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 CleanupFunctionHook *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 = CleanupHookTable; fcn != NULL; fcn = fcn->next) {
  58                 (*fcn->h_function_pointer)();
  59                 }
  60
  61         /* Close databases */
  62         lprintf(7, "Closing databases\n");
  63         close_databases();
  64
  65         /* Do system-dependent stuff */
  66         sysdep_master_cleanup();
  67
  68         /* Now go away. */
  69         lprintf(3, "citserver: exiting.\n");
  70         exit(0);
  71         }
  72
  73
  74 /*
  75  * Gracefully terminate the session and thread.
  76  * (This is called as a cleanup handler by the thread library.)
  77  *
  78  * All NON-system-dependent stuff is done in this function.
  79  * System-dependent session/thread cleanup is in cleanup() in sysdep.c
  80  */
  81 void cleanup_stuff(void *arg)
  82 {
  83         struct ExpressMessage *emptr;
  84         struct SessionFunctionHook *fcn;
  85
  86         lprintf(9, "cleanup_stuff() called\n");
  87
  88         lprintf(7, "Calling logout(%d)\n", CC->cs_pid);
  89         logout(CC);
  90
  91         rec_log(CL_TERMINATE,CC->curr_user);
  92         unlink(CC->temp);
  93         lprintf(3, "citserver[%3d]: ended.\n",CC->cs_pid);
  94
  95         /* Run any cleanup routines registered by loadable modules */
  96         for (fcn = SessionHookTable; fcn != NULL; fcn = fcn->next) {
  97                 if (fcn->startstop == 0) {
  98                         (*fcn->h_function_pointer)(CC->cs_pid);
  99                         }
 100                 }
 101
 102         syslog(LOG_NOTICE,"session %d ended", CC->cs_pid);
 103
 104         /* Deallocate any unsent express messages */
 105         begin_critical_section(S_SESSION_TABLE);
 106         while (CC->FirstExpressMessage != NULL) {
 107                 emptr = CC->FirstExpressMessage;
 108                 CC->FirstExpressMessage = CC->FirstExpressMessage->next;
 109                 free(emptr);
 110                 }
 111         end_critical_section(S_SESSION_TABLE);
 112
 113         /* Deallocate any message list we might have in memory */
 114         if (CC->msglist != NULL) free(CC->msglist);
 115
 116         /* Now get rid of the session and context */
 117         lprintf(7, "cleanup_stuff() is calling RemoveContext(%d)\n", CC->cs_pid);
 118         RemoveContext(CC);
 119
 120         /* While we still have an extra thread with no user attached to it,
 121          * take the opportunity to do some housekeeping before exiting.
 122          */
 123         do_housekeeping();
 124         }
 125
 126
 127 /*
 128  * set_wtmpsupp()  -  alter the session listing
 129  */
 130 void set_wtmpsupp(char *newtext)
 131 {
 132         struct NewRoomFunctionHook *fcn;
 133
 134         strncpy(CC->cs_room,newtext,19);
 135         CC->cs_room[19] = 0;
 136         time(&CC->cs_lastupdt);
 137
 138         /* Run any routines registered by loadable modules */
 139         for (fcn = NewRoomHookTable; fcn != NULL; fcn = fcn->next) {
 140                 (*fcn->h_function_pointer)(CC->cs_room);
 141                 }
 142         }
 143
 144
 145 /*
 146  * cmd_info()  -  tell the client about this server
 147  */
 148 void cmd_info(void) {
 149         cprintf("%d Server info:\n",LISTING_FOLLOWS);
 150         cprintf("%d\n",CC->cs_pid);
 151         cprintf("%s\n",config.c_nodename);
 152         cprintf("%s\n",config.c_humannode);
 153         cprintf("%s\n",config.c_fqdn);
 154         cprintf("%s\n",CITADEL);
 155         cprintf("%d\n",REV_LEVEL);
 156         cprintf("%s\n",config.c_bbs_city);
 157         cprintf("%s\n",config.c_sysadm);
 158         cprintf("%d\n",SERVER_TYPE);
 159         cprintf("%s\n",config.c_moreprompt);
 160         cprintf("1\n"); /* 1 = yes, this system supports floors */
 161         cprintf("000\n");
 162         }
 163
 164 void cmd_rchg(char *newroomname)
 165 {
 166    if ((newroomname) && (newroomname[0]))
 167    {
 168       bzero(CC->fake_roomname, 20);
 169       strncpy(CC->fake_roomname, newroomname, 19);
 170    }
 171    else
 172       CC->fake_roomname[0] = '\0';
 173    cprintf("%d\n",OK);
 174 }
 175
 176 void cmd_hchg(char *newhostname)
 177 {
 178    if ((newhostname) && (newhostname[0]))
 179    {
 180       bzero(CC->fake_hostname, 25);
 181       strncpy(CC->fake_hostname, newhostname, 24);
 182    }
 183    else
 184       CC->fake_hostname[0] = '\0';
 185    cprintf("%d\n",OK);
 186 }
 187
 188 void cmd_uchg(char *newusername)
 189 {
 190    if (CC->usersupp.axlevel < 6)
 191    {
 192       cprintf("%d You must be an Aide to use UCHG.\n",
 193                 ERROR+HIGHER_ACCESS_REQUIRED);
 194       return;
 195    }
 196    if ((newusername) && (newusername[0]))
 197    {
 198       CC->cs_flags &= ~CS_STEALTH;
 199       bzero(CC->fake_username, 32);
 200       if (strncasecmp(newusername, CC->curr_user, strlen(CC->curr_user)))
 201          strncpy(CC->fake_username, newusername, 31);
 202    }
 203    else
 204    {
 205       CC->fake_username[0] = '\0';
 206       CC->cs_flags |= CS_STEALTH;
 207    }
 208    cprintf("%d\n",OK);
 209 }
 210
 211 /*
 212  * returns an asterisk if there are any express messages waiting,
 213  * space otherwise.
