                 } else if (strcmp(cur->name, "exten") == 0) {
 221                                         value = record.extension;
 222                                 } else if (strcmp(cur->name, "context") == 0) {
 223                                         value = record.context;
 224                                 } else if (strcmp(cur->name, "channame") == 0) {
 225                                         value = record.channel_name;
 226                                 } else if (strcmp(cur->name, "appname") == 0) {
 227                                         value = record.application_name;
 228                                 } else if (strcmp(cur->name, "appdata") == 0) {
 229                                         value = record.application_data;
 230                                 } else if (strcmp(cur->name, "accountcode") == 0) {
 231                                         value = record.account_code;
 232                                 } else if (strcmp(cur->name, "peeraccount") == 0) {
 233                                         value = record.peer_account;
 234                                 } else if (strcmp(cur->name, "uniqueid") == 0) {
 235                                         value = record.unique_id;
 236                                 } else if (strcmp(cur->name, "linkedid") == 0) {
 237                                         value = record.linked_id;
 238                                 } else if (strcmp(cur->name, "userfield") == 0) {
 239                                         value = record.user_field;
 240                                 } else if (strcmp(cur->name, "peer") == 0) {
 241                                         value = record.peer;
 242                                 } else {
 243                                         value = "";
 244                                 }
 245                                 if (strncmp(cur->type, "int", 3) == 0) {
 246                                         long long whatever;
 247                                         if (value && sscanf(value, "%30lld", &whatever) == 1) {
 248                                                 LENGTHEN_BUF2(26);
 249                                                 ast_str_append(&sql2, 0, "%s%lld", SEP, whatever);
 250                                         } else {
 251                                                 LENGTHEN_BUF2(2);
 252                                                 ast_str_append(&sql2, 0, "%s0", SEP);
 253                                         }
 254                                 } else if (strncmp(cur->type, "float", 5) == 0) {
 255                                         long double whatever;
 256                                         if (value && sscanf(value, "%30Lf", &whatever) == 1) {
 257                                                 LENGTHEN_BUF2(51);
 258                                                 ast_str_append(&sql2, 0, "%s%30Lf", SEP, whatever);
 259                                         } else {
 260                                                 LENGTHEN_BUF2(2);
 261                                                 ast_str_append(&sql2, 0, "%s0", SEP);
 262                                         }
 263                                         /* XXX Might want to handle dates, times, and other misc fields here XXX */
 264                                 } else {
 265                                         if (value) {
 266                                                 PQescapeStringConn(conn, escapebuf, value, strlen(value), NULL);
 267                                         } else {
 268                                                 escapebuf[0] = '\0';
 269                                         }
 270                                         LENGTHEN_BUF2(strlen(escapebuf) + 3);
 271                                         ast_str_append(&sql2, 0, "%s'%s'", SEP, escapebuf);
 272                                 }
 273                         }
 274                         first = 0;
 275                 }
 276                 AST_RWLIST_UNLOCK(&psql_columns);
 277                 LENGTHEN_BUF1(ast_str_strlen(sql2) + 2);
 278                 ast_str_append(&sql, 0, ")%s)", ast_str_buffer(sql2));
 279                 ast_verb(11, "[%s]\n", ast_str_buffer(sql));
 280
 281                 ast_debug(2, "inserting a CEL record.\n");
 282                 /* Test to be sure we're still connected... */
 283                 /* If we're connected, and connection is working, good. */
