citadel/commands.c

   1 /*
   2  * $Id$
   3  *
   4  * This file contains functions which implement parts of the
   5  * text-mode user interface.
   6  *
   7  */
   8
   9 #include "sysdep.h"
  10 #include <stdlib.h>
  11 #include <unistd.h>
  12 #include <stdio.h>
  13 #include <fcntl.h>
  14 #include <ctype.h>
  15 #include <string.h>
  16 #include <sys/types.h>
  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 #ifdef HAVE_TERMIOS_H
  30 #include <termios.h>
  31 #else
  32 #include <sgtty.h>
  33 #endif
  34
  35 #ifdef HAVE_SYS_SELECT_H
  36 #include <sys/select.h>
  37 #endif
  38
  39 #ifdef THREADED_CLIENT
  40 #include <pthread.h>
  41 #endif
  42
  43 #include <signal.h>
  44 #include <errno.h>
  45 #include <stdarg.h>
  46 #include "citadel.h"
  47 #include "commands.h"
  48 #include "messages.h"
  49 #include "citadel_decls.h"
  50 #include "routines.h"
  51 #include "routines2.h"
  52 #include "tools.h"
  53 #include "rooms.h"
  54 #include "client_chat.h"
  55 #ifndef HAVE_SNPRINTF
  56 #include "snprintf.h"
  57 #endif
  58
  59 struct citcmd {
  60         struct citcmd *next;
  61         int c_cmdnum;
  62         int c_axlevel;
  63         char c_keys[5][64];
  64 };
  65
  66 #define IFNEXPERT if ((userflags&US_EXPERT)==0)
  67
  68
  69 int rc_exp_beep;
  70 char rc_exp_cmd[1024];
  71 int rc_allow_attachments;
  72 int rc_display_message_numbers;
  73 int rc_force_mail_prompts;
  74 int rc_remember_passwords;
  75 int rc_ansi_color;
  76 int num_urls = 0;
  77 char urls[MAXURLS][SIZ];
  78 char rc_url_cmd[SIZ];
  79
  80 char *gl_string;
  81 int next_lazy_cmd = 5;
  82
  83 int lines_printed = 0;          /* line count for paginator */
  84 extern int screenwidth, screenheight;
  85 extern int termn8;
  86
  87 struct citcmd *cmdlist = NULL;
  88
  89
  90 /* these variables are local to this module */
  91 char keepalives_enabled = KA_YES;       /* send NOOPs to server when idle */
  92 int ok_to_interrupt = 0;                /* print express msgs asynchronously */
  93 time_t AnsiDetect;                      /* when did we send the detect code? */
  94 int enable_color = 0;                   /* nonzero for ANSI color */
  95
  96
  97
  98
  99 /*
 100  * If an interesting key has been pressed, return its value, otherwise 0
 101  */
 102 char was_a_key_pressed(void) {
 103         fd_set rfds;
 104         struct timeval tv;
 105         int the_character;
 106         int retval;
 107
 108         FD_ZERO(&rfds);
 109         FD_SET(0, &rfds);
 110         tv.tv_sec = 0;
 111         tv.tv_usec = 0;
 112         retval = select(1, &rfds, NULL, NULL, &tv);
 113
 114         /* Careful!  Disable keepalives during keyboard polling; we're probably
 115          * in the middle of a data transfer from the server, in which case
 116          * sending a NOOP would throw the client protocol out of sync.
 117          */
 118         if (FD_ISSET(0, &rfds)) {
 119                 set_keepalives(KA_NO);
 120                 the_character = inkey();
 121                 set_keepalives(KA_YES);
 122         }
 123         else {
 124                 the_character = 0;
 125         }
 126         return(the_character);
 127 }
 128
 129
 130
 131
 132
 133 /*
 134  * Check to see if we need to pause at the end of a screen.
 135  * If we do, we have to disable server keepalives during the pause because
 136  * we are probably in the middle of a server operation and the NOOP command
 137  * would confuse everything.
 138  */
 139 int checkpagin(int lp, int pagin, int height)
 140 {
 141         int thekey;
 142
 143         if (sigcaught) return(lp);
 144         thekey = was_a_key_pressed();
 145         if (thekey == 'q' || thekey == 'Q' || thekey == 's' || thekey == 'S')
 146                 thekey = STOP_KEY;
 147         if (thekey == 'n' || thekey == 'N')
 148                 thekey = NEXT_KEY;
 149         if ( (thekey == NEXT_KEY) || (thekey == STOP_KEY)) sigcaught = thekey;
 150         if (sigcaught) return(lp);
 151
 152         if (!pagin) return(0);
 153         if (lp>=(height-1)) {
 154                 set_keepalives(KA_NO);
 155                 hit_any_key();
 156                 set_keepalives(KA_YES);
 157                 return(0);
 158         }
 159         return(lp);
 160 }
 161
 162
 163
 164
 165 /*
 166  * pprintf()  ...   paginated version of printf()
 167  */
 168 void pprintf(const char *format, ...) {
 169         va_list arg_ptr;
 170         static char buf[4096];  /* static for performance, change if needed */
 171         int i;
 172
 173         /* If sigcaught is nonzero, a keypress has interrupted this and we
 174          * should just drain output.
