citadel/modules/wiki/serv_wiki.c

   1 /*
   2  * $Id$
   3  *
   4  * Server-side module for Wiki rooms.  This handles things like version control.
   5  *
   6  * Copyright (c) 2009 by the citadel.org team
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 3 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22
  23 #include "sysdep.h"
  24 #include <stdlib.h>
  25 #include <unistd.h>
  26 #include <stdio.h>
  27 #include <fcntl.h>
  28 #include <signal.h>
  29 #include <pwd.h>
  30 #include <errno.h>
  31 #include <ctype.h>
  32 #include <sys/types.h>
  33
  34 #if TIME_WITH_SYS_TIME
  35 # include <sys/time.h>
  36 # include <time.h>
  37 #else
  38 # if HAVE_SYS_TIME_H
  39 #  include <sys/time.h>
  40 # else
  41 #  include <time.h>
  42 # endif
  43 #endif
  44
  45 #include <sys/wait.h>
  46 #include <string.h>
  47 #include <limits.h>
  48 #include <libcitadel.h>
  49 #include "citadel.h"
  50 #include "server.h"
  51 #include "citserver.h"
  52 #include "support.h"
  53 #include "config.h"
  54 #include "control.h"
  55 #include "user_ops.h"
  56 #include "policy.h"
  57 #include "database.h"
  58 #include "msgbase.h"
  59 #include "euidindex.h"
  60 #include "ctdl_module.h"
  61
  62 /*
  63  * Data passed back and forth between wiki_rev() and its MIME parser callback
  64  */
  65 struct HistoryEraserCallBackData {
  66         char *tempfilename;             /* name of temp file being patched */
  67         char *stop_when;                /* stop when we hit this uuid */
  68         int done;                       /* set to nonzero when we're done patching */
  69 };
  70
  71 /*
  72  * Name of the temporary room we create to store old revisions when someone requests them.
  73  * We put it in an invalid namespace so the DAP cleans up after us later.
  74  */
  75 char *wwm = "9999999999.WikiWaybackMachine";
  76
  77 /*
  78  * Before allowing a wiki page save to execute, we have to perform version control.
  79  * This involves fetching the old version of the page if it exists.
  80  */
  81 int wiki_upload_beforesave(struct CtdlMessage *msg) {
  82         struct CitContext *CCC = CC;
  83         long old_msgnum = (-1L);
  84         struct CtdlMessage *old_msg = NULL;
  85         long history_msgnum = (-1L);
  86         struct CtdlMessage *history_msg = NULL;
  87         char diff_old_filename[PATH_MAX];
  88         char diff_new_filename[PATH_MAX];
  89         char diff_cmd[PATH_MAX];
  90         FILE *fp;
  91         int rv;
  92         char history_page[1024];
  93         char boundary[256];
  94         char prefixed_boundary[258];
  95         char buf[1024];
  96         int nbytes = 0;
  97         char *diffbuf = NULL;
  98         size_t diffbuf_len = 0;
  99         char *ptr = NULL;
 100
 101         if (!CCC->logged_in) return(0); /* Only do this if logged in. */
 102
 103         /* Is this a room with a Wiki in it, don't run this hook. */
 104         if (CCC->room.QRdefaultview != VIEW_WIKI) {
 105                 return(0);
 106         }
 107
 108         /* If this isn't a MIME message, don't bother. */
 109         if (msg->cm_format_type != 4) return(0);
 110
 111         /* If there's no EUID we can't do this. */
 112         if (msg->cm_fields['E'] == NULL) return(0);
 113         snprintf(history_page, sizeof history_page, "%s_HISTORY_", msg->cm_fields['E']);
 114
 115         /* Make sure we're saving a real wiki page rather than a wiki history page.
 116          * This is important in order to avoid recursing infinitely into this hook.
