citadel/citserver.c

   1 /* $Id$ */
   2 #include <stdlib.h>
   3 #include <unistd.h>
   4 #include <stdio.h>
   5 #include <fcntl.h>
   6 #include <signal.h>
   7 #include <time.h>
   8 #include <ctype.h>
   9 #include <string.h>
  10 #include <errno.h>
  11 #include <limits.h>
  12 #include <pthread.h>
  13 #include <syslog.h>
  14 #include <dlfcn.h>
  15 #include "citadel.h"
  16 #include "server.h"
  17 #include "sysdep_decls.h"
  18 #include "citserver.h"
  19 #include "config.h"
  20 #include "database.h"
  21 #include "housekeeping.h"
  22 #include "user_ops.h"
  23 #include "logging.h"
  24 #include "support.h"
  25 #include "msgbase.h"
  26 #include "locate_host.h"
  27 #include "room_ops.h"
  28 #include "file_ops.h"
  29 #include "dynloader.h"
  30 #include "policy.h"
  31 #include "control.h"
  32
  33 struct CitContext *ContextList = NULL;
  34 int ScheduledShutdown = 0;
  35
  36 /*
  37  * Various things that need to be initialized at startup
  38  */
  39 void master_startup(void) {
  40         lprintf(7, "Opening databases\n");
  41         open_databases();
  42
  43         lprintf(7, "Checking floor reference counts\n");
  44         check_ref_counts();
  45
  46         lprintf(7, "Creating base rooms (if necessary)\n");
  47         create_room(BASEROOM, 0, "", 0);
  48         create_room(AIDEROOM, 4, "", 0);
  49         create_room(config.c_twitroom, 0, "", 0);
  50         }
  51
  52 /*
  53  * Cleanup routine to be called when the server is shutting down.
  54  */
  55 void master_cleanup(void) {
  56         struct CleanupFunctionHook *fcn;
  57
  58         /* Cancel all running sessions */
  59         lprintf(7, "Cancelling running sessions...\n");
  60         while (ContextList != NULL) {
  61                 kill_session(ContextList->cs_pid);
  62                 }
  63
  64         /* Run any cleanup routines registered by loadable modules */
  65         for (fcn = CleanupHookTable; fcn != NULL; fcn = fcn->next) {
  66                 (*fcn->h_function_pointer)();
  67                 }
  68
  69         /* Close databases */
  70         lprintf(7, "Closing databases\n");
  71         close_databases();
  72
  73         /* Do system-dependent stuff */
  74         sysdep_master_cleanup();
  75
  76         /* Now go away. */
  77         lprintf(3, "citserver: exiting.\n");
  78         fflush(stdout); fflush(stderr);
  79         exit(0);
  80         }
  81
  82
  83 /*
  84  * Gracefully terminate the session and thread.
  85  * (This is called as a cleanup handler by the thread library.)
  86  *
  87  * All NON-system-dependent stuff is done in this function.
  88  * System-dependent session/thread cleanup is in cleanup() in sysdep.c
  89  */
  90 void cleanup_stuff(void *arg)
  91 {
  92         struct ExpressMessage *emptr;
  93
  94         lprintf(9, "cleanup_stuff() called\n");
  95
  96         lprintf(7, "Calling logout(%d)\n", CC->cs_pid);
  97         logout(CC);
  98
  99         rec_log(CL_TERMINATE,CC->curr_user);
 100         unlink(CC->temp);
 101         lprintf(3, "citserver[%3d]: ended.\n",CC->cs_pid);
 102
 103         /* Run any cleanup routines registered by loadable modules */
 104         PerformSessionHooks(EVT_STOP);
 105
 106         syslog(LOG_NOTICE,"session %d ended", CC->cs_pid);
 107
 108         /* Deallocate any unsent express messages */
 109         begin_critical_section(S_SESSION_TABLE);
 110         while (CC->FirstExpressMessage != NULL) {
 111                 emptr = CC->FirstExpressMessage;
 112                 CC->FirstExpressMessage = CC->FirstExpressMessage->next;
 113                 free(emptr);
 114                 }
 115         end_critical_section(S_SESSION_TABLE);
 116
 117         /* Deallocate any message list we might have in memory */
 118         if (CC->msglist != NULL) free(CC->msglist);
 119
 120         /* Purge any stale user/room relationships */
 121         PurgeStaleRelationships();
 122
 123         /* Now get rid of the session and context */
 124         lprintf(7, "cleanup_stuff() calling RemoveContext(%d)\n", CC->cs_pid);
 125         RemoveContext(CC);
 126
 127         /* While we still have an extra thread with no user attached to it,
 128          * take the opportunity to do some housekeeping before exiting.
