citadel/textclient/commands.c

   1 /*
   2  * This file contains functions which implement parts of the
   3  * text-mode user interface.
   4  *
   5  * Copyright (c) 1987-2009 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 int lines_printed = 0;          /* line count for paginator */
 104 extern int screenwidth, screenheight;
 105 extern int termn8;
 106 extern CtdlIPC *ipc_for_signal_handlers;        /* KLUDGE cover your eyes */
 107
 108 struct citcmd *cmdlist = NULL;
 109
 110
 111 /* these variables are local to this module */
 112 char keepalives_enabled = KA_YES;       /* send NOOPs to server when idle */
 113 int ok_to_interrupt = 0;                /* print instant msgs asynchronously */
 114 time_t AnsiDetect;                      /* when did we send the detect code? */
 115 int enable_color = 0;                   /* nonzero for ANSI color */
 116
 117
 118
 119
 120 /*
 121  * If an interesting key has been pressed, return its value, otherwise 0
 122  */
 123 char was_a_key_pressed(void) {
 124         fd_set rfds;
 125         struct timeval tv;
 126         int the_character;
 127         int retval;
 128
 129         FD_ZERO(&rfds);
 130         FD_SET(0, &rfds);
 131         tv.tv_sec = 0;
 132         tv.tv_usec = 0;
 133         retval = select(1, &rfds, NULL, NULL, &tv);
 134
 135         /* Careful!  Disable keepalives during keyboard polling; we're probably
 136          * in the middle of a data transfer from the server, in which case
 137          * sending a NOOP would throw the client protocol out of sync.
 138          */
 139         if (FD_ISSET(0, &rfds)) {
 140                 set_keepalives(KA_NO);
 141                 the_character = inkey();
 142                 set_keepalives(KA_YES);
 143         }
 144         else {
 145                 the_character = 0;
 146         }
 147         return(the_character);
 148 }
 149
 150
 151
 152
 153
 154 /*
 155  * Check to see if we need to pause at the end of a screen.
 156  * If we do, we have to switch to half keepalives during the pause because
 157  * we are probably in the middle of a server operation and the NOOP command
 158  * would confuse everything.
 159  */
 160 int checkpagin(int lp, unsigned int pagin, unsigned int height)
 161 {
 162         int thekey;
 163
 164         if (sigcaught) return(lp);
 165         thekey = was_a_key_pressed();
 166         if (thekey == 'q' || thekey == 'Q' || thekey == 's' || thekey == 'S')
 167                 thekey = STOP_KEY;
 168         if (thekey == 'n' || thekey == 'N')
 169                 thekey = NEXT_KEY;
 170         if ( (thekey == NEXT_KEY) || (thekey == STOP_KEY)) sigcaught = thekey;
 171         if (sigcaught) return(lp);
 172
 173         if (!pagin) return(0);
 174         if (lp>=(height-1)) {
 175                 set_keepalives(KA_HALF);
 176                 hit_any_key(ipc_for_signal_handlers);   /* Cheating -IO */
 177                 set_keepalives(KA_YES);
 178                 return(0);
 179         }
 180         return(lp);
 181 }
 182
 183
 184
 185
 186 /*
 187  * pprintf()  ...   paginated version of printf()
 188  */
 189 void pprintf(const char *format, ...) {
 190         va_list arg_ptr;
 191         static char buf[4096];  /* static for performance, change if needed */
 192         int i;
 193
 194         /* If sigcaught is nonzero, a keypress has interrupted this and we
 195          * should just drain output.
 196          */
 197         if (sigcaught) return;
 198
 199         /* Otherwise, start spewing... */
 200         va_start(arg_ptr, format);
 201         vsnprintf(buf, sizeof(buf), format, arg_ptr);
 202         va_end(arg_ptr);
 203
 204         for (i=0; !IsEmptyStr(&buf[i]); ++i) {
 205                 scr_putc(buf[i]);
 206                 if (buf[i]==10) {
 207                         ++lines_printed;
 208                         lines_printed = checkpagin(lines_printed,
 209                                 (userflags & US_PAGINATOR),
 210                                 screenheight);
 211                 }
 212         }
 213 }
 214
 215
 216
 217 /*
 218  * print_instant()  -  print instant messages if there are any
 219  */
 220 void print_instant(void)
 221 {
 222         char buf[1024];
 223         FILE *outpipe;
 224         time_t timestamp;
 225         struct tm stamp;
 226         int flags = 0;
 227         char sender[64];
 228         char node[64];
 229         char *listing = NULL;
 230         int r;                  /* IPC result code */
 231
 232         if (instant_msgs == 0)
 233                 return;
 234
 235         if (rc_exp_beep) {
 236                 ctdl_beep();
 237         }
 238         if (IsEmptyStr(rc_exp_cmd)) {
 239                 color(BRIGHT_RED);
 240                 scr_printf("\r---");
 241         }
 242
 243         while (instant_msgs != 0) {
 244                 r = CtdlIPCGetInstantMessage(ipc_for_signal_handlers, &listing, buf);
 245                 if (r / 100 != 1)
 246                         return;
 247
 248                 instant_msgs = extract_int(buf, 0);
 249                 timestamp = extract_long(buf, 1);
 250                 flags = extract_int(buf, 2);
 251                 extract_token(sender, buf, 3, '|', sizeof sender);
 252                 extract_token(node, buf, 4, '|', sizeof node);
 253                 strcpy(last_paged, sender);
 254
 255                 localtime_r(&timestamp, &stamp);
 256
 257                 /* If the page is a Logoff Request, honor it. */
 258                 if (flags & 2) {
 259                         termn8 = 1;
 260                         return;
 261                 }
 262
 263                 if (!IsEmptyStr(rc_exp_cmd)) {
 264                         outpipe = popen(rc_exp_cmd, "w");
 265                         if (outpipe != NULL) {
 266                                 /* Header derived from flags */
 267                                 if (flags & 2)
 268                                         fprintf(outpipe,
 269                                                "Please log off now, as requested ");
 270                                 else if (flags & 1)
 271                                         fprintf(outpipe, "Broadcast message ");
 272                                 else if (flags & 4)
 273                                         fprintf(outpipe, "Chat request ");
 274                                 else
 275                                         fprintf(outpipe, "Message ");
 276                                 /* Timestamp.  Can this be improved? */
 277                                 if (stamp.tm_hour == 0 || stamp.tm_hour == 12)
 278                                         fprintf(outpipe, "at 12:%02d%cm",
 279                                                 stamp.tm_min,
 280                                                 stamp.tm_hour ? 'p' : 'a');
 281                                 else if (stamp.tm_hour > 12)            /* pm */
 282                                         fprintf(outpipe, "at %d:%02dpm",
 283                                                 stamp.tm_hour - 12,
 284                                                 stamp.tm_min);
 285                                 else                                    /* am */
 286                                         fprintf(outpipe, "at %d:%02dam",
 287                                                 stamp.tm_hour, stamp.tm_min);
 288                                 fprintf(outpipe, " from %s", sender);
 289                                 if (strncmp(ipc_for_signal_handlers->ServInfo.nodename, node, 32))
