citadel/citserver.c

   1 #include <stdlib.h>
   2 #include <unistd.h>
   3 #include <stdio.h>
   4 #include <fcntl.h>
   5 #include <signal.h>
   6 #include <time.h>
   7 #include <ctype.h>
   8 #include <string.h>
   9 #include <errno.h>
  10 #include <pthread.h>
  11 #include <syslog.h>
  12 #include <dlfcn.h>
  13 #include "citadel.h"
  14 #include "server.h"
  15 #include "sysdep_decls.h"
  16 #include "citserver.h"
  17 #include "config.h"
  18 #include "database.h"
  19 #include "housekeeping.h"
  20 #include "user_ops.h"
  21 #include "logging.h"
  22 #include "support.h"
  23 #include "msgbase.h"
  24 #include "locate_host.h"
  25 #include "room_ops.h"
  26 #include "file_ops.h"
  27 #include "dynloader.h"
  28
  29 struct CitContext *ContextList = NULL;
  30 int ScheduledShutdown = 0;
  31
  32 /*
  33  * Various things that need to be initialized at startup
  34  */
  35 void master_startup(void) {
  36         lprintf(7, "Opening databases\n");
  37         open_databases();
  38
  39         lprintf(7, "Checking floor reference counts\n");
  40         check_ref_counts();
  41
  42         }
  43
  44 /*
  45  * Cleanup routine to be called when the server is shutting down.
  46  */
  47 void master_cleanup(void) {
  48         struct FunctionHook *fcn;
  49
  50         /* Cancel all running sessions */
  51         lprintf(7, "Cancelling running sessions...\n");
  52         while (ContextList != NULL) {
  53                 kill_session(ContextList->cs_pid);
  54                 }
  55
  56         /* Run any cleanup routines registered by loadable modules */
  57         for (fcn = HookTable; fcn != NULL; fcn = fcn->next) {
  58                 if (fcn->h_type == HOOK_CLEANUP) {
  59                         (*fcn->h_function_pointer)();
  60                         }
  61                 }
  62
  63         /* Close databases */
  64         lprintf(7, "Closing databases\n");
  65         close_databases();
  66
  67         /* Do system-dependent stuff */
  68         sysdep_master_cleanup();
  69
  70         /* Now go away. */
  71         lprintf(3, "citserver: exiting.\n");
  72         exit(0);
  73         }
  74
  75
  76 /*
  77  * Gracefully terminate the session and thread.
  78  * (This is called as a cleanup handler by the thread library.)
  79  *
  80  * All NON-system-dependent stuff is done in this function.
  81  * System-dependent session/thread cleanup is in cleanup() in sysdep.c
  82  */
  83 void cleanup_stuff(void *arg)
  84 {
  85         struct ExpressMessage *emptr;
  86
  87         lprintf(9, "cleanup_stuff() called\n");
  88
  89         lprintf(7, "Calling logout(%d)\n", CC->cs_pid);
  90         logout(CC);
  91
  92         rec_log(CL_TERMINATE,CC->curr_user);
  93         unlink(CC->temp);
  94         lprintf(3, "citserver[%3d]: ended.\n",CC->cs_pid);
  95         /* hook_end_session(CC->cs_pid); FIX */
  96         syslog(LOG_NOTICE,"session %d ended", CC->cs_pid);
  97
  98         /* Deallocate any unsent express messages */
  99         begin_critical_section(S_SESSION_TABLE);
 100         while (CC->FirstExpressMessage != NULL) {
 101                 emptr = CC->FirstExpressMessage;
 102                 CC->FirstExpressMessage = CC->FirstExpressMessage->next;
 103                 free(emptr);
 104                 }
 105         end_critical_section(S_SESSION_TABLE);
 106
 107         /* Deallocate any message list we might have in memory */
 108         if (CC->msglist != NULL) free(CC->msglist);
 109
 110         /* Now get rid of the session and context */
 111         lprintf(7, "cleanup_stuff() is calling RemoveContext(%d)\n", CC->cs_pid);
 112         RemoveContext(CC);
 113
 114         /* While we still have an extra thread with no user attached to it,
 115          * take the opportunity to do some housekeeping before exiting.
