citadel/citserver.c

   1 /* $Id$ */
   2 #include "sysdep.h"
   3 #include <stdlib.h>
   4 #include <unistd.h>
   5 #include <stdio.h>
   6 #include <fcntl.h>
   7 #include <signal.h>
   8 #include <time.h>
   9 #include <ctype.h>
  10 #include <string.h>
  11 #include <errno.h>
  12 #include <limits.h>
  13 #ifdef HAVE_PTHREAD_H
  14 #include <pthread.h>
  15 #endif
  16 #include <syslog.h>
  17 #include <dlfcn.h>
  18 #include <netdb.h>
  19 #include <sys/socket.h>
  20 #include <netinet/in.h>
  21 #include <arpa/inet.h>
  22 #include "citadel.h"
  23 #include "server.h"
  24 #include "sysdep_decls.h"
  25 #include "citserver.h"
  26 #include "config.h"
  27 #include "database.h"
  28 #include "housekeeping.h"
  29 #include "user_ops.h"
  30 #include "logging.h"
  31 #include "support.h"
  32 #include "msgbase.h"
  33 #include "locate_host.h"
  34 #include "room_ops.h"
  35 #include "file_ops.h"
  36 #include "dynloader.h"
  37 #include "policy.h"
  38 #include "control.h"
  39 #include "tools.h"
  40
  41 struct CitContext *ContextList = NULL;
  42 int ScheduledShutdown = 0;
  43
  44 /*
  45  * Various things that need to be initialized at startup
  46  */
  47 void master_startup(void) {
  48         lprintf(7, "Opening databases\n");
  49         open_databases();
  50
  51         lprintf(7, "Checking floor reference counts\n");
  52         check_ref_counts();
  53
  54         lprintf(7, "Creating base rooms (if necessary)\n");
  55         create_room(BASEROOM, 0, "", 0);
  56         create_room(AIDEROOM, 4, "", 0);
  57         create_room(config.c_twitroom, 0, "", 0);
  58         }
  59
  60 /*
  61  * Cleanup routine to be called when the server is shutting down.
  62  */
  63 void master_cleanup(void) {
  64         struct CleanupFunctionHook *fcn;
  65
  66         /* Cancel all running sessions */
  67         lprintf(7, "Cancelling running sessions...\n");
  68         while (ContextList != NULL) {
  69                 kill_session(ContextList->cs_pid);
  70                 }
  71
  72         /* Run any cleanup routines registered by loadable modules */
  73         for (fcn = CleanupHookTable; fcn != NULL; fcn = fcn->next) {
  74                 (*fcn->h_function_pointer)();
  75                 }
  76
  77         /* Close databases */
  78         lprintf(7, "Closing databases\n");
  79         close_databases();
  80
  81         /* Do system-dependent stuff */
  82         sysdep_master_cleanup();
  83
  84         /* Now go away. */
  85         lprintf(3, "citserver: exiting.\n");
  86         fflush(stdout); fflush(stderr);
  87         exit(0);
  88         }
  89
  90
  91 /*
  92  * Gracefully terminate the session and thread.
  93  * (This is called as a cleanup handler by the thread library.)
  94  *
  95  * All NON-system-dependent stuff is done in this function.
  96  * System-dependent session/thread cleanup is in cleanup() in sysdep.c
  97  */
  98 void cleanup_stuff(void *arg)
  99 {
 100
 101         lprintf(9, "cleanup_stuff() called\n");
 102
 103         lprintf(7, "Calling logout(%d)\n", CC->cs_pid);
 104         logout(CC);
 105
 106         rec_log(CL_TERMINATE,CC->curr_user);
 107         unlink(CC->temp);
 108         lprintf(3, "citserver[%3d]: ended.\n",CC->cs_pid);
 109
 110         /* Run any cleanup routines registered by loadable modules */
 111         PerformSessionHooks(EVT_STOP);
 112
 113         syslog(LOG_NOTICE,"session %d ended", CC->cs_pid);
 114
 115         /* Deallocate any message list we might have in memory */
 116         if (CC->msglist != NULL) phree(CC->msglist);
 117
 118         /* Now get rid of the session and context */
 119         lprintf(7, "cleanup_stuff() calling RemoveContext(%d)\n", CC->cs_pid);
 120         RemoveContext(CC);
 121
 122         /* While we still have an extra thread with no user attached to it,
 123          * take the opportunity to do some housekeeping before exiting.
 124          */
 125         do_housekeeping();
 126         }
 127
 128
 129 /*
 130  * set_wtmpsupp()  -  alter the session listing
 131  */
 132 void set_wtmpsupp(char *newtext)
 133 {
 134         strncpy(CC->cs_room,newtext,sizeof CC->cs_room);
 135         CC->cs_room[sizeof CC->cs_room - 1] = 0;
 136         time(&CC->cs_lastupdt);
 137
 138         /* Run any routines registered by loadable modules */
 139         PerformSessionHooks(EVT_NEWROOM);
 140         }
 141
 142
 143 /*
 144  * call set_wtmpsupp() with the name of the current room, modified a bit...
