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 /*
 491  * Function to read a line of text from the terminal.
 492  *
 493  * string               Pointer to string buffer
 494  * lim                  Maximum length - if negative, echo asterisks instead of characters
 495  */
 496 void ctdl_getline(char *string, int lim)
 497 {
 498         int a, b;
 499         char noshow = 0;
 500
 501         if (lim < 0) {
 502                 lim = (0 - lim);
 503                 noshow = 1;
 504         }
 505         strcpy(string, "");
 506         gl_string = string;
 507         async_ka_start();
 508
 509 GLA:    a = inkey();
 510         if ((a == 8 || a == 23) && (IsEmptyStr(string)))
 511                 goto GLA;
 512         if ((a != 10) && (a != 8) && (strlen(string) == lim))
 513                 goto GLA;
 514         if ((a == 8) && (string[0] != 0)) {
 515                 string[strlen(string) - 1] = 0;
 516                 scr_putc(8); scr_putc(32); scr_putc(8);
 517                 goto GLA;
 518         }
 519         if ((a == 23) && (string[0] != 0)) {
 520                 do {
 521                         string[strlen(string) - 1] = 0;
 522                         scr_putc(8); scr_putc(32); scr_putc(8);
 523                 } while (!IsEmptyStr(string) && string[strlen(string) - 1] != ' ');
 524                 goto GLA;
 525         }
 526         if ((a == 10)) {
 527                 scr_putc(10);
 528                 async_ka_end();
 529                 return;
 530         }
 531         if (a < 32) {
 532                 a = '.';
 533         }
 534         b = strlen(string);
 535         string[b] = a;
 536         string[b + 1] = 0;
 537         if (noshow) {
 538                 scr_putc('*');
 539         }
 540         else {
 541                 scr_putc(a);
 542         }
 543         goto GLA;
 544 }
 545
 546
 547 /*
 548  * strprompt()  -  prompt for a string, print the existing value and
 549  *                 allow the user to press return to keep it...
 550  */
 551 void strprompt(char *prompt, char *str, int len)
 552 {
 553         int i;
 554         char buf[128];
 555
 556         print_instant();
 557         color(DIM_WHITE);
 558         scr_printf("%s ", prompt);
 559         color(DIM_MAGENTA);
 560         scr_printf("[");
 561         color(BRIGHT_MAGENTA);
 562
 563         if (len >= 0) {
 564                 scr_printf("%s", str);
 565         }
 566         else {
 567                 for (i=0; !IsEmptyStr(&str[i]); ++i) {
 568                         scr_printf("*");
 569                 }
 570         }
 571
 572         color(DIM_MAGENTA);
 573         scr_printf("]");
 574         color(DIM_WHITE);
 575         scr_printf(": ");
 576         color(BRIGHT_CYAN);
 577         ctdl_getline(buf, len);
 578         if (buf[0] != 0) {
 579                 strcpy(str, buf);
 580         }
 581         color(DIM_WHITE);
 582 }
 583
 584 /*
 585  * boolprompt()  -  prompt for a yes/no, print the existing value and
 586  *                  allow the user to press return to keep it...
 587  */
 588 int boolprompt(char *prompt, int prev_val)
 589 {
 590         int r;
 591
 592         color(DIM_WHITE);
 593         scr_printf("%s ", prompt);
 594         color(DIM_MAGENTA);
 595         scr_printf("[");
 596         color(BRIGHT_MAGENTA);
 597         scr_printf("%s", (prev_val ? "Yes" : "No"));
 598         color(DIM_MAGENTA);
 599         scr_printf("]: ");
 600         color(BRIGHT_CYAN);
 601         r = (yesno_d(prev_val));
 602         color(DIM_WHITE);
 603         return r;
 604 }
 605
 606 /*
 607  * intprompt()  -  like strprompt(), except for an integer
 608  *                 (note that it RETURNS the new value!)