 116          */
 117         do_housekeeping();
 118         }
 119
 120
 121 /*
 122  * set_wtmpsupp()  -  alter the session listing
 123  */
 124 void set_wtmpsupp(char *newtext)
 125 {
 126         strncpy(CC->cs_room,newtext,19);
 127         CC->cs_room[19] = 0;
 128         time(&CC->cs_lastupdt);
 129         /* hook_room_name(CC->cs_pid, CC->cs_room); FIX */
 130         }
 131
 132
 133 /*
 134  * cmd_info()  -  tell the client about this server
 135  */
 136 void cmd_info(void) {
 137         cprintf("%d Server info:\n",LISTING_FOLLOWS);
 138         cprintf("%d\n",CC->cs_pid);
 139         cprintf("%s\n",config.c_nodename);
 140         cprintf("%s\n",config.c_humannode);
 141         cprintf("%s\n",config.c_fqdn);
 142         cprintf("%s\n",CITADEL);
 143         cprintf("%d\n",REV_LEVEL);
 144         cprintf("%s\n",config.c_bbs_city);
 145         cprintf("%s\n",config.c_sysadm);
 146         cprintf("%d\n",SERVER_TYPE);
 147         cprintf("%s\n",config.c_moreprompt);
 148         cprintf("1\n"); /* 1 = yes, this system supports floors */
 149         cprintf("000\n");
 150         }
 151
 152 void cmd_rchg(char *newroomname)
 153 {
 154    if ((newroomname) && (newroomname[0]))
 155    {
 156       bzero(CC->fake_roomname, 20);
 157       strncpy(CC->fake_roomname, newroomname, 19);
 158    }
 159    else
 160       CC->fake_roomname[0] = '\0';
 161    cprintf("%d\n",OK);
 162 }
 163
 164 void cmd_hchg(char *newhostname)
 165 {
 166    if ((newhostname) && (newhostname[0]))
 167    {
 168       bzero(CC->fake_hostname, 25);
 169       strncpy(CC->fake_hostname, newhostname, 24);
 170    }
 171    else
 172       CC->fake_hostname[0] = '\0';
 173    cprintf("%d\n",OK);
 174 }
 175
 176 void cmd_uchg(char *newusername)
 177 {
 178    if (CC->usersupp.axlevel < 6)
 179    {
 180       cprintf("%d You must be an Aide to use UCHG.\n",
 181                 ERROR+HIGHER_ACCESS_REQUIRED);
 182       return;
 183    }
 184    if ((newusername) && (newusername[0]))
 185    {
 186       CC->cs_flags &= ~CS_STEALTH;
 187       bzero(CC->fake_username, 32);
 188       if (strncasecmp(newusername, CC->curr_user, strlen(CC->curr_user)))
 189          strncpy(CC->fake_username, newusername, 31);
 190    }
 191    else
 192    {
 193       CC->fake_username[0] = '\0';
 194       CC->cs_flags |= CS_STEALTH;
 195    }
 196    cprintf("%d\n",OK);
 197 }
 198
 199 /*
 200  * returns an asterisk if there are any express messages waiting,
 201  * space otherwise.
 202  */
 203 char check_express(void) {
 204         if (CC->FirstExpressMessage == NULL) {
 205                 return(' ');
 206                 }
 207         else {
 208                 return('*');
 209                 }
 210         }
 211
 212 void cmd_time(void)
 213 {
 214    time_t tv;
 215
 216    tv = time(NULL);
 217
 218    cprintf("%d %ld\n", OK, tv);
 219 }
 220
 221 /*
 222  * check a hostname against the public_clients file
 223  */
 224 int is_public_client(char *where)
 225 {
 226         char buf[256];
 227         FILE *fp;
 228
 229         if (!strcasecmp(where,"localhost")) return(1);
 230         if (!strcasecmp(where,config.c_fqdn)) return(1);
 231
 232         fp = fopen("public_clients","r");
 233         if (fp == NULL) return(0);
 234
 235         while (fgets(buf,256,fp)!=NULL) {
 236                 while (isspace((buf[strlen(buf)-1])))
 237                         buf[strlen(buf)-1] = 0;
 238                 if (!strcasecmp(buf,where)) {
 239                         fclose(fp);
 240                         return(1);
 241                         }
 242                 }
 243
 244         fclose(fp);
 245         return(0);
 246         }
 247
 248
 249 /*
 250  * the client is identifying itself to the server
 251  */
 252 void cmd_iden(char *argbuf)
 253 {
 254         int dev_code;
 255         int cli_code;
 256         int rev_level;
 257         char desc[256];
 258         char from_host[256];
 259
 260         if (num_parms(argbuf)<4) {
 261                 cprintf("%d usage error\n",ERROR);
 262                 return;
 263                 }
 264
 265         dev_code = extract_int(argbuf,0);
 266         cli_code = extract_int(argbuf,1);
 267         rev_level = extract_int(argbuf,2);
 268         extract(desc,argbuf,3);
 269
 270         strcpy(from_host,config.c_fqdn);
 271         if (num_parms(argbuf)>=5) extract(from_host,argbuf,4);
 272
 273         CC->cs_clientdev = dev_code;
 274         CC->cs_clienttyp = cli_code;
 275         CC->cs_clientver = rev_level;
 276         strncpy(CC->cs_clientname,desc,31);
 277         CC->cs_clientname[31] = 0;
 278
 279         if ((strlen(from_host)>0) &&
 280            (is_public_client(CC->cs_host))) {
 281                 strncpy(CC->cs_host,from_host,24);
 282                 CC->cs_host[24] = 0;
 283                 }
 284         set_wtmpsupp(CC->quickroom.QRname);
 285
 286         syslog(LOG_NOTICE,"client %d/%d/%01d.%02d (%s)\n",
