citadel/textclient/commands.c

   1 /*
   2  * This file contains functions which implement parts of the
   3  * text-mode user interface.
   4  *
   5  * Copyright (c) 1987-2012 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.h"
  55 #include "citadel_ipc.h"
  56 #include "commands.h"
  57 #include "messages.h"
  58 #include "citadel_decls.h"
  59 #include "routines.h"
  60 #include "routines2.h"
  61 #include "rooms.h"
  62 #include "client_chat.h"
  63 #include "citadel_dirs.h"
  64 #include "tuiconfig.h"
  65 #ifndef HAVE_SNPRINTF
  66 #include "snprintf.h"
  67 #endif
  68 #include "screen.h"
  69 #include "ecrash.h"
  70
  71 struct citcmd {
  72         struct citcmd *next;
  73         int c_cmdnum;
  74         int c_axlevel;
  75         char c_keys[5][64];
  76 };
  77
  78 #define IFNEXPERT if ((userflags&US_EXPERT)==0)
  79
  80
  81 int rc_exp_beep;
  82 char rc_exp_cmd[1024];
  83 int rc_allow_attachments;
  84 int rc_display_message_numbers;
  85 int rc_force_mail_prompts;
  86 int rc_remember_passwords;
  87 int rc_ansi_color;
  88 int rc_color_use_bg;
  89 int rc_prompt_control = 0;
  90 time_t rc_idle_threshold = (time_t)900;
  91 char rc_url_cmd[SIZ];
  92 char rc_open_cmd[SIZ];
  93 char rc_gotmail_cmd[SIZ];
  94
  95 char *gl_string;
  96 int next_lazy_cmd = 5;
  97
  98 extern int screenwidth, screenheight;
  99 extern int termn8;
 100 extern CtdlIPC *ipc_for_signal_handlers;        /* KLUDGE cover your eyes */
 101
 102 struct citcmd *cmdlist = NULL;
 103
 104
 105 /* these variables are local to this module */
 106 char keepalives_enabled = KA_YES;       /* send NOOPs to server when idle */
 107 int ok_to_interrupt = 0;                /* print instant msgs asynchronously */
 108 time_t AnsiDetect;                      /* when did we send the detect code? */
 109 int enable_color = 0;                   /* nonzero for ANSI color */
 110
 111
 112
 113
 114 /*
 115  * If an interesting key has been pressed, return its value, otherwise 0
 116  */
 117 char was_a_key_pressed(void) {
 118         fd_set rfds;
 119         struct timeval tv;
 120         int the_character;
 121         int retval;
 122
 123         FD_ZERO(&rfds);
 124         FD_SET(0, &rfds);
 125         tv.tv_sec = 0;
 126         tv.tv_usec = 0;
 127         retval = select(1, &rfds, NULL, NULL, &tv);
 128
 129         /* Careful!  Disable keepalives during keyboard polling; we're probably
 130          * in the middle of a data transfer from the server, in which case
 131          * sending a NOOP would throw the client protocol out of sync.
 132          */
 133         if ((retval > 0) && FD_ISSET(0, &rfds)) {
 134                 set_keepalives(KA_NO);
 135                 the_character = inkey();
 136                 set_keepalives(KA_YES);
 137         }
 138         else {
 139                 the_character = 0;
 140         }
 141         return(the_character);
 142 }
 143
 144
 145
 146
 147
 148 /*
 149  * print_instant()  -  print instant messages if there are any
 150  */
 151 void print_instant(void)
 152 {
 153         char buf[1024];
 154         FILE *outpipe;
 155         time_t timestamp;
 156         struct tm stamp;
 157         int flags = 0;
 158         char sender[64];
 159         char node[64];
 160         char *listing = NULL;
 161         int r;                  /* IPC result code */
 162
 163         if (instant_msgs == 0)
 164                 return;
 165
 166         if (rc_exp_beep) {
 167                 ctdl_beep();
 168         }
 169         if (IsEmptyStr(rc_exp_cmd)) {
 170                 color(BRIGHT_RED);
 171                 scr_printf("\r---");
 172         }
 173
 174         while (instant_msgs != 0) {
 175                 r = CtdlIPCGetInstantMessage(ipc_for_signal_handlers, &listing, buf);
 176                 if (r / 100 != 1)
 177                         return;
 178
 179                 instant_msgs = extract_int(buf, 0);
 180                 timestamp = extract_long(buf, 1);
 181                 flags = extract_int(buf, 2);
 182                 extract_token(sender, buf, 3, '|', sizeof sender);
 183                 extract_token(node, buf, 4, '|', sizeof node);
 184                 strcpy(last_paged, sender);
 185
 186                 localtime_r(&timestamp, &stamp);
 187
 188                 /* If the page is a Logoff Request, honor it. */
 189                 if (flags & 2) {
 190                         termn8 = 1;
 191                         return;
 192                 }
 193
 194                 if (!IsEmptyStr(rc_exp_cmd)) {
 195                         outpipe = popen(rc_exp_cmd, "w");
 196                         if (outpipe != NULL) {
 197                                 /* Header derived from flags */
 198                                 if (flags & 2)
 199                                         fprintf(outpipe,
 200                                                "Please log off now, as requested ");
 201                                 else if (flags & 1)
 202                                         fprintf(outpipe, "Broadcast message ");
 203                                 else if (flags & 4)
 204                                         fprintf(outpipe, "Chat request ");
 205                                 else
 206                                         fprintf(outpipe, "Message ");
 207                                 /* Timestamp.  Can this be improved? */
 208                                 if (stamp.tm_hour == 0 || stamp.tm_hour == 12)
 209                                         fprintf(outpipe, "at 12:%02d%cm",
 210                                                 stamp.tm_min,
 211                                                 stamp.tm_hour ? 'p' : 'a');
 212                                 else if (stamp.tm_hour > 12)            /* pm */
 213                                         fprintf(outpipe, "at %d:%02dpm",
 214                                                 stamp.tm_hour - 12,
 215                                                 stamp.tm_min);
 216                                 else                                    /* am */
 217                                         fprintf(outpipe, "at %d:%02dam",
 218                                                 stamp.tm_hour, stamp.tm_min);
 219                                 fprintf(outpipe, " from %s", sender);
 220                                 if (strncmp(ipc_for_signal_handlers->ServInfo.nodename, node, 32))
 221                                         fprintf(outpipe, " @%s", node);
 222                                 fprintf(outpipe, ":\n%s\n", listing);
 223                                 pclose(outpipe);
 224                                 if (instant_msgs == 0)
 225                                         return;
 226                                 continue;
 227                         }
 228                 }
 229                 /* fall back to built-in instant message display */
 230                 scr_printf("\n");
 231
 232                 /* Header derived from flags */
 233                 if (flags & 2)
 234                         scr_printf("Please log off now, as requested ");
 235                 else if (flags & 1)
 236                         scr_printf("Broadcast message ");
 237                 else if (flags & 4)
 238                         scr_printf("Chat request ");
 239                 else
 240                         scr_printf("Message ");
 241
 242                 /* Timestamp.  Can this be improved? */
 243                 if (stamp.tm_hour == 0 || stamp.tm_hour == 12)/* 12am/12pm */
 244                         scr_printf("at 12:%02d%cm", stamp.tm_min,
 245                                 stamp.tm_hour ? 'p' : 'a');
 246                 else if (stamp.tm_hour > 12)                    /* pm */
 247                         scr_printf("at %d:%02dpm",
 248                                 stamp.tm_hour - 12, stamp.tm_min);
 249                 else                                            /* am */
 250                         scr_printf("at %d:%02dam", stamp.tm_hour, stamp.tm_min);
 251
 252                 /* Sender */
 253                 scr_printf(" from %s", sender);
 254
 255                 /* Remote node, if any */
 256                 if (strncmp(ipc_for_signal_handlers->ServInfo.nodename, node, 32))
 257                         scr_printf(" @%s", node);
 258
 259                 scr_printf(":\n");
 260                 fmout(screenwidth, NULL, listing, NULL, 0);
 261                 free(listing);
 262
 263         }
 264         scr_printf("\n---\n");
 265         color(BRIGHT_WHITE);
 266
 267
 268 }
 269
 270
 271 void set_keepalives(int s)
 272 {
 273         keepalives_enabled = (char) s;
 274 }
 275
 276 /*
 277  * This loop handles the "keepalive" messages sent to the server when idling.
