citadel/textclient/commands.c

   1 /*
   2  * This file contains functions which implement parts of the
   3  * text-mode user interface.
   4  *
   5  * Copyright (c) 1987-2010 by the citadel.org team
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 3 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include "sysdep.h"
  23 #include <stdlib.h>
  24 #include <unistd.h>
  25 #include <stdio.h>
  26 #include <fcntl.h>
  27 #include <ctype.h>
  28 #include <string.h>
  29 #include <sys/types.h>
  30
  31 #if TIME_WITH_SYS_TIME
  32 # include <sys/time.h>
  33 # include <time.h>
  34 #else
  35 # if HAVE_SYS_TIME_H
  36 #  include <sys/time.h>
  37 # else
  38 #  include <time.h>
  39 # endif
  40 #endif
  41
  42 #ifdef HAVE_TERMIOS_H
  43 #include <termios.h>
  44 #else
  45 #include <sgtty.h>
  46 #endif
  47
  48 #ifdef HAVE_SYS_SELECT_H
  49 #include <sys/select.h>
  50 #endif
  51
  52 #ifdef THREADED_CLIENT
  53 #include <pthread.h>
  54 #endif
  55
  56 #include <signal.h>
  57 #include <errno.h>
  58 #include <stdarg.h>
  59 #include <libcitadel.h>
  60 #include "citadel.h"
  61 #include "citadel_ipc.h"
  62 #include "commands.h"
  63 #include "messages.h"
  64 #include "citadel_decls.h"
  65 #include "routines.h"
  66 #include "routines2.h"
  67 #include "rooms.h"
  68 #include "client_chat.h"
  69 #include "citadel_dirs.h"
  70 #ifndef HAVE_SNPRINTF
  71 #include "snprintf.h"
  72 #endif
  73 #include "screen.h"
  74 #include "ecrash.h"
  75
  76 struct citcmd {
  77         struct citcmd *next;
  78         int c_cmdnum;
  79         int c_axlevel;
  80         char c_keys[5][64];
  81 };
  82
  83 #define IFNEXPERT if ((userflags&US_EXPERT)==0)
  84
  85
  86 int rc_exp_beep;
  87 char rc_exp_cmd[1024];
  88 int rc_allow_attachments;
  89 int rc_display_message_numbers;
  90 int rc_force_mail_prompts;
  91 int rc_remember_passwords;
  92 int rc_ansi_color;
  93 int rc_color_use_bg;
  94 int rc_prompt_control = 0;
  95 time_t rc_idle_threshold = (time_t)900;
  96 char rc_url_cmd[SIZ];
  97 char rc_open_cmd[SIZ];
  98 char rc_gotmail_cmd[SIZ];
  99
 100 char *gl_string;
 101 int next_lazy_cmd = 5;
 102
 103 extern int screenwidth, screenheight;
 104 extern int termn8;
 105 extern CtdlIPC *ipc_for_signal_handlers;        /* KLUDGE cover your eyes */
 106
 107 struct citcmd *cmdlist = NULL;
 108
 109
 110 /* these variables are local to this module */
 111 char keepalives_enabled = KA_YES;       /* send NOOPs to server when idle */
 112 int ok_to_interrupt = 0;                /* print instant msgs asynchronously */
 113 time_t AnsiDetect;                      /* when did we send the detect code? */
 114 int enable_color = 0;                   /* nonzero for ANSI color */
 115
 116
 117
 118
 119 /*
 120  * If an interesting key has been pressed, return its value, otherwise 0
 121  */
 122 char was_a_key_pressed(void) {
 123         fd_set rfds;
 124         struct timeval tv;
 125         int the_character;
 126         int retval;
 127
 128         FD_ZERO(&rfds);
 129         FD_SET(0, &rfds);
 130         tv.tv_sec = 0;
 131         tv.tv_usec = 0;
 132         retval = select(1, &rfds, NULL, NULL, &tv);
 133
 134         /* Careful!  Disable keepalives during keyboard polling; we're probably
 135          * in the middle of a data transfer from the server, in which case
 136          * sending a NOOP would throw the client protocol out of sync.
 137          */
 138         if (FD_ISSET(0, &rfds)) {
 139                 set_keepalives(KA_NO);
 140                 the_character = inkey();
 141                 set_keepalives(KA_YES);
 142         }
 143         else {
 144                 the_character = 0;
 145         }
 146         return(the_character);
 147 }
 148
 149
 150
 151
 152
 153 /*
 154  * print_instant()  -  print instant messages if there are any
 155  */
 156 void print_instant(void)
 157 {
 158         char buf[1024];
 159         FILE *outpipe;
 160         time_t timestamp;
 161         struct tm stamp;
 162         int flags = 0;
 163         char sender[64];
 164         char node[64];
 165         char *listing = NULL;
 166         int r;                  /* IPC result code */
 167
 168         if (instant_msgs == 0)
 169                 return;
 170
 171         if (rc_exp_beep) {
 172                 ctdl_beep();
 173         }
 174         if (IsEmptyStr(rc_exp_cmd)) {
 175                 color(BRIGHT_RED);
 176                 scr_printf("\r---");
 177         }
 178
 179         while (instant_msgs != 0) {
 180                 r = CtdlIPCGetInstantMessage(ipc_for_signal_handlers, &listing, buf);
 181                 if (r / 100 != 1)
 182                         return;
 183
 184                 instant_msgs = extract_int(buf, 0);
 185                 timestamp = extract_long(buf, 1);
 186                 flags = extract_int(buf, 2);
 187                 extract_token(sender, buf, 3, '|', sizeof sender);
 188                 extract_token(node, buf, 4, '|', sizeof node);
 189                 strcpy(last_paged, sender);
 190
 191                 localtime_r(&timestamp, &stamp);
 192
 193                 /* If the page is a Logoff Request, honor it. */
 194                 if (flags & 2) {
 195                         termn8 = 1;
 196                         return;
 197                 }
 198
 199                 if (!IsEmptyStr(rc_exp_cmd)) {
 200                         outpipe = popen(rc_exp_cmd, "w");
 201                         if (outpipe != NULL) {
 202                                 /* Header derived from flags */
 203                                 if (flags & 2)
 204                                         fprintf(outpipe,
 205                                                "Please log off now, as requested ");
 206                                 else if (flags & 1)
 207                                         fprintf(outpipe, "Broadcast message ");
 208                                 else if (flags & 4)
 209                                         fprintf(outpipe, "Chat request ");
 210                                 else
 211                                         fprintf(outpipe, "Message ");
 212                                 /* Timestamp.  Can this be improved? */
 213                                 if (stamp.tm_hour == 0 || stamp.tm_hour == 12)
 214                                         fprintf(outpipe, "at 12:%02d%cm",
 215                                                 stamp.tm_min,
 216                                                 stamp.tm_hour ? 'p' : 'a');
 217                                 else if (stamp.tm_hour > 12)            /* pm */
 218                                         fprintf(outpipe, "at %d:%02dpm",
 219                                                 stamp.tm_hour - 12,
 220                                                 stamp.tm_min);
 221                                 else                                    /* am */
 222                                         fprintf(outpipe, "at %d:%02dam",
 223                                                 stamp.tm_hour, stamp.tm_min);
 224                                 fprintf(outpipe, " from %s", sender);
 225                                 if (strncmp(ipc_for_signal_handlers->ServInfo.nodename, node, 32))