 145  */
 146 void set_wtmpsupp_to_current_room() {
 147         if (CC->quickroom.QRflags & QR_PRIVATE) {
 148                 set_wtmpsupp("<private room>");
 149                 }
 150         else if (CC->quickroom.QRflags & QR_MAILBOX) {
 151                 set_wtmpsupp(&CC->quickroom.QRname[11]);
 152                 }
 153         else {
 154                 set_wtmpsupp(CC->quickroom.QRname);
 155                 }
 156         }
 157
 158
 159
 160 /*
 161  * cmd_info()  -  tell the client about this server
 162  */
 163 void cmd_info(void) {
 164         cprintf("%d Server info:\n",LISTING_FOLLOWS);
 165         cprintf("%d\n",CC->cs_pid);
 166         cprintf("%s\n",config.c_nodename);
 167         cprintf("%s\n",config.c_humannode);
 168         cprintf("%s\n",config.c_fqdn);
 169         cprintf("%s\n",CITADEL);
 170         cprintf("%d\n",REV_LEVEL);
 171         cprintf("%s\n",config.c_bbs_city);
 172         cprintf("%s\n",config.c_sysadm);
 173         cprintf("%d\n",SERVER_TYPE);
 174         cprintf("%s\n",config.c_moreprompt);
 175         cprintf("1\n"); /* 1 = yes, this system supports floors */
 176         cprintf("1\n"); /* 1 = we support the extended paging options */
 177         cprintf("000\n");
 178         }
 179
 180 void cmd_rchg(char *argbuf)
 181 {
 182         char newroomname[256]; /* set to 256 to prevent buffer overruns <dme>*/
 183
 184         extract(newroomname, argbuf, 0);
 185         newroomname[ROOMNAMELEN] = 0;
 186         if (strlen(newroomname) > 0) {
 187                 strncpy(CC->fake_roomname, newroomname, ROOMNAMELEN);
 188                 CC->fake_roomname[ROOMNAMELEN - 1] = 0;
 189                 }
 190         else {
 191                 strcpy(CC->fake_roomname, "");
 192                 }
 193         cprintf("%d OK\n", OK);
 194 }
 195
 196 void cmd_hchg(char *newhostname)
 197 {
 198    if ((newhostname) && (newhostname[0]))
 199    {
 200       memset(CC->fake_hostname, 0, 25);
 201       strncpy(CC->fake_hostname, newhostname, 24);
 202    }
 203    else
 204       strcpy(CC->fake_hostname, "");
 205    cprintf("%d OK\n",OK);
 206 }
 207
 208 void cmd_uchg(char *newusername)
 209 {
 210    if (CC->usersupp.axlevel < 6)
 211    {
 212       cprintf("%d You must be an Aide to use UCHG.\n",
 213                 ERROR+HIGHER_ACCESS_REQUIRED);
 214       return;
 215    }
 216    if ((newusername) && (newusername[0]))
 217    {
 218       CC->cs_flags &= ~CS_STEALTH;
 219       memset(CC->fake_username, 0, 32);
 220       if (strncasecmp(newusername, CC->curr_user, strlen(CC->curr_user)))
 221          strncpy(CC->fake_username, newusername, 31);
 222    }
 223    else
 224    {
 225       CC->fake_username[0] = '\0';
 226       CC->cs_flags |= CS_STEALTH;
 227    }
 228    cprintf("%d\n",OK);
 229 }
 230
 231 /*
 232  * returns an asterisk if there are any express messages waiting,
 233  * space otherwise.
 234  */
 235 char check_express(void) {
 236         if (CC->FirstExpressMessage == NULL) {
 237                 return(' ');
 238                 }
 239         else {
 240                 return('*');
 241                 }
 242         }
 243
 244 void cmd_time(void)
 245 {
 246    time_t tv;
 247
 248    tv = time(NULL);
 249
 250    cprintf("%d %ld\n", OK, tv);
 251 }
 252
 253 /*
 254  * Check whether two hostnames match.
 255  * "Realname" should be an actual name of a client that is trying to connect;
 256  * "testname" should be the value we are comparing it with. The idea is that we
 257  * want to compare with both the abbreviated and fully-qualified versions of
 258  * "testname;" some people define "localhost" as "localhost.foo.com," etc.
