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, "use_background=", 15)) {
 777                         if (!strncasecmp(&buf[15], "on", 2))
 778                                 rc_color_use_bg = 9;
 779                 }
 780                 if (!strncasecmp(buf, "prompt_control=", 15)) {
 781                         if (!strncasecmp(&buf[15], "on", 2))
 782                                 rc_prompt_control = 1;
 783                         if (!strncasecmp(&buf[15], "user", 4))
 784                                 rc_prompt_control = 3;  /* user config */
 785                 }
 786                 if (!strncasecmp(buf, "username=", 9))
 787                         strcpy(rc_username, &buf[9]);
 788
 789                 if (!strncasecmp(buf, "password=", 9))
 790                         strcpy(rc_password, &buf[9]);
 791
 792                 if (!strncasecmp(buf, "urlcmd=", 7))
 793                         strcpy(rc_url_cmd, &buf[7]);
 794
 795                 if (!strncasecmp(buf, "opencmd=", 7))
 796                         strcpy(rc_open_cmd, &buf[8]);
 797
 798                 if (!strncasecmp(buf, "gotmailcmd=", 11))
 799                         strcpy(rc_gotmail_cmd, &buf[11]);
 800
 801                 if (!strncasecmp(buf, "cmd=", 4)) {
 802                         strcpy(buf, &buf[4]);
 803
 804                         cptr = (struct citcmd *) malloc(sizeof(struct citcmd));
 805
 806                         cptr->c_cmdnum = atoi(buf);
 807                         for (d = strlen(buf); d >= 0; --d)
 808                                 if (buf[d] == ',')
 809                                         b = d;
 810                         strcpy(buf, &buf[b + 1]);
 811
 812                         cptr->c_axlevel = atoi(buf);
 813                         for (d = strlen(buf); d >= 0; --d)
 814                                 if (buf[d] == ',')
 815                                         b = d;
 816                         strcpy(buf, &buf[b + 1]);
 817
 818                         for (a = 0; a < 5; ++a)
 819                                 cptr->c_keys[a][0] = 0;
 820
 821                         a = 0;
 822                         b = 0;
 823                         buf[strlen(buf) + 1] = 0;
 824                         while (!IsEmptyStr(buf)) {
 825                                 b = strlen(buf);
 826                                 for (d = strlen(buf); d >= 0; --d)
 827                                         if (buf[d] == ',')
 828                                                 b = d;
 829                                 strncpy(cptr->c_keys[a], buf, b);
 830                                 cptr->c_keys[a][b] = 0;
 831                                 if (buf[b] == ',')
 832                                         strcpy(buf, &buf[b + 1]);
 833                                 else
 834                                         strcpy(buf, "");
 835                                 ++a;
 836                         }
 837
 838                         cptr->next = NULL;
 839                         if (cmdlist == NULL)
 840                                 cmdlist = cptr;
 841                         else
 842                                 lastcmd->next = cptr;
 843                         lastcmd = cptr;
 844                 }
 845         }
 846         fclose(ccfile);
 847 }
 848
 849
 850
 851 /*
 852  * return the key associated with a command
 853  */
 854 char keycmd(char *cmdstr)
 855 {
 856         int a;
 857
 858         for (a = 0; !IsEmptyStr(&cmdstr[a]); ++a)
 859                 if (cmdstr[a] == '&')
 860                         return (tolower(cmdstr[a + 1]));
 861         return (0);
 862 }
 863
 864
 865 /*
 866  * Output the string from a key command without the ampersand
 867  * "mode" should be set to 0 for normal or 1 for <C>ommand key highlighting
 868  */
 869 char *cmd_expand(char *strbuf, int mode)
 870 {
 871         int a;
 872         static char exp[64];
 873         char buf[1024];
 874
 875         strcpy(exp, strbuf);
 876
 877         for (a = 0; exp[a]; ++a) {
 878                 if (strbuf[a] == '&') {
 879
