citadel/citserver.c

   1 /*
   2  * $Id$
   3  *
   4  * Main source module for the Citadel server
   5  *
   6  */
   7
   8 #include "sysdep.h"
   9 #include <stdlib.h>
  10 #include <unistd.h>
  11 #include <stdio.h>
  12 #include <fcntl.h>
  13 #include <signal.h>
  14 #include <sys/types.h>
  15 #include <sys/stat.h>
  16
  17
  18 #if TIME_WITH_SYS_TIME
  19 # include <sys/time.h>
  20 # include <time.h>
  21 #else
  22 # if HAVE_SYS_TIME_H
  23 #  include <sys/time.h>
  24 # else
  25 #  include <time.h>
  26 # endif
  27 #endif
  28
  29 #if HAVE_BACKTRACE
  30 #include <execinfo.h>
  31 #endif
  32
  33 #include <ctype.h>
  34 #include <string.h>
  35 #include <dirent.h>
  36 #include <errno.h>
  37 #include <limits.h>
  38 #include <netdb.h>
  39 #include <sys/types.h>
  40 #include <sys/socket.h>
  41 #include <netinet/in.h>
  42 #include <arpa/inet.h>
  43 #include <libcitadel.h>
  44 #include "citadel.h"
  45 #include "server.h"
  46 #include "sysdep_decls.h"
  47 #include "threads.h"
  48 #include "citserver.h"
  49 #include "config.h"
  50 #include "database.h"
  51 #include "housekeeping.h"
  52 #include "user_ops.h"
  53 #include "msgbase.h"
  54 #include "support.h"
  55 #include "locate_host.h"
  56 #include "room_ops.h"
  57 #include "file_ops.h"
  58 #include "policy.h"
  59 #include "control.h"
  60 #include "euidindex.h"
  61
  62 #ifndef HAVE_SNPRINTF
  63 #include "snprintf.h"
  64 #endif
  65
  66 #include "ctdl_module.h"
  67
  68
  69 struct CitContext *ContextList = NULL;
  70 struct CitContext* next_session = NULL;
  71 char *unique_session_numbers;
  72 int ScheduledShutdown = 0;
  73 time_t server_startup_time;
  74 int panic_fd;
  75
  76 /**
  77  * \brief print the actual stack frame.
  78  */
  79 void cit_backtrace(void)
  80 {
  81 #ifdef HAVE_BACKTRACE
  82         void *stack_frames[50];
  83         size_t size, i;
  84         char **strings;
  85
  86
  87         size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
  88         strings = backtrace_symbols(stack_frames, size);
  89         for (i = 0; i < size; i++) {
  90                 if (strings != NULL)
  91                         lprintf(1, "%s\n", strings[i]);
  92                 else
  93                         lprintf(1, "%p\n", stack_frames[i]);
  94         }
  95         free(strings);
  96 #endif
  97 }
  98
  99 /**
 100  * \brief print the actual stack frame.
 101  */
 102 void cit_panic_backtrace(int SigNum)
 103 {
 104 #ifdef HAVE_BACKTRACE
 105         void *stack_frames[10];
 106         size_t size, i;
 107         char **strings;
 108
 109         printf("caught signal 11\n");
 110         size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
 111         strings = backtrace_symbols(stack_frames, size);
 112         for (i = 0; i < size; i++) {
 113                 if (strings != NULL)
 114                         lprintf(1, "%s\n", strings[i]);
 115                 else
 116                         lprintf(1, "%p\n", stack_frames[i]);
 117         }
 118         free(strings);
 119 #endif
 120         exit(-1);
 121 }
 122
 123 /*
 124  * Various things that need to be initialized at startup
 125  */
 126 void master_startup(void) {
 127         struct timeval tv;
 128         unsigned int seed;
 129         FILE *urandom;
 130         struct ctdlroom qrbuf;
 131
 132         lprintf(CTDL_DEBUG, "master_startup() started\n");
 133         time(&server_startup_time);
 134
 135         lprintf(CTDL_INFO, "Opening databases\n");
 136         open_databases();
 137
 138         ctdl_thread_internal_init_tsd();
 139
 140         CtdlThreadAllocTSD();
 141
 142         check_ref_counts();
 143
 144         lprintf(CTDL_INFO, "Creating base rooms (if necessary)\n");
 145         create_room(config.c_baseroom,  0, "", 0, 1, 0, VIEW_BBS);
 146         create_room(AIDEROOM,           3, "", 0, 1, 0, VIEW_BBS);
 147         create_room(SYSCONFIGROOM,      3, "", 0, 1, 0, VIEW_BBS);
 148         create_room(config.c_twitroom,  0, "", 0, 1, 0, VIEW_BBS);
 149
 150         /* The "Local System Configuration" room doesn't need to be visible */
 151         if (lgetroom(&qrbuf, SYSCONFIGROOM) == 0) {
 152                 qrbuf.QRflags2 |= QR2_SYSTEM;
 153                 lputroom(&qrbuf);
 154         }
 155
 156         /* Aide needs to be public postable, else we're not RFC conformant. */
 157         if (lgetroom(&qrbuf, AIDEROOM) == 0) {
 158                 qrbuf.QRflags2 |= QR2_SMTP_PUBLIC;
 159                 lputroom(&qrbuf);
 160         }
 161
 162         lprintf(CTDL_INFO, "Seeding the pseudo-random number generator...\n");
 163         urandom = fopen("/dev/urandom", "r");
 164         if (urandom != NULL) {
 165                 fread(&seed, sizeof seed, 1, urandom);
 166                 fclose(urandom);
 167         }
 168         else {
 169                 gettimeofday(&tv, NULL);
 170                 seed = tv.tv_usec;
 171         }
 172         srandom(seed);
 173
 174         lprintf(CTDL_INFO, "Initializing ipgm secret\n");
 175         get_config();
 176         config.c_ipgm_secret = rand();
 177         put_config();
 178
 179         lprintf(CTDL_DEBUG, "master_startup() finished\n");
 180 }
 181
 182
 183 /*
 184  * Cleanup routine to be called when the server is shutting down.