 259  */
 260 static int hostnames_match(const char *realname, const char *testname) {
 261         struct hostent *he;
 262
 263         if (!strcasecmp(realname, testname))
 264                 return 1;
 265
 266         if ((he = gethostbyname(testname)) != NULL)
 267                 if (!strcasecmp(realname, he->h_name))
 268                         return 1;
 269
 270         return 0;
 271         }
 272
 273 /*
 274  * check a hostname against the public_clients file
 275  */
 276 int is_public_client(char *where)
 277 {
 278         char buf[256];
 279         FILE *fp;
 280
 281         if (hostnames_match(where,"localhost")) return(1);
 282         if (hostnames_match(where,config.c_fqdn)) return(1);
 283
 284         fp = fopen("public_clients","r");
 285         if (fp == NULL) return(0);
 286
 287         while (fgets(buf,256,fp)!=NULL) {
 288                 while (isspace((buf[strlen(buf)-1])))
 289                         buf[strlen(buf)-1] = 0;
 290                 if (hostnames_match(where,buf)) {
 291                         fclose(fp);
 292                         return(1);
 293                         }
 294                 }
 295
 296         fclose(fp);
 297         return(0);
 298         }
 299
 300
 301 /*
 302  * the client is identifying itself to the server
 303  */
 304 void cmd_iden(char *argbuf)
 305 {
 306         int dev_code;
 307         int cli_code;
 308         int rev_level;
 309         char desc[256];
 310         char from_host[256];
 311         struct in_addr addr;
 312         struct hostent *he;
 313
 314         if (num_parms(argbuf)<4) {
 315                 cprintf("%d usage error\n",ERROR);
 316                 return;
 317                 }
 318
 319         dev_code = extract_int(argbuf,0);
 320         cli_code = extract_int(argbuf,1);
 321         rev_level = extract_int(argbuf,2);
 322         extract(desc,argbuf,3);
 323
 324         strncpy(from_host,config.c_fqdn,sizeof from_host);
 325         from_host[sizeof from_host - 1] = 0;
 326         if (num_parms(argbuf)>=5) extract(from_host,argbuf,4);
 327
 328         CC->cs_clientdev = dev_code;
 329         CC->cs_clienttyp = cli_code;
 330         CC->cs_clientver = rev_level;
 331         strncpy(CC->cs_clientname,desc,31);
 332         CC->cs_clientname[31] = 0;
 333
 334         if ((strlen(from_host)>0) &&
 335            (is_public_client(CC->cs_host))) {
 336                 if (inet_aton(from_host, &addr) &&
 337                     (he = gethostbyaddr((char*)&addr, sizeof addr, AF_INET)) !=
 338                     NULL)
 339                         strncpy(CC->cs_host,he->h_name,24);
 340                 else
 341                         strncpy(CC->cs_host,from_host,24);
 342                 CC->cs_host[24] = 0;
 343                 }
 344         set_wtmpsupp_to_current_room();
 345
 346         syslog(LOG_NOTICE,"client %d/%d/%01d.%02d (%s)\n",
 347                 dev_code,
 348                 cli_code,
 349                 (rev_level / 100),
 350                 (rev_level % 100),
 351                 desc);
 352                 cprintf("%d Ok\n",OK);
 353         }
 354
 355
 356 /*
 357  * enter or exit "stealth mode"
 358  */
 359 void cmd_stel(char *cmdbuf)
 360 {
 361         int requested_mode;
 362
 363         requested_mode = extract_int(cmdbuf,0);
 364         if (requested_mode !=0) requested_mode = 1;
 365
 366         if (!CC->logged_in) {
 367                 cprintf("%d Not logged in.\n",ERROR+NOT_LOGGED_IN);
 368                 return;
 369                 }
 370
 371         if (CC->usersupp.axlevel < 6) {
 372                 cprintf("%d You must be an Aide to use stealth mode.\n",
 373                         ERROR+HIGHER_ACCESS_REQUIRED);
 374                 return;
 375                 }
 376
 377         if (CC->cs_flags & CS_STEALTH) {
 378                 if (requested_mode == 0)
 379                         CC->cs_flags = CC->cs_flags-CS_STEALTH;
 380                 }
 381         else {
 382                 if (requested_mode == 1)
 383                         CC->cs_flags = CC->cs_flags|CS_STEALTH;
 384                 }
 385
 386         set_wtmpsupp_to_current_room();
 387         cprintf("%d Ok\n",OK);
 388         }
 389
 390
 391
 392
 393 /*
 394  * display system messages or help
 395  */
 396 void cmd_mesg(char *mname)
 397 {
 398         FILE *mfp;
 399         char targ[256];
 400         char buf[256];
 401         char *dirs[2];
 402
 403         extract(buf,mname,0);
 404
 405
 406         dirs[0]=mallok(64);
 407         dirs[1]=mallok(64);
 408         strcpy(dirs[0],"messages");
 409         strcpy(dirs[1],"help");
 410         mesg_locate(targ,buf,2,dirs);
 411         phree(dirs[0]);
 412         phree(dirs[1]);
 413
 414
 415         if (strlen(targ)==0) {
 416                 cprintf("%d '%s' not found.\n",ERROR,mname);
 417                 return;
 418                 }
 419
 420         mfp = fopen(targ,"r");
 421         if (mfp==NULL) {
 422                 cprintf("%d Cannot open '%s': %s\n",
 423                         ERROR,targ,strerror(errno));
 424                 return;
 425                 }
 426         cprintf("%d %s\n",LISTING_FOLLOWS,buf);
 427
 428         while (fgets(buf,255,mfp)!=NULL) {
 429                 buf[strlen(buf)-1] = 0;
 430                 do_help_subst(buf);
 431                 cprintf("%s\n",buf);
 432                 }
 433
 434         fclose(mfp);