 117          */
 118         if (    (strlen(msg->cm_fields['E']) >= 9)
 119                 && (!strcasecmp(&msg->cm_fields['E'][strlen(msg->cm_fields['E'])-9], "_HISTORY_"))
 120         ) {
 121                 CtdlLogPrintf(CTDL_DEBUG, "History page not being historied\n");
 122                 return(0);
 123         }
 124
 125         /* If there's no message text, obviously this is all b0rken and shouldn't happen at all */
 126         if (msg->cm_fields['M'] == NULL) return(0);
 127
 128         /* See if we can retrieve the previous version. */
 129         old_msgnum = locate_message_by_euid(msg->cm_fields['E'], &CCC->room);
 130         if (old_msgnum > 0L) {
 131                 old_msg = CtdlFetchMessage(old_msgnum, 1);
 132         }
 133         else {
 134                 old_msg = NULL;
 135         }
 136
 137         if ((old_msg != NULL) && (old_msg->cm_fields['M'] == NULL)) {   /* old version is corrupt? */
 138                 CtdlFreeMessage(old_msg);
 139                 old_msg = NULL;
 140         }
 141
 142         /* If no changes were made, don't bother saving it again */
 143         if ((old_msg != NULL) && (!strcmp(msg->cm_fields['M'], old_msg->cm_fields['M']))) {
 144                 CtdlFreeMessage(old_msg);
 145                 return(1);
 146         }
 147
 148         /*
 149          * Generate diffs
 150          */
 151         CtdlMakeTempFileName(diff_old_filename, sizeof diff_old_filename);
 152         CtdlMakeTempFileName(diff_new_filename, sizeof diff_new_filename);
 153
 154         if (old_msg != NULL) {
 155                 fp = fopen(diff_old_filename, "w");
 156                 rv = fwrite(old_msg->cm_fields['M'], strlen(old_msg->cm_fields['M']), 1, fp);
 157                 fclose(fp);
 158                 CtdlFreeMessage(old_msg);
 159         }
 160
 161         fp = fopen(diff_new_filename, "w");
 162         rv = fwrite(msg->cm_fields['M'], strlen(msg->cm_fields['M']), 1, fp);
 163         fclose(fp);
 164
 165         diffbuf_len = 0;
 166         diffbuf = NULL;
 167         snprintf(diff_cmd, sizeof diff_cmd,
 168                 "diff -u %s %s",
 169                 diff_new_filename,
 170                 ((old_msg != NULL) ? diff_old_filename : "/dev/null")
 171         );
 172         fp = popen(diff_cmd, "r");
 173         if (fp != NULL) {
 174                 do {
 175                         diffbuf = realloc(diffbuf, diffbuf_len + 1025);
 176                         nbytes = fread(&diffbuf[diffbuf_len], 1, 1024, fp);
 177                         diffbuf_len += nbytes;
 178                 } while (nbytes == 1024);
 179                 diffbuf[diffbuf_len] = 0;
 180                 pclose(fp);
 181         }
 182         CtdlLogPrintf(CTDL_DEBUG, "diff length is %d bytes\n", diffbuf_len);
 183
 184         unlink(diff_old_filename);
 185         unlink(diff_new_filename);
 186
 187         /* Determine whether this was a bogus (empty) edit */
 188         if ((diffbuf_len = 0) && (diffbuf != NULL)) {
 189                 free(diffbuf);
 190                 diffbuf = NULL;
 191         }
 192         if (diffbuf == NULL) {
 193                 return(1);              /* No changes at all?  Abandon the post entirely! */
 194         }
 195
 196         /* Now look for the existing edit history */
 197
 198         history_msgnum = locate_message_by_euid(history_page, &CCC->room);
 199         history_msg = NULL;
 200         if (history_msgnum > 0L) {
 201                 history_msg = CtdlFetchMessage(history_msgnum, 1);
 202         }
 203
 204         /* Create a new history message if necessary */
 205         if (history_msg == NULL) {
 206                 history_msg = malloc(sizeof(struct CtdlMessage));
 207                 memset(history_msg, 0, sizeof(struct CtdlMessage));
 208                 history_msg->cm_magic = CTDLMESSAGE_MAGIC;
 209                 history_msg->cm_anon_type = MES_NORMAL;
 210                 history_msg->cm_format_type = FMT_RFC822;
 211                 history_msg->cm_fields['A'] = strdup("Citadel");
 212                 history_msg->cm_fields['R'] = strdup(CCC->room.QRname);
 213                 history_msg->cm_fields['E'] = strdup(history_page);
 214                 history_msg->cm_fields['U'] = strdup(history_page);
 215                 snprintf(boundary, sizeof boundary, "Citadel--Multipart--%04x--%08lx", getpid(), time(NULL));
 216                 history_msg->cm_fields['M'] = malloc(1024);
 217                 snprintf(history_msg->cm_fields['M'], 1024,
 218                         "Content-type: multipart/mixed; boundary=\"%s\"\n\n"
 219                         "This is a Citadel wiki history encoded as multipart MIME.\n"
 220                         "Each part is comprised of a diff script representing one change set.\n"
 221                         "\n"
 222                         "--%s--\n"
 223                         ,
 224                         boundary, boundary
 225                 );
 226         }
 227
 228         /* Update the history message (regardless of whether it's new or existing) */
 229
 230         /* First, figure out the boundary string.  We do this even when we generated the
 231          * boundary string in the above code, just to be safe and consistent.