 175          */
 176         if (sigcaught) return;
 177
 178         /* Otherwise, start spewing... */
 179         va_start(arg_ptr, format);
 180         vsprintf(buf, format, arg_ptr);
 181         va_end(arg_ptr);
 182
 183         for (i=0; i<strlen(buf); ++i) {
 184                 putc(buf[i], stdout);
 185                 if (buf[i]==10) {
 186                         ++lines_printed;
 187                         lines_printed = checkpagin(lines_printed,
 188                                 (userflags & US_PAGINATOR),
 189                                 screenheight);
 190                 }
 191         }
 192 }
 193
 194
 195
 196 /*
 197  * print_express()  -  print express messages if there are any
 198  */
 199 void print_express(void)
 200 {
 201         char buf[1024];
 202         FILE *outpipe;
 203         time_t timestamp;
 204         struct tm *stamp;
 205         int flags = 0;
 206         char sender[64];
 207         char node[64];
 208
 209         if (express_msgs == 0)
 210                 return;
 211
 212         if (rc_exp_beep) {
 213                 putc(7, stdout);
 214         }
 215         if (strlen(rc_exp_cmd) == 0) {
 216                 color(BRIGHT_RED);
 217                 printf("\r---");
 218         }
 219
 220         while (express_msgs != 0) {
 221                 serv_puts("GEXP");
 222                 serv_gets(buf);
 223                 if (buf[0] != '1')
 224                         return;
 225
 226                 express_msgs = extract_int(&buf[4], 0);
 227                 timestamp = extract_long(&buf[4], 1);
 228                 flags = extract_int(&buf[4], 2);
 229                 extract(sender, &buf[4], 3);
 230                 extract(node, &buf[4], 4);
 231                 strcpy(last_paged, sender);
 232
 233                 stamp = localtime(&timestamp);
 234
 235                 /* If the page is a Logoff Request, honor it. */
 236                 if (flags & 2) {
 237                         termn8 = 1;
 238                         return;
 239                 }
 240
 241                 if (strlen(rc_exp_cmd) > 0) {
 242                         outpipe = popen(rc_exp_cmd, "w");
 243                         if (outpipe != NULL) {
 244                                 /* Header derived from flags */
 245                                 if (flags & 2)
 246                                         fprintf(outpipe,
 247                                                "Please log off now, as requested ");
 248                                 else if (flags & 1)
 249                                         fprintf(outpipe, "Broadcast message ");
 250                                 else if (flags & 4)
 251                                         fprintf(outpipe, "Chat request ");
 252                                 else
 253                                         fprintf(outpipe, "Message ");
 254                                 /* Timestamp.  Can this be improved? */
 255                                 if (stamp->tm_hour == 0 || stamp->tm_hour == 12)
 256                                         fprintf(outpipe, "at 12:%02d%cm",
 257                                                 stamp->tm_min,
 258                                                 stamp->tm_hour ? 'p' : 'a');
 259                                 else if (stamp->tm_hour > 12)           /* pm */
 260                                         fprintf(outpipe, "at %d:%02dpm",
 261                                                 stamp->tm_hour - 12,
 262                                                 stamp->tm_min);
 263                                 else                                    /* am */
 264                                         fprintf(outpipe, "at %d:%02dam",
 265                                                 stamp->tm_hour, stamp->tm_min);
 266                                 fprintf(outpipe, " from %s", sender);
 267                                 if (strncmp(serv_info.serv_nodename, node, 32))
 268                                         fprintf(outpipe, " @%s", node);
 269                                 fprintf(outpipe, ":\n");
 270                                 while (serv_gets(buf), strcmp(buf, "000")) {
 271                                         fprintf(outpipe, "%s\n", buf);
 272                                 }
 273                                 pclose(outpipe);
 274                                 if (express_msgs == 0)
 275                                         return;
 276                                 continue;
 277                         }
 278                 }
 279                 /* fall back to built-in express message display */
 280                 printf("\n");
 281                 lines_printed++;
 282
 283                 /* Header derived from flags */
 284                 if (flags & 2)
 285                         printf("Please log off now, as requested ");
 286                 else if (flags & 1)
 287                         printf("Broadcast message ");
 288                 else if (flags & 4)
 289                         printf("Chat request ");
 290                 else
 291                         printf("Message ");
 292
 293                 /* Timestamp.  Can this be improved? */
 294                 if (stamp->tm_hour == 0 || stamp->tm_hour == 12)/* 12am/12pm */
 295                         printf("at 12:%02d%cm", stamp->tm_min,
 296                                 stamp->tm_hour ? 'p' : 'a');
 297                 else if (stamp->tm_hour > 12)                   /* pm */
 298                         printf("at %d:%02dpm",
 299                                 stamp->tm_hour - 12, stamp->tm_min);
 300                 else                                            /* am */
 301                         printf("at %d:%02dam", stamp->tm_hour, stamp->tm_min);
 302
 303                 /* Sender */
 304                 printf(" from %s", sender);
 305
 306                 /* Remote node, if any */
 307                 if (strncmp(serv_info.serv_nodename, node, 32))
 308                         printf(" @%s", node);
 309
 310                 printf(":\n");
 311                 lines_printed++;
 312                 fmout(screenwidth, NULL, 1, screenheight, -1, 0);
 313         }
 314         printf("\n---\n");
 315         color(BRIGHT_WHITE);
 316
 317
 318 }
 319
 320
 321 void set_keepalives(int s)
 322 {
 323         keepalives_enabled = (char) s;
 324 }
 325
 326 /*
 327  * This loop handles the "keepalive" messages sent to the server when idling.
 328  */
 329
 330 static time_t idlet = 0;
 331 static void really_do_keepalive(void) {
 332         char buf[1024];
 333
 334         time(&idlet);
 335         if (keepalives_enabled == KA_YES) {
 336                 serv_puts("NOOP");
 337                 serv_gets(buf);
 338                 if (buf[3] == '*') {
 339                         express_msgs = 1;
 340                         if (ok_to_interrupt == 1) {
 341                                 printf("\r%64s\r", "");
 342                                 print_express();
 343                                 printf("%s%c ", room_name,
 344                                        room_prompt(room_flags));
 345                                 fflush(stdout);
 346                         }
 347                 }
 348         }
 349 }
 350
 351 /* threaded nonblocking keepalive stuff starts here. I'm going for a simple
 352    encapsulated interface; in theory there should be no need to touch these
 353    globals outside of the async_ka_* functions. */
 354
 355 #ifdef THREADED_CLIENT
 356 static pthread_t ka_thr_handle;
 357 static int ka_thr_active = 0;
 358 static int async_ka_enabled = 0;
 359
 360 static void *ka_thread(void *arg)
 361 {
 362         really_do_keepalive();
 363         pthread_detach(ka_thr_handle);
 364         ka_thr_active = 0;
 365         return NULL;
 366 }
 367
 368 /* start up a thread to handle a keepalive in the background */
 369 static void async_ka_exec(void)
 370 {
 371         if (!ka_thr_active) {
 372                 ka_thr_active = 1;
 373                 if (pthread_create(&ka_thr_handle, NULL, ka_thread, NULL)) {
 374                         perror("pthread_create");
 375                         exit(1);
 376                 }
 377         }
 378 }
 379 #endif /* THREADED_CLIENT */
 380
 381 static void do_keepalive(void)
 382 {
 383         time_t now;
 384
 385         time(&now);
 386         if ((now - idlet) < ((long) S_KEEPALIVE))
 387                 return;
 388
 389         /* Do a space-backspace to keep telnet sessions from idling out */
 390         printf(" %c", 8);
 391         fflush(stdout);
 392
 393 #ifdef THREADED_CLIENT
 394         if (async_ka_enabled)
 395                 async_ka_exec();
 396         else
 397 #endif
 398                 really_do_keepalive();
 399 }
 400
 401
 402 /* Now the actual async-keepalve API that we expose to higher levels:
 403    async_ka_start() and async_ka_end(). These do nothing when we don't have
 404    threading enabled, so we avoid sprinkling ifdef's throughout the code. */
 405
 406 /* wait for a background keepalive to complete. this must be done before
 407    attempting any further server requests! */
 408 void async_ka_end(void)
 409 {
 410 #ifdef THREADED_CLIENT
 411         if (ka_thr_active)
 412                 pthread_join(ka_thr_handle, NULL);
 413
 414         async_ka_enabled--;
 415 #endif
 416 }
 417
 418 /* tell do_keepalive() that keepalives are asynchronous. */
 419 void async_ka_start(void)
 420 {
 421 #ifdef THREADED_CLIENT
 422         async_ka_enabled++;
 423 #endif
 424 }
 425
 426
 427 int inkey(void)
 428 {                               /* get a character from the keyboard, with   */
 429         int a;                  /* the watchdog timer in effect if necessary */
 430         fd_set rfds;
 431         struct timeval tv;
 432         time_t start_time, now;
 433         char inbuf[2];
 434
 435         fflush(stdout);
 436         lines_printed = 0;
 437         time(&start_time);
 438
 439         do {
 440
 441                 /* This loop waits for keyboard input.  If the keepalive
 442                  * timer expires, it sends a keepalive to the server if
 443                  * necessary and then waits again.