 880                         /* dont echo these non mnemonic command keys */
 881                         int noecho = strbuf[a+1] == '<' || strbuf[a+1] == '>' || strbuf[a+1] == '+' || strbuf[a+1] == '-';
 882
 883                         if (mode == 0) {
 884                                 strcpy(&exp[a], &exp[a + 1 + noecho]);
 885                         }
 886                         if (mode == 1) {
 887                                 exp[a] = '<';
 888                                 strcpy(buf, &exp[a + 2]);
 889                                 exp[a + 2] = '>';
 890                                 exp[a + 3] = 0;
 891                                 strcat(exp, buf);
 892                         }
 893                 }
 894                 if (!strncmp(&exp[a], "^r", 2)) {
 895                         strcpy(buf, exp);
 896                         strcpy(&exp[a], room_name);
 897                         strcat(exp, &buf[a + 2]);
 898                 }
 899                 if (!strncmp(&exp[a], "^c", 2)) {
 900                         exp[a] = ',';
 901                         strcpy(&exp[a + 1], &exp[a + 2]);
 902                 }
 903         }
 904
 905         return (exp);
 906 }
 907
 908
 909
 910 /*
 911  * Comparison function to determine if entered commands match a
 912  * command loaded from the config file.
 913  */
 914 int cmdmatch(char *cmdbuf, struct citcmd *cptr, int ncomp)
 915 {
 916         int a;
 917         int cmdax;
 918
 919         cmdax = 0;
 920         if (is_room_aide)
 921                 cmdax = 1;
 922         if (axlevel >= 6)
 923                 cmdax = 2;
 924
 925         for (a = 0; a < ncomp; ++a) {
 926                 if ((tolower(cmdbuf[a]) != keycmd(cptr->c_keys[a]))
 927                     || (cptr->c_axlevel > cmdax))
 928                         return (0);
 929         }
 930         return (1);
 931 }
 932
 933
 934 /*
 935  * This function returns 1 if a given command requires a string input
 936  */
 937 int requires_string(struct citcmd *cptr, int ncomp)
 938 {
 939         int a;
 940         char buf[64];
 941
 942         strcpy(buf, cptr->c_keys[ncomp - 1]);
 943         for (a = 0; !IsEmptyStr(&buf[a]); ++a) {
 944                 if (buf[a] == ':')
 945                         return (1);
 946         }
 947         return (0);
 948 }
 949
 950
 951 /*
 952  * Input a command at the main prompt.
 953  * This function returns an integer command number.  If the command prompts
 954  * for a string then it is placed in the supplied buffer.
 955  */
 956 int getcmd(CtdlIPC *ipc, char *argbuf)
 957 {
 958         char cmdbuf[5];
 959         int cmdspaces[5];
 960         int cmdpos;
 961         int ch;
 962         int a;
 963         int got;
 964         int this_lazy_cmd;
 965         struct citcmd *cptr;
 966
 967         /*
 968          * Starting a new command now, so set sigcaught to 0.  This variable
 969          * is set to nonzero (usually NEXT_KEY or STOP_KEY) if a command has
 970          * been interrupted by a keypress.
 971          */
 972         sigcaught = 0;
 973
 974         /* Switch color support on or off if we're in user mode */
 975         if (rc_ansi_color == 3) {
 976                 if (userflags & US_COLOR)
 977                         enable_color = 1;
 978                 else
 979                         enable_color = 0;
 980         }
 981         /* if we're running in idiot mode, display a cute little menu */
 982         IFNEXPERT formout(ipc, "mainmenu");
 983
 984         print_instant();
 985         strcpy(argbuf, "");
 986         cmdpos = 0;
 987         for (a = 0; a < 5; ++a)
 988                 cmdbuf[a] = 0;
 989         /* now the room prompt... */
 990         ok_to_interrupt = 1;
 991         color(BRIGHT_WHITE);
 992         scr_printf("\n%s", room_name);
 993         color(DIM_WHITE);
 994         scr_printf("%c ", room_prompt(room_flags));
 995
 996         while (1) {
 997                 ch = inkey();
 998                 ok_to_interrupt = 0;
 999
1000                 /* Handle the backspace key, but only if there's something
1001                  * to backspace over...
