citadel/commands.c

   1 /*
   2  * $Id$
   3  *
   4  * This file contains functions which implement parts of the
   5  * text-mode user interface.
   6  *
   7  */
   8
   9 #include "sysdep.h"
  10 #include <stdlib.h>
  11 #include <unistd.h>
  12 #include <stdio.h>
  13 #include <fcntl.h>
  14 #include <ctype.h>
  15 #include <string.h>
  16 #include <sys/types.h>
  17 #include <sys/time.h>
  18
  19 #ifdef HAVE_TERMIOS_H
  20 #include <termios.h>
  21 #else
  22 #include <sgtty.h>
  23 #endif
  24
  25 #ifdef HAVE_SYS_SELECT_H
  26 #include <sys/select.h>
  27 #endif
  28
  29 #ifdef THREADED_CLIENT
  30 #include <pthread.h>
  31 #endif
  32
  33 #include <signal.h>
  34 #include <errno.h>
  35 #include <stdarg.h>
  36 #include "citadel.h"
  37 #include "commands.h"
  38 #include "messages.h"
  39 #include "citadel_decls.h"
  40 #include "routines.h"
  41 #include "routines2.h"
  42 #include "tools.h"
  43 #include "rooms.h"
  44 #ifndef HAVE_SNPRINTF
  45 #include "snprintf.h"
  46 #endif
  47
  48 struct citcmd {
  49         struct citcmd *next;
  50         int c_cmdnum;
  51         int c_axlevel;
  52         char c_keys[5][64];
  53 };
  54
  55 #define IFNEXPERT if ((userflags&US_EXPERT)==0)
  56
  57
  58 int rc_exp_beep;
  59 char rc_exp_cmd[256];
  60 int rc_allow_attachments;
  61 int rc_display_message_numbers;
  62 int rc_force_mail_prompts;
  63 int rc_remember_passwords;
  64 int rc_ansi_color;
  65 int num_urls = 0;
  66 char urls[MAXURLS][256];
  67 char rc_url_cmd[256];
  68
  69 char *gl_string;
  70 int next_lazy_cmd = 5;
  71
  72 int lines_printed = 0;          /* line count for paginator */
  73 extern int screenwidth, screenheight;
  74
  75 struct citcmd *cmdlist = NULL;
  76
  77
  78 /* these variables are local to this module */
  79 char keepalives_enabled = KA_YES;       /* send NOOPs to server when idle */
  80 int ok_to_interrupt = 0;                /* print express msgs asynchronously */
  81 time_t AnsiDetect;                      /* when did we send the detect code? */
  82 int enable_color = 0;                   /* nonzero for ANSI color */
  83
  84
  85
  86
  87 /*
  88  * If an interesting key has been pressed, return its value, otherwise 0
  89  */
  90 char was_a_key_pressed(void) {
  91         fd_set rfds;
  92         struct timeval tv;
  93         int the_character;
  94         int retval;
  95
  96         FD_ZERO(&rfds);
  97         FD_SET(0, &rfds);
  98         tv.tv_sec = 0;
  99         tv.tv_usec = 0;
 100         retval = select(1, &rfds, NULL, NULL, &tv);
 101
 102         if (FD_ISSET(0, &rfds)) {
 103                 the_character = inkey();
 104         }
 105         else {
 106                 the_character = 0;
 107         }
 108         return(the_character);
 109 }
 110
 111
 112
 113
 114
 115 /*
 116  * Check to see if we need to pause at the end of a screen.
 117  * If we do, we have to disable server keepalives during the pause because
 118  * we are probably in the middle of a server operation and the NOOP command
 119  * would confuse everything.
 120  */
 121 int checkpagin(int lp, int pagin, int height)
 122 {
 123         int thekey;
 124
 125         if (sigcaught) return(lp);
 126         thekey = was_a_key_pressed();
 127         if ( (thekey == NEXT_KEY) || (thekey == STOP_KEY)) sigcaught = thekey;
 128         if (sigcaught) return(lp);
 129
 130         if (!pagin) return(0);
 131         if (lp>=(height-1)) {
 132                 set_keepalives(KA_NO);
 133                 hit_any_key();
 134                 set_keepalives(KA_YES);
 135                 return(0);
 136                 }
 137         return(lp);
 138         }
 139
 140
 141
 142
 143 /*
 144  * pprintf()  ...   paginated version of printf()
 145  */
 146 void pprintf(const char *format, ...) {
 147         va_list arg_ptr;
 148         static char buf[4096];  /* static for performance, change if needed */
 149         int i;
 150
 151         /* If sigcaught is nonzero, a keypress has interrupted this and we
 152          * should just drain output.
 153          */
 154         if (sigcaught) return;
 155
 156         /* Otherwise, start spewing... */
 157         va_start(arg_ptr, format);
 158         vsprintf(buf, format, arg_ptr);
 159         va_end(arg_ptr);
 160
 161         for (i=0; i<strlen(buf); ++i) {
 162                 putc(buf[i], stdout);
 163                 if (buf[i]==10) {
 164                         ++lines_printed;
 165                         lines_printed = checkpagin(lines_printed,
 166                                 (userflags & US_PAGINATOR),
 167                                 screenheight);
 168                 }
 169         }
 170 }
 171
 172
 173
 174 /*
 175  * print_express()  -  print express messages if there are any
 176  */
 177 void print_express(void)
 178 {
 179         char buf[256];
 180         FILE *outpipe;
 181
 182         if (express_msgs == 0)
 183                 return;
 184         express_msgs = 0;
 185         serv_puts("PEXP");
 186         serv_gets(buf);
 187         if (buf[0] != '1')
 188                 return;
 189
 190         if (strlen(rc_exp_cmd) > 0) {
 191                 outpipe = popen(rc_exp_cmd, "w");
 192                 if (outpipe != NULL) {
 193                         while (serv_gets(buf), strcmp(buf, "000")) {
 194                                 fprintf(outpipe, "%s\n", buf);
 195                         }
 196                         pclose(outpipe);
 197                         return;
 198                 }
 199         }
 200         /* fall back to built-in express message display */
 201         if (rc_exp_beep) {
 202                 putc(7, stdout);
 203         }
 204         color(BRIGHT_RED);
 205         printf("\r---\n");
 206         while (serv_gets(buf), strcmp(buf, "000")) {
 207                 printf("%s\n", buf);
 208         }
 209         printf("---\n");
 210         color(BRIGHT_WHITE);
 211 }
 212
 213
 214 void set_keepalives(int s)
 215 {
 216         keepalives_enabled = (char) s;
 217 }
 218
 219 /*
 220  * This loop handles the "keepalive" messages sent to the server when idling.
