citadel/serv_extensions.c

   1 /*
   2  * Citadel Dynamic Loading Module
   3  * Written by Brian Costello <btx@calyx.net>
   4  *
   5  * Copyright (c) 1987-2011 by the citadel.org team
   6  *
   7  * This program is open source software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 3 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20  */
  21
  22 #include "sysdep.h"
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <unistd.h>
  26 #include <sys/types.h>
  27 #include <dirent.h>
  28 #include <string.h>
  29 #include <limits.h>
  30 #include <ctype.h>
  31 #include <syslog.h>
  32 #include <libcitadel.h>
  33 #include "citadel.h"
  34 #include "server.h"
  35 #include "serv_extensions.h"
  36 #include "sysdep_decls.h"
  37 #include "msgbase.h"
  38 #include "config.h"
  39
  40 #include "modules/crypto/serv_crypto.h" /* Needed until a universal crypto startup hook is implimented for CtdlStartTLS */
  41
  42 #include "ctdl_module.h"
  43
  44 #ifndef HAVE_SNPRINTF
  45 #include <stdarg.h>
  46 #include "snprintf.h"
  47 #endif
  48
  49 int DebugModules = 0;
  50
  51 /*
  52  * Structure defentitions for hook tables
  53  */
  54
  55 typedef struct __LogDebugEntry {
  56         CtdlDbgFunction F;
  57         const char *Name;
  58         long Len;
  59         const int *LogP;
  60 } LogDebugEntry;
  61 HashList *LogDebugEntryTable = NULL;
  62
  63 typedef struct LogFunctionHook LogFunctionHook;
  64 struct LogFunctionHook {
  65         LogFunctionHook *next;
  66         int loglevel;
  67         void (*h_function_pointer) (char *);
  68 };
  69 extern LogFunctionHook *LogHookTable;
  70
  71 typedef struct FixedOutputHook FixedOutputHook;
  72 struct FixedOutputHook {
  73         FixedOutputHook *next;
  74         char content_type[64];
  75         void (*h_function_pointer) (char *, int);
  76 };
  77 extern FixedOutputHook *FixedOutputTable;
  78
  79
  80
  81 /*
  82  * SessionFunctionHook extensions are used for any type of hook for which
  83  * the context in which it's being called (which is determined by the event
  84  * type) will make it obvious for the hook function to know where to look for
  85  * pertinent data.
  86  */
  87 typedef struct SessionFunctionHook SessionFunctionHook;
  88 struct SessionFunctionHook {
  89         SessionFunctionHook *next;
  90         void (*h_function_pointer) (void);
  91         int eventtype;
  92 };
  93 extern SessionFunctionHook *SessionHookTable;
  94
  95
  96 /*
  97  * UserFunctionHook extensions are used for any type of hook which implements
  98  * an operation on a user or username (potentially) other than the one
  99  * operating the current session.
 100  */
 101 typedef struct UserFunctionHook UserFunctionHook;
 102 struct UserFunctionHook {
 103         UserFunctionHook *next;
 104         void (*h_function_pointer) (struct ctdluser *usbuf);
 105         int eventtype;
 106 };
 107 extern UserFunctionHook *UserHookTable;
 108
 109 /*
 110  * MessageFunctionHook extensions are used for hooks which implement handlers
 111  * for various types of message operations (save, read, etc.)
 112  */
 113 typedef struct MessageFunctionHook MessageFunctionHook;
 114 struct MessageFunctionHook {
 115         MessageFunctionHook *next;
 116         int (*h_function_pointer) (struct CtdlMessage *msg);
 117         int eventtype;
 118 };
 119 extern MessageFunctionHook *MessageHookTable;
 120
 121
 122 /*
 123  * NetprocFunctionHook extensions are used for hooks which implement handlers
 124  * for incoming network messages.
 125  */
 126 typedef struct NetprocFunctionHook NetprocFunctionHook;
 127 struct NetprocFunctionHook {
 128         NetprocFunctionHook *next;
 129         int (*h_function_pointer) (struct CtdlMessage *msg, char *target_room);
 130 };
 131 extern NetprocFunctionHook *NetprocHookTable;
 132
 133
 134 /*
 135  * DeleteFunctionHook extensions are used for hooks which get called when a
 136  * message is about to be deleted.
 137  */
 138 typedef struct DeleteFunctionHook DeleteFunctionHook;
 139 struct DeleteFunctionHook {
 140         DeleteFunctionHook *next;
 141         void (*h_function_pointer) (char *target_room, long msgnum);
 142 };
 143 extern DeleteFunctionHook *DeleteHookTable;
 144
 145
 146 /*
 147  * ExpressMessageFunctionHook extensions are used for hooks which implement
 148  * the sending of an instant message through various channels.  Any function
 149  * registered should return the number of recipients to whom the message was
 150  * successfully transmitted.
 151  */
 152 typedef struct XmsgFunctionHook XmsgFunctionHook;
 153 struct XmsgFunctionHook {
 154         XmsgFunctionHook *next;
 155         int (*h_function_pointer) (char *, char *, char *, char *);
 156         int order;
 157 };
 158 extern XmsgFunctionHook *XmsgHookTable;
 159
 160
 161
 162
 163 /*
 164  * RoomFunctionHook extensions are used for hooks which impliment room
 165  * processing functions when new messages are added EG. SIEVE.
