textclient/src/commands.c

   1 /*
   2  * This file contains functions which implement parts of the
   3  * text-mode user interface.
   4  *
   5  * Copyright (c) 1987-2017 by the citadel.org team
   6  *
   7  * This program is open source software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 3.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #include "sysdep.h"
  17 #include <stdlib.h>
  18 #include <unistd.h>
  19 #include <stdio.h>
  20 #include <fcntl.h>
  21 #include <ctype.h>
  22 #include <string.h>
  23 #include <sys/types.h>
  24
  25 #if TIME_WITH_SYS_TIME
  26 # include <sys/time.h>
  27 # include <time.h>
  28 #else
  29 # if HAVE_SYS_TIME_H
  30 #  include <sys/time.h>
  31 # else
  32 #  include <time.h>
  33 # endif
  34 #endif
  35
  36 #ifdef HAVE_TERMIOS_H
  37 #include <termios.h>
  38 #else
  39 #include <sgtty.h>
  40 #endif
  41
  42 #ifdef HAVE_SYS_SELECT_H
  43 #include <sys/select.h>
  44 #endif
  45
  46 #ifdef THREADED_CLIENT
  47 #include <pthread.h>
  48 #endif
  49
  50 #include <signal.h>
  51 #include <errno.h>
  52 #include <stdarg.h>
  53 #include <libcitadel.h>
  54 #include "citadel_ipc.h"
  55 #include "commands.h"
  56 #include "messages.h"
  57 #include "citadel_decls.h"
  58 #include "routines.h"
  59 #include "routines2.h"
  60 #include "rooms.h"
  61 #include "client_chat.h"
  62 #include "help.h"
  63 #include "tuiconfig.h"
  64 #include "screen.h"
  65 #include "ecrash.h"
  66
  67 struct citcmd {
  68         struct citcmd *next;
  69         int c_cmdnum;
  70         int c_axlevel;
  71         char c_keys[5][64];
  72 };
  73
  74 #define IFNEXPERT if ((userflags&US_EXPERT)==0)
  75
  76
  77 int rc_exp_beep;
  78 char rc_exp_cmd[1024];
  79 int rc_allow_attachments;
  80 int rc_display_message_numbers;
  81 int rc_force_mail_prompts;
  82 int rc_remember_passwords;
  83 int rc_ansi_color;
  84 int rc_color_use_bg;
  85 int rc_prompt_control = 0;
  86 time_t rc_idle_threshold = (time_t)900;
  87 char rc_url_cmd[SIZ];
  88 char rc_open_cmd[SIZ];
  89 char rc_gotmail_cmd[SIZ];
  90
  91 int next_lazy_cmd = 5;
  92
  93 extern int screenwidth, screenheight;
  94 extern int termn8;
  95 extern CtdlIPC *ipc_for_signal_handlers;        /* KLUDGE cover your eyes */
  96
  97 struct citcmd *cmdlist = NULL;
  98
  99
 100 /* these variables are local to this module */
 101 char keepalives_enabled = KA_YES;       /* send NOOPs to server when idle */
 102 int ok_to_interrupt = 0;                /* print instant msgs asynchronously */
 103 time_t AnsiDetect;                      /* when did we send the detect code? */
 104 int enable_color = 0;                   /* nonzero for ANSI color */
 105
 106
 107
 108
 109 /*
 110  * If an interesting key has been pressed, return its value, otherwise 0
 111  */
 112 char was_a_key_pressed(void) {
 113         fd_set rfds;
 114         struct timeval tv;
 115         int the_character;
 116         int retval;
 117
 118         FD_ZERO(&rfds);
 119         FD_SET(0, &rfds);
 120         tv.tv_sec = 0;
 121         tv.tv_usec = 0;
 122         retval = select(1, &rfds, NULL, NULL, &tv);
 123
 124         /* Careful!  Disable keepalives during keyboard polling; we're probably
 125          * in the middle of a data transfer from the server, in which case
 126          * sending a NOOP would throw the client protocol out of sync.
 127          */
 128         if ((retval > 0) && FD_ISSET(0, &rfds)) {
 129                 set_keepalives(KA_NO);
 130                 the_character = inkey();
 131                 set_keepalives(KA_YES);
 132         }
 133         else {
 134                 the_character = 0;
 135         }
 136         return(the_character);
 137 }
 138
 139
 140
 141
 142
 143 /*
 144  * print_instant()  -  print instant messages if there are any
 145  */
 146 void print_instant(void)
 147 {
 148         char buf[1024];
 149         FILE *outpipe;
 150         time_t timestamp;
 151         struct tm stamp;
 152         int flags = 0;
 153         char sender[64];
 154         char node[64];
 155         char *listing = NULL;
 156         int r;                  /* IPC result code */
 157
 158         if (instant_msgs == 0)
 159                 return;
 160
 161         if (rc_exp_beep) {
 162                 ctdl_beep();
 163         }
 164         if (IsEmptyStr(rc_exp_cmd)) {
 165                 color(BRIGHT_RED);
 166                 scr_printf("\r---");
 167         }
 168
 169         while (instant_msgs != 0) {
 170                 r = CtdlIPCGetInstantMessage(ipc_for_signal_handlers, &listing, buf);
 171                 if (r / 100 != 1)
 172                         return;
 173
 174                 instant_msgs = extract_int(buf, 0);
 175                 timestamp = extract_long(buf, 1);
 176                 flags = extract_int(buf, 2);
 177                 extract_token(sender, buf, 3, '|', sizeof sender);
 178                 extract_token(node, buf, 4, '|', sizeof node);
 179                 strcpy(last_paged, sender);
 180
 181                 localtime_r(&timestamp, &stamp);
 182
 183                 /* If the page is a Logoff Request, honor it. */
 184                 if (flags & 2) {
 185                         termn8 = 1;
 186                         return;
 187                 }
 188
 189                 if (!IsEmptyStr(rc_exp_cmd)) {
 190                         outpipe = popen(rc_exp_cmd, "w");
 191                         if (outpipe != NULL) {
 192                                 /* Header derived from flags */
 193                                 if (flags & 2)
 194                                         fprintf(outpipe,
 195                                                "Please log off now, as requested ");
 196                                 else if (flags & 1)
 197                                         fprintf(outpipe, "Broadcast message ");
 198                                 else if (flags & 4)
 199                                         fprintf(outpipe, "Chat request ");
 200                                 else
 201                                         fprintf(outpipe, "Message ");
 202                                 /* Timestamp.  Can this be improved? */
 203                                 if (stamp.tm_hour == 0 || stamp.tm_hour == 12)
 204                                         fprintf(outpipe, "at 12:%02d%cm",
 205                                                 stamp.tm_min,
 206                                                 stamp.tm_hour ? 'p' : 'a');
 207                                 else if (stamp.tm_hour > 12)            /* pm */
 208                                         fprintf(outpipe, "at %d:%02dpm",
 209                                                 stamp.tm_hour - 12,
 210                                                 stamp.tm_min);
 211                                 else                                    /* am */
 212                                         fprintf(outpipe, "at %d:%02dam",
 213                                                 stamp.tm_hour, stamp.tm_min);
 214                                 fprintf(outpipe, " from %s", sender);
 215                                 if (strncmp(ipc_for_signal_handlers->ServInfo.nodename, node, 32))