 232          */
 233         strcpy(boundary, "");
 234
 235         ptr = history_msg->cm_fields['M'];
 236         do {
 237                 ptr = memreadline(ptr, buf, sizeof buf);
 238                 if (*ptr != 0) {
 239                         striplt(buf);
 240                         if (!IsEmptyStr(buf) && (!strncasecmp(buf, "Content-type:", 13))) {
 241                                 if (
 242                                         (bmstrcasestr(buf, "multipart") != NULL)
 243                                         && (bmstrcasestr(buf, "boundary=") != NULL)
 244                                 ) {
 245                                         safestrncpy(boundary, bmstrcasestr(buf, "\""), sizeof boundary);
 246                                         char *qu;
 247                                         qu = strchr(boundary, '\"');
 248                                         if (qu) {
 249                                                 strcpy(boundary, ++qu);
 250                                         }
 251                                         qu = strchr(boundary, '\"');
 252                                         if (qu) {
 253                                                 *qu = 0;
 254                                         }
 255                                 }
 256                         }
 257                 }
 258         } while ( (IsEmptyStr(boundary)) && (*ptr != 0) );
 259
 260         /* Now look for the first boundary.  That is where we need to insert our fun.
 261          */
 262         if (!IsEmptyStr(boundary)) {
 263                 snprintf(prefixed_boundary, sizeof prefixed_boundary, "--%s", boundary);
 264                 history_msg->cm_fields['M'] = realloc(history_msg->cm_fields['M'],
 265                         strlen(history_msg->cm_fields['M']) + strlen(diffbuf) + 1024
 266                 );
 267                 ptr = bmstrcasestr(history_msg->cm_fields['M'], prefixed_boundary);
 268                 if (ptr != NULL) {
 269                         char *the_rest_of_it = strdup(ptr);
 270                         char uuid[32];
 271                         char memo[512];
 272                         char encoded_memo[768];
 273                         generate_uuid(uuid);
 274                         snprintf(memo, sizeof memo, "%s|%ld|%s|%s",
 275                                 uuid,
 276                                 time(NULL),
 277                                 CCC->user.fullname,
 278                                 config.c_nodename
 279                                 /* no longer logging CCC->cs_inet_email */
 280                         );
 281                         CtdlEncodeBase64(encoded_memo, memo, strlen(memo), 0);
 282                         sprintf(ptr, "--%s\n"
 283                                         "Content-type: text/plain\n"
 284                                         "Content-Disposition: inline; filename=\"%s\"\n"
 285                                         "Content-Transfer-Encoding: 8bit\n"
 286                                         "\n"
 287                                         "%s\n"
 288                                         "%s"
 289                                         ,
 290                                 boundary,
 291                                 encoded_memo,
 292                                 diffbuf,
 293                                 the_rest_of_it
 294                         );
 295                         free(the_rest_of_it);
 296                 }
 297
 298                 history_msg->cm_fields['T'] = realloc(history_msg->cm_fields['T'], 32);
 299                 snprintf(history_msg->cm_fields['T'], 32, "%ld", time(NULL));
 300
 301                 CtdlSubmitMsg(history_msg, NULL, "", 0);
 302         }
 303         else {
 304                 CtdlLogPrintf(CTDL_ALERT, "Empty boundary string in history message.  No history!\n");
 305         }
 306
 307         free(diffbuf);
 308         free(history_msg);
 309         return(0);
 310 }
 311
 312
 313 /*
 314  * MIME Parser callback for wiki_history()
 315  *
 316  * The "filename" field will contain a memo field.  All we have to do is decode
 317  * the base64 and output it.  The data is already in a delimited format suitable
 318  * for our client protocol.
