citadel/serv_chat.c

   1 /*
   2  * serv_chat.c
   3  *
   4  * This module handles all "real time" communication between users.  The
   5  * modes of communication currently supported are Chat and Paging.
   6  *
   7  * $Id$
   8  */
   9 #include "sysdep.h"
  10 #include <stdlib.h>
  11 #include <unistd.h>
  12 #include <stdio.h>
  13 #include <fcntl.h>
  14 #include <signal.h>
  15 #include <pwd.h>
  16 #include <errno.h>
  17 #include <sys/types.h>
  18 #include <sys/time.h>
  19 #include <sys/wait.h>
  20 #include <string.h>
  21 #include <limits.h>
  22 #ifdef HAVE_PTHREAD_H
  23 #include <pthread.h>
  24 #endif
  25 #include "citadel.h"
  26 #include "server.h"
  27 #include <syslog.h>
  28 #ifdef HAVE_SYS_SELECT_H
  29 #include <sys/select.h>
  30 #endif
  31 #include "serv_chat.h"
  32 #include "sysdep_decls.h"
  33 #include "citserver.h"
  34 #include "support.h"
  35 #include "config.h"
  36 #include "dynloader.h"
  37 #include "tools.h"
  38 #include "msgbase.h"
  39
  40 struct ChatLine *ChatQueue = NULL;
  41 int ChatLastMsg = 0;
  42
  43 extern struct CitContext *ContextList;
  44
  45 #define MODULE_NAME     "Chat module"
  46 #define MODULE_AUTHOR   "Art Cancro"
  47 #define MODULE_EMAIL    "ajc@uncnsrd.mt-kisco.ny.us"
  48 #define MAJOR_VERSION   2
  49 #define MINOR_VERSION   0
  50
  51 static struct DLModule_Info info =
  52 {
  53         MODULE_NAME,
  54         MODULE_AUTHOR,
  55         MODULE_EMAIL,
  56         MAJOR_VERSION,
  57         MINOR_VERSION
  58 };
  59
  60 struct DLModule_Info *Dynamic_Module_Init(void)
  61 {
  62         CtdlSendExpressMessageFunc = send_express_message;
  63
  64         CtdlRegisterProtoHook(cmd_chat, "CHAT", "Begin real-time chat");
  65         CtdlRegisterProtoHook(cmd_pexp, "PEXP", "Poll for express messages");
  66         CtdlRegisterProtoHook(cmd_gexp, "GEXP", "Get express messages");
  67         CtdlRegisterProtoHook(cmd_sexp, "SEXP", "Send an express message");
  68         CtdlRegisterSessionHook(delete_express_messages, EVT_STOP);
  69         return &info;
  70 }
  71
  72 void allwrite(char *cmdbuf, int flag, char *roomname, char *username)
  73 {
  74         FILE *fp;
  75         char bcast[256];
  76         char *un;
  77         struct ChatLine *clptr, *clnew;
  78         time_t now;
  79
  80         if (CC->fake_username[0])
  81                 un = CC->fake_username;
  82         else
  83                 un = CC->usersupp.fullname;
  84         if (flag == 1) {
  85                 snprintf(bcast, sizeof bcast, ":|<%s %s>", un, cmdbuf);
  86         } else if (flag == 0) {
  87                 snprintf(bcast, sizeof bcast, "%s|%s", un, cmdbuf);
  88         } else if (flag == 2) {
  89                 snprintf(bcast, sizeof bcast, ":|<%s whispers %s>", un, cmdbuf);
  90         }
  91         if ((strcasecmp(cmdbuf, "NOOP")) && (flag != 2)) {
  92                 fp = fopen(CHATLOG, "a");
  93                 fprintf(fp, "%s\n", bcast);
  94                 fclose(fp);
  95         }
  96         clnew = (struct ChatLine *) mallok(sizeof(struct ChatLine));
  97         memset(clnew, 0, sizeof(struct ChatLine));
  98         if (clnew == NULL) {
  99                 fprintf(stderr, "citserver: cannot alloc chat line: %s\n",
 100                         strerror(errno));
 101                 return;
 102         }
 103         time(&now);
 104         clnew->next = NULL;
 105         clnew->chat_time = now;
 106         strncpy(clnew->chat_room, roomname, sizeof clnew->chat_room);
 107         clnew->chat_room[sizeof clnew->chat_room - 1] = 0;
 108         if (username) {
 109                 strncpy(clnew->chat_username, username,
 110                         sizeof clnew->chat_username);
 111                 clnew->chat_username[sizeof clnew->chat_username - 1] = 0;
 112         } else
 113                 clnew->chat_username[0] = '\0';
 114         safestrncpy(clnew->chat_text, bcast, sizeof clnew->chat_text);
 115
 116         /* Here's the critical section.