 226                                         fprintf(outpipe, " @%s", node);
 227                                 fprintf(outpipe, ":\n%s\n", listing);
 228                                 pclose(outpipe);
 229                                 if (instant_msgs == 0)
 230                                         return;
 231                                 continue;
 232                         }
 233                 }
 234                 /* fall back to built-in instant message display */
 235                 scr_printf("\n");
 236
 237                 /* Header derived from flags */
 238                 if (flags & 2)
 239                         scr_printf("Please log off now, as requested ");
 240                 else if (flags & 1)
 241                         scr_printf("Broadcast message ");
 242                 else if (flags & 4)
 243                         scr_printf("Chat request ");
 244                 else
 245                         scr_printf("Message ");
 246
 247                 /* Timestamp.  Can this be improved? */
 248                 if (stamp.tm_hour == 0 || stamp.tm_hour == 12)/* 12am/12pm */
 249                         scr_printf("at 12:%02d%cm", stamp.tm_min,
 250                                 stamp.tm_hour ? 'p' : 'a');
 251                 else if (stamp.tm_hour > 12)                    /* pm */
 252                         scr_printf("at %d:%02dpm",
 253                                 stamp.tm_hour - 12, stamp.tm_min);
 254                 else                                            /* am */
 255                         scr_printf("at %d:%02dam", stamp.tm_hour, stamp.tm_min);
 256
 257                 /* Sender */
 258                 scr_printf(" from %s", sender);
 259
 260                 /* Remote node, if any */
 261                 if (strncmp(ipc_for_signal_handlers->ServInfo.nodename, node, 32))
 262                         scr_printf(" @%s", node);
 263
 264                 scr_printf(":\n");
 265                 fmout(screenwidth, NULL, listing, NULL, 0);
 266                 free(listing);
 267
 268         }
 269         scr_printf("\n---\n");
 270         color(BRIGHT_WHITE);
 271
 272
 273 }
 274
 275
 276 void set_keepalives(int s)
 277 {
 278         keepalives_enabled = (char) s;
 279 }
 280
 281 /*
 282  * This loop handles the "keepalive" messages sent to the server when idling.
 283  */
 284
 285 static time_t idlet = 0;
 286 static void really_do_keepalive(void) {
 287         int r;                          /* IPC response code */
 288
 289         time(&idlet);
 290
 291         /* This may sometimes get called before we are actually connected
 292          * to the server.  Don't do anything if we aren't connected. -IO
 293          */
 294         if (!ipc_for_signal_handlers)
 295                 return;
 296
 297         /* If full keepalives are enabled, send a NOOP to the server and
 298          * wait for a response.
 299          */
 300         if (keepalives_enabled == KA_YES) {
 301                 r = CtdlIPCNoop(ipc_for_signal_handlers);
 302                 if (instant_msgs > 0) {
 303                         if (ok_to_interrupt == 1) {
 304                                 scr_printf("\r%64s\r", "");
 305                                 print_instant();
 306                                 scr_printf("%s%c ", room_name,
 307                                        room_prompt(room_flags));
 308                                 scr_flush();
 309                         }
 310                 }
 311         }
 312
 313         /* If half keepalives are enabled, send a QNOP to the server (if the
 314          * server supports it) and then do nothing.
 315          */
 316         if ( (keepalives_enabled == KA_HALF)
 317            && (ipc_for_signal_handlers->ServInfo.supports_qnop > 0) ) {
 318                 CtdlIPC_chat_send(ipc_for_signal_handlers, "QNOP");
 319         }
 320 }
 321
 322 /* threaded nonblocking keepalive stuff starts here. I'm going for a simple
 323    encapsulated interface; in theory there should be no need to touch these
 324    globals outside of the async_ka_* functions. */
 325
 326 #ifdef THREADED_CLIENT
 327 static pthread_t ka_thr_handle;
 328 static int ka_thr_active = 0;
 329 static int async_ka_enabled = 0;
 330
 331 static void *ka_thread(void *arg)
 332 {
 333 #ifdef HAVE_BACKTRACE
 334         char threadName[256];
 335
 336         // Set up our name
 337         sprintf(threadName, "ka_Thread n");
 338
 339         // Register for tracing
 340         eCrash_RegisterThread(threadName, 0);
 341 #endif
 342         really_do_keepalive();
 343         pthread_detach(ka_thr_handle);
 344         ka_thr_active = 0;
 345
 346 #ifdef HAVE_BACKTRACE
 347         eCrash_UnregisterThread();
 348 #endif
 349         return NULL;
 350 }
 351
 352 /* start up a thread to handle a keepalive in the background */
 353 static void async_ka_exec(void)
 354 {
 355         if (!ka_thr_active) {
 356                 ka_thr_active = 1;
 357                 if (pthread_create(&ka_thr_handle, NULL, ka_thread, NULL)) {
 358                         perror("pthread_create");
 359                         exit(1);
 360                 }
 361         }
 362 }
 363 #endif /* THREADED_CLIENT */
 364
 365 /* I changed this from static to not because I need to call it from
 366    screen.c, either that or make something in screen.c not static.
 367    Fix it how you like. Why all the staticness? stu */
 368
 369 void do_keepalive(void)
 370 {
 371         time_t now;
 372
 373         time(&now);
 374         if ((now - idlet) < ((long) S_KEEPALIVE))
 375                 return;
 376
 377         /* Do a space-backspace to keep telnet sessions from idling out */
 378         scr_printf(" %c", 8);
 379         scr_flush();
 380
 381 #ifdef THREADED_CLIENT
 382         if (async_ka_enabled)
 383                 async_ka_exec();
 384         else
 385 #endif
 386                 really_do_keepalive();
 387 }
 388
 389
 390 /* Now the actual async-keepalve API that we expose to higher levels:
 391    async_ka_start() and async_ka_end(). These do nothing when we don't have
 392    threading enabled, so we avoid sprinkling ifdef's throughout the code. */
 393
 394 /* wait for a background keepalive to complete. this must be done before
 395    attempting any further server requests! */
 396 void async_ka_end(void)
 397 {
 398 #ifdef THREADED_CLIENT
 399         if (ka_thr_active)
 400                 pthread_join(ka_thr_handle, NULL);
 401
 402         async_ka_enabled--;
 403 #endif
 404 }
 405
 406 /* tell do_keepalive() that keepalives are asynchronous. */
 407 void async_ka_start(void)
 408 {
 409 #ifdef THREADED_CLIENT
 410         async_ka_enabled++;
 411 #endif
 412 }
 413
 414
 415 int inkey(void)
 416 {                               /* get a character from the keyboard, with   */
 417         int a;                  /* the watchdog timer in effect if necessary */
 418         fd_set rfds;
 419         struct timeval tv;
 420         time_t start_time;
 421
 422         scr_flush();
 423         time(&start_time);
 424
 425         do {
 426                 /* This loop waits for keyboard input.  If the keepalive
 427                  * timer expires, it sends a keepalive to the server if
 428                  * necessary and then waits again.