 166  */
 167 typedef struct RoomFunctionHook RoomFunctionHook;
 168 struct RoomFunctionHook {
 169         RoomFunctionHook *next;
 170         int (*fcn_ptr) (struct ctdlroom *);
 171 };
 172 extern RoomFunctionHook *RoomHookTable;
 173
 174
 175
 176 typedef struct SearchFunctionHook SearchFunctionHook;
 177 struct SearchFunctionHook {
 178         SearchFunctionHook *next;
 179         void (*fcn_ptr) (int *, long **, const char *);
 180         char *name;
 181 };
 182 extern SearchFunctionHook *SearchFunctionHookTable;
 183
 184
 185 CleanupFunctionHook *CleanupHookTable = NULL;
 186 CleanupFunctionHook *EVCleanupHookTable = NULL;
 187 SessionFunctionHook *SessionHookTable = NULL;
 188 UserFunctionHook *UserHookTable = NULL;
 189 XmsgFunctionHook *XmsgHookTable = NULL;
 190 MessageFunctionHook *MessageHookTable = NULL;
 191 NetprocFunctionHook *NetprocHookTable = NULL;
 192 DeleteFunctionHook *DeleteHookTable = NULL;
 193 ServiceFunctionHook *ServiceHookTable = NULL;
 194 FixedOutputHook *FixedOutputTable = NULL;
 195 RoomFunctionHook *RoomHookTable = NULL;
 196 SearchFunctionHook *SearchFunctionHookTable = NULL;
 197
 198 typedef struct ProtoFunctionHook ProtoFunctionHook;
 199 struct ProtoFunctionHook {
 200         void (*handler) (char *cmdbuf);
 201         const char *cmd;
 202         const char *desc;
 203 };
 204
 205 HashList *ProtoHookList = NULL;
 206
 207
 208 #define ERR_PORT (1 << 1)
 209
 210
 211 static StrBuf *portlist = NULL;
 212
 213 static StrBuf *errormessages = NULL;
 214
 215
 216 long   DetailErrorFlags;
 217 ConstStr Empty = {HKEY("")};
 218 char *ErrSubject = "Startup Problems";
 219 ConstStr ErrGeneral[] = {
 220         {HKEY("Citadel had trouble on starting up. ")},
 221         {HKEY(" This means, citadel won't be the service provider for a specific service you configured it to.\n\n"
 222               "If you don't want citadel to provide these services, turn them off in WebCit via: ")},
 223         {HKEY("To make both ways actualy take place restart the citserver with \"sendcommand down\"\n\n"
 224               "The errors returned by the system were:\n")},
 225         {HKEY("You can recheck the above if you follow this faq item:\n"
 226               "http://www.citadel.org/doku.php?id=faq:mastering_your_os:net#netstat")}
 227 };
 228
 229 ConstStr ErrPortShort = { HKEY("We couldn't bind all ports you configured to be provided by citadel server.\n")};
 230 ConstStr ErrPortWhere = { HKEY("\"Admin->System Preferences->Network\".\n\nThe failed ports and sockets are: ")};
 231 ConstStr ErrPortHint  = { HKEY("If you want citadel to provide you with that functionality, "
 232                                "check the output of \"netstat -lnp\" on linux Servers or \"netstat -na\" on *BSD"
 233                                " and stop the program that binds these ports.\n You should eventually remove "
 234                                " their initscripts in /etc/init.d so that you won't get this trouble once more.\n"
 235                                " After that goto \"Administration -> Shutdown Citadel\" to make Citadel restart & retry to bind this port.\n")};
 236
 237
 238 void LogPrintMessages(long err)
 239 {
 240         StrBuf *Message;
 241         StrBuf *List, *DetailList;
 242         ConstStr *Short, *Where, *Hint;
 243
 244
 245         Message = NewStrBufPlain(NULL,
 246                                  StrLength(portlist) + StrLength(errormessages));
 247
 248         DetailErrorFlags = DetailErrorFlags & ~err;
 249
 250         switch (err)
 251         {
 252         case ERR_PORT:
 253                 Short = &ErrPortShort;
 254                 Where = &ErrPortWhere;
 255                 Hint  = &ErrPortHint;
 256                 List  = portlist;
 257                 DetailList = errormessages;
 258                 break;
 259         default:
 260                 Short = &Empty;
 261                 Where = &Empty;
 262                 Hint  = &Empty;
 263                 List  = NULL;
 264                 DetailList = NULL;
 265         }
 266
 267         StrBufAppendBufPlain(Message, CKEY(ErrGeneral[0]), 0);
 268         StrBufAppendBufPlain(Message, CKEY(*Short), 0);
 269         StrBufAppendBufPlain(Message, CKEY(ErrGeneral[1]), 0);
 270         StrBufAppendBufPlain(Message, CKEY(*Where), 0);
 271         StrBufAppendBuf(Message, List, 0);
 272         StrBufAppendBufPlain(Message, HKEY("\n\n"), 0);
 273         StrBufAppendBufPlain(Message, CKEY(*Hint), 0);
 274         StrBufAppendBufPlain(Message, HKEY("\n\n"), 0);
 275         StrBufAppendBufPlain(Message, CKEY(ErrGeneral[2]), 0);
 276         StrBufAppendBuf(Message, DetailList, 0);
 277         StrBufAppendBufPlain(Message, HKEY("\n\n"), 0);
 278         StrBufAppendBufPlain(Message, CKEY(ErrGeneral[3]), 0);
 279
 280         MOD_syslog(LOG_EMERG, "%s", ChrPtr(Message));
 281         MOD_syslog(LOG_EMERG, "%s", ErrSubject);
 282         quickie_message("Citadel", NULL, NULL, AIDEROOM, ChrPtr(Message), FMT_FIXED, ErrSubject);
 283
 284         FreeStrBuf(&Message);
 285         FreeStrBuf(&List);
 286         FreeStrBuf(&DetailList);
 287 }
 288
 289
 290 void AddPortError(char *Port, char *ErrorMessage)
 291 {
 292         long len;
 293
 294         DetailErrorFlags |= ERR_PORT;
 295
 296         len = StrLength(errormessages);
 297         if (len > 0) StrBufAppendBufPlain(errormessages, HKEY("; "), 0);
 298         else errormessages = NewStrBuf();
 299         StrBufAppendBufPlain(errormessages, ErrorMessage, -1, 0);
 300
 301
 302         len = StrLength(portlist);
 303         if (len > 0) StrBufAppendBufPlain(portlist, HKEY(";"), 0);
 304         else portlist = NewStrBuf();
 305         StrBufAppendBufPlain(portlist, Port, -1, 0);
 306 }
 307
 308
 309 int DLoader_Exec_Cmd(char *cmdbuf)
 310 {
 311         void *vP;
 312         ProtoFunctionHook *p;
 313
 314         if (GetHash(ProtoHookList, cmdbuf, 4, &vP) && (vP != NULL)) {
 315                 p = (ProtoFunctionHook*) vP;
 316                 p->handler(&cmdbuf[5]);
 317                 return 1;
 318         }
 319         return 0;
 320 }
 321
 322 long FourHash(const char *key, long length)
 323 {
 324         int i;
 325         int ret = 0;
 326         const unsigned char *ptr = (const unsigned char*)key;
 327
 328         for (i = 0; i < 4; i++, ptr ++)
 329                 ret = (ret << 8) |
 330                         ( ((*ptr >= 'a') &&
 331                            (*ptr <= 'z'))?