 287                 dev_code,
 288                 cli_code,
 289                 (rev_level / 100),
 290                 (rev_level % 100),
 291                 desc);
 292                 cprintf("%d Ok\n",OK);
 293         }
 294
 295
 296 /*
 297  * enter or exit "stealth mode"
 298  */
 299 void cmd_stel(char *cmdbuf)
 300 {
 301         int requested_mode;
 302
 303         requested_mode = extract_int(cmdbuf,0);
 304         if (requested_mode !=0) requested_mode = 1;
 305
 306         if (!CC->logged_in) {
 307                 cprintf("%d Not logged in.\n",ERROR+NOT_LOGGED_IN);
 308                 return;
 309                 }
 310
 311         if (CC->usersupp.axlevel < 6) {
 312                 cprintf("%d You must be an Aide to use stealth mode.\n",
 313                         ERROR+HIGHER_ACCESS_REQUIRED);
 314                 return;
 315                 }
 316
 317         if (CC->cs_flags & CS_STEALTH) {
 318                 if (requested_mode == 0)
 319                         CC->cs_flags = CC->cs_flags-CS_STEALTH;
 320                 }
 321         else {
 322                 if (requested_mode == 1)
 323                         CC->cs_flags = CC->cs_flags|CS_STEALTH;
 324                 }
 325
 326         set_wtmpsupp(CC->quickroom.QRname);
 327         cprintf("%d Ok\n",OK);
 328         }
 329
 330
 331
 332
 333 /*
 334  * display system messages or help
 335  */
 336 void cmd_mesg(char *mname)
 337 {
 338         FILE *mfp;
 339         char targ[256];
 340         char buf[256];
 341         char *dirs[2];
 342
 343         extract(buf,mname,0);
 344
 345
 346         dirs[0]=malloc(64);
 347         dirs[1]=malloc(64);
 348         strcpy(dirs[0],"messages");
 349         strcpy(dirs[1],"help");
 350         mesg_locate(targ,buf,2,dirs);
 351         free(dirs[0]);
 352         free(dirs[1]);
 353
 354
 355         if (strlen(targ)==0) {
 356                 cprintf("%d '%s' not found.\n",ERROR,mname);
 357                 return;
 358                 }
 359
 360         mfp = fopen(targ,"r");
 361         if (mfp==NULL) {
 362                 cprintf("%d Cannot open '%s': %s\n",
 363                         ERROR,targ,strerror(errno));
 364                 return;
 365                 }
 366         cprintf("%d %s\n",LISTING_FOLLOWS,buf);
 367
 368         while (fgets(buf,255,mfp)!=NULL) {
 369                 buf[strlen(buf)-1] = 0;
 370                 do_help_subst(buf);
 371                 cprintf("%s\n",buf);
 372                 }
 373
 374         fclose(mfp);
 375         cprintf("000\n");
 376         }
 377
 378
 379 /*
 380  * enter system messages or help
 381  */
 382 void cmd_emsg(char *mname)
 383 {
 384         FILE *mfp;
 385         char targ[256];
 386         char buf[256];
 387         char *dirs[2];
 388         int a;
 389
 390         if (CC->usersupp.axlevel < 6) {
 391                 cprintf("%d You must be an Aide to edit system messages.\n",
 392                         ERROR+HIGHER_ACCESS_REQUIRED);
 393                 return;
 394                 }
 395
 396         extract(buf,mname,0);
 397         for (a=0; a<strlen(buf); ++a) {         /* security measure */
 398                 if (buf[a] == '/') buf[a] = '.';
 399                 }
 400
 401         dirs[0]=malloc(64);
 402         dirs[1]=malloc(64);
 403         strcpy(dirs[0],"messages");
 404         strcpy(dirs[1],"help");
 405         mesg_locate(targ,buf,2,dirs);
 406         free(dirs[0]);
 407         free(dirs[1]);
 408
 409         if (strlen(targ)==0) {
 410                 sprintf(targ, "./help/%s", buf);
 411                 }
 412
 413         mfp = fopen(targ,"w");
 414         if (mfp==NULL) {
 415                 cprintf("%d Cannot open '%s': %s\n",
 416                         ERROR,targ,strerror(errno));
 417                 return;
 418                 }
 419         cprintf("%d %s\n", SEND_LISTING, targ);
 420
 421         while (client_gets(buf), strcmp(buf, "000")) {
 422                 fprintf(mfp, "%s\n", buf);
 423                 }
 424
 425         fclose(mfp);
 426         }
 427
 428
 429 /*
 430  * who's online
 431  */
 432 void cmd_rwho(void) {
 433         struct CitContext *cptr;
 434         int spoofed = 0;
 435         int aide;
 436         char un[40], room[40], host[40], flags[5];
 437
 438         aide = CC->usersupp.axlevel >= 6;
 439         cprintf("%d\n",LISTING_FOLLOWS);
 440
 441         for (cptr = ContextList; cptr != NULL; cptr = cptr->next)
 442         {
 443                 flags[0] = '\0';
 444                 spoofed = 0;
 445
 446                 if (cptr->cs_flags & CS_POSTING)
 447                    strcat(flags, "*");
 448                 else
 449                    strcat(flags, ".");
 450
 451                 if (cptr->fake_username[0])
 452                 {
 453                    strcpy(un, cptr->fake_username);
 454                    spoofed = 1;