 278  */
 279
 280 static time_t idlet = 0;
 281 static void really_do_keepalive(void) {
 282
 283         time(&idlet);
 284
 285         /* This may sometimes get called before we are actually connected
 286          * to the server.  Don't do anything if we aren't connected. -IO
 287          */
 288         if (!ipc_for_signal_handlers)
 289                 return;
 290
 291         /* If full keepalives are enabled, send a NOOP to the server and
 292          * wait for a response.
 293          */
 294         if (keepalives_enabled == KA_YES) {
 295                 CtdlIPCNoop(ipc_for_signal_handlers);
 296                 if (instant_msgs > 0) {
 297                         if (ok_to_interrupt == 1) {
 298                                 scr_printf("\r%64s\r", "");
 299                                 print_instant();
 300                                 scr_printf("%s%c ", room_name,
 301                                        room_prompt(room_flags));
 302                                 scr_flush();
 303                         }
 304                 }
 305         }
 306
 307         /* If half keepalives are enabled, send a QNOP to the server (if the
 308          * server supports it) and then do nothing.
 309          */
 310         if ( (keepalives_enabled == KA_HALF)
 311            && (ipc_for_signal_handlers->ServInfo.supports_qnop > 0) ) {
 312                 CtdlIPC_chat_send(ipc_for_signal_handlers, "QNOP");
 313         }
 314 }
 315
 316 /* threaded nonblocking keepalive stuff starts here. I'm going for a simple
 317    encapsulated interface; in theory there should be no need to touch these
 318    globals outside of the async_ka_* functions. */
 319
 320 #ifdef THREADED_CLIENT
 321 static pthread_t ka_thr_handle;
 322 static int ka_thr_active = 0;
 323 static int async_ka_enabled = 0;
 324
 325 static void *ka_thread(void *arg)
 326 {
 327 #ifdef HAVE_BACKTRACE
 328         char threadName[256];
 329
 330         // Set up our name
 331         sprintf(threadName, "ka_Thread n");
 332
 333         // Register for tracing
 334         eCrash_RegisterThread(threadName, 0);
 335 #endif
 336         really_do_keepalive();
 337         pthread_detach(ka_thr_handle);
 338         ka_thr_active = 0;
 339
 340 #ifdef HAVE_BACKTRACE
 341         eCrash_UnregisterThread();
 342 #endif
 343         return NULL;
 344 }
 345
 346 /* start up a thread to handle a keepalive in the background */
 347 static void async_ka_exec(void)
 348 {
 349         if (!ka_thr_active) {
 350                 ka_thr_active = 1;
 351                 if (pthread_create(&ka_thr_handle, NULL, ka_thread, NULL)) {
 352                         perror("pthread_create");
 353                         exit(1);
 354                 }
 355         }
 356 }
 357 #endif /* THREADED_CLIENT */
 358
 359 /* I changed this from static to not because I need to call it from
 360    screen.c, either that or make something in screen.c not static.
 361    Fix it how you like. Why all the staticness? stu */
 362
 363 void do_keepalive(void)
 364 {
 365         time_t now;
 366
 367         time(&now);
 368         if ((now - idlet) < ((long) S_KEEPALIVE))
 369                 return;
 370
 371         /* Do a space-backspace to keep telnet sessions from idling out */
 372         scr_printf(" %c", 8);
 373         scr_flush();
 374
 375 #ifdef THREADED_CLIENT
 376         if (async_ka_enabled)
 377                 async_ka_exec();
 378         else
 379 #endif
 380                 really_do_keepalive();
 381 }
 382
 383
 384 /* Now the actual async-keepalve API that we expose to higher levels:
 385    async_ka_start() and async_ka_end(). These do nothing when we don't have
 386    threading enabled, so we avoid sprinkling ifdef's throughout the code. */
 387
 388 /* wait for a background keepalive to complete. this must be done before
 389    attempting any further server requests! */
 390 void async_ka_end(void)
 391 {
 392 #ifdef THREADED_CLIENT
 393         if (ka_thr_active)
 394                 pthread_join(ka_thr_handle, NULL);
 395
 396         async_ka_enabled--;
 397 #endif
 398 }
 399
 400 /* tell do_keepalive() that keepalives are asynchronous. */
 401 void async_ka_start(void)
 402 {
 403 #ifdef THREADED_CLIENT
 404         async_ka_enabled++;
 405 #endif
 406 }
 407
 408
 409 int inkey(void)
 410 {                               /* get a character from the keyboard, with   */
 411         int a;                  /* the watchdog timer in effect if necessary */
 412         fd_set rfds;
 413         struct timeval tv;
 414         time_t start_time;
 415
 416         scr_flush();
 417         time(&start_time);
 418
 419         do {
 420                 /* This loop waits for keyboard input.  If the keepalive
 421                  * timer expires, it sends a keepalive to the server if
 422                  * necessary and then waits again.