 609  */
 610 int intprompt(char *prompt, int ival, int imin, int imax)
 611 {
 612         char buf[16];
 613         int i;
 614         int p;
 615
 616         do {
 617                 i = ival;
 618                 snprintf(buf, sizeof buf, "%d", i);
 619                 strprompt(prompt, buf, 15);
 620                 i = atoi(buf);
 621                 for (p=0; !IsEmptyStr(&buf[p]); ++p) {
 622                         if ( (!isdigit(buf[p]))
 623                            && ( (buf[p]!='-') || (p!=0) )  )
 624                                 i = imin - 1;
 625                 }
 626                 if (i < imin)
 627                         scr_printf("*** Must be no less than %d.\n", imin);
 628                 if (i > imax)
 629                         scr_printf("*** Must be no more than %d.\n", imax);
 630         } while ((i < imin) || (i > imax));
 631         return (i);
 632 }
 633
 634 /*
 635  * newprompt()  -  prompt for a string with no existing value
 636  *                 (clears out string buffer first)
 637  */
 638 void newprompt(char *prompt, char *str, int len)
 639 {
 640         str[0] = 0;
 641         color(BRIGHT_MAGENTA);
 642         scr_printf("%s", prompt);
 643         color(DIM_MAGENTA);
 644         ctdl_getline(str, len);
 645         color(DIM_WHITE);
 646 }
 647
 648
 649 int lkey(void)
 650 {                               /* returns a lower case value */
 651         int a;
 652         a = inkey();
 653         if (isupper(a))
 654                 a = tolower(a);
 655         return (a);
 656 }
 657
 658 /*
 659  * parse the citadel.rc file
 660  */
 661 void load_command_set(void)
 662 {
 663         FILE *ccfile;
 664         char buf[1024];
 665         struct citcmd *cptr;
 666         struct citcmd *lastcmd = NULL;
 667         int a, d;
 668         int b = 0;
 669
 670         /* first, set up some defaults for non-required variables */
 671
 672         strcpy(editor_path, "");
 673         strcpy(printcmd, "");
 674         strcpy(imagecmd, "");
 675         strcpy(rc_username, "");
 676         strcpy(rc_password, "");
 677         rc_floor_mode = 0;
 678         rc_exp_beep = 1;
 679         rc_allow_attachments = 0;
 680         rc_remember_passwords = 0;
 681         strcpy(rc_exp_cmd, "");
 682         rc_display_message_numbers = 0;
 683         rc_force_mail_prompts = 0;
 684         rc_ansi_color = 0;
 685         rc_color_use_bg = 0;
 686         strcpy(rc_url_cmd, "");
 687         strcpy(rc_open_cmd, "");
 688         strcpy(rc_gotmail_cmd, "");
 689 #ifdef HAVE_OPENSSL
 690         rc_encrypt = RC_DEFAULT;
 691 #endif
 692
 693         /* now try to open the citadel.rc file */
 694
 695         ccfile = NULL;
 696         if (getenv("HOME") != NULL) {
 697                 snprintf(buf, sizeof buf, "%s/.citadelrc", getenv("HOME"));
 698                 ccfile = fopen(buf, "r");
 699         }
 700         if (ccfile == NULL) {
 701                 ccfile = fopen(file_citadel_rc, "r");
 702         }
 703         if (ccfile == NULL) {
 704                 ccfile = fopen("/etc/citadel.rc", "r");
 705         }
 706         if (ccfile == NULL) {
 707                 ccfile = fopen("./citadel.rc", "r");
 708         }
 709         if (ccfile == NULL) {
 710                 perror("commands: cannot open citadel.rc");
 711                 logoff(NULL, 3);
 712         }
 713         while (fgets(buf, sizeof buf, ccfile) != NULL) {
 714                 while ((!IsEmptyStr(buf)) ? (isspace(buf[strlen(buf) - 1])) : 0)
 715                         buf[strlen(buf) - 1] = 0;
 716
 717                 if (!strncasecmp(buf, "encrypt=", 8)) {
 718                         if (!strcasecmp(&buf[8], "yes")) {
 719 #ifdef HAVE_OPENSSL
 720                                 rc_encrypt = RC_YES;
 721 #else
 722                                 fprintf(stderr, "citadel.rc requires encryption support but citadel is not compiled with OpenSSL");
 723                                 logoff(NULL, 3);
 724 #endif
 725                         }
 726 #ifdef HAVE_OPENSSL
 727                         else if (!strcasecmp(&buf[8], "no")) {
 728                                 rc_encrypt = RC_NO;
 729                         }
 730                         else if (!strcasecmp(&buf[8], "default")) {
 731                                 rc_encrypt = RC_DEFAULT;
 732                         }
 733 #endif
 734                 }
 735
 736                 if (!strncasecmp(buf, "editor=", 7)) {
 737                         strcpy(editor_path, &buf[7]);
 738                 }
 739
 740                 if (!strncasecmp(buf, "printcmd=", 9))
 741                         strcpy(printcmd, &buf[9]);
 742
 743                 if (!strncasecmp(buf, "imagecmd=", 9))
 744                         strcpy(imagecmd, &buf[9]);
 745
 746                 if (!strncasecmp(buf, "expcmd=", 7))
 747                         strcpy(rc_exp_cmd, &buf[7]);
 748
 749                 if (!strncasecmp(buf, "use_floors=", 11)) {
 750                         if (!strcasecmp(&buf[11], "yes"))
 751                                 rc_floor_mode = RC_YES;