 221  */
 222
 223 static time_t idlet = 0;
 224 static void really_do_keepalive(void) {
 225         char buf[256];
 226
 227         time(&idlet);
 228         if (keepalives_enabled != KA_NO) {
 229                 serv_puts("NOOP");
 230                 if (keepalives_enabled == KA_YES) {
 231                         serv_gets(buf);
 232                         if (buf[3] == '*') {
 233                                 express_msgs = 1;
 234                                 if (ok_to_interrupt == 1) {
 235                                         printf("\r%64s\r", "");
 236                                         print_express();
 237                                         printf("%s%c ", room_name,
 238                                                room_prompt(room_flags));
 239                                         fflush(stdout);
 240                                 }
 241                         }
 242                 }
 243         }
 244 }
 245
 246 /* threaded nonblocking keepalive stuff starts here. I'm going for a simple
 247    encapsulated interface; in theory there should be no need to touch these
 248    globals outside of the async_ka_* functions. */
 249
 250 #ifdef THREADED_CLIENT
 251 static pthread_t ka_thr_handle;
 252 static int ka_thr_active = 0;
 253 static int async_ka_enabled = 0;
 254
 255 static void *ka_thread(void *arg)
 256 {
 257         really_do_keepalive();
 258         pthread_detach(ka_thr_handle);
 259         ka_thr_active = 0;
 260         return NULL;
 261 }
 262
 263 /* start up a thread to handle a keepalive in the background */
 264 static void async_ka_exec(void)
 265 {
 266         if (!ka_thr_active) {
 267                 ka_thr_active = 1;
 268                 if (pthread_create(&ka_thr_handle, NULL, ka_thread, NULL)) {
 269                         perror("pthread_create");
 270                         exit(1);
 271                 }
 272         }
 273 }
 274 #endif /* THREADED_CLIENT */
 275
 276 static void do_keepalive(void)
 277 {
 278         time_t now;
 279
 280         time(&now);
 281         if ((now - idlet) < ((long) S_KEEPALIVE))
 282                 return;
 283
 284         /* Do a space-backspace to keep telnet sessions from idling out */
 285         printf(" %c", 8);
 286         fflush(stdout);
 287
 288 #ifdef THREADED_CLIENT
 289         if (async_ka_enabled)
 290                 async_ka_exec();
 291         else
 292 #endif
 293                 really_do_keepalive();
 294 }
 295
 296
 297 /* Now the actual async-keepalve API that we expose to higher levels:
 298    async_ka_start() and async_ka_end(). These do nothing when we don't have
 299    threading enabled, so we avoid sprinkling ifdef's throughout the code. */
 300
 301 /* wait for a background keepalive to complete. this must be done before
 302    attempting any further server requests! */
 303 void async_ka_end(void)
 304 {
 305 #ifdef THREADED_CLIENT
 306         if (ka_thr_active)
 307                 pthread_join(ka_thr_handle, NULL);
 308
 309         async_ka_enabled--;
 310 #endif
 311 }
 312
 313 /* tell do_keepalive() that keepalives are asynchronous. */
 314 void async_ka_start(void)
 315 {
 316 #ifdef THREADED_CLIENT
 317         async_ka_enabled++;
 318 #endif
 319 }
 320
 321
 322 int inkey(void)
 323 {                               /* get a character from the keyboard, with   */
 324         int a;                  /* the watchdog timer in effect if necessary */
 325         fd_set rfds;
 326         struct timeval tv;
 327         time_t start_time, now;
 328         char inbuf[2];
 329
 330         fflush(stdout);
 331         lines_printed = 0;
 332         time(&start_time);
 333
 334         do {
 335
 336                 /* This loop waits for keyboard input.  If the keepalive
 337                  * timer expires, it sends a keepalive to the server if
 338                  * necessary and then waits again.
 339                  */
 340                 do {
 341                         do_keepalive();
 342
 343                         FD_ZERO(&rfds);
 344                         FD_SET(0, &rfds);
 345                         tv.tv_sec = S_KEEPALIVE;
 346                         tv.tv_usec = 0;
 347
 348                         time(&now);
 349                         if (((now - start_time) > SLEEPING)
 350                             && (SLEEPING != 0) && (getppid() == 1)) {
 351                                 printf("Sleeping? Call again.\n");
 352                                 logoff(SIGALRM);
 353                         }
 354                         select(1, &rfds, NULL, NULL, &tv);
 355                 } while (!FD_ISSET(0, &rfds));
 356
 357
 358
 359
 360                 /* At this point, there's input, so fetch it.
 361                  * (There's a hole in the bucket...)