 423                  */
 424                 do {
 425                         do_keepalive();
 426
 427                         FD_ZERO(&rfds);
 428                         FD_SET(0, &rfds);
 429                         tv.tv_sec = S_KEEPALIVE;
 430                         tv.tv_usec = 0;
 431
 432                         select(1, &rfds, NULL, NULL, &tv);
 433                 } while (!FD_ISSET(0, &rfds));
 434
 435                 /* At this point, there's input, so fetch it.
 436                  * (There's a hole in the bucket...)
 437                  */
 438                 a = scr_getc(SCR_BLOCK);
 439                 if (a == 127) {
 440                         a = 8;
 441                 }
 442                 if (a == 13) {
 443                         a = 10;
 444                 }
 445         } while (a == 0);
 446         return (a);
 447 }
 448
 449
 450 int yesno(void)
 451 {                               /* Returns 1 for yes, 0 for no */
 452         int a;
 453         while (1) {
 454                 a = inkey();
 455                 a = tolower(a);
 456                 if (a == 'y') {
 457                         scr_printf("Yes\n");
 458                         return (1);
 459                 }
 460                 if (a == 'n') {
 461                         scr_printf("No\n");
 462                         return (0);
 463                 }
 464         }
 465 }
 466
 467 /* Returns 1 for yes, 0 for no, arg is default value */
 468 int yesno_d(int d)
 469 {
 470         int a;
 471         while (1) {
 472                 a = inkey();
 473                 a = tolower(a);
 474                 if (a == 10)
 475                         a = (d ? 'y' : 'n');
 476                 if (a == 'y') {
 477                         scr_printf("Yes\n");
 478                         return (1);
 479                 }
 480                 if (a == 'n') {
 481                         scr_printf("No\n");
 482                         return (0);
 483                 }
 484         }
 485 }
 486
 487
 488
 489
 490 /* Gets a line from the terminal */
 491 /* string == Pointer to string buffer */
 492 /* lim == Maximum length - if negative, no-show */
 493 void ctdl_getline(char *string, int lim)
 494 {
 495         int a, b;
 496         char flag = 0;
 497
 498         if (lim < 0) {
 499                 lim = (0 - lim);
 500                 flag = 1;
 501         }
 502         strcpy(string, "");
 503         gl_string = string;
 504         async_ka_start();
 505
 506 GLA:    a = inkey();
 507         /* a = (a & 127); ** commented out because it isn't just an ASCII world anymore */
 508         if ((a == 8 || a == 23) && (IsEmptyStr(string)))
 509                 goto GLA;
 510         if ((a != 10) && (a != 8) && (strlen(string) == lim))
 511                 goto GLA;
 512         if ((a == 8) && (string[0] != 0)) {
 513                 string[strlen(string) - 1] = 0;
 514                 scr_putc(8); scr_putc(32); scr_putc(8);
 515                 goto GLA;
 516         }
 517         if ((a == 23) && (string[0] != 0)) {
 518                 do {
 519                         string[strlen(string) - 1] = 0;
 520                         scr_putc(8); scr_putc(32); scr_putc(8);
 521                 } while (!IsEmptyStr(string) && string[strlen(string) - 1] != ' ');
 522                 goto GLA;
 523         }
 524         if ((a == 10)) {
 525                 scr_putc(10);
 526                 async_ka_end();
 527                 return;
 528         }
 529         if (a < 32)
 530                 a = '.';
 531         b = strlen(string);
 532         string[b] = a;
 533         string[b + 1] = 0;
 534         if (flag == 0)
 535                 scr_putc(a);
 536         if (flag == 1)
 537                 scr_putc('*');
 538         goto GLA;
 539 }
 540
 541
 542 /*
 543  * strprompt()  -  prompt for a string, print the existing value and
 544  *                 allow the user to press return to keep it...
 545  */
 546 void strprompt(char *prompt, char *str, int len)
 547 {
 548         int i;
 549         char buf[128];
 550
 551         print_instant();
 552         color(DIM_WHITE);
 553         scr_printf("%s ", prompt);
 554         color(DIM_MAGENTA);
 555         scr_printf("[");
 556         color(BRIGHT_MAGENTA);
 557
 558         if (len >= 0) {
 559                 scr_printf("%s", str);
 560         }
 561         else {
 562                 for (i=0; !IsEmptyStr(&str[i]); ++i) {
 563                         scr_printf("*");
 564                 }
 565         }
 566
 567         color(DIM_MAGENTA);
 568         scr_printf("]");
 569         color(DIM_WHITE);
 570         scr_printf(": ");
 571         color(BRIGHT_CYAN);
 572         ctdl_getline(buf, len);
 573         if (buf[0] != 0)
 574                 strcpy(str, buf);
 575         color(DIM_WHITE);
 576 }
 577
 578 /*
 579  * boolprompt()  -  prompt for a yes/no, print the existing value and
 580  *                  allow the user to press return to keep it...
 581  */
 582 int boolprompt(char *prompt, int prev_val)
 583 {
 584         int r;
 585
 586         color(DIM_WHITE);
 587         scr_printf("%s ", prompt);
 588         color(DIM_MAGENTA);
 589         scr_printf("[");
 590         color(BRIGHT_MAGENTA);
 591         scr_printf("%s", (prev_val ? "Yes" : "No"));
 592         color(DIM_MAGENTA);
 593         scr_printf("]: ");
 594         color(BRIGHT_CYAN);
 595         r = (yesno_d(prev_val));
 596         color(DIM_WHITE);
 597         return r;
 598 }
 599
 600 /*
 601  * intprompt()  -  like strprompt(), except for an integer
 602  *                 (note that it RETURNS the new value!)