 752                         if (!strcasecmp(&buf[11], "no"))
 753                                 rc_floor_mode = RC_NO;
 754                         if (!strcasecmp(&buf[11], "default"))
 755                                 rc_floor_mode = RC_DEFAULT;
 756                 }
 757                 if (!strncasecmp(buf, "beep=", 5)) {
 758                         rc_exp_beep = atoi(&buf[5]);
 759                 }
 760                 if (!strncasecmp(buf, "allow_attachments=", 18)) {
 761                         rc_allow_attachments = atoi(&buf[18]);
 762                 }
 763                 if (!strncasecmp(buf, "idle_threshold=", 15)) {
 764                         rc_idle_threshold = atol(&buf[15]);
 765                 }
 766                 if (!strncasecmp(buf, "remember_passwords=", 19)) {
 767                         rc_remember_passwords = atoi(&buf[19]);
 768                 }
 769                 if (!strncasecmp(buf, "display_message_numbers=", 24)) {
 770                         rc_display_message_numbers = atoi(&buf[24]);
 771                 }
 772                 if (!strncasecmp(buf, "force_mail_prompts=", 19)) {
 773                         rc_force_mail_prompts = atoi(&buf[19]);
 774                 }
 775                 if (!strncasecmp(buf, "ansi_color=", 11)) {
 776                         if (!strncasecmp(&buf[11], "on", 2))
 777                                 rc_ansi_color = 1;
 778                         if (!strncasecmp(&buf[11], "auto", 4))
 779                                 rc_ansi_color = 2;      /* autodetect */
 780                         if (!strncasecmp(&buf[11], "user", 4))
 781                                 rc_ansi_color = 3;      /* user config */
 782                 }
 783                 if (!strncasecmp(buf, "status_line=", 12)) {
 784                         if (!strncasecmp(&buf[12], "on", 2))
 785                                 enable_status_line = 1;
 786                 }
 787                 if (!strncasecmp(buf, "use_background=", 15)) {
 788                         if (!strncasecmp(&buf[15], "on", 2))
 789                                 rc_color_use_bg = 9;
 790                 }
 791                 if (!strncasecmp(buf, "prompt_control=", 15)) {
 792                         if (!strncasecmp(&buf[15], "on", 2))
 793                                 rc_prompt_control = 1;
 794                         if (!strncasecmp(&buf[15], "user", 4))
 795                                 rc_prompt_control = 3;  /* user config */
 796                 }
 797                 if (!strncasecmp(buf, "username=", 9))
 798                         strcpy(rc_username, &buf[9]);
 799
 800                 if (!strncasecmp(buf, "password=", 9))
 801                         strcpy(rc_password, &buf[9]);
 802
 803                 if (!strncasecmp(buf, "urlcmd=", 7))
 804                         strcpy(rc_url_cmd, &buf[7]);
 805
 806                 if (!strncasecmp(buf, "opencmd=", 7))
 807                         strcpy(rc_open_cmd, &buf[8]);
 808
 809                 if (!strncasecmp(buf, "gotmailcmd=", 11))
 810                         strcpy(rc_gotmail_cmd, &buf[11]);
 811
 812                 if (!strncasecmp(buf, "cmd=", 4)) {
 813                         strcpy(buf, &buf[4]);
 814
 815                         cptr = (struct citcmd *) malloc(sizeof(struct citcmd));
 816
 817                         cptr->c_cmdnum = atoi(buf);
 818                         for (d = strlen(buf); d >= 0; --d)
 819                                 if (buf[d] == ',')
 820                                         b = d;
 821                         strcpy(buf, &buf[b + 1]);
 822
 823                         cptr->c_axlevel = atoi(buf);
 824                         for (d = strlen(buf); d >= 0; --d)
 825                                 if (buf[d] == ',')
 826                                         b = d;
 827                         strcpy(buf, &buf[b + 1]);
 828
 829                         for (a = 0; a < 5; ++a)
 830                                 cptr->c_keys[a][0] = 0;
 831
 832                         a = 0;
 833                         b = 0;
 834                         buf[strlen(buf) + 1] = 0;
 835                         while (!IsEmptyStr(buf)) {
 836                                 b = strlen(buf);
 837                                 for (d = strlen(buf); d >= 0; --d)
 838                                         if (buf[d] == ',')
 839                                                 b = d;
 840                                 strncpy(cptr->c_keys[a], buf, b);
 841                                 cptr->c_keys[a][b] = 0;
 842                                 if (buf[b] == ',')
 843                                         strcpy(buf, &buf[b + 1]);
 844                                 else
 845                                         strcpy(buf, "");
 846                                 ++a;
 847                         }
 848
 849                         cptr->next = NULL;
 850                         if (cmdlist == NULL)
 851                                 cmdlist = cptr;
 852                         else
