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