 290                                         fprintf(outpipe, " @%s", node);
 291                                 fprintf(outpipe, ":\n%s\n", listing);
 292                                 pclose(outpipe);
 293                                 if (instant_msgs == 0)
 294                                         return;
 295                                 continue;
 296                         }
 297                 }
 298                 /* fall back to built-in instant message display */
 299                 scr_printf("\n");
 300                 lines_printed++;
 301
 302                 /* Header derived from flags */
 303                 if (flags & 2)
 304                         scr_printf("Please log off now, as requested ");
 305                 else if (flags & 1)
 306                         scr_printf("Broadcast message ");
 307                 else if (flags & 4)
 308                         scr_printf("Chat request ");
 309                 else
 310                         scr_printf("Message ");
 311
 312                 /* Timestamp.  Can this be improved? */
 313                 if (stamp.tm_hour == 0 || stamp.tm_hour == 12)/* 12am/12pm */
 314                         scr_printf("at 12:%02d%cm", stamp.tm_min,
 315                                 stamp.tm_hour ? 'p' : 'a');
 316                 else if (stamp.tm_hour > 12)                    /* pm */
 317                         scr_printf("at %d:%02dpm",
 318                                 stamp.tm_hour - 12, stamp.tm_min);
 319                 else                                            /* am */
 320                         scr_printf("at %d:%02dam", stamp.tm_hour, stamp.tm_min);
 321
 322                 /* Sender */
 323                 scr_printf(" from %s", sender);
 324
 325                 /* Remote node, if any */
 326                 if (strncmp(ipc_for_signal_handlers->ServInfo.nodename, node, 32))
 327                         scr_printf(" @%s", node);
 328
 329                 scr_printf(":\n");
 330                 lines_printed++;
 331                 fmout(screenwidth, NULL, listing, NULL, 1, screenheight, -1, 0);
 332                 free(listing);
 333
 334                 lines_printed = 0;
 335         }
 336         scr_printf("\n---\n");
 337         color(BRIGHT_WHITE);
 338
 339
 340 }
 341
 342
 343 void set_keepalives(int s)
 344 {
 345         keepalives_enabled = (char) s;
 346 }
 347
 348 /*
 349  * This loop handles the "keepalive" messages sent to the server when idling.
 350  */
 351
 352 static time_t idlet = 0;
 353 static void really_do_keepalive(void) {
 354         int r;                          /* IPC response code */
 355
 356         time(&idlet);
 357
 358         /* This may sometimes get called before we are actually connected
 359          * to the server.  Don't do anything if we aren't connected. -IO
 360          */
 361         if (!ipc_for_signal_handlers)
 362                 return;
 363
 364         /* If full keepalives are enabled, send a NOOP to the server and
 365          * wait for a response.
 366          */
 367         if (keepalives_enabled == KA_YES) {
 368                 r = CtdlIPCNoop(ipc_for_signal_handlers);
 369                 if (instant_msgs > 0) {
 370                         if (ok_to_interrupt == 1) {
 371                                 scr_printf("\r%64s\r", "");
 372                                 print_instant();
 373                                 scr_printf("%s%c ", room_name,
 374                                        room_prompt(room_flags));
 375                                 scr_flush();
 376                         }
 377                 }
 378         }
 379
 380         /* If half keepalives are enabled, send a QNOP to the server (if the
 381          * server supports it) and then do nothing.
 382          */
 383         if ( (keepalives_enabled == KA_HALF)
 384            && (ipc_for_signal_handlers->ServInfo.supports_qnop > 0) ) {
 385                 CtdlIPC_chat_send(ipc_for_signal_handlers, "QNOP");
 386         }
 387 }
 388
 389 /* threaded nonblocking keepalive stuff starts here. I'm going for a simple
 390    encapsulated interface; in theory there should be no need to touch these
 391    globals outside of the async_ka_* functions. */
 392
 393 #ifdef THREADED_CLIENT
 394 static pthread_t ka_thr_handle;
 395 static int ka_thr_active = 0;
 396 static int async_ka_enabled = 0;
 397
 398 static void *ka_thread(void *arg)
 399 {
 400 #ifdef HAVE_BACKTRACE
 401         char threadName[256];
 402
 403         // Set up our name
 404         sprintf(threadName, "ka_Thread n");
 405
 406         // Register for tracing
 407         eCrash_RegisterThread(threadName, 0);
 408 #endif
 409         really_do_keepalive();
 410         pthread_detach(ka_thr_handle);
 411         ka_thr_active = 0;
 412
 413 #ifdef HAVE_BACKTRACE
 414         eCrash_UnregisterThread();
 415 #endif
 416         return NULL;
 417 }
 418
 419 /* start up a thread to handle a keepalive in the background */
 420 static void async_ka_exec(void)
 421 {
 422         if (!ka_thr_active) {
 423                 ka_thr_active = 1;
 424                 if (pthread_create(&ka_thr_handle, NULL, ka_thread, NULL)) {
 425                         perror("pthread_create");
 426                         exit(1);
 427                 }
 428         }
 429 }
 430 #endif /* THREADED_CLIENT */
 431
 432 /* I changed this from static to not because I need to call it from
 433    screen.c, either that or make something in screen.c not static.
 434    Fix it how you like. Why all the staticness? stu */
 435
 436 void do_keepalive(void)
 437 {
 438         time_t now;
 439
 440         time(&now);
 441         if ((now - idlet) < ((long) S_KEEPALIVE))
 442                 return;
 443
 444         /* Do a space-backspace to keep telnet sessions from idling out */
 445         scr_printf(" %c", 8);
 446         scr_flush();
 447
 448 #ifdef THREADED_CLIENT
 449         if (async_ka_enabled)
 450                 async_ka_exec();
 451         else
 452 #endif
 453                 really_do_keepalive();
 454 }
 455
 456
 457 /* Now the actual async-keepalve API that we expose to higher levels:
 458    async_ka_start() and async_ka_end(). These do nothing when we don't have
 459    threading enabled, so we avoid sprinkling ifdef's throughout the code. */
 460
 461 /* wait for a background keepalive to complete. this must be done before
 462    attempting any further server requests! */
 463 void async_ka_end(void)
 464 {
 465 #ifdef THREADED_CLIENT
 466         if (ka_thr_active)
 467                 pthread_join(ka_thr_handle, NULL);
 468
 469         async_ka_enabled--;
 470 #endif
 471 }
 472
 473 /* tell do_keepalive() that keepalives are asynchronous. */
 474 void async_ka_start(void)
 475 {
 476 #ifdef THREADED_CLIENT
 477         async_ka_enabled++;
 478 #endif
 479 }
 480
 481
 482 int inkey(void)
 483 {                               /* get a character from the keyboard, with   */
 484         int a;                  /* the watchdog timer in effect if necessary */
 485         fd_set rfds;
 486         struct timeval tv;
 487         time_t start_time;
 488
 489         scr_flush();
 490         lines_printed = 0;
 491         time(&start_time);
 492
 493         do {
 494                 /* This loop waits for keyboard input.  If the keepalive
 495                  * timer expires, it sends a keepalive to the server if
 496                  * necessary and then waits again.