 362                  */
 363                 read(0, inbuf, 1);
 364                 a = inbuf[0];
 365                 if (a == 127)
 366                         a = 8;
 367                 if (a > 126)
 368                         a = 0;
 369                 if (a == 10)
 370                         a = 13;
 371                 if (((a != 4) && (a != 13) && (a != 8) && (a != NEXT_KEY) && (a != STOP_KEY))
 372                     && ((a < 32) || (a > 126)))
 373                         a = 0;
 374         } while (a == 0);
 375         return (a);
 376 }
 377
 378
 379 int yesno(void)
 380 {                               /* Returns 1 for yes, 0 for no */
 381         int a;
 382         while (1) {
 383                 a = inkey();
 384                 a = tolower(a);
 385                 if (a == 'y') {
 386                         printf("Yes\n");
 387                         return (1);
 388                 }
 389                 if (a == 'n') {
 390                         printf("No\n");
 391                         return (0);
 392                 }
 393         }
 394 }
 395
 396 /* Returns 1 for yes, 0 for no, arg is default value */
 397 int yesno_d(int d)
 398 {
 399         int a;
 400         while (1) {
 401                 a = inkey();
 402                 a = tolower(a);
 403                 if (a == 13)
 404                         a = (d ? 'y' : 'n');
 405                 if (a == 'y') {
 406                         printf("Yes\n");
 407                         return (1);
 408                 }
 409                 if (a == 'n') {
 410                         printf("No\n");
 411                         return (0);
 412                 }
 413         }
 414 }
 415
 416
 417
 418
 419 /* Gets a line from the terminal */
 420 /* string == Pointer to string buffer */
 421 /* lim == Maximum length - if negative, no-show */
 422 void getline(char *string, int lim)
 423 {
 424         int a, b;
 425         char flag = 0;
 426
 427         if (lim < 0) {
 428                 lim = (0 - lim);
 429                 flag = 1;
 430         }
 431         strcpy(string, "");
 432         gl_string = string;
 433         async_ka_start();
 434       GLA:a = inkey();
 435         a = (a & 127);
 436         if ((a == 8) && (strlen(string) == 0))
 437                 goto GLA;
 438         if ((a != 13) && (a != 8) && (strlen(string) == lim))
 439                 goto GLA;
 440         if ((a == 8) && (string[0] != 0)) {
 441                 string[strlen(string) - 1] = 0;
 442                 putc(8, stdout);
 443                 putc(32, stdout);
 444                 putc(8, stdout);
 445                 goto GLA;
 446         }
 447         if ((a == 13) || (a == 10)) {
 448                 putc(13, stdout);
 449                 putc(10, stdout);
 450                 async_ka_end();
 451                 return;
 452         }
 453         if (a < 32)
 454                 a = '.';
 455         b = strlen(string);
 456         string[b] = a;
 457         string[b + 1] = 0;
 458         if (flag == 0)
 459                 putc(a, stdout);
 460         if (flag == 1)
 461                 putc('*', stdout);
 462         goto GLA;
 463 }
 464
 465
 466 /*
 467  * strprompt()  -  prompt for a string, print the existing value and
 468  *                 allow the user to press return to keep it...
 469  */
 470 void strprompt(char *prompt, char *str, int len)
 471 {
 472         char buf[128];
 473         print_express();
 474         color(DIM_WHITE);
 475         printf("%s ", prompt);
 476         color(DIM_MAGENTA);
 477         printf("[");
 478         color(BRIGHT_MAGENTA);
 479         printf("%s", str);
 480         color(DIM_MAGENTA);
 481         printf("]");
 482         color(DIM_WHITE);
 483         printf(": ");
 484         color(BRIGHT_CYAN);
 485         getline(buf, len);
 486         if (buf[0] != 0)
 487                 strcpy(str, buf);
 488         color(DIM_WHITE);
 489 }
 490
 491 /*
 492  * boolprompt()  -  prompt for a yes/no, print the existing value and
 493  *                  allow the user to press return to keep it...
 494  */
 495 int boolprompt(char *prompt, int prev_val)
 496 {
 497         int r;
 498
 499         color(DIM_WHITE);
 500         printf("%s ", prompt);
 501         color(DIM_MAGENTA);
 502         printf(" [");
 503         color(BRIGHT_MAGENTA);
 504         printf("%s", (prev_val ? "Yes" : "No"));
 505         color(DIM_MAGENTA);
 506         printf("]: ");
 507         color(BRIGHT_CYAN);
 508         r = (yesno_d(prev_val));
 509         color(DIM_WHITE);
 510         return r;
 511 }
 512
 513 /*
 514  * intprompt()  -  like strprompt(), except for an integer
 515  *                 (note that it RETURNS the new value!)