 117          * First, add the new message to the queue...
 118          */
 119         begin_critical_section(S_CHATQUEUE);
 120         ++ChatLastMsg;
 121         clnew->chat_seq = ChatLastMsg;
 122         if (ChatQueue == NULL) {
 123                 ChatQueue = clnew;
 124         } else {
 125                 for (clptr = ChatQueue; clptr->next != NULL; clptr = clptr->next);;
 126                 clptr->next = clnew;
 127         }
 128
 129         /* Then, before releasing the lock, free the expired messages */
 130         while (1) {
 131                 if (ChatQueue == NULL)
 132                         goto DONE_FREEING;
 133                 if ((now - ChatQueue->chat_time) < 120L)
 134                         goto DONE_FREEING;
 135                 clptr = ChatQueue;
 136                 ChatQueue = ChatQueue->next;
 137                 phree(clptr);
 138         }
 139       DONE_FREEING:end_critical_section(S_CHATQUEUE);
 140 }
 141
 142
 143 t_context *find_context(char **unstr)
 144 {
 145         t_context *t_cc, *found_cc = NULL;
 146         char *name, *tptr;
 147
 148         if ((!*unstr) || (!unstr))
 149                 return (NULL);
 150
 151         begin_critical_section(S_SESSION_TABLE);
 152         for (t_cc = ContextList; ((t_cc) && (!found_cc)); t_cc = t_cc->next) {
 153                 if (t_cc->fake_username[0])
 154                         name = t_cc->fake_username;
 155                 else
 156                         name = t_cc->curr_user;
 157                 tptr = *unstr;
 158                 if ((!strncasecmp(name, tptr, strlen(name))) && (tptr[strlen(name)] == ' ')) {
 159                         found_cc = t_cc;
 160                         *unstr = &(tptr[strlen(name) + 1]);
 161                 }
 162         }
 163         end_critical_section(S_SESSION_TABLE);
 164
 165         return (found_cc);
 166 }
 167
 168 /*
 169  * List users in chat.
 170  * allflag ==   0 = list users in chat
 171  *              1 = list users in chat, followed by users not in chat
 172  *              2 = display count only
 173  */
 174
 175 void do_chat_listing(int allflag)
 176 {
 177         struct CitContext *ccptr;
 178         int count = 0;
 179
 180         if ((allflag == 0) || (allflag == 1))
 181                 cprintf(":|\n:| Users currently in chat:\n");
 182         begin_critical_section(S_SESSION_TABLE);
 183         for (ccptr = ContextList; ccptr != NULL; ccptr = ccptr->next) {
 184                 if (!strcasecmp(ccptr->cs_room, "<chat>")) ++count;
 185                 if ((!strcasecmp(ccptr->cs_room, "<chat>"))
 186                     && ((ccptr->cs_flags & CS_STEALTH) == 0)) {
 187                         if ((allflag == 0) || (allflag == 1))
 188                                 cprintf(":| %-25s <%s>\n", (ccptr->fake_username[0]) ? ccptr->fake_username : ccptr->curr_user, ccptr->chat_room);
 189                 }
 190         }
 191
 192         if (allflag == 1) {
 193                 cprintf(":|\n:| Users not in chat:\n");
 194                 for (ccptr = ContextList; ccptr != NULL; ccptr = ccptr->next) {
 195                         if ((strcasecmp(ccptr->cs_room, "<chat>"))
 196                             && ((ccptr->cs_flags & CS_STEALTH) == 0)) {
 197                                 cprintf(":| %-25s <%s>:\n", (ccptr->fake_username[0]) ? ccptr->fake_username : ccptr->curr_user, (ccptr->fake_roomname[0]) ? ccptr->fake_roomname : ccptr->cs_room);
 198                         }
 199                 }
 200         }
 201         end_critical_section(S_SESSION_TABLE);
 202