 129          */
 130         do_housekeeping();
 131         }
 132
 133
 134 /*
 135  * set_wtmpsupp()  -  alter the session listing
 136  */
 137 void set_wtmpsupp(char *newtext)
 138 {
 139         strncpy(CC->cs_room,newtext,sizeof CC->cs_room);
 140         CC->cs_room[sizeof CC->cs_room - 1] = 0;
 141         time(&CC->cs_lastupdt);
 142
 143         /* Run any routines registered by loadable modules */
 144         PerformSessionHooks(EVT_NEWROOM);
 145         }
 146
 147
 148 /*
 149  * call set_wtmpsupp() with the name of the current room, modified a bit...
 150  */
 151 void set_wtmpsupp_to_current_room() {
 152         if (CC->quickroom.QRflags & QR_PRIVATE) {
 153                 set_wtmpsupp("<private room>");
 154                 }
 155         else if (CC->quickroom.QRflags & QR_MAILBOX) {
 156                 set_wtmpsupp(&CC->quickroom.QRname[11]);
 157                 }
 158         else {
 159                 set_wtmpsupp(CC->quickroom.QRname);
 160                 }
 161         }
 162
 163
 164
 165 /*
 166  * cmd_info()  -  tell the client about this server
 167  */
 168 void cmd_info(void) {
 169         cprintf("%d Server info:\n",LISTING_FOLLOWS);
 170         cprintf("%d\n",CC->cs_pid);
 171         cprintf("%s\n",config.c_nodename);
 172         cprintf("%s\n",config.c_humannode);
 173         cprintf("%s\n",config.c_fqdn);
 174         cprintf("%s\n",CITADEL);
 175         cprintf("%d\n",REV_LEVEL);
 176         cprintf("%s\n",config.c_bbs_city);
 177         cprintf("%s\n",config.c_sysadm);
 178         cprintf("%d\n",SERVER_TYPE);
 179         cprintf("%s\n",config.c_moreprompt);
 180         cprintf("1\n"); /* 1 = yes, this system supports floors */
 181         cprintf("000\n");
 182         }
 183
 184 void cmd_rchg(char *argbuf)
 185 {
 186         char newroomname[ROOMNAMELEN];
 187
 188         extract(newroomname, argbuf, 0);
 189         if (strlen(newroomname) > 0) {
 190                 strncpy(CC->fake_roomname, newroomname, ROOMNAMELEN);
 191                 CC->fake_roomname[ROOMNAMELEN - 1] = 0;
 192                 }
 193         else {
 194                 strcpy(CC->fake_roomname, "");
 195                 }
 196         cprintf("%d OK\n", OK);
 197 }
 198
 199 void cmd_hchg(char *newhostname)
 200 {
 201    if ((newhostname) && (newhostname[0]))
 202    {
 203       bzero(CC->fake_hostname, 25);
 204       strncpy(CC->fake_hostname, newhostname, 24);
 205    }
 206    else
 207       strcpy(CC->fake_hostname, "");
 208    cprintf("%d OK\n",OK);
 209 }
 210
 211 void cmd_uchg(char *newusername)
 212 {
 213    if (CC->usersupp.axlevel < 6)
 214    {
 215       cprintf("%d You must be an Aide to use UCHG.\n",
 216                 ERROR+HIGHER_ACCESS_REQUIRED);
 217       return;
 218    }
 219    if ((newusername) && (newusername[0]))
 220    {
 221       CC->cs_flags &= ~CS_STEALTH;
 222       bzero(CC->fake_username, 32);
 223       if (strncasecmp(newusername, CC->curr_user, strlen(CC->curr_user)))
 224          strncpy(CC->fake_username, newusername, 31);
 225    }
 226    else
 227    {
 228       CC->fake_username[0] = '\0';
 229       CC->cs_flags |= CS_STEALTH;
 230    }
 231    cprintf("%d\n",OK);
 232 }
 233
 234 /*
 235  * returns an asterisk if there are any express messages waiting,
 236  * space otherwise.
