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 ((retval > 0) && 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
 288         time(&idlet);
 289
 290         /* This may sometimes get called before we are actually connected
 291          * to the server.  Don't do anything if we aren't connected. -IO
 292          */
 293         if (!ipc_for_signal_handlers)
 294                 return;
 295
 296         /* If full keepalives are enabled, send a NOOP to the server and
 297          * wait for a response.
 298          */
 299         if (keepalives_enabled == KA_YES) {
 300                 CtdlIPCNoop(ipc_for_signal_handlers);
 301                 if (instant_msgs > 0) {
 302                         if (ok_to_interrupt == 1) {
 303                                 scr_printf("\r%64s\r", "");
 304                                 print_instant();
 305                                 scr_printf("%s%c ", room_name,
 306                                        room_prompt(room_flags));
 307                                 scr_flush();
 308                         }
 309                 }
 310         }
 311
 312         /* If half keepalives are enabled, send a QNOP to the server (if the
 313          * server supports it) and then do nothing.
 314          */
 315         if ( (keepalives_enabled == KA_HALF)
 316            && (ipc_for_signal_handlers->ServInfo.supports_qnop > 0) ) {
 317                 CtdlIPC_chat_send(ipc_for_signal_handlers, "QNOP");
 318         }
 319 }
 320
 321 /* threaded nonblocking keepalive stuff starts here. I'm going for a simple
 322    encapsulated interface; in theory there should be no need to touch these
 323    globals outside of the async_ka_* functions. */
 324
 325 #ifdef THREADED_CLIENT
 326 static pthread_t ka_thr_handle;
 327 static int ka_thr_active = 0;
 328 static int async_ka_enabled = 0;
 329
 330 static void *ka_thread(void *arg)
 331 {
 332 #ifdef HAVE_BACKTRACE
 333         char threadName[256];
 334
 335         // Set up our name
 336         sprintf(threadName, "ka_Thread n");
 337
 338         // Register for tracing
 339         eCrash_RegisterThread(threadName, 0);
 340 #endif
 341         really_do_keepalive();
 342         pthread_detach(ka_thr_handle);
 343         ka_thr_active = 0;
 344
 345 #ifdef HAVE_BACKTRACE
 346         eCrash_UnregisterThread();
 347 #endif
 348         return NULL;
 349 }
 350
 351 /* start up a thread to handle a keepalive in the background */
 352 static void async_ka_exec(void)
 353 {
 354         if (!ka_thr_active) {
 355                 ka_thr_active = 1;
 356                 if (pthread_create(&ka_thr_handle, NULL, ka_thread, NULL)) {
 357                         perror("pthread_create");
 358                         exit(1);
 359                 }
 360         }
 361 }
 362 #endif /* THREADED_CLIENT */
 363
 364 /* I changed this from static to not because I need to call it from
 365    screen.c, either that or make something in screen.c not static.
 366    Fix it how you like. Why all the staticness? stu */
 367
 368 void do_keepalive(void)
 369 {
 370         time_t now;
 371
 372         time(&now);
 373         if ((now - idlet) < ((long) S_KEEPALIVE))
 374                 return;
 375
 376         /* Do a space-backspace to keep telnet sessions from idling out */
 377         scr_printf(" %c", 8);
 378         scr_flush();
 379
 380 #ifdef THREADED_CLIENT
 381         if (async_ka_enabled)
 382                 async_ka_exec();
 383         else
 384 #endif
 385                 really_do_keepalive();
 386 }
 387
 388
 389 /* Now the actual async-keepalve API that we expose to higher levels:
 390    async_ka_start() and async_ka_end(). These do nothing when we don't have
 391    threading enabled, so we avoid sprinkling ifdef's throughout the code. */
 392
 393 /* wait for a background keepalive to complete. this must be done before
 394    attempting any further server requests! */
 395 void async_ka_end(void)
 396 {
 397 #ifdef THREADED_CLIENT
 398         if (ka_thr_active)
 399                 pthread_join(ka_thr_handle, NULL);
 400
 401         async_ka_enabled--;
 402 #endif
 403 }
 404
 405 /* tell do_keepalive() that keepalives are asynchronous. */
 406 void async_ka_start(void)
 407 {
 408 #ifdef THREADED_CLIENT
 409         async_ka_enabled++;
 410 #endif
 411 }
 412
 413
 414 int inkey(void)
 415 {                               /* get a character from the keyboard, with   */
 416         int a;                  /* the watchdog timer in effect if necessary */
 417         fd_set rfds;
 418         struct timeval tv;
 419         time_t start_time;
 420
 421         scr_flush();
 422         time(&start_time);
 423
 424         do {
 425                 /* This loop waits for keyboard input.  If the keepalive
 426                  * timer expires, it sends a keepalive to the server if
 427                  * necessary and then waits again.
 428                  */
 429                 do {
 430                         do_keepalive();
 431
 432                         FD_ZERO(&rfds);
 433                         FD_SET(0, &rfds);
 434                         tv.tv_sec = S_KEEPALIVE;
 435                         tv.tv_usec = 0;
 436
 437                         select(1, &rfds, NULL, NULL, &tv);
 438                 } while (!FD_ISSET(0, &rfds));
 439
 440                 /* At this point, there's input, so fetch it.
 441                  * (There's a hole in the bucket...)
