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