 237  */
 238 char check_express(void) {
 239         if (CC->FirstExpressMessage == NULL) {
 240                 return(' ');
 241                 }
 242         else {
 243                 return('*');
 244                 }
 245         }
 246
 247 void cmd_time(void)
 248 {
 249    time_t tv;
 250
 251    tv = time(NULL);
 252
 253    cprintf("%d %ld\n", OK, tv);
 254 }
 255
 256 /*
 257  * check a hostname against the public_clients file
 258  */
 259 int is_public_client(char *where)
 260 {
 261         char buf[256];
 262         FILE *fp;
 263
 264         if (!strcasecmp(where,"localhost")) return(1);
 265         if (!strcasecmp(where,config.c_fqdn)) return(1);
 266
 267         fp = fopen("public_clients","r");
 268         if (fp == NULL) return(0);
 269
 270         while (fgets(buf,256,fp)!=NULL) {
 271                 while (isspace((buf[strlen(buf)-1])))
 272                         buf[strlen(buf)-1] = 0;
 273                 if (!strcasecmp(buf,where)) {
 274                         fclose(fp);
 275                         return(1);
 276                         }
 277                 }
 278
 279         fclose(fp);
 280         return(0);
 281         }
 282
 283
 284 /*
 285  * the client is identifying itself to the server
 286  */
 287 void cmd_iden(char *argbuf)
 288 {
 289         int dev_code;
 290         int cli_code;
 291         int rev_level;
 292         char desc[256];
 293         char from_host[256];
 294
 295         if (num_parms(argbuf)<4) {
 296                 cprintf("%d usage error\n",ERROR);
 297                 return;
 298                 }
 299
 300         dev_code = extract_int(argbuf,0);
 301         cli_code = extract_int(argbuf,1);
 302         rev_level = extract_int(argbuf,2);
 303         extract(desc,argbuf,3);
 304
 305         strncpy(from_host,config.c_fqdn,sizeof from_host);
 306         from_host[sizeof from_host - 1] = 0;
 307         if (num_parms(argbuf)>=5) extract(from_host,argbuf,4);
 308
 309         CC->cs_clientdev = dev_code;
 310         CC->cs_clienttyp = cli_code;
 311         CC->cs_clientver = rev_level;
 312         strncpy(CC->cs_clientname,desc,31);
 313         CC->cs_clientname[31] = 0;
 314
 315         if ((strlen(from_host)>0) &&
 316            (is_public_client(CC->cs_host))) {
 317                 strncpy(CC->cs_host,from_host,24);
 318                 CC->cs_host[24] = 0;
 319                 }
 320         set_wtmpsupp_to_current_room();
 321
 322         syslog(LOG_NOTICE,"client %d/%d/%01d.%02d (%s)\n",
 323                 dev_code,
 324                 cli_code,
 325                 (rev_level / 100),
 326                 (rev_level % 100),
 327                 desc);
 328                 cprintf("%d Ok\n",OK);
 329         }
 330
 331
 332 /*
 333  * enter or exit "stealth mode"
 334  */
 335 void cmd_stel(char *cmdbuf)
 336 {
 337         int requested_mode;
 338
 339         requested_mode = extract_int(cmdbuf,0);
 340         if (requested_mode !=0) requested_mode = 1;
 341
 342         if (!CC->logged_in) {
 343                 cprintf("%d Not logged in.\n",ERROR+NOT_LOGGED_IN);
 344                 return;
 345                 }
 346
 347         if (CC->usersupp.axlevel < 6) {
 348                 cprintf("%d You must be an Aide to use stealth mode.\n",
 349                         ERROR+HIGHER_ACCESS_REQUIRED);
 350                 return;
 351                 }
 352
 353         if (CC->cs_flags & CS_STEALTH) {
 354                 if (requested_mode == 0)
 355                         CC->cs_flags = CC->cs_flags-CS_STEALTH;
 356                 }
 357         else {
 358                 if (requested_mode == 1)
 359                         CC->cs_flags = CC->cs_flags|CS_STEALTH;
 360                 }
 361
 362         set_wtmpsupp_to_current_room();
 363         cprintf("%d Ok\n",OK);
 364         }
 365
 366
 367
 368
 369 /*
 370  * display system messages or help
 371  */
 372 void cmd_mesg(char *mname)
 373 {
 374         FILE *mfp;
 375         char targ[256];
 376         char buf[256];
 377         char *dirs[2];
 378
 379         extract(buf,mname,0);
 380
 381
 382         dirs[0]=malloc(64);
 383         dirs[1]=malloc(64);
 384         strcpy(dirs[0],"messages");
 385         strcpy(dirs[1],"help");
 386         mesg_locate(targ,buf,2,dirs);
 387         free(dirs[0]);
 388         free(dirs[1]);
 389
 390
 391         if (strlen(targ)==0) {
 392                 cprintf("%d '%s' not found.\n",ERROR,mname);
 393                 return;
 394                 }
 395
 396         mfp = fopen(targ,"r");
 397         if (mfp==NULL) {
 398                 cprintf("%d Cannot open '%s': %s\n",
 399                         ERROR,targ,strerror(errno));
 400                 return;
 401                 }
 402         cprintf("%d %s\n",LISTING_FOLLOWS,buf);
 403
 404         while (fgets(buf,255,mfp)!=NULL) {
 405                 buf[strlen(buf)-1] = 0;
 406                 do_help_subst(buf);
 407                 cprintf("%s\n",buf);
 408                 }
 409
 410         fclose(mfp);
 411         cprintf("000\n");
 412         }
 413
 414
 415 /*
 416  * enter system messages or help