 185  */
 186 void master_cleanup(int exitcode) {
 187         struct CleanupFunctionHook *fcn;
 188         static int already_cleaning_up = 0;
 189
 190         if (already_cleaning_up) while(1) sleep(1);
 191         already_cleaning_up = 1;
 192
 193         /* Run any cleanup routines registered by loadable modules */
 194         for (fcn = CleanupHookTable; fcn != NULL; fcn = fcn->next) {
 195                 (*fcn->h_function_pointer)();
 196         }
 197
 198         /* Close the AdjRefCount queue file */
 199         AdjRefCount(-1, 0);
 200
 201         /* Do system-dependent stuff */
 202         sysdep_master_cleanup();
 203
 204         /* Close databases */
 205         lprintf(CTDL_INFO, "Closing databases\n");
 206         close_databases();
 207
 208 #ifdef DEBUG_MEMORY_LEAKS
 209         dump_heap();
 210 #endif
 211
 212         /* If the operator requested a halt but not an exit, halt here. */
 213         if (shutdown_and_halt) {
 214                 lprintf(CTDL_NOTICE, "citserver: Halting server without exiting.\n");
 215                 fflush(stdout); fflush(stderr);
 216                 while(1) {
 217                         sleep(32767);
 218                 }
 219         }
 220
 221         release_control();
 222
 223         /* Now go away. */
 224         lprintf(CTDL_NOTICE, "citserver: Exiting with status %d\n", exitcode);
 225         fflush(stdout); fflush(stderr);
 226
 227         if (restart_server != 0)
 228                 exit(1);
 229         exit(exitcode);
 230 }
 231
 232
 233
 234 /*
 235  * Terminate a session.
 236  */
 237 void RemoveContext (struct CitContext *con)
 238 {
 239         if (con==NULL) {
 240                 lprintf(CTDL_ERR,
 241                         "WARNING: RemoveContext() called with NULL!\n");
 242                 return;
 243         }
 244         lprintf(CTDL_DEBUG, "RemoveContext() session %d\n", con->cs_pid);
 245
 246         /* Run any cleanup routines registered by loadable modules.
 247          * Note: We have to "become_session()" because the cleanup functions
 248          *       might make references to "CC" assuming it's the right one.
 249          */
 250         become_session(con);
 251         logout();
 252         PerformSessionHooks(EVT_STOP);
 253         become_session(NULL);
 254
 255         lprintf(CTDL_NOTICE, "[%3d] Session ended.\n", con->cs_pid);
 256
 257         /* If the client is still connected, blow 'em away. */
 258         lprintf(CTDL_DEBUG, "Closing socket %d\n", con->client_socket);
 259         close(con->client_socket);
 260
 261         lprintf(CTDL_DEBUG, "Done with RemoveContext()\n");
 262 }
 263
 264
 265
 266
 267
 268 /*
 269  * cmd_info()  -  tell the client about this server
 270  */
 271 void cmd_info(void) {
 272         cprintf("%d Server info:\n", LISTING_FOLLOWS);
 273         cprintf("%d\n", CC->cs_pid);
 274         cprintf("%s\n", config.c_nodename);
 275         cprintf("%s\n", config.c_humannode);
 276         cprintf("%s\n", config.c_fqdn);
 277         cprintf("%s\n", CITADEL);
 278         cprintf("%d\n", REV_LEVEL);
 279         cprintf("%s\n", config.c_site_location);
 280         cprintf("%s\n", config.c_sysadm);
 281         cprintf("%d\n", SERVER_TYPE);
 282         cprintf("%s\n", config.c_moreprompt);
 283         cprintf("1\n"); /* 1 = yes, this system supports floors */
 284         cprintf("1\n"); /* 1 = we support the extended paging options */
 285         cprintf("%s\n", CC->cs_nonce);
 286         cprintf("1\n"); /* 1 = yes, this system supports the QNOP command */
 287
 288 #ifdef HAVE_LDAP
 289         cprintf("1\n"); /* 1 = yes, this server is LDAP-enabled */
 290 #else
 291         cprintf("0\n"); /* 1 = no, this server is not LDAP-enabled */
 292 #endif
 293
 294         if (config.c_auth_mode == AUTHMODE_NATIVE) {
 295                 cprintf("%d\n", config.c_disable_newu);
 296         }
 297         else {
 298                 cprintf("1\n"); /* "create new user" does not work with non-native auth modes */
 299         }
 300
 301         cprintf("%s\n", config.c_default_cal_zone);
 302
 303         /* Output load averages */
 304         cprintf("%f\n", CtdlThreadLoadAvg);
 305         cprintf("%f\n", CtdlThreadWorkerAvg);
 306         cprintf("%d\n", CtdlThreadGetCount());
 307
 308         cprintf("1\n");         /* yes, Sieve mail filtering is supported */
 309         cprintf("%d\n", config.c_enable_fulltext);
 310
 311         cprintf("000\n");
 312 }
 313
 314
 315 /*
 316  * returns an asterisk if there are any instant messages waiting,
 317  * space otherwise.
 318  */
 319 char CtdlCheckExpress(void) {
 320         if (CC->FirstExpressMessage == NULL) {
 321                 return(' ');
 322         }
 323         else {
 324                 return('*');
 325         }
 326 }
 327
 328 void cmd_time(void)
 329 {
 330    time_t tv;
 331    struct tm tmp;
 332
 333    tv = time(NULL);
 334    localtime_r(&tv, &tmp);
 335
 336    /* timezone and daylight global variables are not portable. */
 337 #ifdef HAVE_STRUCT_TM_TM_GMTOFF
 338    cprintf("%d %ld|%ld|%d\n", CIT_OK, (long)tv, tmp.tm_gmtoff, tmp.tm_isdst);
 339 #else
 340    cprintf("%d %ld|%ld|%d\n", CIT_OK, (long)tv, timezone, tmp.tm_isdst);
 341 #endif
 342 }
 343
 344
 345 /*
 346  * Check originating host against the public_clients file.  This determines
 347  * whether the client is allowed to change the hostname for this session
 348  * (for example, to show the location of the user rather than the location
 349  * of the client).
 350  */
 351 int is_public_client(void)
 352 {
 353         char buf[1024];
 354         char addrbuf[1024];
 355         FILE *fp;
 356         int i;
 357         char *public_clientspos;
 358         char *public_clientsend;
 359         char *paddr = NULL;
 360         struct stat statbuf;
 361         static time_t pc_timestamp = 0;
 362         static char public_clients[SIZ];
 363         static char public_clients_file[SIZ];
 364
 365 #define LOCALHOSTSTR "127.0.0.1"
 366
 367         snprintf(public_clients_file,
 368                          sizeof public_clients_file,
 369                          "%s/public_clients",
 370                          ctdl_etc_dir);
 371
 372         /*
 373          * Check the time stamp on the public_clients file.  If it's been
 374          * updated since the last time we were here (or if this is the first
 375          * time we've been through the loop), read its contents and learn
 376          * the IP addresses of the listed hosts.