 216                                         fprintf(outpipe, " @%s", node);
 217                                 fprintf(outpipe, ":\n%s\n", listing);
 218                                 pclose(outpipe);
 219                                 if (instant_msgs == 0)
 220                                         return;
 221                                 continue;
 222                         }
 223                 }
 224                 /* fall back to built-in instant message display */
 225                 scr_printf("\n");
 226
 227                 /* Header derived from flags */
 228                 if (flags & 2)
 229                         scr_printf("Please log off now, as requested ");
 230                 else if (flags & 1)
 231                         scr_printf("Broadcast message ");
 232                 else if (flags & 4)
 233                         scr_printf("Chat request ");
 234                 else
 235                         scr_printf("Message ");
 236
 237                 /* Timestamp.  Can this be improved? */
 238                 if (stamp.tm_hour == 0 || stamp.tm_hour == 12)/* 12am/12pm */
 239                         scr_printf("at 12:%02d%cm", stamp.tm_min,
 240                                 stamp.tm_hour ? 'p' : 'a');
 241                 else if (stamp.tm_hour > 12)                    /* pm */
 242                         scr_printf("at %d:%02dpm",
 243                                 stamp.tm_hour - 12, stamp.tm_min);
 244                 else                                            /* am */
 245                         scr_printf("at %d:%02dam", stamp.tm_hour, stamp.tm_min);
 246
 247                 /* Sender */
 248                 scr_printf(" from %s", sender);
 249
 250                 /* Remote node, if any */
 251                 if (strncmp(ipc_for_signal_handlers->ServInfo.nodename, node, 32))
 252                         scr_printf(" @%s", node);
 253
 254                 scr_printf(":\n");
 255                 fmout(screenwidth, NULL, listing, NULL, 0);
 256                 free(listing);
 257
 258         }
 259         scr_printf("\n---\n");
 260         color(BRIGHT_WHITE);
 261
 262
 263 }
 264
 265
 266 void set_keepalives(int s)
 267 {
 268         keepalives_enabled = (char) s;
 269 }
 270
 271 /*
 272  * This loop handles the "keepalive" messages sent to the server when idling.
 273  */
 274
 275 static time_t idlet = 0;
 276 static void really_do_keepalive(void) {
 277
 278         time(&idlet);
 279
 280         /* This may sometimes get called before we are actually connected
 281          * to the server.  Don't do anything if we aren't connected. -IO
 282          */
 283         if (!ipc_for_signal_handlers)
 284                 return;
 285
 286         /* If full keepalives are enabled, send a NOOP to the server and
 287          * wait for a response.
 288          */
 289         if (keepalives_enabled == KA_YES) {
 290                 CtdlIPCNoop(ipc_for_signal_handlers);
 291                 if (instant_msgs > 0) {
 292                         if (ok_to_interrupt == 1) {
 293                                 scr_printf("\r%64s\r", "");
 294                                 print_instant();
 295                                 scr_printf("%s%c ", room_name,
 296                                        room_prompt(room_flags));
 297                                 scr_flush();
 298                         }
 299                 }
 300         }
 301
 302         /* If half keepalives are enabled, send a QNOP to the server (if the
 303          * server supports it) and then do nothing.
 304          */
 305         if ( (keepalives_enabled == KA_HALF)
 306            && (ipc_for_signal_handlers->ServInfo.supports_qnop > 0) ) {
 307                 CtdlIPC_chat_send(ipc_for_signal_handlers, "QNOP");
 308         }
 309 }
 310
 311 /*
 312  * threaded nonblocking keepalive stuff starts here. I'm going for a simple
 313  * encapsulated interface; in theory there should be no need to touch these
 314  * globals outside of the async_ka_* functions.
 315  */
 316
 317 #ifdef THREADED_CLIENT
 318 static pthread_t ka_thr_handle;
 319 static int ka_thr_active = 0;
 320 static int async_ka_enabled = 0;
 321
 322 static void *ka_thread(void *arg)
 323 {
 324 #ifdef HAVE_BACKTRACE
 325         char threadName[256];
 326
 327         // Set up our name
 328         sprintf(threadName, "ka_Thread n");
 329
 330         // Register for tracing
 331         eCrash_RegisterThread(threadName, 0);
 332 #endif
 333         really_do_keepalive();
 334         pthread_detach(ka_thr_handle);
 335         ka_thr_active = 0;
 336
 337 #ifdef HAVE_BACKTRACE
 338         eCrash_UnregisterThread();
 339 #endif
 340         return NULL;
 341 }
 342
 343 /* start up a thread to handle a keepalive in the background */
 344 static void async_ka_exec(void)
 345 {
 346         if (!ka_thr_active) {
 347                 ka_thr_active = 1;
 348                 if (pthread_create(&ka_thr_handle, NULL, ka_thread, NULL)) {
 349                         perror("pthread_create");
 350                         exit(1);
 351                 }
 352         }
 353 }
 354 #endif /* THREADED_CLIENT */
 355
 356 /* I changed this from static to not because I need to call it from
 357  * screen.c, either that or make something in screen.c not static.
 358  * Fix it how you like. Why all the staticness? stu
 359  */
 360 void do_keepalive(void)
 361 {
 362         time_t now;
 363
 364         time(&now);
 365         if ((now - idlet) < ((long) S_KEEPALIVE))
 366                 return;
 367
 368         /* Do a space-backspace to keep telnet sessions from idling out */
 369         scr_printf(" %c", 8);
 370         scr_flush();
 371
 372 #ifdef THREADED_CLIENT
 373         if (async_ka_enabled)
 374                 async_ka_exec();
 375         else
 376 #endif
 377                 really_do_keepalive();
 378 }
 379
 380
 381 /* Now the actual async-keepalve API that we expose to higher levels:
 382  * async_ka_start() and async_ka_end(). These do nothing when we don't have
 383  * threading enabled, so we avoid sprinkling ifdef's throughout the code.
 384  */
 385
 386 /* wait for a background keepalive to complete. this must be done before
 387  * attempting any further server requests!
 388  */
 389 void async_ka_end(void)
 390 {
 391 #ifdef THREADED_CLIENT
 392         if (ka_thr_active)
 393                 pthread_join(ka_thr_handle, NULL);
 394
 395         async_ka_enabled--;
 396 #endif
 397 }
 398
 399 /* tell do_keepalive() that keepalives are asynchronous. */
 400 void async_ka_start(void)
 401 {
 402 #ifdef THREADED_CLIENT
 403         async_ka_enabled++;
 404 #endif
 405 }
 406
 407
 408 int inkey(void)
 409 {                               /* get a character from the keyboard, with   */
 410         int a;                  /* the watchdog timer in effect if necessary */
 411         fd_set rfds;
 412         struct timeval tv;
 413         time_t start_time;
 414
 415         scr_flush();
 416         time(&start_time);
 417
 418         do {
 419                 /* This loop waits for keyboard input.  If the keepalive
 420                  * timer expires, it sends a keepalive to the server if
 421                  * necessary and then waits again.