 417  */
 418 void cmd_emsg(char *mname)
 419 {
 420         FILE *mfp;
 421         char targ[256];
 422         char buf[256];
 423         char *dirs[2];
 424         int a;
 425
 426         if (CC->usersupp.axlevel < 6) {
 427                 cprintf("%d You must be an Aide to edit system messages.\n",
 428                         ERROR+HIGHER_ACCESS_REQUIRED);
 429                 return;
 430                 }
 431
 432         extract(buf,mname,0);
 433         for (a=0; a<strlen(buf); ++a) {         /* security measure */
 434                 if (buf[a] == '/') buf[a] = '.';
 435                 }
 436
 437         dirs[0]=malloc(64);
 438         dirs[1]=malloc(64);
 439         strcpy(dirs[0],"messages");
 440         strcpy(dirs[1],"help");
 441         mesg_locate(targ,buf,2,dirs);
 442         free(dirs[0]);
 443         free(dirs[1]);
 444
 445         if (strlen(targ)==0) {
 446                 snprintf(targ, sizeof targ, "./help/%s", buf);
 447                 }
 448
 449         mfp = fopen(targ,"w");
 450         if (mfp==NULL) {
 451                 cprintf("%d Cannot open '%s': %s\n",
 452                         ERROR,targ,strerror(errno));
 453                 return;
 454                 }
 455         cprintf("%d %s\n", SEND_LISTING, targ);
 456
 457         while (client_gets(buf), strcmp(buf, "000")) {
 458                 fprintf(mfp, "%s\n", buf);
 459                 }
 460
 461         fclose(mfp);
 462         }
 463
 464
 465 /*
 466  * who's online
 467  */
 468 void cmd_rwho(void) {
 469         struct CitContext *cptr;
 470         int spoofed = 0;
 471         int aide;
 472         char un[40], room[40], host[40], flags[5];
 473
 474         aide = CC->usersupp.axlevel >= 6;
 475         cprintf("%d\n",LISTING_FOLLOWS);
 476
 477         for (cptr = ContextList; cptr != NULL; cptr = cptr->next)
 478         {
 479                 flags[0] = '\0';
 480                 spoofed = 0;
 481
 482                 if (cptr->cs_flags & CS_POSTING)
 483                    strcat(flags, "*");
 484                 else
 485                    strcat(flags, ".");
 486
 487                 if (cptr->fake_username[0])
 488                 {
 489                    strcpy(un, cptr->fake_username);
 490                    spoofed = 1;
 491                 }
 492                 else
 493                    strcpy(un, cptr->curr_user);
 494
 495                 if (cptr->fake_hostname[0])
 496                 {
 497                    strcpy(host, cptr->fake_hostname);
 498                    spoofed = 1;
 499                 }
 500                 else
 501                    strcpy(host, cptr->cs_host);
 502
 503                 if (cptr->fake_roomname[0])
 504                 {
 505                    strcpy(room, cptr->fake_roomname);
 506                    spoofed = 1;
 507                 }
 508                 else
 509                    strcpy(room, cptr->cs_room);
 510
 511
 512                 if ((aide) && (spoofed))
 513                    strcat(flags, "+");
 514
 515                 if ((cptr->cs_flags & CS_STEALTH) && (aide))
 516                    strcat(flags, "-");
 517
 518                 if (((cptr->cs_flags&CS_STEALTH)==0) || (aide))
 519                 {
 520                         cprintf("%d|%s|%s|%s|%s|%ld|%s|%s\n",
 521                                 cptr->cs_pid, un, room,
 522                                 host, cptr->cs_clientname,
 523                                 (long)(cptr->lastidle),
 524                                 cptr->lastcmdname, flags);
 525                 }
 526                 if ((spoofed) && (aide))
 527                 {
 528                         cprintf("%d|%s|%s|%s|%s|%ld|%s|%s\n",
 529                                 cptr->cs_pid, cptr->curr_user, cptr->cs_room,
 530                                 cptr->cs_host, cptr->cs_clientname,
 531                                 (long)(cptr->lastidle),
 532                                 cptr->lastcmdname, flags);
 533
 534                 }
 535         }
 536         cprintf("000\n");
 537         }
 538
 539
 540 /*
 541  * Terminate another running session
 542  */
 543 void cmd_term(char *cmdbuf)
 544 {
 545         int session_num;
 546         struct CitContext *ccptr;
 547
 548         if (!CC->logged_in) {
 549                 cprintf("%d Not logged in.\n",ERROR+NOT_LOGGED_IN);
 550                 return;
 551                 }
 552
 553         if (CC->usersupp.axlevel < 6) {
 554                 cprintf("%d You must be an Aide to terminate sessions.\n",
 555                         ERROR+HIGHER_ACCESS_REQUIRED);
 556                 return;
 557                 }
 558
 559         session_num = extract_int(cmdbuf, 0);
 560         if (session_num == CC->cs_pid) {
 561                 cprintf("%d You can't kill your own session.\n", ERROR);
 562                 return;
 563                 }
 564
 565         for (ccptr = ContextList; ccptr != NULL; ccptr = ccptr->next) {
 566                 if (session_num == ccptr->cs_pid) {
 567                         kill_session(ccptr->cs_pid);
 568                         cprintf("%d Session terminated.\n", OK);