 429                  */
 430                 do {
 431                         do_keepalive();
 432
 433                         FD_ZERO(&rfds);
 434                         FD_SET(0, &rfds);
 435                         tv.tv_sec = S_KEEPALIVE;
 436                         tv.tv_usec = 0;
 437
 438                         select(1, &rfds, NULL, NULL, &tv);
 439                 } while (!FD_ISSET(0, &rfds));
 440
 441                 /* At this point, there's input, so fetch it.
 442                  * (There's a hole in the bucket...)
 443                  */
 444                 a = scr_getc(SCR_BLOCK);
 445                 if (a == 127) {
 446                         a = 8;
 447                 }
 448                 if (a == 13) {
 449                         a = 10;
 450                 }
 451         } while (a == 0);
 452         return (a);
 453 }
 454
 455
 456 int yesno(void)
 457 {                               /* Returns 1 for yes, 0 for no */
 458         int a;
 459         while (1) {
 460                 a = inkey();
 461                 a = tolower(a);
 462                 if (a == 'y') {
 463                         scr_printf("Yes\n");
 464                         return (1);
 465                 }
 466                 if (a == 'n') {
 467                         scr_printf("No\n");
 468                         return (0);
 469                 }
 470         }
 471 }
 472
 473 /* Returns 1 for yes, 0 for no, arg is default value */
 474 int yesno_d(int d)
 475 {
 476         int a;
 477         while (1) {
 478                 a = inkey();
 479                 a = tolower(a);
 480                 if (a == 10)
 481                         a = (d ? 'y' : 'n');
 482                 if (a == 'y') {
 483                         scr_printf("Yes\n");
 484                         return (1);
 485                 }
 486                 if (a == 'n') {
 487                         scr_printf("No\n");
 488                         return (0);
 489                 }
 490         }
 491 }
 492
 493
 494
 495
 496 /* Gets a line from the terminal */
 497 /* string == Pointer to string buffer */
 498 /* lim == Maximum length - if negative, no-show */
 499 void ctdl_getline(char *string, int lim)
 500 {
 501         int a, b;
 502         char flag = 0;
 503
 504         if (lim < 0) {
 505                 lim = (0 - lim);
 506                 flag = 1;
 507         }
 508         strcpy(string, "");
 509         gl_string = string;
 510         async_ka_start();
 511
 512 GLA:    a = inkey();
 513         /* a = (a & 127); ** commented out because it isn't just an ASCII world anymore */
 514         if ((a == 8 || a == 23) && (IsEmptyStr(string)))
 515                 goto GLA;
 516         if ((a != 10) && (a != 8) && (strlen(string) == lim))
 517                 goto GLA;
 518         if ((a == 8) && (string[0] != 0)) {
 519                 string[strlen(string) - 1] = 0;
 520                 scr_putc(8); scr_putc(32); scr_putc(8);
 521                 goto GLA;
 522         }
 523         if ((a == 23) && (string[0] != 0)) {
 524                 do {
 525                         string[strlen(string) - 1] = 0;
 526                         scr_putc(8); scr_putc(32); scr_putc(8);
 527                 } while (!IsEmptyStr(string) && string[strlen(string) - 1] != ' ');
 528                 goto GLA;
 529         }
 530         if ((a == 10)) {
 531                 scr_putc(10);
 532                 async_ka_end();
 533                 return;
 534         }
 535         if (a < 32)
 536                 a = '.';
 537         b = strlen(string);
 538         string[b] = a;
 539         string[b + 1] = 0;
 540         if (flag == 0)
 541                 scr_putc(a);
 542         if (flag == 1)
 543                 scr_putc('*');
 544         goto GLA;
 545 }
 546
 547
 548 /*
 549  * strprompt()  -  prompt for a string, print the existing value and
 550  *                 allow the user to press return to keep it...
 551  */
 552 void strprompt(char *prompt, char *str, int len)
 553 {
 554         int i;
 555         char buf[128];
 556
 557         print_instant();
 558         color(DIM_WHITE);
 559         scr_printf("%s ", prompt);
 560         color(DIM_MAGENTA);
 561         scr_printf("[");
 562         color(BRIGHT_MAGENTA);
 563
 564         if (len >= 0) {
 565                 scr_printf("%s", str);
 566         }
 567         else {
 568                 for (i=0; !IsEmptyStr(&str[i]); ++i) {
 569                         scr_printf("*");
 570                 }
 571         }
 572
 573         color(DIM_MAGENTA);
 574         scr_printf("]");
 575         color(DIM_WHITE);
 576         scr_printf(": ");
 577         color(BRIGHT_CYAN);
 578         ctdl_getline(buf, len);
 579         if (buf[0] != 0)
 580                 strcpy(str, buf);
 581         color(DIM_WHITE);
 582 }
 583
 584 /*
 585  * boolprompt()  -  prompt for a yes/no, print the existing value and
 586  *                  allow the user to press return to keep it...
 587  */
 588 int boolprompt(char *prompt, int prev_val)
 589 {
 590         int r;
 591
 592         color(DIM_WHITE);
 593         scr_printf("%s ", prompt);
 594         color(DIM_MAGENTA);
 595         scr_printf("[");
 596         color(BRIGHT_MAGENTA);
 597         scr_printf("%s", (prev_val ? "Yes" : "No"));
 598         color(DIM_MAGENTA);
 599         scr_printf("]: ");
 600         color(BRIGHT_CYAN);
 601         r = (yesno_d(prev_val));
 602         color(DIM_WHITE);
 603         return r;
 604 }
 605
 606 /*
 607  * intprompt()  -  like strprompt(), except for an integer
 608  *                 (note that it RETURNS the new value!)