 422                  */
 423                 do {
 424                         do_keepalive();
 425
 426                         FD_ZERO(&rfds);
 427                         FD_SET(0, &rfds);
 428                         tv.tv_sec = S_KEEPALIVE;
 429                         tv.tv_usec = 0;
 430
 431                         select(1, &rfds, NULL, NULL, &tv);
 432                 } while (!FD_ISSET(0, &rfds));
 433
 434                 /* At this point, there's input, so fetch it.
 435                  * (There's a hole in the bucket...)
 436                  */
 437                 a = scr_getc(SCR_BLOCK);
 438                 if (a == 127) {
 439                         a = 8;
 440                 }
 441                 if (a == 13) {
 442                         a = 10;
 443                 }
 444         } while (a == 0);
 445         return (a);
 446 }
 447
 448
 449 int yesno(void)
 450 {                               /* Returns 1 for yes, 0 for no */
 451         int a;
 452         while (1) {
 453                 a = inkey();
 454                 a = tolower(a);
 455                 if (a == 'y') {
 456                         scr_printf("Yes\n");
 457                         return (1);
 458                 }
 459                 if (a == 'n') {
 460                         scr_printf("No\n");
 461                         return (0);
 462                 }
 463         }
 464 }
 465
 466 /* Returns 1 for yes, 0 for no, arg is default value */
 467 int yesno_d(int d)
 468 {
 469         int a;
 470         while (1) {
 471                 a = inkey();
 472                 a = tolower(a);
 473                 if (a == 10)
 474                         a = (d ? 'y' : 'n');
 475                 if (a == 'y') {
 476                         scr_printf("Yes\n");
 477                         return (1);
 478                 }
 479                 if (a == 'n') {
 480                         scr_printf("No\n");
 481                         return (0);
 482                 }
 483         }
 484 }
 485
 486
 487
 488
 489 /*
 490  * Function to read a line of text from the terminal.
 491  *
 492  * string               Pointer to string buffer
 493  * lim                  Maximum length
 494  * noshow               Echo asterisks instead of keystrokes?
 495  * bs                   Allow backspacing out of the prompt? (returns -1 if this happens)
 496  *
 497  * returns: string length
 498  */
 499 int ctdl_getline(char *string, int lim, int noshow, int bs)
 500 {
 501         int pos = strlen(string);
 502         int ch;
 503
 504         async_ka_start();
 505         if (noshow && !IsEmptyStr(string)) {
 506                 int num_stars = strlen(string);
 507                 while (num_stars--) {
 508                         scr_putc('*');
 509                 }
 510         }
 511         else {
 512                 scr_printf("%s", string);
 513         }
 514
 515         while(1) {
 516                 ch = inkey();
 517
 518                 if ((ch == 8)  && (pos > 0)) {                          /* backspace */
 519                         --pos;
 520                         scr_putc(8); scr_putc(32); scr_putc(8);
 521                 }
 522
 523                 else if ((ch == 8) && (pos == 0) && (bs)) {             /* backspace out of the prompt */
 524                         async_ka_end();
 525                         return(-1);
 526                 }
 527
 528                 else if ((ch == 23) && (pos > 0)) {                     /* Ctrl-W deletes a word */
 529                         while ((pos > 0) && !isspace(string[pos])) {
 530                                 --pos;
 531                                 scr_putc(8); scr_putc(32); scr_putc(8);
 532                         }
 533                         while ((pos > 0) && !isspace(string[pos-1])) {
 534                                 --pos;
 535                                 scr_putc(8); scr_putc(32); scr_putc(8);
 536                         }
 537                 }
 538
 539                 else if (ch == 10) {                                    /* return */
 540                         string[pos] = 0;
 541                         scr_printf("\n");
 542                         async_ka_end();
 543                         return(pos);
 544                 }
 545
 546                 else if (isprint(ch)) {                                 /* payload characters */
 547                         scr_putc((noshow ? '*' : ch));
 548                         string[pos] = ch;
 549                         ++pos;
 550                 }
 551         }
 552 }
 553
 554
 555 /*
 556  * newprompt()          prompt for a string, print the existing value, and
 557  *                      allow the user to press return to keep it...
 558  *                      If len is negative, pass the "noshow" flag to ctdl_getline()
 559  */
 560 void strprompt(char *prompt, char *str, int len)
 561 {
 562         print_instant();
 563         color(DIM_WHITE);
 564         scr_printf("%s", prompt);
 565         color(DIM_WHITE);
 566         scr_printf(": ");
 567         color(BRIGHT_CYAN);
 568         ctdl_getline(str, abs(len), (len<0), 0);
 569         color(DIM_WHITE);
 570 }
 571
 572 /*
 573  * boolprompt()  -  prompt for a yes/no, print the existing value and
 574  *                  allow the user to press return to keep it...
 575  */
 576 int boolprompt(char *prompt, int prev_val)
 577 {
 578         int r;
 579
 580         color(DIM_WHITE);
 581         scr_printf("%s ", prompt);
 582         color(DIM_MAGENTA);
 583         scr_printf("[");
 584         color(BRIGHT_MAGENTA);
 585         scr_printf("%s", (prev_val ? "Yes" : "No"));
 586         color(DIM_MAGENTA);
 587         scr_printf("]: ");
 588         color(BRIGHT_CYAN);
 589         r = (yesno_d(prev_val));
 590         color(DIM_WHITE);
 591         return r;
 592 }
 593
 594 /*
 595  * intprompt()  -  like strprompt(), except for an integer
 596  *                 (note that it RETURNS the new value!)