 444                  */
 445                 do {
 446                         do_keepalive();
 447
 448                         FD_ZERO(&rfds);
 449                         FD_SET(0, &rfds);
 450                         tv.tv_sec = S_KEEPALIVE;
 451                         tv.tv_usec = 0;
 452
 453                         time(&now);
 454                         select(1, &rfds, NULL, NULL, &tv);
 455                 } while (!FD_ISSET(0, &rfds));
 456
 457
 458
 459
 460                 /* At this point, there's input, so fetch it.
 461                  * (There's a hole in the bucket...)
 462                  */
 463                 read(0, inbuf, 1);
 464                 a = inbuf[0];
 465                 if (a == 127)
 466                         a = 8;
 467                 if (a > 126)
 468                         a = 0;
 469                 if (a == 10)
 470                         a = 13;
 471                 if (((a != 4) && (a != 13) && (a != 8) && (a != NEXT_KEY) && (a != STOP_KEY))
 472                     && ((a < 32) || (a > 126)))
 473                         a = 0;
 474         } while (a == 0);
 475         return (a);
 476 }
 477
 478
 479 int yesno(void)
 480 {                               /* Returns 1 for yes, 0 for no */
 481         int a;
 482         while (1) {
 483                 a = inkey();
 484                 a = tolower(a);
 485                 if (a == 'y') {
 486                         printf("Yes\n");
 487                         return (1);
 488                 }
 489                 if (a == 'n') {
 490                         printf("No\n");
 491                         return (0);
 492                 }
 493         }
 494 }
 495
 496 /* Returns 1 for yes, 0 for no, arg is default value */
 497 int yesno_d(int d)
 498 {
 499         int a;
 500         while (1) {
 501                 a = inkey();
 502                 a = tolower(a);
 503                 if (a == 13)
 504                         a = (d ? 'y' : 'n');
 505                 if (a == 'y') {
 506                         printf("Yes\n");
 507                         return (1);
 508                 }
 509                 if (a == 'n') {
 510                         printf("No\n");
 511                         return (0);
 512                 }
 513         }
 514 }
 515
 516
 517
 518
 519 /* Gets a line from the terminal */
 520 /* string == Pointer to string buffer */
 521 /* lim == Maximum length - if negative, no-show */
 522 void getline(char *string, int lim)
 523 {
 524         int a, b;
 525         char flag = 0;
 526
 527         if (lim < 0) {
 528                 lim = (0 - lim);
 529                 flag = 1;
 530         }
 531         strcpy(string, "");
 532         gl_string = string;
 533         async_ka_start();
 534       GLA:a = inkey();
 535         a = (a & 127);
 536         if ((a == 8) && (strlen(string) == 0))
 537                 goto GLA;
 538         if ((a != 13) && (a != 8) && (strlen(string) == lim))
 539                 goto GLA;
 540         if ((a == 8) && (string[0] != 0)) {
 541                 string[strlen(string) - 1] = 0;
 542                 putc(8, stdout);
 543                 putc(32, stdout);
 544                 putc(8, stdout);
 545                 goto GLA;
 546         }
 547         if ((a == 13) || (a == 10)) {
 548                 putc(13, stdout);
 549                 putc(10, stdout);
 550                 async_ka_end();
 551                 return;
 552         }
 553         if (a < 32)
 554                 a = '.';
 555         b = strlen(string);
 556         string[b] = a;
 557         string[b + 1] = 0;
 558         if (flag == 0)
 559                 putc(a, stdout);
 560         if (flag == 1)
 561                 putc('*', stdout);
 562         goto GLA;
 563 }
 564
 565
 566 /*
 567  * strprompt()  -  prompt for a string, print the existing value and
 568  *                 allow the user to press return to keep it...
 569  */
 570 void strprompt(char *prompt, char *str, int len)
 571 {
 572         char buf[128];
 573         print_express();
 574         color(DIM_WHITE);
 575         printf("%s ", prompt);
 576         color(DIM_MAGENTA);
 577         printf("[");
 578         color(BRIGHT_MAGENTA);
 579         printf("%s", str);
 580         color(DIM_MAGENTA);
 581         printf("]");
 582         color(DIM_WHITE);
 583         printf(": ");
 584         color(BRIGHT_CYAN);
 585         getline(buf, len);
 586         if (buf[0] != 0)
 587                 strcpy(str, buf);
 588         color(DIM_WHITE);
 589 }
 590
 591 /*
 592  * boolprompt()  -  prompt for a yes/no, print the existing value and
 593  *                  allow the user to press return to keep it...