 455                 }
 456                 else
 457                    strcpy(un, cptr->curr_user);
 458
 459                 if (cptr->fake_hostname[0])
 460                 {
 461                    strcpy(host, cptr->fake_hostname);
 462                    spoofed = 1;
 463                 }
 464                 else
 465                    strcpy(host, cptr->cs_host);
 466
 467                 if (cptr->fake_roomname[0])
 468                 {
 469                    strcpy(room, cptr->fake_roomname);
 470                    spoofed = 1;
 471                 }
 472                 else
 473                    strcpy(room, cptr->cs_room);
 474
 475
 476                 if ((aide) && (spoofed))
 477                    strcat(flags, "+");
 478
 479                 if ((cptr->cs_flags & CS_STEALTH) && (aide))
 480                    strcat(flags, "-");
 481
 482                 if (((cptr->cs_flags&CS_STEALTH)==0) || (aide))
 483                 {
 484                         cprintf("%d|%s|%s|%s|%s|%ld|%s|%s\n",
 485                                 cptr->cs_pid, un, room,
 486                                 host, cptr->cs_clientname,
 487                                 (long)(cptr->lastidle),
 488                                 cptr->lastcmdname, flags);
 489                 }
 490                 if ((spoofed) && (aide))
 491                 {
 492                         cprintf("%d|%s|%s|%s|%s|%ld|%s|%s\n",
 493                                 cptr->cs_pid, cptr->curr_user, cptr->cs_room,
 494                                 cptr->cs_host, cptr->cs_clientname,
 495                                 (long)(cptr->lastidle),
 496                                 cptr->lastcmdname, flags);
 497
 498                 }
 499         }
 500         cprintf("000\n");
 501         }
 502
 503
 504 /*
 505  * Terminate another running session
 506  */
 507 void cmd_term(char *cmdbuf)
 508 {
 509         int session_num;
 510         struct CitContext *ccptr;
 511
 512         if (!CC->logged_in) {
 513                 cprintf("%d Not logged in.\n",ERROR+NOT_LOGGED_IN);
 514                 return;
 515                 }
 516
 517         if (CC->usersupp.axlevel < 6) {
 518                 cprintf("%d You must be an Aide to terminate sessions.\n",
 519                         ERROR+HIGHER_ACCESS_REQUIRED);
 520                 return;
 521                 }
 522
 523         session_num = extract_int(cmdbuf, 0);
 524         if (session_num == CC->cs_pid) {
 525                 cprintf("%d You can't kill your own session.\n", ERROR);
 526                 return;
 527                 }
 528
 529         for (ccptr = ContextList; ccptr != NULL; ccptr = ccptr->next) {
 530                 if (session_num == ccptr->cs_pid) {
 531                         kill_session(ccptr->cs_pid);
 532                         cprintf("%d Session terminated.\n", OK);
 533                         return;
 534                         }
 535                 }
 536
 537         cprintf("%d No such session.\n", ERROR);
 538         }
 539
 540
 541
 542
 543
 544 /*
 545  * get the paginator prompt
 546  */
 547 void cmd_more(void) {
 548         cprintf("%d %s\n",OK,config.c_moreprompt);
 549         }
 550
 551 /*
 552  * echo
 553  */
 554 void cmd_echo(char *etext)
 555 {
 556         cprintf("%d %s\n",OK,etext);
 557         }
 558
 559
 560
 561 /*
 562  * identify as internal program
 563  */
 564 void cmd_ipgm(char *argbuf)
 565 {
 566         int secret;
 567
 568         secret = extract_int(argbuf, 0);
 569         if (secret == config.c_ipgm_secret) {
 570                 CC->internal_pgm = 1;
 571                 strcpy(CC->curr_user, "<internal program>");
 572                 CC->cs_flags = CC->cs_flags|CS_STEALTH;
 573                 cprintf("%d Authenticated as an internal program.\n",OK);
 574                 }
 575         else {
 576                 cprintf("%d Authentication failed.\n",ERROR);
 577                 }
 578         }
 579
 580
 581 /*
 582  * Shut down the server
 583  */
 584 void cmd_down(void) {
 585         if (!CC->logged_in) {
 586                 cprintf("%d Not logged in.\n",ERROR+NOT_LOGGED_IN);
 587                 return;
 588                 }
 589
 590         if (CC->usersupp.axlevel < 6) {
 591                 cprintf("%d You must be an Aide to shut down the server.\n",
 592                         ERROR+HIGHER_ACCESS_REQUIRED);
 593                 return;
 594                 }
 595
 596         cprintf("%d Shutting down server.  Goodbye.\n", OK);
 597         master_cleanup();
 598         }
 599
 600 /*
 601  * Schedule or cancel a server shutdown
 602  */
 603 void cmd_scdn(char *argbuf)
 604 {
 605         int new_state;
 606
 607         if (!CC->logged_in) {
 608                 cprintf("%d Not logged in.\n",ERROR+NOT_LOGGED_IN);
 609                 return;
 610                 }
 611
 612         if (CC->usersupp.axlevel < 6) {