 853                                 lastcmd->next = cptr;
 854                         lastcmd = cptr;
 855                 }
 856         }
 857         fclose(ccfile);
 858 }
 859
 860
 861
 862 /*
 863  * return the key associated with a command
 864  */
 865 char keycmd(char *cmdstr)
 866 {
 867         int a;
 868
 869         for (a = 0; !IsEmptyStr(&cmdstr[a]); ++a)
 870                 if (cmdstr[a] == '&')
 871                         return (tolower(cmdstr[a + 1]));
 872         return (0);
 873 }
 874
 875
 876 /*
 877  * Output the string from a key command without the ampersand
 878  * "mode" should be set to 0 for normal or 1 for <C>ommand key highlighting
 879  */
 880 char *cmd_expand(char *strbuf, int mode)
 881 {
 882         int a;
 883         static char exp[64];
 884         char buf[1024];
 885
 886         strcpy(exp, strbuf);
 887
 888         for (a = 0; exp[a]; ++a) {
 889                 if (strbuf[a] == '&') {
 890
 891                         /* dont echo these non mnemonic command keys */
 892                         int noecho = strbuf[a+1] == '<' || strbuf[a+1] == '>' || strbuf[a+1] == '+' || strbuf[a+1] == '-';
 893
 894                         if (mode == 0) {
 895                                 strcpy(&exp[a], &exp[a + 1 + noecho]);
 896                         }
 897                         if (mode == 1) {
 898                                 exp[a] = '<';
 899                                 strcpy(buf, &exp[a + 2]);
 900                                 exp[a + 2] = '>';
 901                                 exp[a + 3] = 0;
 902                                 strcat(exp, buf);
 903                         }
 904                 }
 905                 if (!strncmp(&exp[a], "^r", 2)) {
 906                         strcpy(buf, exp);
 907                         strcpy(&exp[a], room_name);
 908                         strcat(exp, &buf[a + 2]);
 909                 }
 910                 if (!strncmp(&exp[a], "^c", 2)) {
 911                         exp[a] = ',';
 912                         strcpy(&exp[a + 1], &exp[a + 2]);
 913                 }
 914         }
 915
 916         return (exp);
 917 }
 918
 919
 920
 921 /*
 922  * Comparison function to determine if entered commands match a
 923  * command loaded from the config file.
 924  */
 925 int cmdmatch(char *cmdbuf, struct citcmd *cptr, int ncomp)
 926 {
 927         int a;
 928         int cmdax;
 929
 930         cmdax = 0;
 931         if (is_room_aide)
 932                 cmdax = 1;
 933         if (axlevel >= 6)
 934                 cmdax = 2;
 935
 936         for (a = 0; a < ncomp; ++a) {
 937                 if ((tolower(cmdbuf[a]) != keycmd(cptr->c_keys[a]))
 938                     || (cptr->c_axlevel > cmdax))
 939                         return (0);
 940         }
 941         return (1);
 942 }
 943
 944
 945 /*
 946  * This function returns 1 if a given command requires a string input
 947  */
 948 int requires_string(struct citcmd *cptr, int ncomp)
 949 {
 950         int a;
 951         char buf[64];
 952
 953         strcpy(buf, cptr->c_keys[ncomp - 1]);
 954         for (a = 0; !IsEmptyStr(&buf[a]); ++a) {
 955                 if (buf[a] == ':')
 956                         return (1);
 957         }
 958         return (0);
 959 }
 960
 961
 962 /*
 963  * Input a command at the main prompt.
 964  * This function returns an integer command number.  If the command prompts
 965  * for a string then it is placed in the supplied buffer.
 966  */
 967 int getcmd(CtdlIPC *ipc, char *argbuf)
 968 {
 969         char cmdbuf[5];
 970         int cmdspaces[5];
 971         int cmdpos;
 972         int ch;
 973         int a;
 974         int got;
 975         int this_lazy_cmd;
 976         struct citcmd *cptr;
 977
 978         /*
 979          * Starting a new command now, so set sigcaught to 0.  This variable
 980          * is set to nonzero (usually NEXT_KEY or STOP_KEY) if a command has
 981          * been interrupted by a keypress.
 982          */
 983         sigcaught = 0;
 984
 985         /* Switch color support on or off if we're in user mode */
 986         if (rc_ansi_color == 3) {
 987                 if (userflags & US_COLOR)
 988                         enable_color = 1;
 989                 else
 990                         enable_color = 0;
 991         }
 992         /* if we're running in idiot mode, display a cute little menu */
 993         IFNEXPERT formout(ipc, "mainmenu");
 994
 995         print_instant();
 996         strcpy(argbuf, "");
 997         cmdpos = 0;
 998         for (a = 0; a < 5; ++a)
 999                 cmdbuf[a] = 0;
1000         /* now the room prompt... */
1001         ok_to_interrupt = 1;
1002         color(BRIGHT_WHITE);
1003         scr_printf("\n%s", room_name);
1004         color(DIM_WHITE);
1005         scr_printf("%c ", room_prompt(room_flags));
1006
1007         while (1) {
1008                 ch = inkey();
1009                 ok_to_interrupt = 0;
1010
1011                 /* Handle the backspace key, but only if there's something
1012                  * to backspace over...