 435         cprintf("000\n");
 436         }
 437
 438
 439 /*
 440  * enter system messages or help
 441  */
 442 void cmd_emsg(char *mname)
 443 {
 444         FILE *mfp;
 445         char targ[256];
 446         char buf[256];
 447         char *dirs[2];
 448         int a;
 449
 450         if (CC->usersupp.axlevel < 6) {
 451                 cprintf("%d You must be an Aide to edit system messages.\n",
 452                         ERROR+HIGHER_ACCESS_REQUIRED);
 453                 return;
 454                 }
 455
 456         extract(buf,mname,0);
 457         for (a=0; a<strlen(buf); ++a) {         /* security measure */
 458                 if (buf[a] == '/') buf[a] = '.';
 459                 }
 460
 461         dirs[0]=mallok(64);
 462         dirs[1]=mallok(64);
 463         strcpy(dirs[0],"messages");
 464         strcpy(dirs[1],"help");
 465         mesg_locate(targ,buf,2,dirs);
 466         phree(dirs[0]);
 467         phree(dirs[1]);
 468
 469         if (strlen(targ)==0) {
 470                 snprintf(targ, sizeof targ, "./help/%s", buf);
 471                 }
 472
 473         mfp = fopen(targ,"w");
 474         if (mfp==NULL) {
 475                 cprintf("%d Cannot open '%s': %s\n",
 476                         ERROR,targ,strerror(errno));
 477                 return;
 478                 }
 479         cprintf("%d %s\n", SEND_LISTING, targ);
 480
 481         while (client_gets(buf), strcmp(buf, "000")) {
 482                 fprintf(mfp, "%s\n", buf);
 483                 }
 484
 485         fclose(mfp);
 486         }
 487
 488
 489 /*
 490  * who's online
 491  */
 492 void cmd_rwho(void) {
 493         struct CitContext *cptr;
 494         int spoofed = 0;
 495         int aide;
 496         char un[40], room[40], host[40], flags[5];
 497
 498         aide = CC->usersupp.axlevel >= 6;
 499         cprintf("%d\n",LISTING_FOLLOWS);
 500
 501         for (cptr = ContextList; cptr != NULL; cptr = cptr->next)
 502         {
 503                 flags[0] = '\0';
 504                 spoofed = 0;
 505
 506                 if (cptr->cs_flags & CS_POSTING)
 507                    strcat(flags, "*");
 508                 else
 509                    strcat(flags, ".");
 510
 511                 if (cptr->fake_username[0])
 512                 {
 513                    strcpy(un, cptr->fake_username);
 514                    spoofed = 1;
 515                 }
 516                 else
 517                    strcpy(un, cptr->curr_user);
 518
 519                 if (cptr->fake_hostname[0])
 520                 {
 521                    strcpy(host, cptr->fake_hostname);
 522                    spoofed = 1;
 523                 }
 524                 else
 525                    strcpy(host, cptr->cs_host);
 526
 527                 if (cptr->fake_roomname[0])
 528                 {
 529                    strcpy(room, cptr->fake_roomname);
 530                    spoofed = 1;
 531                 }
 532                 else
 533                    strcpy(room, cptr->cs_room);
 534
 535
 536                 if ((aide) && (spoofed))
 537                    strcat(flags, "+");
 538
 539                 if ((cptr->cs_flags & CS_STEALTH) && (aide))
 540                    strcat(flags, "-");
 541
 542                 if (((cptr->cs_flags&CS_STEALTH)==0) || (aide))
 543                 {
 544                         cprintf("%d|%s|%s|%s|%s|%ld|%s|%s\n",
 545                                 cptr->cs_pid, un, room,
 546                                 host, cptr->cs_clientname,
 547                                 (long)(cptr->lastidle),
 548                                 cptr->lastcmdname, flags);
 549                 }
 550                 if ((spoofed) && (aide))
 551                 {
 552                         cprintf("%d|%s|%s|%s|%s|%ld|%s|%s\n",
 553                                 cptr->cs_pid, cptr->curr_user, cptr->cs_room,
 554                                 cptr->cs_host, cptr->cs_clientname,
 555                                 (long)(cptr->lastidle),
 556                                 cptr->lastcmdname, flags);
 557
 558                 }
 559         }
 560         cprintf("000\n");
 561         }
 562
 563
 564 /*
 565  * Terminate another running session
 566  */
 567 void cmd_term(char *cmdbuf)
 568 {
 569         int session_num;
 570         struct CitContext *ccptr;
 571         int session_to_kill = 0;
 572
 573         if (!CC->logged_in) {
 574                 cprintf("%d Not logged in.\n",ERROR+NOT_LOGGED_IN);
 575                 return;
 576                 }
 577
 578         if (CC->usersupp.axlevel < 6) {
 579                 cprintf("%d You must be an Aide to terminate sessions.\n",
 580                         ERROR+HIGHER_ACCESS_REQUIRED);
 581                 return;
 582                 }
 583
 584         session_num = extract_int(cmdbuf, 0);
 585         if (session_num == CC->cs_pid) {
 586                 cprintf("%d You can't kill your own session.\n", ERROR);
 587                 return;
 588                 }
 589
 590         lprintf(9, "Locating session to kill\n");
 591         begin_critical_section(S_SESSION_TABLE);
 592         for (ccptr = ContextList; ccptr != NULL; ccptr = ccptr->next) {
 593                 if (session_num == ccptr->cs_pid) {
 594                         session_to_kill = ccptr->cs_pid;
 595                         }
 596                 }
 597         end_critical_section(S_SESSION_TABLE);