 332                           *ptr - 'a' + 'A':
 333                           *ptr);
 334
 335         return ret;
 336 }
 337
 338 void CtdlRegisterDebugFlagHook(const char *Name, long Len, CtdlDbgFunction F, const int *LogP)
 339 {
 340         LogDebugEntry *E;
 341         if (LogDebugEntryTable == NULL)
 342                 LogDebugEntryTable = NewHash(1, NULL);
 343         E = (LogDebugEntry*) malloc(sizeof(LogDebugEntry));
 344         E->F = F;
 345         E->Name = Name;
 346         E->Len = Len;
 347         E->LogP = LogP;
 348         Put(LogDebugEntryTable, Name, Len, E, NULL);
 349
 350 }
 351 void CtdlSetDebugLogFacilities(const char **Str, long n)
 352 {
 353         StrBuf *Token = NULL;
 354         StrBuf *Buf = NULL;
 355         const char *ch;
 356         int i;
 357         int DoAll = 0;
 358         void *vptr;
 359
 360         for (i=0; i < n; i++){
 361                 if ((Str[i] != NULL) && !IsEmptyStr(Str[i])) {
 362                         if (strcmp(Str[i], "all") == 0) {
 363                                 DoAll = 1;
 364                                 continue;
 365                         }
 366                         Buf = NewStrBufPlain(Str[i], -1);
 367                         ch = NULL;
 368                         if (Token == NULL)
 369                                 Token = NewStrBufPlain(NULL, StrLength(Buf));
 370                         while ((ch != StrBufNOTNULL) &&
 371                                StrBufExtract_NextToken(Token, Buf, &ch, ',')) {
 372                                 if (GetHash(LogDebugEntryTable, SKEY(Token), &vptr) &&
 373                                     (vptr != NULL))
 374                                 {
 375                                         LogDebugEntry *E = (LogDebugEntry*)vptr;
 376                                         E->F(1);
 377                                 }
 378                         }
 379                 }
 380                 FreeStrBuf(&Buf);
 381         }
 382         FreeStrBuf(&Token);
 383         if (DoAll) {
 384                 long HKLen;
 385                 const char *ch;
 386                 HashPos *Pos;
 387
 388                 Pos = GetNewHashPos(LogDebugEntryTable, 0);
 389                 while (GetNextHashPos(LogDebugEntryTable, Pos, &HKLen, &ch, &vptr)) {
 390                         LogDebugEntry *E = (LogDebugEntry*)vptr;
 391                         E->F(1);
 392                 }
 393
 394                 DeleteHashPos(&Pos);
 395         }
 396 }
 397 void cmd_log_get(char *argbuf)
 398 {
 399         long HKLen;
 400         const char *ch;
 401         HashPos *Pos;
 402         void *vptr;
 403
 404         if (CtdlAccessCheck(ac_aide)) return;
 405
 406         cprintf("%d Log modules enabled:\n", LISTING_FOLLOWS);
 407
 408         Pos = GetNewHashPos(LogDebugEntryTable, 0);
 409
 410         while (GetNextHashPos(LogDebugEntryTable, Pos, &HKLen, &ch, &vptr)) {
 411                 LogDebugEntry *E = (LogDebugEntry*)vptr;
 412                 cprintf("%s|%d\n", ch, *E->LogP);
 413         }
 414
 415         DeleteHashPos(&Pos);
 416         cprintf("000\n");
 417 }
 418 void cmd_log_set(char *argbuf)
 419 {
 420         void *vptr;
 421         int lset;
 422         int wlen;
 423         char which[SIZ] = "";
 424
 425         if (CtdlAccessCheck(ac_aide)) return;
 426
 427         wlen = extract_token(which, argbuf, 0, '|', sizeof(which));
 428         if (wlen < 0) wlen = 0;
 429         lset = extract_int(argbuf, 1);
 430         if (lset != 0) lset = 1;
 431         if (GetHash(LogDebugEntryTable, which, wlen, &vptr) &&
 432             (vptr != NULL))
 433         {
 434                 LogDebugEntry *E = (LogDebugEntry*)vptr;
 435                 E->F(lset);
 436                 cprintf("%d %s|%d\n", CIT_OK, which, lset);
 437         }
 438         else {
 439                 cprintf("%d Log setting %s not known\n",
 440                         ERROR, which);
 441         }
 442 }
 443 void CtdlDestroyDebugTable(void)
 444 {
 445
 446         DeleteHash(&LogDebugEntryTable);
 447 }
 448
 449 void CtdlRegisterProtoHook(void (*handler) (char *), char *cmd, char *desc)
 450 {
 451         ProtoFunctionHook *p;
 452
 453         if (ProtoHookList == NULL)
 454                 ProtoHookList = NewHash (1, FourHash);
 455
 456
 457         p = (ProtoFunctionHook *)
 458                 malloc(sizeof(ProtoFunctionHook));
 459
 460         if (p == NULL) {
 461                 fprintf(stderr, "can't malloc new ProtoFunctionHook\n");
 462                 exit(EXIT_FAILURE);
 463         }
 464         p->handler = handler;
 465         p->cmd = cmd;
 466         p->desc = desc;
 467
 468         Put(ProtoHookList, cmd, 4, p, NULL);
 469         MOD_syslog(LOG_DEBUG, "Registered server command %s (%s)\n", cmd, desc);
 470 }
 471
 472 void CtdlDestroyProtoHooks(void)
 473 {
 474
 475         DeleteHash(&ProtoHookList);
 476 }
 477
 478
 479 void CtdlRegisterCleanupHook(void (*fcn_ptr) (void))
 480 {
 481
 482         CleanupFunctionHook *newfcn;
 483
 484         newfcn = (CleanupFunctionHook *)
 485             malloc(sizeof(CleanupFunctionHook));
 486         newfcn->next = CleanupHookTable;
 487         newfcn->h_function_pointer = fcn_ptr;
 488         CleanupHookTable = newfcn;
 489
 490         MODM_syslog(LOG_DEBUG, "Registered a new cleanup function\n");
 491 }
 492
 493
 494 void CtdlUnregisterCleanupHook(void (*fcn_ptr) (void))
 495 {
 496         CleanupFunctionHook *cur, *p;
 497
 498         for (cur = CleanupHookTable; cur != NULL; cur = cur->next) {
 499                 /* This will also remove duplicates if any */
 500                 while (cur != NULL &&
 501                                 fcn_ptr == cur->h_function_pointer) {
 502                         MODM_syslog(LOG_DEBUG, "Unregistered cleanup function\n");
 503                         p = cur->next;
 504                         if (cur == CleanupHookTable) {
 505                                 CleanupHookTable = p;
 506                         }
 507                         free(cur);
 508                         cur = p;
 509                 }
 510         }
 511 }
 512
 513
 514 void CtdlDestroyCleanupHooks(void)