 603  */
 604 int intprompt(char *prompt, int ival, int imin, int imax)
 605 {
 606         char buf[16];
 607         int i;
 608         int p;
 609
 610         do {
 611                 i = ival;
 612                 snprintf(buf, sizeof buf, "%d", i);
 613                 strprompt(prompt, buf, 15);
 614                 i = atoi(buf);
 615                 for (p=0; !IsEmptyStr(&buf[p]); ++p) {
 616                         if ( (!isdigit(buf[p]))
 617                            && ( (buf[p]!='-') || (p!=0) )  )
 618                                 i = imin - 1;
 619                 }
 620                 if (i < imin)
 621                         scr_printf("*** Must be no less than %d.\n", imin);
 622                 if (i > imax)
 623                         scr_printf("*** Must be no more than %d.\n", imax);
 624         } while ((i < imin) || (i > imax));
 625         return (i);
 626 }
 627
 628 /*
 629  * newprompt()  -  prompt for a string with no existing value
 630  *                 (clears out string buffer first)
 631  */
 632 void newprompt(char *prompt, char *str, int len)
 633 {
 634         color(BRIGHT_MAGENTA);
 635         scr_printf("%s", prompt);
 636         color(DIM_MAGENTA);
 637         ctdl_getline(str, len);
 638         color(DIM_WHITE);
 639 }
 640
 641
 642 int lkey(void)
 643 {                               /* returns a lower case value */
 644         int a;
 645         a = inkey();
 646         if (isupper(a))
 647                 a = tolower(a);
 648         return (a);
 649 }
 650
 651 /*
 652  * parse the citadel.rc file
 653  */
 654 void load_command_set(void)
 655 {
 656         FILE *ccfile;
 657         char buf[1024];
 658         struct citcmd *cptr;
 659         struct citcmd *lastcmd = NULL;
 660         int a, d;
 661         int b = 0;
 662
 663         /* first, set up some defaults for non-required variables */
 664
 665         strcpy(editor_path, "");
 666         strcpy(printcmd, "");
 667         strcpy(imagecmd, "");
 668         strcpy(rc_username, "");
 669         strcpy(rc_password, "");
 670         rc_floor_mode = 0;
 671         rc_exp_beep = 1;
 672         rc_allow_attachments = 0;
 673         rc_remember_passwords = 0;
 674         strcpy(rc_exp_cmd, "");
 675         rc_display_message_numbers = 0;
 676         rc_force_mail_prompts = 0;
 677         rc_ansi_color = 0;
 678         rc_color_use_bg = 0;
 679         strcpy(rc_url_cmd, "");
 680         strcpy(rc_open_cmd, "");
 681         strcpy(rc_gotmail_cmd, "");
 682 #ifdef HAVE_OPENSSL
 683         rc_encrypt = RC_DEFAULT;
 684 #endif
 685
 686         /* now try to open the citadel.rc file */
 687
 688         ccfile = NULL;
 689         if (getenv("HOME") != NULL) {
 690                 snprintf(buf, sizeof buf, "%s/.citadelrc", getenv("HOME"));
 691                 ccfile = fopen(buf, "r");
 692         }
 693         if (ccfile == NULL) {
 694                 ccfile = fopen(file_citadel_rc, "r");
 695         }
 696         if (ccfile == NULL) {
 697                 ccfile = fopen("/etc/citadel.rc", "r");
 698         }
 699         if (ccfile == NULL) {
 700                 ccfile = fopen("./citadel.rc", "r");
 701         }
 702         if (ccfile == NULL) {
 703                 perror("commands: cannot open citadel.rc");
 704                 logoff(NULL, 3);
 705         }
 706         while (fgets(buf, sizeof buf, ccfile) != NULL) {
 707                 while ((!IsEmptyStr(buf)) ? (isspace(buf[strlen(buf) - 1])) : 0)
 708                         buf[strlen(buf) - 1] = 0;
 709
 710                 if (!strncasecmp(buf, "encrypt=", 8)) {
 711                         if (!strcasecmp(&buf[8], "yes")) {
 712 #ifdef HAVE_OPENSSL
 713                                 rc_encrypt = RC_YES;
 714 #else
 715                                 fprintf(stderr, "citadel.rc requires encryption support but citadel is not compiled with OpenSSL");
 716                                 logoff(NULL, 3);
 717 #endif
 718                         }
 719 #ifdef HAVE_OPENSSL
 720                         else if (!strcasecmp(&buf[8], "no")) {
 721                                 rc_encrypt = RC_NO;
 722                         }
 723                         else if (!strcasecmp(&buf[8], "default")) {
 724                                 rc_encrypt = RC_DEFAULT;
 725                         }
 726 #endif
 727                 }
 728
 729                 if (!strncasecmp(buf, "editor=", 7)) {
 730                         strcpy(editor_path, &buf[7]);
 731                 }
 732
 733                 if (!strncasecmp(buf, "printcmd=", 9))
 734                         strcpy(printcmd, &buf[9]);
 735
 736                 if (!strncasecmp(buf, "imagecmd=", 9))
 737                         strcpy(imagecmd, &buf[9]);
 738
 739                 if (!strncasecmp(buf, "expcmd=", 7))
 740                         strcpy(rc_exp_cmd, &buf[7]);
 741
 742                 if (!strncasecmp(buf, "use_floors=", 11)) {
 743                         if (!strcasecmp(&buf[11], "yes"))
 744                                 rc_floor_mode = RC_YES;
 745                         if (!strcasecmp(&buf[11], "no"))
 746                                 rc_floor_mode = RC_NO;
 747                         if (!strcasecmp(&buf[11], "default"))
 748                                 rc_floor_mode = RC_DEFAULT;
 749                 }
 750                 if (!strncasecmp(buf, "beep=", 5)) {
 751                         rc_exp_beep = atoi(&buf[5]);
 752                 }
 753                 if (!strncasecmp(buf, "allow_attachments=", 18)) {
 754                         rc_allow_attachments = atoi(&buf[18]);
 755                 }
 756                 if (!strncasecmp(buf, "idle_threshold=", 15)) {
 757                         rc_idle_threshold = atol(&buf[15]);
 758                 }
 759                 if (!strncasecmp(buf, "remember_passwords=", 19)) {
 760                         rc_remember_passwords = atoi(&buf[19]);
 761                 }
 762                 if (!strncasecmp(buf, "display_message_numbers=", 24)) {
 763                         rc_display_message_numbers = atoi(&buf[24]);
 764                 }
 765                 if (!strncasecmp(buf, "force_mail_prompts=", 19)) {
 766                         rc_force_mail_prompts = atoi(&buf[19]);
 767                 }
 768                 if (!strncasecmp(buf, "ansi_color=", 11)) {
 769                         if (!strncasecmp(&buf[11], "on", 2))
 770                                 rc_ansi_color = 1;
 771                         if (!strncasecmp(&buf[11], "auto", 4))
 772                                 rc_ansi_color = 2;      /* autodetect */
 773                         if (!strncasecmp(&buf[11], "user", 4))
 774                                 rc_ansi_color = 3;      /* user config */
 775                 }
 776                 if (!strncasecmp(buf, "status_line=", 12)) {
 777                         if (!strncasecmp(&buf[12], "on", 2))
 778                                 enable_status_line = 1;
 779                 }
 780                 if (!strncasecmp(buf, "use_background=", 15)) {