 497                  */
 498                 do {
 499                         scr_set_windowsize(ipc_for_signal_handlers);
 500                         do_keepalive();
 501                         scr_set_windowsize(ipc_for_signal_handlers);
 502
 503                         FD_ZERO(&rfds);
 504                         FD_SET(0, &rfds);
 505                         tv.tv_sec = S_KEEPALIVE;
 506                         tv.tv_usec = 0;
 507
 508                         select(1, &rfds, NULL, NULL, &tv);
 509                 } while (!FD_ISSET(0, &rfds));
 510
 511                 /* At this point, there's input, so fetch it.
 512                  * (There's a hole in the bucket...)
 513                  */
 514                 a = scr_getc(SCR_BLOCK);
 515                 if (a == 127) {
 516                         a = 8;
 517                 }
 518                 if (a == 13) {
 519                         a = 10;
 520                 }
 521 /* not so fast there dude, we have to handle UTF-8 and ISO-8859-1...
 522                 if (a > 126) {
 523                         a = 0;
 524                 }
 525                 if (((a != 23) && (a != 4) && (a != 10) && (a != 8) && (a != NEXT_KEY) && (a != STOP_KEY))
 526                     && ((a < 32) || (a > 126))) {
 527                         a = 0;
 528                 }
 529  */
 530
 531 #ifndef DISABLE_CURSES
 532 #if defined(HAVE_CURSES_H) || defined(HAVE_NCURSES_H)
 533                 if (a == ERR) {
 534                         logoff(NULL, 3);
 535                 }
 536 #endif
 537 #endif
 538
 539         } while (a == 0);
 540         return (a);
 541 }
 542
 543
 544 int yesno(void)
 545 {                               /* Returns 1 for yes, 0 for no */
 546         int a;
 547         while (1) {
 548                 a = inkey();
 549                 a = tolower(a);
 550                 if (a == 'y') {
 551                         scr_printf("Yes\n");
 552                         return (1);
 553                 }
 554                 if (a == 'n') {
 555                         scr_printf("No\n");
 556                         return (0);
 557                 }
 558         }
 559 }
 560
 561 /* Returns 1 for yes, 0 for no, arg is default value */
 562 int yesno_d(int d)
 563 {
 564         int a;
 565         while (1) {
 566                 a = inkey();
 567                 a = tolower(a);
 568                 if (a == 10)
 569                         a = (d ? 'y' : 'n');
 570                 if (a == 'y') {
 571                         scr_printf("Yes\n");
 572                         return (1);
 573                 }
 574                 if (a == 'n') {
 575                         scr_printf("No\n");
 576                         return (0);
 577                 }
 578         }
 579 }
 580
 581
 582
 583
 584 /* Gets a line from the terminal */
 585 /* string == Pointer to string buffer */
 586 /* lim == Maximum length - if negative, no-show */
 587 void ctdl_getline(char *string, int lim)
 588 {
 589         int a, b;
 590         char flag = 0;
 591
 592         if (lim < 0) {
 593                 lim = (0 - lim);
 594                 flag = 1;
 595         }
 596         strcpy(string, "");
 597         gl_string = string;
 598         async_ka_start();
 599
 600 GLA:    a = inkey();
 601         /* a = (a & 127); ** commented out because it isn't just an ASCII world anymore */
 602         if ((a == 8 || a == 23) && (IsEmptyStr(string)))
 603                 goto GLA;
 604         if ((a != 10) && (a != 8) && (strlen(string) == lim))
 605                 goto GLA;
 606         if ((a == 8) && (string[0] != 0)) {
 607                 string[strlen(string) - 1] = 0;
 608                 scr_putc(8); scr_putc(32); scr_putc(8);
 609                 goto GLA;
 610         }
 611         if ((a == 23) && (string[0] != 0)) {
 612                 do {
 613                         string[strlen(string) - 1] = 0;
 614                         scr_putc(8); scr_putc(32); scr_putc(8);
 615                 } while (!IsEmptyStr(string) && string[strlen(string) - 1] != ' ');
 616                 goto GLA;
 617         }
 618         if ((a == 10)) {
 619                 scr_putc(10);
 620                 async_ka_end();
 621                 return;
 622         }
 623         if (a < 32)
 624                 a = '.';
 625         b = strlen(string);
 626         string[b] = a;
 627         string[b + 1] = 0;
 628         if (flag == 0)
 629                 scr_putc(a);
 630         if (flag == 1)
 631                 scr_putc('*');
 632         goto GLA;
 633 }
 634
 635
 636 /*
 637  * strprompt()  -  prompt for a string, print the existing value and
 638  *                 allow the user to press return to keep it...
 639  */
 640 void strprompt(char *prompt, char *str, int len)
 641 {
 642         int i;
 643         char buf[128];
 644
 645         print_instant();
 646         color(DIM_WHITE);
 647         scr_printf("%s ", prompt);
 648         color(DIM_MAGENTA);
 649         scr_printf("[");
 650         color(BRIGHT_MAGENTA);
 651
 652         if (len >= 0) {
 653                 scr_printf("%s", str);
 654         }
 655         else {
 656                 for (i=0; !IsEmptyStr(&str[i]); ++i) {
 657                         scr_printf("*");
 658                 }
 659         }
 660
 661         color(DIM_MAGENTA);
 662         scr_printf("]");
 663         color(DIM_WHITE);
 664         scr_printf(": ");
 665         color(BRIGHT_CYAN);
 666         ctdl_getline(buf, len);
 667         if (buf[0] != 0)
 668                 strcpy(str, buf);
 669         color(DIM_WHITE);
 670 }
 671
 672 /*
 673  * boolprompt()  -  prompt for a yes/no, print the existing value and
 674  *                  allow the user to press return to keep it...
 675  */
 676 int boolprompt(char *prompt, int prev_val)
 677 {
 678         int r;
 679
 680         color(DIM_WHITE);
 681         scr_printf("%s ", prompt);
 682         color(DIM_MAGENTA);
 683         scr_printf("[");
 684         color(BRIGHT_MAGENTA);
 685         scr_printf("%s", (prev_val ? "Yes" : "No"));
 686         color(DIM_MAGENTA);
 687         scr_printf("]: ");
 688         color(BRIGHT_CYAN);
 689         r = (yesno_d(prev_val));
 690         color(DIM_WHITE);
 691         return r;
 692 }
 693
 694 /*
 695  * intprompt()  -  like strprompt(), except for an integer
 696  *                 (note that it RETURNS the new value!)
