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