 319  */
 320 void wiki_history_callback(char *name, char *filename, char *partnum, char *disp,
 321                    void *content, char *cbtype, char *cbcharset, size_t length,
 322                    char *encoding, char *cbid, void *cbuserdata)
 323 {
 324         char memo[1024];
 325
 326         CtdlDecodeBase64(memo, filename, strlen(filename));
 327         cprintf("%s\n", memo);
 328 }
 329
 330
 331 /*
 332  * Fetch a list of revisions for a particular wiki page
 333  */
 334 void wiki_history(char *pagename) {
 335         int r;
 336         char history_page_name[270];
 337         long msgnum;
 338         struct CtdlMessage *msg;
 339
 340         r = CtdlDoIHavePermissionToReadMessagesInThisRoom();
 341         if (r != om_ok) {
 342                 if (r == om_not_logged_in) {
 343                         cprintf("%d Not logged in.\n", ERROR + NOT_LOGGED_IN);
 344                 }
 345                 else {
 346                         cprintf("%d An unknown error has occurred.\n", ERROR);
 347                 }
 348                 return;
 349         }
 350
 351         snprintf(history_page_name, sizeof history_page_name, "%s_HISTORY_", pagename);
 352         msgnum = locate_message_by_euid(history_page_name, &CC->room);
 353         if (msgnum > 0L) {
 354                 msg = CtdlFetchMessage(msgnum, 1);
 355         }
 356         else {
 357                 msg = NULL;
 358         }
 359
 360         if ((msg != NULL) && (msg->cm_fields['M'] == NULL)) {
 361                 CtdlFreeMessage(msg);
 362                 msg = NULL;
 363         }
 364
 365         if (msg == NULL) {
 366                 cprintf("%d Revision history for '%s' was not found.\n", ERROR+MESSAGE_NOT_FOUND, pagename);
 367                 return;
 368         }
 369
 370
 371         cprintf("%d Revision history for '%s'\n", LISTING_FOLLOWS, pagename);
 372         mime_parser(msg->cm_fields['M'], NULL, *wiki_history_callback, NULL, NULL, NULL, 0);
 373         cprintf("000\n");
 374
 375         CtdlFreeMessage(msg);
 376         return;
 377 }
 378
 379 /*
 380  * MIME Parser callback for wiki_rev()
 381  *
 382  * The "filename" field will contain a memo field, which includes (among other things)
 383  * the uuid of this revision.  After we hit the desired revision, we stop processing.
 384  *
 385  * The "content" filed will contain "diff" output suitable for applying via "patch"
 386  * to our temporary file.
 387  */
 388 void wiki_rev_callback(char *name, char *filename, char *partnum, char *disp,
 389                    void *content, char *cbtype, char *cbcharset, size_t length,
 390                    char *encoding, char *cbid, void *cbuserdata)
 391 {
 392         struct HistoryEraserCallBackData *hecbd = (struct HistoryEraserCallBackData *)cbuserdata;
 393         char memo[1024];
 394         char this_rev[256];
 395         FILE *fp;
 396         char *ptr = NULL;
 397         char buf[1024];
 398
 399         /* Did a previous callback already indicate that we've reached our target uuid?
 400          * If so, don't process anything else.
 401          */
 402         if (hecbd->done) {
 403                 return;
 404         }
 405
 406         CtdlDecodeBase64(memo, filename, strlen(filename));
 407         extract_token(this_rev, memo, 0, '|', sizeof this_rev);
 408         CtdlLogPrintf(CTDL_DEBUG, "callback found rev: %s\n", this_rev);
 409
 410         /* Perform the patch */
 411         fp = popen("patch -f -s -p0 >/dev/null 2>/dev/null", "w");
 412         if (fp) {
 413                 /* Replace the filenames in the patch with the tempfilename we're actually tweaking */
 414                 fprintf(fp, "--- %s\n", hecbd->tempfilename);
 415                 fprintf(fp, "+++ %s\n", hecbd->tempfilename);
 416
 417                 ptr = (char *)content;
 418                 int linenum = 0;
 419                 do {
 420                         ++linenum;
 421                         ptr = memreadline(ptr, buf, sizeof buf);
 422                         if (*ptr != 0) {
 423                                 if (linenum <= 2) {
 424                                         /* skip the first two lines; they contain bogus filenames */
 425                                 }
 426                                 else {
 427                                         fprintf(fp, "%s\n", buf);
 428                                 }
 429                         }
 430                 } while ((*ptr != 0) && ((int)ptr < ((int)content + length)));
 431                 pclose(fp);
 432         }
 433
 434         if (!strcasecmp(this_rev, hecbd->stop_when)) {
 435                 /* Found our target rev.  Tell any subsequent callbacks to suppress processing. */
 436                 CtdlLogPrintf(CTDL_DEBUG, "Target revision has been reached -- stop patching.\n");
 437                 hecbd->done = 1;
 438         }
 439 }
 440
 441
 442 /*
 443  * Fetch a specific revision of a wiki page.  The "operation" string may be set to "fetch" in order
 444  * to simply fetch the desired revision and store it in a temporary location for viewing, or "revert"
 445  * to revert the currently active page to that revision.