 284                 /* Otherwise, attempt reconnect.  If it fails... sorry... */
 285                 if (PQstatus(conn) == CONNECTION_OK) {
 286                         connected = 1;
 287                 } else {
 288                         ast_log(LOG_ERROR, "Connection was lost... attempting to reconnect.\n");
 289                         PQreset(conn);
 290                         if (PQstatus(conn) == CONNECTION_OK) {
 291                                 ast_log(LOG_ERROR, "Connection reestablished.\n");
 292                                 connected = 1;
 293                         } else {
 294                                 pgerror = PQerrorMessage(conn);
 295                                 ast_log(LOG_ERROR, "Unable to reconnect to database server %s. Calls will not be logged!\n", pghostname);
 296                                 ast_log(LOG_ERROR, "Reason: %s\n", pgerror);
 297                                 PQfinish(conn);
 298                                 conn = NULL;
 299                                 connected = 0;
 300                                 ast_mutex_unlock(&pgsql_lock);
 301                                 ast_free(sql);
 302                                 ast_free(sql2);
 303                                 return;
 304                         }
 305                 }
 306                 result = PQexec(conn, ast_str_buffer(sql));
 307                 if (PQresultStatus(result) != PGRES_COMMAND_OK) {
 308                         pgerror = PQresultErrorMessage(result);
 309                         ast_log(LOG_ERROR, "Failed to insert call detail record into database!\n");
 310                         ast_log(LOG_ERROR, "Reason: %s\n", pgerror);
 311                         ast_log(LOG_ERROR, "Connection may have been lost... attempting to reconnect.\n");
 312                         PQreset(conn);
 313                         if (PQstatus(conn) == CONNECTION_OK) {
 314                                 ast_log(LOG_ERROR, "Connection reestablished.\n");
 315                                 connected = 1;
 316                                 PQclear(result);
 317                                 result = PQexec(conn, ast_str_buffer(sql));
 318                                 if (PQresultStatus(result) != PGRES_COMMAND_OK) {
 319                                         pgerror = PQresultErrorMessage(result);
 320                                         ast_log(LOG_ERROR, "HARD ERROR!  Attempted reconnection failed.  DROPPING CALL RECORD!\n");
 321                                         ast_log(LOG_ERROR, "Reason: %s\n", pgerror);
 322                                 }
 323                         }
 324                         ast_mutex_unlock(&pgsql_lock);
 325                         PQclear(result);
 326                         ast_free(sql);
 327                         ast_free(sql2);
 328                         return;
 329                 }
 330                 ast_mutex_unlock(&pgsql_lock);
 331         }
 332 }
 333
 334 static int my_unload_module(void)
 335 {
 336         struct columns *current;
 337         if (event_sub) {
 338                 event_sub = ast_event_unsubscribe(event_sub);
 339         }
 340         if (conn) {
 341                 PQfinish(conn);
 342         }
 343         if (pghostname) {
 344                 ast_free(pghostname);
 345         }
 346         if (pgdbname) {
 347                 ast_free(pgdbname);
 348         }
 349         if (pgdbuser) {
 350                 ast_free(pgdbuser);
 351         }
 352         if (pgpassword) {
 353                 ast_free(pgpassword);
 354         }
 355         if (pgdbport) {
 356                 ast_free(pgdbport);
 357         }
 358         if (table) {
 359                 ast_free(table);
 360         }
 361         AST_RWLIST_WRLOCK(&psql_columns);
 362         while ((current = AST_RWLIST_REMOVE_HEAD(&psql_columns, list))) {
 363                 ast_free(current);
 364         }
 365         AST_RWLIST_UNLOCK(&psql_columns);
 366         return 0;
 367 }
 368
 369 static int unload_module(void)
 370 {
 371         return my_unload_module();
 372 }
 373
 374 static int process_my_load_module(struct ast_config *cfg)
 375 {
 376         struct ast_variable *var;
 377         char *pgerror;
 378         const char *tmp;
 379         PGresult *result;
 380         struct columns *cur;
 381
 382         if (!(var = ast_variable_browse(cfg, "global"))) {
 383                 ast_log(LOG_WARNING,"CEL pgsql config file missing global section.\n");
