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