 516  */
 517 int intprompt(char *prompt, int ival, int imin, int imax)
 518 {
 519         char buf[16];
 520         int i;
 521         int p;
 522
 523         do {
 524                 i = ival;
 525                 snprintf(buf, sizeof buf, "%d", i);
 526                 strprompt(prompt, buf, 15);
 527                 i = atoi(buf);
 528                 for (p=0; p<strlen(buf); ++p) {
 529                         if ( (!isdigit(buf[p]))
 530                            && ( (buf[p]!='-') || (p!=0) )  )
 531                                 i = imin - 1;
 532                 }
 533                 if (i < imin)
 534                         printf("*** Must be no less than %d.\n", imin);
 535                 if (i > imax)
 536                         printf("*** Must be no more than %d.\n", imax);
 537         } while ((i < imin) || (i > imax));
 538         return (i);
 539 }
 540
 541 /*
 542  * newprompt()  -  prompt for a string with no existing value
 543  *                 (clears out string buffer first)
 544  */
 545 void newprompt(char *prompt, char *str, int len)
 546 {
 547         color(BRIGHT_MAGENTA);
 548         printf("%s", prompt);
 549         color(DIM_MAGENTA);
 550         getline(str, len);
 551         color(DIM_WHITE);
 552 }
 553
 554
 555 int lkey(void)
 556 {                               /* returns a lower case value */
 557         int a;
 558         a = inkey();
 559         if (isupper(a))
 560                 a = tolower(a);
 561         return (a);
 562 }
 563
 564 /*
 565  * parse the citadel.rc file
 566  */
 567 void load_command_set(void)
 568 {
 569         FILE *ccfile;
 570         char buf[256];
 571         struct citcmd *cptr;
 572         struct citcmd *lastcmd = NULL;
 573         int a, d;
 574         int b = 0;
 575
 576
 577         /* first, set up some defaults for non-required variables */
 578
 579         strcpy(editor_path, "");
 580         strcpy(printcmd, "");
 581         strcpy(rc_username, "");
 582         strcpy(rc_password, "");
 583         rc_floor_mode = 0;
 584         rc_exp_beep = 1;
 585         rc_allow_attachments = 0;
 586         rc_remember_passwords = 0;
 587         strcpy(rc_exp_cmd, "");
 588         rc_display_message_numbers = 0;
 589         rc_force_mail_prompts = 0;
 590         rc_ansi_color = 0;
 591         strcpy(rc_url_cmd, "");
 592
 593         /* now try to open the citadel.rc file */
 594
 595         ccfile = NULL;
 596         if (getenv("HOME") != NULL) {
 597                 snprintf(buf, sizeof buf, "%s/.citadelrc", getenv("HOME"));
 598                 ccfile = fopen(buf, "r");
 599         }
 600         if (ccfile == NULL) {
 601                 ccfile = fopen("/usr/local/lib/citadel.rc", "r");
 602         }
 603         if (ccfile == NULL) {
 604                 snprintf(buf, sizeof buf, "%s/citadel.rc", BBSDIR);
 605                 ccfile = fopen(buf, "r");
 606         }
 607         if (ccfile == NULL) {
 608                 ccfile = fopen("./citadel.rc", "r");
 609         }
 610         if (ccfile == NULL) {
 611                 perror("commands: cannot open citadel.rc");
 612                 logoff(errno);
 613         }
 614         while (fgets(buf, 256, ccfile) != NULL) {
 615                 while ((strlen(buf) > 0) ? (isspace(buf[strlen(buf) - 1])) : 0)
 616                         buf[strlen(buf) - 1] = 0;
 617
 618                 if (!strncasecmp(buf, "editor=", 7))
 619                         strcpy(editor_path, &buf[7]);
 620
 621                 if (!strncasecmp(buf, "printcmd=", 9))
 622                         strcpy(printcmd, &buf[9]);
 623
 624                 if (!strncasecmp(buf, "expcmd=", 7))
 625                         strcpy(rc_exp_cmd, &buf[7]);
 626
 627                 if (!strncasecmp(buf, "local_screen_dimensions=", 24))
 628                         have_xterm = (char) atoi(&buf[24]);
 629
 630                 if (!strncasecmp(buf, "use_floors=", 11)) {
 631                         if (!strcasecmp(&buf[11], "yes"))
 632                                 rc_floor_mode = RC_YES;
 633                         if (!strcasecmp(&buf[11], "no"))
 634                                 rc_floor_mode = RC_NO;
 635                         if (!strcasecmp(&buf[11], "default"))
 636                                 rc_floor_mode = RC_DEFAULT;
 637                 }
 638                 if (!strncasecmp(buf, "beep=", 5)) {
 639                         rc_exp_beep = atoi(&buf[5]);
 640                 }
 641                 if (!strncasecmp(buf, "allow_attachments=", 18)) {
 642                         rc_allow_attachments = atoi(&buf[18]);
 643                 }
 644                 if (!strncasecmp(buf, "remember_passwords=", 19)) {
 645                         rc_remember_passwords = atoi(&buf[19]);
 646                 }
 647                 if (!strncasecmp(buf, "display_message_numbers=", 24)) {
 648                         rc_display_message_numbers = atoi(&buf[24]);
 649                 }
 650                 if (!strncasecmp(buf, "force_mail_prompts=", 19)) {
 651                         rc_force_mail_prompts = atoi(&buf[19]);
 652                 }
 653                 if (!strncasecmp(buf, "ansi_color=", 11)) {
 654                         if (!strncasecmp(&buf[11], "on", 2))
 655                                 rc_ansi_color = 1;
 656                         if (!strncasecmp(&buf[11], "auto", 4))
 657                                 rc_ansi_color = 2;      /* autodetect */
 658                         if (!strncasecmp(&buf[11], "user", 4))
 659                                 rc_ansi_color = 3;      /* user config */
 660                 }
 661                 if (!strncasecmp(buf, "username=", 9))
 662                         strcpy(rc_username, &buf[9]);
 663
 664                 if (!strncasecmp(buf, "password=", 9))
 665                         strcpy(rc_password, &buf[9]);
 666
 667                 if (!strncasecmp(buf, "urlcmd=", 7))
 668                         strcpy(rc_url_cmd, &buf[7]);
 669
 670                 if (!strncasecmp(buf, "cmd=", 4)) {
 671                         strcpy(buf, &buf[4]);
 672
 673                         cptr = (struct citcmd *) malloc(sizeof(struct citcmd));
 674
 675                         cptr->c_cmdnum = atoi(buf);
 676                         for (d = strlen(buf); d >= 0; --d)
 677                                 if (buf[d] == ',')
 678                                         b = d;