 214  */
 215 char check_express(void) {
 216         if (CC->FirstExpressMessage == NULL) {
 217                 return(' ');
 218                 }
 219         else {
 220                 return('*');
 221                 }
 222         }
 223
 224 void cmd_time(void)
 225 {
 226    time_t tv;
 227
 228    tv = time(NULL);
 229
 230    cprintf("%d %ld\n", OK, tv);
 231 }
 232
 233 /*
 234  * check a hostname against the public_clients file
 235  */
 236 int is_public_client(char *where)
 237 {
 238         char buf[256];
 239         FILE *fp;
 240
 241         if (!strcasecmp(where,"localhost")) return(1);
 242         if (!strcasecmp(where,config.c_fqdn)) return(1);
 243
 244         fp = fopen("public_clients","r");
 245         if (fp == NULL) return(0);
 246
 247         while (fgets(buf,256,fp)!=NULL) {
 248                 while (isspace((buf[strlen(buf)-1])))
 249                         buf[strlen(buf)-1] = 0;
 250                 if (!strcasecmp(buf,where)) {
 251                         fclose(fp);
 252                         return(1);
 253                         }
 254                 }
 255
 256         fclose(fp);
 257         return(0);
 258         }
 259
 260
 261 /*
 262  * the client is identifying itself to the server
 263  */
 264 void cmd_iden(char *argbuf)
 265 {
 266         int dev_code;
 267         int cli_code;
 268         int rev_level;
 269         char desc[256];
 270         char from_host[256];
 271
 272         if (num_parms(argbuf)<4) {
 273                 cprintf("%d usage error\n",ERROR);
 274                 return;
 275                 }
 276
 277         dev_code = extract_int(argbuf,0);
 278         cli_code = extract_int(argbuf,1);
 279         rev_level = extract_int(argbuf,2);
 280         extract(desc,argbuf,3);
 281
 282         strcpy(from_host,config.c_fqdn);
 283         if (num_parms(argbuf)>=5) extract(from_host,argbuf,4);
 284
 285         CC->cs_clientdev = dev_code;
 286         CC->cs_clienttyp = cli_code;
 287         CC->cs_clientver = rev_level;
 288         strncpy(CC->cs_clientname,desc,31);
 289         CC->cs_clientname[31] = 0;
 290
 291         if ((strlen(from_host)>0) &&
 292            (is_public_client(CC->cs_host))) {
 293                 strncpy(CC->cs_host,from_host,24);
 294                 CC->cs_host[24] = 0;
 295                 }
 296         set_wtmpsupp(CC->quickroom.QRname);
 297
 298         syslog(LOG_NOTICE,"client %d/%d/%01d.%02d (%s)\n",
 299                 dev_code,
 300                 cli_code,
 301                 (rev_level / 100),
 302                 (rev_level % 100),
 303                 desc);
 304                 cprintf("%d Ok\n",OK);
 305         }
 306
 307
 308 /*
 309  * enter or exit "stealth mode"
 310  */
 311 void cmd_stel(char *cmdbuf)
 312 {
 313         int requested_mode;
 314
 315         requested_mode = extract_int(cmdbuf,0);
 316         if (requested_mode !=0) requested_mode = 1;
 317
 318         if (!CC->logged_in) {
 319                 cprintf("%d Not logged in.\n",ERROR+NOT_LOGGED_IN);
 320                 return;
 321                 }
 322
 323         if (CC->usersupp.axlevel < 6) {
 324                 cprintf("%d You must be an Aide to use stealth mode.\n",
 325                         ERROR+HIGHER_ACCESS_REQUIRED);
 326                 return;
 327                 }
 328
 329         if (CC->cs_flags & CS_STEALTH) {
 330                 if (requested_mode == 0)
 331                         CC->cs_flags = CC->cs_flags-CS_STEALTH;
 332                 }
 333         else {
 334                 if (requested_mode == 1)
 335                         CC->cs_flags = CC->cs_flags|CS_STEALTH;
 336                 }
 337
 338         set_wtmpsupp(CC->quickroom.QRname);
 339         cprintf("%d Ok\n",OK);
 340         }
 341
 342
 343
 344
 345 /*
 346  * display system messages or help
 347  */
 348 void cmd_mesg(char *mname)
 349 {
 350         FILE *mfp;
 351         char targ[256];
 352         char buf[256];
 353         char *dirs[2];
 354
 355         extract(buf,mname,0);
 356
 357
 358         dirs[0]=malloc(64);
 359         dirs[1]=malloc(64);
 360         strcpy(dirs[0],"messages");
 361         strcpy(dirs[1],"help");
 362         mesg_locate(targ,buf,2,dirs);
 363         free(dirs[0]);
 364         free(dirs[1]);
 365
 366
 367         if (strlen(targ)==0) {
 368                 cprintf("%d '%s' not found.\n",ERROR,mname);