 597  */
 598 int intprompt(char *prompt, int ival, int imin, int imax)
 599 {
 600         char buf[16];
 601         int i;
 602         int p;
 603
 604         do {
 605                 i = ival;
 606                 snprintf(buf, sizeof buf, "%d", i);
 607                 strprompt(prompt, buf, 15);
 608                 i = atoi(buf);
 609                 for (p=0; !IsEmptyStr(&buf[p]); ++p) {
 610                         if ( (!isdigit(buf[p]))
 611                            && ( (buf[p]!='-') || (p!=0) )  )
 612                                 i = imin - 1;
 613                 }
 614                 if (i < imin)
 615                         scr_printf("*** Must be no less than %d.\n", imin);
 616                 if (i > imax)
 617                         scr_printf("*** Must be no more than %d.\n", imax);
 618         } while ((i < imin) || (i > imax));
 619         return (i);
 620 }
 621
 622 /*
 623  * newprompt()          prompt for a string with no existing value
 624  *                      (clears out string buffer first)
 625  *                      If len is negative, pass the "noshow" flag to ctdl_getline()
 626  */
 627 void newprompt(char *prompt, char *str, int len)
 628 {
 629         str[0] = 0;
 630         color(BRIGHT_MAGENTA);
 631         scr_printf("%s", prompt);
 632         color(DIM_MAGENTA);
 633         ctdl_getline(str, abs(len), (len<0), 0);
 634         color(DIM_WHITE);
 635 }
 636
 637
 638 int lkey(void)
 639 {                               /* returns a lower case value */
 640         int a;
 641         a = inkey();
 642         if (isupper(a))
 643                 a = tolower(a);
 644         return (a);
 645 }
 646
 647 /*
 648  * parse the citadel.rc file
 649  */
 650 void load_command_set(void)
 651 {
 652         FILE *ccfile;
 653         char buf[1024];
 654         struct citcmd *cptr;
 655         struct citcmd *lastcmd = NULL;
 656         int a, d;
 657         int b = 0;
 658
 659         /* first, set up some defaults for non-required variables */
 660
 661         strcpy(editor_path, "");
 662         strcpy(printcmd, "");
 663         strcpy(imagecmd, "");
 664         strcpy(rc_username, "");
 665         strcpy(rc_password, "");
 666         rc_floor_mode = 0;
 667         rc_exp_beep = 1;
 668         rc_allow_attachments = 0;
 669         rc_remember_passwords = 0;
 670         strcpy(rc_exp_cmd, "");
 671         rc_display_message_numbers = 0;
 672         rc_force_mail_prompts = 0;
 673         rc_ansi_color = 0;
 674         rc_color_use_bg = 0;
 675         strcpy(rc_url_cmd, "");
 676         strcpy(rc_open_cmd, "");
 677         strcpy(rc_gotmail_cmd, "");
 678 #ifdef HAVE_OPENSSL
 679         rc_encrypt = RC_DEFAULT;
 680 #endif
 681
 682         /* now try to open the citadel.rc file */
 683
 684         ccfile = NULL;
 685         if (getenv("HOME") != NULL) {
 686                 snprintf(buf, sizeof buf, "%s/.citadelrc", getenv("HOME"));
 687                 ccfile = fopen(buf, "r");
 688         }
 689         if (ccfile == NULL) {
 690                 ccfile = fopen(file_citadel_rc, "r");
 691         }
 692         if (ccfile == NULL) {
 693                 ccfile = fopen("/etc/citadel.rc", "r");
 694         }
 695         if (ccfile == NULL) {
 696                 ccfile = fopen("./citadel.rc", "r");
 697         }
 698         if (ccfile == NULL) {
 699                 perror("commands: cannot open citadel.rc");
 700                 logoff(NULL, 3);
 701         }
 702         while (fgets(buf, sizeof buf, ccfile) != NULL) {
 703                 while ((!IsEmptyStr(buf)) ? (isspace(buf[strlen(buf) - 1])) : 0)
 704                         buf[strlen(buf) - 1] = 0;
 705
 706                 if (!strncasecmp(buf, "encrypt=", 8)) {
 707                         if (!strcasecmp(&buf[8], "yes")) {
 708 #ifdef HAVE_OPENSSL
 709                                 rc_encrypt = RC_YES;
 710 #else
 711                                 fprintf(stderr, "citadel.rc requires encryption support but citadel is not compiled with OpenSSL");
 712                                 logoff(NULL, 3);
 713 #endif
 714                         }
 715 #ifdef HAVE_OPENSSL
 716                         else if (!strcasecmp(&buf[8], "no")) {
 717                                 rc_encrypt = RC_NO;
 718                         }
 719                         else if (!strcasecmp(&buf[8], "default")) {
 720                                 rc_encrypt = RC_DEFAULT;
 721                         }
 722 #endif
 723                 }
 724
 725                 if (!strncasecmp(buf, "editor=", 7)) {
 726                         strcpy(editor_path, &buf[7]);
 727                 }
 728
 729                 if (!strncasecmp(buf, "printcmd=", 9))
 730                         strcpy(printcmd, &buf[9]);
 731
 732                 if (!strncasecmp(buf, "imagecmd=", 9))
 733                         strcpy(imagecmd, &buf[9]);
 734
 735                 if (!strncasecmp(buf, "expcmd=", 7))
 736                         strcpy(rc_exp_cmd, &buf[7]);
 737
 738                 if (!strncasecmp(buf, "use_floors=", 11)) {
 739                         if (!strcasecmp(&buf[11], "yes"))
 740                                 rc_floor_mode = RC_YES;
 741                         if (!strcasecmp(&buf[11], "no"))
 742                                 rc_floor_mode = RC_NO;
 743                         if (!strcasecmp(&buf[11], "default"))
 744                                 rc_floor_mode = RC_DEFAULT;
 745                 }
 746                 if (!strncasecmp(buf, "beep=", 5)) {
 747                         rc_exp_beep = atoi(&buf[5]);
 748                 }
 749                 if (!strncasecmp(buf, "allow_attachments=", 18)) {
 750                         rc_allow_attachments = atoi(&buf[18]);
 751                 }
 752                 if (!strncasecmp(buf, "idle_threshold=", 15)) {
 753                         rc_idle_threshold = atol(&buf[15]);
 754                 }
 755                 if (!strncasecmp(buf, "remember_passwords=", 19)) {
 756                         rc_remember_passwords = atoi(&buf[19]);
 757                 }
 758                 if (!strncasecmp(buf, "display_message_numbers=", 24)) {
 759                         rc_display_message_numbers = atoi(&buf[24]);
 760                 }
 761                 if (!strncasecmp(buf, "force_mail_prompts=", 19)) {
 762                         rc_force_mail_prompts = atoi(&buf[19]);
 763                 }
 764                 if (!strncasecmp(buf, "ansi_color=", 11)) {
 765                         if (!strncasecmp(&buf[11], "on", 2))
 766                                 rc_ansi_color = 1;
 767                         if (!strncasecmp(&buf[11], "auto", 4))
 768                                 rc_ansi_color = 2;      /* autodetect */
 769                         if (!strncasecmp(&buf[11], "user", 4))
 770                                 rc_ansi_color = 3;      /* user config */
 771                 }
 772                 if (!strncasecmp(buf, "status_line=", 12)) {
 773                         if (!strncasecmp(&buf[12], "on", 2))
 774                                 enable_status_line = 1;