 446  */
 447 void wiki_rev(char *pagename, char *rev, char *operation)
 448 {
 449         int r;
 450         char history_page_name[270];
 451         long msgnum;
 452         char temp[PATH_MAX];
 453         char timestamp[64];
 454         struct CtdlMessage *msg;
 455         FILE *fp;
 456         struct HistoryEraserCallBackData hecbd;
 457         long len = 0L;
 458         int rv;
 459
 460         r = CtdlDoIHavePermissionToReadMessagesInThisRoom();
 461         if (r != om_ok) {
 462                 if (r == om_not_logged_in) {
 463                         cprintf("%d Not logged in.\n", ERROR + NOT_LOGGED_IN);
 464                 }
 465                 else {
 466                         cprintf("%d An unknown error has occurred.\n", ERROR);
 467                 }
 468                 return;
 469         }
 470
 471         /* Begin by fetching the current version of the page.  We're going to patch
 472          * backwards through the diffs until we get the one we want.
 473          */
 474         msgnum = locate_message_by_euid(pagename, &CC->room);
 475         if (msgnum > 0L) {
 476                 msg = CtdlFetchMessage(msgnum, 1);
 477         }
 478         else {
 479                 msg = NULL;
 480         }
 481
 482         if ((msg != NULL) && (msg->cm_fields['M'] == NULL)) {
 483                 CtdlFreeMessage(msg);
 484                 msg = NULL;
 485         }
 486
 487         if (msg == NULL) {
 488                 cprintf("%d Page '%s' was not found.\n", ERROR+MESSAGE_NOT_FOUND, pagename);
 489                 return;
 490         }
 491
 492         /* Output it to a temporary file */
 493
 494         CtdlMakeTempFileName(temp, sizeof temp);
 495         fp = fopen(temp, "w");
 496         if (fp != NULL) {
 497                 r = fwrite(msg->cm_fields['M'], strlen(msg->cm_fields['M']), 1, fp);
 498                 fclose(fp);
 499         }
 500         else {
 501                 CtdlLogPrintf(CTDL_ALERT, "Cannot open %s: %s\n", temp, strerror(errno));
 502         }
 503         CtdlFreeMessage(msg);
 504
 505         /* Get the revision history */
 506
 507         snprintf(history_page_name, sizeof history_page_name, "%s_HISTORY_", pagename);
 508         msgnum = locate_message_by_euid(history_page_name, &CC->room);
 509         if (msgnum > 0L) {
 510                 msg = CtdlFetchMessage(msgnum, 1);
 511         }
 512         else {
 513                 msg = NULL;
 514         }
 515
 516         if ((msg != NULL) && (msg->cm_fields['M'] == NULL)) {
 517                 CtdlFreeMessage(msg);
 518                 msg = NULL;
 519         }
 520
 521         if (msg == NULL) {
 522                 cprintf("%d Revision history for '%s' was not found.\n", ERROR+MESSAGE_NOT_FOUND, pagename);
 523                 return;
 524         }
 525
 526         /* Start patching backwards (newest to oldest) through the revision history until we
 527          * hit the revision uuid requested by the user.  (The callback will perform each one.)