 679                         strcpy(buf, &buf[b + 1]);
 680
 681                         cptr->c_axlevel = atoi(buf);
 682                         for (d = strlen(buf); d >= 0; --d)
 683                                 if (buf[d] == ',')
 684                                         b = d;
 685                         strcpy(buf, &buf[b + 1]);
 686
 687                         for (a = 0; a < 5; ++a)
 688                                 cptr->c_keys[a][0] = 0;
 689
 690                         a = 0;
 691                         b = 0;
 692                         buf[strlen(buf) + 1] = 0;
 693                         while (strlen(buf) > 0) {
 694                                 b = strlen(buf);
 695                                 for (d = strlen(buf); d >= 0; --d)
 696                                         if (buf[d] == ',')
 697                                                 b = d;
 698                                 strncpy(cptr->c_keys[a], buf, b);
 699                                 cptr->c_keys[a][b] = 0;
 700                                 if (buf[b] == ',')
 701                                         strcpy(buf, &buf[b + 1]);
 702                                 else
 703                                         strcpy(buf, "");
 704                                 ++a;
 705                         }
 706
 707                         cptr->next = NULL;
 708                         if (cmdlist == NULL)
 709                                 cmdlist = cptr;
 710                         else
 711                                 lastcmd->next = cptr;
 712                         lastcmd = cptr;
 713                 }
 714         }
 715         fclose(ccfile);
 716 }
 717
 718
 719
 720 /*
 721  * return the key associated with a command
 722  */
 723 char keycmd(char *cmdstr)
 724 {
 725         int a;
 726
 727         for (a = 0; a < strlen(cmdstr); ++a)
 728                 if (cmdstr[a] == '&')
 729                         return (tolower(cmdstr[a + 1]));
 730         return (0);
 731 }
 732
 733
 734 /*
 735  * Output the string from a key command without the ampersand
 736  * "mode" should be set to 0 for normal or 1 for <C>ommand key highlighting
 737  */
 738 char *cmd_expand(char *strbuf, int mode)
 739 {
 740         int a;
 741         static char exp[64];
 742         char buf[256];
 743
 744         strcpy(exp, strbuf);
 745
 746         for (a = 0; a < strlen(exp); ++a) {
 747                 if (strbuf[a] == '&') {
 748
 749                         if (mode == 0) {
 750                                 strcpy(&exp[a], &exp[a + 1]);
 751                         }
 752                         if (mode == 1) {
 753                                 exp[a] = '<';
 754                                 strcpy(buf, &exp[a + 2]);
 755                                 exp[a + 2] = '>';
 756                                 exp[a + 3] = 0;
 757                                 strcat(exp, buf);
 758                         }
 759                 }
 760                 if (!strncmp(&exp[a], "^r", 2)) {
 761                         strcpy(buf, exp);
 762                         strcpy(&exp[a], room_name);
 763                         strcat(exp, &buf[a + 2]);
 764                 }
 765                 if (!strncmp(&exp[a], "^c", 2)) {
 766                         exp[a] = ',';
 767                         strcpy(&exp[a + 1], &exp[a + 2]);
 768                 }
 769         }
 770
 771         return (exp);
 772 }
 773
 774
 775
 776 /*
 777  * Comparison function to determine if entered commands match a
 778  * command loaded from the config file.
 779  */
 780 int cmdmatch(char *cmdbuf, struct citcmd *cptr, int ncomp)
 781 {
 782         int a;
 783         int cmdax;
 784
 785         cmdax = 0;
 786         if (is_room_aide)
 787                 cmdax = 1;
 788         if (axlevel >= 6)
 789                 cmdax = 2;
 790
 791         for (a = 0; a < ncomp; ++a) {
 792                 if ((tolower(cmdbuf[a]) != keycmd(cptr->c_keys[a]))
 793                     || (cptr->c_axlevel > cmdax))
 794                         return (0);
 795         }
 796         return (1);
 797 }
 798
 799
 800 /*
 801  * This function returns 1 if a given command requires a string input
 802  */
 803 int requires_string(struct citcmd *cptr, int ncomp)
 804 {
 805         int a;
 806         char buf[64];
 807
 808         strcpy(buf, cptr->c_keys[ncomp - 1]);
 809         for (a = 0; a < strlen(buf); ++a) {
 810                 if (buf[a] == ':')
 811                         return (1);
 812         }
 813         return (0);
 814 }
 815
 816
 817 /*
 818  * Input a command at the main prompt.
 819  * This function returns an integer command number.  If the command prompts
 820  * for a string then it is placed in the supplied buffer.
 821  */
 822 int getcmd(char *argbuf)
 823 {
 824         char cmdbuf[5];
 825         int cmdspaces[5];
 826         int cmdpos;
 827         int ch;
 828         int a;
 829         int got;
 830         int this_lazy_cmd;
 831         struct citcmd *cptr;
 832
 833         /*
 834          * Starting a new command now, so set sigcaught to 0.  This variable
 835          * is set to nonzero (usually NEXT_KEY or STOP_KEY) if a command has
 836          * been interrupted by a keypress.
 837          */
 838         sigcaught = 0;
 839
 840         /* Switch color support on or off if we're in user mode */
 841         if (rc_ansi_color == 3) {
 842                 if (userflags & US_COLOR)
 843                         enable_color = 1;
 844                 else
 845                         enable_color = 0;
 846         }
 847         /* if we're running in idiot mode, display a cute little menu */
 848         IFNEXPERT formout("mainmenu");
 849
 850         print_express();        /* print express messages if there are any */
 851         strcpy(argbuf, "");
 852         cmdpos = 0;
 853         for (a = 0; a < 5; ++a)
 854                 cmdbuf[a] = 0;
 855         /* now the room prompt... */
 856         ok_to_interrupt = 1;
 857         color(BRIGHT_WHITE);
 858         printf("\n%s", room_name);
 859         color(DIM_WHITE);
 860         printf("%c ", room_prompt(room_flags));
 861         fflush(stdout);
 862
 863         while (1) {
 864                 ch = inkey();
 865                 ok_to_interrupt = 0;
 866
 867                 /* Handle the backspace key, but only if there's something
 868                  * to backspace over...