 775                 }
 776                 if (!strncasecmp(buf, "use_background=", 15)) {
 777                         if (!strncasecmp(&buf[15], "on", 2))
 778                                 rc_color_use_bg = 9;
 779                 }
 780                 if (!strncasecmp(buf, "prompt_control=", 15)) {
 781                         if (!strncasecmp(&buf[15], "on", 2))
 782                                 rc_prompt_control = 1;
 783                         if (!strncasecmp(&buf[15], "user", 4))
 784                                 rc_prompt_control = 3;  /* user config */
 785                 }
 786                 if (!strncasecmp(buf, "username=", 9))
 787                         strcpy(rc_username, &buf[9]);
 788
 789                 if (!strncasecmp(buf, "password=", 9))
 790                         strcpy(rc_password, &buf[9]);
 791
 792                 if (!strncasecmp(buf, "urlcmd=", 7))
 793                         strcpy(rc_url_cmd, &buf[7]);
 794
 795                 if (!strncasecmp(buf, "opencmd=", 7))
 796                         strcpy(rc_open_cmd, &buf[8]);
 797
 798                 if (!strncasecmp(buf, "gotmailcmd=", 11))
 799                         strcpy(rc_gotmail_cmd, &buf[11]);
 800
 801                 if (!strncasecmp(buf, "cmd=", 4)) {
 802                         strcpy(buf, &buf[4]);
 803
 804                         cptr = (struct citcmd *) malloc(sizeof(struct citcmd));
 805
 806                         cptr->c_cmdnum = atoi(buf);
 807                         for (d = strlen(buf); d >= 0; --d)
 808                                 if (buf[d] == ',')
 809                                         b = d;
 810                         strcpy(buf, &buf[b + 1]);
 811
 812                         cptr->c_axlevel = atoi(buf);
 813                         for (d = strlen(buf); d >= 0; --d)
 814                                 if (buf[d] == ',')
 815                                         b = d;
 816                         strcpy(buf, &buf[b + 1]);
 817
 818                         for (a = 0; a < 5; ++a)
 819                                 cptr->c_keys[a][0] = 0;
 820
 821                         a = 0;
 822                         b = 0;
 823                         buf[strlen(buf) + 1] = 0;
 824                         while (!IsEmptyStr(buf)) {
 825                                 b = strlen(buf);
 826                                 for (d = strlen(buf); d >= 0; --d)
 827                                         if (buf[d] == ',')
 828                                                 b = d;
 829                                 strncpy(cptr->c_keys[a], buf, b);
 830                                 cptr->c_keys[a][b] = 0;
 831                                 if (buf[b] == ',')
 832                                         strcpy(buf, &buf[b + 1]);
 833                                 else
 834                                         strcpy(buf, "");
 835                                 ++a;
 836                         }
 837
 838                         cptr->next = NULL;
 839                         if (cmdlist == NULL)
 840                                 cmdlist = cptr;
 841                         else
 842                                 lastcmd->next = cptr;
 843                         lastcmd = cptr;
 844                 }
 845         }
 846         fclose(ccfile);
 847 }
 848
 849
 850
 851 /*
 852  * return the key associated with a command
 853  */
 854 char keycmd(char *cmdstr)
 855 {
 856         int a;
 857
 858         for (a = 0; !IsEmptyStr(&cmdstr[a]); ++a)
 859                 if (cmdstr[a] == '&')
 860                         return (tolower(cmdstr[a + 1]));
 861         return (0);
 862 }
 863
 864
 865 /*
 866  * Output the string from a key command without the ampersand
 867  * "mode" should be set to 0 for normal or 1 for <C>ommand key highlighting
 868  */
 869 char *cmd_expand(char *strbuf, int mode)
 870 {
 871         int a;
 872         static char exp[64];
 873         char buf[1024];
 874
 875         strcpy(exp, strbuf);
 876
 877         for (a = 0; exp[a]; ++a) {
 878                 if (strbuf[a] == '&') {
 879
 880                         /* dont echo these non mnemonic command keys */
 881                         int noecho = strbuf[a+1] == '<' || strbuf[a+1] == '>' || strbuf[a+1] == '+' || strbuf[a+1] == '-';
 882
 883                         if (mode == 0) {
 884                                 strcpy(&exp[a], &exp[a + 1 + noecho]);
 885                         }
 886                         if (mode == 1) {
 887                                 exp[a] = '<';
 888                                 strcpy(buf, &exp[a + 2]);
 889                                 exp[a + 2] = '>';
 890                                 exp[a + 3] = 0;
 891                                 strcat(exp, buf);
 892                         }
 893                 }
 894                 if (!strncmp(&exp[a], "^r", 2)) {
 895                         strcpy(buf, exp);
 896                         strcpy(&exp[a], room_name);
 897                         strcat(exp, &buf[a + 2]);
 898                 }
 899                 if (!strncmp(&exp[a], "^c", 2)) {
 900                         exp[a] = ',';
 901                         strcpy(&exp[a + 1], &exp[a + 2]);
 902                 }
 903         }
 904
 905         return (exp);
 906 }
 907
 908
 909
 910 /*
 911  * Comparison function to determine if entered commands match a
 912  * command loaded from the config file.
 913  */
 914 int cmdmatch(char *cmdbuf, struct citcmd *cptr, int ncomp)
 915 {
 916         int a;
 917         int cmdax;
 918
 919         cmdax = 0;
 920         if (is_room_aide)
 921                 cmdax = 1;
 922         if (axlevel >= 6)
 923                 cmdax = 2;
 924
 925         for (a = 0; a < ncomp; ++a) {
 926                 if ((tolower(cmdbuf[a]) != keycmd(cptr->c_keys[a]))
 927                     || (cptr->c_axlevel > cmdax))
 928                         return (0);
 929         }
 930         return (1);
 931 }
 932
 933
 934 /*
 935  * This function returns 1 if a given command requires a string input
 936  */
 937 int requires_string(struct citcmd *cptr, int ncomp)
 938 {
 939         int a;
 940         char buf[64];
 941
 942         strcpy(buf, cptr->c_keys[ncomp - 1]);
 943         for (a = 0; !IsEmptyStr(&buf[a]); ++a) {
 944                 if (buf[a] == ':')
 945                         return (1);
 946         }
 947         return (0);
 948 }
 949
 950
 951 /*
 952  * Input a command at the main prompt.
 953  * This function returns an integer command number.  If the command prompts
 954  * for a string then it is placed in the supplied buffer.
 955  */
 956 int getcmd(CtdlIPC *ipc, char *argbuf)
 957 {
 958         char cmdbuf[5];
 959         int cmdspaces[5];
 960         int cmdpos;
 961         int ch;
 962         int a;
 963         int got;
 964         int this_lazy_cmd;
 965         struct citcmd *cptr;
 966
 967         /*
 968          * Starting a new command now, so set sigcaught to 0.  This variable
 969          * is set to nonzero (usually NEXT_KEY or STOP_KEY) if a command has
 970          * been interrupted by a keypress.