 697  */
 698 int intprompt(char *prompt, int ival, int imin, int imax)
 699 {
 700         char buf[16];
 701         int i;
 702         int p;
 703
 704         do {
 705                 i = ival;
 706                 snprintf(buf, sizeof buf, "%d", i);
 707                 strprompt(prompt, buf, 15);
 708                 i = atoi(buf);
 709                 for (p=0; !IsEmptyStr(&buf[p]); ++p) {
 710                         if ( (!isdigit(buf[p]))
 711                            && ( (buf[p]!='-') || (p!=0) )  )
 712                                 i = imin - 1;
 713                 }
 714                 if (i < imin)
 715                         scr_printf("*** Must be no less than %d.\n", imin);
 716                 if (i > imax)
 717                         scr_printf("*** Must be no more than %d.\n", imax);
 718         } while ((i < imin) || (i > imax));
 719         return (i);
 720 }
 721
 722 /*
 723  * newprompt()  -  prompt for a string with no existing value
 724  *                 (clears out string buffer first)
 725  */
 726 void newprompt(char *prompt, char *str, int len)
 727 {
 728         color(BRIGHT_MAGENTA);
 729         scr_printf("%s", prompt);
 730         color(DIM_MAGENTA);
 731         ctdl_getline(str, len);
 732         color(DIM_WHITE);
 733 }
 734
 735
 736 int lkey(void)
 737 {                               /* returns a lower case value */
 738         int a;
 739         a = inkey();
 740         if (isupper(a))
 741                 a = tolower(a);
 742         return (a);
 743 }
 744
 745 /*
 746  * parse the citadel.rc file
 747  */
 748 void load_command_set(void)
 749 {
 750         FILE *ccfile;
 751         char buf[1024];
 752         char editor_key[100];
 753         struct citcmd *cptr;
 754         struct citcmd *lastcmd = NULL;
 755         int a, d;
 756         int b = 0;
 757         int i;
 758
 759
 760         /* first, set up some defaults for non-required variables */
 761
 762         for (i = 0; i < MAX_EDITORS; i++)
 763                 strcpy(editor_paths[i], "");
 764         strcpy(printcmd, "");
 765         strcpy(imagecmd, "");
 766         strcpy(rc_username, "");
 767         strcpy(rc_password, "");
 768         rc_floor_mode = 0;
 769         rc_exp_beep = 1;
 770         rc_allow_attachments = 0;
 771         rc_remember_passwords = 0;
 772         strcpy(rc_exp_cmd, "");
 773         rc_display_message_numbers = 0;
 774         rc_force_mail_prompts = 0;
 775         rc_ansi_color = 0;
 776         rc_color_use_bg = 0;
 777         strcpy(rc_url_cmd, "");
 778         strcpy(rc_open_cmd, "");
 779         strcpy(rc_gotmail_cmd, "");
 780 #ifdef HAVE_OPENSSL
 781         rc_encrypt = RC_DEFAULT;
 782 #endif
 783 #if defined(HAVE_CURSES_H) && !defined(DISABLE_CURSES)
 784         rc_screen = RC_DEFAULT;
 785 #endif
 786         rc_alt_semantics = 0;
 787
 788         /* now try to open the citadel.rc file */
 789
 790         ccfile = NULL;
 791         if (getenv("HOME") != NULL) {
 792                 snprintf(buf, sizeof buf, "%s/.citadelrc", getenv("HOME"));
 793                 ccfile = fopen(buf, "r");
 794         }
 795         if (ccfile == NULL) {
 796                 ccfile = fopen(file_citadel_rc, "r");
 797         }
 798         if (ccfile == NULL) {
 799                 ccfile = fopen("/etc/citadel.rc", "r");
 800         }
 801         if (ccfile == NULL) {
 802                 ccfile = fopen("./citadel.rc", "r");
 803         }
 804         if (ccfile == NULL) {
 805                 perror("commands: cannot open citadel.rc");
 806                 logoff(NULL, 3);
 807         }
 808         while (fgets(buf, sizeof buf, ccfile) != NULL) {
 809                 while ((!IsEmptyStr(buf)) ? (isspace(buf[strlen(buf) - 1])) : 0)
 810                         buf[strlen(buf) - 1] = 0;
 811
 812                 if (!strncasecmp(buf, "encrypt=", 8)) {
 813                         if (!strcasecmp(&buf[8], "yes")) {
 814 #ifdef HAVE_OPENSSL
 815                                 rc_encrypt = RC_YES;
 816 #else
 817                                 fprintf(stderr, "citadel.rc requires encryption support but citadel is not compiled with OpenSSL");
 818                                 logoff(NULL, 3);
 819 #endif
 820                         }
 821 #ifdef HAVE_OPENSSL
 822                         else if (!strcasecmp(&buf[8], "no")) {
 823                                 rc_encrypt = RC_NO;
 824                         }
 825                         else if (!strcasecmp(&buf[8], "default")) {
 826                                 rc_encrypt = RC_DEFAULT;
 827                         }
 828 #endif
 829                 }
 830
 831 #if defined(HAVE_CURSES_H) && !defined(DISABLE_CURSES)
 832                 if (!strncasecmp(buf, "fullscreen=", 11)) {
 833                         if (!strcasecmp(&buf[11], "yes"))
 834                                 rc_screen = RC_YES;
 835                         else if (!strcasecmp(&buf[11], "no"))
 836                                 rc_screen = RC_NO;
 837                 }
 838 #endif
 839
 840                 if (!strncasecmp(buf, "editor=", 7))
 841                         strcpy(editor_paths[0], &buf[7]);
 842
 843                 for (i = 0; i < MAX_EDITORS; i++)
 844                 {
 845                         sprintf(editor_key, "editor%d=", i);
 846                         if (!strncasecmp(buf, editor_key, strlen(editor_key)))
 847                                 strcpy(editor_paths[i], &buf[strlen(editor_key)]);
 848                 }
 849
 850                 if (!strncasecmp(buf, "printcmd=", 9))
 851                         strcpy(printcmd, &buf[9]);
 852
 853                 if (!strncasecmp(buf, "imagecmd=", 9))
 854                         strcpy(imagecmd, &buf[9]);
 855
 856                 if (!strncasecmp(buf, "expcmd=", 7))
 857                         strcpy(rc_exp_cmd, &buf[7]);
 858
 859                 if (!strncasecmp(buf, "local_screen_dimensions=", 24))
 860                         have_xterm = (char) atoi(&buf[24]);
 861
 862                 if (!strncasecmp(buf, "use_floors=", 11)) {
 863                         if (!strcasecmp(&buf[11], "yes"))
 864                                 rc_floor_mode = RC_YES;
 865                         if (!strcasecmp(&buf[11], "no"))
 866                                 rc_floor_mode = RC_NO;
 867                         if (!strcasecmp(&buf[11], "default"))
 868                                 rc_floor_mode = RC_DEFAULT;
 869                 }
 870                 if (!strncasecmp(buf, "beep=", 5)) {
 871                         rc_exp_beep = atoi(&buf[5]);
 872                 }
 873                 if (!strncasecmp(buf, "allow_attachments=", 18)) {
 874                         rc_allow_attachments = atoi(&buf[18]);
 875                 }
 876                 if (!strncasecmp(buf, "idle_threshold=", 15)) {
 877                         rc_idle_threshold = atol(&buf[15]);
 878                 }
 879                 if (!strncasecmp(buf, "remember_passwords=", 19)) {
 880                         rc_remember_passwords = atoi(&buf[19]);
 881                 }
 882                 if (!strncasecmp(buf, "display_message_numbers=", 24)) {
 883                         rc_display_message_numbers = atoi(&buf[24]);
 884                 }
 885                 if (!strncasecmp(buf, "force_mail_prompts=", 19)) {
 886                         rc_force_mail_prompts = atoi(&buf[19]);