 203         if (allflag == 2) {
 204                 if (count > 1)
 205                         cprintf(":|There are %d users here.\n", count);
 206                 else
 207                         cprintf(":|Note: you are the only one here.\n");
 208         }
 209
 210         cprintf(":|\n");
 211 }
 212
 213
 214 void cmd_chat(char *argbuf)
 215 {
 216         char cmdbuf[256];
 217         char *un;
 218         char *strptr1;
 219         char hold_cs_room[ROOMNAMELEN];
 220         int MyLastMsg, ThisLastMsg;
 221         struct ChatLine *clptr;
 222         struct CitContext *t_context;
 223         int retval;
 224
 225         if (!(CC->logged_in)) {
 226                 cprintf("%d Not logged in.\n", ERROR + NOT_LOGGED_IN);
 227                 return;
 228         }
 229         strcpy(CC->chat_room, "Main room");
 230
 231         safestrncpy(hold_cs_room, CC->cs_room, sizeof hold_cs_room);
 232         CC->cs_flags = CC->cs_flags | CS_CHAT;
 233         set_wtmpsupp("<chat>");
 234         cprintf("%d Entering chat mode (type '/help' for available commands)\n",
 235                 START_CHAT_MODE);
 236
 237         MyLastMsg = ChatLastMsg;
 238
 239         if ((CC->cs_flags & CS_STEALTH) == 0) {
 240                 allwrite("<entering chat>", 0, CC->chat_room, NULL);
 241         }
 242         strcpy(cmdbuf, "");
 243
 244         do_chat_listing(2);
 245
 246         while (1) {
 247                 int ok_cmd;
 248
 249                 ok_cmd = 0;
 250                 cmdbuf[strlen(cmdbuf) + 1] = 0;
 251                 retval = client_read_to(&cmdbuf[strlen(cmdbuf)], 1, 2);
 252
 253                 /* if we have a complete line, do send processing */
 254                 if (strlen(cmdbuf) > 0)
 255                         if (cmdbuf[strlen(cmdbuf) - 1] == 10) {
 256                                 cmdbuf[strlen(cmdbuf) - 1] = 0;
 257                                 time(&CC->lastcmd);
 258                                 time(&CC->lastidle);
 259
 260                                 if ((!strcasecmp(cmdbuf, "exit"))
 261                                     || (!strcasecmp(cmdbuf, "/exit"))
 262                                     || (!strcasecmp(cmdbuf, "quit"))
 263                                     || (!strcasecmp(cmdbuf, "logout"))
 264                                     || (!strcasecmp(cmdbuf, "logoff"))
 265                                     || (!strcasecmp(cmdbuf, "/q"))
 266                                     || (!strcasecmp(cmdbuf, ".q"))
 267                                     || (!strcasecmp(cmdbuf, "/quit"))
 268                                     )
 269                                         strcpy(cmdbuf, "000");
 270
 271                                 if (!strcmp(cmdbuf, "000")) {
 272                                         if ((CC->cs_flags & CS_STEALTH) == 0) {
 273                                                 allwrite("<exiting chat>", 0, CC->chat_room, NULL);
 274                                         }
 275                                         sleep(1);
 276                                         cprintf("000\n");
 277                                         CC->cs_flags = CC->cs_flags - CS_CHAT;
 278                                         set_wtmpsupp(hold_cs_room);
 279                                         return;
 280                                 }
 281                                 if ((!strcasecmp(cmdbuf, "/help"))
 282                                     || (!strcasecmp(cmdbuf, "help"))
 283                                     || (!strcasecmp(cmdbuf, "/?"))