 971          */
 972         sigcaught = 0;
 973
 974         /* Switch color support on or off if we're in user mode */
 975         if (rc_ansi_color == 3) {
 976                 if (userflags & US_COLOR)
 977                         enable_color = 1;
 978                 else
 979                         enable_color = 0;
 980         }
 981         /* if we're running in idiot mode, display a cute little menu */
 982
 983         IFNEXPERT {
 984                 scr_printf("-----------------------------------------------------------------------\n");
 985                 scr_printf("Room cmds:    <K>nown rooms, <G>oto next room, <.G>oto a specific room,\n");
 986                 scr_printf("              <S>kip this room, <A>bandon this room, <Z>ap this room,\n");
 987                 scr_printf("              <U>ngoto (move back)\n");
 988                 scr_printf("Message cmds: <N>ew msgs, <F>orward read, <R>everse read, <O>ld msgs,\n");
 989                 scr_printf("              <L>ast five msgs, <E>nter a message\n");
 990                 scr_printf("General cmds: <?> help, <T>erminate, <C>hat, <W>ho is online\n");
 991                 scr_printf("Misc:         <X> toggle eXpert mode, <D>irectory\n");
 992                 scr_printf("\n");
 993                 scr_printf(" (Type .Help SUMMARY for extended commands, <X> to hide this menu)\n");
 994                 scr_printf("-----------------------------------------------------------------------\n");
 995         }
 996
 997         print_instant();
 998         strcpy(argbuf, "");
 999         cmdpos = 0;
1000         for (a = 0; a < 5; ++a)
1001                 cmdbuf[a] = 0;
1002         /* now the room prompt... */
1003         ok_to_interrupt = 1;
1004         color(BRIGHT_WHITE);
1005         scr_printf("\n%s", room_name);
1006         color(DIM_WHITE);
1007         scr_printf("%c ", room_prompt(room_flags));
1008
1009         while (1) {
1010                 ch = inkey();
1011                 ok_to_interrupt = 0;
1012
1013                 /* Handle the backspace key, but only if there's something
1014                  * to backspace over...
1015                  */
1016                 if ((ch == 8) && (cmdpos > 0)) {
1017                         back(cmdspaces[cmdpos - 1] + 1);
1018                         cmdbuf[cmdpos] = 0;
1019                         --cmdpos;
1020                 }
1021                 /* Spacebar invokes "lazy traversal" commands */
1022                 if ((ch == 32) && (cmdpos == 0)) {
1023                         this_lazy_cmd = next_lazy_cmd;
1024                         if (this_lazy_cmd == 13)
1025                                 next_lazy_cmd = 5;
1026                         if (this_lazy_cmd == 5)
1027                                 next_lazy_cmd = 13;
1028                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1029                                 if (cptr->c_cmdnum == this_lazy_cmd) {
1030                                         for (a = 0; a < 5; ++a)
1031                                                 if (cptr->c_keys[a][0] != 0)
1032                                                         scr_printf("%s ", cmd_expand(
1033                                                                                         cptr->c_keys[a], 0));
1034                                         scr_printf("\n");
1035                                         return (this_lazy_cmd);
1036                                 }
1037                         }
1038                         scr_printf("\n");
1039                         return (this_lazy_cmd);
1040                 }
1041                 /* Otherwise, process the command */
1042                 cmdbuf[cmdpos] = tolower(ch);
1043
1044                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1045                         if (cmdmatch(cmdbuf, cptr, cmdpos + 1)) {
1046
1047                                 scr_printf("%s", cmd_expand(cptr->c_keys[cmdpos], 0));
1048                                 cmdspaces[cmdpos] = strlen(
1049                                     cmd_expand(cptr->c_keys[cmdpos], 0));
1050                                 if (cmdpos < 4)
1051                                         if ((cptr->c_keys[cmdpos + 1]) != 0)
1052                                                 scr_putc(' ');
1053                                 ++cmdpos;
1054                         }
1055                 }
1056
1057                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1058                         if (cmdmatch(cmdbuf, cptr, 5)) {
1059                                 /* We've found our command. */
1060                                 if (requires_string(cptr, cmdpos)) {
1061                                         argbuf[0] = 0;
1062                                         ctdl_getline(argbuf, 64, 0, 0);
1063                                 } else {
1064                                         scr_printf("\n");
1065                                 }
1066
1067                                 /* If this command is one that changes rooms,
1068                                  * then the next lazy-command (space bar)
1069                                  * should be "read new" instead of "goto"
1070                                  */
1071                                 if ((cptr->c_cmdnum == 5)
1072                                     || (cptr->c_cmdnum == 6)
1073                                     || (cptr->c_cmdnum == 47)
1074                                     || (cptr->c_cmdnum == 52)
1075                                     || (cptr->c_cmdnum == 16)
1076                                     || (cptr->c_cmdnum == 20))
1077                                         next_lazy_cmd = 13;
1078
1079                                 /* If this command is "read new"
1080                                  * then the next lazy-command (space bar)
1081                                  * should be "goto"
1082                                  */
1083                                 if (cptr->c_cmdnum == 13)
1084                                         next_lazy_cmd = 5;
1085
1086                                 return (cptr->c_cmdnum);
1087
1088                         }
1089                 }
1090
1091                 if (ch == '?') {
1092                         scr_printf("\rOne of ...                         \n");
1093                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1094                                 if (cmdmatch(cmdbuf, cptr, cmdpos)) {
1095                                         for (a = 0; a < 5; ++a) {
1096                                            keyopt(cmd_expand(cptr->c_keys[a], 1));
1097                                    scr_printf(" ");
1098                                         }
1099                                         scr_printf("\n");
1100                                 }
1101                         }
1102                 sigcaught = 0;
1103
1104                         scr_printf("\n%s%c ", room_name, room_prompt(room_flags));
1105                         got = 0;
1106                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1107                                 if ((got == 0) && (cmdmatch(cmdbuf, cptr, cmdpos))) {
1108                                         for (a = 0; a < cmdpos; ++a) {
1109                                                 scr_printf("%s ",
1110                                                        cmd_expand(cptr->c_keys[a], 0));
1111                                         }
1112                                         got = 1;
1113                                 }
1114                         }
1115                 }
1116         }
1117
1118 }
1119
1120
1121
1122
1123
1124 /*
1125  * set tty modes.  commands are:
1126  *
1127  * 01- set to Citadel mode
1128  * 2 - save current settings for later restoral
1129  * 3 - restore saved settings
1130  */
1131 #ifdef HAVE_TERMIOS_H
1132 void stty_ctdl(int cmd)
1133 {                               /* SysV version of stty_ctdl() */
1134         struct termios live;
1135         static struct termios saved_settings;
1136         static int last_cmd = 0;
1137
1138         if (cmd == SB_LAST)
1139                 cmd = last_cmd;
1140         else
1141                 last_cmd = cmd;
1142
1143         if ((cmd == 0) || (cmd == 1)) {
1144                 tcgetattr(0, &live);
1145                 live.c_iflag = ISTRIP | IXON | IXANY;
1146                 live.c_oflag = OPOST | ONLCR;
1147                 live.c_lflag = ISIG | NOFLSH;
1148
1149                 live.c_cc[VINTR] = 0;
1150                 live.c_cc[VQUIT] = 0;
1151
1152 #ifdef hpux
1153                 live.c_cc[VMIN] = 0;
1154                 live.c_cc[VTIME] = 0;
1155 #endif
1156
1157                 /* do we even need this stuff anymore? */
1158                 /* live.c_line=0; */
1159                 live.c_cc[VERASE] = 8;
1160                 live.c_cc[VKILL] = 24;
1161                 live.c_cc[VEOF] = 1;
1162                 live.c_cc[VEOL] = 255;
1163                 live.c_cc[VEOL2] = 0;
1164                 live.c_cc[VSTART] = 0;
1165                 tcsetattr(0, TCSADRAIN, &live);
1166         }
1167         if (cmd == 2) {
1168                 tcgetattr(0, &saved_settings);
1169         }
1170         if (cmd == 3) {