 887                 }
 888                 if (!strncasecmp(buf, "ansi_color=", 11)) {
 889                         if (!strncasecmp(&buf[11], "on", 2))
 890                                 rc_ansi_color = 1;
 891                         if (!strncasecmp(&buf[11], "auto", 4))
 892                                 rc_ansi_color = 2;      /* autodetect */
 893                         if (!strncasecmp(&buf[11], "user", 4))
 894                                 rc_ansi_color = 3;      /* user config */
 895                 }
 896                 if (!strncasecmp(buf, "use_background=", 15)) {
 897                         if (!strncasecmp(&buf[15], "on", 2))
 898                                 rc_color_use_bg = 9;
 899                 }
 900                 if (!strncasecmp(buf, "prompt_control=", 15)) {
 901                         if (!strncasecmp(&buf[15], "on", 2))
 902                                 rc_prompt_control = 1;
 903                         if (!strncasecmp(&buf[15], "user", 4))
 904                                 rc_prompt_control = 3;  /* user config */
 905                 }
 906                 if (!strncasecmp(buf, "username=", 9))
 907                         strcpy(rc_username, &buf[9]);
 908
 909                 if (!strncasecmp(buf, "password=", 9))
 910                         strcpy(rc_password, &buf[9]);
 911
 912                 if (!strncasecmp(buf, "urlcmd=", 7))
 913                         strcpy(rc_url_cmd, &buf[7]);
 914
 915                 if (!strncasecmp(buf, "opencmd=", 7))
 916                         strcpy(rc_open_cmd, &buf[8]);
 917
 918                 if (!strncasecmp(buf, "gotmailcmd=", 11))
 919                         strcpy(rc_gotmail_cmd, &buf[11]);
 920
 921                 if (!strncasecmp(buf, "alternate_semantics=", 20)) {
 922                         if (!strncasecmp(&buf[20], "yes", 3)) {
 923                                 rc_alt_semantics = 1;
 924                         }
 925                         else {
 926                                 rc_alt_semantics = 0;
 927                         }
 928                 }
 929
 930                 if (!strncasecmp(buf, "cmd=", 4)) {
 931                         strcpy(buf, &buf[4]);
 932
 933                         cptr = (struct citcmd *) malloc(sizeof(struct citcmd));
 934
 935                         cptr->c_cmdnum = atoi(buf);
 936                         for (d = strlen(buf); d >= 0; --d)
 937                                 if (buf[d] == ',')
 938                                         b = d;
 939                         strcpy(buf, &buf[b + 1]);
 940
 941                         cptr->c_axlevel = atoi(buf);
 942                         for (d = strlen(buf); d >= 0; --d)
 943                                 if (buf[d] == ',')
 944                                         b = d;
 945                         strcpy(buf, &buf[b + 1]);
 946
 947                         for (a = 0; a < 5; ++a)
 948                                 cptr->c_keys[a][0] = 0;
 949
 950                         a = 0;
 951                         b = 0;
 952                         buf[strlen(buf) + 1] = 0;
 953                         while (!IsEmptyStr(buf)) {
 954                                 b = strlen(buf);
 955                                 for (d = strlen(buf); d >= 0; --d)
 956                                         if (buf[d] == ',')
 957                                                 b = d;
 958                                 strncpy(cptr->c_keys[a], buf, b);
 959                                 cptr->c_keys[a][b] = 0;
 960                                 if (buf[b] == ',')
 961                                         strcpy(buf, &buf[b + 1]);
 962                                 else
 963                                         strcpy(buf, "");
 964                                 ++a;
 965                         }
 966
 967                         cptr->next = NULL;
 968                         if (cmdlist == NULL)
 969                                 cmdlist = cptr;
 970                         else
 971                                 lastcmd->next = cptr;
 972                         lastcmd = cptr;
 973                 }
 974         }
 975         fclose(ccfile);
 976 }
 977
 978
 979
 980 /*
 981  * return the key associated with a command
 982  */
 983 char keycmd(char *cmdstr)
 984 {
 985         int a;
 986
 987         for (a = 0; !IsEmptyStr(&cmdstr[a]); ++a)
 988                 if (cmdstr[a] == '&')
 989                         return (tolower(cmdstr[a + 1]));
 990         return (0);
 991 }
 992
 993
 994 /*
 995  * Output the string from a key command without the ampersand
 996  * "mode" should be set to 0 for normal or 1 for <C>ommand key highlighting
 997  */
 998 char *cmd_expand(char *strbuf, int mode)
 999 {
1000         int a;
1001         static char exp[64];
1002         char buf[1024];
1003
1004         strcpy(exp, strbuf);
1005
1006         for (a = 0; exp[a]; ++a) {
1007                 if (strbuf[a] == '&') {
1008
1009                         /* dont echo these non mnemonic command keys */
1010                         int noecho = strbuf[a+1] == '<' || strbuf[a+1] == '>' || strbuf[a+1] == '+' || strbuf[a+1] == '-';
1011
1012                         if (mode == 0) {
1013                                 strcpy(&exp[a], &exp[a + 1 + noecho]);
1014                         }
1015                         if (mode == 1) {
1016                                 exp[a] = '<';
1017                                 strcpy(buf, &exp[a + 2]);
1018                                 exp[a + 2] = '>';
1019                                 exp[a + 3] = 0;
1020                                 strcat(exp, buf);
1021                         }
1022                 }
1023                 if (!strncmp(&exp[a], "^r", 2)) {
1024                         strcpy(buf, exp);
1025                         strcpy(&exp[a], room_name);
1026                         strcat(exp, &buf[a + 2]);
1027                 }
1028                 if (!strncmp(&exp[a], "^c", 2)) {
1029                         exp[a] = ',';
1030                         strcpy(&exp[a + 1], &exp[a + 2]);
1031                 }
1032         }
1033
1034         return (exp);
1035 }
1036
1037
1038
1039 /*
1040  * Comparison function to determine if entered commands match a
1041  * command loaded from the config file.
1042  */
1043 int cmdmatch(char *cmdbuf, struct citcmd *cptr, int ncomp)
1044 {
1045         int a;
1046         int cmdax;
1047
1048         cmdax = 0;
1049         if (is_room_aide)
1050                 cmdax = 1;
1051         if (axlevel >= 6)
1052                 cmdax = 2;
1053
1054         for (a = 0; a < ncomp; ++a) {
1055                 if ((tolower(cmdbuf[a]) != keycmd(cptr->c_keys[a]))
1056                     || (cptr->c_axlevel > cmdax))
1057                         return (0);
1058         }
1059         return (1);
1060 }
1061
1062
1063 /*
1064  * This function returns 1 if a given command requires a string input
1065  */
1066 int requires_string(struct citcmd *cptr, int ncomp)
1067 {
1068         int a;
1069         char buf[64];
1070
1071         strcpy(buf, cptr->c_keys[ncomp - 1]);
1072         for (a = 0; !IsEmptyStr(&buf[a]); ++a) {
1073                 if (buf[a] == ':')
1074                         return (1);
1075         }
1076         return (0);
1077 }
1078
1079
1080 /*
1081  * Input a command at the main prompt.