 369                 return;
 370                 }
 371
 372         mfp = fopen(targ,"r");
 373         if (mfp==NULL) {
 374                 cprintf("%d Cannot open '%s': %s\n",
 375                         ERROR,targ,strerror(errno));
 376                 return;
 377                 }
 378         cprintf("%d %s\n",LISTING_FOLLOWS,buf);
 379
 380         while (fgets(buf,255,mfp)!=NULL) {
 381                 buf[strlen(buf)-1] = 0;
 382                 do_help_subst(buf);
 383                 cprintf("%s\n",buf);
 384                 }
 385
 386         fclose(mfp);
 387         cprintf("000\n");
 388         }
 389
 390
 391 /*
 392  * enter system messages or help
 393  */
 394 void cmd_emsg(char *mname)
 395 {
 396         FILE *mfp;
 397         char targ[256];
 398         char buf[256];
 399         char *dirs[2];
 400         int a;
 401
 402         if (CC->usersupp.axlevel < 6) {
 403                 cprintf("%d You must be an Aide to edit system messages.\n",
 404                         ERROR+HIGHER_ACCESS_REQUIRED);
 405                 return;
 406                 }
 407
 408         extract(buf,mname,0);
 409         for (a=0; a<strlen(buf); ++a) {         /* security measure */
 410                 if (buf[a] == '/') buf[a] = '.';
 411                 }
 412
 413         dirs[0]=malloc(64);
 414         dirs[1]=malloc(64);
 415         strcpy(dirs[0],"messages");
 416         strcpy(dirs[1],"help");
 417         mesg_locate(targ,buf,2,dirs);
 418         free(dirs[0]);
 419         free(dirs[1]);
 420
 421         if (strlen(targ)==0) {
 422                 sprintf(targ, "./help/%s", buf);
 423                 }
 424
 425         mfp = fopen(targ,"w");
 426         if (mfp==NULL) {
 427                 cprintf("%d Cannot open '%s': %s\n",
 428                         ERROR,targ,strerror(errno));
 429                 return;
 430                 }
 431         cprintf("%d %s\n", SEND_LISTING, targ);
 432
 433         while (client_gets(buf), strcmp(buf, "000")) {
 434                 fprintf(mfp, "%s\n", buf);
 435                 }
 436
 437         fclose(mfp);
 438         }
 439
 440
 441 /*
 442  * who's online
 443  */
 444 void cmd_rwho(void) {
 445         struct CitContext *cptr;
 446         int spoofed = 0;
 447         int aide;
 448         char un[40], room[40], host[40], flags[5];
 449
 450         aide = CC->usersupp.axlevel >= 6;
 451         cprintf("%d\n",LISTING_FOLLOWS);
 452
 453         for (cptr = ContextList; cptr != NULL; cptr = cptr->next)
 454         {
 455                 flags[0] = '\0';
 456                 spoofed = 0;
 457
 458                 if (cptr->cs_flags & CS_POSTING)
 459                    strcat(flags, "*");
 460                 else
 461                    strcat(flags, ".");
 462
 463                 if (cptr->fake_username[0])
 464                 {
 465                    strcpy(un, cptr->fake_username);
 466                    spoofed = 1;
 467                 }
 468                 else
 469                    strcpy(un, cptr->curr_user);
 470
 471                 if (cptr->fake_hostname[0])
 472                 {
 473                    strcpy(host, cptr->fake_hostname);
 474                    spoofed = 1;
 475                 }
 476                 else
 477                    strcpy(host, cptr->cs_host);
 478
 479                 if (cptr->fake_roomname[0])
 480                 {
 481                    strcpy(room, cptr->fake_roomname);
 482                    spoofed = 1;
 483                 }
 484                 else
 485                    strcpy(room, cptr->cs_room);
 486
 487
 488                 if ((aide) && (spoofed))
 489                    strcat(flags, "+");
 490
 491                 if ((cptr->cs_flags & CS_STEALTH) && (aide))
 492                    strcat(flags, "-");
 493
 494                 if (((cptr->cs_flags&CS_STEALTH)==0) || (aide))
 495                 {
 496                         cprintf("%d|%s|%s|%s|%s|%ld|%s|%s\n",
 497                                 cptr->cs_pid, un, room,
 498                                 host, cptr->cs_clientname,
 499                                 (long)(cptr->lastidle),
 500                                 cptr->lastcmdname, flags);
 501                 }
 502                 if ((spoofed) && (aide))
 503                 {
 504                         cprintf("%d|%s|%s|%s|%s|%ld|%s|%s\n",