1171                 tcsetattr(0, TCSADRAIN, &saved_settings);
1172         }
1173
1174 }
1175 #else
1176 void stty_ctdl(int cmd)
1177 {                               /* BSD version of stty_ctdl() */
1178         struct sgttyb live;
1179         static struct sgttyb saved_settings;
1180         static int last_cmd = 0;
1181
1182         if (cmd == SB_LAST)
1183                 cmd = last_cmd;
1184         else
1185                 last_cmd = cmd;
1186
1187         if ((cmd == 0) || (cmd == 1)) {
1188                 gtty(0, &live);
1189                 live.sg_flags |= CBREAK;
1190                 live.sg_flags |= CRMOD;
1191                 live.sg_flags |= NL1;
1192                 live.sg_flags &= ~ECHO;
1193                 if (cmd == 1)
1194                         live.sg_flags |= NOFLSH;
1195                 stty(0, &live);
1196         }
1197         if (cmd == 2) {
1198                 gtty(0, &saved_settings);
1199         }
1200         if (cmd == 3) {
1201                 stty(0, &saved_settings);
1202         }
1203 }
1204 #endif
1205
1206
1207 /*
1208  * display_help()  -  help text viewer
1209  */
1210 void display_help(CtdlIPC *ipc, char *name)
1211 {
1212         int i;
1213         int num_helps = sizeof(helpnames) / sizeof(char *) ;
1214
1215         for (i=0; i<num_helps; ++i) {
1216                 if (!strcasecmp(name, helpnames[i])) {
1217                         fmout(screenwidth, NULL, helptexts[i], NULL, 0);
1218                         return;
1219                 }
1220         }
1221
1222         scr_printf("'%s' not found.  Enter one of:\n", name);
1223         for (i=0; i<num_helps; ++i) {
1224                 scr_printf("  %s\n", helpnames[i]);
1225         }
1226 }
1227
1228
1229 /*
1230  * fmout() - Citadel text formatter and paginator
1231  */
1232 int fmout(
1233         int width,      /* screen width to use */
1234         FILE *fpin,     /* file to read from, or NULL to format given text */
1235         char *text,     /* text to be formatted (when fpin is NULL */
1236         FILE *fpout,    /* file to write to, or NULL to write to screen */
1237         int subst)      /* nonzero if we should use hypertext mode */
1238 {
1239         char *buffer = NULL;    /* The current message */
1240         char *word = NULL;      /* What we are about to actually print */
1241         char *e;                /* Pointer to position in text */
1242         char old = 0;           /* The previous character */
1243         int column = 0;         /* Current column */
1244         size_t i;               /* Generic counter */
1245
1246         /* Space for a single word, which can be at most screenwidth */
1247         word = (char *)calloc(1, width);
1248         if (!word) {
1249                 scr_printf("Can't alloc memory to print message: %s!\n",
1250                                 strerror(errno));
1251                 logoff(NULL, 3);
1252         }
1253
1254         /* Read the entire message body into memory */
1255         if (fpin) {
1256                 buffer = load_message_from_file(fpin);
1257                 if (!buffer) {
1258                         scr_printf("Can't print message: %s!\n",
1259                                         strerror(errno));
1260                         logoff(NULL, 3);
1261                 }
1262         } else {
1263                 buffer = text;
1264         }
1265         e = buffer;
1266
1267         /* Run the message body */
1268         while (*e) {
1269                 /* Catch characters that shouldn't be there at all */
1270                 if (*e == '\r') {
1271                         e++;
1272                         continue;
1273                 }
1274                 /* First, are we looking at a newline? */
1275                 if (*e == '\n') {
1276                         e++;
1277                         if (*e == ' ') {        /* Paragraph */
1278                                 if (fpout) {
1279                                         fprintf(fpout, "\n");
1280                                 } else {
1281                                         scr_printf("\n");
1282                                 }
1283                                 column = 0;
1284                         } else if (old != ' ') {/* Don't print two spaces */
1285                                 if (fpout) {
1286                                         fprintf(fpout, " ");
1287                                 } else {
1288                                         scr_printf(" ");
1289                                 }
1290                                 column++;
1291                         }
1292                         old = '\n';
1293                         continue;
1294                 }
1295
1296                 /* Are we looking at a nonprintable?
1297                  * (This section is now commented out because we could be displaying
1298                  * a character set like UTF-8 or ISO-8859-1.)
1299                 if ( (*e < 32) || (*e > 126) ) {
1300                         e++;
1301                         continue;
1302                 } */
1303
1304                 /* Or are we looking at a space? */
1305                 if (*e == ' ') {
1306                         e++;
1307                         if (column >= width - 1) {
1308                                 /* Are we in the rightmost column? */
1309                                 if (fpout) {
1310                                         fprintf(fpout, "\n");
1311                                 } else {
1312                                         scr_printf("\n");
1313                                 }
1314                                 column = 0;
1315                         } else if (!(column == 0 && old == ' ')) {
1316                                 /* Eat only the first space on a line */
1317                                 if (fpout) {
1318                                         fprintf(fpout, " ");
1319                                 } else {
1320                                         scr_printf(" ");
1321                                 }
1322                                 column++;
1323                         }
1324                         /* ONLY eat the FIRST space on a line */
1325                         old = ' ';
1326                         continue;
1327                 }
1328                 old = *e;
1329
1330                 /* Read a word, slightly messy */
1331                 i = 0;
1332                 while (e[i]) {
1333                         if (!isprint(e[i]) && !isspace(e[i]))
1334                                 e[i] = ' ';
1335                         if (isspace(e[i]))
1336                                 break;
1337                         i++;
1338                 }
1339
1340                 /* We should never see these, but... slightly messy */
1341                 if (e[i] == '\t' || e[i] == '\f' || e[i] == '\v')
1342                         e[i] = ' ';
1343
1344                 /* Break up really long words */
1345                 /* TODO: auto-hyphenation someday? */
1346                 if (i >= width)
1347                         i = width - 1;
1348                 strncpy(word, e, i);
1349                 word[i] = 0;
1350
1351                 /* Decide where to print the word */
1352                 if (column + i >= width) {
1353                         /* Wrap to the next line */
1354                         if (fpout) {
1355                                 fprintf(fpout, "\n");
1356                         } else {
1357                                 scr_printf("\n");
1358                         }
1359                         column = 0;
1360                 }
1361
1362                 /* Print the word */
1363                 if (fpout) {
1364                         fprintf(fpout, "%s", word);
1365                 } else {
1366                         scr_printf("%s", word);
1367                 }
1368                 column += i;
1369                 e += i;         /* Start over with the whitepsace! */
1370         }
1371
1372         free(word);
1373         if (fpin)               /* We allocated this, remember? */
1374                 free(buffer);
1375
1376         /* Is this necessary?  It makes the output kind of spacey. */
1377         if (fpout) {
1378                 fprintf(fpout, "\n");
1379         } else {
1380                 scr_printf("\n");
1381         }
1382
1383         return sigcaught;
1384 }
1385
1386
1387 /*
1388  * support ANSI color if defined
1389  */
1390 void color(int colornum)
1391 {
1392         static int hold_color;
1393         static int current_color;
1394
1395         if (colornum == COLOR_PUSH) {
1396                 hold_color = current_color;
1397                 return;
1398         }
1399
1400         if (colornum == COLOR_POP) {
1401                 color(hold_color);
1402                 return;
1403         }
1404
1405         current_color = colornum;
1406         if (enable_color) {
1407                 /* When switching to dim white, actually output an 'original
1408                  * pair' sequence -- this looks better on black-on-white
1409                  * terminals. - Changed to ORIGINAL_PAIR as this actually
1410                  * wound up looking horrible on black-on-white terminals, not
1411                  * to mention transparent terminals.