 594  */
 595 int boolprompt(char *prompt, int prev_val)
 596 {
 597         int r;
 598
 599         color(DIM_WHITE);
 600         printf("%s ", prompt);
 601         color(DIM_MAGENTA);
 602         printf(" [");
 603         color(BRIGHT_MAGENTA);
 604         printf("%s", (prev_val ? "Yes" : "No"));
 605         color(DIM_MAGENTA);
 606         printf("]: ");
 607         color(BRIGHT_CYAN);
 608         r = (yesno_d(prev_val));
 609         color(DIM_WHITE);
 610         return r;
 611 }
 612
 613 /*
 614  * intprompt()  -  like strprompt(), except for an integer
 615  *                 (note that it RETURNS the new value!)
 616  */
 617 int intprompt(char *prompt, int ival, int imin, int imax)
 618 {
 619         char buf[16];
 620         int i;
 621         int p;
 622
 623         do {
 624                 i = ival;
 625                 snprintf(buf, sizeof buf, "%d", i);
 626                 strprompt(prompt, buf, 15);
 627                 i = atoi(buf);
 628                 for (p=0; p<strlen(buf); ++p) {
 629                         if ( (!isdigit(buf[p]))
 630                            && ( (buf[p]!='-') || (p!=0) )  )
 631                                 i = imin - 1;
 632                 }
 633                 if (i < imin)
 634                         printf("*** Must be no less than %d.\n", imin);
 635                 if (i > imax)
 636                         printf("*** Must be no more than %d.\n", imax);
 637         } while ((i < imin) || (i > imax));
 638         return (i);
 639 }
 640
 641 /*
 642  * newprompt()  -  prompt for a string with no existing value
 643  *                 (clears out string buffer first)
 644  */
 645 void newprompt(char *prompt, char *str, int len)
 646 {
 647         color(BRIGHT_MAGENTA);
 648         printf("%s", prompt);
 649         color(DIM_MAGENTA);
 650         getline(str, len);
 651         color(DIM_WHITE);
 652 }
 653
 654
 655 int lkey(void)
 656 {                               /* returns a lower case value */
 657         int a;
 658         a = inkey();
 659         if (isupper(a))
 660                 a = tolower(a);
 661         return (a);
 662 }
 663
 664 /*
 665  * parse the citadel.rc file
 666  */
 667 void load_command_set(void)
 668 {
 669         FILE *ccfile;
 670         char buf[1024];
 671         struct citcmd *cptr;
 672         struct citcmd *lastcmd = NULL;
 673         int a, d;
 674         int b = 0;
 675
 676
 677         /* first, set up some defaults for non-required variables */
 678
 679         strcpy(editor_path, "");
 680         strcpy(printcmd, "");
 681         strcpy(rc_username, "");
 682         strcpy(rc_password, "");
 683         rc_floor_mode = 0;
 684         rc_exp_beep = 1;
 685         rc_allow_attachments = 0;
 686         rc_remember_passwords = 0;
 687         strcpy(rc_exp_cmd, "");
 688         rc_display_message_numbers = 0;
 689         rc_force_mail_prompts = 0;
 690         rc_ansi_color = 0;
 691         strcpy(rc_url_cmd, "");
 692         rc_encrypt = RC_DEFAULT;
 693
 694         /* now try to open the citadel.rc file */
 695
 696         ccfile = NULL;
 697         if (getenv("HOME") != NULL) {
 698                 snprintf(buf, sizeof buf, "%s/.citadelrc", getenv("HOME"));
 699                 ccfile = fopen(buf, "r");
 700         }
 701         if (ccfile == NULL) {
 702                 ccfile = fopen("/usr/local/lib/citadel.rc", "r");
 703         }
 704         if (ccfile == NULL) {
 705                 snprintf(buf, sizeof buf, "%s/citadel.rc", BBSDIR);
 706                 ccfile = fopen(buf, "r");
 707         }
 708         if (ccfile == NULL) {
 709                 ccfile = fopen("./citadel.rc", "r");
 710         }
 711         if (ccfile == NULL) {
 712                 perror("commands: cannot open citadel.rc");
 713                 logoff(errno);
 714         }
 715         while (fgets(buf, sizeof buf, ccfile) != NULL) {
 716                 while ((strlen(buf) > 0) ? (isspace(buf[strlen(buf) - 1])) : 0)
 717                         buf[strlen(buf) - 1] = 0;
 718
 719                 if (!strncasecmp(buf, "encrypt=", 8)) {
 720                         if (!strcasecmp(&buf[8], "yes"))
 721                                 rc_encrypt = RC_YES;
 722                         else if (!strcasecmp(&buf[8], "no"))
 723                                 rc_encrypt = RC_NO;
 724                         else if (!strcasecmp(&buf[8], "default"))
 725                                 rc_encrypt = RC_DEFAULT;
 726                 }
 727
 728                 if (!strncasecmp(buf, "editor=", 7))
 729                         strcpy(editor_path, &buf[7]);
 730
 731                 if (!strncasecmp(buf, "printcmd=", 9))
 732                         strcpy(printcmd, &buf[9]);
 733
 734                 if (!strncasecmp(buf, "expcmd=", 7))
 735                         strcpy(rc_exp_cmd, &buf[7]);
 736
 737                 if (!strncasecmp(buf, "local_screen_dimensions=", 24))
 738                         have_xterm = (char) atoi(&buf[24]);
 739
 740                 if (!strncasecmp(buf, "use_floors=", 11)) {
 741                         if (!strcasecmp(&buf[11], "yes"))
 742                                 rc_floor_mode = RC_YES;
 743                         if (!strcasecmp(&buf[11], "no"))
 744                                 rc_floor_mode = RC_NO;
 745                         if (!strcasecmp(&buf[11], "default"))
 746                                 rc_floor_mode = RC_DEFAULT;
 747                 }
 748                 if (!strncasecmp(buf, "beep=", 5)) {
 749                         rc_exp_beep = atoi(&buf[5]);
 750                 }
 751                 if (!strncasecmp(buf, "allow_attachments=", 18)) {
 752                         rc_allow_attachments = atoi(&buf[18]);
 753                 }
 754                 if (!strncasecmp(buf, "remember_passwords=", 19)) {
 755                         rc_remember_passwords = atoi(&buf[19]);
 756                 }
 757                 if (!strncasecmp(buf, "display_message_numbers=", 24)) {
 758                         rc_display_message_numbers = atoi(&buf[24]);
 759                 }
 760                 if (!strncasecmp(buf, "force_mail_prompts=", 19)) {
 761                         rc_force_mail_prompts = atoi(&buf[19]);
 762                 }
 763                 if (!strncasecmp(buf, "ansi_color=", 11)) {
 764                         if (!strncasecmp(&buf[11], "on", 2))