 569                         return;
 570                         }
 571                 }
 572
 573         cprintf("%d No such session.\n", ERROR);
 574         }
 575
 576
 577
 578
 579
 580 /*
 581  * get the paginator prompt
 582  */
 583 void cmd_more(void) {
 584         cprintf("%d %s\n",OK,config.c_moreprompt);
 585         }
 586
 587 /*
 588  * echo
 589  */
 590 void cmd_echo(char *etext)
 591 {
 592         cprintf("%d %s\n",OK,etext);
 593         }
 594
 595
 596
 597 /*
 598  * identify as internal program
 599  */
 600 void cmd_ipgm(char *argbuf)
 601 {
 602         int secret;
 603
 604         secret = extract_int(argbuf, 0);
 605         if (secret == config.c_ipgm_secret) {
 606                 CC->internal_pgm = 1;
 607                 strcpy(CC->curr_user, "<internal program>");
 608                 CC->cs_flags = CC->cs_flags|CS_STEALTH;
 609                 cprintf("%d Authenticated as an internal program.\n",OK);
 610                 }
 611         else {
 612                 cprintf("%d Authentication failed.\n",ERROR);
 613                 }
 614         }
 615
 616
 617 /*
 618  * Shut down the server
 619  */
 620 void cmd_down(void) {
 621         if (!CC->logged_in) {
 622                 cprintf("%d Not logged in.\n",ERROR+NOT_LOGGED_IN);
 623                 return;
 624                 }
 625
 626         if (CC->usersupp.axlevel < 6) {
 627                 cprintf("%d You must be an Aide to shut down the server.\n",
 628                         ERROR+HIGHER_ACCESS_REQUIRED);
 629                 return;
 630                 }
 631
 632         cprintf("%d Shutting down server.  Goodbye.\n", OK);
 633         master_cleanup();
 634         }
 635
 636 /*
 637  * Schedule or cancel a server shutdown
 638  */
 639 void cmd_scdn(char *argbuf)
 640 {
 641         int new_state;
 642
 643         if (!CC->logged_in) {
 644                 cprintf("%d Not logged in.\n",ERROR+NOT_LOGGED_IN);
 645                 return;
 646                 }
 647
 648         if (CC->usersupp.axlevel < 6) {
 649                 cprintf("%d You must be an Aide to schedule a shutdown.\n",
 650                         ERROR+HIGHER_ACCESS_REQUIRED);
 651                 return;
 652                 }
 653
 654         new_state = extract_int(argbuf, 0);
 655         if ((new_state == 0) || (new_state == 1)) {
 656                 ScheduledShutdown = new_state;
 657                 }
 658         cprintf("%d %d\n", OK, ScheduledShutdown);
 659         }
 660
 661
 662 /*
 663  * main context loop
 664  */
 665 void *context_loop(struct CitContext *con)
 666 {
 667         char cmdbuf[256];
 668         int session_num;
 669
 670         /*
 671          * Wedge our way into the context table.
 672          */
 673         InitMyContext(con);
 674
 675         /*
 676          * Initialize some variables specific to our context.
 677          */
 678         CC->logged_in = 0;
 679         CC->internal_pgm = 0;
 680         CC->download_fp = NULL;
 681         CC->upload_fp = NULL;
 682         CC->cs_pid = con->client_socket;        /* not necessarily portable */
 683         CC->FirstExpressMessage = NULL;
 684         CC->msglist = NULL;
 685         CC->num_msgs = 0;
 686         time(&CC->lastcmd);
 687         time(&CC->lastidle);
 688         strcpy(CC->lastcmdname, "    ");
 689         strcpy(CC->cs_clientname, "(unknown)");
 690         strcpy(CC->curr_user,"");
 691         strcpy(CC->net_node,"");
 692         snprintf(CC->temp, sizeof CC->temp, "/tmp/CitServer.%d.%d", getpid(), CC->cs_pid);
 693         strcpy(CC->cs_room, "");
 694         strncpy(CC->cs_host, config.c_fqdn, sizeof CC->cs_host);
 695         CC->cs_host[sizeof CC->cs_host - 1] = 0;
 696         locate_host(CC->cs_host);
 697         CC->cs_flags = 0;
 698         CC->upload_type = UPL_FILE;
 699         CC->dl_is_net = 0;
 700
 701         session_num = session_count();
 702         CC->nologin = 0;
 703         if ((config.c_maxsessions > 0)&&(session_num >= config.c_maxsessions))
 704                 CC->nologin = 1;
 705
 706         if (CC->nologin==1) {
 707            cprintf("%d %s: Too many users are already online (maximum is %d)\n",
 708                 ERROR+MAX_SESSIONS_EXCEEDED,
 709                 config.c_nodename,config.c_maxsessions);
 710                 }
 711         else {
 712            cprintf("%d %s Citadel/UX server ready.\n",OK,config.c_nodename);
 713                 }
 714
 715         lprintf(3, "citserver[%3d]: started.\n", CC->cs_pid);
 716
 717         /* Run any session startup routines registered by loadable modules */
 718         PerformSessionHooks(EVT_START);
 719
 720         rec_log(CL_CONNECT, "");
 721
 722         do {
 723                 time(&CC->lastcmd);
 724                 bzero(cmdbuf, sizeof cmdbuf); /* Clear it, just in case */
 725                 if (client_gets(cmdbuf) < 1) cleanup(EXIT_NULL);
 726                 lprintf(5, "citserver[%3d]: %s\n", CC->cs_pid, cmdbuf);
 727
 728                 /*
 729                  * Let other clients see the last command we executed, but
 730                  * exclude NOOP because that would be boring.