 613                 cprintf("%d You must be an Aide to schedule a shutdown.\n",
 614                         ERROR+HIGHER_ACCESS_REQUIRED);
 615                 return;
 616                 }
 617
 618         new_state = extract_int(argbuf, 0);
 619         if ((new_state == 0) || (new_state == 1)) {
 620                 ScheduledShutdown = new_state;
 621                 }
 622         cprintf("%d %d\n", OK, ScheduledShutdown);
 623         }
 624
 625
 626 /*
 627  * Run a server extension (FIX FIX FIX initial hack; polish this up)
 628  */
 629 void cmd_extn(char *argbuf) {
 630         char ExtensionName[256];
 631         int is_ipgm;
 632         int pid;
 633         char portstr[16];
 634         char ipgm[32];
 635         char sess[16];
 636
 637
 638         extract(ExtensionName, argbuf, 0);
 639         is_ipgm = extract_int(argbuf, 1);
 640
 641         pid = fork();
 642         lprintf(9, "fork() returned %d\n", pid);
 643         if (pid < 0) {
 644                 cprintf("%d fork failed: %s\n",
 645                         ERROR + INTERNAL_ERROR,
 646                         strerror(errno));
 647                 return;
 648                 }
 649         else if (pid == 0) {
 650
 651                 sprintf(portstr, "%d", config.c_port_number);
 652
 653                 if (is_ipgm)
 654                         sprintf(ipgm, "%d", config.c_ipgm_secret);
 655                 else
 656                         strcpy(ipgm, "");
 657
 658                 sprintf(sess, "%d", CC->cs_pid);
 659
 660                 execlp(ExtensionName, ExtensionName,
 661                         "localhost",                    /* server address */
 662                         portstr,                        /* port number */
 663                         ipgm,                           /* ipgm secret */
 664                         CC->usersupp.fullname,          /* user name */
 665                         CC->usersupp.password,          /* password */
 666                         CC->quickroom.QRname,           /* current room */
 667                         sess,                           /* assoc session id */
 668                         NULL);
 669
 670                 lprintf(9, "exec() failed: %s\n", strerror(errno));
 671                 exit(1);
 672                 }
 673         else {
 674                 cprintf("%d Ok\n", OK);
 675                 }
 676         }
 677
 678
 679
 680
 681 /*
 682  * main context loop
 683  */
 684 void *context_loop(struct CitContext *con)
 685 {
 686         char cmdbuf[256];
 687         int session_num;
 688
 689         /*
 690          * Wedge our way into the context table.
 691          */
 692         InitMyContext(con);
 693
 694         /*
 695          * Initialize some variables specific to our context.
 696          */
 697         CC->curr_rm = (-1);
 698         CC->logged_in = 0;
 699         CC->internal_pgm = 0;
 700         CC->download_fp = NULL;
 701         CC->upload_fp = NULL;
 702         CC->cs_pid = con->client_socket;        /* not necessarily portable */
 703         CC->FirstExpressMessage = NULL;
 704         CC->msglist = NULL;
 705         CC->num_msgs = 0;
 706         time(&CC->lastcmd);
 707         time(&CC->lastidle);
 708         strcpy(CC->lastcmdname, "    ");
 709         strcpy(CC->cs_clientname, "(unknown)");
 710         strcpy(CC->curr_user,"");
 711         strcpy(CC->net_node,"");
 712         sprintf(CC->temp,"/tmp/CitServer.%d.%d", getpid(), CC->cs_pid);
 713         strcpy(CC->cs_room, "");
 714         strcpy(CC->cs_host, config.c_fqdn);
 715         locate_host(CC->cs_host);
 716         CC->cs_flags = 0;
 717         CC->upload_type = UPL_FILE;
 718         CC->dl_is_net = 0;
 719
 720         session_num = session_count();
 721         CC->nologin = 0;
 722         if ((config.c_maxsessions > 0)&&(session_num >= config.c_maxsessions))
 723                 CC->nologin = 1;
 724
 725         if (CC->nologin==1) {
 726            cprintf("%d %s: Too many users are already online (maximum is %d)\n",
 727                 ERROR+MAX_SESSIONS_EXCEEDED,
 728                 config.c_nodename,config.c_maxsessions);
 729                 }
 730         else {
 731            cprintf("%d %s Citadel/UX server ready.\n",OK,config.c_nodename);
 732                 }
 733
 734         lprintf(3, "citserver[%3d]: started.\n", CC->cs_pid);
 735         /* hook_start_session(CC->cs_pid); FIX */
 736         rec_log(CL_CONNECT, "");
 737
 738         do {
 739                 time(&CC->lastcmd);
 740                 if (client_gets(cmdbuf) < 1) cleanup(EXIT_NULL);
 741                 lprintf(5, "citserver[%3d]: %s\n", CC->cs_pid, cmdbuf);
 742                 /* hook_command_received(CC->cs_pid, cmdbuf); FIX */
 743
 744                 /*
 745                  * Let other clients see the last command we executed, but
 746                  * exclude NOOP because that would be boring.