 765                                 rc_ansi_color = 1;
 766                         if (!strncasecmp(&buf[11], "auto", 4))
 767                                 rc_ansi_color = 2;      /* autodetect */
 768                         if (!strncasecmp(&buf[11], "user", 4))
 769                                 rc_ansi_color = 3;      /* user config */
 770                 }
 771                 if (!strncasecmp(buf, "username=", 9))
 772                         strcpy(rc_username, &buf[9]);
 773
 774                 if (!strncasecmp(buf, "password=", 9))
 775                         strcpy(rc_password, &buf[9]);
 776
 777                 if (!strncasecmp(buf, "urlcmd=", 7))
 778                         strcpy(rc_url_cmd, &buf[7]);
 779
 780                 if (!strncasecmp(buf, "cmd=", 4)) {
 781                         strcpy(buf, &buf[4]);
 782
 783                         cptr = (struct citcmd *) malloc(sizeof(struct citcmd));
 784
 785                         cptr->c_cmdnum = atoi(buf);
 786                         for (d = strlen(buf); d >= 0; --d)
 787                                 if (buf[d] == ',')
 788                                         b = d;
 789                         strcpy(buf, &buf[b + 1]);
 790
 791                         cptr->c_axlevel = atoi(buf);
 792                         for (d = strlen(buf); d >= 0; --d)
 793                                 if (buf[d] == ',')
 794                                         b = d;
 795                         strcpy(buf, &buf[b + 1]);
 796
 797                         for (a = 0; a < 5; ++a)
 798                                 cptr->c_keys[a][0] = 0;
 799
 800                         a = 0;
 801                         b = 0;
 802                         buf[strlen(buf) + 1] = 0;
 803                         while (strlen(buf) > 0) {
 804                                 b = strlen(buf);
 805                                 for (d = strlen(buf); d >= 0; --d)
 806                                         if (buf[d] == ',')
 807                                                 b = d;
 808                                 strncpy(cptr->c_keys[a], buf, b);
 809                                 cptr->c_keys[a][b] = 0;
 810                                 if (buf[b] == ',')
 811                                         strcpy(buf, &buf[b + 1]);
 812                                 else
 813                                         strcpy(buf, "");
 814                                 ++a;
 815                         }
 816
 817                         cptr->next = NULL;
 818                         if (cmdlist == NULL)
 819                                 cmdlist = cptr;
 820                         else
 821                                 lastcmd->next = cptr;
 822                         lastcmd = cptr;
 823                 }
 824         }
 825         fclose(ccfile);
 826 }
 827
 828
 829
 830 /*
 831  * return the key associated with a command
 832  */
 833 char keycmd(char *cmdstr)
 834 {
 835         int a;
 836
 837         for (a = 0; a < strlen(cmdstr); ++a)
 838                 if (cmdstr[a] == '&')
 839                         return (tolower(cmdstr[a + 1]));
 840         return (0);
 841 }
 842
 843
 844 /*
 845  * Output the string from a key command without the ampersand
 846  * "mode" should be set to 0 for normal or 1 for <C>ommand key highlighting
 847  */
 848 char *cmd_expand(char *strbuf, int mode)
 849 {
 850         int a;
 851         static char exp[64];
 852         char buf[1024];
 853
 854         strcpy(exp, strbuf);
 855
 856         for (a = 0; a < strlen(exp); ++a) {
 857                 if (strbuf[a] == '&') {
 858
 859                         if (mode == 0) {
 860                                 strcpy(&exp[a], &exp[a + 1]);
 861                         }
 862                         if (mode == 1) {
 863                                 exp[a] = '<';
 864                                 strcpy(buf, &exp[a + 2]);
 865                                 exp[a + 2] = '>';
 866                                 exp[a + 3] = 0;
 867                                 strcat(exp, buf);
 868                         }
 869                 }
 870                 if (!strncmp(&exp[a], "^r", 2)) {
 871                         strcpy(buf, exp);
 872                         strcpy(&exp[a], room_name);
 873                         strcat(exp, &buf[a + 2]);
 874                 }
 875                 if (!strncmp(&exp[a], "^c", 2)) {
 876                         exp[a] = ',';
 877                         strcpy(&exp[a + 1], &exp[a + 2]);
 878                 }
 879         }
 880
 881         return (exp);
 882 }
 883
 884
 885
 886 /*
 887  * Comparison function to determine if entered commands match a
 888  * command loaded from the config file.
 889  */
 890 int cmdmatch(char *cmdbuf, struct citcmd *cptr, int ncomp)
 891 {
 892         int a;
 893         int cmdax;
 894
 895         cmdax = 0;
 896         if (is_room_aide)
 897                 cmdax = 1;
 898         if (axlevel >= 6)
 899                 cmdax = 2;
 900
 901         for (a = 0; a < ncomp; ++a) {
 902                 if ((tolower(cmdbuf[a]) != keycmd(cptr->c_keys[a]))
 903                     || (cptr->c_axlevel > cmdax))
 904                         return (0);
 905         }
 906         return (1);
 907 }
 908
 909
 910 /*
 911  * This function returns 1 if a given command requires a string input
 912  */
 913 int requires_string(struct citcmd *cptr, int ncomp)
 914 {
 915         int a;
 916         char buf[64];
 917
 918         strcpy(buf, cptr->c_keys[ncomp - 1]);
 919         for (a = 0; a < strlen(buf); ++a) {
 920                 if (buf[a] == ':')
 921                         return (1);
 922         }
 923         return (0);
 924 }
 925
 926
 927 /*
 928  * Input a command at the main prompt.
 929  * This function returns an integer command number.  If the command prompts
 930  * for a string then it is placed in the supplied buffer.
 931  */
 932 int getcmd(char *argbuf)
 933 {
 934         char cmdbuf[5];
 935         int cmdspaces[5];
 936         int cmdpos;
 937         int ch;
 938         int a;
 939         int got;
 940         int this_lazy_cmd;
 941         struct citcmd *cptr;
 942
 943         /*
 944          * Starting a new command now, so set sigcaught to 0.  This variable
 945          * is set to nonzero (usually NEXT_KEY or STOP_KEY) if a command has
 946          * been interrupted by a keypress.