 731                  */
 732                 if (strncasecmp(cmdbuf, "NOOP", 4)) {
 733                         strcpy(CC->lastcmdname, "    ");
 734                         strncpy(CC->lastcmdname, cmdbuf, 4);
 735                         time(&CC->lastidle);
 736                         }
 737
 738                 if ((strncasecmp(cmdbuf, "ENT0", 4)) && (strncasecmp(cmdbuf, "MESG", 4)) && (strncasecmp(cmdbuf, "MSGS", 4)))
 739                 {
 740                    CC->cs_flags &= ~CS_POSTING;
 741                 }
 742
 743 /*
 744  * This loop recognizes all server commands.
 745  */
 746
 747                 if (!strncasecmp(cmdbuf,"NOOP",4)) {
 748                         cprintf("%d%cok\n",OK,check_express());
 749                         }
 750
 751                 else if (!strncasecmp(cmdbuf,"QUIT",4)) {
 752                         cprintf("%d Goodbye.\n",OK);
 753                         }
 754
 755                 else if (!strncasecmp(cmdbuf,"LOUT",4)) {
 756                         if (CC->logged_in) logout(CC);
 757                         cprintf("%d logged out.\n",OK);
 758                         }
 759
 760                 else if (!strncasecmp(cmdbuf,"USER",4)) {
 761                         cmd_user(&cmdbuf[5]);
 762                         }
 763
 764                 else if (!strncasecmp(cmdbuf,"PASS",4)) {
 765                         cmd_pass(&cmdbuf[5]);
 766                         }
 767
 768                 else if (!strncasecmp(cmdbuf,"NEWU",4)) {
 769                         cmd_newu(&cmdbuf[5]);
 770                         }
 771
 772                 else if (!strncasecmp(cmdbuf,"SETP",4)) {
 773                         cmd_setp(&cmdbuf[5]);
 774                         }
 775
 776                 else if (!strncasecmp(cmdbuf,"LRMS",4)) {
 777                         cmd_lrms(&cmdbuf[5]);
 778                         }
 779
 780                 else if (!strncasecmp(cmdbuf,"LKRA",4)) {
 781                         cmd_lkra(&cmdbuf[5]);
 782                         }
 783
 784                 else if (!strncasecmp(cmdbuf,"LKRN",4)) {
 785                         cmd_lkrn(&cmdbuf[5]);
 786                         }
 787
 788                 else if (!strncasecmp(cmdbuf,"LKRO",4)) {
 789                         cmd_lkro(&cmdbuf[5]);
 790                         }
 791
 792                 else if (!strncasecmp(cmdbuf,"LZRM",4)) {
 793                         cmd_lzrm(&cmdbuf[5]);
 794                         }
 795
 796                 else if (!strncasecmp(cmdbuf,"GETU",4)) {
 797                         cmd_getu();
 798                         }
 799
 800                 else if (!strncasecmp(cmdbuf,"SETU",4)) {
 801                         cmd_setu(&cmdbuf[5]);
 802                         }
 803
 804                 else if (!strncasecmp(cmdbuf,"GOTO",4)) {
 805                         cmd_goto(&cmdbuf[5]);
 806                         }
 807
 808                 else if (!strncasecmp(cmdbuf,"MSGS",4)) {
 809                         cmd_msgs(&cmdbuf[5]);
 810                         }
 811
 812                 else if (!strncasecmp(cmdbuf,"WHOK",4)) {
 813                         cmd_whok();
 814                         }
 815
 816                 else if (!strncasecmp(cmdbuf,"RDIR",4)) {
 817                         cmd_rdir();
 818                         }
 819
 820                 else if (!strncasecmp(cmdbuf,"MSG0",4)) {
 821                         cmd_msg0(&cmdbuf[5]);
 822                         }
 823
 824                 else if (!strncasecmp(cmdbuf,"MSG2",4)) {
 825                         cmd_msg2(&cmdbuf[5]);
 826                         }
 827
 828                 else if (!strncasecmp(cmdbuf,"MSG3",4)) {
 829                         cmd_msg3(&cmdbuf[5]);
 830                         }
 831
 832                 else if (!strncasecmp(cmdbuf,"INFO",4)) {
 833                         cmd_info();
 834                         }
 835
 836                 else if (!strncasecmp(cmdbuf,"SLRP",4)) {
 837                         cmd_slrp(&cmdbuf[5]);
 838                         }
 839
 840                 else if (!strncasecmp(cmdbuf,"INVT",4)) {
 841                         cmd_invt_kick(&cmdbuf[5],1);
 842                         }
 843
 844                 else if (!strncasecmp(cmdbuf,"KICK",4)) {
 845                         cmd_invt_kick(&cmdbuf[5],0);
 846                         }
 847
 848                 else if (!strncasecmp(cmdbuf,"GETR",4)) {
 849                         cmd_getr();
 850                         }
 851
 852                 else if (!strncasecmp(cmdbuf,"SETR",4)) {
 853                         cmd_setr(&cmdbuf[5]);