1002                  */
1003                 if ((ch == 8) && (cmdpos > 0)) {
1004                         back(cmdspaces[cmdpos - 1] + 1);
1005                         cmdbuf[cmdpos] = 0;
1006                         --cmdpos;
1007                 }
1008                 /* Spacebar invokes "lazy traversal" commands */
1009                 if ((ch == 32) && (cmdpos == 0)) {
1010                         this_lazy_cmd = next_lazy_cmd;
1011                         if (this_lazy_cmd == 13)
1012                                 next_lazy_cmd = 5;
1013                         if (this_lazy_cmd == 5)
1014                                 next_lazy_cmd = 13;
1015                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1016                                 if (cptr->c_cmdnum == this_lazy_cmd) {
1017                                         for (a = 0; a < 5; ++a)
1018                                                 if (cptr->c_keys[a][0] != 0)
1019                                                         scr_printf("%s ", cmd_expand(
1020                                                                                         cptr->c_keys[a], 0));
1021                                         scr_printf("\n");
1022                                         return (this_lazy_cmd);
1023                                 }
1024                         }
1025                         scr_printf("\n");
1026                         return (this_lazy_cmd);
1027                 }
1028                 /* Otherwise, process the command */
1029                 cmdbuf[cmdpos] = tolower(ch);
1030
1031                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1032                         if (cmdmatch(cmdbuf, cptr, cmdpos + 1)) {
1033
1034                                 scr_printf("%s", cmd_expand(cptr->c_keys[cmdpos], 0));
1035                                 cmdspaces[cmdpos] = strlen(
1036                                     cmd_expand(cptr->c_keys[cmdpos], 0));
1037                                 if (cmdpos < 4)
1038                                         if ((cptr->c_keys[cmdpos + 1]) != 0)
1039                                                 scr_putc(' ');
1040                                 ++cmdpos;
1041                         }
1042                 }
1043
1044                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1045                         if (cmdmatch(cmdbuf, cptr, 5)) {
1046                                 /* We've found our command. */
1047                                 if (requires_string(cptr, cmdpos)) {
1048                                         ctdl_getline(argbuf, 64);
1049                                 } else {
1050                                         scr_printf("\n");
1051                                 }
1052
1053                                 /* If this command is one that changes rooms,
1054                                  * then the next lazy-command (space bar)
1055                                  * should be "read new" instead of "goto"
1056                                  */
1057                                 if ((cptr->c_cmdnum == 5)
1058                                     || (cptr->c_cmdnum == 6)
1059                                     || (cptr->c_cmdnum == 47)
1060                                     || (cptr->c_cmdnum == 52)
1061                                     || (cptr->c_cmdnum == 16)
1062                                     || (cptr->c_cmdnum == 20))
1063                                         next_lazy_cmd = 13;
1064
1065                                 /* If this command is "read new"
1066                                  * then the next lazy-command (space bar)
1067                                  * should be "goto"
1068                                  */
1069                                 if (cptr->c_cmdnum == 13)
1070                                         next_lazy_cmd = 5;
1071
1072                                 return (cptr->c_cmdnum);
1073
1074                         }
1075                 }
1076
1077                 if (ch == '?') {
1078                         scr_printf("\rOne of ...                         \n");
1079                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1080                                 if (cmdmatch(cmdbuf, cptr, cmdpos)) {
1081                                         for (a = 0; a < 5; ++a) {
1082                                            keyopt(cmd_expand(cptr->c_keys[a], 1));