 747                  */
 748                 if (strncasecmp(cmdbuf, "NOOP", 4)) {
 749                         strcpy(CC->lastcmdname, "    ");
 750                         strncpy(CC->lastcmdname, cmdbuf, 4);
 751                         time(&CC->lastidle);
 752                         }
 753
 754                 if ((strncasecmp(cmdbuf, "ENT0", 4)) && (strncasecmp(cmdbuf, "MESG", 4)) && (strncasecmp(cmdbuf, "MSGS", 4)))
 755                 {
 756                    CC->cs_flags &= ~CS_POSTING;
 757                 }
 758
 759 /*
 760  * This loop recognizes all server commands.
 761  */
 762
 763                 if (!strncasecmp(cmdbuf,"NOOP",4)) {
 764                         cprintf("%d%cok\n",OK,check_express());
 765                         }
 766
 767                 else if (!strncasecmp(cmdbuf,"QUIT",4)) {
 768                         cprintf("%d Goodbye.\n",OK);
 769                         }
 770
 771                 else if (!strncasecmp(cmdbuf,"LOUT",4)) {
 772                         if (CC->logged_in) logout(CC);
 773                         cprintf("%d logged out.\n",OK);
 774                         }
 775
 776                 else if (!strncasecmp(cmdbuf,"USER",4)) {
 777                         cmd_user(&cmdbuf[5]);
 778                         }
 779
 780                 else if (!strncasecmp(cmdbuf,"PASS",4)) {
 781                         cmd_pass(&cmdbuf[5]);
 782                         }
 783
 784                 else if (!strncasecmp(cmdbuf,"NEWU",4)) {
 785                         cmd_newu(&cmdbuf[5]);
 786                         }
 787
 788                 else if (!strncasecmp(cmdbuf,"SETP",4)) {
 789                         cmd_setp(&cmdbuf[5]);
 790                         }
 791
 792                 else if (!strncasecmp(cmdbuf,"LRMS",4)) {
 793                         cmd_lrms(&cmdbuf[5]);
 794                         }
 795
 796                 else if (!strncasecmp(cmdbuf,"LKRA",4)) {
 797                         cmd_lkra(&cmdbuf[5]);
 798                         }
 799
 800                 else if (!strncasecmp(cmdbuf,"LKRN",4)) {
 801                         cmd_lkrn(&cmdbuf[5]);
 802                         }
 803
 804                 else if (!strncasecmp(cmdbuf,"LKRO",4)) {
 805                         cmd_lkro(&cmdbuf[5]);
 806                         }
 807
 808                 else if (!strncasecmp(cmdbuf,"LZRM",4)) {
 809                         cmd_lzrm(&cmdbuf[5]);
 810                         }
 811
 812                 else if (!strncasecmp(cmdbuf,"GETU",4)) {
 813                         cmd_getu();
 814                         }
 815
 816                 else if (!strncasecmp(cmdbuf,"SETU",4)) {
 817                         cmd_setu(&cmdbuf[5]);
 818                         }
 819
 820                 else if (!strncasecmp(cmdbuf,"GOTO",4)) {
 821                         cmd_goto(&cmdbuf[5]);
 822                         }
 823
 824                 else if (!strncasecmp(cmdbuf,"MSGS",4)) {
 825                         cmd_msgs(&cmdbuf[5]);
 826                         }
 827
 828                 else if (!strncasecmp(cmdbuf,"WHOK",4)) {
 829                         cmd_whok();
 830                         }
 831
 832                 else if (!strncasecmp(cmdbuf,"RDIR",4)) {
 833                         cmd_rdir();
 834                         }
 835
 836                 else if (!strncasecmp(cmdbuf,"MSG0",4)) {
 837                         cmd_msg0(&cmdbuf[5]);
 838                         }
 839
 840                 else if (!strncasecmp(cmdbuf,"MSG2",4)) {
 841                         cmd_msg2(&cmdbuf[5]);
 842                         }
 843
 844                 else if (!strncasecmp(cmdbuf,"MSG3",4)) {
 845                         cmd_msg3(&cmdbuf[5]);
 846                         }
 847
 848                 else if (!strncasecmp(cmdbuf,"INFO",4)) {
 849                         cmd_info();
 850                         }
 851
 852                 else if (!strncasecmp(cmdbuf,"SLRP",4)) {
 853                         cmd_slrp(&cmdbuf[5]);
 854                         }
 855
 856                 else if (!strncasecmp(cmdbuf,"INVT",4)) {
 857                         cmd_invt_kick(&cmdbuf[5],1);
 858                         }
 859
 860                 else if (!strncasecmp(cmdbuf,"KICK",4)) {
 861                         cmd_invt_kick(&cmdbuf[5],0);
 862                         }
 863
 864                 else if (!strncasecmp(cmdbuf,"GETR",4)) {
 865                         cmd_getr();
 866                         }
 867