 442                  */
 443                 a = scr_getc(SCR_BLOCK);
 444                 if (a == 127) {
 445                         a = 8;
 446                 }
 447                 if (a == 13) {
 448                         a = 10;
 449                 }
 450         } while (a == 0);
 451         return (a);
 452 }
 453
 454
 455 int yesno(void)
 456 {                               /* Returns 1 for yes, 0 for no */
 457         int a;
 458         while (1) {
 459                 a = inkey();
 460                 a = tolower(a);
 461                 if (a == 'y') {
 462                         scr_printf("Yes\n");
 463                         return (1);
 464                 }
 465                 if (a == 'n') {
 466                         scr_printf("No\n");
 467                         return (0);
 468                 }
 469         }
 470 }
 471
 472 /* Returns 1 for yes, 0 for no, arg is default value */
 473 int yesno_d(int d)
 474 {
 475         int a;
 476         while (1) {
 477                 a = inkey();
 478                 a = tolower(a);
 479                 if (a == 10)
 480                         a = (d ? 'y' : 'n');
 481                 if (a == 'y') {
 482                         scr_printf("Yes\n");
 483                         return (1);
 484                 }
 485                 if (a == 'n') {
 486                         scr_printf("No\n");
 487                         return (0);
 488                 }
 489         }
 490 }
 491
 492
 493
 494
 495 /* Gets a line from the terminal */
 496 /* string == Pointer to string buffer */
 497 /* lim == Maximum length - if negative, no-show */
 498 void ctdl_getline(char *string, int lim)
 499 {
 500         int a, b;
 501         char flag = 0;
 502
 503         if (lim < 0) {
 504                 lim = (0 - lim);
 505                 flag = 1;
 506         }
 507         strcpy(string, "");
 508         gl_string = string;
 509         async_ka_start();
 510
 511 GLA:    a = inkey();
 512         /* a = (a & 127); ** commented out because it isn't just an ASCII world anymore */
 513         if ((a == 8 || a == 23) && (IsEmptyStr(string)))
 514                 goto GLA;
 515         if ((a != 10) && (a != 8) && (strlen(string) == lim))
 516                 goto GLA;
 517         if ((a == 8) && (string[0] != 0)) {
 518                 string[strlen(string) - 1] = 0;
 519                 scr_putc(8); scr_putc(32); scr_putc(8);
 520                 goto GLA;
 521         }
 522         if ((a == 23) && (string[0] != 0)) {
 523                 do {
 524                         string[strlen(string) - 1] = 0;
 525                         scr_putc(8); scr_putc(32); scr_putc(8);
 526                 } while (!IsEmptyStr(string) && string[strlen(string) - 1] != ' ');
 527                 goto GLA;
 528         }
 529         if ((a == 10)) {
 530                 scr_putc(10);
 531                 async_ka_end();
 532                 return;
 533         }
 534         if (a < 32)
 535                 a = '.';
 536         b = strlen(string);
 537         string[b] = a;
 538         string[b + 1] = 0;
 539         if (flag == 0)
 540                 scr_putc(a);
 541         if (flag == 1)
 542                 scr_putc('*');
 543         goto GLA;
 544 }
 545
 546
 547 /*
 548  * strprompt()  -  prompt for a string, print the existing value and
 549  *                 allow the user to press return to keep it...
 550  */
 551 void strprompt(char *prompt, char *str, int len)
 552 {
 553         int i;
 554         char buf[128];
 555
 556         print_instant();
 557         color(DIM_WHITE);
 558         scr_printf("%s ", prompt);
 559         color(DIM_MAGENTA);
 560         scr_printf("[");
 561         color(BRIGHT_MAGENTA);
 562
 563         if (len >= 0) {
 564                 scr_printf("%s", str);
 565         }
 566         else {
 567                 for (i=0; !IsEmptyStr(&str[i]); ++i) {
 568                         scr_printf("*");
 569                 }
 570         }
 571
 572         color(DIM_MAGENTA);
 573         scr_printf("]");
 574         color(DIM_WHITE);
 575         scr_printf(": ");
 576         color(BRIGHT_CYAN);
 577         ctdl_getline(buf, len);
 578         if (buf[0] != 0)
 579                 strcpy(str, buf);
 580         color(DIM_WHITE);
 581 }
 582
 583 /*
 584  * boolprompt()  -  prompt for a yes/no, print the existing value and
 585  *                  allow the user to press return to keep it...
 586  */
 587 int boolprompt(char *prompt, int prev_val)
 588 {
 589         int r;
 590
 591         color(DIM_WHITE);
 592         scr_printf("%s ", prompt);
 593         color(DIM_MAGENTA);
 594         scr_printf("[");
 595         color(BRIGHT_MAGENTA);
 596         scr_printf("%s", (prev_val ? "Yes" : "No"));
 597         color(DIM_MAGENTA);
 598         scr_printf("]: ");
 599         color(BRIGHT_CYAN);
 600         r = (yesno_d(prev_val));
 601         color(DIM_WHITE);
 602         return r;
 603 }
 604
 605 /*
 606  * intprompt()  -  like strprompt(), except for an integer
 607  *                 (note that it RETURNS the new value!)