 515 {
 516         CleanupFunctionHook *cur, *p;
 517
 518         cur = CleanupHookTable;
 519         while (cur != NULL)
 520         {
 521                 MODM_syslog(LOG_DEBUG, "Destroyed cleanup function\n");
 522                 p = cur->next;
 523                 free(cur);
 524                 cur = p;
 525         }
 526         CleanupHookTable = NULL;
 527 }
 528
 529 void CtdlRegisterEVCleanupHook(void (*fcn_ptr) (void))
 530 {
 531
 532         CleanupFunctionHook *newfcn;
 533
 534         newfcn = (CleanupFunctionHook *)
 535             malloc(sizeof(CleanupFunctionHook));
 536         newfcn->next = EVCleanupHookTable;
 537         newfcn->h_function_pointer = fcn_ptr;
 538         EVCleanupHookTable = newfcn;
 539
 540         MODM_syslog(LOG_DEBUG, "Registered a new cleanup function\n");
 541 }
 542
 543
 544 void CtdlUnregisterEVCleanupHook(void (*fcn_ptr) (void))
 545 {
 546         CleanupFunctionHook *cur, *p;
 547
 548         for (cur = EVCleanupHookTable; cur != NULL; cur = cur->next) {
 549                 /* This will also remove duplicates if any */
 550                 while (cur != NULL &&
 551                                 fcn_ptr == cur->h_function_pointer) {
 552                         MODM_syslog(LOG_DEBUG, "Unregistered cleanup function\n");
 553                         p = cur->next;
 554                         if (cur == EVCleanupHookTable) {
 555                                 EVCleanupHookTable = p;
 556                         }
 557                         free(cur);
 558                         cur = p;
 559                 }
 560         }
 561 }
 562
 563
 564 void CtdlDestroyEVCleanupHooks(void)
 565 {
 566         CleanupFunctionHook *cur, *p;
 567
 568         cur = EVCleanupHookTable;
 569         while (cur != NULL)
 570         {
 571                 MODM_syslog(LOG_DEBUG, "Destroyed cleanup function\n");
 572                 p = cur->next;
 573                 free(cur);
 574                 cur = p;
 575         }
 576         EVCleanupHookTable = NULL;
 577 }
 578
 579
 580 void CtdlRegisterSessionHook(void (*fcn_ptr) (void), int EventType)
 581 {
 582
 583         SessionFunctionHook *newfcn;
 584
 585         newfcn = (SessionFunctionHook *)
 586             malloc(sizeof(SessionFunctionHook));
 587         newfcn->next = SessionHookTable;
 588         newfcn->h_function_pointer = fcn_ptr;
 589         newfcn->eventtype = EventType;
 590         SessionHookTable = newfcn;
 591
 592         MOD_syslog(LOG_DEBUG, "Registered a new session function (type %d)\n",
 593                    EventType);
 594 }
 595
 596
 597 void CtdlUnregisterSessionHook(void (*fcn_ptr) (void), int EventType)
 598 {
 599         SessionFunctionHook *cur, *p;
 600
 601         for (cur = SessionHookTable; cur != NULL; cur = cur->next) {
 602                 /* This will also remove duplicates if any */
 603                 while (cur != NULL &&
 604                                 fcn_ptr == cur->h_function_pointer &&
 605                                 EventType == cur->eventtype) {
 606                         MOD_syslog(LOG_DEBUG, "Unregistered session function (type %d)\n",
 607                                    EventType);
 608                         p = cur->next;
 609                         if (cur == SessionHookTable) {
 610                                 SessionHookTable = p;
 611                         }
 612                         free(cur);
 613                         cur = p;
 614                 }
 615         }
 616 }
 617
 618 void CtdlDestroySessionHooks(void)
 619 {
 620         SessionFunctionHook *cur, *p;
 621
 622         cur = SessionHookTable;
 623         while (cur != NULL)
 624         {
 625                 MODM_syslog(LOG_DEBUG, "Destroyed session function\n");
 626                 p = cur->next;
 627                 free(cur);
 628                 cur = p;
 629         }
 630         SessionHookTable = NULL;
 631 }
 632
 633
 634 void CtdlRegisterUserHook(void (*fcn_ptr) (ctdluser *), int EventType)
 635 {
 636
 637         UserFunctionHook *newfcn;
 638
 639         newfcn = (UserFunctionHook *)
 640             malloc(sizeof(UserFunctionHook));
 641         newfcn->next = UserHookTable;
 642         newfcn->h_function_pointer = fcn_ptr;
 643         newfcn->eventtype = EventType;
 644         UserHookTable = newfcn;
 645
 646         MOD_syslog(LOG_DEBUG, "Registered a new user function (type %d)\n",
 647                    EventType);
 648 }
 649
 650
 651 void CtdlUnregisterUserHook(void (*fcn_ptr) (struct ctdluser *), int EventType)
 652 {
 653         UserFunctionHook *cur, *p;
 654
 655         for (cur = UserHookTable; cur != NULL; cur = cur->next) {
 656                 /* This will also remove duplicates if any */
 657                 while (cur != NULL &&
 658                                 fcn_ptr == cur->h_function_pointer &&
 659                                 EventType == cur->eventtype) {
 660                         MOD_syslog(LOG_DEBUG, "Unregistered user function (type %d)\n",
 661                                    EventType);
 662                         p = cur->next;
 663                         if (cur == UserHookTable) {
 664                                 UserHookTable = p;
 665                         }
 666                         free(cur);
 667                         cur = p;
 668                 }
 669         }
 670 }
 671
 672 void CtdlDestroyUserHooks(void)
 673 {
 674         UserFunctionHook *cur, *p;
 675
 676         cur = UserHookTable;
 677         while (cur != NULL)
 678         {
 679                 MODM_syslog(LOG_DEBUG, "Destroyed user function \n");
 680                 p = cur->next;
 681                 free(cur);
 682                 cur = p;
 683         }
 684         UserHookTable = NULL;
 685 }
 686
 687
 688 void CtdlRegisterMessageHook(int (*handler)(struct CtdlMessage *),
 689                                 int EventType)
 690 {
 691
 692         MessageFunctionHook *newfcn;
 693
 694         newfcn = (MessageFunctionHook *)
 695             malloc(sizeof(MessageFunctionHook));
 696         newfcn->next = MessageHookTable;
 697         newfcn->h_function_pointer = handler;
 698         newfcn->eventtype = EventType;