 384                 return AST_MODULE_LOAD_DECLINE;
 385         }
 386         if (!(tmp = ast_variable_retrieve(cfg,"global","hostname"))) {
 387                 ast_log(LOG_WARNING,"PostgreSQL server hostname not specified.  Assuming unix socket connection\n");
 388                 tmp = "";       /* connect via UNIX-socket by default */
 389         }
 390         if (pghostname)
 391                 ast_free(pghostname);
 392         if (!(pghostname = ast_strdup(tmp))) {
 393                 ast_log(LOG_WARNING,"PostgreSQL Ran out of memory copying host info\n");
 394                 return AST_MODULE_LOAD_DECLINE;
 395         }
 396         if (!(tmp = ast_variable_retrieve(cfg, "global", "dbname"))) {
 397                 ast_log(LOG_WARNING,"PostgreSQL database not specified.  Assuming asterisk\n");
 398                 tmp = "asteriskceldb";
 399         }
 400         if (pgdbname)
 401                 ast_free(pgdbname);
 402         if (!(pgdbname = ast_strdup(tmp))) {
 403                 ast_log(LOG_WARNING,"PostgreSQL Ran out of memory copying dbname info\n");
 404                 return AST_MODULE_LOAD_DECLINE;
 405         }
 406         if (!(tmp = ast_variable_retrieve(cfg, "global", "user"))) {
 407                 ast_log(LOG_WARNING,"PostgreSQL database user not specified.  Assuming asterisk\n");
 408                 tmp = "asterisk";
 409         }
 410         if (pgdbuser)
 411                 ast_free(pgdbuser);
 412         if (!(pgdbuser = ast_strdup(tmp))) {
 413                 ast_log(LOG_WARNING,"PostgreSQL Ran out of memory copying user info\n");
 414                 return AST_MODULE_LOAD_DECLINE;
 415         }
 416         if (!(tmp = ast_variable_retrieve(cfg, "global", "password"))) {
 417                 ast_log(LOG_WARNING, "PostgreSQL database password not specified.  Assuming blank\n");
 418                 tmp = "";
 419         }
 420         if (pgpassword)
 421                 ast_free(pgpassword);
 422         if (!(pgpassword = ast_strdup(tmp))) {
 423                 ast_log(LOG_WARNING,"PostgreSQL Ran out of memory copying password info\n");
 424                 return AST_MODULE_LOAD_DECLINE;
 425         }
 426         if (!(tmp = ast_variable_retrieve(cfg,"global","port"))) {
 427                 ast_log(LOG_WARNING,"PostgreSQL database port not specified.  Using default 5432.\n");
 428                 tmp = "5432";
 429         }
 430         if (pgdbport)
 431                 ast_free(pgdbport);
 432         if (!(pgdbport = ast_strdup(tmp))) {
 433                 ast_log(LOG_WARNING,"PostgreSQL Ran out of memory copying port info\n");
 434                 return AST_MODULE_LOAD_DECLINE;
 435         }
 436         if (!(tmp = ast_variable_retrieve(cfg, "global", "table"))) {
 437                 ast_log(LOG_WARNING,"CEL table not specified.  Assuming cel\n");
 438                 tmp = "cel";
 439         }
 440         if (table)
 441                 ast_free(table);
 442         if (!(table = ast_strdup(tmp))) {
 443                 return AST_MODULE_LOAD_DECLINE;
 444         }
 445         if (option_debug) {
 446                 if (ast_strlen_zero(pghostname)) {
 447                         ast_debug(3, "cel_pgsql: using default unix socket\n");
 448                 } else {
 449                         ast_debug(3, "cel_pgsql: got hostname of %s\n", pghostname);
 450                 }
 451                 ast_debug(3, "cel_pgsql: got port of %s\n", pgdbport);
 452                 ast_debug(3, "cel_pgsql: got user of %s\n", pgdbuser);
 453                 ast_debug(3, "cel_pgsql: got dbname of %s\n", pgdbname);
 454                 ast_debug(3, "cel_pgsql: got password of %s\n", pgpassword);
 455                 ast_debug(3, "cel_pgsql: got sql table name of %s\n", table);
 456         }
 457
 458         conn = PQsetdbLogin(pghostname, pgdbport, NULL, NULL, pgdbname, pgdbuser, pgpassword);
 459         if (PQstatus(conn) != CONNECTION_BAD) {
 460                 char sqlcmd[512];
 461                 char *fname, *ftype, *flen, *fnotnull, *fdef;
 462                 char *tableptr;
 463                 int i, rows;
 464
 465                 ast_debug(1, "Successfully connected to PostgreSQL database.\n");
 466                 connected = 1;
 467
 468                 /* Remove any schema name from the table */
 469                 if ((tableptr = strrchr(table, '.'))) {
 470                         tableptr++;
 471                 } else {
 472                         tableptr = table;