 608  */
 609 int intprompt(char *prompt, int ival, int imin, int imax)
 610 {
 611         char buf[16];
 612         int i;
 613         int p;
 614
 615         do {
 616                 i = ival;
 617                 snprintf(buf, sizeof buf, "%d", i);
 618                 strprompt(prompt, buf, 15);
 619                 i = atoi(buf);
 620                 for (p=0; !IsEmptyStr(&buf[p]); ++p) {
 621                         if ( (!isdigit(buf[p]))
 622                            && ( (buf[p]!='-') || (p!=0) )  )
 623                                 i = imin - 1;
 624                 }
 625                 if (i < imin)
 626                         scr_printf("*** Must be no less than %d.\n", imin);
 627                 if (i > imax)
 628                         scr_printf("*** Must be no more than %d.\n", imax);
 629         } while ((i < imin) || (i > imax));
 630         return (i);
 631 }
 632
 633 /*
 634  * newprompt()  -  prompt for a string with no existing value
 635  *                 (clears out string buffer first)
 636  */
 637 void newprompt(char *prompt, char *str, int len)
 638 {
 639         color(BRIGHT_MAGENTA);
 640         scr_printf("%s", prompt);
 641         color(DIM_MAGENTA);
 642         ctdl_getline(str, len);
 643         color(DIM_WHITE);
 644 }
 645
 646
 647 int lkey(void)
 648 {                               /* returns a lower case value */
 649         int a;
 650         a = inkey();
 651         if (isupper(a))
 652                 a = tolower(a);
 653         return (a);
 654 }
 655
 656 /*
 657  * parse the citadel.rc file
 658  */
 659 void load_command_set(void)
 660 {
 661         FILE *ccfile;
 662         char buf[1024];
 663         char editor_key[100];
 664         struct citcmd *cptr;
 665         struct citcmd *lastcmd = NULL;
 666         int a, d;
 667         int b = 0;
 668         int i;
 669
 670
 671         /* first, set up some defaults for non-required variables */
 672
 673         for (i = 0; i < MAX_EDITORS; i++)
 674                 strcpy(editor_paths[i], "");
 675         strcpy(printcmd, "");
 676         strcpy(imagecmd, "");
 677         strcpy(rc_username, "");
 678         strcpy(rc_password, "");
 679         rc_floor_mode = 0;
 680         rc_exp_beep = 1;
 681         rc_allow_attachments = 0;
 682         rc_remember_passwords = 0;
 683         strcpy(rc_exp_cmd, "");
 684         rc_display_message_numbers = 0;
 685         rc_force_mail_prompts = 0;
 686         rc_ansi_color = 0;
 687         rc_color_use_bg = 0;
 688         strcpy(rc_url_cmd, "");
 689         strcpy(rc_open_cmd, "");
 690         strcpy(rc_gotmail_cmd, "");
 691 #ifdef HAVE_OPENSSL
 692         rc_encrypt = RC_DEFAULT;
 693 #endif
 694         rc_alt_semantics = 0;
 695
 696         /* now try to open the citadel.rc file */
 697
 698         ccfile = NULL;
 699         if (getenv("HOME") != NULL) {
 700                 snprintf(buf, sizeof buf, "%s/.citadelrc", getenv("HOME"));
 701                 ccfile = fopen(buf, "r");
 702         }
 703         if (ccfile == NULL) {
 704                 ccfile = fopen(file_citadel_rc, "r");
 705         }
 706         if (ccfile == NULL) {
 707                 ccfile = fopen("/etc/citadel.rc", "r");
 708         }
 709         if (ccfile == NULL) {
 710                 ccfile = fopen("./citadel.rc", "r");
 711         }
 712         if (ccfile == NULL) {
 713                 perror("commands: cannot open citadel.rc");
 714                 logoff(NULL, 3);
 715         }
 716         while (fgets(buf, sizeof buf, ccfile) != NULL) {
 717                 while ((!IsEmptyStr(buf)) ? (isspace(buf[strlen(buf) - 1])) : 0)
 718                         buf[strlen(buf) - 1] = 0;
 719
 720                 if (!strncasecmp(buf, "encrypt=", 8)) {
 721                         if (!strcasecmp(&buf[8], "yes")) {
 722 #ifdef HAVE_OPENSSL
 723                                 rc_encrypt = RC_YES;
 724 #else
 725                                 fprintf(stderr, "citadel.rc requires encryption support but citadel is not compiled with OpenSSL");
 726                                 logoff(NULL, 3);
 727 #endif
 728                         }
 729 #ifdef HAVE_OPENSSL
 730                         else if (!strcasecmp(&buf[8], "no")) {
 731                                 rc_encrypt = RC_NO;
 732                         }
 733                         else if (!strcasecmp(&buf[8], "default")) {
 734                                 rc_encrypt = RC_DEFAULT;
 735                         }
 736 #endif
 737                 }
 738
 739                 if (!strncasecmp(buf, "editor=", 7))
 740                         strcpy(editor_paths[0], &buf[7]);
 741
 742                 for (i = 0; i < MAX_EDITORS; i++)
 743                 {
 744                         sprintf(editor_key, "editor%d=", i);
 745                         if (!strncasecmp(buf, editor_key, strlen(editor_key)))
 746                                 strcpy(editor_paths[i], &buf[strlen(editor_key)]);
 747                 }
 748
 749                 if (!strncasecmp(buf, "printcmd=", 9))
 750                         strcpy(printcmd, &buf[9]);
 751
 752                 if (!strncasecmp(buf, "imagecmd=", 9))
 753                         strcpy(imagecmd, &buf[9]);
 754
 755                 if (!strncasecmp(buf, "expcmd=", 7))
 756                         strcpy(rc_exp_cmd, &buf[7]);
 757
 758                 if (!strncasecmp(buf, "local_screen_dimensions=", 24))
 759                         have_xterm = (char) atoi(&buf[24]);
 760
 761                 if (!strncasecmp(buf, "use_floors=", 11)) {
 762                         if (!strcasecmp(&buf[11], "yes"))
 763                                 rc_floor_mode = RC_YES;
 764                         if (!strcasecmp(&buf[11], "no"))
 765                                 rc_floor_mode = RC_NO;
 766                         if (!strcasecmp(&buf[11], "default"))
 767                                 rc_floor_mode = RC_DEFAULT;
 768                 }
 769                 if (!strncasecmp(buf, "beep=", 5)) {
 770                         rc_exp_beep = atoi(&buf[5]);
 771                 }
 772                 if (!strncasecmp(buf, "allow_attachments=", 18)) {
 773                         rc_allow_attachments = atoi(&buf[18]);
 774                 }
 775                 if (!strncasecmp(buf, "idle_threshold=", 15)) {
 776                         rc_idle_threshold = atol(&buf[15]);
 777                 }
 778                 if (!strncasecmp(buf, "remember_passwords=", 19)) {
 779                         rc_remember_passwords = atoi(&buf[19]);
 780                 }