1082  * This function returns an integer command number.  If the command prompts
1083  * for a string then it is placed in the supplied buffer.
1084  */
1085 int getcmd(CtdlIPC *ipc, char *argbuf)
1086 {
1087         char cmdbuf[5];
1088         int cmdspaces[5];
1089         int cmdpos;
1090         int ch;
1091         int a;
1092         int got;
1093         int this_lazy_cmd;
1094         struct citcmd *cptr;
1095
1096         /*
1097          * Starting a new command now, so set sigcaught to 0.  This variable
1098          * is set to nonzero (usually NEXT_KEY or STOP_KEY) if a command has
1099          * been interrupted by a keypress.
1100          */
1101         sigcaught = 0;
1102
1103         /* Switch color support on or off if we're in user mode */
1104         if (rc_ansi_color == 3) {
1105                 if (userflags & US_COLOR)
1106                         enable_color = 1;
1107                 else
1108                         enable_color = 0;
1109         }
1110         /* if we're running in idiot mode, display a cute little menu */
1111         IFNEXPERT formout(ipc, "mainmenu");
1112
1113         print_instant();
1114         strcpy(argbuf, "");
1115         cmdpos = 0;
1116         for (a = 0; a < 5; ++a)
1117                 cmdbuf[a] = 0;
1118         /* now the room prompt... */
1119         ok_to_interrupt = 1;
1120         color(BRIGHT_WHITE);
1121         scr_printf("\n%s", room_name);
1122         color(DIM_WHITE);
1123         scr_printf("%c ", room_prompt(room_flags));
1124         scr_flush();
1125
1126         while (1) {
1127                 ch = inkey();
1128                 ok_to_interrupt = 0;
1129
1130                 /* Handle the backspace key, but only if there's something
1131                  * to backspace over...
1132                  */
1133                 if ((ch == 8) && (cmdpos > 0)) {
1134                         back(cmdspaces[cmdpos - 1] + 1);
1135                         cmdbuf[cmdpos] = 0;
1136                         --cmdpos;
1137                 }
1138                 /* Spacebar invokes "lazy traversal" commands */
1139                 if ((ch == 32) && (cmdpos == 0)) {
1140                         this_lazy_cmd = next_lazy_cmd;
1141                         if (this_lazy_cmd == 13)
1142                                 next_lazy_cmd = 5;
1143                         if (this_lazy_cmd == 5)
1144                                 next_lazy_cmd = 13;
1145                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1146                                 if (cptr->c_cmdnum == this_lazy_cmd) {
1147                                         for (a = 0; a < 5; ++a)
1148                                                 if (cptr->c_keys[a][0] != 0)
1149                                                         scr_printf("%s ", cmd_expand(
1150                                                                                         cptr->c_keys[a], 0));
1151                                         scr_printf("\n");
1152                                         return (this_lazy_cmd);
1153                                 }
1154                         }
1155                         scr_printf("\n");
1156                         return (this_lazy_cmd);
1157                 }
1158                 /* Otherwise, process the command */
1159                 cmdbuf[cmdpos] = tolower(ch);
1160
1161                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1162                         if (cmdmatch(cmdbuf, cptr, cmdpos + 1)) {
1163
1164                                 scr_printf("%s", cmd_expand(cptr->c_keys[cmdpos], 0));
1165                                 cmdspaces[cmdpos] = strlen(
1166                                     cmd_expand(cptr->c_keys[cmdpos], 0));
1167                                 if (cmdpos < 4)
1168                                         if ((cptr->c_keys[cmdpos + 1]) != 0)
1169                                                 scr_putc(' ');
1170                                 ++cmdpos;
1171                         }
1172                 }
1173
1174                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1175                         if (cmdmatch(cmdbuf, cptr, 5)) {
1176                                 /* We've found our command. */
1177                                 if (requires_string(cptr, cmdpos)) {
1178                                         ctdl_getline(argbuf, 64);
1179                                 } else {
1180                                         scr_printf("\n");
1181                                 }
1182
1183                                 /* If this command is one that changes rooms,
1184                                  * then the next lazy-command (space bar)
1185                                  * should be "read new" instead of "goto"
1186                                  */
1187                                 if ((cptr->c_cmdnum == 5)
1188                                     || (cptr->c_cmdnum == 6)
1189                                     || (cptr->c_cmdnum == 47)
1190                                     || (cptr->c_cmdnum == 52)
1191                                     || (cptr->c_cmdnum == 16)
1192                                     || (cptr->c_cmdnum == 20))
1193                                         next_lazy_cmd = 13;
1194
1195                                 /* If this command is "read new"
1196                                  * then the next lazy-command (space bar)
1197                                  * should be "goto"
1198                                  */
1199                                 if (cptr->c_cmdnum == 13)
1200                                         next_lazy_cmd = 5;
1201
1202                                 return (cptr->c_cmdnum);
1203
1204                         }
1205                 }
1206
1207                 if (ch == '?') {
1208                         pprintf("\rOne of ...                         \n");
1209                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1210                                 if (cmdmatch(cmdbuf, cptr, cmdpos)) {
1211                                         for (a = 0; a < 5; ++a) {
1212                                            keyopt(cmd_expand(cptr->c_keys[a], 1));
1213                                    pprintf(" ");
1214                                         }
1215                                         pprintf("\n");
1216                                 }
1217                         }
1218                 sigcaught = 0;
1219
1220                         pprintf("\n%s%c ", room_name, room_prompt(room_flags));
1221                         got = 0;
1222                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
1223                                 if ((got == 0) && (cmdmatch(cmdbuf, cptr, cmdpos))) {
1224                                         for (a = 0; a < cmdpos; ++a) {
1225                                                 pprintf("%s ",
1226                                                        cmd_expand(cptr->c_keys[a], 0));
1227                                         }
1228                                         got = 1;
1229                                 }
1230                         }
1231                 }
1232         }
1233
1234 }
1235
1236
1237
1238
1239
1240 /*
1241  * set tty modes.  commands are:
1242  *
1243  * 01- set to Citadel mode
1244  * 2 - save current settings for later restoral
1245  * 3 - restore saved settings
1246  */
1247 #ifdef HAVE_TERMIOS_H
1248 void stty_ctdl(int cmd)
1249 {                               /* SysV version of stty_ctdl() */
1250         struct termios live;
1251         static struct termios saved_settings;
1252         static int last_cmd = 0;
1253
1254         if (cmd == SB_LAST)
1255                 cmd = last_cmd;
1256         else
1257                 last_cmd = cmd;
1258
1259         if ((cmd == 0) || (cmd == 1)) {
1260                 tcgetattr(0, &live);
1261                 live.c_iflag = ISTRIP | IXON | IXANY;
1262                 live.c_oflag = OPOST | ONLCR;
1263                 live.c_lflag = ISIG | NOFLSH;
1264
1265                 live.c_cc[VINTR] = 0;
1266                 live.c_cc[VQUIT] = 0;
1267
1268 #ifdef hpux
1269                 live.c_cc[VMIN] = 0;
1270                 live.c_cc[VTIME] = 0;
1271 #endif
1272
1273                 /* do we even need this stuff anymore? */
1274                 /* live.c_line=0; */
1275                 live.c_cc[VERASE] = 8;
1276                 live.c_cc[VKILL] = 24;
1277                 live.c_cc[VEOF] = 1;
1278                 live.c_cc[VEOL] = 255;
1279                 live.c_cc[VEOL2] = 0;
1280                 live.c_cc[VSTART] = 0;
1281                 tcsetattr(0, TCSADRAIN, &live);
1282         }
1283         if (cmd == 2) {
1284                 tcgetattr(0, &saved_settings);
1285         }
1286         if (cmd == 3) {
1287                 tcsetattr(0, TCSADRAIN, &saved_settings);
1288         }
1289
1290 }
1291 #else
1292 void stty_ctdl(int cmd)
1293 {                               /* BSD version of stty_ctdl() */
1294         struct sgttyb live;
1295         static struct sgttyb saved_settings;
1296         static int last_cmd = 0;
1297
1298         if (cmd == SB_LAST)
1299                 cmd = last_cmd;
1300         else
1301                 last_cmd = cmd;
1302
1303         if ((cmd == 0) || (cmd == 1)) {