 284                                     || (!strcasecmp(cmdbuf, "?"))) {
 285                                         cprintf(":|\n");
 286                                         cprintf(":|Available commands: \n");
 287                                         cprintf(":|/help   (prints this message) \n");
 288                                         cprintf(":|/who    (list users currently in chat) \n");
 289                                         cprintf(":|/whobbs (list users in chat -and- elsewhere) \n");
 290                                         cprintf(":|/me     ('action' line, ala irc) \n");
 291                                         cprintf(":|/msg    (send private message, ala irc) \n");
 292                                         cprintf(":|/join   (join new room) \n");
 293                                         cprintf(":|/quit   (return to the BBS) \n");
 294                                         cprintf(":|\n");
 295                                         ok_cmd = 1;
 296                                 }
 297                                 if (!strcasecmp(cmdbuf, "/who")) {
 298                                         do_chat_listing(0);
 299                                         ok_cmd = 1;
 300                                 }
 301                                 if (!strcasecmp(cmdbuf, "/whobbs")) {
 302                                         do_chat_listing(1);
 303                                         ok_cmd = 1;
 304                                 }
 305                                 if (!strncasecmp(cmdbuf, "/me ", 4)) {
 306                                         allwrite(&cmdbuf[4], 1, CC->chat_room, NULL);
 307                                         ok_cmd = 1;
 308                                 }
 309                                 if (!strncasecmp(cmdbuf, "/msg ", 5)) {
 310                                         ok_cmd = 1;
 311                                         strptr1 = &cmdbuf[5];
 312                                         if ((t_context = find_context(&strptr1))) {
 313                                                 allwrite(strptr1, 2, "", CC->curr_user);
 314                                                 if (strcasecmp(CC->curr_user, t_context->curr_user))
 315                                                         allwrite(strptr1, 2, "", t_context->curr_user);
 316                                         } else
 317                                                 cprintf(":|User not found.\n", cmdbuf);
 318                                         cprintf("\n");
 319                                 }
 320                                 if (!strncasecmp(cmdbuf, "/join ", 6)) {
 321                                         ok_cmd = 1;
 322                                         allwrite("<changing rooms>", 0, CC->chat_room, NULL);
 323                                         if (!cmdbuf[6])
 324                                                 strcpy(CC->chat_room, "Main room");
 325                                         else {
 326                                                 strncpy(CC->chat_room, &cmdbuf[6],
 327                                                    sizeof CC->chat_room);
 328                                                 CC->chat_room[sizeof CC->chat_room - 1] = 0;
 329                                         }
 330                                         allwrite("<joining room>", 0, CC->chat_room, NULL);
 331                                         cprintf("\n");
 332                                 }
 333                                 if ((cmdbuf[0] != '/') && (strlen(cmdbuf) > 0)) {
 334                                         ok_cmd = 1;
 335                                         allwrite(cmdbuf, 0, CC->chat_room, NULL);
 336                                 }
 337                                 if ((!ok_cmd) && (cmdbuf[0]) && (cmdbuf[0] != '\n'))
 338                                         cprintf(":|Command %s is not understood.\n", cmdbuf);
 339
 340                                 strcpy(cmdbuf, "");
 341
 342                         }
 343                 /* now check the queue for new incoming stuff */
 344
 345                 if (CC->fake_username[0])
 346                         un = CC->fake_username;
 347                 else
 348                         un = CC->curr_user;
 349                 if (ChatLastMsg > MyLastMsg) {
 350                         ThisLastMsg = ChatLastMsg;
 351                         for (clptr = ChatQueue; clptr != NULL; clptr = clptr->next) {
 352                                 if ((clptr->chat_seq > MyLastMsg) && ((!clptr->chat_username[0]) || (!strncasecmp(un, clptr->chat_username, 32)))) {
 353                                         if ((!clptr->chat_room[0]) || (!strncasecmp(CC->chat_room, clptr->chat_room, ROOMNAMELEN))) {
 354                                                 cprintf("%s\n", clptr->chat_text);
 355                                         }
 356                                 }
 357                         }
 358                         MyLastMsg = ThisLastMsg;