 699         MessageHookTable = newfcn;
 700
 701         MOD_syslog(LOG_DEBUG, "Registered a new message function (type %d)\n",
 702                    EventType);
 703 }
 704
 705
 706 void CtdlUnregisterMessageHook(int (*handler)(struct CtdlMessage *),
 707                 int EventType)
 708 {
 709         MessageFunctionHook *cur, *p;
 710
 711         for (cur = MessageHookTable; cur != NULL; cur = cur->next) {
 712                 /* This will also remove duplicates if any */
 713                 while (cur != NULL &&
 714                                 handler == cur->h_function_pointer &&
 715                                 EventType == cur->eventtype) {
 716                         MOD_syslog(LOG_DEBUG, "Unregistered message function (type %d)\n",
 717                                    EventType);
 718                         p = cur->next;
 719                         if (cur == MessageHookTable) {
 720                                 MessageHookTable = p;
 721                         }
 722                         free(cur);
 723                         cur = p;
 724                 }
 725         }
 726 }
 727
 728 void CtdlDestroyMessageHook(void)
 729 {
 730         MessageFunctionHook *cur, *p;
 731
 732         cur = MessageHookTable;
 733         while (cur != NULL)
 734         {
 735                 MOD_syslog(LOG_DEBUG, "Destroyed message function (type %d)\n", cur->eventtype);
 736                 p = cur->next;
 737                 free(cur);
 738                 cur = p;
 739         }
 740         MessageHookTable = NULL;
 741 }
 742
 743
 744 void CtdlRegisterRoomHook(int (*fcn_ptr)(struct ctdlroom *))
 745 {
 746         RoomFunctionHook *newfcn;
 747
 748         newfcn = (RoomFunctionHook *)
 749             malloc(sizeof(RoomFunctionHook));
 750         newfcn->next = RoomHookTable;
 751         newfcn->fcn_ptr = fcn_ptr;
 752         RoomHookTable = newfcn;
 753
 754         MODM_syslog(LOG_DEBUG, "Registered a new room function\n");
 755 }
 756
 757
 758 void CtdlUnregisterRoomHook(int (*fcn_ptr)(struct ctdlroom *))
 759 {
 760         RoomFunctionHook *cur, *p, *last;
 761         last = NULL;
 762         cur = RoomHookTable;
 763         while (cur != NULL)
 764         {
 765                 if (fcn_ptr == cur->fcn_ptr) {
 766                         MODM_syslog(LOG_DEBUG, "Unregistered room function\n");
 767                         p = cur->next;
 768
 769                         free(cur);
 770                         cur = NULL;
 771
 772                         if (last != NULL)
 773                                 last->next = p;
 774                         else
 775                                 RoomHookTable = p;
 776                         cur = p;
 777                 }
 778                 last = cur;
 779                 if (cur != NULL)
 780                         cur = cur->next;
 781
 782         }
 783 }
 784
 785
 786 void CtdlDestroyRoomHooks(void)
 787 {
 788         RoomFunctionHook *cur, *p;
 789
 790         cur = RoomHookTable;
 791         while (cur != NULL)
 792         {
 793                 MODM_syslog(LOG_DEBUG, "Destroyed room function\n");
 794                 p = cur->next;
 795                 free(cur);
 796                 cur = p;
 797         }
 798         RoomHookTable = NULL;
 799 }
 800
 801 void CtdlRegisterNetprocHook(int (*handler)(struct CtdlMessage *, char *) )
 802 {
 803         NetprocFunctionHook *newfcn;
 804
 805         newfcn = (NetprocFunctionHook *)
 806             malloc(sizeof(NetprocFunctionHook));
 807         newfcn->next = NetprocHookTable;
 808         newfcn->h_function_pointer = handler;
 809         NetprocHookTable = newfcn;
 810
 811         MODM_syslog(LOG_DEBUG, "Registered a new netproc function\n");
 812 }
 813
 814
 815 void CtdlUnregisterNetprocHook(int (*handler)(struct CtdlMessage *, char *) )
 816 {
 817         NetprocFunctionHook *cur, *p;
 818
 819         for (cur = NetprocHookTable; cur != NULL; cur = cur->next) {
 820                 /* This will also remove duplicates if any */
 821                 while (cur != NULL &&
 822                                 handler == cur->h_function_pointer ) {
 823                         MODM_syslog(LOG_DEBUG, "Unregistered netproc function\n");
 824                         p = cur->next;
 825                         if (cur == NetprocHookTable) {
 826                                 NetprocHookTable = p;
 827                         }
 828                         free(cur);
 829                         cur = p;
 830                 }
 831         }
 832 }
 833
 834 void CtdlDestroyNetprocHooks(void)
 835 {
 836         NetprocFunctionHook *cur, *p;
 837
 838         cur = NetprocHookTable;
 839         while (cur != NULL)
 840         {
 841                 MODM_syslog(LOG_DEBUG, "Destroyed netproc function\n");
 842                 p = cur->next;
 843                 free(cur);
 844                 cur = p;
 845         }
 846         NetprocHookTable = NULL;
 847 }
 848
 849
 850 void CtdlRegisterDeleteHook(void (*handler)(char *, long) )
 851 {
 852         DeleteFunctionHook *newfcn;
 853
 854         newfcn = (DeleteFunctionHook *)
 855             malloc(sizeof(DeleteFunctionHook));
 856         newfcn->next = DeleteHookTable;
 857         newfcn->h_function_pointer = handler;
 858         DeleteHookTable = newfcn;
 859
 860         MODM_syslog(LOG_DEBUG, "Registered a new delete function\n");
 861 }
 862
 863
 864 void CtdlUnregisterDeleteHook(void (*handler)(char *, long) )
 865 {
 866         DeleteFunctionHook *cur, *p;
 867
 868         for (cur = DeleteHookTable; cur != NULL; cur = cur->next) {
 869                 /* This will also remove duplicates if any */
 870                 while (cur != NULL &&
 871                                 handler == cur->h_function_pointer ) {
 872                         MODM_syslog(LOG_DEBUG, "Unregistered delete function\n");
 873                         p = cur->next;
 874                         if (cur == DeleteHookTable) {
 875                                 DeleteHookTable = p;
 876                         }
 877                         free(cur);
 878                         cur = p;
 879                 }