 377          */
 378         if (stat(public_clients_file, &statbuf) != 0) {
 379                 /* No public_clients file exists, so bail out */
 380                 lprintf(CTDL_WARNING, "Warning: '%s' does not exist\n",
 381                                 public_clients_file);
 382                 return(0);
 383         }
 384
 385         if (statbuf.st_mtime > pc_timestamp) {
 386                 begin_critical_section(S_PUBLIC_CLIENTS);
 387                 lprintf(CTDL_INFO, "Loading %s\n", public_clients_file);
 388
 389                 public_clientspos = &public_clients[0];
 390                 public_clientsend = public_clientspos + SIZ;
 391                 safestrncpy(public_clientspos, LOCALHOSTSTR, sizeof public_clients);
 392                 public_clientspos += sizeof(LOCALHOSTSTR) - 1;
 393
 394                 if (hostname_to_dotted_quad(addrbuf, config.c_fqdn) == 0) {
 395                         *(public_clientspos++) = '|';
 396                         paddr = &addrbuf[0];
 397                         while (!IsEmptyStr (paddr) &&
 398                                (public_clientspos < public_clientsend))
 399                                 *(public_clientspos++) = *(paddr++);
 400                 }
 401
 402                 fp = fopen(public_clients_file, "r");
 403                 if (fp != NULL)
 404                         while ((fgets(buf, sizeof buf, fp)!=NULL) &&
 405                                (public_clientspos < public_clientsend)){
 406                                 char *ptr;
 407                                 ptr = buf;
 408                                 while (!IsEmptyStr(ptr)) {
 409                                         if (*ptr == '#') {
 410                                                 *ptr = 0;
 411                                                 break;
 412                                         }
 413                                 else ptr++;
 414                                 }
 415                                 ptr--;
 416                                 while (ptr>buf && isspace(*ptr)) {
 417                                         *(ptr--) = 0;
 418                                 }
 419                                 if (hostname_to_dotted_quad(addrbuf, buf) == 0) {
 420                                         *(public_clientspos++) = '|';
 421                                         paddr = addrbuf;
 422                                         while (!IsEmptyStr(paddr) &&
 423                                                (public_clientspos < public_clientsend)){
 424                                                 *(public_clientspos++) = *(paddr++);
 425                                         }
 426                                 }
 427                         }
 428                 fclose(fp);
 429                 pc_timestamp = time(NULL);
 430                 end_critical_section(S_PUBLIC_CLIENTS);
 431         }
 432
 433         lprintf(CTDL_DEBUG, "Checking whether %s is a local or public client\n",
 434                 CC->cs_addr);
 435         for (i=0; i<num_parms(public_clients); ++i) {
 436                 extract_token(addrbuf, public_clients, i, '|', sizeof addrbuf);
 437                 if (!strcasecmp(CC->cs_addr, addrbuf)) {
 438                         lprintf(CTDL_DEBUG, "... yes it is.\n");
 439                         return(1);
 440                 }
 441         }
 442
 443         /* No hits.  This is not a public client. */
 444         lprintf(CTDL_DEBUG, "... no it isn't.\n");
 445         return(0);
 446 }
 447
 448
 449 /*
 450  * the client is identifying itself to the server
 451  */
 452 void cmd_iden(char *argbuf)
 453 {
 454         int dev_code;
 455         int cli_code;
 456         int rev_level;
 457         char desc[128];
 458         char from_host[128];
 459         struct in_addr addr;
 460         int do_lookup = 0;
 461
 462         if (num_parms(argbuf)<4) {
 463                 cprintf("%d usage error\n", ERROR + ILLEGAL_VALUE);
 464                 return;
 465         }
 466
 467         dev_code = extract_int(argbuf,0);
 468         cli_code = extract_int(argbuf,1);
 469         rev_level = extract_int(argbuf,2);
 470         extract_token(desc, argbuf, 3, '|', sizeof desc);
 471
 472         safestrncpy(from_host, config.c_fqdn, sizeof from_host);
 473         from_host[sizeof from_host - 1] = 0;
 474         if (num_parms(argbuf)>=5) extract_token(from_host, argbuf, 4, '|', sizeof from_host);
 475
 476         CC->cs_clientdev = dev_code;
 477         CC->cs_clienttyp = cli_code;
 478         CC->cs_clientver = rev_level;
 479         safestrncpy(CC->cs_clientname, desc, sizeof CC->cs_clientname);
 480         CC->cs_clientname[31] = 0;
 481
 482         if (!IsEmptyStr(from_host)) {
 483                 if (CC->is_local_socket) do_lookup = 1;
 484                 else if (is_public_client()) do_lookup = 1;
 485         }
 486
 487         if (do_lookup) {
 488                 lprintf(CTDL_DEBUG, "Looking up hostname '%s'\n", from_host);
 489                 if ((addr.s_addr = inet_addr(from_host)) != -1) {
 490                         locate_host(CC->cs_host, sizeof CC->cs_host,
 491                                 CC->cs_addr, sizeof CC->cs_addr,
 492                                 &addr);
 493                 }
 494                 else {
 495                         safestrncpy(CC->cs_host, from_host, sizeof CC->cs_host);
 496                         CC->cs_host[sizeof CC->cs_host - 1] = 0;
 497                 }
 498         }
 499
 500         lprintf(CTDL_NOTICE, "Client %d/%d/%01d.%02d (%s) from %s\n",
 501                 dev_code,
 502                 cli_code,
 503                 (rev_level / 100),
 504                 (rev_level % 100),
 505                 desc,
 506                 CC->cs_host);
 507         cprintf("%d Ok\n",CIT_OK);
 508 }
 509
 510
 511 /*
 512  * display system messages or help
 513  */
 514 void cmd_mesg(char *mname)
 515 {
 516         FILE *mfp;
 517         char targ[256];
 518         char buf[256];
 519         char buf2[256];
 520         char *dirs[2];
 521         DIR *dp;
 522         struct dirent *d;
 523
 524         extract_token(buf, mname, 0, '|', sizeof buf);
 525
 526         dirs[0] = strdup(ctdl_message_dir);
 527         dirs[1] = strdup(ctdl_hlp_dir);
 528
 529         snprintf(buf2, sizeof buf2, "%s.%d.%d",
 530                 buf, CC->cs_clientdev, CC->cs_clienttyp);
 531
 532         /* If the client requested "?" then produce a listing */
 533         if (!strcmp(buf, "?")) {
 534                 cprintf("%d %s\n", LISTING_FOLLOWS, buf);
 535                 dp = opendir(dirs[1]);
 536                 if (dp != NULL) {
 537                         while (d = readdir(dp), d != NULL) {
 538                                 if (d->d_name[0] != '.') {
 539                                         cprintf(" %s\n", d->d_name);
 540                                 }
 541                         }
 542                         closedir(dp);
 543                 }
 544                 cprintf("000\n");
 545                 free(dirs[0]);
 546                 free(dirs[1]);
 547                 return;
 548         }
 549
 550         /* Otherwise, look for the requested file by name. */
 551         else {
 552                 mesg_locate(targ, sizeof targ, buf2, 2, (const char **)dirs);
 553                 if (IsEmptyStr(targ)) {
 554                         snprintf(buf2, sizeof buf2, "%s.%d",
 555                                                         buf, CC->cs_clientdev);