 869                  */
 870                 if ((ch == 8) && (cmdpos > 0)) {
 871                         back(cmdspaces[cmdpos - 1] + 1);
 872                         cmdbuf[cmdpos] = 0;
 873                         --cmdpos;
 874                 }
 875                 /* Spacebar invokes "lazy traversal" commands */
 876                 if ((ch == 32) && (cmdpos == 0)) {
 877                         this_lazy_cmd = next_lazy_cmd;
 878                         if (this_lazy_cmd == 13)
 879                                 next_lazy_cmd = 5;
 880                         if (this_lazy_cmd == 5)
 881                                 next_lazy_cmd = 13;
 882                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 883                                 if (cptr->c_cmdnum == this_lazy_cmd) {
 884                                         for (a = 0; a < 5; ++a)
 885                                                 if (cptr->c_keys[a][0] != 0)
 886                                                         printf("%s ", cmd_expand(
 887                                                                                         cptr->c_keys[a], 0));
 888                                         printf("\n");
 889                                         return (this_lazy_cmd);
 890                                 }
 891                         }
 892                         printf("\n");
 893                         return (this_lazy_cmd);
 894                 }
 895                 /* Otherwise, process the command */
 896                 cmdbuf[cmdpos] = tolower(ch);
 897
 898                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 899                         if (cmdmatch(cmdbuf, cptr, cmdpos + 1)) {
 900
 901                                 printf("%s", cmd_expand(cptr->c_keys[cmdpos], 0));
 902                                 cmdspaces[cmdpos] = strlen(
 903                                     cmd_expand(cptr->c_keys[cmdpos], 0));
 904                                 if (cmdpos < 4)
 905                                         if ((cptr->c_keys[cmdpos + 1]) != 0)
 906                                                 putc(' ', stdout);
 907                                 ++cmdpos;
 908                         }
 909                 }
 910
 911                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 912                         if (cmdmatch(cmdbuf, cptr, 5)) {
 913                                 /* We've found our command. */
 914                                 if (requires_string(cptr, cmdpos)) {
 915                                         getline(argbuf, 32);
 916                                 } else {
 917                                         printf("\n");
 918                                 }
 919
 920                                 /* If this command is one that changes rooms,
 921                                  * then the next lazy-command (space bar)
 922                                  * should be "read new" instead of "goto"
 923                                  */
 924                                 if ((cptr->c_cmdnum == 5)
 925                                     || (cptr->c_cmdnum == 6)
 926                                     || (cptr->c_cmdnum == 47)
 927                                     || (cptr->c_cmdnum == 52)
 928                                     || (cptr->c_cmdnum == 16)
 929                                     || (cptr->c_cmdnum == 20))
 930                                         next_lazy_cmd = 13;
 931
 932                                 return (cptr->c_cmdnum);
 933
 934                         }
 935                 }
 936
 937                 if (ch == '?') {
 938                         printf("\rOne of ...                         \n");
 939                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 940                                 if (cmdmatch(cmdbuf, cptr, cmdpos)) {
 941                                         for (a = 0; a < 5; ++a) {
 942                                                 printf("%s ", cmd_expand(cptr->c_keys[a], 1));
 943                                         }
 944                                         printf("\n");
 945                                 }
 946                         }
 947
 948                         printf("\n%s%c ", room_name, room_prompt(room_flags));
 949                         got = 0;
 950                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 951                                 if ((got == 0) && (cmdmatch(cmdbuf, cptr, cmdpos))) {
 952                                         for (a = 0; a < cmdpos; ++a) {
 953                                                 printf("%s ",
 954                                                        cmd_expand(cptr->c_keys[a], 0));
 955                                         }
 956                                         got = 1;
 957                                 }
 958                         }
 959                 }
 960         }
 961
 962 }
 963
 964
 965
 966
 967
 968 /*
 969  * set tty modes.  commands are:
 970  *
 971  * 01- set to bbs mode
 972  * 2 - save current settings for later restoral
 973  * 3 - restore saved settings
 974  */
 975 #ifdef HAVE_TERMIOS_H
 976 void sttybbs(int cmd)
 977 {                               /* SysV version of sttybbs() */
 978         struct termios live;
 979         static struct termios saved_settings;
 980         static int last_cmd = 0;
 981
 982         if (cmd == SB_LAST)
 983                 cmd = last_cmd;
 984         else
 985                 last_cmd = cmd;
 986
 987         if ((cmd == 0) || (cmd == 1)) {
 988                 tcgetattr(0, &live);
 989                 live.c_iflag = ISTRIP | IXON | IXANY;
 990                 live.c_oflag = OPOST | ONLCR;
 991                 live.c_lflag = ISIG | NOFLSH;
 992
 993                 live.c_cc[VINTR] = (-1);
 994                 live.c_cc[VQUIT] = (-1);
 995
 996                 /* do we even need this stuff anymore? */
 997                 /* live.c_line=0; */
 998                 live.c_cc[VERASE] = 8;
 999                 live.c_cc[VKILL] = 24;
1000                 live.c_cc[VEOF] = 1;
1001                 live.c_cc[VEOL] = 255;
1002                 live.c_cc[VEOL2] = 0;
1003                 live.c_cc[VSTART] = 0;
1004                 tcsetattr(0, TCSADRAIN, &live);
1005         }
1006         if (cmd == 2) {
1007                 tcgetattr(0, &saved_settings);
1008         }
1009         if (cmd == 3) {
1010                 tcsetattr(0, TCSADRAIN, &saved_settings);
1011         }
1012 }
1013 #else
1014 void sttybbs(int cmd)
1015 {                               /* BSD version of sttybbs() */
1016         struct sgttyb live;
1017         static struct sgttyb saved_settings;
1018
1019         if ((cmd == 0) || (cmd == 1)) {