 598         lprintf(9, "session_to_kill == %d\n", session_to_kill);
 599
 600         if (session_to_kill > 0) {
 601                 lprintf(9, "calling kill_session()\n");
 602                 kill_session(session_to_kill);
 603                 cprintf("%d Session terminated.\n", OK);
 604                 }
 605         else {
 606                 cprintf("%d No such session.\n", ERROR);
 607                 }
 608         }
 609
 610
 611
 612
 613
 614 /*
 615  * get the paginator prompt
 616  */
 617 void cmd_more(void) {
 618         cprintf("%d %s\n",OK,config.c_moreprompt);
 619         }
 620
 621 /*
 622  * echo
 623  */
 624 void cmd_echo(char *etext)
 625 {
 626         cprintf("%d %s\n",OK,etext);
 627         }
 628
 629
 630
 631 /*
 632  * identify as internal program
 633  */
 634 void cmd_ipgm(char *argbuf)
 635 {
 636         int secret;
 637
 638         secret = extract_int(argbuf, 0);
 639         if (secret == config.c_ipgm_secret) {
 640                 CC->internal_pgm = 1;
 641                 strcpy(CC->curr_user, "<internal program>");
 642                 CC->cs_flags = CC->cs_flags|CS_STEALTH;
 643                 cprintf("%d Authenticated as an internal program.\n",OK);
 644                 }
 645         else {
 646                 cprintf("%d Authentication failed.\n",ERROR);
 647                 }
 648         }
 649
 650
 651 /*
 652  * Shut down the server
 653  */
 654 void cmd_down(void) {
 655         if (!CC->logged_in) {
 656                 cprintf("%d Not logged in.\n",ERROR+NOT_LOGGED_IN);
 657                 return;
 658                 }
 659
 660         if (CC->usersupp.axlevel < 6) {
 661                 cprintf("%d You must be an Aide to shut down the server.\n",
 662                         ERROR+HIGHER_ACCESS_REQUIRED);
 663                 return;
 664                 }
 665
 666         cprintf("%d Shutting down server.  Goodbye.\n", OK);
 667         master_cleanup();
 668         }
 669
 670 /*
 671  * Schedule or cancel a server shutdown
 672  */
 673 void cmd_scdn(char *argbuf)
 674 {
 675         int new_state;
 676
 677         if (!CC->logged_in) {
 678                 cprintf("%d Not logged in.\n",ERROR+NOT_LOGGED_IN);
 679                 return;
 680                 }
 681
 682         if (CC->usersupp.axlevel < 6) {
 683                 cprintf("%d You must be an Aide to schedule a shutdown.\n",
 684                         ERROR+HIGHER_ACCESS_REQUIRED);
 685                 return;
 686                 }
 687
 688         new_state = extract_int(argbuf, 0);
 689         if ((new_state == 0) || (new_state == 1)) {
 690                 ScheduledShutdown = new_state;
 691                 }
 692         cprintf("%d %d\n", OK, ScheduledShutdown);
 693         }
 694
 695
 696 /*
 697  * main context loop
 698  */
 699 void *context_loop(struct CitContext *con)
 700 {
 701         char cmdbuf[256];
 702         int num_sessions;
 703
 704         /*
 705          * Wedge our way into the context table.
 706          */
 707         InitMyContext(con);
 708
 709         /*
 710          * Initialize some variables specific to our context.
 711          */
 712         CC->logged_in = 0;
 713         CC->internal_pgm = 0;
 714         CC->download_fp = NULL;
 715         CC->upload_fp = NULL;
 716         CC->cs_pid = con->client_socket;        /* not necessarily portable */
 717         CC->FirstExpressMessage = NULL;
 718         CC->msglist = NULL;
 719         CC->num_msgs = 0;
 720         time(&CC->lastcmd);
 721         time(&CC->lastidle);
 722         strcpy(CC->lastcmdname, "    ");
 723         strcpy(CC->cs_clientname, "(unknown)");
 724         strcpy(CC->curr_user,"(not logged in)");
 725         strcpy(CC->net_node,"");
 726         snprintf(CC->temp, sizeof CC->temp, "/tmp/CitServer.%d.%d", getpid(), CC->cs_pid);
 727         strcpy(CC->cs_room, "(no room)");
 728         strncpy(CC->cs_host, config.c_fqdn, sizeof CC->cs_host);
 729         CC->cs_host[sizeof CC->cs_host - 1] = 0;
 730         locate_host(CC->cs_host);
 731         CC->cs_flags = 0;
 732         CC->upload_type = UPL_FILE;
 733         CC->dl_is_net = 0;
 734
 735         num_sessions = session_count();
 736         CC->nologin = 0;
 737         if ((config.c_maxsessions > 0)&&(num_sessions > config.c_maxsessions))
 738                 CC->nologin = 1;
 739
 740         if (CC->nologin==1) {
 741            cprintf("%d %s: Too many users are already online (maximum is %d)\n",
 742                 ERROR+MAX_SESSIONS_EXCEEDED,
 743                 config.c_nodename,config.c_maxsessions);
 744                 }
 745         else {
 746            cprintf("%d %s Citadel/UX server ready.\n",OK,config.c_nodename);
 747                 }
 748
 749         lprintf(3, "citserver[%3d]: started.\n", CC->cs_pid);
 750
 751         /* Run any session startup routines registered by loadable modules */
 752         PerformSessionHooks(EVT_START);
 753
 754         rec_log(CL_CONNECT, "");
 755
 756         do {
 757                 time(&CC->lastcmd);
 758                 memset(cmdbuf, 0, sizeof cmdbuf); /* Clear it, just in case */
 759                 if (client_gets(cmdbuf) < 1) cleanup(EXIT_NULL);
 760                 lprintf(5, "citserver[%3d]: %s\n", CC->cs_pid, cmdbuf);
 761
 762                 /*
 763                  * Let other clients see the last command we executed, but
 764                  * exclude NOOP because that would be boring.