 880         }
 881 }
 882 void CtdlDestroyDeleteHooks(void)
 883 {
 884         DeleteFunctionHook *cur, *p;
 885
 886         cur = DeleteHookTable;
 887         while (cur != NULL)
 888         {
 889                 MODM_syslog(LOG_DEBUG, "Destroyed delete function\n");
 890                 p = cur->next;
 891                 free(cur);
 892                 cur = p;
 893         }
 894         DeleteHookTable = NULL;
 895 }
 896
 897
 898
 899
 900 void CtdlRegisterFixedOutputHook(char *content_type, void (*handler)(char *, int) )
 901 {
 902         FixedOutputHook *newfcn;
 903
 904         newfcn = (FixedOutputHook *)
 905             malloc(sizeof(FixedOutputHook));
 906         newfcn->next = FixedOutputTable;
 907         newfcn->h_function_pointer = handler;
 908         safestrncpy(newfcn->content_type, content_type, sizeof newfcn->content_type);
 909         FixedOutputTable = newfcn;
 910
 911         MOD_syslog(LOG_DEBUG, "Registered a new fixed output function for %s\n", newfcn->content_type);
 912 }
 913
 914
 915 void CtdlUnregisterFixedOutputHook(char *content_type)
 916 {
 917         FixedOutputHook *cur, *p;
 918
 919         for (cur = FixedOutputTable; cur != NULL; cur = cur->next) {
 920                 /* This will also remove duplicates if any */
 921                 while (cur != NULL && (!strcasecmp(content_type, cur->content_type))) {
 922                         MOD_syslog(LOG_DEBUG, "Unregistered fixed output function for %s\n", content_type);
 923                         p = cur->next;
 924                         if (cur == FixedOutputTable) {
 925                                 FixedOutputTable = p;
 926                         }
 927                         free(cur);
 928                         cur = p;
 929                 }
 930         }
 931 }
 932
 933 void CtdlDestroyFixedOutputHooks(void)
 934 {
 935         FixedOutputHook *cur, *p;
 936
 937         cur = FixedOutputTable;
 938         while (cur != NULL)
 939         {
 940                 MOD_syslog(LOG_DEBUG, "Destroyed fixed output function for %s\n", cur->content_type);
 941                 p = cur->next;
 942                 free(cur);
 943                 cur = p;
 944
 945         }
 946         FixedOutputTable = NULL;
 947 }
 948
 949 /* returns nonzero if we found a hook and used it */
 950 int PerformFixedOutputHooks(char *content_type, char *content, int content_length)
 951 {
 952         FixedOutputHook *fcn;
 953
 954         for (fcn = FixedOutputTable; fcn != NULL; fcn = fcn->next) {
 955                 if (!strcasecmp(content_type, fcn->content_type)) {
 956                         (*fcn->h_function_pointer) (content, content_length);
 957                         return(1);
 958                 }
 959         }
 960         return(0);
 961 }
 962
 963
 964
 965
 966
 967 void CtdlRegisterXmsgHook(int (*fcn_ptr) (char *, char *, char *, char *), int order)
 968 {
 969
 970         XmsgFunctionHook *newfcn;
 971
 972         newfcn = (XmsgFunctionHook *) malloc(sizeof(XmsgFunctionHook));
 973         newfcn->next = XmsgHookTable;
 974         newfcn->order = order;
 975         newfcn->h_function_pointer = fcn_ptr;
 976         XmsgHookTable = newfcn;
 977         MOD_syslog(LOG_DEBUG, "Registered a new x-msg function (priority %d)\n", order);
 978 }
 979
 980
 981 void CtdlUnregisterXmsgHook(int (*fcn_ptr) (char *, char *, char *, char *), int order)
 982 {
 983         XmsgFunctionHook *cur, *p;
 984
 985         for (cur = XmsgHookTable; cur != NULL; cur = cur->next) {
 986                 /* This will also remove duplicates if any */
 987                 while (cur != NULL &&
 988                                 fcn_ptr == cur->h_function_pointer &&
 989                                 order == cur->order) {
 990                         MOD_syslog(LOG_DEBUG, "Unregistered x-msg function "
 991                                    "(priority %d)\n", order);
 992                         p = cur->next;
 993                         if (cur == XmsgHookTable) {
 994                                 XmsgHookTable = p;
 995                         }
 996                         free(cur);
 997                         cur = p;
 998                 }
 999         }
1000 }
1001
1002 void CtdlDestroyXmsgHooks(void)
1003 {
1004         XmsgFunctionHook *cur, *p;
1005
1006         cur = XmsgHookTable;
1007         while (cur != NULL)
1008         {
1009                 MOD_syslog(LOG_DEBUG, "Destroyed x-msg function "
1010                         "(priority %d)\n", cur->order);
1011                 p = cur->next;
1012
1013                 free(cur);
1014                 cur = p;
1015         }
1016         XmsgHookTable = NULL;
1017 }
1018
1019
1020 void CtdlRegisterServiceHook(int tcp_port,
1021                              char *sockpath,
1022                              void (*h_greeting_function) (void),
1023                              void (*h_command_function) (void),
1024                              void (*h_async_function) (void),
1025                              const char *ServiceName)
1026 {
1027         ServiceFunctionHook *newfcn;
1028         char *message;
1029         char error[SIZ];
1030
1031         strcpy(error, "");
1032         newfcn = (ServiceFunctionHook *) malloc(sizeof(ServiceFunctionHook));
1033         message = (char*) malloc (SIZ + SIZ);
1034
1035         newfcn->next = ServiceHookTable;
1036         newfcn->tcp_port = tcp_port;
1037         newfcn->sockpath = sockpath;
1038         newfcn->h_greeting_function = h_greeting_function;
1039         newfcn->h_command_function = h_command_function;
1040         newfcn->h_async_function = h_async_function;
1041         newfcn->ServiceName = ServiceName;
1042
1043         if (sockpath != NULL) {
1044                 newfcn->msock = ctdl_uds_server(sockpath, config.c_maxsessions, error);
1045                 snprintf(message, SIZ, "Unix domain socket '%s': ", sockpath);
1046         }
1047         else if (tcp_port <= 0) {       /* port -1 to disable */
1048                 MOD_syslog(LOG_INFO, "Service %s has been manually disabled, skipping\n", ServiceName);
1049                 free (message);
1050                 free(newfcn);
1051                 return;