 505                                 cptr->cs_pid, cptr->curr_user, cptr->cs_room,
 506                                 cptr->cs_host, cptr->cs_clientname,
 507                                 (long)(cptr->lastidle),
 508                                 cptr->lastcmdname, flags);
 509
 510                 }
 511         }
 512         cprintf("000\n");
 513         }
 514
 515
 516 /*
 517  * Terminate another running session
 518  */
 519 void cmd_term(char *cmdbuf)
 520 {
 521         int session_num;
 522         struct CitContext *ccptr;
 523
 524         if (!CC->logged_in) {
 525                 cprintf("%d Not logged in.\n",ERROR+NOT_LOGGED_IN);
 526                 return;
 527                 }
 528
 529         if (CC->usersupp.axlevel < 6) {
 530                 cprintf("%d You must be an Aide to terminate sessions.\n",
 531                         ERROR+HIGHER_ACCESS_REQUIRED);
 532                 return;
 533                 }
 534
 535         session_num = extract_int(cmdbuf, 0);
 536         if (session_num == CC->cs_pid) {
 537                 cprintf("%d You can't kill your own session.\n", ERROR);
 538                 return;
 539                 }
 540
 541         for (ccptr = ContextList; ccptr != NULL; ccptr = ccptr->next) {
 542                 if (session_num == ccptr->cs_pid) {
 543                         kill_session(ccptr->cs_pid);
 544                         cprintf("%d Session terminated.\n", OK);
 545                         return;
 546                         }
 547                 }
 548
 549         cprintf("%d No such session.\n", ERROR);
 550         }
 551
 552
 553
 554
 555
 556 /*
 557  * get the paginator prompt
 558  */
 559 void cmd_more(void) {
 560         cprintf("%d %s\n",OK,config.c_moreprompt);
 561         }
 562
 563 /*
 564  * echo
 565  */
 566 void cmd_echo(char *etext)
 567 {
 568         cprintf("%d %s\n",OK,etext);
 569         }
 570
 571
 572
 573 /*
 574  * identify as internal program
 575  */
 576 void cmd_ipgm(char *argbuf)
 577 {
 578         int secret;
 579
 580         secret = extract_int(argbuf, 0);
 581         if (secret == config.c_ipgm_secret) {
 582                 CC->internal_pgm = 1;
 583                 strcpy(CC->curr_user, "<internal program>");
 584                 CC->cs_flags = CC->cs_flags|CS_STEALTH;
 585                 cprintf("%d Authenticated as an internal program.\n",OK);
 586                 }
 587         else {
 588                 cprintf("%d Authentication failed.\n",ERROR);
 589                 }
 590         }
 591
 592
 593 /*
 594  * Shut down the server
 595  */
 596 void cmd_down(void) {
 597         if (!CC->logged_in) {
 598                 cprintf("%d Not logged in.\n",ERROR+NOT_LOGGED_IN);
 599                 return;
 600                 }
 601
 602         if (CC->usersupp.axlevel < 6) {
 603                 cprintf("%d You must be an Aide to shut down the server.\n",
 604                         ERROR+HIGHER_ACCESS_REQUIRED);
 605                 return;
 606                 }
 607
 608         cprintf("%d Shutting down server.  Goodbye.\n", OK);
 609         master_cleanup();
 610         }
 611
 612 /*
 613  * Schedule or cancel a server shutdown
 614  */
 615 void cmd_scdn(char *argbuf)
 616 {
 617         int new_state;
 618
 619         if (!CC->logged_in) {
 620                 cprintf("%d Not logged in.\n",ERROR+NOT_LOGGED_IN);
 621                 return;
 622                 }
 623
 624         if (CC->usersupp.axlevel < 6) {
 625                 cprintf("%d You must be an Aide to schedule a shutdown.\n",
 626                         ERROR+HIGHER_ACCESS_REQUIRED);
 627                 return;
 628                 }
 629
 630         new_state = extract_int(argbuf, 0);
 631         if ((new_state == 0) || (new_state == 1)) {
 632                 ScheduledShutdown = new_state;
 633                 }
 634         cprintf("%d %d\n", OK, ScheduledShutdown);
 635         }
 636
 637
 638 /*
 639  * Run a server extension (FIX FIX FIX initial hack; polish this up)
 640  */
 641 void cmd_extn(char *argbuf) {
 642         char ExtensionName[256];
 643         int is_ipgm;
 644         int pid;
 645         char portstr[16];
 646         char ipgm[32];
 647         char sess[16];
 648
 649
 650         extract(ExtensionName, argbuf, 0);
 651         is_ipgm = extract_int(argbuf, 1);
 652