 765                  */
 766                 if (strncasecmp(cmdbuf, "NOOP", 4)) {
 767                         strcpy(CC->lastcmdname, "    ");
 768                         strncpy(CC->lastcmdname, cmdbuf, 4);
 769                         time(&CC->lastidle);
 770                         }
 771
 772                 if ((strncasecmp(cmdbuf, "ENT0", 4)) && (strncasecmp(cmdbuf, "MESG", 4)) && (strncasecmp(cmdbuf, "MSGS", 4)))
 773                 {
 774                    CC->cs_flags &= ~CS_POSTING;
 775                 }
 776
 777 /*
 778  * This loop recognizes all server commands.
 779  */
 780
 781                 if (!strncasecmp(cmdbuf,"NOOP",4)) {
 782                         cprintf("%d%cok\n",OK,check_express());
 783                         }
 784
 785                 else if (!strncasecmp(cmdbuf,"QUIT",4)) {
 786                         cprintf("%d Goodbye.\n",OK);
 787                         }
 788
 789                 else if (!strncasecmp(cmdbuf,"LOUT",4)) {
 790                         if (CC->logged_in) logout(CC);
 791                         cprintf("%d logged out.\n",OK);
 792                         }
 793
 794                 else if (!strncasecmp(cmdbuf,"USER",4)) {
 795                         cmd_user(&cmdbuf[5]);
 796                         }
 797
 798                 else if (!strncasecmp(cmdbuf,"PASS",4)) {
 799                         cmd_pass(&cmdbuf[5]);
 800                         }
 801
 802                 else if (!strncasecmp(cmdbuf,"NEWU",4)) {
 803                         cmd_newu(&cmdbuf[5]);
 804                         }
 805
 806                 else if (!strncasecmp(cmdbuf,"SETP",4)) {
 807                         cmd_setp(&cmdbuf[5]);
 808                         }
 809
 810                 else if (!strncasecmp(cmdbuf,"LRMS",4)) {
 811                         cmd_lrms(&cmdbuf[5]);
 812                         }
 813
 814                 else if (!strncasecmp(cmdbuf,"LKRA",4)) {
 815                         cmd_lkra(&cmdbuf[5]);
 816                         }
 817
 818                 else if (!strncasecmp(cmdbuf,"LKRN",4)) {
 819                         cmd_lkrn(&cmdbuf[5]);
 820                         }
 821
 822                 else if (!strncasecmp(cmdbuf,"LKRO",4)) {
 823                         cmd_lkro(&cmdbuf[5]);
 824                         }
 825
 826                 else if (!strncasecmp(cmdbuf,"LZRM",4)) {
 827                         cmd_lzrm(&cmdbuf[5]);
 828                         }
 829
 830                 else if (!strncasecmp(cmdbuf,"GETU",4)) {
 831                         cmd_getu();
 832                         }
 833
 834                 else if (!strncasecmp(cmdbuf,"SETU",4)) {
 835                         cmd_setu(&cmdbuf[5]);
 836                         }
 837
 838                 else if (!strncasecmp(cmdbuf,"GOTO",4)) {
 839                         cmd_goto(&cmdbuf[5]);
 840                         }
 841
 842                 else if (!strncasecmp(cmdbuf,"MSGS",4)) {
 843                         cmd_msgs(&cmdbuf[5]);
 844                         }
 845
 846                 else if (!strncasecmp(cmdbuf,"WHOK",4)) {
 847                         cmd_whok();
 848                         }
 849
 850                 else if (!strncasecmp(cmdbuf,"RDIR",4)) {
 851                         cmd_rdir();
 852                         }
 853
 854                 else if (!strncasecmp(cmdbuf,"MSG0",4)) {
 855                         cmd_msg0(&cmdbuf[5]);
 856                         }
 857
 858                 else if (!strncasecmp(cmdbuf,"MSG2",4)) {
 859                         cmd_msg2(&cmdbuf[5]);
 860                         }
 861
 862                 else if (!strncasecmp(cmdbuf,"MSG3",4)) {
 863                         cmd_msg3(&cmdbuf[5]);
 864                         }
 865
 866                 else if (!strncasecmp(cmdbuf,"MSG4",4)) {
 867                         cmd_msg4(&cmdbuf[5]);
 868                         }
 869
 870                 else if (!strncasecmp(cmdbuf,"OPNA",4)) {
 871                         cmd_opna(&cmdbuf[5]);
 872                         }
 873
 874                 else if (!strncasecmp(cmdbuf,"INFO",4)) {
 875                         cmd_info();
 876                         }
 877
 878                 else if (!strncasecmp(cmdbuf,"SLRP",4)) {
 879                         cmd_slrp(&cmdbuf[5]);
 880                         }
 881
 882                 else if (!strncasecmp(cmdbuf,"INVT",4)) {
 883                         cmd_invt_kick(&cmdbuf[5],1);
 884                         }
 885
 886                 else if (!strncasecmp(cmdbuf,"KICK",4)) {
 887                         cmd_invt_kick(&cmdbuf[5],0);
 888                         }
 889
 890                 else if (!strncasecmp(cmdbuf,"GETR",4)) {
 891                         cmd_getr();