 781                 if (!strncasecmp(buf, "display_message_numbers=", 24)) {
 782                         rc_display_message_numbers = atoi(&buf[24]);
 783                 }
 784                 if (!strncasecmp(buf, "force_mail_prompts=", 19)) {
 785                         rc_force_mail_prompts = atoi(&buf[19]);
 786                 }
 787                 if (!strncasecmp(buf, "ansi_color=", 11)) {
 788                         if (!strncasecmp(&buf[11], "on", 2))
 789                                 rc_ansi_color = 1;
 790                         if (!strncasecmp(&buf[11], "auto", 4))
 791                                 rc_ansi_color = 2;      /* autodetect */
 792                         if (!strncasecmp(&buf[11], "user", 4))
 793                                 rc_ansi_color = 3;      /* user config */
 794                 }
 795                 if (!strncasecmp(buf, "use_background=", 15)) {
 796                         if (!strncasecmp(&buf[15], "on", 2))
 797                                 rc_color_use_bg = 9;
 798                 }
 799                 if (!strncasecmp(buf, "prompt_control=", 15)) {
 800                         if (!strncasecmp(&buf[15], "on", 2))
 801                                 rc_prompt_control = 1;
 802                         if (!strncasecmp(&buf[15], "user", 4))
 803                                 rc_prompt_control = 3;  /* user config */
 804                 }
 805                 if (!strncasecmp(buf, "username=", 9))
 806                         strcpy(rc_username, &buf[9]);
 807
 808                 if (!strncasecmp(buf, "password=", 9))
 809                         strcpy(rc_password, &buf[9]);
 810
 811                 if (!strncasecmp(buf, "urlcmd=", 7))
 812                         strcpy(rc_url_cmd, &buf[7]);
 813
 814                 if (!strncasecmp(buf, "opencmd=", 7))
 815                         strcpy(rc_open_cmd, &buf[8]);
 816
 817                 if (!strncasecmp(buf, "gotmailcmd=", 11))
 818                         strcpy(rc_gotmail_cmd, &buf[11]);
 819
 820                 if (!strncasecmp(buf, "alternate_semantics=", 20)) {
 821                         if (!strncasecmp(&buf[20], "yes", 3)) {
 822                                 rc_alt_semantics = 1;
 823                         }
 824                         else {
 825                                 rc_alt_semantics = 0;
 826                         }
 827                 }
 828
 829                 if (!strncasecmp(buf, "cmd=", 4)) {
 830                         strcpy(buf, &buf[4]);
 831
 832                         cptr = (struct citcmd *) malloc(sizeof(struct citcmd));
 833
 834                         cptr->c_cmdnum = atoi(buf);
 835                         for (d = strlen(buf); d >= 0; --d)
 836                                 if (buf[d] == ',')
 837                                         b = d;
 838                         strcpy(buf, &buf[b + 1]);
 839
 840                         cptr->c_axlevel = atoi(buf);
 841                         for (d = strlen(buf); d >= 0; --d)
 842                                 if (buf[d] == ',')
 843                                         b = d;
 844                         strcpy(buf, &buf[b + 1]);
 845
 846                         for (a = 0; a < 5; ++a)
 847                                 cptr->c_keys[a][0] = 0;
 848
 849                         a = 0;
 850                         b = 0;
 851                         buf[strlen(buf) + 1] = 0;
 852                         while (!IsEmptyStr(buf)) {
 853                                 b = strlen(buf);
 854                                 for (d = strlen(buf); d >= 0; --d)
 855                                         if (buf[d] == ',')
 856                                                 b = d;
 857                                 strncpy(cptr->c_keys[a], buf, b);
 858                                 cptr->c_keys[a][b] = 0;
 859                                 if (buf[b] == ',')
 860                                         strcpy(buf, &buf[b + 1]);
 861                                 else
 862                                         strcpy(buf, "");
 863                                 ++a;
 864                         }
 865
 866                         cptr->next = NULL;
 867                         if (cmdlist == NULL)
 868                                 cmdlist = cptr;
 869                         else
 870                                 lastcmd->next = cptr;
 871                         lastcmd = cptr;
 872                 }
 873         }
 874         fclose(ccfile);
 875 }
 876
 877
 878
 879 /*
 880  * return the key associated with a command
 881  */
 882 char keycmd(char *cmdstr)
 883 {
 884         int a;
 885
 886         for (a = 0; !IsEmptyStr(&cmdstr[a]); ++a)
 887                 if (cmdstr[a] == '&')
 888                         return (tolower(cmdstr[a + 1]));
 889         return (0);
 890 }
 891
 892
 893 /*
 894  * Output the string from a key command without the ampersand
 895  * "mode" should be set to 0 for normal or 1 for <C>ommand key highlighting
 896  */
 897 char *cmd_expand(char *strbuf, int mode)
 898 {
 899         int a;
 900         static char exp[64];
 901         char buf[1024];
 902
 903         strcpy(exp, strbuf);
 904
 905         for (a = 0; exp[a]; ++a) {
 906                 if (strbuf[a] == '&') {
 907
 908                         /* dont echo these non mnemonic command keys */
 909                         int noecho = strbuf[a+1] == '<' || strbuf[a+1] == '>' || strbuf[a+1] == '+' || strbuf[a+1] == '-';
 910
 911                         if (mode == 0) {
 912                                 strcpy(&exp[a], &exp[a + 1 + noecho]);
 913                         }
 914                         if (mode == 1) {
 915                                 exp[a] = '<';
 916                                 strcpy(buf, &exp[a + 2]);
 917                                 exp[a + 2] = '>';
 918                                 exp[a + 3] = 0;
 919                                 strcat(exp, buf);
 920                         }
 921                 }
 922                 if (!strncmp(&exp[a], "^r", 2)) {
 923                         strcpy(buf, exp);
 924                         strcpy(&exp[a], room_name);
 925                         strcat(exp, &buf[a + 2]);
 926                 }
 927                 if (!strncmp(&exp[a], "^c", 2)) {
 928                         exp[a] = ',';
 929                         strcpy(&exp[a + 1], &exp[a + 2]);
 930                 }
 931         }
 932
 933         return (exp);
 934 }
 935
 936
 937
 938 /*
 939  * Comparison function to determine if entered commands match a
 940  * command loaded from the config file.