 653         pid = fork();
 654         lprintf(9, "fork() returned %d\n", pid);
 655         if (pid < 0) {
 656                 cprintf("%d fork failed: %s\n",
 657                         ERROR + INTERNAL_ERROR,
 658                         strerror(errno));
 659                 return;
 660                 }
 661         else if (pid == 0) {
 662
 663                 sprintf(portstr, "%d", config.c_port_number);
 664
 665                 if (is_ipgm)
 666                         sprintf(ipgm, "%d", config.c_ipgm_secret);
 667                 else
 668                         strcpy(ipgm, "");
 669
 670                 sprintf(sess, "%d", CC->cs_pid);
 671
 672                 execlp(ExtensionName, ExtensionName,
 673                         "localhost",                    /* server address */
 674                         portstr,                        /* port number */
 675                         ipgm,                           /* ipgm secret */
 676                         CC->usersupp.fullname,          /* user name */
 677                         CC->usersupp.password,          /* password */
 678                         CC->quickroom.QRname,           /* current room */
 679                         sess,                           /* assoc session id */
 680                         NULL);
 681
 682                 lprintf(9, "exec() failed: %s\n", strerror(errno));
 683                 exit(1);
 684                 }
 685         else {
 686                 cprintf("%d Ok\n", OK);
 687                 }
 688         }
 689
 690
 691
 692
 693 /*
 694  * main context loop
 695  */
 696 void *context_loop(struct CitContext *con)
 697 {
 698         char cmdbuf[256];
 699         int session_num;
 700         struct SessionFunctionHook *fcn;
 701
 702         /*
 703          * Wedge our way into the context table.
 704          */
 705         InitMyContext(con);
 706
 707         /*
 708          * Initialize some variables specific to our context.
 709          */
 710         CC->curr_rm = (-1);
 711         CC->logged_in = 0;
 712         CC->internal_pgm = 0;
 713         CC->download_fp = NULL;
 714         CC->upload_fp = NULL;
 715         CC->cs_pid = con->client_socket;        /* not necessarily portable */
 716         CC->FirstExpressMessage = NULL;
 717         CC->msglist = NULL;
 718         CC->num_msgs = 0;
 719         time(&CC->lastcmd);
 720         time(&CC->lastidle);
 721         strcpy(CC->lastcmdname, "    ");
 722         strcpy(CC->cs_clientname, "(unknown)");
 723         strcpy(CC->curr_user,"");
 724         strcpy(CC->net_node,"");
 725         sprintf(CC->temp,"/tmp/CitServer.%d.%d", getpid(), CC->cs_pid);
 726         strcpy(CC->cs_room, "");
 727         strcpy(CC->cs_host, config.c_fqdn);
 728         locate_host(CC->cs_host);
 729         CC->cs_flags = 0;
 730         CC->upload_type = UPL_FILE;
 731         CC->dl_is_net = 0;
 732
 733         session_num = session_count();
 734         CC->nologin = 0;
 735         if ((config.c_maxsessions > 0)&&(session_num >= config.c_maxsessions))
 736                 CC->nologin = 1;
 737
 738         if (CC->nologin==1) {
 739            cprintf("%d %s: Too many users are already online (maximum is %d)\n",
 740                 ERROR+MAX_SESSIONS_EXCEEDED,
 741                 config.c_nodename,config.c_maxsessions);
 742                 }
 743         else {
 744            cprintf("%d %s Citadel/UX server ready.\n",OK,config.c_nodename);
 745                 }
 746
 747         lprintf(3, "citserver[%3d]: started.\n", CC->cs_pid);
 748
 749         /* Run any session startup routines registered by loadable modules */
 750         for (fcn = SessionHookTable; fcn != NULL; fcn = fcn->next) {
 751                 if (fcn->startstop == 1) {
 752                         (*fcn->h_function_pointer)(CC->cs_pid);
 753                         }
 754                 }
 755
 756         rec_log(CL_CONNECT, "");
 757
 758         do {
 759                 time(&CC->lastcmd);
 760                 if (client_gets(cmdbuf) < 1) cleanup(EXIT_NULL);
 761                 lprintf(5, "citserver[%3d]: %s\n", CC->cs_pid, cmdbuf);
 762                 /* hook_command_received(CC->cs_pid, cmdbuf); FIX */
 763
 764                 /*
 765                  * Let other clients see the last command we executed, but
 766                  * exclude NOOP because that would be boring.