 781                         if (!strncasecmp(&buf[15], "on", 2))
 782                                 rc_color_use_bg = 9;
 783                 }
 784                 if (!strncasecmp(buf, "prompt_control=", 15)) {
 785                         if (!strncasecmp(&buf[15], "on", 2))
 786                                 rc_prompt_control = 1;
 787                         if (!strncasecmp(&buf[15], "user", 4))
 788                                 rc_prompt_control = 3;  /* user config */
 789                 }
 790                 if (!strncasecmp(buf, "username=", 9))
 791                         strcpy(rc_username, &buf[9]);
 792
 793                 if (!strncasecmp(buf, "password=", 9))
 794                         strcpy(rc_password, &buf[9]);
 795
 796                 if (!strncasecmp(buf, "urlcmd=", 7))
 797                         strcpy(rc_url_cmd, &buf[7]);
 798
 799                 if (!strncasecmp(buf, "opencmd=", 7))
 800                         strcpy(rc_open_cmd, &buf[8]);
 801
 802                 if (!strncasecmp(buf, "gotmailcmd=", 11))
 803                         strcpy(rc_gotmail_cmd, &buf[11]);
 804
 805                 if (!strncasecmp(buf, "cmd=", 4)) {
 806                         strcpy(buf, &buf[4]);
 807
 808                         cptr = (struct citcmd *) malloc(sizeof(struct citcmd));
 809
 810                         cptr->c_cmdnum = atoi(buf);
 811                         for (d = strlen(buf); d >= 0; --d)
 812                                 if (buf[d] == ',')
 813                                         b = d;
 814                         strcpy(buf, &buf[b + 1]);
 815
 816                         cptr->c_axlevel = atoi(buf);
 817                         for (d = strlen(buf); d >= 0; --d)
 818                                 if (buf[d] == ',')
 819                                         b = d;
 820                         strcpy(buf, &buf[b + 1]);
 821
 822                         for (a = 0; a < 5; ++a)
 823                                 cptr->c_keys[a][0] = 0;
 824
 825                         a = 0;
 826                         b = 0;
 827                         buf[strlen(buf) + 1] = 0;
 828                         while (!IsEmptyStr(buf)) {
 829                                 b = strlen(buf);
 830                                 for (d = strlen(buf); d >= 0; --d)
 831                                         if (buf[d] == ',')
 832                                                 b = d;
 833                                 strncpy(cptr->c_keys[a], buf, b);
 834                                 cptr->c_keys[a][b] = 0;
 835                                 if (buf[b] == ',')
 836                                         strcpy(buf, &buf[b + 1]);
 837                                 else
 838                                         strcpy(buf, "");
 839                                 ++a;
 840                         }
 841
 842                         cptr->next = NULL;
 843                         if (cmdlist == NULL)
 844                                 cmdlist = cptr;
 845                         else
 846                                 lastcmd->next = cptr;
 847                         lastcmd = cptr;
 848                 }
 849         }
 850         fclose(ccfile);
 851 }
 852
 853
 854
 855 /*
 856  * return the key associated with a command
 857  */
 858 char keycmd(char *cmdstr)
 859 {
 860         int a;
 861
 862         for (a = 0; !IsEmptyStr(&cmdstr[a]); ++a)
 863                 if (cmdstr[a] == '&')
 864                         return (tolower(cmdstr[a + 1]));
 865         return (0);
 866 }
 867
 868
 869 /*
 870  * Output the string from a key command without the ampersand
 871  * "mode" should be set to 0 for normal or 1 for <C>ommand key highlighting
 872  */
 873 char *cmd_expand(char *strbuf, int mode)
 874 {
 875         int a;
 876         static char exp[64];
 877         char buf[1024];
 878
 879         strcpy(exp, strbuf);
 880
 881         for (a = 0; exp[a]; ++a) {
 882                 if (strbuf[a] == '&') {
 883
 884                         /* dont echo these non mnemonic command keys */
 885                         int noecho = strbuf[a+1] == '<' || strbuf[a+1] == '>' || strbuf[a+1] == '+' || strbuf[a+1] == '-';
 886
 887                         if (mode == 0) {
 888                                 strcpy(&exp[a], &exp[a + 1 + noecho]);
 889                         }
 890                         if (mode == 1) {
 891                                 exp[a] = '<';
 892                                 strcpy(buf, &exp[a + 2]);
 893                                 exp[a + 2] = '>';
 894                                 exp[a + 3] = 0;
 895                                 strcat(exp, buf);
 896                         }
 897                 }
 898                 if (!strncmp(&exp[a], "^r", 2)) {
 899                         strcpy(buf, exp);
 900                         strcpy(&exp[a], room_name);
 901                         strcat(exp, &buf[a + 2]);
 902                 }
 903                 if (!strncmp(&exp[a], "^c", 2)) {
 904                         exp[a] = ',';
 905                         strcpy(&exp[a + 1], &exp[a + 2]);
 906                 }
 907         }
 908
 909         return (exp);
 910 }
 911
 912
 913
 914 /*
 915  * Comparison function to determine if entered commands match a
 916  * command loaded from the config file.
 917  */
 918 int cmdmatch(char *cmdbuf, struct citcmd *cptr, int ncomp)
 919 {
 920         int a;
 921         int cmdax;
 922
 923         cmdax = 0;
 924         if (is_room_aide)
 925                 cmdax = 1;
 926         if (axlevel >= 6)
 927                 cmdax = 2;
 928
 929         for (a = 0; a < ncomp; ++a) {
 930                 if ((tolower(cmdbuf[a]) != keycmd(cptr->c_keys[a]))
 931                     || (cptr->c_axlevel > cmdax))
 932                         return (0);
 933         }
 934         return (1);
 935 }
 936
 937
 938 /*
 939  * This function returns 1 if a given command requires a string input
 940  */
 941 int requires_string(struct citcmd *cptr, int ncomp)
 942 {
 943         int a;
 944         char buf[64];
 945
 946         strcpy(buf, cptr->c_keys[ncomp - 1]);
 947         for (a = 0; !IsEmptyStr(&buf[a]); ++a) {
 948                 if (buf[a] == ':')
 949                         return (1);
 950         }
 951         return (0);
 952 }
 953
 954
 955 /*
 956  * Input a command at the main prompt.
 957  * This function returns an integer command number.  If the command prompts
 958  * for a string then it is placed in the supplied buffer.
 959  */
 960 int getcmd(CtdlIPC *ipc, char *argbuf)
 961 {
 962         char cmdbuf[5];
 963         int cmdspaces[5];
 964         int cmdpos;
 965         int ch;
 966         int a;
 967         int got;
 968         int this_lazy_cmd;
 969         struct citcmd *cptr;
 970
 971         /*
 972          * Starting a new command now, so set sigcaught to 0.  This variable
 973          * is set to nonzero (usually NEXT_KEY or STOP_KEY) if a command has
 974          * been interrupted by a keypress.