1083                                    scr_printf(" ");
1084                                         }
1085                                         scr_printf("\n");
1086                                 }
1087                         }
1088                 sigcaught = 0;
1089
1090                         scr_printf("\n%s%c ", room_name, room_prompt(room_flags));
1091                         got = 0;
1092                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1093                                 if ((got == 0) && (cmdmatch(cmdbuf, cptr, cmdpos))) {
1094                                         for (a = 0; a < cmdpos; ++a) {
1095                                                 scr_printf("%s ",
1096                                                        cmd_expand(cptr->c_keys[a], 0));
1097                                         }
1098                                         got = 1;
1099                                 }
1100                         }
1101                 }
1102         }
1103
1104 }
1105
1106
1107
1108
1109
1110 /*
1111  * set tty modes.  commands are:
1112  *
1113  * 01- set to Citadel mode
1114  * 2 - save current settings for later restoral
1115  * 3 - restore saved settings
1116  */
1117 #ifdef HAVE_TERMIOS_H
1118 void stty_ctdl(int cmd)
1119 {                               /* SysV version of stty_ctdl() */
1120         struct termios live;
1121         static struct termios saved_settings;
1122         static int last_cmd = 0;
1123
1124         if (cmd == SB_LAST)
1125                 cmd = last_cmd;
1126         else
1127                 last_cmd = cmd;
1128
1129         if ((cmd == 0) || (cmd == 1)) {
1130                 tcgetattr(0, &live);
1131                 live.c_iflag = ISTRIP | IXON | IXANY;
1132                 live.c_oflag = OPOST | ONLCR;
1133                 live.c_lflag = ISIG | NOFLSH;
1134
1135                 live.c_cc[VINTR] = 0;
1136                 live.c_cc[VQUIT] = 0;
1137
1138 #ifdef hpux
1139                 live.c_cc[VMIN] = 0;
1140                 live.c_cc[VTIME] = 0;
1141 #endif
1142
1143                 /* do we even need this stuff anymore? */
1144                 /* live.c_line=0; */
1145                 live.c_cc[VERASE] = 8;
1146                 live.c_cc[VKILL] = 24;
1147                 live.c_cc[VEOF] = 1;
1148                 live.c_cc[VEOL] = 255;
1149                 live.c_cc[VEOL2] = 0;
1150                 live.c_cc[VSTART] = 0;
1151                 tcsetattr(0, TCSADRAIN, &live);
1152         }
1153         if (cmd == 2) {
1154                 tcgetattr(0, &saved_settings);
1155         }
1156         if (cmd == 3) {
1157                 tcsetattr(0, TCSADRAIN, &saved_settings);
1158         }
1159
1160 }
1161 #else
1162 void stty_ctdl(int cmd)
1163 {                               /* BSD version of stty_ctdl() */
1164         struct sgttyb live;
1165         static struct sgttyb saved_settings;
1166         static int last_cmd = 0;
1167
1168         if (cmd == SB_LAST)
1169                 cmd = last_cmd;
1170         else
1171                 last_cmd = cmd;
1172
1173         if ((cmd == 0) || (cmd == 1)) {
1174                 gtty(0, &live);
1175                 live.sg_flags |= CBREAK;
1176                 live.sg_flags |= CRMOD;
1177                 live.sg_flags |= NL1;
1178                 live.sg_flags &= ~ECHO;
1179                 if (cmd == 1)
1180                         live.sg_flags |= NOFLSH;
1181                 stty(0, &live);
1182         }
1183         if (cmd == 2) {
1184                 gtty(0, &saved_settings);
1185         }
1186         if (cmd == 3) {
1187                 stty(0, &saved_settings);
1188         }
1189 }
1190 #endif
1191
1192
1193 /*
1194  * display_help()  -  help file viewer
1195  */
1196 void display_help(CtdlIPC *ipc, char *name)
1197 {
1198         formout(ipc, name);
1199 }
1200
1201
1202 /*
1203  * fmout() - Citadel text formatter and paginator
1204  */
1205 int fmout(
1206         int width,      /* screen width to use */
1207         FILE *fpin,     /* file to read from, or NULL to format given text */
1208         char *text,     /* text to be formatted (when fpin is NULL */
1209         FILE *fpout,    /* file to write to, or NULL to write to screen */
1210         int subst)      /* nonzero if we should use hypertext mode */
1211 {
1212         char *buffer = NULL;    /* The current message */
1213         char *word = NULL;      /* What we are about to actually print */