1412                  */
1413                 if (colornum == ORIGINAL_PAIR)
1414                         printf("\033[0;39;49m");
1415                 else
1416                         printf("\033[%d;3%d;4%dm",
1417                                         (colornum & 8) ? 1 : 0,
1418                                         (colornum & 7),
1419                                         rc_color_use_bg);
1420
1421         }
1422 }
1423
1424 void cls(int colornum)
1425 {
1426         if (enable_color) {
1427                 printf("\033[4%dm\033[2J\033[H\033[0m",
1428                                 colornum ? colornum : rc_color_use_bg);
1429         }
1430 }
1431
1432
1433 /*
1434  * Detect whether ANSI color is available (answerback)
1435  */
1436 void send_ansi_detect(void)
1437 {
1438         if (rc_ansi_color == 2) {
1439                 printf("\033[c");
1440                 scr_flush();
1441                 time(&AnsiDetect);
1442         }
1443 }
1444
1445 void look_for_ansi(void)
1446 {
1447         fd_set rfds;
1448         struct timeval tv;
1449         char abuf[512];
1450         time_t now;
1451         int a, rv;
1452
1453         if (rc_ansi_color == 0) {
1454                 enable_color = 0;
1455         } else if (rc_ansi_color == 1) {
1456                 enable_color = 1;
1457         } else if (rc_ansi_color == 2) {
1458
1459                 /* otherwise, do the auto-detect */
1460
1461                 strcpy(abuf, "");
1462
1463                 time(&now);
1464                 if ((now - AnsiDetect) < 2)
1465                         sleep(1);
1466
1467                 do {
1468                         FD_ZERO(&rfds);
1469                         FD_SET(0, &rfds);
1470                         tv.tv_sec = 0;
1471                         tv.tv_usec = 1;
1472
1473                         select(1, &rfds, NULL, NULL, &tv);
1474                         if (FD_ISSET(0, &rfds)) {
1475                                 abuf[strlen(abuf) + 1] = 0;
1476                                 rv = read(0, &abuf[strlen(abuf)], 1);
1477                                 if (rv < 0) {
1478                                         scr_printf("failed to read after select: %s",
1479                                                    strerror(errno));
1480                                         break;
1481                                 }
1482                         }
1483                 } while (FD_ISSET(0, &rfds));
1484
1485                 for (a = 0; !IsEmptyStr(&abuf[a]); ++a) {
1486                         if ((abuf[a] == 27) && (abuf[a + 1] == '[')
1487                             && (abuf[a + 2] == '?')) {
1488                                 enable_color = 1;
1489                         }
1490                 }
1491         }
1492 }
1493
1494
1495 /*
1496  * Display key options (highlight hotkeys inside angle brackets)
1497  */
1498 void keyopt(char *buf) {
1499         int i;
1500
1501         color(DIM_WHITE);
1502         for (i=0; !IsEmptyStr(&buf[i]); ++i) {
1503                 if (buf[i]=='<') {
1504                         scr_printf("%c", buf[i]);
1505                         color(BRIGHT_MAGENTA);
1506                 } else {
1507                         if (buf[i]=='>'&& buf[i+1] != '>') {
1508                                 color(DIM_WHITE);
1509                         }
1510                         scr_printf("%c", buf[i]);
1511                 }
1512         }
1513         color(DIM_WHITE);
1514 }
1515
1516
1517
1518 /*
1519  * Present a key-menu line choice type of thing
1520  */
1521 char keymenu(char *menuprompt, char *menustring) {
1522         int i, c, a;
1523         int choices;
1524         int do_prompt = 0;
1525         char buf[1024];
1526         int ch;
1527         int display_prompt = 1;
1528
1529         choices = num_tokens(menustring, '|');
1530
1531         if (menuprompt != NULL) do_prompt = 1;
1532         if ((menuprompt != NULL) && (IsEmptyStr(menuprompt))) do_prompt = 0;
1533
1534         while (1) {
1535                 if (display_prompt) {
1536                         if (do_prompt) {
1537                                 scr_printf("%s ", menuprompt);
1538                         }
1539                         else {
1540                                 for (i=0; i<choices; ++i) {
1541                                         extract_token(buf, menustring, i, '|', sizeof buf);
1542                                         keyopt(buf);
1543                                         scr_printf(" ");
1544                                 }
1545                         }
1546                         scr_printf("-> ");
1547                         display_prompt = 0;
1548                 }
1549                 ch = lkey();
1550
1551                 if ( (do_prompt) && (ch=='?') ) {
1552                         scr_printf("\rOne of...                               ");
1553                         scr_printf("                                      \n");
1554                         for (i=0; i<choices; ++i) {
1555                                 extract_token(buf, menustring, i, '|', sizeof buf);
1556                                 scr_printf("   ");
1557                                 keyopt(buf);
1558                                 scr_printf("\n");
1559                         }
1560                         scr_printf("\n");
1561                         display_prompt = 1;
1562                 }
1563
1564                 for (i=0; i<choices; ++i) {
1565                         extract_token(buf, menustring, i, '|', sizeof buf);
1566                         for (c=1; !IsEmptyStr(&buf[c]); ++c) {
1567                                 if ( (ch == tolower(buf[c]))
1568                                    && (buf[c-1]=='<')
1569                                    && (buf[c+1]=='>') ) {
1570                                         for (a=0; !IsEmptyStr(&buf[a]); ++a) {
1571                                                 if ( (a!=(c-1)) && (a!=(c+1))) {
1572                                                         scr_putc(buf[a]);
1573                                                 }
1574                                         }
1575                                         scr_printf("\n");
1576                                         return ch;
1577                                 }
1578                         }
1579                 }
1580         }
1581 }