 767                  */
 768                 if (strncasecmp(cmdbuf, "NOOP", 4)) {
 769                         strcpy(CC->lastcmdname, "    ");
 770                         strncpy(CC->lastcmdname, cmdbuf, 4);
 771                         time(&CC->lastidle);
 772                         }
 773
 774                 if ((strncasecmp(cmdbuf, "ENT0", 4)) && (strncasecmp(cmdbuf, "MESG", 4)) && (strncasecmp(cmdbuf, "MSGS", 4)))
 775                 {
 776                    CC->cs_flags &= ~CS_POSTING;
 777                 }
 778
 779 /*
 780  * This loop recognizes all server commands.
 781  */
 782
 783                 if (!strncasecmp(cmdbuf,"NOOP",4)) {
 784                         cprintf("%d%cok\n",OK,check_express());
 785                         }
 786
 787                 else if (!strncasecmp(cmdbuf,"QUIT",4)) {
 788                         cprintf("%d Goodbye.\n",OK);
 789                         }
 790
 791                 else if (!strncasecmp(cmdbuf,"LOUT",4)) {
 792                         if (CC->logged_in) logout(CC);
 793                         cprintf("%d logged out.\n",OK);
 794                         }
 795
 796                 else if (!strncasecmp(cmdbuf,"USER",4)) {
 797                         cmd_user(&cmdbuf[5]);
 798                         }
 799
 800                 else if (!strncasecmp(cmdbuf,"PASS",4)) {
 801                         cmd_pass(&cmdbuf[5]);
 802                         }
 803
 804                 else if (!strncasecmp(cmdbuf,"NEWU",4)) {
 805                         cmd_newu(&cmdbuf[5]);
 806                         }
 807
 808                 else if (!strncasecmp(cmdbuf,"SETP",4)) {
 809                         cmd_setp(&cmdbuf[5]);
 810                         }
 811
 812                 else if (!strncasecmp(cmdbuf,"LRMS",4)) {
 813                         cmd_lrms(&cmdbuf[5]);
 814                         }
 815
 816                 else if (!strncasecmp(cmdbuf,"LKRA",4)) {
 817                         cmd_lkra(&cmdbuf[5]);
 818                         }
 819
 820                 else if (!strncasecmp(cmdbuf,"LKRN",4)) {
 821                         cmd_lkrn(&cmdbuf[5]);
 822                         }
 823
 824                 else if (!strncasecmp(cmdbuf,"LKRO",4)) {
 825                         cmd_lkro(&cmdbuf[5]);
 826                         }
 827
 828                 else if (!strncasecmp(cmdbuf,"LZRM",4)) {
 829                         cmd_lzrm(&cmdbuf[5]);
 830                         }
 831
 832                 else if (!strncasecmp(cmdbuf,"GETU",4)) {
 833                         cmd_getu();
 834                         }
 835
 836                 else if (!strncasecmp(cmdbuf,"SETU",4)) {
 837                         cmd_setu(&cmdbuf[5]);
 838                         }
 839
 840                 else if (!strncasecmp(cmdbuf,"GOTO",4)) {
 841                         cmd_goto(&cmdbuf[5]);
 842                         }
 843
 844                 else if (!strncasecmp(cmdbuf,"MSGS",4)) {
 845                         cmd_msgs(&cmdbuf[5]);
 846                         }
 847
 848                 else if (!strncasecmp(cmdbuf,"WHOK",4)) {
 849                         cmd_whok();
 850                         }
 851
 852                 else if (!strncasecmp(cmdbuf,"RDIR",4)) {
 853                         cmd_rdir();
 854                         }
 855
 856                 else if (!strncasecmp(cmdbuf,"MSG0",4)) {
 857                         cmd_msg0(&cmdbuf[5]);
 858                         }
 859
 860                 else if (!strncasecmp(cmdbuf,"MSG2",4)) {
 861                         cmd_msg2(&cmdbuf[5]);
 862                         }
 863
 864                 else if (!strncasecmp(cmdbuf,"MSG3",4)) {
 865                         cmd_msg3(&cmdbuf[5]);
 866                         }
 867
 868                 else if (!strncasecmp(cmdbuf,"INFO",4)) {
 869                         cmd_info();
 870                         }
 871
 872                 else if (!strncasecmp(cmdbuf,"SLRP",4)) {
 873                         cmd_slrp(&cmdbuf[5]);
 874                         }
 875
 876                 else if (!strncasecmp(cmdbuf,"INVT",4)) {
 877                         cmd_invt_kick(&cmdbuf[5],1);
 878                         }
 879
 880                 else if (!strncasecmp(cmdbuf,"KICK",4)) {
 881                         cmd_invt_kick(&cmdbuf[5],0);
 882                         }
 883
 884                 else if (!strncasecmp(cmdbuf,"GETR",4)) {
 885                         cmd_getr();
 886                         }
 887