 941  */
 942 int cmdmatch(char *cmdbuf, struct citcmd *cptr, int ncomp)
 943 {
 944         int a;
 945         int cmdax;
 946
 947         cmdax = 0;
 948         if (is_room_aide)
 949                 cmdax = 1;
 950         if (axlevel >= 6)
 951                 cmdax = 2;
 952
 953         for (a = 0; a < ncomp; ++a) {
 954                 if ((tolower(cmdbuf[a]) != keycmd(cptr->c_keys[a]))
 955                     || (cptr->c_axlevel > cmdax))
 956                         return (0);
 957         }
 958         return (1);
 959 }
 960
 961
 962 /*
 963  * This function returns 1 if a given command requires a string input
 964  */
 965 int requires_string(struct citcmd *cptr, int ncomp)
 966 {
 967         int a;
 968         char buf[64];
 969
 970         strcpy(buf, cptr->c_keys[ncomp - 1]);
 971         for (a = 0; !IsEmptyStr(&buf[a]); ++a) {
 972                 if (buf[a] == ':')
 973                         return (1);
 974         }
 975         return (0);
 976 }
 977
 978
 979 /*
 980  * Input a command at the main prompt.
 981  * This function returns an integer command number.  If the command prompts
 982  * for a string then it is placed in the supplied buffer.
 983  */
 984 int getcmd(CtdlIPC *ipc, char *argbuf)
 985 {
 986         char cmdbuf[5];
 987         int cmdspaces[5];
 988         int cmdpos;
 989         int ch;
 990         int a;
 991         int got;
 992         int this_lazy_cmd;
 993         struct citcmd *cptr;
 994
 995         /*
 996          * Starting a new command now, so set sigcaught to 0.  This variable
 997          * is set to nonzero (usually NEXT_KEY or STOP_KEY) if a command has
 998          * been interrupted by a keypress.
 999          */
1000         sigcaught = 0;
1001
1002         /* Switch color support on or off if we're in user mode */
1003         if (rc_ansi_color == 3) {
1004                 if (userflags & US_COLOR)
1005                         enable_color = 1;
1006                 else
1007                         enable_color = 0;
1008         }
1009         /* if we're running in idiot mode, display a cute little menu */
1010         IFNEXPERT formout(ipc, "mainmenu");
1011
1012         print_instant();
1013         strcpy(argbuf, "");
1014         cmdpos = 0;
1015         for (a = 0; a < 5; ++a)
1016                 cmdbuf[a] = 0;
1017         /* now the room prompt... */
1018         ok_to_interrupt = 1;
1019         color(BRIGHT_WHITE);
1020         scr_printf("\n%s", room_name);
1021         color(DIM_WHITE);
1022         scr_printf("%c ", room_prompt(room_flags));
1023
1024         while (1) {
1025                 ch = inkey();
1026                 ok_to_interrupt = 0;
1027
1028                 /* Handle the backspace key, but only if there's something
1029                  * to backspace over...
1030                  */
1031                 if ((ch == 8) && (cmdpos > 0)) {
1032                         back(cmdspaces[cmdpos - 1] + 1);
1033                         cmdbuf[cmdpos] = 0;
1034                         --cmdpos;
1035                 }
1036                 /* Spacebar invokes "lazy traversal" commands */
1037                 if ((ch == 32) && (cmdpos == 0)) {
1038                         this_lazy_cmd = next_lazy_cmd;
1039                         if (this_lazy_cmd == 13)
1040                                 next_lazy_cmd = 5;
1041                         if (this_lazy_cmd == 5)
1042                                 next_lazy_cmd = 13;
1043                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1044                                 if (cptr->c_cmdnum == this_lazy_cmd) {
1045                                         for (a = 0; a < 5; ++a)
1046                                                 if (cptr->c_keys[a][0] != 0)
1047                                                         scr_printf("%s ", cmd_expand(
1048                                                                                         cptr->c_keys[a], 0));
1049                                         scr_printf("\n");
1050                                         return (this_lazy_cmd);
1051                                 }
1052                         }
1053                         scr_printf("\n");
1054                         return (this_lazy_cmd);
1055                 }
1056                 /* Otherwise, process the command */
1057                 cmdbuf[cmdpos] = tolower(ch);
1058
1059                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1060                         if (cmdmatch(cmdbuf, cptr, cmdpos + 1)) {
1061
1062                                 scr_printf("%s", cmd_expand(cptr->c_keys[cmdpos], 0));
1063                                 cmdspaces[cmdpos] = strlen(
1064                                     cmd_expand(cptr->c_keys[cmdpos], 0));
1065                                 if (cmdpos < 4)
1066                                         if ((cptr->c_keys[cmdpos + 1]) != 0)
1067                                                 scr_putc(' ');
1068                                 ++cmdpos;
1069                         }
1070                 }
1071
1072                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1073                         if (cmdmatch(cmdbuf, cptr, 5)) {
1074                                 /* We've found our command. */
1075                                 if (requires_string(cptr, cmdpos)) {
1076                                         ctdl_getline(argbuf, 64);
1077                                 } else {
1078                                         scr_printf("\n");
1079                                 }
1080
1081                                 /* If this command is one that changes rooms,
1082                                  * then the next lazy-command (space bar)
1083                                  * should be "read new" instead of "goto"
1084                                  */
1085                                 if ((cptr->c_cmdnum == 5)
1086                                     || (cptr->c_cmdnum == 6)
1087                                     || (cptr->c_cmdnum == 47)
1088                                     || (cptr->c_cmdnum == 52)
1089                                     || (cptr->c_cmdnum == 16)
1090                                     || (cptr->c_cmdnum == 20))