1013                  */
1014                 if ((ch == 8) && (cmdpos > 0)) {
1015                         back(cmdspaces[cmdpos - 1] + 1);
1016                         cmdbuf[cmdpos] = 0;
1017                         --cmdpos;
1018                 }
1019                 /* Spacebar invokes "lazy traversal" commands */
1020                 if ((ch == 32) && (cmdpos == 0)) {
1021                         this_lazy_cmd = next_lazy_cmd;
1022                         if (this_lazy_cmd == 13)
1023                                 next_lazy_cmd = 5;
1024                         if (this_lazy_cmd == 5)
1025                                 next_lazy_cmd = 13;
1026                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1027                                 if (cptr->c_cmdnum == this_lazy_cmd) {
1028                                         for (a = 0; a < 5; ++a)
1029                                                 if (cptr->c_keys[a][0] != 0)
1030                                                         scr_printf("%s ", cmd_expand(
1031                                                                                         cptr->c_keys[a], 0));
1032                                         scr_printf("\n");
1033                                         return (this_lazy_cmd);
1034                                 }
1035                         }
1036                         scr_printf("\n");
1037                         return (this_lazy_cmd);
1038                 }
1039                 /* Otherwise, process the command */
1040                 cmdbuf[cmdpos] = tolower(ch);
1041
1042                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1043                         if (cmdmatch(cmdbuf, cptr, cmdpos + 1)) {
1044
1045                                 scr_printf("%s", cmd_expand(cptr->c_keys[cmdpos], 0));
1046                                 cmdspaces[cmdpos] = strlen(
1047                                     cmd_expand(cptr->c_keys[cmdpos], 0));
1048                                 if (cmdpos < 4)
1049                                         if ((cptr->c_keys[cmdpos + 1]) != 0)
1050                                                 scr_putc(' ');
1051                                 ++cmdpos;
1052                         }
1053                 }
1054
1055                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1056                         if (cmdmatch(cmdbuf, cptr, 5)) {
1057                                 /* We've found our command. */
1058                                 if (requires_string(cptr, cmdpos)) {
1059                                         argbuf[0] = 0;
1060                                         ctdl_getline(argbuf, 64);
1061                                 } else {
1062                                         scr_printf("\n");
1063                                 }
1064
1065                                 /* If this command is one that changes rooms,
1066                                  * then the next lazy-command (space bar)
1067                                  * should be "read new" instead of "goto"
1068                                  */
1069                                 if ((cptr->c_cmdnum == 5)
1070                                     || (cptr->c_cmdnum == 6)
1071                                     || (cptr->c_cmdnum == 47)
1072                                     || (cptr->c_cmdnum == 52)
1073                                     || (cptr->c_cmdnum == 16)
1074                                     || (cptr->c_cmdnum == 20))
1075                                         next_lazy_cmd = 13;
1076
1077                                 /* If this command is "read new"
1078                                  * then the next lazy-command (space bar)
1079                                  * should be "goto"
1080                                  */
1081                                 if (cptr->c_cmdnum == 13)
1082                                         next_lazy_cmd = 5;
1083
1084                                 return (cptr->c_cmdnum);
1085
1086                         }
1087                 }
1088
1089                 if (ch == '?') {
1090                         scr_printf("\rOne of ...                         \n");
1091                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1092                                 if (cmdmatch(cmdbuf, cptr, cmdpos)) {
1093                                         for (a = 0; a < 5; ++a) {
1094                                            keyopt(cmd_expand(cptr->c_keys[a], 1));
1095                                    scr_printf(" ");
1096                                         }
1097                                         scr_printf("\n");
1098                                 }
1099                         }
1100                 sigcaught = 0;
1101
1102                         scr_printf("\n%s%c ", room_name, room_prompt(room_flags));
1103                         got = 0;
1104                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1105                                 if ((got == 0) && (cmdmatch(cmdbuf, cptr, cmdpos))) {
1106                                         for (a = 0; a < cmdpos; ++a) {
1107                                                 scr_printf("%s ",
1108                                                        cmd_expand(cptr->c_keys[a], 0));
1109                                         }
1110                                         got = 1;
1111                                 }
1112                         }
1113                 }
1114         }
1115
1116 }
1117
1118
1119
1120
1121
1122 /*
1123  * set tty modes.  commands are:
1124  *
1125  * 01- set to Citadel mode
1126  * 2 - save current settings for later restoral