 947          */
 948         sigcaught = 0;
 949
 950         /* Switch color support on or off if we're in user mode */
 951         if (rc_ansi_color == 3) {
 952                 if (userflags & US_COLOR)
 953                         enable_color = 1;
 954                 else
 955                         enable_color = 0;
 956         }
 957         /* if we're running in idiot mode, display a cute little menu */
 958         IFNEXPERT formout("mainmenu");
 959
 960         print_express();        /* print express messages if there are any */
 961         strcpy(argbuf, "");
 962         cmdpos = 0;
 963         for (a = 0; a < 5; ++a)
 964                 cmdbuf[a] = 0;
 965         /* now the room prompt... */
 966         ok_to_interrupt = 1;
 967         color(BRIGHT_WHITE);
 968         printf("\n%s", room_name);
 969         color(DIM_WHITE);
 970         printf("%c ", room_prompt(room_flags));
 971         fflush(stdout);
 972
 973         while (1) {
 974                 ch = inkey();
 975                 ok_to_interrupt = 0;
 976
 977                 /* Handle the backspace key, but only if there's something
 978                  * to backspace over...
 979                  */
 980                 if ((ch == 8) && (cmdpos > 0)) {
 981                         back(cmdspaces[cmdpos - 1] + 1);
 982                         cmdbuf[cmdpos] = 0;
 983                         --cmdpos;
 984                 }
 985                 /* Spacebar invokes "lazy traversal" commands */
 986                 if ((ch == 32) && (cmdpos == 0)) {
 987                         this_lazy_cmd = next_lazy_cmd;
 988                         if (this_lazy_cmd == 13)
 989                                 next_lazy_cmd = 5;
 990                         if (this_lazy_cmd == 5)
 991                                 next_lazy_cmd = 13;
 992                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 993                                 if (cptr->c_cmdnum == this_lazy_cmd) {
 994                                         for (a = 0; a < 5; ++a)
 995                                                 if (cptr->c_keys[a][0] != 0)
 996                                                         printf("%s ", cmd_expand(
 997                                                                                         cptr->c_keys[a], 0));
 998                                         printf("\n");
 999                                         return (this_lazy_cmd);
1000                                 }
1001                         }
1002                         printf("\n");
1003                         return (this_lazy_cmd);
1004                 }
1005                 /* Otherwise, process the command */
1006                 cmdbuf[cmdpos] = tolower(ch);
1007
1008                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1009                         if (cmdmatch(cmdbuf, cptr, cmdpos + 1)) {
1010
1011                                 printf("%s", cmd_expand(cptr->c_keys[cmdpos], 0));
1012                                 cmdspaces[cmdpos] = strlen(
1013                                     cmd_expand(cptr->c_keys[cmdpos], 0));
1014                                 if (cmdpos < 4)
1015                                         if ((cptr->c_keys[cmdpos + 1]) != 0)
1016                                                 putc(' ', stdout);
1017                                 ++cmdpos;
1018                         }
1019                 }
1020
1021                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1022                         if (cmdmatch(cmdbuf, cptr, 5)) {
1023                                 /* We've found our command. */
1024                                 if (requires_string(cptr, cmdpos)) {
1025                                         getline(argbuf, 32);
1026                                 } else {
1027                                         printf("\n");
1028                                 }
1029
1030                                 /* If this command is one that changes rooms,
1031                                  * then the next lazy-command (space bar)
1032                                  * should be "read new" instead of "goto"
1033                                  */
1034                                 if ((cptr->c_cmdnum == 5)
1035                                     || (cptr->c_cmdnum == 6)
1036                                     || (cptr->c_cmdnum == 47)
1037                                     || (cptr->c_cmdnum == 52)
1038                                     || (cptr->c_cmdnum == 16)
1039                                     || (cptr->c_cmdnum == 20))
1040                                         next_lazy_cmd = 13;
1041
1042                                 return (cptr->c_cmdnum);
1043
1044                         }
1045                 }
1046
1047                 if (ch == '?') {
1048                         pprintf("\rOne of ...                         \n");
1049                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1050                                 if (cmdmatch(cmdbuf, cptr, cmdpos)) {
1051                                         for (a = 0; a < 5; ++a) {
1052                                                 pprintf("%s ", cmd_expand(cptr->c_keys[a], 1));
1053                                         }
1054                                         pprintf("\n");
1055                                 }
1056                         }
1057
1058                         pprintf("\n%s%c ", room_name, room_prompt(room_flags));
1059                         got = 0;
1060                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1061                                 if ((got == 0) && (cmdmatch(cmdbuf, cptr, cmdpos))) {
1062                                         for (a = 0; a < cmdpos; ++a) {
1063                                                 pprintf("%s ",
1064                                                        cmd_expand(cptr->c_keys[a], 0));
1065                                         }
1066                                         got = 1;
1067                                 }
1068                         }
1069                 }
1070         }
1071
1072 }
1073
1074
1075
1076
1077
1078 /*
1079  * set tty modes.  commands are:
1080  *
1081  * 01- set to bbs mode
1082  * 2 - save current settings for later restoral
1083  * 3 - restore saved settings
1084  */
1085 #ifdef HAVE_TERMIOS_H
1086 void sttybbs(int cmd)
1087 {                               /* SysV version of sttybbs() */
1088         struct termios live;
1089         static struct termios saved_settings;
1090         static int last_cmd = 0;
1091
1092         if (cmd == SB_LAST)
1093                 cmd = last_cmd;
1094         else
1095                 last_cmd = cmd;
1096
1097         if ((cmd == 0) || (cmd == 1)) {
1098                 tcgetattr(0, &live);
1099                 live.c_iflag = ISTRIP | IXON | IXANY;
1100                 live.c_oflag = OPOST | ONLCR;
1101                 live.c_lflag = ISIG | NOFLSH;
1102
1103                 live.c_cc[VINTR] = (-1);
1104                 live.c_cc[VQUIT] = (-1);
1105
1106 #ifdef hpux
1107                 live.c_cc[VMIN] = 0;
1108                 live.c_cc[VTIME] = 0;
1109 #endif
1110
1111                 /* do we even need this stuff anymore? */
1112                 /* live.c_line=0; */
1113                 live.c_cc[VERASE] = 8;
1114                 live.c_cc[VKILL] = 24;
1115                 live.c_cc[VEOF] = 1;