1214         char *e;                /* Pointer to position in text */
1215         char old = 0;           /* The previous character */
1216         int column = 0;         /* Current column */
1217         size_t i;               /* Generic counter */
1218
1219         /* Space for a single word, which can be at most screenwidth */
1220         word = (char *)calloc(1, width);
1221         if (!word) {
1222                 scr_printf("Can't alloc memory to print message: %s!\n",
1223                                 strerror(errno));
1224                 logoff(NULL, 3);
1225         }
1226
1227         /* Read the entire message body into memory */
1228         if (fpin) {
1229                 buffer = load_message_from_file(fpin);
1230                 if (!buffer) {
1231                         scr_printf("Can't print message: %s!\n",
1232                                         strerror(errno));
1233                         logoff(NULL, 3);
1234                 }
1235         } else {
1236                 buffer = text;
1237         }
1238         e = buffer;
1239
1240         /* Run the message body */
1241         while (*e) {
1242                 /* Catch characters that shouldn't be there at all */
1243                 if (*e == '\r') {
1244                         e++;
1245                         continue;
1246                 }
1247                 /* First, are we looking at a newline? */
1248                 if (*e == '\n') {
1249                         e++;
1250                         if (*e == ' ') {        /* Paragraph */
1251                                 if (fpout) {
1252                                         fprintf(fpout, "\n");
1253                                 } else {
1254                                         scr_printf("\n");
1255                                 }
1256                                 column = 0;
1257                         } else if (old != ' ') {/* Don't print two spaces */
1258                                 if (fpout) {
1259                                         fprintf(fpout, " ");
1260                                 } else {
1261                                         scr_printf(" ");
1262                                 }
1263                                 column++;
1264                         }
1265                         old = '\n';
1266                         continue;
1267                 }
1268
1269                 /* Are we looking at a nonprintable?
1270                  * (This section is now commented out because we could be displaying
1271                  * a character set like UTF-8 or ISO-8859-1.)
1272                 if ( (*e < 32) || (*e > 126) ) {
1273                         e++;
1274                         continue;
1275                 } */
1276
1277                 /* Or are we looking at a space? */
1278                 if (*e == ' ') {
1279                         e++;
1280                         if (column >= width - 1) {
1281                                 /* Are we in the rightmost column? */
1282                                 if (fpout) {
1283                                         fprintf(fpout, "\n");
1284                                 } else {
1285                                         scr_printf("\n");
1286                                 }
1287                                 column = 0;
1288                         } else if (!(column == 0 && old == ' ')) {
1289                                 /* Eat only the first space on a line */
1290                                 if (fpout) {
1291                                         fprintf(fpout, " ");
1292                                 } else {
1293                                         scr_printf(" ");
1294                                 }
1295                                 column++;
1296                         }
1297                         /* ONLY eat the FIRST space on a line */
1298                         old = ' ';
1299                         continue;
1300                 }
1301                 old = *e;
1302
1303                 /* Read a word, slightly messy */
1304                 i = 0;
1305                 while (e[i]) {
1306                         if (!isprint(e[i]) && !isspace(e[i]))
1307                                 e[i] = ' ';
1308                         if (isspace(e[i]))
1309                                 break;
1310                         i++;
1311                 }
1312
1313                 /* We should never see these, but... slightly messy */