 556                         mesg_locate(targ, sizeof targ, buf2, 2,
 557                                                         (const char **)dirs);
 558                         if (IsEmptyStr(targ)) {
 559                                 mesg_locate(targ, sizeof targ, buf, 2,
 560                                                         (const char **)dirs);
 561                         }
 562                 }
 563         }
 564
 565         free(dirs[0]);
 566         free(dirs[1]);
 567
 568         if (IsEmptyStr(targ)) {
 569                 cprintf("%d '%s' not found.  (Searching in %s and %s)\n",
 570                         ERROR + FILE_NOT_FOUND,
 571                         mname,
 572                         ctdl_message_dir,
 573                         ctdl_hlp_dir
 574                 );
 575                 return;
 576         }
 577
 578         mfp = fopen(targ, "r");
 579         if (mfp==NULL) {
 580                 cprintf("%d Cannot open '%s': %s\n",
 581                         ERROR + INTERNAL_ERROR, targ, strerror(errno));
 582                 return;
 583         }
 584         cprintf("%d %s\n", LISTING_FOLLOWS,buf);
 585
 586         while (fgets(buf, (sizeof buf - 1), mfp) != NULL) {
 587                 buf[strlen(buf)-1] = 0;
 588                 do_help_subst(buf);
 589                 cprintf("%s\n",buf);
 590         }
 591
 592         fclose(mfp);
 593         cprintf("000\n");
 594 }
 595
 596
 597 /*
 598  * enter system messages or help
 599  */
 600 void cmd_emsg(char *mname)
 601 {
 602         FILE *mfp;
 603         char targ[256];
 604         char buf[256];
 605         char *dirs[2];
 606         int a;
 607
 608         unbuffer_output();
 609
 610         if (CtdlAccessCheck(ac_aide)) return;
 611
 612         extract_token(buf, mname, 0, '|', sizeof buf);
 613         for (a=0; !IsEmptyStr(&buf[a]); ++a) {          /* security measure */
 614                 if (buf[a] == '/') buf[a] = '.';
 615         }
 616
 617         dirs[0] = strdup(ctdl_message_dir);
 618         dirs[1] = strdup(ctdl_hlp_dir);
 619
 620         mesg_locate(targ, sizeof targ, buf, 2, (const char**)dirs);
 621         free(dirs[0]);
 622         free(dirs[1]);
 623
 624         if (IsEmptyStr(targ)) {
 625                 snprintf(targ, sizeof targ,
 626                                  "%s/%s",
 627                                  ctdl_hlp_dir, buf);
 628         }
 629
 630         mfp = fopen(targ,"w");
 631         if (mfp==NULL) {
 632                 cprintf("%d Cannot open '%s': %s\n",
 633                         ERROR + INTERNAL_ERROR, targ, strerror(errno));
 634                 return;
 635         }
 636         cprintf("%d %s\n", SEND_LISTING, targ);
 637
 638         while (client_getln(buf, sizeof buf), strcmp(buf, "000")) {
 639                 fprintf(mfp, "%s\n", buf);
 640         }
 641
 642         fclose(mfp);
 643 }
 644
 645
 646 /* Don't show the names of private rooms unless the viewing
 647  * user also knows the rooms.
 648  */
 649 void GenerateRoomDisplay(char *real_room,
 650                         struct CitContext *viewed,
 651                         struct CitContext *viewer) {
 652
 653         int ra;
 654
 655         strcpy(real_room, viewed->room.QRname);
 656         if (viewed->room.QRflags & QR_MAILBOX) {
 657                 strcpy(real_room, &real_room[11]);
 658         }
 659         if (viewed->room.QRflags & QR_PRIVATE) {
 660                 CtdlRoomAccess(&viewed->room, &viewer->user, &ra, NULL);
 661                 if ( (ra & UA_KNOWN) == 0) {
 662                         strcpy(real_room, "<private room>");
 663                 }
 664         }
 665
 666         if (viewed->cs_flags & CS_CHAT) {
 667                 while (strlen(real_room) < 14) {
 668                         strcat(real_room, " ");
 669                 }
 670                 strcpy(&real_room[14], "<chat>");
 671         }
 672
 673 }
 674
 675 /*
 676  * Convenience function.
 677  */
 678 int CtdlAccessCheck(int required_level) {
 679
 680         if (CC->internal_pgm) return(0);
 681         if (required_level >= ac_internal) {
 682                 cprintf("%d This is not a user-level command.\n",
 683                         ERROR + HIGHER_ACCESS_REQUIRED);
 684                 return(-1);
 685         }
 686
 687         if ((required_level >= ac_logged_in) && (CC->logged_in == 0)) {
 688                 cprintf("%d Not logged in.\n", ERROR + NOT_LOGGED_IN);
 689                 return(-1);
 690         }
 691
 692         if (CC->user.axlevel >= 6) return(0);
 693         if (required_level >= ac_aide) {
 694                 cprintf("%d This command requires Aide access.\n",
 695                         ERROR + HIGHER_ACCESS_REQUIRED);
 696                 return(-1);
 697         }
 698
 699         if (is_room_aide()) return(0);
 700         if (required_level >= ac_room_aide) {
 701                 cprintf("%d This command requires Aide or Room Aide access.\n",
 702                         ERROR + HIGHER_ACCESS_REQUIRED);
 703                 return(-1);
 704         }
 705
 706         /* shhh ... succeed quietly */
 707         return(0);
 708 }
 709
 710
 711
 712 /*
 713  * Terminate another running session
 714  */
 715 void cmd_term(char *cmdbuf)
 716 {
 717         int session_num;
 718         struct CitContext *ccptr;
 719         int found_it = 0;
 720         int allowed = 0;
 721
 722         session_num = extract_int(cmdbuf, 0);
 723         if (session_num == CC->cs_pid) {
 724                 cprintf("%d You can't kill your own session.\n", ERROR + ILLEGAL_VALUE);
 725                 return;
 726         }
 727
 728         lprintf(CTDL_DEBUG, "Locating session to kill\n");
 729         begin_critical_section(S_SESSION_TABLE);
 730         for (ccptr = ContextList; ccptr != NULL; ccptr = ccptr->next) {
 731                 if (session_num == ccptr->cs_pid) {
 732                         found_it = 1;
 733                         if ((ccptr->user.usernum == CC->user.usernum)
 734                            || (CC->user.axlevel >= 6)) {
 735                                 allowed = 1;
 736                                 ccptr->kill_me = 1;
 737                         }
 738                         else {
 739                                 allowed = 0;
 740                         }
 741                 }
 742         }
 743         end_critical_section(S_SESSION_TABLE);
 744
 745         if (found_it) {
 746                 if (allowed) {
 747                         cprintf("%d Session terminated.\n", CIT_OK);
 748                 }
 749                 else {
 750                         cprintf("%d You are not allowed to do that.\n",
 751                                 ERROR + HIGHER_ACCESS_REQUIRED);
 752                 }
 753         }
 754         else {
 755                 cprintf("%d No such session.\n", ERROR + ILLEGAL_VALUE);
 756         }
 757 }
 758
 759
 760
 761
 762
 763 /*
 764  * get the paginator prompt
 765  */
 766 void cmd_more(void) {
 767         cprintf("%d %s\n", CIT_OK, config.c_moreprompt);
 768 }
 769
 770 /*
 771  * echo
 772  */
 773 void cmd_echo(char *etext)
 774 {
 775         cprintf("%d %s\n", CIT_OK, etext);
 776 }
 777
 778
 779
 780 /*
 781  * identify as internal program
 782  */
 783 void cmd_ipgm(char *argbuf)
 784 {
 785         int secret;
 786
 787         secret = extract_int(argbuf, 0);
 788
 789         /* For security reasons, we do NOT allow this command to run
 790          * over the network.  Local sockets only.