 868                 else if (!strncasecmp(cmdbuf,"SETR",4)) {
 869                         cmd_setr(&cmdbuf[5]);
 870                         }
 871
 872                 else if (!strncasecmp(cmdbuf,"GETA",4)) {
 873                         cmd_geta();
 874                         }
 875
 876                 else if (!strncasecmp(cmdbuf,"SETA",4)) {
 877                         cmd_seta(&cmdbuf[5]);
 878                         }
 879
 880                 else if (!strncasecmp(cmdbuf,"ENT0",4)) {
 881                         cmd_ent0(&cmdbuf[5]);
 882                         }
 883
 884                 else if (!strncasecmp(cmdbuf,"ENT3",4)) {
 885                         cmd_ent3(&cmdbuf[5]);
 886                         }
 887
 888                 else if (!strncasecmp(cmdbuf,"RINF",4)) {
 889                         cmd_rinf();
 890                         }
 891
 892                 else if (!strncasecmp(cmdbuf,"DELE",4)) {
 893                         cmd_dele(&cmdbuf[5]);
 894                         }
 895
 896                 else if (!strncasecmp(cmdbuf,"KILL",4)) {
 897                         cmd_kill(&cmdbuf[5]);
 898                         }
 899
 900                 else if (!strncasecmp(cmdbuf,"CRE8",4)) {
 901                         cmd_cre8(&cmdbuf[5]);
 902                         }
 903
 904                 else if (!strncasecmp(cmdbuf,"MOVE",4)) {
 905                         cmd_move(&cmdbuf[5]);
 906                         }
 907
 908                 else if (!strncasecmp(cmdbuf,"FORG",4)) {
 909                         cmd_forg();
 910                         }
 911
 912                 else if (!strncasecmp(cmdbuf,"MESG",4)) {
 913                         cmd_mesg(&cmdbuf[5]);
 914                         }
 915
 916                 else if (!strncasecmp(cmdbuf,"EMSG",4)) {
 917                         cmd_emsg(&cmdbuf[5]);
 918                         }
 919
 920                 else if (!strncasecmp(cmdbuf,"GNUR",4)) {
 921                         cmd_gnur();
 922                         }
 923
 924                 else if (!strncasecmp(cmdbuf,"GREG",4)) {
 925                         cmd_greg(&cmdbuf[5]);
 926                         }
 927
 928                 else if (!strncasecmp(cmdbuf,"VALI",4)) {
 929                         cmd_vali(&cmdbuf[5]);
 930                         }
 931
 932                 else if (!strncasecmp(cmdbuf,"EINF",4)) {
 933                         cmd_einf(&cmdbuf[5]);
 934                         }
 935
 936                 else if (!strncasecmp(cmdbuf,"LIST",4)) {
 937                         cmd_list();
 938                         }
 939
 940                 else if (!strncasecmp(cmdbuf,"REGI",4)) {
 941                         cmd_regi();
 942                         }
 943
 944                 else if (!strncasecmp(cmdbuf,"CHEK",4)) {
 945                         cmd_chek();
 946                         }
 947
 948                 else if (!strncasecmp(cmdbuf,"DELF",4)) {
 949                         cmd_delf(&cmdbuf[5]);
 950                         }
 951
 952                 else if (!strncasecmp(cmdbuf,"MOVF",4)) {
 953                         cmd_movf(&cmdbuf[5]);
 954                         }
 955
 956                 else if (!strncasecmp(cmdbuf,"NETF",4)) {
 957                         cmd_netf(&cmdbuf[5]);
 958                         }
 959
 960                 else if (!strncasecmp(cmdbuf,"RWHO",4)) {
 961                         cmd_rwho();
 962                         }
 963
 964                 else if (!strncasecmp(cmdbuf,"OPEN",4)) {
 965                         cmd_open(&cmdbuf[5]);
 966                         }
 967
 968                 else if (!strncasecmp(cmdbuf,"CLOS",4)) {
 969                         cmd_clos();
 970                         }
 971
 972                 else if (!strncasecmp(cmdbuf,"UOPN",4)) {
 973                         cmd_uopn(&cmdbuf[5]);
 974                         }
 975
 976                 else if (!strncasecmp(cmdbuf,"UCLS",4)) {
 977                         cmd_ucls(&cmdbuf[5]);
 978                         }
 979
 980                 else if (!strncasecmp(cmdbuf,"READ",4)) {
 981                         cmd_read(&cmdbuf[5]);
 982                         }
 983
 984                 else if (!strncasecmp(cmdbuf,"WRIT",4)) {
 985                         cmd_writ(&cmdbuf[5]);
 986                         }
 987
 988                 else if (!strncasecmp(cmdbuf,"QUSR",4)) {
 989                         cmd_qusr(&cmdbuf[5]);
 990                         }
 991