 473                 }
 474
 475                 /* Query the columns */
 476                 snprintf(sqlcmd, sizeof(sqlcmd), "select a.attname, t.typname, a.attlen, a.attnotnull, d.adsrc from pg_class c, pg_type t, pg_attribute a left outer join pg_attrdef d on a.atthasdef and d.adrelid = a.attrelid and d.adnum = a.attnum where c.oid = a.attrelid and a.atttypid = t.oid and (a.attnum > 0) and c.relname = '%s' order by c.relname, attnum", tableptr);
 477                 result = PQexec(conn, sqlcmd);
 478                 if (PQresultStatus(result) != PGRES_TUPLES_OK) {
 479                         pgerror = PQresultErrorMessage(result);
 480                         ast_log(LOG_ERROR, "Failed to query database columns: %s\n", pgerror);
 481                         PQclear(result);
 482                         unload_module();
 483                         return AST_MODULE_LOAD_DECLINE;
 484                 }
 485
 486                 rows = PQntuples(result);
 487                 for (i = 0; i < rows; i++) {
 488                         fname = PQgetvalue(result, i, 0);
 489                         ftype = PQgetvalue(result, i, 1);
 490                         flen = PQgetvalue(result, i, 2);
 491                         fnotnull = PQgetvalue(result, i, 3);
 492                         fdef = PQgetvalue(result, i, 4);
 493                         ast_verb(4, "Found column '%s' of type '%s'\n", fname, ftype);
 494                         cur = ast_calloc(1, sizeof(*cur) + strlen(fname) + strlen(ftype) + 2);
 495                         if (cur) {
 496                                 sscanf(flen, "%30d", &cur->len);
 497                                 cur->name = (char *)cur + sizeof(*cur);
 498                                 cur->type = (char *)cur + sizeof(*cur) + strlen(fname) + 1;
 499                                 strcpy(cur->name, fname);
 500                                 strcpy(cur->type, ftype);
 501                                 if (*fnotnull == 't') {
 502                                         cur->notnull = 1;
 503                                 } else {
 504                                         cur->notnull = 0;
 505                                 }
 506                                 if (!ast_strlen_zero(fdef)) {
 507                                         cur->hasdefault = 1;
 508                                 } else {
 509                                         cur->hasdefault = 0;
 510                                 }
 511                                 AST_RWLIST_INSERT_TAIL(&psql_columns, cur, list);
 512                         }
 513                 }
 514                 PQclear(result);
 515         } else {
 516                 pgerror = PQerrorMessage(conn);
 517                 ast_log(LOG_ERROR, "cel_pgsql: Unable to connect to database server %s.  CALLS WILL NOT BE LOGGED!!\n", pghostname);
 518                 ast_log(LOG_ERROR, "cel_pgsql: Reason: %s\n", pgerror);
 519                 connected = 0;
 520         }
 521         return AST_MODULE_LOAD_SUCCESS;
 522 }
 523
 524 static int my_load_module(int reload)
 525 {
 526         struct ast_config *cfg;
 527         int res;
 528         struct ast_flags config_flags = { reload ? CONFIG_FLAG_FILEUNCHANGED : 0 };
 529
 530         if ((cfg = ast_config_load(config, config_flags)) == NULL || cfg == CONFIG_STATUS_FILEINVALID) {
 531                 ast_log(LOG_WARNING, "Unable to load config for PostgreSQL CEL's: %s\n", config);
 532                 return AST_MODULE_LOAD_DECLINE;
 533         } else if (cfg == CONFIG_STATUS_FILEUNCHANGED) {
 534                 return AST_MODULE_LOAD_SUCCESS;
 535         }
 536
 537         res = process_my_load_module(cfg);
 538         ast_config_destroy(cfg);
 539
 540         event_sub = ast_event_subscribe(AST_EVENT_CEL, pgsql_log, "CEL PGSQL backend", NULL, AST_EVENT_IE_END);
 541
 542         if (!event_sub) {
 543                 ast_log(LOG_WARNING, "Unable to subscribe to CEL events for pgsql\n");
 544                 return AST_MODULE_LOAD_DECLINE;
 545         }
 546
 547         return AST_MODULE_LOAD_SUCCESS;
 548 }
 549
 550 static int load_module(void)
 551 {
 552         return my_load_module(0);
 553 }
 554
 555 static int reload(void)
 556 {
 557         my_unload_module();
 558         return my_load_module(1);
 559 }
 560
 561 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "PostgreSQL CEL Backend",
 562         .load = load_module,
 563         .unload = unload_module,
 564         .reload = reload,
 565 );