 359                 }
 360         }
 361 }
 362
 363
 364
 365 /*
 366  * Delete any remaining express messages
 367  */
 368 void delete_express_messages(void) {
 369         struct ExpressMessage *ptr;
 370
 371         begin_critical_section(S_SESSION_TABLE);
 372         while (CC->FirstExpressMessage != NULL) {
 373                 ptr = CC->FirstExpressMessage->next;
 374                 if (CC->FirstExpressMessage->text != NULL)
 375                         phree(CC->FirstExpressMessage->text);
 376                 phree(CC->FirstExpressMessage);
 377                 CC->FirstExpressMessage = ptr;
 378                 }
 379         end_critical_section(S_SESSION_TABLE);
 380         }
 381
 382
 383
 384
 385 /*
 386  * Poll for express messages (OLD METHOD -- ***DEPRECATED ***)
 387  */
 388 void cmd_pexp(char *argbuf)
 389 {
 390         struct ExpressMessage *ptr, *holdptr;
 391
 392         if (CC->FirstExpressMessage == NULL) {
 393                 cprintf("%d No express messages waiting.\n", ERROR);
 394                 return;
 395         }
 396         begin_critical_section(S_SESSION_TABLE);
 397         ptr = CC->FirstExpressMessage;
 398         CC->FirstExpressMessage = NULL;
 399         end_critical_section(S_SESSION_TABLE);
 400
 401         cprintf("%d Express msgs:\n", LISTING_FOLLOWS);
 402         while (ptr != NULL) {
 403                 if (ptr->flags && EM_BROADCAST)
 404                         cprintf("Broadcast message ");
 405                 else if (ptr->flags && EM_CHAT)
 406                         cprintf("Chat request ");
 407                 else if (ptr->flags && EM_GO_AWAY)
 408                         cprintf("Please logoff now, as requested ");
 409                 else
 410                         cprintf("Message ");
 411                 cprintf("from %s:\n", ptr->sender);
 412                 if (ptr->text != NULL)
 413                         memfmout(80, ptr->text, 0);
 414
 415                 holdptr = ptr->next;
 416                 if (ptr->text != NULL) phree(ptr->text);
 417                 phree(ptr);
 418                 ptr = holdptr;
 419         }
 420         cprintf("000\n");
 421 }
 422
 423
 424 /*
 425  * Get express messages (new method)
 426  */
 427 void cmd_gexp(char *argbuf) {
 428         struct ExpressMessage *ptr;
 429
 430         if (CC->FirstExpressMessage == NULL) {
 431                 cprintf("%d No express messages waiting.\n", ERROR);
 432                 return;
 433         }
 434
 435         begin_critical_section(S_SESSION_TABLE);
 436         ptr = CC->FirstExpressMessage;
 437         CC->FirstExpressMessage = CC->FirstExpressMessage->next;
 438         end_critical_section(S_SESSION_TABLE);
 439
 440         cprintf("%d %d|%ld|%d|%s|%s\n",
 441                 LISTING_FOLLOWS,
 442                 ((ptr->next != NULL) ? 1 : 0),          /* more msgs? */
 443                 ptr->timestamp,                         /* time sent */
 444                 ptr->flags,                             /* flags */
 445                 ptr->sender,                            /* sender of msg */
 446                 config.c_nodename);                     /* static for now */
 447         if (ptr->text != NULL) {
 448                 memfmout(80, ptr->text, 0);
 449                 if (ptr->text[strlen(ptr->text)-1] != '\n') cprintf("\n");
 450                 phree(ptr->text);
 451                 }
 452         cprintf("000\n");
 453         phree(ptr);
 454 }
 455
 456
 457
 458 /*
 459  * This is the back end to the express message sending function.
 460  * Returns the number of users to which the message was sent.
 461  * Sending a zero-length message tests for recipients without sending messages.
 462  */
 463 int send_express_message(char *lun, char *x_user, char *x_msg)
 464 {
 465         int message_sent = 0;
 466         struct CitContext *ccptr;
 467         struct ExpressMessage *newmsg, *findend;
 468         char *un;
 469         FILE *fp;
 470         size_t msglen = 0;
 471         int do_send = 0;
 472
 473         if (strlen(x_msg) > 0) {
 474                 msglen = strlen(x_msg) + 4;
 475                 do_send = 1;
 476                 }
 477
 478         /* find the target user's context and append the message */
 479         begin_critical_section(S_SESSION_TABLE);
 480         for (ccptr = ContextList; ccptr != NULL; ccptr = ccptr->next) {
 481
 482                 if (ccptr->fake_username[0])    /* <bc> */
 483                         un = ccptr->fake_username;
 484                 else
 485                         un = ccptr->usersupp.fullname;
 486
 487                 if ((!strcasecmp(un, x_user))
 488                     || (!strcasecmp(x_user, "broadcast"))) {
 489                         if (do_send) {
 490                                 newmsg = (struct ExpressMessage *)
 491                                         mallok(sizeof (struct ExpressMessage));
 492                                 memset(newmsg, 0,
 493                                         sizeof (struct ExpressMessage));