1127  * 3 - restore saved settings
1128  */
1129 #ifdef HAVE_TERMIOS_H
1130 void stty_ctdl(int cmd)
1131 {                               /* SysV version of stty_ctdl() */
1132         struct termios live;
1133         static struct termios saved_settings;
1134         static int last_cmd = 0;
1135
1136         if (cmd == SB_LAST)
1137                 cmd = last_cmd;
1138         else
1139                 last_cmd = cmd;
1140
1141         if ((cmd == 0) || (cmd == 1)) {
1142                 tcgetattr(0, &live);
1143                 live.c_iflag = ISTRIP | IXON | IXANY;
1144                 live.c_oflag = OPOST | ONLCR;
1145                 live.c_lflag = ISIG | NOFLSH;
1146
1147                 live.c_cc[VINTR] = 0;
1148                 live.c_cc[VQUIT] = 0;
1149
1150 #ifdef hpux
1151                 live.c_cc[VMIN] = 0;
1152                 live.c_cc[VTIME] = 0;
1153 #endif
1154
1155                 /* do we even need this stuff anymore? */
1156                 /* live.c_line=0; */
1157                 live.c_cc[VERASE] = 8;
1158                 live.c_cc[VKILL] = 24;
1159                 live.c_cc[VEOF] = 1;
1160                 live.c_cc[VEOL] = 255;
1161                 live.c_cc[VEOL2] = 0;
1162                 live.c_cc[VSTART] = 0;
1163                 tcsetattr(0, TCSADRAIN, &live);
1164         }
1165         if (cmd == 2) {
1166                 tcgetattr(0, &saved_settings);
1167         }
1168         if (cmd == 3) {
1169                 tcsetattr(0, TCSADRAIN, &saved_settings);
1170         }
1171
1172 }
1173 #else
1174 void stty_ctdl(int cmd)
1175 {                               /* BSD version of stty_ctdl() */
1176         struct sgttyb live;
1177         static struct sgttyb saved_settings;
1178         static int last_cmd = 0;
1179
1180         if (cmd == SB_LAST)
1181                 cmd = last_cmd;
1182         else
1183                 last_cmd = cmd;
1184
1185         if ((cmd == 0) || (cmd == 1)) {
1186                 gtty(0, &live);
1187                 live.sg_flags |= CBREAK;
1188                 live.sg_flags |= CRMOD;
1189                 live.sg_flags |= NL1;
1190                 live.sg_flags &= ~ECHO;
1191                 if (cmd == 1)
1192                         live.sg_flags |= NOFLSH;
1193                 stty(0, &live);
1194         }
1195         if (cmd == 2) {
1196                 gtty(0, &saved_settings);
1197         }
1198         if (cmd == 3) {
1199                 stty(0, &saved_settings);
1200         }
1201 }
1202 #endif
1203
1204
1205 /*
1206  * display_help()  -  help file viewer
1207  */
1208 void display_help(CtdlIPC *ipc, char *name)
1209 {
1210         formout(ipc, name);
1211 }
1212
1213
1214 /*
1215  * fmout() - Citadel text formatter and paginator
1216  */
1217 int fmout(
1218         int width,      /* screen width to use */
1219         FILE *fpin,     /* file to read from, or NULL to format given text */
1220         char *text,     /* text to be formatted (when fpin is NULL */
1221         FILE *fpout,    /* file to write to, or NULL to write to screen */
1222         int subst)      /* nonzero if we should use hypertext mode */
1223 {
1224         char *buffer = NULL;    /* The current message */
1225         char *word = NULL;      /* What we are about to actually print */
1226         char *e;                /* Pointer to position in text */
1227         char old = 0;           /* The previous character */
1228         int column = 0;         /* Current column */
1229         size_t i;               /* Generic counter */
1230
1231         /* Space for a single word, which can be at most screenwidth */
1232         word = (char *)calloc(1, width);
1233         if (!word) {
1234                 scr_printf("Can't alloc memory to print message: %s!\n",
1235                                 strerror(errno));
1236                 logoff(NULL, 3);
1237         }
1238
1239         /* Read the entire message body into memory */
1240         if (fpin) {
1241                 buffer = load_message_from_file(fpin);
1242                 if (!buffer) {
1243                         scr_printf("Can't print message: %s!\n",
1244                                         strerror(errno));
1245                         logoff(NULL, 3);
1246                 }
1247         } else {
1248                 buffer = text;
1249         }
1250         e = buffer;
1251
1252         /* Run the message body */
1253         while (*e) {
1254                 /* Catch characters that shouldn't be there at all */
1255                 if (*e == '\r') {
1256                         e++;
1257                         continue;
1258                 }
1259                 /* First, are we looking at a newline? */
1260                 if (*e == '\n') {
1261                         e++;
1262                         if (*e == ' ') {        /* Paragraph */
1263                                 if (fpout) {
1264                                         fprintf(fpout, "\n");
1265                                 } else {
1266                                         scr_printf("\n");
1267                                 }
1268                                 column = 0;
1269                         } else if (old != ' ') {/* Don't print two spaces */
1270                                 if (fpout) {
1271                                         fprintf(fpout, " ");
1272                                 } else {
1273                                         scr_printf(" ");
1274                                 }
1275                                 column++;
1276                         }
1277                         old = '\n';
1278                         continue;
1279                 }
1280
1281                 /* Are we looking at a nonprintable?