 528          */
 529
 530         memset(&hecbd, 0, sizeof(struct HistoryEraserCallBackData));
 531         hecbd.tempfilename = temp;
 532         hecbd.stop_when = rev;
 533
 534         mime_parser(msg->cm_fields['M'], NULL, *wiki_rev_callback, NULL, NULL, (void *)&hecbd, 0);
 535         CtdlFreeMessage(msg);
 536
 537         /* Were we successful? */
 538         if (hecbd.done == 0) {
 539                 cprintf("%d Revision '%s' of page '%s' was not found.\n",
 540                         ERROR + MESSAGE_NOT_FOUND, rev, pagename
 541                 );
 542         }
 543
 544         /* We have the desired revision on disk.  Now do something with it. */
 545
 546         else if ( (!strcasecmp(operation, "fetch")) || (!strcasecmp(operation, "revert")) ) {
 547                 msg = malloc(sizeof(struct CtdlMessage));
 548                 memset(msg, 0, sizeof(struct CtdlMessage));
 549                 msg->cm_magic = CTDLMESSAGE_MAGIC;
 550                 msg->cm_anon_type = MES_NORMAL;
 551                 msg->cm_format_type = FMT_RFC822;
 552                 fp = fopen(temp, "r");
 553                 if (fp) {
 554                         fseek(fp, 0L, SEEK_END);
 555                         len = ftell(fp);
 556                         fseek(fp, 0L, SEEK_SET);
 557                         msg->cm_fields['M'] = malloc(len + 1);
 558                         rv = fread(msg->cm_fields['M'], len, 1, fp);
 559                         CtdlLogPrintf(CTDL_DEBUG, "\033[32mdid %d blocks of %d bytes\033[0m\n", rv, len);
 560                         msg->cm_fields['M'][len] = 0;
 561                         fclose(fp);
 562                 }
 563                 if (len <= 0) {
 564                         msgnum = (-1L);
 565                 }
 566                 else if (!strcasecmp(operation, "fetch")) {
 567                         msg->cm_fields['A'] = strdup("Citadel");
 568                         CtdlCreateRoom(wwm, 5, "", 0, 1, 1, VIEW_BBS);  /* Not an error if already exists */
 569                         msgnum = CtdlSubmitMsg(msg, NULL, wwm, 0);      /* Store the revision here */
 570                 }
 571                 else if (!strcasecmp(operation, "revert")) {
 572                         snprintf(timestamp, sizeof timestamp, "%ld", time(NULL));
 573                         msg->cm_fields['T'] = strdup(timestamp);
 574                         msg->cm_fields['A'] = strdup(CC->user.fullname);
 575                         msg->cm_fields['F'] = strdup(CC->cs_inet_email);
 576                         msg->cm_fields['O'] = strdup(CC->room.QRname);
 577                         msg->cm_fields['N'] = strdup(NODENAME);
 578                         msg->cm_fields['E'] = strdup(pagename);
 579                         msgnum = CtdlSubmitMsg(msg, NULL, "", 0);       /* Replace the current revision */
 580                 }
 581                 else {
 582                         /* Theoretically it is impossible to get here, but throw an error anyway */
 583                         msgnum = (-1L);
 584                 }
 585                 CtdlFreeMessage(msg);
 586                 if (msgnum >= 0L) {
 587                         cprintf("%d %ld\n", CIT_OK, msgnum);            /* Give the client a msgnum */
 588                 }
 589                 else {
 590                         cprintf("%d Error %ld has occurred.\n", ERROR+INTERNAL_ERROR, msgnum);
 591                 }
 592         }
 593
 594         /* We did all this work for nothing.  Express anguish to the caller. */
 595         else {
 596                 cprintf("%d An unknown operation was requested.\n", ERROR+CMD_NOT_SUPPORTED);
 597         }
 598
 599         unlink(temp);
 600         return;
 601 }
 602
 603
 604
 605 /*
 606  * commands related to wiki management
 607  */
 608 void cmd_wiki(char *argbuf) {
 609         char subcmd[32];
 610         char pagename[256];
 611         char rev[128];
 612         char operation[16];
 613
 614         extract_token(subcmd, argbuf, 0, '|', sizeof subcmd);
 615
 616         if (!strcasecmp(subcmd, "history")) {
 617                 extract_token(pagename, argbuf, 1, '|', sizeof pagename);
 618                 wiki_history(pagename);
 619                 return;
 620         }
 621
 622         if (!strcasecmp(subcmd, "rev")) {
 623                 extract_token(pagename, argbuf, 1, '|', sizeof pagename);
 624                 extract_token(rev, argbuf, 2, '|', sizeof rev);
 625                 extract_token(operation, argbuf, 3, '|', sizeof operation);
 626                 wiki_rev(pagename, rev, operation);
 627                 return;
 628         }
 629
 630         cprintf("%d Invalid subcommand\n", ERROR + CMD_NOT_SUPPORTED);
 631 }
 632
 633
 634
 635 /*
 636  * Module initialization
 637  */
 638 CTDL_MODULE_INIT(wiki)
 639 {
 640         if (!threading)
 641         {
 642                 CtdlRegisterMessageHook(wiki_upload_beforesave, EVT_BEFORESAVE);
 643                 CtdlRegisterProtoHook(cmd_wiki, "WIKI", "Commands related to Wiki management");
 644         }
 645
 646         /* return our Subversion id for the Log */
 647         return "$Id$";
 648 }