 791          */
 792         if (!CC->is_local_socket) {
 793                 sleep(5);
 794                 cprintf("%d Authentication failed.\n",
 795                         ERROR + PASSWORD_REQUIRED);
 796         }
 797         else if (secret == config.c_ipgm_secret) {
 798                 CC->internal_pgm = 1;
 799                 strcpy(CC->curr_user, "<internal program>");
 800                 CC->cs_flags = CC->cs_flags|CS_STEALTH;
 801                 cprintf("%d Authenticated as an internal program.\n", CIT_OK);
 802         }
 803         else {
 804                 sleep(5);
 805                 cprintf("%d Authentication failed.\n",
 806                         ERROR + PASSWORD_REQUIRED);
 807                 lprintf(CTDL_ERR, "Warning: ipgm authentication failed.\n");
 808                 CC->kill_me = 1;
 809         }
 810
 811         /* Now change the ipgm secret for the next round.
 812          * (Disabled because it breaks concurrent scripts.  The fact that
 813          * we no longer accept IPGM over the network should be sufficient
 814          * to prevent brute-force attacks.  If you don't agree, uncomment
 815          * this block.)
 816         get_config();
 817         config.c_ipgm_secret = rand();
 818         put_config();
 819         */
 820 }
 821
 822
 823 /*
 824  * Shut down the server
 825  */
 826 void cmd_down(char *argbuf) {
 827         char *Reply ="%d Shutting down server.  Goodbye.\n";
 828
 829         if (CtdlAccessCheck(ac_aide)) return;
 830
 831         if (!IsEmptyStr(argbuf))
 832         {
 833                 int state = CIT_OK;
 834                 restart_server = extract_int(argbuf, 0);
 835
 836                 if (restart_server > 0)
 837                         Reply = "%d Restarting server.  See you soon.\n";
 838                 if ((restart_server > 0) && !running_as_daemon)
 839                 {
 840                         lprintf(CTDL_ERR, "The user requested restart, but not running as deamon! Geronimooooooo!\n");
 841                         Reply = "%d Warning, not running in deamon mode. maybe we will come up again, but don't lean on it.\n";
 842                         state = ERROR;
 843                 }
 844                 cprintf(Reply, state);
 845         }
 846         else
 847         {
 848                 cprintf(Reply, CIT_OK + SERVER_SHUTTING_DOWN);
 849         }
 850         CtdlThreadStopAll();
 851 }
 852
 853 /*
 854  * Halt the server without exiting the server process.
 855  */
 856 void cmd_halt(void) {
 857
 858         if (CtdlAccessCheck(ac_aide)) return;
 859
 860         cprintf("%d Halting server.  Goodbye.\n", CIT_OK);
 861         CtdlThreadStopAll();
 862         shutdown_and_halt = 1;
 863 }
 864
 865 /*
 866  * Schedule or cancel a server shutdown
 867  */
 868 void cmd_scdn(char *argbuf)
 869 {
 870         int new_state;
 871         int state = CIT_OK;
 872         char *Reply = "%d %d\n";
 873
 874         if (CtdlAccessCheck(ac_aide)) return;
 875
 876         new_state = extract_int(argbuf, 0);
 877         if ((new_state == 2) || (new_state == 3))
 878         {
 879                 restart_server = 1;
 880                 if (!running_as_daemon)
 881                 {
 882                         lprintf(CTDL_ERR, "The user requested restart, but not running as deamon! Geronimooooooo!\n");
 883                         Reply = "%d %d Warning, not running in deamon mode. maybe we will come up again, but don't lean on it.\n";
 884                         state = ERROR;
 885                 }
 886
 887                 restart_server = extract_int(argbuf, 0);
 888                 new_state -= 2;
 889         }
 890         if ((new_state == 0) || (new_state == 1)) {
 891                 ScheduledShutdown = new_state;
 892         }
 893         cprintf(Reply, state, ScheduledShutdown);
 894 }
 895
 896
 897 /*
 898  * Set or unset asynchronous protocol mode
 899  */
 900 void cmd_asyn(char *argbuf)
 901 {
 902         int new_state;
 903
 904         new_state = extract_int(argbuf, 0);
 905         if ((new_state == 0) || (new_state == 1)) {
 906                 CC->is_async = new_state;
 907         }
 908         cprintf("%d %d\n", CIT_OK, CC->is_async);
 909 }
 910
 911
 912 /*
 913  * Generate a "nonce" for APOP-style authentication.
 914  *
 915  * RFC 1725 et al specify a PID to be placed in front of the nonce.
 916  * Quoth BTX: That would be stupid.
 917  */
 918 void generate_nonce(struct CitContext *con) {
 919         struct timeval tv;
 920
 921         memset(con->cs_nonce, NONCE_SIZE, 0);
 922         gettimeofday(&tv, NULL);
 923         memset(con->cs_nonce, NONCE_SIZE, 0);
 924         snprintf(con->cs_nonce, NONCE_SIZE, "<%d%ld@%s>",
 925                 rand(), (long)tv.tv_usec, config.c_fqdn);
 926 }
 927
 928
 929
 930
 931 /*
 932  * Back-end function for starting a session
 933  */
 934 void begin_session(struct CitContext *con)
 935 {
 936         socklen_t len;
 937         struct sockaddr_in sin;
 938
 939         /*
 940          * Initialize some variables specific to our context.