 975          */
 976         sigcaught = 0;
 977
 978         /* Switch color support on or off if we're in user mode */
 979         if (rc_ansi_color == 3) {
 980                 if (userflags & US_COLOR)
 981                         enable_color = 1;
 982                 else
 983                         enable_color = 0;
 984         }
 985         /* if we're running in idiot mode, display a cute little menu */
 986         IFNEXPERT formout(ipc, "mainmenu");
 987
 988         print_instant();
 989         strcpy(argbuf, "");
 990         cmdpos = 0;
 991         for (a = 0; a < 5; ++a)
 992                 cmdbuf[a] = 0;
 993         /* now the room prompt... */
 994         ok_to_interrupt = 1;
 995         color(BRIGHT_WHITE);
 996         scr_printf("\n%s", room_name);
 997         color(DIM_WHITE);
 998         scr_printf("%c ", room_prompt(room_flags));
 999
1000         while (1) {
1001                 ch = inkey();
1002                 ok_to_interrupt = 0;
1003
1004                 /* Handle the backspace key, but only if there's something
1005                  * to backspace over...
1006                  */
1007                 if ((ch == 8) && (cmdpos > 0)) {
1008                         back(cmdspaces[cmdpos - 1] + 1);
1009                         cmdbuf[cmdpos] = 0;
1010                         --cmdpos;
1011                 }
1012                 /* Spacebar invokes "lazy traversal" commands */
1013                 if ((ch == 32) && (cmdpos == 0)) {
1014                         this_lazy_cmd = next_lazy_cmd;
1015                         if (this_lazy_cmd == 13)
1016                                 next_lazy_cmd = 5;
1017                         if (this_lazy_cmd == 5)
1018                                 next_lazy_cmd = 13;
1019                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1020                                 if (cptr->c_cmdnum == this_lazy_cmd) {
1021                                         for (a = 0; a < 5; ++a)
1022                                                 if (cptr->c_keys[a][0] != 0)
1023                                                         scr_printf("%s ", cmd_expand(
1024                                                                                         cptr->c_keys[a], 0));
1025                                         scr_printf("\n");
1026                                         return (this_lazy_cmd);
1027                                 }
1028                         }
1029                         scr_printf("\n");
1030                         return (this_lazy_cmd);
1031                 }
1032                 /* Otherwise, process the command */
1033                 cmdbuf[cmdpos] = tolower(ch);
1034
1035                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1036                         if (cmdmatch(cmdbuf, cptr, cmdpos + 1)) {
1037
1038                                 scr_printf("%s", cmd_expand(cptr->c_keys[cmdpos], 0));
1039                                 cmdspaces[cmdpos] = strlen(
1040                                     cmd_expand(cptr->c_keys[cmdpos], 0));
1041                                 if (cmdpos < 4)
1042                                         if ((cptr->c_keys[cmdpos + 1]) != 0)
1043                                                 scr_putc(' ');
1044                                 ++cmdpos;
1045                         }
1046                 }
1047
1048                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1049                         if (cmdmatch(cmdbuf, cptr, 5)) {
1050                                 /* We've found our command. */
1051                                 if (requires_string(cptr, cmdpos)) {
1052                                         ctdl_getline(argbuf, 64);
1053                                 } else {
1054                                         scr_printf("\n");
1055                                 }
1056
1057                                 /* If this command is one that changes rooms,
1058                                  * then the next lazy-command (space bar)
1059                                  * should be "read new" instead of "goto"
1060                                  */
1061                                 if ((cptr->c_cmdnum == 5)
1062                                     || (cptr->c_cmdnum == 6)
1063                                     || (cptr->c_cmdnum == 47)
1064                                     || (cptr->c_cmdnum == 52)
1065                                     || (cptr->c_cmdnum == 16)
1066                                     || (cptr->c_cmdnum == 20))
1067                                         next_lazy_cmd = 13;
1068
1069                                 /* If this command is "read new"
1070                                  * then the next lazy-command (space bar)
1071                                  * should be "goto"
1072                                  */
1073                                 if (cptr->c_cmdnum == 13)
1074                                         next_lazy_cmd = 5;
1075
1076                                 return (cptr->c_cmdnum);
1077
1078                         }
1079                 }
1080
1081                 if (ch == '?') {
1082                         scr_printf("\rOne of ...                         \n");
1083                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1084                                 if (cmdmatch(cmdbuf, cptr, cmdpos)) {
1085                                         for (a = 0; a < 5; ++a) {
1086                                            keyopt(cmd_expand(cptr->c_keys[a], 1));
1087                                    scr_printf(" ");
1088                                         }
1089                                         scr_printf("\n");
1090                                 }
1091                         }
1092                 sigcaught = 0;
1093
1094                         scr_printf("\n%s%c ", room_name, room_prompt(room_flags));
1095                         got = 0;
1096                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1097                                 if ((got == 0) && (cmdmatch(cmdbuf, cptr, cmdpos))) {
1098                                         for (a = 0; a < cmdpos; ++a) {
1099                                                 scr_printf("%s ",
1100                                                        cmd_expand(cptr->c_keys[a], 0));
1101                                         }
1102                                         got = 1;
1103                                 }
1104                         }
1105                 }
1106         }
1107
1108 }
1109
1110
1111
1112
1113
1114 /*
1115  * set tty modes.  commands are:
1116  *
1117  * 01- set to Citadel mode
1118  * 2 - save current settings for later restoral
1119  * 3 - restore saved settings
1120  */
1121 #ifdef HAVE_TERMIOS_H
1122 void stty_ctdl(int cmd)
1123 {                               /* SysV version of stty_ctdl() */
1124         struct termios live;
1125         static struct termios saved_settings;
1126         static int last_cmd = 0;
1127
1128         if (cmd == SB_LAST)
1129                 cmd = last_cmd;
1130         else
1131                 last_cmd = cmd;
1132
1133         if ((cmd == 0) || (cmd == 1)) {
1134                 tcgetattr(0, &live);
1135                 live.c_iflag = ISTRIP | IXON | IXANY;
1136                 live.c_oflag = OPOST | ONLCR;
1137                 live.c_lflag = ISIG | NOFLSH;
1138
1139                 live.c_cc[VINTR] = 0;
1140                 live.c_cc[VQUIT] = 0;
1141
1142 #ifdef hpux
1143                 live.c_cc[VMIN] = 0;
1144                 live.c_cc[VTIME] = 0;
1145 #endif
1146
1147                 /* do we even need this stuff anymore? */
1148                 /* live.c_line=0; */
1149                 live.c_cc[VERASE] = 8;
1150                 live.c_cc[VKILL] = 24;
1151                 live.c_cc[VEOF] = 1;
1152                 live.c_cc[VEOL] = 255;
1153                 live.c_cc[VEOL2] = 0;
1154                 live.c_cc[VSTART] = 0;
1155                 tcsetattr(0, TCSADRAIN, &live);
1156         }
1157         if (cmd == 2) {
1158                 tcgetattr(0, &saved_settings);
1159         }
1160         if (cmd == 3) {
1161                 tcsetattr(0, TCSADRAIN, &saved_settings);
1162         }
1163
1164 }
1165 #else
1166 void stty_ctdl(int cmd)
1167 {                               /* BSD version of stty_ctdl() */
1168         struct sgttyb live;
1169         static struct sgttyb saved_settings;
1170         static int last_cmd = 0;