1282                  * (This section is now commented out because we could be displaying
1283                  * a character set like UTF-8 or ISO-8859-1.)
1284                 if ( (*e < 32) || (*e > 126) ) {
1285                         e++;
1286                         continue;
1287                 } */
1288
1289                 /* Or are we looking at a space? */
1290                 if (*e == ' ') {
1291                         e++;
1292                         if (column >= width - 1) {
1293                                 /* Are we in the rightmost column? */
1294                                 if (fpout) {
1295                                         fprintf(fpout, "\n");
1296                                 } else {
1297                                         scr_printf("\n");
1298                                 }
1299                                 column = 0;
1300                         } else if (!(column == 0 && old == ' ')) {
1301                                 /* Eat only the first space on a line */
1302                                 if (fpout) {
1303                                         fprintf(fpout, " ");
1304                                 } else {
1305                                         scr_printf(" ");
1306                                 }
1307                                 column++;
1308                         }
1309                         /* ONLY eat the FIRST space on a line */
1310                         old = ' ';
1311                         continue;
1312                 }
1313                 old = *e;
1314
1315                 /* Read a word, slightly messy */
1316                 i = 0;
1317                 while (e[i]) {
1318                         if (!isprint(e[i]) && !isspace(e[i]))
1319                                 e[i] = ' ';
1320                         if (isspace(e[i]))
1321                                 break;
1322                         i++;
1323                 }
1324
1325                 /* We should never see these, but... slightly messy */
1326                 if (e[i] == '\t' || e[i] == '\f' || e[i] == '\v')
1327                         e[i] = ' ';
1328
1329                 /* Break up really long words */
1330                 /* TODO: auto-hyphenation someday? */
1331                 if (i >= width)
1332                         i = width - 1;
1333                 strncpy(word, e, i);
1334                 word[i] = 0;
1335
1336                 /* Decide where to print the word */
1337                 if (column + i >= width) {
1338                         /* Wrap to the next line */
1339                         if (fpout) {
1340                                 fprintf(fpout, "\n");
1341                         } else {
1342                                 scr_printf("\n");
1343                         }
1344                         column = 0;
1345                 }
1346
1347                 /* Print the word */
1348                 if (fpout) {
1349                         fprintf(fpout, "%s", word);
1350                 } else {
1351                         scr_printf("%s", word);
1352                 }
1353                 column += i;
1354                 e += i;         /* Start over with the whitepsace! */
1355         }
1356
1357         free(word);
1358         if (fpin)               /* We allocated this, remember? */
1359                 free(buffer);
1360
1361         /* Is this necessary?  It makes the output kind of spacey. */
1362         if (fpout) {
1363                 fprintf(fpout, "\n");
1364         } else {
1365                 scr_printf("\n");
1366         }
1367
1368         return sigcaught;
1369 }
1370
1371
1372 /*
1373  * support ANSI color if defined
1374  */
1375 void color(int colornum)
1376 {
1377         static int hold_color;
1378         static int current_color;
1379
1380         if (colornum == COLOR_PUSH) {
1381                 hold_color = current_color;
1382                 return;
1383         }
1384
1385         if (colornum == COLOR_POP) {
1386                 color(hold_color);
1387                 return;
1388         }
1389
1390         current_color = colornum;
1391         if (enable_color) {
1392                 /* When switching to dim white, actually output an 'original
1393                  * pair' sequence -- this looks better on black-on-white
1394                  * terminals. - Changed to ORIGINAL_PAIR as this actually
1395                  * wound up looking horrible on black-on-white terminals, not
1396                  * to mention transparent terminals.