 941          */
 942         con->logged_in = 0;
 943         con->internal_pgm = 0;
 944         con->download_fp = NULL;
 945         con->upload_fp = NULL;
 946         con->FirstExpressMessage = NULL;
 947         time(&con->lastcmd);
 948         time(&con->lastidle);
 949         strcpy(con->lastcmdname, "    ");
 950         strcpy(con->cs_clientname, "(unknown)");
 951         strcpy(con->curr_user, NLI);
 952         *con->net_node = '\0';
 953         *con->fake_username = '\0';
 954         *con->fake_hostname = '\0';
 955         *con->fake_roomname = '\0';
 956         generate_nonce(con);
 957         safestrncpy(con->cs_host, config.c_fqdn, sizeof con->cs_host);
 958         safestrncpy(con->cs_addr, "", sizeof con->cs_addr);
 959         con->cs_host[sizeof con->cs_host - 1] = 0;
 960         len = sizeof sin;
 961         if (!CC->is_local_socket) {
 962                 if (!getpeername(con->client_socket, (struct sockaddr *) &sin, &len)) {
 963                         locate_host(con->cs_host, sizeof con->cs_host,
 964                                 con->cs_addr, sizeof con->cs_addr,
 965                                 &sin.sin_addr
 966                         );
 967                 }
 968         }
 969         else {
 970                 strcpy(con->cs_host, "");
 971         }
 972         con->cs_flags = 0;
 973         con->upload_type = UPL_FILE;
 974         con->dl_is_net = 0;
 975
 976         con->nologin = 0;
 977         if ((config.c_maxsessions > 0)&&(num_sessions > config.c_maxsessions)) {
 978                 con->nologin = 1;
 979         }
 980
 981         if (!CC->is_local_socket) {
 982                 lprintf(CTDL_NOTICE, "Session started from %s [%s].\n", con->cs_host, con->cs_addr);
 983         }
 984         else {
 985                 lprintf(CTDL_NOTICE, "Session started via local socket.\n");
 986         }
 987
 988         /* Run any session startup routines registered by loadable modules */
 989         PerformSessionHooks(EVT_START);
 990 }
 991
 992
 993 void citproto_begin_session() {
 994         if (CC->nologin==1) {
 995                 cprintf("%d %s: Too many users are already online (maximum is %d)\n",
 996                         ERROR + MAX_SESSIONS_EXCEEDED,
 997                         config.c_nodename, config.c_maxsessions
 998                 );
 999                 CC->kill_me = 1;
1000         }
1001         else {
1002                 cprintf("%d %s Citadel server ready.\n",
1003                         CIT_OK, config.c_nodename);
1004         }
1005 }
1006
1007
1008
1009
1010 /*
1011  * This loop recognizes all server commands.
1012  */
1013 void do_command_loop(void) {
1014         char cmdbuf[SIZ];
1015         const char *old_name = NULL;
1016
1017         old_name = CtdlThreadName("do_command_loop");
1018
1019         time(&CC->lastcmd);
1020         memset(cmdbuf, 0, sizeof cmdbuf); /* Clear it, just in case */
1021         if (client_getln(cmdbuf, sizeof cmdbuf) < 1) {
1022                 lprintf(CTDL_ERR, "Client disconnected: ending session.\n");
1023                 CC->kill_me = 1;
1024                 CtdlThreadName(old_name);
1025                 return;
1026         }
1027
1028         /* Log the server command, but don't show passwords... */
1029         if ( (strncasecmp(cmdbuf, "PASS", 4))
1030            && (strncasecmp(cmdbuf, "SETP", 4)) ) {
1031                 lprintf(CTDL_INFO, "%s\n", cmdbuf);
1032         }
1033         else {
1034                 lprintf(CTDL_INFO, "<password command sent>\n");
1035         }
1036
1037         buffer_output();
1038
1039         /*
1040          * Let other clients see the last command we executed, and
1041          * update the idle time, but not NOOP, QNOP, PEXP, GEXP, RWHO, or TIME.
1042          */
1043         if ( (strncasecmp(cmdbuf, "NOOP", 4))
1044            && (strncasecmp(cmdbuf, "QNOP", 4))
1045            && (strncasecmp(cmdbuf, "PEXP", 4))
1046            && (strncasecmp(cmdbuf, "GEXP", 4))
1047            && (strncasecmp(cmdbuf, "RWHO", 4))
1048            && (strncasecmp(cmdbuf, "TIME", 4)) ) {
1049                 strcpy(CC->lastcmdname, "    ");
1050                 safestrncpy(CC->lastcmdname, cmdbuf, sizeof(CC->lastcmdname));
1051                 time(&CC->lastidle);
1052         }
1053
1054         CtdlThreadName(cmdbuf);
1055
1056         if ((strncasecmp(cmdbuf, "ENT0", 4))
1057            && (strncasecmp(cmdbuf, "MESG", 4))
1058            && (strncasecmp(cmdbuf, "MSGS", 4)))
1059         {
1060            CC->cs_flags &= ~CS_POSTING;
1061         }
1062
1063         if (!strncasecmp(cmdbuf, "NOOP", 4)) {
1064                 cprintf("%d%cok\n", CIT_OK, CtdlCheckExpress() );
1065         }
1066
1067         else if (!strncasecmp(cmdbuf, "XYZZY", 5)) {
1068                 cprintf("%d Nothing happens.\n", CIT_OK);
1069         }
1070
1071         else if (!strncasecmp(cmdbuf, "QNOP", 4)) {
1072                 /* do nothing, this command returns no response */
1073         }
1074
1075         else if (!strncasecmp(cmdbuf,"QUIT",4)) {
1076                 cprintf("%d Goodbye.\n", CIT_OK);
1077                 CC->kill_me = 1;
1078         }
1079
1080         else if (!strncasecmp(cmdbuf,"ASYN",4)) {
1081                 cmd_asyn(&cmdbuf[5]);