 888                 else if (!strncasecmp(cmdbuf,"SETR",4)) {
 889                         cmd_setr(&cmdbuf[5]);
 890                         }
 891
 892                 else if (!strncasecmp(cmdbuf,"GETA",4)) {
 893                         cmd_geta();
 894                         }
 895
 896                 else if (!strncasecmp(cmdbuf,"SETA",4)) {
 897                         cmd_seta(&cmdbuf[5]);
 898                         }
 899
 900                 else if (!strncasecmp(cmdbuf,"ENT0",4)) {
 901                         cmd_ent0(&cmdbuf[5]);
 902                         }
 903
 904                 else if (!strncasecmp(cmdbuf,"ENT3",4)) {
 905                         cmd_ent3(&cmdbuf[5]);
 906                         }
 907
 908                 else if (!strncasecmp(cmdbuf,"RINF",4)) {
 909                         cmd_rinf();
 910                         }
 911
 912                 else if (!strncasecmp(cmdbuf,"DELE",4)) {
 913                         cmd_dele(&cmdbuf[5]);
 914                         }
 915
 916                 else if (!strncasecmp(cmdbuf,"KILL",4)) {
 917                         cmd_kill(&cmdbuf[5]);
 918                         }
 919
 920                 else if (!strncasecmp(cmdbuf,"CRE8",4)) {
 921                         cmd_cre8(&cmdbuf[5]);
 922                         }
 923
 924                 else if (!strncasecmp(cmdbuf,"MOVE",4)) {
 925                         cmd_move(&cmdbuf[5]);
 926                         }
 927
 928                 else if (!strncasecmp(cmdbuf,"FORG",4)) {
 929                         cmd_forg();
 930                         }
 931
 932                 else if (!strncasecmp(cmdbuf,"MESG",4)) {
 933                         cmd_mesg(&cmdbuf[5]);
 934                         }
 935
 936                 else if (!strncasecmp(cmdbuf,"EMSG",4)) {
 937                         cmd_emsg(&cmdbuf[5]);
 938                         }
 939
 940                 else if (!strncasecmp(cmdbuf,"GNUR",4)) {
 941                         cmd_gnur();
 942                         }
 943
 944                 else if (!strncasecmp(cmdbuf,"GREG",4)) {
 945                         cmd_greg(&cmdbuf[5]);
 946                         }
 947
 948                 else if (!strncasecmp(cmdbuf,"VALI",4)) {
 949                         cmd_vali(&cmdbuf[5]);
 950                         }
 951
 952                 else if (!strncasecmp(cmdbuf,"EINF",4)) {
 953                         cmd_einf(&cmdbuf[5]);
 954                         }
 955
 956                 else if (!strncasecmp(cmdbuf,"LIST",4)) {
 957                         cmd_list();
 958                         }
 959
 960                 else if (!strncasecmp(cmdbuf,"REGI",4)) {
 961                         cmd_regi();
 962                         }
 963
 964                 else if (!strncasecmp(cmdbuf,"CHEK",4)) {
 965                         cmd_chek();
 966                         }
 967
 968                 else if (!strncasecmp(cmdbuf,"DELF",4)) {
 969                         cmd_delf(&cmdbuf[5]);
 970                         }
 971
 972                 else if (!strncasecmp(cmdbuf,"MOVF",4)) {
 973                         cmd_movf(&cmdbuf[5]);
 974                         }
 975
 976                 else if (!strncasecmp(cmdbuf,"NETF",4)) {
 977                         cmd_netf(&cmdbuf[5]);
 978                         }
 979
 980                 else if (!strncasecmp(cmdbuf,"RWHO",4)) {
 981                         cmd_rwho();
 982                         }
 983
 984                 else if (!strncasecmp(cmdbuf,"OPEN",4)) {
 985                         cmd_open(&cmdbuf[5]);
 986                         }
 987
 988                 else if (!strncasecmp(cmdbuf,"CLOS",4)) {
 989                         cmd_clos();
 990                         }
 991
 992                 else if (!strncasecmp(cmdbuf,"UOPN",4)) {
 993                         cmd_uopn(&cmdbuf[5]);
 994                         }
 995
 996                 else if (!strncasecmp(cmdbuf,"UCLS",4)) {
 997                         cmd_ucls(&cmdbuf[5]);
 998                         }
 999
1000                 else if (!strncasecmp(cmdbuf,"READ",4)) {
1001                         cmd_read(&cmdbuf[5]);
1002                         }
1003
1004                 else if (!strncasecmp(cmdbuf,"WRIT",4)) {
1005                         cmd_writ(&cmdbuf[5]);
1006                         }
1007
1008                 else if (!strncasecmp(cmdbuf,"QUSR",4)) {
1009                         cmd_qusr(&cmdbuf[5]);
1010                         }
1011