1314                 if (e[i] == '\t' || e[i] == '\f' || e[i] == '\v')
1315                         e[i] = ' ';
1316
1317                 /* Break up really long words */
1318                 /* TODO: auto-hyphenation someday? */
1319                 if (i >= width)
1320                         i = width - 1;
1321                 strncpy(word, e, i);
1322                 word[i] = 0;
1323
1324                 /* Decide where to print the word */
1325                 if (column + i >= width) {
1326                         /* Wrap to the next line */
1327                         if (fpout) {
1328                                 fprintf(fpout, "\n");
1329                         } else {
1330                                 scr_printf("\n");
1331                         }
1332                         column = 0;
1333                 }
1334
1335                 /* Print the word */
1336                 if (fpout) {
1337                         fprintf(fpout, "%s", word);
1338                 } else {
1339                         scr_printf("%s", word);
1340                 }
1341                 column += i;
1342                 e += i;         /* Start over with the whitepsace! */
1343         }
1344
1345         free(word);
1346         if (fpin)               /* We allocated this, remember? */
1347                 free(buffer);
1348
1349         /* Is this necessary?  It makes the output kind of spacey. */
1350         if (fpout) {
1351                 fprintf(fpout, "\n");
1352         } else {
1353                 scr_printf("\n");
1354         }
1355
1356         return sigcaught;
1357 }
1358
1359
1360 /*
1361  * support ANSI color if defined
1362  */
1363 void color(int colornum)
1364 {
1365         static int hold_color;
1366         static int current_color;
1367
1368         if (colornum == COLOR_PUSH) {
1369                 hold_color = current_color;
1370                 return;
1371         }
1372
1373         if (colornum == COLOR_POP) {
1374                 color(hold_color);
1375                 return;
1376         }
1377
1378         current_color = colornum;
1379         if (enable_color) {
1380                 /* When switching to dim white, actually output an 'original
1381                  * pair' sequence -- this looks better on black-on-white
1382                  * terminals. - Changed to ORIGINAL_PAIR as this actually
1383                  * wound up looking horrible on black-on-white terminals, not
1384                  * to mention transparent terminals.
1385                  */
1386                 if (colornum == ORIGINAL_PAIR)
1387                         printf("\033[0;39;49m");
1388                 else
1389                         printf("\033[%d;3%d;4%dm",
1390                                         (colornum & 8) ? 1 : 0,
1391                                         (colornum & 7),
1392                                         rc_color_use_bg);
1393
1394         }
1395 }
1396
1397 void cls(int colornum)
1398 {
1399         if (enable_color) {
1400                 printf("\033[4%dm\033[2J\033[H\033[0m",
1401                                 colornum ? colornum : rc_color_use_bg);
1402         }
1403 }
1404
1405
1406 /*
1407  * Detect whether ANSI color is available (answerback)
1408  */
1409 void send_ansi_detect(void)
1410 {
1411         if (rc_ansi_color == 2) {
1412                 printf("\033[c");
1413                 scr_flush();
1414                 time(&AnsiDetect);
1415         }
1416 }
1417
1418 void look_for_ansi(void)
1419 {
1420         fd_set rfds;
1421         struct timeval tv;
1422         char abuf[512];
1423         time_t now;
1424         int a, rv;
1425
1426         if (rc_ansi_color == 0) {
1427                 enable_color = 0;
1428         } else if (rc_ansi_color == 1) {
1429                 enable_color = 1;
1430         } else if (rc_ansi_color == 2) {
1431
1432                 /* otherwise, do the auto-detect */
1433
1434                 strcpy(abuf, "");
1435
1436                 time(&now);
1437                 if ((now - AnsiDetect) < 2)
1438                         sleep(1);
1439
1440                 do {
1441                         FD_ZERO(&rfds);
1442                         FD_SET(0, &rfds);
1443                         tv.tv_sec = 0;
1444                         tv.tv_usec = 1;
1445
1446                         select(1, &rfds, NULL, NULL, &tv);
1447                         if (FD_ISSET(0, &rfds)) {