1091                                         next_lazy_cmd = 13;
1092
1093                                 /* If this command is "read new"
1094                                  * then the next lazy-command (space bar)
1095                                  * should be "goto"
1096                                  */
1097                                 if (cptr->c_cmdnum == 13)
1098                                         next_lazy_cmd = 5;
1099
1100                                 return (cptr->c_cmdnum);
1101
1102                         }
1103                 }
1104
1105                 if (ch == '?') {
1106                         scr_printf("\rOne of ...                         \n");
1107                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1108                                 if (cmdmatch(cmdbuf, cptr, cmdpos)) {
1109                                         for (a = 0; a < 5; ++a) {
1110                                            keyopt(cmd_expand(cptr->c_keys[a], 1));
1111                                    scr_printf(" ");
1112                                         }
1113                                         scr_printf("\n");
1114                                 }
1115                         }
1116                 sigcaught = 0;
1117
1118                         scr_printf("\n%s%c ", room_name, room_prompt(room_flags));
1119                         got = 0;
1120                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1121                                 if ((got == 0) && (cmdmatch(cmdbuf, cptr, cmdpos))) {
1122                                         for (a = 0; a < cmdpos; ++a) {
1123                                                 scr_printf("%s ",
1124                                                        cmd_expand(cptr->c_keys[a], 0));
1125                                         }
1126                                         got = 1;
1127                                 }
1128                         }
1129                 }
1130         }
1131
1132 }
1133
1134
1135
1136
1137
1138 /*
1139  * set tty modes.  commands are:
1140  *
1141  * 01- set to Citadel mode
1142  * 2 - save current settings for later restoral
1143  * 3 - restore saved settings
1144  */
1145 #ifdef HAVE_TERMIOS_H
1146 void stty_ctdl(int cmd)
1147 {                               /* SysV version of stty_ctdl() */
1148         struct termios live;
1149         static struct termios saved_settings;
1150         static int last_cmd = 0;
1151
1152         if (cmd == SB_LAST)
1153                 cmd = last_cmd;
1154         else
1155                 last_cmd = cmd;
1156
1157         if ((cmd == 0) || (cmd == 1)) {
1158                 tcgetattr(0, &live);
1159                 live.c_iflag = ISTRIP | IXON | IXANY;
1160                 live.c_oflag = OPOST | ONLCR;
1161                 live.c_lflag = ISIG | NOFLSH;
1162
1163                 live.c_cc[VINTR] = 0;
1164                 live.c_cc[VQUIT] = 0;
1165
1166 #ifdef hpux
1167                 live.c_cc[VMIN] = 0;
1168                 live.c_cc[VTIME] = 0;
1169 #endif
1170
1171                 /* do we even need this stuff anymore? */
1172                 /* live.c_line=0; */
1173                 live.c_cc[VERASE] = 8;
1174                 live.c_cc[VKILL] = 24;
1175                 live.c_cc[VEOF] = 1;
1176                 live.c_cc[VEOL] = 255;
1177                 live.c_cc[VEOL2] = 0;
1178                 live.c_cc[VSTART] = 0;
1179                 tcsetattr(0, TCSADRAIN, &live);
1180         }
1181         if (cmd == 2) {
1182                 tcgetattr(0, &saved_settings);
1183         }
1184         if (cmd == 3) {
1185                 tcsetattr(0, TCSADRAIN, &saved_settings);
1186         }
1187
1188 }
1189 #else
1190 void stty_ctdl(int cmd)
1191 {                               /* BSD version of stty_ctdl() */
1192         struct sgttyb live;
1193         static struct sgttyb saved_settings;
1194         static int last_cmd = 0;
1195
1196         if (cmd == SB_LAST)
1197                 cmd = last_cmd;
1198         else
1199                 last_cmd = cmd;
1200
1201         if ((cmd == 0) || (cmd == 1)) {
1202                 gtty(0, &live);
1203                 live.sg_flags |= CBREAK;
1204                 live.sg_flags |= CRMOD;
1205                 live.sg_flags |= NL1;
1206                 live.sg_flags &= ~ECHO;
1207                 if (cmd == 1)
1208                         live.sg_flags |= NOFLSH;
1209                 stty(0, &live);
1210         }
1211         if (cmd == 2) {
1212                 gtty(0, &saved_settings);
1213         }
1214         if (cmd == 3) {
1215                 stty(0, &saved_settings);
1216         }
1217 }
1218 #endif
1219
1220
1221 /*
1222  * display_help()  -  help file viewer
1223  */
1224 void display_help(CtdlIPC *ipc, char *name)
1225 {
1226         formout(ipc, name);
1227 }
1228
1229
1230 /*
1231  * fmout() - Citadel text formatter and paginator
1232  */
1233 int fmout(
1234         int width,      /* screen width to use */
1235         FILE *fpin,     /* file to read from, or NULL to format given text */
1236         char *text,     /* text to be formatted (when fpin is NULL */
1237         FILE *fpout,    /* file to write to, or NULL to write to screen */
1238         int subst)      /* nonzero if we should use hypertext mode */
1239 {
1240         char *buffer = NULL;    /* The current message */
1241         char *word = NULL;      /* What we are about to actually print */
1242         char *e;                /* Pointer to position in text */
1243         char old = 0;           /* The previous character */
1244         int column = 0;         /* Current column */
1245         size_t i;               /* Generic counter */
1246
1247         /* Space for a single word, which can be at most screenwidth */
1248         word = (char *)calloc(1, width);
1249         if (!word) {
1250                 scr_printf("Can't alloc memory to print message: %s!\n",
1251                                 strerror(errno));
1252                 logoff(NULL, 3);
1253         }
1254
1255         /* Read the entire message body into memory */
1256         if (fpin) {
1257                 buffer = load_message_from_file(fpin);
1258                 if (!buffer) {