 609  */
 610 int intprompt(char *prompt, int ival, int imin, int imax)
 611 {
 612         char buf[16];
 613         int i;
 614         int p;
 615
 616         do {
 617                 i = ival;
 618                 snprintf(buf, sizeof buf, "%d", i);
 619                 strprompt(prompt, buf, 15);
 620                 i = atoi(buf);
 621                 for (p=0; !IsEmptyStr(&buf[p]); ++p) {
 622                         if ( (!isdigit(buf[p]))
 623                            && ( (buf[p]!='-') || (p!=0) )  )
 624                                 i = imin - 1;
 625                 }
 626                 if (i < imin)
 627                         scr_printf("*** Must be no less than %d.\n", imin);
 628                 if (i > imax)
 629                         scr_printf("*** Must be no more than %d.\n", imax);
 630         } while ((i < imin) || (i > imax));
 631         return (i);
 632 }
 633
 634 /*
 635  * newprompt()  -  prompt for a string with no existing value
 636  *                 (clears out string buffer first)
 637  */
 638 void newprompt(char *prompt, char *str, int len)
 639 {
 640         color(BRIGHT_MAGENTA);
 641         scr_printf("%s", prompt);
 642         color(DIM_MAGENTA);
 643         ctdl_getline(str, len);
 644         color(DIM_WHITE);
 645 }
 646
 647
 648 int lkey(void)
 649 {                               /* returns a lower case value */
 650         int a;
 651         a = inkey();
 652         if (isupper(a))
 653                 a = tolower(a);
 654         return (a);
 655 }
 656
 657 /*
 658  * parse the citadel.rc file
 659  */
 660 void load_command_set(void)
 661 {
 662         FILE *ccfile;
 663         char buf[1024];
 664         char editor_key[100];
 665         struct citcmd *cptr;
 666         struct citcmd *lastcmd = NULL;
 667         int a, d;
 668         int b = 0;
 669         int i;
 670
 671
 672         /* first, set up some defaults for non-required variables */
 673
 674         for (i = 0; i < MAX_EDITORS; i++)
 675                 strcpy(editor_paths[i], "");
 676         strcpy(printcmd, "");
 677         strcpy(imagecmd, "");
 678         strcpy(rc_username, "");
 679         strcpy(rc_password, "");
 680         rc_floor_mode = 0;
 681         rc_exp_beep = 1;
 682         rc_allow_attachments = 0;
 683         rc_remember_passwords = 0;
 684         strcpy(rc_exp_cmd, "");
 685         rc_display_message_numbers = 0;
 686         rc_force_mail_prompts = 0;
 687         rc_ansi_color = 0;
 688         rc_color_use_bg = 0;
 689         strcpy(rc_url_cmd, "");
 690         strcpy(rc_open_cmd, "");
 691         strcpy(rc_gotmail_cmd, "");
 692 #ifdef HAVE_OPENSSL
 693         rc_encrypt = RC_DEFAULT;
 694 #endif
 695         rc_alt_semantics = 0;
 696
 697         /* now try to open the citadel.rc file */
 698
 699         ccfile = NULL;
 700         if (getenv("HOME") != NULL) {
 701                 snprintf(buf, sizeof buf, "%s/.citadelrc", getenv("HOME"));
 702                 ccfile = fopen(buf, "r");
 703         }
 704         if (ccfile == NULL) {
 705                 ccfile = fopen(file_citadel_rc, "r");
 706         }
 707         if (ccfile == NULL) {
 708                 ccfile = fopen("/etc/citadel.rc", "r");
 709         }
 710         if (ccfile == NULL) {
 711                 ccfile = fopen("./citadel.rc", "r");
 712         }
 713         if (ccfile == NULL) {
 714                 perror("commands: cannot open citadel.rc");
 715                 logoff(NULL, 3);
 716         }
 717         while (fgets(buf, sizeof buf, ccfile) != NULL) {
 718                 while ((!IsEmptyStr(buf)) ? (isspace(buf[strlen(buf) - 1])) : 0)
 719                         buf[strlen(buf) - 1] = 0;
 720
 721                 if (!strncasecmp(buf, "encrypt=", 8)) {
 722                         if (!strcasecmp(&buf[8], "yes")) {
 723 #ifdef HAVE_OPENSSL
 724                                 rc_encrypt = RC_YES;
 725 #else
 726                                 fprintf(stderr, "citadel.rc requires encryption support but citadel is not compiled with OpenSSL");
 727                                 logoff(NULL, 3);
 728 #endif
 729                         }
 730 #ifdef HAVE_OPENSSL
 731                         else if (!strcasecmp(&buf[8], "no")) {
 732                                 rc_encrypt = RC_NO;
 733                         }
 734                         else if (!strcasecmp(&buf[8], "default")) {
 735                                 rc_encrypt = RC_DEFAULT;
 736                         }
 737 #endif
 738                 }
 739
 740                 if (!strncasecmp(buf, "editor=", 7))
 741                         strcpy(editor_paths[0], &buf[7]);
 742
 743                 for (i = 0; i < MAX_EDITORS; i++)
 744                 {
 745                         sprintf(editor_key, "editor%d=", i);
 746                         if (!strncasecmp(buf, editor_key, strlen(editor_key)))
 747                                 strcpy(editor_paths[i], &buf[strlen(editor_key)]);
 748                 }
 749
 750                 if (!strncasecmp(buf, "printcmd=", 9))
 751                         strcpy(printcmd, &buf[9]);
 752
 753                 if (!strncasecmp(buf, "imagecmd=", 9))
 754                         strcpy(imagecmd, &buf[9]);
 755
 756                 if (!strncasecmp(buf, "expcmd=", 7))
 757                         strcpy(rc_exp_cmd, &buf[7]);
 758
 759                 if (!strncasecmp(buf, "local_screen_dimensions=", 24))
 760                         have_xterm = (char) atoi(&buf[24]);
 761
 762                 if (!strncasecmp(buf, "use_floors=", 11)) {
 763                         if (!strcasecmp(&buf[11], "yes"))
 764                                 rc_floor_mode = RC_YES;
 765                         if (!strcasecmp(&buf[11], "no"))
 766                                 rc_floor_mode = RC_NO;
 767                         if (!strcasecmp(&buf[11], "default"))
 768                                 rc_floor_mode = RC_DEFAULT;
 769                 }
 770                 if (!strncasecmp(buf, "beep=", 5)) {
 771                         rc_exp_beep = atoi(&buf[5]);
 772                 }
 773                 if (!strncasecmp(buf, "allow_attachments=", 18)) {
 774                         rc_allow_attachments = atoi(&buf[18]);
 775                 }
 776                 if (!strncasecmp(buf, "idle_threshold=", 15)) {
 777                         rc_idle_threshold = atol(&buf[15]);
 778                 }
 779                 if (!strncasecmp(buf, "remember_passwords=", 19)) {
 780                         rc_remember_passwords = atoi(&buf[19]);
 781                 }
 782                 if (!strncasecmp(buf, "display_message_numbers=", 24)) {
 783                         rc_display_message_numbers = atoi(&buf[24]);
 784                 }
 785                 if (!strncasecmp(buf, "force_mail_prompts=", 19)) {
 786                         rc_force_mail_prompts = atoi(&buf[19]);
 787                 }
 788                 if (!strncasecmp(buf, "ansi_color=", 11)) {
 789                         if (!strncasecmp(&buf[11], "on", 2))
 790                                 rc_ansi_color = 1;
 791                         if (!strncasecmp(&buf[11], "auto", 4))