1012                 else if (!strncasecmp(cmdbuf,"ECHO",4)) {
1013                         cmd_echo(&cmdbuf[5]);
1014                         }
1015
1016                 else if (!strncasecmp(cmdbuf,"OIMG",4)) {
1017                         cmd_oimg(&cmdbuf[5]);
1018                         }
1019
1020                 else if (!strncasecmp(cmdbuf,"MORE",4)) {
1021                         cmd_more();
1022                         }
1023
1024                 else if (!strncasecmp(cmdbuf,"NETP",4)) {
1025                         cmd_netp(&cmdbuf[5]);
1026                         }
1027
1028                 else if (!strncasecmp(cmdbuf,"NDOP",4)) {
1029                         cmd_ndop(&cmdbuf[5]);
1030                         }
1031
1032                 else if (!strncasecmp(cmdbuf,"NUOP",4)) {
1033                         cmd_nuop(&cmdbuf[5]);
1034                         }
1035
1036                 else if (!strncasecmp(cmdbuf,"LFLR",4)) {
1037                         cmd_lflr();
1038                         }
1039
1040                 else if (!strncasecmp(cmdbuf,"CFLR",4)) {
1041                         cmd_cflr(&cmdbuf[5]);
1042                         }
1043
1044                 else if (!strncasecmp(cmdbuf,"KFLR",4)) {
1045                         cmd_kflr(&cmdbuf[5]);
1046                         }
1047
1048                 else if (!strncasecmp(cmdbuf,"EFLR",4)) {
1049                         cmd_eflr(&cmdbuf[5]);
1050                         }
1051
1052                 else if (!strncasecmp(cmdbuf,"IDEN",4)) {
1053                         cmd_iden(&cmdbuf[5]);
1054                         }
1055
1056                 else if (!strncasecmp(cmdbuf,"IPGM",4)) {
1057                         cmd_ipgm(&cmdbuf[5]);
1058                         }
1059
1060                 else if (!strncasecmp(cmdbuf,"EBIO",4)) {
1061                         cmd_ebio();
1062                         }
1063
1064                 else if (!strncasecmp(cmdbuf,"RBIO",4)) {
1065                         cmd_rbio(&cmdbuf[5]);
1066                         }
1067
1068                 else if (!strncasecmp(cmdbuf,"LBIO",4)) {
1069                         cmd_lbio();
1070                         }
1071
1072                 else if (!strncasecmp(cmdbuf,"STEL",4)) {
1073                         cmd_stel(&cmdbuf[5]);
1074                         }
1075
1076                 else if (!strncasecmp(cmdbuf,"TERM",4)) {
1077                         cmd_term(&cmdbuf[5]);
1078                         }
1079
1080                 else if (!strncasecmp(cmdbuf,"DOWN",4)) {
1081                         cmd_down();
1082                         }
1083
1084                 else if (!strncasecmp(cmdbuf,"SCDN",4)) {
1085                         cmd_scdn(&cmdbuf[5]);
1086                         }
1087
1088                 else if (!strncasecmp(cmdbuf, "NSET", 4)) {
1089                         cmd_nset(&cmdbuf[5]);
1090                         }
1091
1092                 else if (!strncasecmp(cmdbuf, "UIMG", 4)) {
1093                         cmd_uimg(&cmdbuf[5]);
1094                         }
1095
1096                 else if (!strncasecmp(cmdbuf, "UCHG", 4)) {
1097                         cmd_uchg(&cmdbuf[5]);
1098                         }
1099
1100                 else if (!strncasecmp(cmdbuf, "TIME", 4)) {
1101                         cmd_time();
1102                         }
1103
1104                 else if (!strncasecmp(cmdbuf, "HCHG", 4)) {
1105                         cmd_hchg(&cmdbuf[5]);
1106                         }
1107
1108                 else if (!strncasecmp(cmdbuf, "RCHG", 4)) {
1109                         cmd_rchg(&cmdbuf[5]);
1110                         }
1111
1112                 else if (!strncasecmp(cmdbuf, "EXTN", 4)) {
1113                         cmd_extn(&cmdbuf[5]);
1114                         }
1115
1116                 else if (!strncasecmp(cmdbuf, "AGUP", 4)) {
1117                         cmd_agup(&cmdbuf[5]);
1118                         }
1119
1120                 else if (!strncasecmp(cmdbuf, "ASUP", 4)) {
1121                         cmd_asup(&cmdbuf[5]);
1122                         }
1123
1124                 else if (!DLoader_Exec_Cmd(cmdbuf))
1125                         {
1126                            cprintf("%d Unrecognized or unsupported command.\n",
1127                                     ERROR);
1128                         }
1129
1130                 } while(strncasecmp(cmdbuf, "QUIT", 4));
1131
1132         cleanup(EXIT_NORMAL);
1133         return(NULL);
1134         }