1259                         scr_printf("Can't print message: %s!\n",
1260                                         strerror(errno));
1261                         logoff(NULL, 3);
1262                 }
1263         } else {
1264                 buffer = text;
1265         }
1266         e = buffer;
1267
1268         /* Run the message body */
1269         while (*e) {
1270                 /* Catch characters that shouldn't be there at all */
1271                 if (*e == '\r') {
1272                         e++;
1273                         continue;
1274                 }
1275                 /* First, are we looking at a newline? */
1276                 if (*e == '\n') {
1277                         e++;
1278                         if (*e == ' ') {        /* Paragraph */
1279                                 if (fpout) {
1280                                         fprintf(fpout, "\n");
1281                                 } else {
1282                                         scr_printf("\n");
1283                                 }
1284                                 column = 0;
1285                         } else if (old != ' ') {/* Don't print two spaces */
1286                                 if (fpout) {
1287                                         fprintf(fpout, " ");
1288                                 } else {
1289                                         scr_printf(" ");
1290                                 }
1291                                 column++;
1292                         }
1293                         old = '\n';
1294                         continue;
1295                 }
1296
1297                 /* Are we looking at a nonprintable?
1298                  * (This section is now commented out because we could be displaying
1299                  * a character set like UTF-8 or ISO-8859-1.)
1300                 if ( (*e < 32) || (*e > 126) ) {
1301                         e++;
1302                         continue;
1303                 } */
1304
1305                 /* Or are we looking at a space? */
1306                 if (*e == ' ') {
1307                         e++;
1308                         if (column >= width - 1) {
1309                                 /* Are we in the rightmost column? */
1310                                 if (fpout) {
1311                                         fprintf(fpout, "\n");
1312                                 } else {
1313                                         scr_printf("\n");
1314                                 }
1315                                 column = 0;
1316                         } else if (!(column == 0 && old == ' ')) {
1317                                 /* Eat only the first space on a line */
1318                                 if (fpout) {
1319                                         fprintf(fpout, " ");
1320                                 } else {
1321                                         scr_printf(" ");
1322                                 }
1323                                 column++;
1324                         }
1325                         /* ONLY eat the FIRST space on a line */
1326                         old = ' ';
1327                         continue;
1328                 }
1329                 old = *e;
1330
1331                 /* Read a word, slightly messy */
1332                 i = 0;
1333                 while (e[i]) {
1334                         if (!isprint(e[i]) && !isspace(e[i]))
1335                                 e[i] = ' ';
1336                         if (isspace(e[i]))
1337                                 break;
1338                         i++;
1339                 }
1340
1341                 /* We should never see these, but... slightly messy */
1342                 if (e[i] == '\t' || e[i] == '\f' || e[i] == '\v')
1343                         e[i] = ' ';
1344
1345                 /* Break up really long words */
1346                 /* TODO: auto-hyphenation someday? */
1347                 if (i >= width)
1348                         i = width - 1;
1349                 strncpy(word, e, i);
1350                 word[i] = 0;
1351
1352                 /* Decide where to print the word */
1353                 if (column + i >= width) {
1354                         /* Wrap to the next line */
1355                         if (fpout) {
1356                                 fprintf(fpout, "\n");
1357                         } else {
1358                                 scr_printf("\n");
1359                         }
1360                         column = 0;
1361                 }
1362
1363                 /* Print the word */
1364                 if (fpout) {
1365                         fprintf(fpout, "%s", word);
1366                 } else {
1367                         scr_printf("%s", word);
1368                 }
1369                 column += i;
1370                 e += i;         /* Start over with the whitepsace! */
1371         }
1372
1373         free(word);
1374         if (fpin)               /* We allocated this, remember? */
1375                 free(buffer);
1376
1377         /* Is this necessary?  It makes the output kind of spacey. */
1378         if (fpout) {
1379                 fprintf(fpout, "\n");
1380         } else {
1381                 scr_printf("\n");
1382         }
1383
1384         return sigcaught;
1385 }
1386
1387
1388 /*
1389  * support ANSI color if defined
1390  */
1391 void color(int colornum)
1392 {
1393         static int hold_color;
1394         static int current_color;
1395
1396         if (colornum == COLOR_PUSH) {
1397                 hold_color = current_color;
1398                 return;
1399         }
1400
1401         if (colornum == COLOR_POP) {
1402                 color(hold_color);
1403                 return;
1404         }
1405
1406         current_color = colornum;
1407         if (enable_color) {
1408                 /* When switching to dim white, actually output an 'original
1409                  * pair' sequence -- this looks better on black-on-white
1410                  * terminals. - Changed to ORIGINAL_PAIR as this actually
1411                  * wound up looking horrible on black-on-white terminals, not
1412                  * to mention transparent terminals.