 792                                 rc_ansi_color = 2;      /* autodetect */
 793                         if (!strncasecmp(&buf[11], "user", 4))
 794                                 rc_ansi_color = 3;      /* user config */
 795                 }
 796                 if (!strncasecmp(buf, "use_background=", 15)) {
 797                         if (!strncasecmp(&buf[15], "on", 2))
 798                                 rc_color_use_bg = 9;
 799                 }
 800                 if (!strncasecmp(buf, "prompt_control=", 15)) {
 801                         if (!strncasecmp(&buf[15], "on", 2))
 802                                 rc_prompt_control = 1;
 803                         if (!strncasecmp(&buf[15], "user", 4))
 804                                 rc_prompt_control = 3;  /* user config */
 805                 }
 806                 if (!strncasecmp(buf, "username=", 9))
 807                         strcpy(rc_username, &buf[9]);
 808
 809                 if (!strncasecmp(buf, "password=", 9))
 810                         strcpy(rc_password, &buf[9]);
 811
 812                 if (!strncasecmp(buf, "urlcmd=", 7))
 813                         strcpy(rc_url_cmd, &buf[7]);
 814
 815                 if (!strncasecmp(buf, "opencmd=", 7))
 816                         strcpy(rc_open_cmd, &buf[8]);
 817
 818                 if (!strncasecmp(buf, "gotmailcmd=", 11))
 819                         strcpy(rc_gotmail_cmd, &buf[11]);
 820
 821                 if (!strncasecmp(buf, "alternate_semantics=", 20)) {
 822                         if (!strncasecmp(&buf[20], "yes", 3)) {
 823                                 rc_alt_semantics = 1;
 824                         }
 825                         else {
 826                                 rc_alt_semantics = 0;
 827                         }
 828                 }
 829
 830                 if (!strncasecmp(buf, "cmd=", 4)) {
 831                         strcpy(buf, &buf[4]);
 832
 833                         cptr = (struct citcmd *) malloc(sizeof(struct citcmd));
 834
 835                         cptr->c_cmdnum = atoi(buf);
 836                         for (d = strlen(buf); d >= 0; --d)
 837                                 if (buf[d] == ',')
 838                                         b = d;
 839                         strcpy(buf, &buf[b + 1]);
 840
 841                         cptr->c_axlevel = atoi(buf);
 842                         for (d = strlen(buf); d >= 0; --d)
 843                                 if (buf[d] == ',')
 844                                         b = d;
 845                         strcpy(buf, &buf[b + 1]);
 846
 847                         for (a = 0; a < 5; ++a)
 848                                 cptr->c_keys[a][0] = 0;
 849
 850                         a = 0;
 851                         b = 0;
 852                         buf[strlen(buf) + 1] = 0;
 853                         while (!IsEmptyStr(buf)) {
 854                                 b = strlen(buf);
 855                                 for (d = strlen(buf); d >= 0; --d)
 856                                         if (buf[d] == ',')
 857                                                 b = d;
 858                                 strncpy(cptr->c_keys[a], buf, b);
 859                                 cptr->c_keys[a][b] = 0;
 860                                 if (buf[b] == ',')
 861                                         strcpy(buf, &buf[b + 1]);
 862                                 else
 863                                         strcpy(buf, "");
 864                                 ++a;
 865                         }
 866
 867                         cptr->next = NULL;
 868                         if (cmdlist == NULL)
 869                                 cmdlist = cptr;
 870                         else
 871                                 lastcmd->next = cptr;
 872                         lastcmd = cptr;
 873                 }
 874         }
 875         fclose(ccfile);
 876 }
 877
 878
 879
 880 /*
 881  * return the key associated with a command
 882  */
 883 char keycmd(char *cmdstr)
 884 {
 885         int a;
 886
 887         for (a = 0; !IsEmptyStr(&cmdstr[a]); ++a)
 888                 if (cmdstr[a] == '&')
 889                         return (tolower(cmdstr[a + 1]));
 890         return (0);
 891 }
 892
 893
 894 /*
 895  * Output the string from a key command without the ampersand
 896  * "mode" should be set to 0 for normal or 1 for <C>ommand key highlighting
 897  */
 898 char *cmd_expand(char *strbuf, int mode)
 899 {
 900         int a;
 901         static char exp[64];
 902         char buf[1024];
 903
 904         strcpy(exp, strbuf);
 905
 906         for (a = 0; exp[a]; ++a) {
 907                 if (strbuf[a] == '&') {
 908
 909                         /* dont echo these non mnemonic command keys */
 910                         int noecho = strbuf[a+1] == '<' || strbuf[a+1] == '>' || strbuf[a+1] == '+' || strbuf[a+1] == '-';
 911
 912                         if (mode == 0) {
 913                                 strcpy(&exp[a], &exp[a + 1 + noecho]);
 914                         }
 915                         if (mode == 1) {
 916                                 exp[a] = '<';
 917                                 strcpy(buf, &exp[a + 2]);
 918                                 exp[a + 2] = '>';
 919                                 exp[a + 3] = 0;
 920                                 strcat(exp, buf);
 921                         }
 922                 }
 923                 if (!strncmp(&exp[a], "^r", 2)) {
 924                         strcpy(buf, exp);
 925                         strcpy(&exp[a], room_name);
 926                         strcat(exp, &buf[a + 2]);
 927                 }
 928                 if (!strncmp(&exp[a], "^c", 2)) {
 929                         exp[a] = ',';
 930                         strcpy(&exp[a + 1], &exp[a + 2]);
 931                 }
 932         }
 933
 934         return (exp);
 935 }
 936
 937
 938
 939 /*
 940  * Comparison function to determine if entered commands match a
 941  * command loaded from the config file.
 942  */
 943 int cmdmatch(char *cmdbuf, struct citcmd *cptr, int ncomp)
 944 {
 945         int a;
 946         int cmdax;
 947
 948         cmdax = 0;
 949         if (is_room_aide)
 950                 cmdax = 1;
 951         if (axlevel >= 6)
 952                 cmdax = 2;
 953
 954         for (a = 0; a < ncomp; ++a) {
 955                 if ((tolower(cmdbuf[a]) != keycmd(cptr->c_keys[a]))
 956                     || (cptr->c_axlevel > cmdax))
 957                         return (0);
 958         }
 959         return (1);
 960 }
 961
 962
 963 /*
 964  * This function returns 1 if a given command requires a string input
 965  */
 966 int requires_string(struct citcmd *cptr, int ncomp)
 967 {
 968         int a;
 969         char buf[64];
 970
 971         strcpy(buf, cptr->c_keys[ncomp - 1]);
 972         for (a = 0; !IsEmptyStr(&buf[a]); ++a) {
 973                 if (buf[a] == ':')
 974                         return (1);
 975         }
 976         return (0);
 977 }
 978
 979
 980 /*
 981  * Input a command at the main prompt.