1082         }
1083
1084         else if (!strncasecmp(cmdbuf,"LOUT",4)) {
1085                 if (CC->logged_in) logout();
1086                 cprintf("%d logged out.\n", CIT_OK);
1087         }
1088
1089         else if (!strncasecmp(cmdbuf,"USER",4)) {
1090                 cmd_user(&cmdbuf[5]);
1091         }
1092
1093         else if (!strncasecmp(cmdbuf,"PASS",4)) {
1094                 cmd_pass(&cmdbuf[5]);
1095         }
1096
1097         else if (!strncasecmp(cmdbuf,"NEWU",4)) {
1098                 cmd_newu(&cmdbuf[5]);
1099         }
1100
1101         else if (!strncasecmp(cmdbuf,"CREU",4)) {
1102                 cmd_creu(&cmdbuf[5]);
1103         }
1104
1105         else if (!strncasecmp(cmdbuf,"SETP",4)) {
1106                 cmd_setp(&cmdbuf[5]);
1107         }
1108
1109         else if (!strncasecmp(cmdbuf,"LRMS",4)) {
1110                 cmd_lrms(&cmdbuf[5]);
1111         }
1112
1113         else if (!strncasecmp(cmdbuf,"LKRA",4)) {
1114                 cmd_lkra(&cmdbuf[5]);
1115         }
1116
1117         else if (!strncasecmp(cmdbuf,"LKRN",4)) {
1118                 cmd_lkrn(&cmdbuf[5]);
1119         }
1120
1121         else if (!strncasecmp(cmdbuf,"LKRO",4)) {
1122                 cmd_lkro(&cmdbuf[5]);
1123         }
1124
1125         else if (!strncasecmp(cmdbuf,"LZRM",4)) {
1126                 cmd_lzrm(&cmdbuf[5]);
1127         }
1128
1129         else if (!strncasecmp(cmdbuf,"LPRM",4)) {
1130                 cmd_lprm(&cmdbuf[5]);
1131         }
1132
1133         else if (!strncasecmp(cmdbuf,"GETU",4)) {
1134                 cmd_getu();
1135         }
1136
1137         else if (!strncasecmp(cmdbuf,"SETU",4)) {
1138                 cmd_setu(&cmdbuf[5]);
1139         }
1140
1141         else if (!strncasecmp(cmdbuf,"GOTO",4)) {
1142                 cmd_goto(&cmdbuf[5]);
1143         }
1144
1145         else if (!strncasecmp(cmdbuf,"MSGS",4)) {
1146                 cmd_msgs(&cmdbuf[5]);
1147         }
1148
1149         else if (!strncasecmp(cmdbuf,"WHOK",4)) {
1150                 cmd_whok();
1151         }
1152
1153         else if (!strncasecmp(cmdbuf,"RDIR",4)) {
1154                 cmd_rdir();
1155         }
1156
1157         else if (!strncasecmp(cmdbuf,"EUID",4)) {
1158                 cmd_euid(&cmdbuf[5]);
1159         }
1160
1161         else if (!strncasecmp(cmdbuf,"MSG0",4)) {
1162                 cmd_msg0(&cmdbuf[5]);
1163         }
1164
1165         else if (!strncasecmp(cmdbuf,"MSG2",4)) {
1166                 cmd_msg2(&cmdbuf[5]);
1167         }
1168
1169         else if (!strncasecmp(cmdbuf,"MSG3",4)) {
1170                 cmd_msg3(&cmdbuf[5]);
1171         }
1172
1173         else if (!strncasecmp(cmdbuf,"MSG4",4)) {
1174                 cmd_msg4(&cmdbuf[5]);
1175         }
1176
1177         else if (!strncasecmp(cmdbuf,"MSGP",4)) {
1178                 cmd_msgp(&cmdbuf[5]);
1179         }
1180
1181         else if (!strncasecmp(cmdbuf,"OPNA",4)) {
1182                 cmd_opna(&cmdbuf[5]);
1183         }
1184
1185         else if (!strncasecmp(cmdbuf,"DLAT",4)) {
1186                 cmd_dlat(&cmdbuf[5]);
1187         }
1188
1189         else if (!strncasecmp(cmdbuf,"INFO",4)) {
1190                 cmd_info();
1191         }
1192
1193         else if (!strncasecmp(cmdbuf,"SLRP",4)) {
1194                 cmd_slrp(&cmdbuf[5]);
1195         }
1196
1197         else if (!strncasecmp(cmdbuf,"INVT",4)) {
1198                 cmd_invt_kick(&cmdbuf[5],1);
1199         }
1200
1201         else if (!strncasecmp(cmdbuf,"KICK",4)) {
1202                 cmd_invt_kick(&cmdbuf[5],0);
1203         }
1204
1205         else if (!strncasecmp(cmdbuf,"GETR",4)) {
1206                 cmd_getr();
1207         }
1208
1209         else if (!strncasecmp(cmdbuf,"SETR",4)) {
1210                 cmd_setr(&cmdbuf[5]);
1211         }
1212
1213         else if (!strncasecmp(cmdbuf,"GETA",4)) {
1214                 cmd_geta();
1215         }
1216
1217         else if (!strncasecmp(cmdbuf,"SETA",4)) {
1218                 cmd_seta(&cmdbuf[5]);
1219         }
1220
1221         else if (!strncasecmp(cmdbuf,"ENT0",4)) {
1222                 cmd_ent0(&cmdbuf[5]);
1223         }
1224
1225         else if (!strncasecmp(cmdbuf,"RINF",4)) {
1226                 cmd_rinf();
1227         }
1228
1229         else if (!strncasecmp(cmdbuf,"DELE",4)) {
1230                 cmd_dele(&cmdbuf[5]);
1231         }
1232
1233         else if (!strncasecmp(cmdbuf,"KILL",4)) {
1234                 cmd_kill(&cmdbuf[5]);
1235         }
1236
1237         else if (!strncasecmp(cmdbuf,"CRE8",4)) {
1238                 cmd_cre8(&cmdbuf[5]);
1239         }
1240
1241         else if (!strncasecmp(cmdbuf,"MOVE",4)) {
1242                 cmd_move(&cmdbuf[5]);
1243         }
1244
1245         else if (!strncasecmp(cmdbuf,"FORG",4)) {
1246                 cmd_forg();
1247         }
1248
1249         else if (!strncasecmp(cmdbuf,"MESG",4)) {
1250                 cmd_mesg(&cmdbuf[5]);
1251         }
1252
1253         else if (!strncasecmp(cmdbuf,"EMSG",4)) {
1254                 cmd_emsg(&cmdbuf[5]);
1255         }
1256
1257         else if (!strncasecmp(cmdbuf,"GNUR",4)) {
1258                 cmd_gnur();
1259         }
1260
1261         else if (!strncasecmp(cmdbuf,"VALI",4)) {