1116                 live.c_cc[VEOL] = 255;
1117                 live.c_cc[VEOL2] = 0;
1118                 live.c_cc[VSTART] = 0;
1119                 tcsetattr(0, TCSADRAIN, &live);
1120         }
1121         if (cmd == 2) {
1122                 tcgetattr(0, &saved_settings);
1123         }
1124         if (cmd == 3) {
1125                 tcsetattr(0, TCSADRAIN, &saved_settings);
1126         }
1127 }
1128 #else
1129 void sttybbs(int cmd)
1130 {                               /* BSD version of sttybbs() */
1131         struct sgttyb live;
1132         static struct sgttyb saved_settings;
1133
1134         if ((cmd == 0) || (cmd == 1)) {
1135                 gtty(0, &live);
1136                 live.sg_flags |= CBREAK;
1137                 live.sg_flags |= CRMOD;
1138                 live.sg_flags |= NL1;
1139                 live.sg_flags &= ~ECHO;
1140                 if (cmd == 1)
1141                         live.sg_flags |= NOFLSH;
1142                 stty(0, &live);
1143         }
1144         if (cmd == 2) {
1145                 gtty(0, &saved_settings);
1146         }
1147         if (cmd == 3) {
1148                 stty(0, &saved_settings);
1149         }
1150 }
1151 #endif
1152
1153
1154 /*
1155  * display_help()  -  help file viewer
1156  */
1157 void display_help(char *name)
1158 {
1159         formout(name);
1160 }
1161
1162
1163 /*
1164  * fmout()  -  Citadel text formatter and paginator
1165  */
1166 int fmout(
1167         int width,      /* screen width to use */
1168         FILE *fp,       /* file to read from, or NULL to read from server */
1169         char pagin,     /* nonzero if we should use the paginator */
1170         int height,     /* screen height to use */
1171         int starting_lp,/* starting value for lines_printed, -1 for global */
1172         char subst)     /* nonzero if we should use hypertext mode */
1173 {
1174         int a, b, c, d, old;
1175         int real = (-1);
1176         char aaa[140];
1177         char buffer[512];
1178         int eof_flag = 0;
1179
1180         num_urls = 0;   /* Start with a clean slate of embedded URL's */
1181
1182         if (starting_lp >= 0) {
1183                 lines_printed = starting_lp;
1184         }
1185         strcpy(aaa, "");
1186         old = 255;
1187         strcpy(buffer, "");
1188         c = 1;                  /* c is the current pos */
1189
1190 FMTA:   while ((eof_flag == 0) && (strlen(buffer) < 126)) {
1191                 if (fp != NULL) {       /* read from file */
1192                         if (feof(fp))
1193                                 eof_flag = 1;
1194                         if (eof_flag == 0) {
1195                                 a = getc(fp);
1196                                 buffer[strlen(buffer) + 1] = 0;
1197                                 buffer[strlen(buffer)] = a;
1198                         }
1199                 } else {        /* read from server */
1200                         d = strlen(buffer);
1201                         serv_gets(&buffer[d]);
1202                         while ((!isspace(buffer[d])) && (isspace(buffer[strlen(buffer) - 1])))
1203                                 buffer[strlen(buffer) - 1] = 0;
1204                         if (!strcmp(&buffer[d], "000")) {
1205                                 buffer[d] = 0;
1206                                 eof_flag = 1;
1207                                 while (isspace(buffer[strlen(buffer) - 1]))
1208                                         buffer[strlen(buffer) - 1] = 0;
1209                         }
1210                         d = strlen(buffer);
1211                         buffer[d] = 10;
1212                         buffer[d + 1] = 0;
1213                 }
1214         }
1215
1216         if ( (!strncasecmp(buffer, "http://", 7))
1217            || (!strncasecmp(buffer, "ftp://", 6)) ) {
1218                 safestrncpy(urls[num_urls], buffer, (SIZ-1));
1219                 for (a=0; a<strlen(urls[num_urls]); ++a) {
1220                         b = urls[num_urls][a];
1221                         if ( (b==' ') || (b==')') || (b=='>') || (b==10)
1222                            || (b==13) || (b==9) || (b=='\"') )
1223                                 urls[num_urls][a] = 0;
1224                 }
1225                 ++num_urls;
1226         }
1227
1228         buffer[strlen(buffer) + 1] = 0;
1229         a = buffer[0];
1230         strcpy(buffer, &buffer[1]);
1231
1232         old = real;
1233         real = a;
1234         if (a <= 0)
1235                 goto FMTEND;
1236
1237         if (((a == 13) || (a == 10)) && (old != 13) && (old != 10))
1238                 a = 32;
1239         if (((old == 13) || (old == 10)) && (isspace(real))) {
1240                 printf("\n");
1241                 ++lines_printed;
1242                 lines_printed = checkpagin(lines_printed, pagin, height);
1243                 c = 1;
1244         }
1245         if (a > 126)
1246                 goto FMTA;
1247
1248         if (a > 32) {
1249                 if (((strlen(aaa) + c) > (width - 5)) && (strlen(aaa) > (width - 5))) {
1250                         printf("\n%s", aaa);
1251                         c = strlen(aaa);
1252                         aaa[0] = 0;
1253                         ++lines_printed;
1254                         lines_printed = checkpagin(lines_printed, pagin, height);
1255                 }
1256                 b = strlen(aaa);
1257                 aaa[b] = a;
1258                 aaa[b + 1] = 0;
1259         }
1260         if (a == 32) {
1261                 if ((strlen(aaa) + c) > (width - 5)) {
1262                         c = 1;
1263                         printf("\n");
1264                         ++lines_printed;
1265                         lines_printed = checkpagin(lines_printed, pagin, height);
1266                 }
1267                 printf("%s ", aaa);
1268                 ++c;
1269                 c = c + strlen(aaa);
1270                 strcpy(aaa, "");
1271                 goto FMTA;
1272         }
1273         if ((a == 13) || (a == 10)) {
1274                 printf("%s\n", aaa);
1275                 c = 1;
1276                 ++lines_printed;
1277                 lines_printed = checkpagin(lines_printed, pagin, height);
1278                 if (sigcaught) goto OOPS;
1279                 strcpy(aaa, "");
1280                 goto FMTA;
1281         }
1282         goto FMTA;
1283
1284         /* keypress caught; drain the server */
1285 OOPS:   do {
1286                 serv_gets(aaa);
1287         } while (strcmp(aaa, "000"));
1288
1289 FMTEND: printf("\n");
1290         ++lines_printed;
1291         lines_printed = checkpagin(lines_printed, pagin, height);
1292         return (sigcaught);
1293 }
1294
1295
1296 /*
1297  * support ANSI color if defined
1298  */
1299 void color(int colornum)
1300 {
1301         static int is_bold = 0;
1302         static int hold_color, current_color;
1303
1304         if (colornum == COLOR_PUSH) {
1305                 hold_color = current_color;
1306                 return;
1307         }
1308
1309         if (colornum == COLOR_POP) {
1310                 color(hold_color);
1311                 return;
1312         }
1313
1314         current_color = colornum;
1315         if (enable_color) {
1316                 /* When switching to dim white, actually output an 'original
1317                  * pair' sequence -- this looks better on black-on-white
1318                  * terminals.