1052         }
1053         else {
1054                 newfcn->msock = ctdl_tcp_server(config.c_ip_addr,
1055                                               tcp_port,
1056                                               config.c_maxsessions,
1057                                               error);
1058                 snprintf(message, SIZ, "TCP port %s:%d: (%s) ",
1059                          config.c_ip_addr, tcp_port, ServiceName);
1060         }
1061
1062         if (newfcn->msock > 0) {
1063                 ServiceHookTable = newfcn;
1064                 strcat(message, "registered.");
1065                 MOD_syslog(LOG_INFO, "%s\n", message);
1066         }
1067         else {
1068                 AddPortError(message, error);
1069                 strcat(message, "FAILED.");
1070                 MOD_syslog(LOG_CRIT, "%s\n", message);
1071                 free(newfcn);
1072         }
1073         free(message);
1074 }
1075
1076
1077 void CtdlUnregisterServiceHook(int tcp_port, char *sockpath,
1078                         void (*h_greeting_function) (void),
1079                         void (*h_command_function) (void),
1080                         void (*h_async_function) (void)
1081                         )
1082 {
1083         ServiceFunctionHook *cur, *p;
1084
1085         cur = ServiceHookTable;
1086         while (cur != NULL) {
1087                 /* This will also remove duplicates if any */
1088                 while (cur != NULL &&
1089                                 !(sockpath && cur->sockpath &&
1090                                         strcmp(sockpath, cur->sockpath)) &&
1091                                 h_greeting_function == cur->h_greeting_function &&
1092                                 h_command_function == cur->h_command_function &&
1093                                 h_async_function == cur->h_async_function &&
1094                                 tcp_port == cur->tcp_port) {
1095                         close(cur->msock);
1096                         if (sockpath) {
1097                                 MOD_syslog(LOG_INFO, "Closed UNIX domain socket %s\n",
1098                                            sockpath);
1099                                 unlink(sockpath);
1100                         } else if (tcp_port) {
1101                                 MOD_syslog(LOG_INFO, "Closed TCP port %d\n", tcp_port);
1102                         } else {
1103                                 MOD_syslog(LOG_INFO, "Unregistered service \"%s\"\n", cur->ServiceName);
1104                         }
1105                         p = cur->next;
1106                         if (cur == ServiceHookTable) {
1107                                 ServiceHookTable = p;
1108                         }
1109                         free(cur);
1110                         cur = p;
1111                 }
1112         }
1113 }
1114
1115
1116 void CtdlShutdownServiceHooks(void)
1117 {
1118         /* sort of a duplicate of close_masters() but called earlier */
1119         ServiceFunctionHook *cur;
1120
1121         cur = ServiceHookTable;
1122         while (cur != NULL)
1123         {
1124                 if (cur->msock != -1)
1125                 {
1126                         close(cur->msock);
1127                         cur->msock = -1;
1128                         if (cur->sockpath != NULL){
1129                                 MOD_syslog(LOG_INFO, "[%s] Closed UNIX domain socket %s\n",
1130                                            cur->ServiceName,
1131                                            cur->sockpath);
1132                                 unlink(cur->sockpath);
1133                         } else {
1134                                 MOD_syslog(LOG_INFO, "[%s] closing service\n",
1135                                            cur->ServiceName);
1136                         }
1137                 }
1138                 cur = cur->next;
1139         }
1140 }
1141
1142 void CtdlDestroyServiceHook(void)
1143 {
1144         ServiceFunctionHook *cur, *p;
1145
1146         cur = ServiceHookTable;
1147         while (cur != NULL)
1148         {
1149                 close(cur->msock);
1150                 if (cur->sockpath) {
1151                         MOD_syslog(LOG_INFO, "Closed UNIX domain socket %s\n",
1152                                    cur->sockpath);
1153                         unlink(cur->sockpath);
1154                 } else if (cur->tcp_port) {
1155                         MOD_syslog(LOG_INFO, "Closed TCP port %d\n", cur->tcp_port);
1156                 } else {
1157                         MOD_syslog(LOG_INFO, "Destroyed service \"%s\"\n", cur->ServiceName);
1158                 }
1159                 p = cur->next;
1160                 free(cur);
1161                 cur = p;
1162         }
1163         ServiceHookTable = NULL;
1164 }
1165
1166 void CtdlRegisterSearchFuncHook(void (*fcn_ptr)(int *, long **, const char *), char *name)
1167 {
1168         SearchFunctionHook *newfcn;
1169
1170         if (!name || !fcn_ptr) {
1171                 return;
1172         }
1173
1174         newfcn = (SearchFunctionHook *)
1175             malloc(sizeof(SearchFunctionHook));
1176         newfcn->next = SearchFunctionHookTable;
1177         newfcn->name = name;
1178         newfcn->fcn_ptr = fcn_ptr;
1179         SearchFunctionHookTable = newfcn;
1180
1181         MOD_syslog(LOG_DEBUG, "Registered a new search function (%s)\n", name);
1182 }
1183
1184 void CtdlUnregisterSearchFuncHook(void (*fcn_ptr)(int *, long **, const char *), char *name)
1185 {
1186         SearchFunctionHook *cur, *p;
1187
1188         for (cur = SearchFunctionHookTable; cur != NULL; cur = cur->next) {
1189                 while (fcn_ptr && (cur->fcn_ptr == fcn_ptr) && name && !strcmp(name, cur->name)) {
1190                         MOD_syslog(LOG_DEBUG, "Unregistered search function(%s)\n", name);
1191                         p = cur->next;
1192                         if (cur == SearchFunctionHookTable) {
1193                                 SearchFunctionHookTable = p;
1194                         }
1195                         free (cur);
1196                         cur = p;
1197                 }
1198         }
1199 }
1200