 982  * This function returns an integer command number.  If the command prompts
 983  * for a string then it is placed in the supplied buffer.
 984  */
 985 int getcmd(CtdlIPC *ipc, char *argbuf)
 986 {
 987         char cmdbuf[5];
 988         int cmdspaces[5];
 989         int cmdpos;
 990         int ch;
 991         int a;
 992         int got;
 993         int this_lazy_cmd;
 994         struct citcmd *cptr;
 995
 996         /*
 997          * Starting a new command now, so set sigcaught to 0.  This variable
 998          * is set to nonzero (usually NEXT_KEY or STOP_KEY) if a command has
 999          * been interrupted by a keypress.
1000          */
1001         sigcaught = 0;
1002
1003         /* Switch color support on or off if we're in user mode */
1004         if (rc_ansi_color == 3) {
1005                 if (userflags & US_COLOR)
1006                         enable_color = 1;
1007                 else
1008                         enable_color = 0;
1009         }
1010         /* if we're running in idiot mode, display a cute little menu */
1011         IFNEXPERT formout(ipc, "mainmenu");
1012
1013         print_instant();
1014         strcpy(argbuf, "");
1015         cmdpos = 0;
1016         for (a = 0; a < 5; ++a)
1017                 cmdbuf[a] = 0;
1018         /* now the room prompt... */
1019         ok_to_interrupt = 1;
1020         color(BRIGHT_WHITE);
1021         scr_printf("\n%s", room_name);
1022         color(DIM_WHITE);
1023         scr_printf("%c ", room_prompt(room_flags));
1024
1025         while (1) {
1026                 ch = inkey();
1027                 ok_to_interrupt = 0;
1028
1029                 /* Handle the backspace key, but only if there's something
1030                  * to backspace over...
1031                  */
1032                 if ((ch == 8) && (cmdpos > 0)) {
1033                         back(cmdspaces[cmdpos - 1] + 1);
1034                         cmdbuf[cmdpos] = 0;
1035                         --cmdpos;
1036                 }
1037                 /* Spacebar invokes "lazy traversal" commands */
1038                 if ((ch == 32) && (cmdpos == 0)) {
1039                         this_lazy_cmd = next_lazy_cmd;
1040                         if (this_lazy_cmd == 13)
1041                                 next_lazy_cmd = 5;
1042                         if (this_lazy_cmd == 5)
1043                                 next_lazy_cmd = 13;
1044                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1045                                 if (cptr->c_cmdnum == this_lazy_cmd) {
1046                                         for (a = 0; a < 5; ++a)
1047                                                 if (cptr->c_keys[a][0] != 0)
1048                                                         scr_printf("%s ", cmd_expand(
1049                                                                                         cptr->c_keys[a], 0));
1050                                         scr_printf("\n");
1051                                         return (this_lazy_cmd);
1052                                 }
1053                         }
1054                         scr_printf("\n");
1055                         return (this_lazy_cmd);
1056                 }
1057                 /* Otherwise, process the command */
1058                 cmdbuf[cmdpos] = tolower(ch);
1059
1060                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1061                         if (cmdmatch(cmdbuf, cptr, cmdpos + 1)) {
1062
1063                                 scr_printf("%s", cmd_expand(cptr->c_keys[cmdpos], 0));
1064                                 cmdspaces[cmdpos] = strlen(
1065                                     cmd_expand(cptr->c_keys[cmdpos], 0));
1066                                 if (cmdpos < 4)
1067                                         if ((cptr->c_keys[cmdpos + 1]) != 0)
1068                                                 scr_putc(' ');
1069                                 ++cmdpos;
1070                         }
1071                 }
1072
1073                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1074                         if (cmdmatch(cmdbuf, cptr, 5)) {
1075                                 /* We've found our command. */
1076                                 if (requires_string(cptr, cmdpos)) {
1077                                         ctdl_getline(argbuf, 64);
1078                                 } else {
1079                                         scr_printf("\n");
1080                                 }
1081
1082                                 /* If this command is one that changes rooms,
1083                                  * then the next lazy-command (space bar)
1084                                  * should be "read new" instead of "goto"
1085                                  */
1086                                 if ((cptr->c_cmdnum == 5)
1087                                     || (cptr->c_cmdnum == 6)
1088                                     || (cptr->c_cmdnum == 47)
1089                                     || (cptr->c_cmdnum == 52)
1090                                     || (cptr->c_cmdnum == 16)
1091                                     || (cptr->c_cmdnum == 20))
1092                                         next_lazy_cmd = 13;
1093
1094                                 /* If this command is "read new"
1095                                  * then the next lazy-command (space bar)
1096                                  * should be "goto"
1097                                  */
1098                                 if (cptr->c_cmdnum == 13)
1099                                         next_lazy_cmd = 5;
1100
1101                                 return (cptr->c_cmdnum);
1102
1103                         }
1104                 }
1105
1106                 if (ch == '?') {
1107                         scr_printf("\rOne of ...                         \n");
1108                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1109                                 if (cmdmatch(cmdbuf, cptr, cmdpos)) {
1110                                         for (a = 0; a < 5; ++a) {
1111                                            keyopt(cmd_expand(cptr->c_keys[a], 1));
1112                                    scr_printf(" ");
1113                                         }
1114                                         scr_printf("\n");
1115                                 }
1116                         }
1117                 sigcaught = 0;
1118
1119                         scr_printf("\n%s%c ", room_name, room_prompt(room_flags));
1120                         got = 0;
1121                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1122                                 if ((got == 0) && (cmdmatch(cmdbuf, cptr, cmdpos))) {
1123                                         for (a = 0; a < cmdpos; ++a) {
1124                                                 scr_printf("%s ",
1125                                                        cmd_expand(cptr->c_keys[a], 0));
1126                                         }
1127                                         got = 1;
1128                                 }
1129                         }
1130                 }
1131         }
1132
1133 }
1134
1135
1136
1137
1138
1139 /*
1140  * set tty modes.  commands are:
1141  *
1142  * 01- set to Citadel mode
1143  * 2 - save current settings for later restoral
1144  * 3 - restore saved settings
1145  */
1146 #ifdef HAVE_TERMIOS_H
1147 void stty_ctdl(int cmd)
1148 {                               /* SysV version of stty_ctdl() */
1149         struct termios live;
1150         static struct termios saved_settings;
1151         static int last_cmd = 0;
1152
1153         if (cmd == SB_LAST)
1154                 cmd = last_cmd;
1155         else
1156                 last_cmd = cmd;
1157
1158         if ((cmd == 0) || (cmd == 1)) {
1159                 tcgetattr(0, &live);
1160                 live.c_iflag = ISTRIP | IXON | IXANY;
1161                 live.c_oflag = OPOST | ONLCR;
1162                 live.c_lflag = ISIG | NOFLSH;
1163
1164                 live.c_cc[VINTR] = 0;
1165                 live.c_cc[VQUIT] = 0;
1166
1167 #ifdef hpux
1168                 live.c_cc[VMIN] = 0;
1169                 live.c_cc[VTIME] = 0;
1170 #endif
1171
1172                 /* do we even need this stuff anymore? */
1173                 /* live.c_line=0; */
1174                 live.c_cc[VERASE] = 8;
1175                 live.c_cc[VKILL] = 24;
1176                 live.c_cc[VEOF] = 1;
1177                 live.c_cc[VEOL] = 255;
1178                 live.c_cc[VEOL2] = 0;
1179                 live.c_cc[VSTART] = 0;
1180                 tcsetattr(0, TCSADRAIN, &live);
1181         }
1182         if (cmd == 2) {
1183                 tcgetattr(0, &saved_settings);
1184         }
1185         if (cmd == 3) {