1171
1172         if (cmd == SB_LAST)
1173                 cmd = last_cmd;
1174         else
1175                 last_cmd = cmd;
1176
1177         if ((cmd == 0) || (cmd == 1)) {
1178                 gtty(0, &live);
1179                 live.sg_flags |= CBREAK;
1180                 live.sg_flags |= CRMOD;
1181                 live.sg_flags |= NL1;
1182                 live.sg_flags &= ~ECHO;
1183                 if (cmd == 1)
1184                         live.sg_flags |= NOFLSH;
1185                 stty(0, &live);
1186         }
1187         if (cmd == 2) {
1188                 gtty(0, &saved_settings);
1189         }
1190         if (cmd == 3) {
1191                 stty(0, &saved_settings);
1192         }
1193 }
1194 #endif
1195
1196
1197 /*
1198  * display_help()  -  help file viewer
1199  */
1200 void display_help(CtdlIPC *ipc, char *name)
1201 {
1202         formout(ipc, name);
1203 }
1204
1205
1206 /*
1207  * fmout() - Citadel text formatter and paginator
1208  */
1209 int fmout(
1210         int width,      /* screen width to use */
1211         FILE *fpin,     /* file to read from, or NULL to format given text */
1212         char *text,     /* text to be formatted (when fpin is NULL */
1213         FILE *fpout,    /* file to write to, or NULL to write to screen */
1214         int subst)      /* nonzero if we should use hypertext mode */
1215 {
1216         char *buffer = NULL;    /* The current message */
1217         char *word = NULL;      /* What we are about to actually print */
1218         char *e;                /* Pointer to position in text */
1219         char old = 0;           /* The previous character */
1220         int column = 0;         /* Current column */
1221         size_t i;               /* Generic counter */
1222
1223         /* Space for a single word, which can be at most screenwidth */
1224         word = (char *)calloc(1, width);
1225         if (!word) {
1226                 scr_printf("Can't alloc memory to print message: %s!\n",
1227                                 strerror(errno));
1228                 logoff(NULL, 3);
1229         }
1230
1231         /* Read the entire message body into memory */
1232         if (fpin) {
1233                 buffer = load_message_from_file(fpin);
1234                 if (!buffer) {
1235                         scr_printf("Can't print message: %s!\n",
1236                                         strerror(errno));
1237                         logoff(NULL, 3);
1238                 }
1239         } else {
1240                 buffer = text;
1241         }
1242         e = buffer;
1243
1244         /* Run the message body */
1245         while (*e) {
1246                 /* Catch characters that shouldn't be there at all */
1247                 if (*e == '\r') {
1248                         e++;
1249                         continue;
1250                 }
1251                 /* First, are we looking at a newline? */
1252                 if (*e == '\n') {
1253                         e++;
1254                         if (*e == ' ') {        /* Paragraph */
1255                                 if (fpout) {
1256                                         fprintf(fpout, "\n");
1257                                 } else {
1258                                         scr_printf("\n");
1259                                 }
1260                                 column = 0;
1261                         } else if (old != ' ') {/* Don't print two spaces */
1262                                 if (fpout) {
1263                                         fprintf(fpout, " ");
1264                                 } else {
1265                                         scr_printf(" ");
1266                                 }
1267                                 column++;
1268                         }
1269                         old = '\n';
1270                         continue;
1271                 }
1272
1273                 /* Are we looking at a nonprintable?
1274                  * (This section is now commented out because we could be displaying
1275                  * a character set like UTF-8 or ISO-8859-1.)
1276                 if ( (*e < 32) || (*e > 126) ) {
1277                         e++;
1278                         continue;
1279                 } */
1280
1281                 /* Or are we looking at a space? */
1282                 if (*e == ' ') {
1283                         e++;
1284                         if (column >= width - 1) {
1285                                 /* Are we in the rightmost column? */
1286                                 if (fpout) {
1287                                         fprintf(fpout, "\n");
1288                                 } else {
1289                                         scr_printf("\n");
1290                                 }
1291                                 column = 0;
1292                         } else if (!(column == 0 && old == ' ')) {
1293                                 /* Eat only the first space on a line */
1294                                 if (fpout) {
1295                                         fprintf(fpout, " ");
1296                                 } else {
1297                                         scr_printf(" ");
1298                                 }
1299                                 column++;
1300                         }
1301                         /* ONLY eat the FIRST space on a line */
1302                         old = ' ';
1303                         continue;
1304                 }
1305                 old = *e;
1306
1307                 /* Read a word, slightly messy */
1308                 i = 0;
1309                 while (e[i]) {
1310                         if (!isprint(e[i]) && !isspace(e[i]))
1311                                 e[i] = ' ';
1312                         if (isspace(e[i]))
1313                                 break;
1314                         i++;
1315                 }
1316
1317                 /* We should never see these, but... slightly messy */
1318                 if (e[i] == '\t' || e[i] == '\f' || e[i] == '\v')
1319                         e[i] = ' ';
1320
1321                 /* Break up really long words */
1322                 /* TODO: auto-hyphenation someday? */
1323                 if (i >= width)
1324                         i = width - 1;
1325                 strncpy(word, e, i);
1326                 word[i] = 0;
1327
1328                 /* Decide where to print the word */
1329                 if (column + i >= width) {
1330                         /* Wrap to the next line */
1331                         if (fpout) {
1332                                 fprintf(fpout, "\n");
1333                         } else {
1334                                 scr_printf("\n");
1335                         }
1336                         column = 0;
1337                 }
1338
1339                 /* Print the word */
1340                 if (fpout) {
1341                         fprintf(fpout, "%s", word);
1342                 } else {
1343                         scr_printf("%s", word);
1344                 }
1345                 column += i;
1346                 e += i;         /* Start over with the whitepsace! */
1347         }
1348
1349         free(word);
1350         if (fpin)               /* We allocated this, remember? */
1351                 free(buffer);
1352
1353         /* Is this necessary?  It makes the output kind of spacey. */
1354         if (fpout) {
1355                 fprintf(fpout, "\n");
1356         } else {
1357                 scr_printf("\n");
1358         }
1359
1360         return sigcaught;
1361 }
1362
1363
1364 /*
1365  * support ANSI color if defined
1366  */
1367 void color(int colornum)
1368 {
1369         static int hold_color;
1370         static int current_color;
1371
1372         if (colornum == COLOR_PUSH) {
1373                 hold_color = current_color;
1374                 return;
1375         }
1376
1377         if (colornum == COLOR_POP) {
1378                 color(hold_color);
1379                 return;
1380         }
1381
1382         current_color = colornum;
1383         if (enable_color) {
1384                 /* When switching to dim white, actually output an 'original
1385                  * pair' sequence -- this looks better on black-on-white
1386                  * terminals. - Changed to ORIGINAL_PAIR as this actually
1387                  * wound up looking horrible on black-on-white terminals, not
1388                  * to mention transparent terminals.