 992                 else if (!strncasecmp(cmdbuf,"ECHO",4)) {
 993                         cmd_echo(&cmdbuf[5]);
 994                         }
 995
 996                 else if (!strncasecmp(cmdbuf,"OIMG",4)) {
 997                         cmd_oimg(&cmdbuf[5]);
 998                         }
 999
1000                 else if (!strncasecmp(cmdbuf,"MORE",4)) {
1001                         cmd_more();
1002                         }
1003
1004                 else if (!strncasecmp(cmdbuf,"NETP",4)) {
1005                         cmd_netp(&cmdbuf[5]);
1006                         }
1007
1008                 else if (!strncasecmp(cmdbuf,"NDOP",4)) {
1009                         cmd_ndop(&cmdbuf[5]);
1010                         }
1011
1012                 else if (!strncasecmp(cmdbuf,"NUOP",4)) {
1013                         cmd_nuop(&cmdbuf[5]);
1014                         }
1015
1016                 else if (!strncasecmp(cmdbuf,"LFLR",4)) {
1017                         cmd_lflr();
1018                         }
1019
1020                 else if (!strncasecmp(cmdbuf,"CFLR",4)) {
1021                         cmd_cflr(&cmdbuf[5]);
1022                         }
1023
1024                 else if (!strncasecmp(cmdbuf,"KFLR",4)) {
1025                         cmd_kflr(&cmdbuf[5]);
1026                         }
1027
1028                 else if (!strncasecmp(cmdbuf,"EFLR",4)) {
1029                         cmd_eflr(&cmdbuf[5]);
1030                         }
1031
1032                 else if (!strncasecmp(cmdbuf,"IDEN",4)) {
1033                         cmd_iden(&cmdbuf[5]);
1034                         }
1035
1036                 else if (!strncasecmp(cmdbuf,"IPGM",4)) {
1037                         cmd_ipgm(&cmdbuf[5]);
1038                         }
1039
1040                 else if (!strncasecmp(cmdbuf,"EBIO",4)) {
1041                         cmd_ebio();
1042                         }
1043
1044                 else if (!strncasecmp(cmdbuf,"RBIO",4)) {
1045                         cmd_rbio(&cmdbuf[5]);
1046                         }
1047
1048                 else if (!strncasecmp(cmdbuf,"LBIO",4)) {
1049                         cmd_lbio();
1050                         }
1051
1052                 else if (!strncasecmp(cmdbuf,"STEL",4)) {
1053                         cmd_stel(&cmdbuf[5]);
1054                         }
1055
1056                 else if (!strncasecmp(cmdbuf,"TERM",4)) {
1057                         cmd_term(&cmdbuf[5]);
1058                         }
1059
1060                 else if (!strncasecmp(cmdbuf,"DOWN",4)) {
1061                         cmd_down();
1062                         }
1063
1064                 else if (!strncasecmp(cmdbuf,"SCDN",4)) {
1065                         cmd_scdn(&cmdbuf[5]);
1066                         }
1067
1068                 else if (!strncasecmp(cmdbuf, "NSET", 4)) {
1069                         cmd_nset(&cmdbuf[5]);
1070                         }
1071
1072                 else if (!strncasecmp(cmdbuf, "UIMG", 4)) {
1073                         cmd_uimg(&cmdbuf[5]);
1074                         }
1075
1076                 else if (!strncasecmp(cmdbuf, "UCHG", 4)) {
1077                         cmd_uchg(&cmdbuf[5]);
1078                         }
1079
1080                 else if (!strncasecmp(cmdbuf, "TIME", 4)) {
1081                         cmd_time();
1082                         }
1083
1084                 else if (!strncasecmp(cmdbuf, "HCHG", 4)) {
1085                         cmd_hchg(&cmdbuf[5]);
1086                         }
1087
1088                 else if (!strncasecmp(cmdbuf, "RCHG", 4)) {
1089                         cmd_rchg(&cmdbuf[5]);
1090                         }
1091
1092                 else if (!strncasecmp(cmdbuf, "EXTN", 4)) {
1093                         cmd_extn(&cmdbuf[5]);
1094                         }
1095
1096                 else if (!strncasecmp(cmdbuf, "AGUP", 4)) {
1097                         cmd_agup(&cmdbuf[5]);
1098                         }
1099
1100                 else if (!strncasecmp(cmdbuf, "ASUP", 4)) {
1101                         cmd_asup(&cmdbuf[5]);
1102                         }
1103
1104                 else if (!DLoader_Exec_Cmd(cmdbuf))
1105                         {
1106                            cprintf("%d Unrecognized or unsupported command.\n",
1107                                     ERROR);
1108                         }
1109
1110                 } while(strncasecmp(cmdbuf, "QUIT", 4));
1111
1112         cleanup(EXIT_NORMAL);
1113         return(NULL);
1114         }