1413                  */
1414                 if (colornum == ORIGINAL_PAIR)
1415                         printf("\033[0;39;49m");
1416                 else
1417                         printf("\033[%d;3%d;4%dm",
1418                                         (colornum & 8) ? 1 : 0,
1419                                         (colornum & 7),
1420                                         rc_color_use_bg);
1421
1422         }
1423 }
1424
1425 void cls(int colornum)
1426 {
1427         if (enable_color) {
1428                 printf("\033[4%dm\033[2J\033[H\033[0m",
1429                                 colornum ? colornum : rc_color_use_bg);
1430         }
1431 }
1432
1433
1434 /*
1435  * Detect whether ANSI color is available (answerback)
1436  */
1437 void send_ansi_detect(void)
1438 {
1439         if (rc_ansi_color == 2) {
1440                 printf("\033[c");
1441                 scr_flush();
1442                 time(&AnsiDetect);
1443         }
1444 }
1445
1446 void look_for_ansi(void)
1447 {
1448         fd_set rfds;
1449         struct timeval tv;
1450         char abuf[512];
1451         time_t now;
1452         int a, rv;
1453
1454         if (rc_ansi_color == 0) {
1455                 enable_color = 0;
1456         } else if (rc_ansi_color == 1) {
1457                 enable_color = 1;
1458         } else if (rc_ansi_color == 2) {
1459
1460                 /* otherwise, do the auto-detect */
1461
1462                 strcpy(abuf, "");
1463
1464                 time(&now);
1465                 if ((now - AnsiDetect) < 2)
1466                         sleep(1);
1467
1468                 do {
1469                         FD_ZERO(&rfds);
1470                         FD_SET(0, &rfds);
1471                         tv.tv_sec = 0;
1472                         tv.tv_usec = 1;
1473
1474                         select(1, &rfds, NULL, NULL, &tv);
1475                         if (FD_ISSET(0, &rfds)) {
1476                                 abuf[strlen(abuf) + 1] = 0;
1477                                 rv = read(0, &abuf[strlen(abuf)], 1);
1478                                 if (rv < 0) {
1479                                         scr_printf("failed to read after select: %s",
1480                                                    strerror(errno));
1481                                         break;
1482                                 }
1483                         }
1484                 } while (FD_ISSET(0, &rfds));
1485
1486                 for (a = 0; !IsEmptyStr(&abuf[a]); ++a) {
1487                         if ((abuf[a] == 27) && (abuf[a + 1] == '[')
1488                             && (abuf[a + 2] == '?')) {
1489                                 enable_color = 1;
1490                         }
1491                 }
1492         }
1493 }
1494
1495
1496 /*
1497  * Display key options (highlight hotkeys inside angle brackets)
1498  */
1499 void keyopt(char *buf) {
1500         int i;
1501
1502         color(DIM_WHITE);
1503         for (i=0; !IsEmptyStr(&buf[i]); ++i) {
1504                 if (buf[i]=='<') {
1505                         scr_printf("%c", buf[i]);
1506                         color(BRIGHT_MAGENTA);
1507                 } else {
1508                         if (buf[i]=='>'&& buf[i+1] != '>') {
1509                                 color(DIM_WHITE);
1510                         }
1511                         scr_printf("%c", buf[i]);
1512                 }
1513         }
1514         color(DIM_WHITE);
1515 }
1516
1517
1518
1519 /*
1520  * Present a key-menu line choice type of thing
1521  */
1522 char keymenu(char *menuprompt, char *menustring) {
1523         int i, c, a;
1524         int choices;
1525         int do_prompt = 0;
1526         char buf[1024];
1527         int ch;
1528         int display_prompt = 1;
1529
1530         choices = num_tokens(menustring, '|');
1531
1532         if (menuprompt != NULL) do_prompt = 1;
1533         if ((menuprompt != NULL) && (IsEmptyStr(menuprompt))) do_prompt = 0;
1534
1535         while (1) {
1536                 if (display_prompt) {
1537                         if (do_prompt) {
1538                                 scr_printf("%s ", menuprompt);
1539                         }
1540                         else {
1541                                 for (i=0; i<choices; ++i) {
1542                                         extract_token(buf, menustring, i, '|', sizeof buf);
1543                                         keyopt(buf);
1544                                         scr_printf(" ");
1545                                 }
1546                         }
1547                         scr_printf("-> ");
1548                         display_prompt = 0;
1549                 }
1550                 ch = lkey();
1551
1552                 if ( (do_prompt) && (ch=='?') ) {
1553                         scr_printf("\rOne of...                               ");
1554                         scr_printf("                                      \n");
1555                         for (i=0; i<choices; ++i) {
1556                                 extract_token(buf, menustring, i, '|', sizeof buf);
1557                                 scr_printf("   ");
1558                                 keyopt(buf);
1559                                 scr_printf("\n");
1560                         }
1561                         scr_printf("\n");
1562                         display_prompt = 1;
1563                 }
1564
1565                 for (i=0; i<choices; ++i) {
1566                         extract_token(buf, menustring, i, '|', sizeof buf);
1567                         for (c=1; !IsEmptyStr(&buf[c]); ++c) {
1568                                 if ( (ch == tolower(buf[c]))
1569                                    && (buf[c-1]=='<')
1570                                    && (buf[c+1]=='>') ) {
1571                                         for (a=0; !IsEmptyStr(&buf[a]); ++a) {
1572                                                 if ( (a!=(c-1)) && (a!=(c+1))) {
1573                                                         scr_putc(buf[a]);
1574                                                 }
1575                                         }
1576                                         scr_printf("\n");
1577                                         return ch;
1578                                 }
1579                         }
1580                 }
1581         }
1582 }