1304                 gtty(0, &live);
1305                 live.sg_flags |= CBREAK;
1306                 live.sg_flags |= CRMOD;
1307                 live.sg_flags |= NL1;
1308                 live.sg_flags &= ~ECHO;
1309                 if (cmd == 1)
1310                         live.sg_flags |= NOFLSH;
1311                 stty(0, &live);
1312         }
1313         if (cmd == 2) {
1314                 gtty(0, &saved_settings);
1315         }
1316         if (cmd == 3) {
1317                 stty(0, &saved_settings);
1318         }
1319 }
1320 #endif
1321
1322
1323 /*
1324  * display_help()  -  help file viewer
1325  */
1326 void display_help(CtdlIPC *ipc, char *name)
1327 {
1328         formout(ipc, name);
1329 }
1330
1331
1332 /*
1333  * fmout() - Citadel text formatter and paginator
1334  */
1335 int fmout(
1336         int width,      /* screen width to use */
1337         FILE *fpin,     /* file to read from, or NULL to format given text */
1338         char *text,     /* text to be formatted (when fpin is NULL */
1339         FILE *fpout,    /* file to write to, or NULL to write to screen */
1340         char pagin,     /* nonzero if we should use the paginator */
1341         int height,     /* screen height to use */
1342         int starting_lp,/* starting value for lines_printed, -1 for global */
1343         int subst)      /* nonzero if we should use hypertext mode */
1344 {
1345         char *buffer = NULL;    /* The current message */
1346         char *word = NULL;      /* What we are about to actually print */
1347         char *e;                /* Pointer to position in text */
1348         char old = 0;           /* The previous character */
1349         int column = 0;         /* Current column */
1350         size_t i;               /* Generic counter */
1351
1352         /* Space for a single word, which can be at most screenwidth */
1353         word = (char *)calloc(1, width);
1354         if (!word) {
1355                 err_printf("Can't alloc memory to print message: %s!\n",
1356                                 strerror(errno));
1357                 logoff(NULL, 3);
1358         }
1359
1360         /* Read the entire message body into memory */
1361         if (fpin) {
1362                 buffer = load_message_from_file(fpin);
1363                 if (!buffer) {
1364                         err_printf("Can't print message: %s!\n",
1365                                         strerror(errno));
1366                         logoff(NULL, 3);
1367                 }
1368         } else {
1369                 buffer = text;
1370         }
1371         e = buffer;
1372
1373         if (starting_lp >= 0)
1374                 lines_printed = starting_lp;
1375
1376         /* Run the message body */
1377         while (*e) {
1378                 /* Catch characters that shouldn't be there at all */
1379                 if (*e == '\r') {
1380                         e++;
1381                         continue;
1382                 }
1383                 /* First, are we looking at a newline? */
1384                 if (*e == '\n') {
1385                         e++;
1386                         if (*e == ' ') {        /* Paragraph */
1387                                 if (fpout) {
1388                                         fprintf(fpout, "\n");
1389                                 } else {
1390                                         scr_printf("\n");
1391                                         ++lines_printed;
1392                                         lines_printed = checkpagin(lines_printed, pagin, height);
1393                                 }
1394                                 column = 0;
1395                         } else if (old != ' ') {/* Don't print two spaces */
1396                                 if (fpout) {
1397                                         fprintf(fpout, " ");
1398                                 } else {
1399                                         scr_printf(" ");
1400                                 }
1401                                 column++;
1402                         }
1403                         old = '\n';
1404                         continue;
1405                 }
1406
1407                 /* Are we looking at a nonprintable?
1408                  * (This section is now commented out because we could be displaying
1409                  * a character set like UTF-8 or ISO-8859-1.)
1410                 if ( (*e < 32) || (*e > 126) ) {
1411                         e++;
1412                         continue;
1413                 } */
1414
1415                 /* Or are we looking at a space? */
1416                 if (*e == ' ') {
1417                         e++;
1418                         if (column >= width - 1) {
1419                                 /* Are we in the rightmost column? */
1420                                 if (fpout) {
1421                                         fprintf(fpout, "\n");
1422                                 } else {
1423                                         scr_printf("\n");
1424                                         ++lines_printed;
1425                                         lines_printed = checkpagin(lines_printed, pagin, height);
1426                                 }
1427                                 column = 0;
1428                         } else if (!(column == 0 && old == ' ')) {
1429                                 /* Eat only the first space on a line */
1430                                 if (fpout) {
1431                                         fprintf(fpout, " ");
1432                                 } else {
1433                                         scr_printf(" ");
1434                                 }
1435                                 column++;
1436                         }
1437                         /* ONLY eat the FIRST space on a line */
1438                         old = ' ';
1439                         continue;
1440                 }
1441                 old = *e;
1442
1443                 /* Read a word, slightly messy */
1444                 i = 0;
1445                 while (e[i]) {
1446                         if (!isprint(e[i]) && !isspace(e[i]))
1447                                 e[i] = ' ';
1448                         if (isspace(e[i]))
1449                                 break;
1450                         i++;
1451                 }
1452
1453                 /* We should never see these, but... slightly messy */
1454                 if (e[i] == '\t' || e[i] == '\f' || e[i] == '\v')
1455                         e[i] = ' ';
1456
1457                 /* Break up really long words */
1458                 /* TODO: auto-hyphenation someday? */
1459                 if (i >= width)
1460                         i = width - 1;
1461                 strncpy(word, e, i);
1462                 word[i] = 0;
1463
1464                 /* Decide where to print the word */
1465                 if (column + i >= width) {
1466                         /* Wrap to the next line */
1467                         if (fpout) {
1468                                 fprintf(fpout, "\n");
1469                         } else {
1470                                 scr_printf("\n");
1471                                 ++lines_printed;
1472                                 lines_printed = checkpagin(lines_printed, pagin, height);
1473                         }
1474                         column = 0;
1475                 }
1476
1477                 /* Print the word */
1478                 if (fpout) {
1479                         fprintf(fpout, "%s", word);
1480                 } else {
1481                         scr_printf("%s", word);
1482                 }
1483                 column += i;
1484                 e += i;         /* Start over with the whitepsace! */
1485         }
1486
1487         free(word);
1488         if (fpin)               /* We allocated this, remember? */
1489                 free(buffer);
1490
1491         /* Is this necessary?  It makes the output kind of spacey. */
1492         if (fpout) {
1493                 fprintf(fpout, "\n");
1494         } else {
1495                 scr_printf("\n");
1496                 ++lines_printed;
1497                 lines_printed = checkpagin(lines_printed, pagin, height);
1498         }
1499
1500         return sigcaught;
1501 }
1502
1503
1504 /*
1505  * support ANSI color if defined
1506  */
1507 void color(int colornum)
1508 {
1509         static int hold_color;
1510         static int current_color;
1511
1512         if (colornum == COLOR_PUSH) {
1513                 hold_color = current_color;
1514                 return;
1515         }
1516
1517         if (colornum == COLOR_POP) {
1518                 color(hold_color);
1519                 return;
1520         }
1521
1522         current_color = colornum;
1523         if (enable_color) {
1524 #if defined(HAVE_CURSES_H) && !defined(DISABLE_CURSES)
1525                 if (scr_color(colornum))
1526                         return;
1527 #endif
1528                 /* When switching to dim white, actually output an 'original
1529                  * pair' sequence -- this looks better on black-on-white
1530                  * terminals. - Changed to ORIGINAL_PAIR as this actually
1531                  * wound up looking horrible on black-on-white terminals, not
1532                  * to mention transparent terminals.