1186                 tcsetattr(0, TCSADRAIN, &saved_settings);
1187         }
1188
1189 }
1190 #else
1191 void stty_ctdl(int cmd)
1192 {                               /* BSD version of stty_ctdl() */
1193         struct sgttyb live;
1194         static struct sgttyb saved_settings;
1195         static int last_cmd = 0;
1196
1197         if (cmd == SB_LAST)
1198                 cmd = last_cmd;
1199         else
1200                 last_cmd = cmd;
1201
1202         if ((cmd == 0) || (cmd == 1)) {
1203                 gtty(0, &live);
1204                 live.sg_flags |= CBREAK;
1205                 live.sg_flags |= CRMOD;
1206                 live.sg_flags |= NL1;
1207                 live.sg_flags &= ~ECHO;
1208                 if (cmd == 1)
1209                         live.sg_flags |= NOFLSH;
1210                 stty(0, &live);
1211         }
1212         if (cmd == 2) {
1213                 gtty(0, &saved_settings);
1214         }
1215         if (cmd == 3) {
1216                 stty(0, &saved_settings);
1217         }
1218 }
1219 #endif
1220
1221
1222 /*
1223  * display_help()  -  help file viewer
1224  */
1225 void display_help(CtdlIPC *ipc, char *name)
1226 {
1227         formout(ipc, name);
1228 }
1229
1230
1231 /*
1232  * fmout() - Citadel text formatter and paginator
1233  */
1234 int fmout(
1235         int width,      /* screen width to use */
1236         FILE *fpin,     /* file to read from, or NULL to format given text */
1237         char *text,     /* text to be formatted (when fpin is NULL */
1238         FILE *fpout,    /* file to write to, or NULL to write to screen */
1239         int subst)      /* nonzero if we should use hypertext mode */
1240 {
1241         char *buffer = NULL;    /* The current message */
1242         char *word = NULL;      /* What we are about to actually print */
1243         char *e;                /* Pointer to position in text */
1244         char old = 0;           /* The previous character */
1245         int column = 0;         /* Current column */
1246         size_t i;               /* Generic counter */
1247
1248         /* Space for a single word, which can be at most screenwidth */
1249         word = (char *)calloc(1, width);
1250         if (!word) {
1251                 scr_printf("Can't alloc memory to print message: %s!\n",
1252                                 strerror(errno));
1253                 logoff(NULL, 3);
1254         }
1255
1256         /* Read the entire message body into memory */
1257         if (fpin) {
1258                 buffer = load_message_from_file(fpin);
1259                 if (!buffer) {
1260                         scr_printf("Can't print message: %s!\n",
1261                                         strerror(errno));
1262                         logoff(NULL, 3);
1263                 }
1264         } else {
1265                 buffer = text;
1266         }
1267         e = buffer;
1268
1269         /* Run the message body */
1270         while (*e) {
1271                 /* Catch characters that shouldn't be there at all */
1272                 if (*e == '\r') {
1273                         e++;
1274                         continue;
1275                 }
1276                 /* First, are we looking at a newline? */
1277                 if (*e == '\n') {
1278                         e++;
1279                         if (*e == ' ') {        /* Paragraph */
1280                                 if (fpout) {
1281                                         fprintf(fpout, "\n");
1282                                 } else {
1283                                         scr_printf("\n");
1284                                 }
1285                                 column = 0;
1286                         } else if (old != ' ') {/* Don't print two spaces */
1287                                 if (fpout) {
1288                                         fprintf(fpout, " ");
1289                                 } else {
1290                                         scr_printf(" ");
1291                                 }
1292                                 column++;
1293                         }
1294                         old = '\n';
1295                         continue;
1296                 }
1297
1298                 /* Are we looking at a nonprintable?
1299                  * (This section is now commented out because we could be displaying
1300                  * a character set like UTF-8 or ISO-8859-1.)
1301                 if ( (*e < 32) || (*e > 126) ) {
1302                         e++;
1303                         continue;
1304                 } */
1305
1306                 /* Or are we looking at a space? */
1307                 if (*e == ' ') {
1308                         e++;
1309                         if (column >= width - 1) {
1310                                 /* Are we in the rightmost column? */
1311                                 if (fpout) {
1312                                         fprintf(fpout, "\n");
1313                                 } else {
1314                                         scr_printf("\n");
1315                                 }
1316                                 column = 0;
1317                         } else if (!(column == 0 && old == ' ')) {
1318                                 /* Eat only the first space on a line */
1319                                 if (fpout) {
1320                                         fprintf(fpout, " ");
1321                                 } else {
1322                                         scr_printf(" ");
1323                                 }
1324                                 column++;
1325                         }
1326                         /* ONLY eat the FIRST space on a line */
1327                         old = ' ';
1328                         continue;
1329                 }
1330                 old = *e;
1331
1332                 /* Read a word, slightly messy */
1333                 i = 0;
1334                 while (e[i]) {
1335                         if (!isprint(e[i]) && !isspace(e[i]))
1336                                 e[i] = ' ';
1337                         if (isspace(e[i]))
1338                                 break;
1339                         i++;
1340                 }
1341
1342                 /* We should never see these, but... slightly messy */
1343                 if (e[i] == '\t' || e[i] == '\f' || e[i] == '\v')
1344                         e[i] = ' ';
1345
1346                 /* Break up really long words */
1347                 /* TODO: auto-hyphenation someday? */
1348                 if (i >= width)
1349                         i = width - 1;
1350                 strncpy(word, e, i);
1351                 word[i] = 0;
1352
1353                 /* Decide where to print the word */
1354                 if (column + i >= width) {
1355                         /* Wrap to the next line */
1356                         if (fpout) {
1357                                 fprintf(fpout, "\n");
1358                         } else {
1359                                 scr_printf("\n");
1360                         }
1361                         column = 0;
1362                 }
1363
1364                 /* Print the word */
1365                 if (fpout) {
1366                         fprintf(fpout, "%s", word);
1367                 } else {
1368                         scr_printf("%s", word);
1369                 }
1370                 column += i;
1371                 e += i;         /* Start over with the whitepsace! */
1372         }
1373
1374         free(word);
1375         if (fpin)               /* We allocated this, remember? */
1376                 free(buffer);
1377
1378         /* Is this necessary?  It makes the output kind of spacey. */
1379         if (fpout) {
1380                 fprintf(fpout, "\n");
1381         } else {
1382                 scr_printf("\n");
1383         }
1384
1385         return sigcaught;
1386 }
1387
1388
1389 /*
1390  * support ANSI color if defined
1391  */
1392 void color(int colornum)
1393 {
1394         static int hold_color;
1395         static int current_color;
1396
1397         if (colornum == COLOR_PUSH) {
1398                 hold_color = current_color;
1399                 return;
1400         }
1401
1402         if (colornum == COLOR_POP) {
1403                 color(hold_color);
1404                 return;
1405         }
1406
1407         current_color = colornum;
1408         if (enable_color) {
1409                 /* When switching to dim white, actually output an 'original
1410                  * pair' sequence -- this looks better on black-on-white
1411                  * terminals. - Changed to ORIGINAL_PAIR as this actually
1412                  * wound up looking horrible on black-on-white terminals, not
1413                  * to mention transparent terminals.