1262                 cmd_vali(&cmdbuf[5]);
1263         }
1264
1265         else if (!strncasecmp(cmdbuf,"EINF",4)) {
1266                 cmd_einf(&cmdbuf[5]);
1267         }
1268
1269         else if (!strncasecmp(cmdbuf,"LIST",4)) {
1270                 cmd_list(&cmdbuf[5]);
1271         }
1272
1273         else if (!strncasecmp(cmdbuf,"CHEK",4)) {
1274                 cmd_chek();
1275         }
1276
1277         else if (!strncasecmp(cmdbuf,"DELF",4)) {
1278                 cmd_delf(&cmdbuf[5]);
1279         }
1280
1281         else if (!strncasecmp(cmdbuf,"MOVF",4)) {
1282                 cmd_movf(&cmdbuf[5]);
1283         }
1284
1285         else if (!strncasecmp(cmdbuf,"NETF",4)) {
1286                 cmd_netf(&cmdbuf[5]);
1287         }
1288
1289         else if (!strncasecmp(cmdbuf,"OPEN",4)) {
1290                 cmd_open(&cmdbuf[5]);
1291         }
1292
1293         else if (!strncasecmp(cmdbuf,"CLOS",4)) {
1294                 cmd_clos();
1295         }
1296
1297         else if (!strncasecmp(cmdbuf,"UOPN",4)) {
1298                 cmd_uopn(&cmdbuf[5]);
1299         }
1300
1301         else if (!strncasecmp(cmdbuf,"UCLS",4)) {
1302                 cmd_ucls(&cmdbuf[5]);
1303         }
1304
1305         else if (!strncasecmp(cmdbuf,"READ",4)) {
1306                 cmd_read(&cmdbuf[5]);
1307         }
1308
1309         else if (!strncasecmp(cmdbuf,"WRIT",4)) {
1310                 cmd_writ(&cmdbuf[5]);
1311         }
1312
1313         else if (!strncasecmp(cmdbuf,"QUSR",4)) {
1314                 cmd_qusr(&cmdbuf[5]);
1315         }
1316
1317         else if (!strncasecmp(cmdbuf,"ECHO",4)) {
1318                 cmd_echo(&cmdbuf[5]);
1319         }
1320
1321         else if (!strncasecmp(cmdbuf,"OIMG",4)) {
1322                 cmd_oimg(&cmdbuf[5]);
1323         }
1324
1325         else if (!strncasecmp(cmdbuf,"MORE",4)) {
1326                 cmd_more();
1327         }
1328
1329         else if (!strncasecmp(cmdbuf,"NDOP",4)) {
1330                 cmd_ndop(&cmdbuf[5]);
1331         }
1332
1333         else if (!strncasecmp(cmdbuf,"NUOP",4)) {
1334                 cmd_nuop(&cmdbuf[5]);
1335         }
1336
1337         else if (!strncasecmp(cmdbuf,"LFLR",4)) {
1338                 cmd_lflr();
1339         }
1340
1341         else if (!strncasecmp(cmdbuf,"CFLR",4)) {
1342                 cmd_cflr(&cmdbuf[5]);
1343         }
1344
1345         else if (!strncasecmp(cmdbuf,"KFLR",4)) {
1346                 cmd_kflr(&cmdbuf[5]);
1347         }
1348
1349         else if (!strncasecmp(cmdbuf,"EFLR",4)) {
1350                 cmd_eflr(&cmdbuf[5]);
1351         }
1352
1353         else if (!strncasecmp(cmdbuf,"IDEN",4)) {
1354                 cmd_iden(&cmdbuf[5]);
1355         }
1356
1357         else if (!strncasecmp(cmdbuf,"IPGM",4)) {
1358                 cmd_ipgm(&cmdbuf[5]);
1359         }
1360
1361         else if (!strncasecmp(cmdbuf,"TERM",4)) {
1362                 cmd_term(&cmdbuf[5]);
1363         }
1364
1365         else if (!strncasecmp(cmdbuf,"DOWN",4)) {
1366                 cmd_down(&cmdbuf[5]);
1367         }
1368
1369         else if (!strncasecmp(cmdbuf,"HALT",4)) {
1370                 cmd_halt();
1371         }
1372
1373         else if (!strncasecmp(cmdbuf,"SCDN",4)) {
1374                 cmd_scdn(&cmdbuf[5]);
1375         }
1376
1377         else if (!strncasecmp(cmdbuf, "UIMG", 4)) {
1378                 cmd_uimg(&cmdbuf[5]);
1379         }
1380
1381         else if (!strncasecmp(cmdbuf, "TIME", 4)) {
1382                 cmd_time();
1383         }
1384
1385         else if (!strncasecmp(cmdbuf, "AGUP", 4)) {
1386                 cmd_agup(&cmdbuf[5]);
1387         }
1388
1389         else if (!strncasecmp(cmdbuf, "ASUP", 4)) {
1390                 cmd_asup(&cmdbuf[5]);
1391         }
1392
1393         else if (!strncasecmp(cmdbuf, "GPEX", 4)) {
1394                 cmd_gpex(&cmdbuf[5]);
1395         }
1396
1397         else if (!strncasecmp(cmdbuf, "SPEX", 4)) {
1398                 cmd_spex(&cmdbuf[5]);
1399         }
1400
1401         else if (!strncasecmp(cmdbuf, "CONF", 4)) {
1402                 cmd_conf(&cmdbuf[5]);
1403         }
1404
1405         else if (!strncasecmp(cmdbuf, "SEEN", 4)) {
1406                 cmd_seen(&cmdbuf[5]);
1407         }
1408
1409         else if (!strncasecmp(cmdbuf, "GTSN", 4)) {
1410                 cmd_gtsn(&cmdbuf[5]);
1411         }
1412
1413         else if (!strncasecmp(cmdbuf, "VIEW", 4)) {
1414                 cmd_view(&cmdbuf[5]);
1415         }
1416
1417         else if (!strncasecmp(cmdbuf, "ISME", 4)) {
1418                 cmd_isme(&cmdbuf[5]);
1419         }
1420
1421         else if (!strncasecmp(cmdbuf, "RENU", 4)) {
1422                 cmd_renu(&cmdbuf[5]);
1423         }
1424
1425         else if (!DLoader_Exec_Cmd(cmdbuf)) {
1426                 cprintf("%d Unrecognized or unsupported command.\n", ERROR + CMD_NOT_SUPPORTED);
1427         }
1428
1429         unbuffer_output();
1430
1431         /* Run any after-each-command routines registered by modules */
1432         PerformSessionHooks(EVT_CMD);
1433         CtdlThreadName(old_name);
1434 }
1435
1436
1437 /*
1438  * This loop performs all asynchronous functions.
1439  */
1440 void do_async_loop(void) {
1441         PerformSessionHooks(EVT_ASYNC);
1442 }