1533                  */
1534                 if (colornum == ORIGINAL_PAIR)
1535                         printf("\033[0;39;49m");
1536                 else
1537                         printf("\033[%d;3%d;4%dm",
1538                                         (colornum & 8) ? 1 : 0,
1539                                         (colornum & 7),
1540                                         rc_color_use_bg);
1541
1542                 scr_flush();
1543         }
1544 }
1545
1546 void cls(int colornum)
1547 {
1548         if (enable_color) {
1549                 printf("\033[4%dm\033[2J\033[H\033[0m",
1550                                 colornum ? colornum : rc_color_use_bg);
1551                 scr_flush();
1552         }
1553 }
1554
1555
1556 /*
1557  * Detect whether ANSI color is available (answerback)
1558  */
1559 void send_ansi_detect(void)
1560 {
1561         if (rc_ansi_color == 2) {
1562                 printf("\033[c");
1563                 scr_flush();
1564                 time(&AnsiDetect);
1565         }
1566 }
1567
1568 void look_for_ansi(void)
1569 {
1570         fd_set rfds;
1571         struct timeval tv;
1572         char abuf[512];
1573         time_t now;
1574         int a, rv;
1575
1576         if (rc_ansi_color == 0) {
1577                 enable_color = 0;
1578         } else if (rc_ansi_color == 1) {
1579                 enable_color = 1;
1580         } else if (rc_ansi_color == 2) {
1581
1582                 /* otherwise, do the auto-detect */
1583
1584                 strcpy(abuf, "");
1585
1586                 time(&now);
1587                 if ((now - AnsiDetect) < 2)
1588                         sleep(1);
1589
1590                 do {
1591                         FD_ZERO(&rfds);
1592                         FD_SET(0, &rfds);
1593                         tv.tv_sec = 0;
1594                         tv.tv_usec = 1;
1595
1596                         select(1, &rfds, NULL, NULL, &tv);
1597                         if (FD_ISSET(0, &rfds)) {
1598                                 abuf[strlen(abuf) + 1] = 0;
1599                                 rv = read(0, &abuf[strlen(abuf)], 1);
1600                         }
1601                 } while (FD_ISSET(0, &rfds));
1602
1603                 for (a = 0; !IsEmptyStr(&abuf[a]); ++a) {
1604                         if ((abuf[a] == 27) && (abuf[a + 1] == '[')
1605                             && (abuf[a + 2] == '?')) {
1606                                 enable_color = 1;
1607                         }
1608                 }
1609         }
1610 }
1611
1612
1613 /*
1614  * Display key options (highlight hotkeys inside angle brackets)
1615  */
1616 void keyopt(char *buf) {
1617         int i;
1618
1619         color(DIM_WHITE);
1620         for (i=0; !IsEmptyStr(&buf[i]); ++i) {
1621                 if (buf[i]=='<') {
1622                         pprintf("%c", buf[i]);
1623                         color(BRIGHT_MAGENTA);
1624                 } else {
1625                         if (buf[i]=='>'&& buf[i+1] != '>') {
1626                                 color(DIM_WHITE);
1627                         }
1628                         pprintf("%c", buf[i]);
1629                 }
1630         }
1631         color(DIM_WHITE);
1632 }
1633
1634
1635
1636 /*
1637  * Present a key-menu line choice type of thing
1638  */
1639 char keymenu(char *menuprompt, char *menustring) {
1640         int i, c, a;
1641         int choices;
1642         int do_prompt = 0;
1643         char buf[1024];
1644         int ch;
1645         int display_prompt = 1;
1646
1647         choices = num_tokens(menustring, '|');
1648
1649         if (menuprompt != NULL) do_prompt = 1;
1650         if ((menuprompt != NULL) && (IsEmptyStr(menuprompt))) do_prompt = 0;
1651
1652         while (1) {
1653                 if (display_prompt) {
1654                         if (do_prompt) {
1655                                 scr_printf("%s ", menuprompt);
1656                         }
1657                         else {
1658                                 for (i=0; i<choices; ++i) {
1659                                         extract_token(buf, menustring, i, '|', sizeof buf);
1660                                         keyopt(buf);
1661                                         scr_printf(" ");
1662                                 }
1663                         }
1664                         scr_printf("-> ");
1665                         display_prompt = 0;
1666                 }
1667                 ch = lkey();
1668
1669                 if ( (do_prompt) && (ch=='?') ) {
1670                         scr_printf("\rOne of...                               ");
1671                         scr_printf("                                      \n");
1672                         for (i=0; i<choices; ++i) {
1673                                 extract_token(buf, menustring, i, '|', sizeof buf);
1674                                 scr_printf("   ");
1675                                 keyopt(buf);
1676                                 scr_printf("\n");
1677                         }
1678                         scr_printf("\n");
1679                         display_prompt = 1;
1680                 }
1681
1682                 for (i=0; i<choices; ++i) {
1683                         extract_token(buf, menustring, i, '|', sizeof buf);
1684                         for (c=1; !IsEmptyStr(&buf[c]); ++c) {
1685                                 if ( (ch == tolower(buf[c]))
1686                                    && (buf[c-1]=='<')
1687                                    && (buf[c+1]=='>') ) {
1688                                         for (a=0; !IsEmptyStr(&buf[a]); ++a) {
1689                                                 if ( (a!=(c-1)) && (a!=(c+1))) {
1690                                                         scr_putc(buf[a]);
1691                                                 }
1692                                         }
1693                                         scr_printf("\n");
1694                                         return ch;
1695                                 }
1696                         }
1697                 }
1698         }
1699 }