 494                                 safestrncpy(newmsg->sender, lun,
 495                                             sizeof newmsg->sender);
 496                                 if (!strcasecmp(x_user, "broadcast"))
 497                                         newmsg->flags |= EM_BROADCAST;
 498                                 newmsg->text = mallok(msglen);
 499                                 safestrncpy(newmsg->text, x_msg, msglen);
 500
 501                                 if (ccptr->FirstExpressMessage == NULL)
 502                                         ccptr->FirstExpressMessage = newmsg;
 503                                 else {
 504                                         findend = ccptr->FirstExpressMessage;
 505                                         while (findend->next != NULL)
 506                                                 findend = findend->next;
 507                                         findend->next = newmsg;
 508                                 }
 509                         }
 510                         ++message_sent;
 511                 }
 512         }
 513         end_critical_section(S_SESSION_TABLE);
 514
 515         /* Log the page to disk if configured to do so */
 516         if ((strlen(config.c_logpages) > 0) && (do_send) ) {
 517                 fp = fopen(CC->temp, "wb");
 518                 fprintf(fp, "%c%c%c", 255, MES_NORMAL, 0);
 519                 fprintf(fp, "Psysop%c", 0);
 520                 fprintf(fp, "T%ld%c", (long)time(NULL), 0);
 521                 fprintf(fp, "A%s%c", lun, 0);
 522                 fprintf(fp, "R%s%c", x_user, 0);
 523                 fprintf(fp, "O%s%c", config.c_logpages, 0);
 524                 fprintf(fp, "N%s%c", NODENAME, 0);
 525                 fprintf(fp, "M%s\n%c", x_msg, 0);
 526                 fclose(fp);
 527                 save_message(CC->temp, "", config.c_logpages, MES_LOCAL, 1);
 528                 unlink(CC->temp);
 529         }
 530         return (message_sent);
 531 }
 532
 533 /*
 534  * send express messages  <bc>
 535  */
 536 void cmd_sexp(char *argbuf)
 537 {
 538         int message_sent = 0;
 539         char x_user[256];
 540         char x_msg[256];
 541         char *lun;              /* <bc> */
 542         char *x_big_msgbuf = NULL;
 543
 544         if ((!(CC->logged_in)) && (!(CC->internal_pgm))) {
 545                 cprintf("%d Not logged in.\n", ERROR + NOT_LOGGED_IN);
 546                 return;
 547         }
 548         if (CC->fake_username[0])
 549                 lun = CC->fake_username;
 550         else
 551                 lun = CC->usersupp.fullname;
 552
 553         extract(x_user, argbuf, 0);
 554
 555         extract(x_msg, argbuf, 1);
 556
 557         if (!x_user[0]) {
 558                 cprintf("%d You were not previously paged.\n", ERROR);
 559                 return;
 560         }
 561         if ((!strcasecmp(x_user, "broadcast")) && (CC->usersupp.axlevel < 6)) {
 562                 cprintf("%d Higher access required to send a broadcast.\n",
 563                         ERROR + HIGHER_ACCESS_REQUIRED);
 564                 return;
 565         }
 566         /* This loop handles text-transfer pages */
 567         if (!strcmp(x_msg, "-")) {
 568                 message_sent = send_express_message(lun, x_user, "");
 569                 if (message_sent == 0) {
 570                         cprintf("%d No user '%s' logged in.\n", ERROR, x_user);
 571                         return;
 572                 }
 573                 cprintf("%d Transmit message (will deliver to %d users)\n",
 574                         SEND_LISTING, message_sent);
 575                 x_big_msgbuf = mallok(256);
 576                 memset(x_big_msgbuf, 0, 256);
 577                 while (client_gets(x_msg), strcmp(x_msg, "000")) {
 578                         x_big_msgbuf = reallok(x_big_msgbuf,
 579                                strlen(x_big_msgbuf) + strlen(x_msg) + 4);
 580                         if (strlen(x_big_msgbuf) > 0)
 581                            if (x_big_msgbuf[strlen(x_big_msgbuf)] != '\n')
 582                                 strcat(x_big_msgbuf, "\n");
 583                         strcat(x_big_msgbuf, x_msg);
 584                 }
 585                 send_express_message(lun, x_user, x_big_msgbuf);
 586                 phree(x_big_msgbuf);
 587
 588                 /* This loop handles inline pages */
 589         } else {
 590                 message_sent = send_express_message(lun, x_user, x_msg);
 591
 592                 if (message_sent > 0) {
 593                         if (strlen(x_msg) > 0)
 594                                 cprintf("%d Message sent", OK);
 595                         else
 596                                 cprintf("%d Ok to send message", OK);
 597                         if (message_sent > 1)
 598                                 cprintf(" to %d users", message_sent);
 599                         cprintf(".\n");
 600                 } else {
 601                         cprintf("%d No user '%s' logged in.\n", ERROR, x_user);
 602                 }
 603
 604
 605         }
 606 }