 892                         }
 893
 894                 else if (!strncasecmp(cmdbuf,"SETR",4)) {
 895                         cmd_setr(&cmdbuf[5]);
 896                         }
 897
 898                 else if (!strncasecmp(cmdbuf,"GETA",4)) {
 899                         cmd_geta();
 900                         }
 901
 902                 else if (!strncasecmp(cmdbuf,"SETA",4)) {
 903                         cmd_seta(&cmdbuf[5]);
 904                         }
 905
 906                 else if (!strncasecmp(cmdbuf,"ENT0",4)) {
 907                         cmd_ent0(&cmdbuf[5]);
 908                         }
 909
 910                 else if (!strncasecmp(cmdbuf,"ENT3",4)) {
 911                         cmd_ent3(&cmdbuf[5]);
 912                         }
 913
 914                 else if (!strncasecmp(cmdbuf,"RINF",4)) {
 915                         cmd_rinf();
 916                         }
 917
 918                 else if (!strncasecmp(cmdbuf,"DELE",4)) {
 919                         cmd_dele(&cmdbuf[5]);
 920                         }
 921
 922                 else if (!strncasecmp(cmdbuf,"KILL",4)) {
 923                         cmd_kill(&cmdbuf[5]);
 924                         }
 925
 926                 else if (!strncasecmp(cmdbuf,"CRE8",4)) {
 927                         cmd_cre8(&cmdbuf[5]);
 928                         }
 929
 930                 else if (!strncasecmp(cmdbuf,"MOVE",4)) {
 931                         cmd_move(&cmdbuf[5]);
 932                         }
 933
 934                 else if (!strncasecmp(cmdbuf,"FORG",4)) {
 935                         cmd_forg();
 936                         }
 937
 938                 else if (!strncasecmp(cmdbuf,"MESG",4)) {
 939                         cmd_mesg(&cmdbuf[5]);
 940                         }
 941
 942                 else if (!strncasecmp(cmdbuf,"EMSG",4)) {
 943                         cmd_emsg(&cmdbuf[5]);
 944                         }
 945
 946                 else if (!strncasecmp(cmdbuf,"GNUR",4)) {
 947                         cmd_gnur();
 948                         }
 949
 950                 else if (!strncasecmp(cmdbuf,"GREG",4)) {
 951                         cmd_greg(&cmdbuf[5]);
 952                         }
 953
 954                 else if (!strncasecmp(cmdbuf,"VALI",4)) {
 955                         cmd_vali(&cmdbuf[5]);
 956                         }
 957
 958                 else if (!strncasecmp(cmdbuf,"EINF",4)) {
 959                         cmd_einf(&cmdbuf[5]);
 960                         }
 961
 962                 else if (!strncasecmp(cmdbuf,"LIST",4)) {
 963                         cmd_list();
 964                         }
 965
 966                 else if (!strncasecmp(cmdbuf,"REGI",4)) {
 967                         cmd_regi();
 968                         }
 969
 970                 else if (!strncasecmp(cmdbuf,"CHEK",4)) {
 971                         cmd_chek();
 972                         }
 973
 974                 else if (!strncasecmp(cmdbuf,"DELF",4)) {
 975                         cmd_delf(&cmdbuf[5]);
 976                         }
 977
 978                 else if (!strncasecmp(cmdbuf,"MOVF",4)) {
 979                         cmd_movf(&cmdbuf[5]);
 980                         }
 981
 982                 else if (!strncasecmp(cmdbuf,"NETF",4)) {
 983                         cmd_netf(&cmdbuf[5]);
 984                         }
 985
 986                 else if (!strncasecmp(cmdbuf,"RWHO",4)) {
 987                         cmd_rwho();
 988                         }
 989
 990                 else if (!strncasecmp(cmdbuf,"OPEN",4)) {
 991                         cmd_open(&cmdbuf[5]);
 992                         }
 993
 994                 else if (!strncasecmp(cmdbuf,"CLOS",4)) {
 995                         cmd_clos();
 996                         }
 997
 998                 else if (!strncasecmp(cmdbuf,"UOPN",4)) {
 999                         cmd_uopn(&cmdbuf[5]);
1000                         }
1001
1002                 else if (!strncasecmp(cmdbuf,"UCLS",4)) {
1003                         cmd_ucls(&cmdbuf[5]);
1004                         }
1005
1006                 else if (!strncasecmp(cmdbuf,"READ",4)) {
1007                         cmd_read(&cmdbuf[5]);
1008                         }
1009
1010                 else if (!strncasecmp(cmdbuf,"WRIT",4)) {
1011                         cmd_writ(&cmdbuf[5]);
1012                         }
1013
1014                 else if (!strncasecmp(cmdbuf,"QUSR",4)) {
1015                         cmd_qusr(&cmdbuf[5]);
1016                         }
1017
1018                 else if (!strncasecmp(cmdbuf,"ECHO",4)) {
1019                         cmd_echo(&cmdbuf[5]);
1020                         }
1021
1022                 else if (!strncasecmp(cmdbuf,"OIMG",4)) {