1319                  */
1320                 if (colornum == DIM_WHITE)
1321                         printf("\033[39;49m");
1322                 else
1323                         printf("\033[3%d;40m", (colornum & 7));
1324
1325                 if ((colornum >= 8) && (is_bold == 0)) {
1326                         printf("\033[1m");
1327                         is_bold = 1;
1328                 } else if ((colornum < 8) && (is_bold == 1)) {
1329                         printf("\033[0m");
1330                         is_bold = 0;
1331                 }
1332                 fflush(stdout);
1333         }
1334 }
1335
1336 void cls(int colornum)
1337 {
1338         if (enable_color) {
1339                 printf("\033[4%dm\033[2J\033[H\033[0m", colornum);
1340                 fflush(stdout);
1341         }
1342 }
1343
1344
1345 /*
1346  * Detect whether ANSI color is available (answerback)
1347  */
1348 void send_ansi_detect(void)
1349 {
1350         if (rc_ansi_color == 2) {
1351                 printf("\033[c");
1352                 fflush(stdout);
1353                 time(&AnsiDetect);
1354         }
1355 }
1356
1357 void look_for_ansi(void)
1358 {
1359         fd_set rfds;
1360         struct timeval tv;
1361         char abuf[512];
1362         time_t now;
1363         int a;
1364
1365         if (rc_ansi_color == 0) {
1366                 enable_color = 0;
1367         } else if (rc_ansi_color == 1) {
1368                 enable_color = 1;
1369         } else if (rc_ansi_color == 2) {
1370
1371                 /* otherwise, do the auto-detect */
1372
1373                 strcpy(abuf, "");
1374
1375                 time(&now);
1376                 if ((now - AnsiDetect) < 2)
1377                         sleep(1);
1378
1379                 do {
1380                         FD_ZERO(&rfds);
1381                         FD_SET(0, &rfds);
1382                         tv.tv_sec = 0;
1383                         tv.tv_usec = 1;
1384
1385                         select(1, &rfds, NULL, NULL, &tv);
1386                         if (FD_ISSET(0, &rfds)) {
1387                                 abuf[strlen(abuf) + 1] = 0;
1388                                 read(0, &abuf[strlen(abuf)], 1);
1389                         }
1390                 } while (FD_ISSET(0, &rfds));
1391
1392                 for (a = 0; a < strlen(abuf); ++a) {
1393                         if ((abuf[a] == 27) && (abuf[a + 1] == '[')
1394                             && (abuf[a + 2] == '?')) {
1395                                 enable_color = 1;
1396                         }
1397                 }
1398         }
1399 }
1400
1401
1402 /*
1403  * Display key options (highlight hotkeys inside angle brackets)
1404  */
1405 void keyopt(char *buf) {
1406         int i;
1407
1408         color(DIM_WHITE);
1409         for (i=0; i<strlen(buf); ++i) {
1410                 if (buf[i]=='<') {
1411                         putc(buf[i], stdout);
1412                         color(BRIGHT_MAGENTA);
1413                 } else {
1414                         if (buf[i]=='>') {
1415                                 color(DIM_WHITE);
1416                         }
1417                         putc(buf[i], stdout);
1418                 }
1419         }
1420         color(DIM_WHITE);
1421 }
1422
1423
1424
1425 /*
1426  * Present a key-menu line choice type of thing
1427  */
1428 char keymenu(char *menuprompt, char *menustring) {
1429         int i, c, a;
1430         int choices;
1431         int do_prompt = 0;
1432         char buf[1024];
1433         int ch;
1434         int display_prompt = 1;
1435
1436         choices = num_tokens(menustring, '|');
1437
1438         if (menuprompt != NULL) do_prompt = 1;
1439         if (menuprompt != NULL) if (strlen(menuprompt)==0) do_prompt = 0;
1440
1441         while (1) {
1442                 if (display_prompt) {
1443                         if (do_prompt) {
1444                                 printf("%s ", menuprompt);
1445                         }
1446                         else {
1447                                 for (i=0; i<choices; ++i) {
1448                                         extract(buf, menustring, i);
1449                                         keyopt(buf);
1450                                         printf(" ");
1451                                 }
1452                         }
1453                         printf(" -> ");
1454                         display_prompt = 0;
1455                 }
1456                 ch = lkey();
1457
1458                 if ( (do_prompt) && (ch=='?') ) {
1459                         printf("\rOne of...                               ");
1460                         printf("                                      \n");
1461                         for (i=0; i<choices; ++i) {
1462                                 extract(buf, menustring, i);
1463                                 printf("   ");
1464                                 keyopt(buf);
1465                                 printf("\n");
1466                         }
1467                         printf("\n");
1468                         display_prompt = 1;
1469                 }
1470
1471                 for (i=0; i<choices; ++i) {
1472                         extract(buf, menustring, i);
1473                         for (c=1; c<strlen(buf); ++c) {
1474                                 if ( (ch == tolower(buf[c]))
1475                                    && (buf[c-1]=='<')
1476                                    && (buf[c+1]=='>') ) {
1477                                         for (a=0; a<strlen(buf); ++a) {
1478                                                 if ( (a!=(c-1)) && (a!=(c+1))) {
1479                                                         putc(buf[a], stdout);
1480                                                 }
1481                                         }
1482                                         printf("\n\n");
1483                                         return ch;
1484                                 }
1485                         }
1486                 }
1487         }
1488 }