1020                 gtty(0, &live);
1021                 live.sg_flags |= CBREAK;
1022                 live.sg_flags |= CRMOD;
1023                 live.sg_flags |= NL1;
1024                 live.sg_flags &= ~ECHO;
1025                 if (cmd == 1)
1026                         live.sg_flags |= NOFLSH;
1027                 stty(0, &live);
1028         }
1029         if (cmd == 2) {
1030                 gtty(0, &saved_settings);
1031         }
1032         if (cmd == 3) {
1033                 stty(0, &saved_settings);
1034         }
1035 }
1036 #endif
1037
1038
1039 /*
1040  * display_help()  -  help file viewer
1041  */
1042 void display_help(char *name)
1043 {
1044         formout(name);
1045 }
1046
1047
1048 /*
1049  * fmout()  -  Citadel text formatter and paginator
1050  */
1051 int fmout(
1052         int width,      /* screen width to use */
1053         FILE *fp,       /* file to read from, or NULL to read from server */
1054         char pagin,     /* nonzero if we should use the paginator */
1055         int height,     /* screen height to use */
1056         int starting_lp,/* starting value for lines_printed, -1 for global */
1057         char subst)     /* nonzero if we should use hypertext mode */
1058 {
1059         int a, b, c, d, old;
1060         int real = (-1);
1061         char aaa[140];
1062         char buffer[512];
1063         int eof_flag = 0;
1064
1065         num_urls = 0;   /* Start with a clean slate of embedded URL's */
1066
1067         if (starting_lp >= 0) {
1068                 lines_printed = starting_lp;
1069         }
1070         strcpy(aaa, "");
1071         old = 255;
1072         strcpy(buffer, "");
1073         c = 1;                  /* c is the current pos */
1074
1075 FMTA:   while ((eof_flag == 0) && (strlen(buffer) < 126)) {
1076                 if (fp != NULL) {       /* read from file */
1077                         if (feof(fp))
1078                                 eof_flag = 1;
1079                         if (eof_flag == 0) {
1080                                 a = getc(fp);
1081                                 buffer[strlen(buffer) + 1] = 0;
1082                                 buffer[strlen(buffer)] = a;
1083                         }
1084                 } else {        /* read from server */
1085                         d = strlen(buffer);
1086                         serv_gets(&buffer[d]);
1087                         while ((!isspace(buffer[d])) && (isspace(buffer[strlen(buffer) - 1])))
1088                                 buffer[strlen(buffer) - 1] = 0;
1089                         if (!strcmp(&buffer[d], "000")) {
1090                                 buffer[d] = 0;
1091                                 eof_flag = 1;
1092                                 while (isspace(buffer[strlen(buffer) - 1]))
1093                                         buffer[strlen(buffer) - 1] = 0;
1094                         }
1095                         d = strlen(buffer);
1096                         buffer[d] = 10;
1097                         buffer[d + 1] = 0;
1098                 }
1099         }
1100
1101         if ( (!strncasecmp(buffer, "http://", 7))
1102            || (!strncasecmp(buffer, "ftp://", 6)) ) {
1103                 safestrncpy(urls[num_urls], buffer, 255);
1104                 for (a=0; a<strlen(urls[num_urls]); ++a) {
1105                         b = urls[num_urls][a];
1106                         if ( (b==' ') || (b==')') || (b=='>') || (b==10)
1107                            || (b==13) || (b==9) || (b=='\"') )
1108                                 urls[num_urls][a] = 0;
1109                 }
1110                 ++num_urls;
1111         }
1112
1113         buffer[strlen(buffer) + 1] = 0;
1114         a = buffer[0];
1115         strcpy(buffer, &buffer[1]);
1116
1117         old = real;
1118         real = a;
1119         if (a <= 0)
1120                 goto FMTEND;
1121
1122         if (((a == 13) || (a == 10)) && (old != 13) && (old != 10))
1123                 a = 32;
1124         if (((old == 13) || (old == 10)) && (isspace(real))) {
1125                 printf("\n");
1126                 ++lines_printed;
1127                 lines_printed = checkpagin(lines_printed, pagin, height);
1128                 c = 1;
1129         }
1130         if (a > 126)
1131                 goto FMTA;
1132
1133         if (a > 32) {
1134                 if (((strlen(aaa) + c) > (width - 5)) && (strlen(aaa) > (width - 5))) {
1135                         printf("\n%s", aaa);
1136                         c = strlen(aaa);
1137                         aaa[0] = 0;
1138                         ++lines_printed;
1139                         lines_printed = checkpagin(lines_printed, pagin, height);
1140                 }
1141                 b = strlen(aaa);
1142                 aaa[b] = a;
1143                 aaa[b + 1] = 0;
1144         }
1145         if (a == 32) {
1146                 if ((strlen(aaa) + c) > (width - 5)) {
1147                         c = 1;
1148                         printf("\n");
1149                         ++lines_printed;
1150                         lines_printed = checkpagin(lines_printed, pagin, height);
1151                 }
1152                 printf("%s ", aaa);
1153                 ++c;
1154                 c = c + strlen(aaa);
1155                 strcpy(aaa, "");
1156                 goto FMTA;
1157         }
1158         if ((a == 13) || (a == 10)) {
1159                 printf("%s\n", aaa);
1160                 c = 1;
1161                 ++lines_printed;
1162                 lines_printed = checkpagin(lines_printed, pagin, height);
1163                 if (sigcaught) goto OOPS;
1164                 strcpy(aaa, "");
1165                 goto FMTA;
1166         }
1167         goto FMTA;
1168
1169         /* keypress caught; drain the server */
1170 OOPS:   do {
1171                 serv_gets(aaa);
1172         } while (strcmp(aaa, "000"));
1173
1174 FMTEND: printf("\n");
1175         ++lines_printed;
1176         lines_printed = checkpagin(lines_printed, pagin, height);
1177         return (sigcaught);
1178 }
1179
1180
1181 /*
1182  * support ANSI color if defined
1183  */
1184 void color(int colornum)
1185 {
1186         static int is_bold = 0;
1187         static int hold_color, current_color;
1188
1189         if (colornum == COLOR_PUSH) {
1190                 hold_color = current_color;
1191                 return;
1192         }
1193
1194         if (colornum == COLOR_POP) {
1195                 color(hold_color);
1196                 return;
1197         }
1198
1199         current_color = colornum;
1200         if (enable_color) {
1201                 /* When switching to dim white, actually output an 'original
1202                  * pair' sequence -- this looks better on black-on-white
1203                  * terminals.