1397                  */
1398                 if (colornum == ORIGINAL_PAIR)
1399                         printf("\033[0;39;49m");
1400                 else
1401                         printf("\033[%d;3%d;4%dm",
1402                                         (colornum & 8) ? 1 : 0,
1403                                         (colornum & 7),
1404                                         rc_color_use_bg);
1405
1406         }
1407 }
1408
1409 void cls(int colornum)
1410 {
1411         if (enable_color) {
1412                 printf("\033[4%dm\033[2J\033[H\033[0m",
1413                                 colornum ? colornum : rc_color_use_bg);
1414         }
1415 }
1416
1417
1418 /*
1419  * Detect whether ANSI color is available (answerback)
1420  */
1421 void send_ansi_detect(void)
1422 {
1423         if (rc_ansi_color == 2) {
1424                 printf("\033[c");
1425                 scr_flush();
1426                 time(&AnsiDetect);
1427         }
1428 }
1429
1430 void look_for_ansi(void)
1431 {
1432         fd_set rfds;
1433         struct timeval tv;
1434         char abuf[512];
1435         time_t now;
1436         int a, rv;
1437
1438         if (rc_ansi_color == 0) {
1439                 enable_color = 0;
1440         } else if (rc_ansi_color == 1) {
1441                 enable_color = 1;
1442         } else if (rc_ansi_color == 2) {
1443
1444                 /* otherwise, do the auto-detect */
1445
1446                 strcpy(abuf, "");
1447
1448                 time(&now);
1449                 if ((now - AnsiDetect) < 2)
1450                         sleep(1);
1451
1452                 do {
1453                         FD_ZERO(&rfds);
1454                         FD_SET(0, &rfds);
1455                         tv.tv_sec = 0;
1456                         tv.tv_usec = 1;
1457
1458                         select(1, &rfds, NULL, NULL, &tv);
1459                         if (FD_ISSET(0, &rfds)) {
1460                                 abuf[strlen(abuf) + 1] = 0;
1461                                 rv = read(0, &abuf[strlen(abuf)], 1);
1462                                 if (rv < 0) {
1463                                         scr_printf("failed to read after select: %s",
1464                                                    strerror(errno));
1465                                         break;
1466                                 }
1467                         }
1468                 } while (FD_ISSET(0, &rfds));
1469
1470                 for (a = 0; !IsEmptyStr(&abuf[a]); ++a) {
1471                         if ((abuf[a] == 27) && (abuf[a + 1] == '[')
1472                             && (abuf[a + 2] == '?')) {
1473                                 enable_color = 1;
1474                         }
1475                 }
1476         }
1477 }
1478
1479
1480 /*
1481  * Display key options (highlight hotkeys inside angle brackets)
1482  */
1483 void keyopt(char *buf) {
1484         int i;
1485
1486         color(DIM_WHITE);
1487         for (i=0; !IsEmptyStr(&buf[i]); ++i) {
1488                 if (buf[i]=='<') {
1489                         scr_printf("%c", buf[i]);
1490                         color(BRIGHT_MAGENTA);
1491                 } else {
1492                         if (buf[i]=='>'&& buf[i+1] != '>') {
1493                                 color(DIM_WHITE);
1494                         }
1495                         scr_printf("%c", buf[i]);
1496                 }
1497         }
1498         color(DIM_WHITE);
1499 }
1500
1501
1502
1503 /*
1504  * Present a key-menu line choice type of thing
1505  */
1506 char keymenu(char *menuprompt, char *menustring) {
1507         int i, c, a;
1508         int choices;
1509         int do_prompt = 0;
1510         char buf[1024];
1511         int ch;
1512         int display_prompt = 1;
1513
1514         choices = num_tokens(menustring, '|');
1515
1516         if (menuprompt != NULL) do_prompt = 1;
1517         if ((menuprompt != NULL) && (IsEmptyStr(menuprompt))) do_prompt = 0;
1518
1519         while (1) {
1520                 if (display_prompt) {
1521                         if (do_prompt) {
1522                                 scr_printf("%s ", menuprompt);
1523                         }
1524                         else {
1525                                 for (i=0; i<choices; ++i) {
1526                                         extract_token(buf, menustring, i, '|', sizeof buf);
1527                                         keyopt(buf);
1528                                         scr_printf(" ");
1529                                 }
1530                         }
1531                         scr_printf("-> ");
1532                         display_prompt = 0;
1533                 }
1534                 ch = lkey();
1535
1536                 if ( (do_prompt) && (ch=='?') ) {
1537                         scr_printf("\rOne of...                               ");
1538                         scr_printf("                                      \n");
1539                         for (i=0; i<choices; ++i) {
1540                                 extract_token(buf, menustring, i, '|', sizeof buf);
1541                                 scr_printf("   ");
1542                                 keyopt(buf);
1543                                 scr_printf("\n");
1544                         }
1545                         scr_printf("\n");
1546                         display_prompt = 1;
1547                 }
1548
1549                 for (i=0; i<choices; ++i) {
1550                         extract_token(buf, menustring, i, '|', sizeof buf);
1551                         for (c=1; !IsEmptyStr(&buf[c]); ++c) {
1552                                 if ( (ch == tolower(buf[c]))
1553                                    && (buf[c-1]=='<')
1554                                    && (buf[c+1]=='>') ) {
1555                                         for (a=0; !IsEmptyStr(&buf[a]); ++a) {
1556                                                 if ( (a!=(c-1)) && (a!=(c+1))) {
1557                                                         scr_putc(buf[a]);
1558                                                 }
1559                                         }
1560                                         scr_printf("\n");
1561                                         return ch;
1562                                 }
1563                         }
1564                 }
1565         }
1566 }