1414                  */
1415                 if (colornum == ORIGINAL_PAIR)
1416                         printf("\033[0;39;49m");
1417                 else
1418                         printf("\033[%d;3%d;4%dm",
1419                                         (colornum & 8) ? 1 : 0,
1420                                         (colornum & 7),
1421                                         rc_color_use_bg);
1422
1423         }
1424 }
1425
1426 void cls(int colornum)
1427 {
1428         if (enable_color) {
1429                 printf("\033[4%dm\033[2J\033[H\033[0m",
1430                                 colornum ? colornum : rc_color_use_bg);
1431         }
1432 }
1433
1434
1435 /*
1436  * Detect whether ANSI color is available (answerback)
1437  */
1438 void send_ansi_detect(void)
1439 {
1440         if (rc_ansi_color == 2) {
1441                 printf("\033[c");
1442                 scr_flush();
1443                 time(&AnsiDetect);
1444         }
1445 }
1446
1447 void look_for_ansi(void)
1448 {
1449         fd_set rfds;
1450         struct timeval tv;
1451         char abuf[512];
1452         time_t now;
1453         int a, rv;
1454
1455         if (rc_ansi_color == 0) {
1456                 enable_color = 0;
1457         } else if (rc_ansi_color == 1) {
1458                 enable_color = 1;
1459         } else if (rc_ansi_color == 2) {
1460
1461                 /* otherwise, do the auto-detect */
1462
1463                 strcpy(abuf, "");
1464
1465                 time(&now);
1466                 if ((now - AnsiDetect) < 2)
1467                         sleep(1);
1468
1469                 do {
1470                         FD_ZERO(&rfds);
1471                         FD_SET(0, &rfds);
1472                         tv.tv_sec = 0;
1473                         tv.tv_usec = 1;
1474
1475                         select(1, &rfds, NULL, NULL, &tv);
1476                         if (FD_ISSET(0, &rfds)) {
1477                                 abuf[strlen(abuf) + 1] = 0;
1478                                 rv = read(0, &abuf[strlen(abuf)], 1);
1479                         }
1480                 } while (FD_ISSET(0, &rfds));
1481
1482                 for (a = 0; !IsEmptyStr(&abuf[a]); ++a) {
1483                         if ((abuf[a] == 27) && (abuf[a + 1] == '[')
1484                             && (abuf[a + 2] == '?')) {
1485                                 enable_color = 1;
1486                         }
1487                 }
1488         }
1489 }
1490
1491
1492 /*
1493  * Display key options (highlight hotkeys inside angle brackets)
1494  */
1495 void keyopt(char *buf) {
1496         int i;
1497
1498         color(DIM_WHITE);
1499         for (i=0; !IsEmptyStr(&buf[i]); ++i) {
1500                 if (buf[i]=='<') {
1501                         scr_printf("%c", buf[i]);
1502                         color(BRIGHT_MAGENTA);
1503                 } else {
1504                         if (buf[i]=='>'&& buf[i+1] != '>') {
1505                                 color(DIM_WHITE);
1506                         }
1507                         scr_printf("%c", buf[i]);
1508                 }
1509         }
1510         color(DIM_WHITE);
1511 }
1512
1513
1514
1515 /*
1516  * Present a key-menu line choice type of thing
1517  */
1518 char keymenu(char *menuprompt, char *menustring) {
1519         int i, c, a;
1520         int choices;
1521         int do_prompt = 0;
1522         char buf[1024];
1523         int ch;
1524         int display_prompt = 1;
1525
1526         choices = num_tokens(menustring, '|');
1527
1528         if (menuprompt != NULL) do_prompt = 1;
1529         if ((menuprompt != NULL) && (IsEmptyStr(menuprompt))) do_prompt = 0;
1530
1531         while (1) {
1532                 if (display_prompt) {
1533                         if (do_prompt) {
1534                                 scr_printf("%s ", menuprompt);
1535                         }
1536                         else {
1537                                 for (i=0; i<choices; ++i) {
1538                                         extract_token(buf, menustring, i, '|', sizeof buf);
1539                                         keyopt(buf);
1540                                         scr_printf(" ");
1541                                 }
1542                         }
1543                         scr_printf("-> ");
1544                         display_prompt = 0;
1545                 }
1546                 ch = lkey();
1547
1548                 if ( (do_prompt) && (ch=='?') ) {
1549                         scr_printf("\rOne of...                               ");
1550                         scr_printf("                                      \n");
1551                         for (i=0; i<choices; ++i) {
1552                                 extract_token(buf, menustring, i, '|', sizeof buf);
1553                                 scr_printf("   ");
1554                                 keyopt(buf);
1555                                 scr_printf("\n");
1556                         }
1557                         scr_printf("\n");
1558                         display_prompt = 1;
1559                 }
1560
1561                 for (i=0; i<choices; ++i) {
1562                         extract_token(buf, menustring, i, '|', sizeof buf);
1563                         for (c=1; !IsEmptyStr(&buf[c]); ++c) {
1564                                 if ( (ch == tolower(buf[c]))
1565                                    && (buf[c-1]=='<')
1566                                    && (buf[c+1]=='>') ) {
1567                                         for (a=0; !IsEmptyStr(&buf[a]); ++a) {
1568                                                 if ( (a!=(c-1)) && (a!=(c+1))) {
1569                                                         scr_putc(buf[a]);
1570                                                 }
1571                                         }
1572                                         scr_printf("\n");
1573                                         return ch;
1574                                 }
1575                         }
1576                 }
1577         }
1578 }