1023                         cmd_oimg(&cmdbuf[5]);
1024                         }
1025
1026                 else if (!strncasecmp(cmdbuf,"MORE",4)) {
1027                         cmd_more();
1028                         }
1029
1030                 else if (!strncasecmp(cmdbuf,"NETP",4)) {
1031                         cmd_netp(&cmdbuf[5]);
1032                         }
1033
1034                 else if (!strncasecmp(cmdbuf,"NDOP",4)) {
1035                         cmd_ndop(&cmdbuf[5]);
1036                         }
1037
1038                 else if (!strncasecmp(cmdbuf,"NUOP",4)) {
1039                         cmd_nuop(&cmdbuf[5]);
1040                         }
1041
1042                 else if (!strncasecmp(cmdbuf,"LFLR",4)) {
1043                         cmd_lflr();
1044                         }
1045
1046                 else if (!strncasecmp(cmdbuf,"CFLR",4)) {
1047                         cmd_cflr(&cmdbuf[5]);
1048                         }
1049
1050                 else if (!strncasecmp(cmdbuf,"KFLR",4)) {
1051                         cmd_kflr(&cmdbuf[5]);
1052                         }
1053
1054                 else if (!strncasecmp(cmdbuf,"EFLR",4)) {
1055                         cmd_eflr(&cmdbuf[5]);
1056                         }
1057
1058                 else if (!strncasecmp(cmdbuf,"IDEN",4)) {
1059                         cmd_iden(&cmdbuf[5]);
1060                         }
1061
1062                 else if (!strncasecmp(cmdbuf,"IPGM",4)) {
1063                         cmd_ipgm(&cmdbuf[5]);
1064                         }
1065
1066                 else if (!strncasecmp(cmdbuf,"EBIO",4)) {
1067                         cmd_ebio();
1068                         }
1069
1070                 else if (!strncasecmp(cmdbuf,"RBIO",4)) {
1071                         cmd_rbio(&cmdbuf[5]);
1072                         }
1073
1074                 else if (!strncasecmp(cmdbuf,"LBIO",4)) {
1075                         cmd_lbio();
1076                         }
1077
1078                 else if (!strncasecmp(cmdbuf,"STEL",4)) {
1079                         cmd_stel(&cmdbuf[5]);
1080                         }
1081
1082                 else if (!strncasecmp(cmdbuf,"TERM",4)) {
1083                         cmd_term(&cmdbuf[5]);
1084                         }
1085
1086                 else if (!strncasecmp(cmdbuf,"DOWN",4)) {
1087                         cmd_down();
1088                         }
1089
1090                 else if (!strncasecmp(cmdbuf,"SCDN",4)) {
1091                         cmd_scdn(&cmdbuf[5]);
1092                         }
1093
1094                 else if (!strncasecmp(cmdbuf, "NSET", 4)) {
1095                         cmd_nset(&cmdbuf[5]);
1096                         }
1097
1098                 else if (!strncasecmp(cmdbuf, "UIMG", 4)) {
1099                         cmd_uimg(&cmdbuf[5]);
1100                         }
1101
1102                 else if (!strncasecmp(cmdbuf, "UCHG", 4)) {
1103                         cmd_uchg(&cmdbuf[5]);
1104                         }
1105
1106                 else if (!strncasecmp(cmdbuf, "TIME", 4)) {
1107                         cmd_time();
1108                         }
1109
1110                 else if (!strncasecmp(cmdbuf, "HCHG", 4)) {
1111                         cmd_hchg(&cmdbuf[5]);
1112                         }
1113
1114                 else if (!strncasecmp(cmdbuf, "RCHG", 4)) {
1115                         cmd_rchg(&cmdbuf[5]);
1116                         }
1117
1118                 else if (!strncasecmp(cmdbuf, "AGUP", 4)) {
1119                         cmd_agup(&cmdbuf[5]);
1120                         }
1121
1122                 else if (!strncasecmp(cmdbuf, "ASUP", 4)) {
1123                         cmd_asup(&cmdbuf[5]);
1124                         }
1125
1126                 else if (!strncasecmp(cmdbuf, "GPEX", 4)) {
1127                         cmd_gpex(&cmdbuf[5]);
1128                         }
1129
1130                 else if (!strncasecmp(cmdbuf, "SPEX", 4)) {
1131                         cmd_spex(&cmdbuf[5]);
1132                         }
1133
1134                 else if (!strncasecmp(cmdbuf, "CONF", 4)) {
1135                         cmd_conf(&cmdbuf[5]);
1136                         }
1137
1138 #ifdef DEBUG_MEMORY_LEAKS
1139                 else if (!strncasecmp(cmdbuf, "LEAK", 4)) {
1140                         dump_tracked();
1141                         }
1142 #endif
1143
1144                 else if (!DLoader_Exec_Cmd(cmdbuf))
1145                         {
1146                            cprintf("%d Unrecognized or unsupported command.\n",
1147                                     ERROR);
1148                         }
1149
1150                 } while(strncasecmp(cmdbuf, "QUIT", 4));
1151
1152         cleanup(EXIT_NORMAL);
1153         return(NULL);
1154         }