1389                  */
1390                 if (colornum == ORIGINAL_PAIR)
1391                         printf("\033[0;39;49m");
1392                 else
1393                         printf("\033[%d;3%d;4%dm",
1394                                         (colornum & 8) ? 1 : 0,
1395                                         (colornum & 7),
1396                                         rc_color_use_bg);
1397
1398         }
1399 }
1400
1401 void cls(int colornum)
1402 {
1403         if (enable_color) {
1404                 printf("\033[4%dm\033[2J\033[H\033[0m",
1405                                 colornum ? colornum : rc_color_use_bg);
1406         }
1407 }
1408
1409
1410 /*
1411  * Detect whether ANSI color is available (answerback)
1412  */
1413 void send_ansi_detect(void)
1414 {
1415         if (rc_ansi_color == 2) {
1416                 printf("\033[c");
1417                 scr_flush();
1418                 time(&AnsiDetect);
1419         }
1420 }
1421
1422 void look_for_ansi(void)
1423 {
1424         fd_set rfds;
1425         struct timeval tv;
1426         char abuf[512];
1427         time_t now;
1428         int a, rv;
1429
1430         if (rc_ansi_color == 0) {
1431                 enable_color = 0;
1432         } else if (rc_ansi_color == 1) {
1433                 enable_color = 1;
1434         } else if (rc_ansi_color == 2) {
1435
1436                 /* otherwise, do the auto-detect */
1437
1438                 strcpy(abuf, "");
1439
1440                 time(&now);
1441                 if ((now - AnsiDetect) < 2)
1442                         sleep(1);
1443
1444                 do {
1445                         FD_ZERO(&rfds);
1446                         FD_SET(0, &rfds);
1447                         tv.tv_sec = 0;
1448                         tv.tv_usec = 1;
1449
1450                         select(1, &rfds, NULL, NULL, &tv);
1451                         if (FD_ISSET(0, &rfds)) {
1452                                 abuf[strlen(abuf) + 1] = 0;
1453                                 rv = read(0, &abuf[strlen(abuf)], 1);
1454                                 if (rv < 0) {
1455                                         scr_printf("failed to read after select: %s",
1456                                                    strerror(errno));
1457                                         break;
1458                                 }
1459                         }
1460                 } while (FD_ISSET(0, &rfds));
1461
1462                 for (a = 0; !IsEmptyStr(&abuf[a]); ++a) {
1463                         if ((abuf[a] == 27) && (abuf[a + 1] == '[')
1464                             && (abuf[a + 2] == '?')) {
1465                                 enable_color = 1;
1466                         }
1467                 }
1468         }
1469 }
1470
1471
1472 /*
1473  * Display key options (highlight hotkeys inside angle brackets)
1474  */
1475 void keyopt(char *buf) {
1476         int i;
1477
1478         color(DIM_WHITE);
1479         for (i=0; !IsEmptyStr(&buf[i]); ++i) {
1480                 if (buf[i]=='<') {
1481                         scr_printf("%c", buf[i]);
1482                         color(BRIGHT_MAGENTA);
1483                 } else {
1484                         if (buf[i]=='>'&& buf[i+1] != '>') {
1485                                 color(DIM_WHITE);
1486                         }
1487                         scr_printf("%c", buf[i]);
1488                 }
1489         }
1490         color(DIM_WHITE);
1491 }
1492
1493
1494
1495 /*
1496  * Present a key-menu line choice type of thing
1497  */
1498 char keymenu(char *menuprompt, char *menustring) {
1499         int i, c, a;
1500         int choices;
1501         int do_prompt = 0;
1502         char buf[1024];
1503         int ch;
1504         int display_prompt = 1;
1505
1506         choices = num_tokens(menustring, '|');
1507
1508         if (menuprompt != NULL) do_prompt = 1;
1509         if ((menuprompt != NULL) && (IsEmptyStr(menuprompt))) do_prompt = 0;
1510
1511         while (1) {
1512                 if (display_prompt) {
1513                         if (do_prompt) {
1514                                 scr_printf("%s ", menuprompt);
1515                         }
1516                         else {
1517                                 for (i=0; i<choices; ++i) {
1518                                         extract_token(buf, menustring, i, '|', sizeof buf);
1519                                         keyopt(buf);
1520                                         scr_printf(" ");
1521                                 }
1522                         }
1523                         scr_printf("-> ");
1524                         display_prompt = 0;
1525                 }
1526                 ch = lkey();
1527
1528                 if ( (do_prompt) && (ch=='?') ) {
1529                         scr_printf("\rOne of...                               ");
1530                         scr_printf("                                      \n");
1531                         for (i=0; i<choices; ++i) {
1532                                 extract_token(buf, menustring, i, '|', sizeof buf);
1533                                 scr_printf("   ");
1534                                 keyopt(buf);
1535                                 scr_printf("\n");
1536                         }
1537                         scr_printf("\n");
1538                         display_prompt = 1;
1539                 }
1540
1541                 for (i=0; i<choices; ++i) {
1542                         extract_token(buf, menustring, i, '|', sizeof buf);
1543                         for (c=1; !IsEmptyStr(&buf[c]); ++c) {
1544                                 if ( (ch == tolower(buf[c]))
1545                                    && (buf[c-1]=='<')
1546                                    && (buf[c+1]=='>') ) {
1547                                         for (a=0; !IsEmptyStr(&buf[a]); ++a) {
1548                                                 if ( (a!=(c-1)) && (a!=(c+1))) {
1549                                                         scr_putc(buf[a]);
1550                                                 }
1551                                         }
1552                                         scr_printf("\n");
1553                                         return ch;
1554                                 }
1555                         }
1556                 }
1557         }
1558 }