1448                                 abuf[strlen(abuf) + 1] = 0;
1449                                 rv = read(0, &abuf[strlen(abuf)], 1);
1450                                 if (rv < 0) {
1451                                         scr_printf("failed to read after select: %s",
1452                                                    strerror(errno));
1453                                         break;
1454                                 }
1455                         }
1456                 } while (FD_ISSET(0, &rfds));
1457
1458                 for (a = 0; !IsEmptyStr(&abuf[a]); ++a) {
1459                         if ((abuf[a] == 27) && (abuf[a + 1] == '[')
1460                             && (abuf[a + 2] == '?')) {
1461                                 enable_color = 1;
1462                         }
1463                 }
1464         }
1465 }
1466
1467
1468 /*
1469  * Display key options (highlight hotkeys inside angle brackets)
1470  */
1471 void keyopt(char *buf) {
1472         int i;
1473
1474         color(DIM_WHITE);
1475         for (i=0; !IsEmptyStr(&buf[i]); ++i) {
1476                 if (buf[i]=='<') {
1477                         scr_printf("%c", buf[i]);
1478                         color(BRIGHT_MAGENTA);
1479                 } else {
1480                         if (buf[i]=='>'&& buf[i+1] != '>') {
1481                                 color(DIM_WHITE);
1482                         }
1483                         scr_printf("%c", buf[i]);
1484                 }
1485         }
1486         color(DIM_WHITE);
1487 }
1488
1489
1490
1491 /*
1492  * Present a key-menu line choice type of thing
1493  */
1494 char keymenu(char *menuprompt, char *menustring) {
1495         int i, c, a;
1496         int choices;
1497         int do_prompt = 0;
1498         char buf[1024];
1499         int ch;
1500         int display_prompt = 1;
1501
1502         choices = num_tokens(menustring, '|');
1503
1504         if (menuprompt != NULL) do_prompt = 1;
1505         if ((menuprompt != NULL) && (IsEmptyStr(menuprompt))) do_prompt = 0;
1506
1507         while (1) {
1508                 if (display_prompt) {
1509                         if (do_prompt) {
1510                                 scr_printf("%s ", menuprompt);
1511                         }
1512                         else {
1513                                 for (i=0; i<choices; ++i) {
1514                                         extract_token(buf, menustring, i, '|', sizeof buf);
1515                                         keyopt(buf);
1516                                         scr_printf(" ");
1517                                 }
1518                         }
1519                         scr_printf("-> ");
1520                         display_prompt = 0;
1521                 }
1522                 ch = lkey();
1523
1524                 if ( (do_prompt) && (ch=='?') ) {
1525                         scr_printf("\rOne of...                               ");
1526                         scr_printf("                                      \n");
1527                         for (i=0; i<choices; ++i) {
1528                                 extract_token(buf, menustring, i, '|', sizeof buf);
1529                                 scr_printf("   ");
1530                                 keyopt(buf);
1531                                 scr_printf("\n");
1532                         }
1533                         scr_printf("\n");
1534                         display_prompt = 1;
1535                 }
1536
1537                 for (i=0; i<choices; ++i) {
1538                         extract_token(buf, menustring, i, '|', sizeof buf);
1539                         for (c=1; !IsEmptyStr(&buf[c]); ++c) {
1540                                 if ( (ch == tolower(buf[c]))
1541                                    && (buf[c-1]=='<')
1542                                    && (buf[c+1]=='>') ) {
1543                                         for (a=0; !IsEmptyStr(&buf[a]); ++a) {
1544                                                 if ( (a!=(c-1)) && (a!=(c+1))) {
1545                                                         scr_putc(buf[a]);
1546                                                 }
1547                                         }
1548                                         scr_printf("\n");
1549                                         return ch;
1550                                 }
1551                         }
1552                 }
1553         }
1554 }