1201 void CtdlDestroySearchHooks(void)
1202 {
1203         SearchFunctionHook *cur, *p;
1204
1205         cur = SearchFunctionHookTable;
1206         SearchFunctionHookTable = NULL;
1207         while (cur != NULL) {
1208                 p = cur->next;
1209                 free(cur);
1210                 cur = p;
1211         }
1212 }
1213
1214 void CtdlModuleDoSearch(int *num_msgs, long **search_msgs, const char *search_string, const char *func_name)
1215 {
1216         SearchFunctionHook *fcn = NULL;
1217
1218         for (fcn = SearchFunctionHookTable; fcn != NULL; fcn = fcn->next) {
1219                 if (!func_name || !strcmp(func_name, fcn->name)) {
1220                         (*fcn->fcn_ptr) (num_msgs, search_msgs, search_string);
1221                         return;
1222                 }
1223         }
1224         *num_msgs = 0;
1225 }
1226
1227
1228 void PerformSessionHooks(int EventType)
1229 {
1230         SessionFunctionHook *fcn = NULL;
1231
1232         for (fcn = SessionHookTable; fcn != NULL; fcn = fcn->next) {
1233                 if (fcn->eventtype == EventType) {
1234                         if (EventType == EVT_TIMER) {
1235                                 pthread_setspecific(MyConKey, NULL);    /* for every hook */
1236                         }
1237                         (*fcn->h_function_pointer) ();
1238                 }
1239         }
1240 }
1241
1242 void PerformUserHooks(ctdluser *usbuf, int EventType)
1243 {
1244         UserFunctionHook *fcn = NULL;
1245
1246         for (fcn = UserHookTable; fcn != NULL; fcn = fcn->next) {
1247                 if (fcn->eventtype == EventType) {
1248                         (*fcn->h_function_pointer) (usbuf);
1249                 }
1250         }
1251 }
1252
1253 int PerformMessageHooks(struct CtdlMessage *msg, int EventType)
1254 {
1255         MessageFunctionHook *fcn = NULL;
1256         int total_retval = 0;
1257
1258         /* Other code may elect to protect this message from server-side
1259          * handlers; if this is the case, don't do anything.
1260         MOD_syslog(LOG_DEBUG, "** Event type is %d, flags are %d\n", EventType, msg->cm_flags);
1261          */
1262         if (msg->cm_flags & CM_SKIP_HOOKS) {
1263                 MODM_syslog(LOG_DEBUG, "Skipping hooks\n");
1264                 return(0);
1265         }
1266
1267         /* Otherwise, run all the hooks appropriate to this event type.
1268          */
1269         for (fcn = MessageHookTable; fcn != NULL; fcn = fcn->next) {
1270                 if (fcn->eventtype == EventType) {
1271                         total_retval = total_retval + (*fcn->h_function_pointer) (msg);
1272                 }
1273         }
1274
1275         /* Return the sum of the return codes from the hook functions.  If
1276          * this is an EVT_BEFORESAVE event, a nonzero return code will cause
1277          * the save operation to abort.
1278          */
1279         return total_retval;
1280 }
1281
1282
1283 int PerformRoomHooks(struct ctdlroom *target_room)
1284 {
1285         RoomFunctionHook *fcn;
1286         int total_retval = 0;
1287
1288         MOD_syslog(LOG_DEBUG, "Performing room hooks for <%s>\n", target_room->QRname);
1289
1290         for (fcn = RoomHookTable; fcn != NULL; fcn = fcn->next) {
1291                 total_retval = total_retval + (*fcn->fcn_ptr) (target_room);
1292         }
1293
1294         /* Return the sum of the return codes from the hook functions.
1295          */
1296         return total_retval;
1297 }
1298
1299
1300 int PerformNetprocHooks(struct CtdlMessage *msg, char *target_room)
1301 {
1302         NetprocFunctionHook *fcn;
1303         int total_retval = 0;
1304
1305         for (fcn = NetprocHookTable; fcn != NULL; fcn = fcn->next) {
1306                 total_retval = total_retval +
1307                         (*fcn->h_function_pointer) (msg, target_room);
1308         }
1309
1310         /* Return the sum of the return codes from the hook functions.
1311          * A nonzero return code will cause the message to *not* be imported.
1312          */
1313         return total_retval;
1314 }
1315
1316
1317 void PerformDeleteHooks(char *room, long msgnum)
1318 {
1319         DeleteFunctionHook *fcn;
1320
1321         for (fcn = DeleteHookTable; fcn != NULL; fcn = fcn->next) {
1322                 (*fcn->h_function_pointer) (room, msgnum);
1323         }
1324 }
1325
1326
1327
1328
1329
1330 int PerformXmsgHooks(char *sender, char *sender_email, char *recp, char *msg)
1331 {
1332         XmsgFunctionHook *fcn;
1333         int total_sent = 0;
1334         int p;
1335
1336         for (p=0; p<MAX_XMSG_PRI; ++p) {
1337                 for (fcn = XmsgHookTable; fcn != NULL; fcn = fcn->next) {
1338                         if (fcn->order == p) {
1339                                 total_sent +=
1340                                         (*fcn->h_function_pointer)
1341                                                 (sender, sender_email, recp, msg);
1342                         }
1343                 }
1344                 /* Break out of the loop if a higher-priority function
1345                  * successfully delivered the message.  This prevents duplicate
1346                  * deliveries to local users simultaneously signed onto
1347                  * remote services.
1348                  */
1349                 if (total_sent) break;
1350         }
1351         return total_sent;
1352 }
1353
1354
1355 /*
1356  * Dirty hack until we impliment a hook mechanism for this
1357  */
1358 void CtdlModuleStartCryptoMsgs(char *ok_response, char *nosup_response, char *error_response)
1359 {
1360 #ifdef HAVE_OPENSSL
1361         CtdlStartTLS (ok_response, nosup_response, error_response);
1362 #endif
1363 }
1364
1365 void DebugModulesEnable(const int n)
1366 {
1367         DebugModules = n;
1368 }
1369 CTDL_MODULE_INIT(modules)
1370 {
1371         if (!threading) {
1372                 CtdlRegisterDebugFlagHook(HKEY("modules"), DebugModulesEnable, &DebugModules);
1373
1374                 CtdlRegisterProtoHook(cmd_log_get, "LOGP", "Print Log-parameters");
1375                 CtdlRegisterProtoHook(cmd_log_set, "LOGS", "Set Log-parameters");
1376         }
1377         return "modules";
1378 }