 854                         }
 855
 856                 else if (!strncasecmp(cmdbuf,"GETA",4)) {
 857                         cmd_geta();
 858                         }
 859
 860                 else if (!strncasecmp(cmdbuf,"SETA",4)) {
 861                         cmd_seta(&cmdbuf[5]);
 862                         }
 863
 864                 else if (!strncasecmp(cmdbuf,"ENT0",4)) {
 865                         cmd_ent0(&cmdbuf[5]);
 866                         }
 867
 868                 else if (!strncasecmp(cmdbuf,"ENT3",4)) {
 869                         cmd_ent3(&cmdbuf[5]);
 870                         }
 871
 872                 else if (!strncasecmp(cmdbuf,"RINF",4)) {
 873                         cmd_rinf();
 874                         }
 875
 876                 else if (!strncasecmp(cmdbuf,"DELE",4)) {
 877                         cmd_dele(&cmdbuf[5]);
 878                         }
 879
 880                 else if (!strncasecmp(cmdbuf,"KILL",4)) {
 881                         cmd_kill(&cmdbuf[5]);
 882                         }
 883
 884                 else if (!strncasecmp(cmdbuf,"CRE8",4)) {
 885                         cmd_cre8(&cmdbuf[5]);
 886                         }
 887
 888                 else if (!strncasecmp(cmdbuf,"MOVE",4)) {
 889                         cmd_move(&cmdbuf[5]);
 890                         }
 891
 892                 else if (!strncasecmp(cmdbuf,"FORG",4)) {
 893                         cmd_forg();
 894                         }
 895
 896                 else if (!strncasecmp(cmdbuf,"MESG",4)) {
 897                         cmd_mesg(&cmdbuf[5]);
 898                         }
 899
 900                 else if (!strncasecmp(cmdbuf,"EMSG",4)) {
 901                         cmd_emsg(&cmdbuf[5]);
 902                         }
 903
 904                 else if (!strncasecmp(cmdbuf,"GNUR",4)) {
 905                         cmd_gnur();
 906                         }
 907
 908                 else if (!strncasecmp(cmdbuf,"GREG",4)) {
 909                         cmd_greg(&cmdbuf[5]);
 910                         }
 911
 912                 else if (!strncasecmp(cmdbuf,"VALI",4)) {
 913                         cmd_vali(&cmdbuf[5]);
 914                         }
 915
 916                 else if (!strncasecmp(cmdbuf,"EINF",4)) {
 917                         cmd_einf(&cmdbuf[5]);
 918                         }
 919
 920                 else if (!strncasecmp(cmdbuf,"LIST",4)) {
 921                         cmd_list();
 922                         }
 923
 924                 else if (!strncasecmp(cmdbuf,"REGI",4)) {
 925                         cmd_regi();
 926                         }
 927
 928                 else if (!strncasecmp(cmdbuf,"CHEK",4)) {
 929                         cmd_chek();
 930                         }
 931
 932                 else if (!strncasecmp(cmdbuf,"DELF",4)) {
 933                         cmd_delf(&cmdbuf[5]);
 934                         }
 935
 936                 else if (!strncasecmp(cmdbuf,"MOVF",4)) {
 937                         cmd_movf(&cmdbuf[5]);
 938                         }
 939
 940                 else if (!strncasecmp(cmdbuf,"NETF",4)) {
 941                         cmd_netf(&cmdbuf[5]);
 942                         }
 943
 944                 else if (!strncasecmp(cmdbuf,"RWHO",4)) {
 945                         cmd_rwho();
 946                         }
 947
 948                 else if (!strncasecmp(cmdbuf,"OPEN",4)) {
 949                         cmd_open(&cmdbuf[5]);
 950                         }
 951
 952                 else if (!strncasecmp(cmdbuf,"CLOS",4)) {
 953                         cmd_clos();
 954                         }
 955
 956                 else if (!strncasecmp(cmdbuf,"UOPN",4)) {
 957                         cmd_uopn(&cmdbuf[5]);
 958                         }
 959
 960                 else if (!strncasecmp(cmdbuf,"UCLS",4)) {
 961                         cmd_ucls(&cmdbuf[5]);
 962                         }
 963
 964                 else if (!strncasecmp(cmdbuf,"READ",4)) {
 965                         cmd_read(&cmdbuf[5]);
 966                         }
 967
 968                 else if (!strncasecmp(cmdbuf,"WRIT",4)) {
 969                         cmd_writ(&cmdbuf[5]);
 970                         }
 971
 972                 else if (!strncasecmp(cmdbuf,"QUSR",4)) {
 973                         cmd_qusr(&cmdbuf[5]);
 974                         }
 975
 976                 else if (!strncasecmp(cmdbuf,"ECHO",4)) {
 977                         cmd_echo(&cmdbuf[5]);
 978                         }
 979
 980                 else if (!strncasecmp(cmdbuf,"OIMG",4)) {
 981                         cmd_oimg(&cmdbuf[5]);
 982                         }
 983
 984                 else if (!strncasecmp(cmdbuf,"MORE",4)) {
 985                         cmd_more();
 986                         }
 987
 988                 else if (!strncasecmp(cmdbuf,"NETP",4)) {
 989                         cmd_netp(&cmdbuf[5]);
 990                         }
 991
 992                 else if (!strncasecmp(cmdbuf,"NDOP",4)) {
 993                         cmd_ndop(&cmdbuf[5]);
 994                         }
 995
 996                 else if (!strncasecmp(cmdbuf,"NUOP",4)) {
 997                         cmd_nuop(&cmdbuf[5]);
 998                         }
 999
1000                 else if (!strncasecmp(cmdbuf,"LFLR",4)) {
1001                         cmd_lflr();
1002                         }
1003
1004                 else if (!strncasecmp(cmdbuf,"CFLR",4)) {
1005                         cmd_cflr(&cmdbuf[5]);
1006                         }
1007
1008                 else if (!strncasecmp(cmdbuf,"KFLR",4)) {
1009                         cmd_kflr(&cmdbuf[5]);
1010                         }
1011
1012                 else if (!strncasecmp(cmdbuf,"EFLR",4)) {
1013                         cmd_eflr(&cmdbuf[5]);
1014                         }
1015
1016                 else if (!strncasecmp(cmdbuf,"IDEN",4)) {
1017                         cmd_iden(&cmdbuf[5]);
1018                         }
1019
1020                 else if (!strncasecmp(cmdbuf,"IPGM",4)) {
1021                         cmd_ipgm(&cmdbuf[5]);
1022                         }
1023
1024                 else if (!strncasecmp(cmdbuf,"EBIO",4)) {
1025                         cmd_ebio();
1026                         }
1027
1028                 else if (!strncasecmp(cmdbuf,"RBIO",4)) {
1029                         cmd_rbio(&cmdbuf[5]);
1030                         }
1031
1032                 else if (!strncasecmp(cmdbuf,"LBIO",4)) {
1033                         cmd_lbio();
1034                         }
1035
1036                 else if (!strncasecmp(cmdbuf,"STEL",4)) {
1037                         cmd_stel(&cmdbuf[5]);
1038                         }
1039
1040                 else if (!strncasecmp(cmdbuf,"TERM",4)) {
1041                         cmd_term(&cmdbuf[5]);
1042                         }
1043
1044                 else if (!strncasecmp(cmdbuf,"DOWN",4)) {
1045                         cmd_down();
1046                         }
1047
1048                 else if (!strncasecmp(cmdbuf,"SCDN",4)) {
1049                         cmd_scdn(&cmdbuf[5]);
1050                         }
1051
1052                 else if (!strncasecmp(cmdbuf, "NSET", 4)) {
1053                         cmd_nset(&cmdbuf[5]);
1054                         }
1055
1056                 else if (!strncasecmp(cmdbuf, "UIMG", 4)) {
1057                         cmd_uimg(&cmdbuf[5]);
1058                         }
1059
1060                 else if (!strncasecmp(cmdbuf, "UCHG", 4)) {
1061                         cmd_uchg(&cmdbuf[5]);
1062                         }
1063
1064                 else if (!strncasecmp(cmdbuf, "TIME", 4)) {
1065                         cmd_time();
1066                         }
1067
1068                 else if (!strncasecmp(cmdbuf, "HCHG", 4)) {
1069                         cmd_hchg(&cmdbuf[5]);
1070                         }
1071
1072                 else if (!strncasecmp(cmdbuf, "RCHG", 4)) {
1073                         cmd_rchg(&cmdbuf[5]);
1074                         }
1075
1076                 else if (!strncasecmp(cmdbuf, "AGUP", 4)) {
1077                         cmd_agup(&cmdbuf[5]);
1078                         }
1079
1080                 else if (!strncasecmp(cmdbuf, "ASUP", 4)) {
1081                         cmd_asup(&cmdbuf[5]);
1082                         }
1083
1084                 else if (!strncasecmp(cmdbuf, "GPEX", 4)) {
1085                         cmd_gpex(&cmdbuf[5]);
1086                         }
1087
1088                 else if (!strncasecmp(cmdbuf, "SPEX", 4)) {
1089                         cmd_spex(&cmdbuf[5]);
1090                         }
1091
1092                 else if (!strncasecmp(cmdbuf, "CONF", 4)) {
1093                         cmd_conf(&cmdbuf[5]);
1094                         }
1095
1096                 else if (!DLoader_Exec_Cmd(cmdbuf))
1097                         {
1098                            cprintf("%d Unrecognized or unsupported command.\n",
1099                                     ERROR);
1100                         }
1101
1102                 } while(strncasecmp(cmdbuf, "QUIT", 4));
1103
1104         cleanup(EXIT_NORMAL);
1105         return(NULL);
1106         }