1204                  */
1205                 if (colornum == DIM_WHITE)
1206                         printf("\033[39;49m");
1207                 else
1208                         printf("\033[3%d;40m", (colornum & 7));
1209
1210                 if ((colornum >= 8) && (is_bold == 0)) {
1211                         printf("\033[1m");
1212                         is_bold = 1;
1213                 } else if ((colornum < 8) && (is_bold == 1)) {
1214                         printf("\033[0m");
1215                         is_bold = 0;
1216                 }
1217                 fflush(stdout);
1218         }
1219 }
1220
1221 void cls(int colornum)
1222 {
1223         if (enable_color) {
1224                 printf("\033[4%dm\033[2J\033[H\033[0m", colornum);
1225                 fflush(stdout);
1226         }
1227 }
1228
1229
1230 /*
1231  * Detect whether ANSI color is available (answerback)
1232  */
1233 void send_ansi_detect(void)
1234 {
1235         if (rc_ansi_color == 2) {
1236                 printf("\033[c");
1237                 fflush(stdout);
1238                 time(&AnsiDetect);
1239         }
1240 }
1241
1242 void look_for_ansi(void)
1243 {
1244         fd_set rfds;
1245         struct timeval tv;
1246         char abuf[512];
1247         time_t now;
1248         int a;
1249
1250         if (rc_ansi_color == 0) {
1251                 enable_color = 0;
1252         } else if (rc_ansi_color == 1) {
1253                 enable_color = 1;
1254         } else if (rc_ansi_color == 2) {
1255
1256                 /* otherwise, do the auto-detect */
1257
1258                 strcpy(abuf, "");
1259
1260                 time(&now);
1261                 if ((now - AnsiDetect) < 2)
1262                         sleep(1);
1263
1264                 do {
1265                         FD_ZERO(&rfds);
1266                         FD_SET(0, &rfds);
1267                         tv.tv_sec = 0;
1268                         tv.tv_usec = 1;
1269
1270                         select(1, &rfds, NULL, NULL, &tv);
1271                         if (FD_ISSET(0, &rfds)) {
1272                                 abuf[strlen(abuf) + 1] = 0;
1273                                 read(0, &abuf[strlen(abuf)], 1);
1274                         }
1275                 } while (FD_ISSET(0, &rfds));
1276
1277                 for (a = 0; a < strlen(abuf); ++a) {
1278                         if ((abuf[a] == 27) && (abuf[a + 1] == '[')
1279                             && (abuf[a + 2] == '?')) {
1280                                 enable_color = 1;
1281                         }
1282                 }
1283         }
1284 }
1285
1286
1287 /*
1288  * Display key options (highlight hotkeys inside angle brackets)
1289  */
1290 void keyopt(char *buf) {
1291         int i;
1292
1293         color(DIM_WHITE);
1294         for (i=0; i<strlen(buf); ++i) {
1295                 if (buf[i]=='<') {
1296                         putc(buf[i], stdout);
1297                         color(BRIGHT_MAGENTA);
1298                 } else {
1299                         if (buf[i]=='>') {
1300                                 color(DIM_WHITE);
1301                         }
1302                         putc(buf[i], stdout);
1303                 }
1304         }
1305         color(DIM_WHITE);
1306 }
1307
1308
1309
1310 /*
1311  * Present a key-menu line choice type of thing
1312  */
1313 char keymenu(char *menuprompt, char *menustring) {
1314         int i, c, a;
1315         int choices;
1316         int do_prompt = 0;
1317         char buf[256];
1318         int ch;
1319         int display_prompt = 1;
1320
1321         choices = num_tokens(menustring, '|');
1322
1323         if (menuprompt != NULL) do_prompt = 1;
1324         if (menuprompt != NULL) if (strlen(menuprompt)==0) do_prompt = 0;
1325
1326         while (1) {
1327                 if (display_prompt) {
1328                         if (do_prompt) {
1329                                 printf("%s ", menuprompt);
1330                         }
1331                         else {
1332                                 for (i=0; i<choices; ++i) {
1333                                         extract(buf, menustring, i);
1334                                         keyopt(buf);
1335                                         printf(" ");
1336                                 }
1337                         }
1338                         printf(" -> ");
1339                         display_prompt = 0;
1340                 }
1341                 ch = lkey();
1342
1343                 if ( (do_prompt) && (ch=='?') ) {
1344                         printf("\rOne of...                               ");
1345                         printf("                                      \n");
1346                         for (i=0; i<choices; ++i) {
1347                                 extract(buf, menustring, i);
1348                                 printf("   ");
1349                                 keyopt(buf);
1350                                 printf("\n");
1351                         }
1352                         printf("\n");
1353                         display_prompt = 1;
1354                 }
1355
1356                 for (i=0; i<choices; ++i) {
1357                         extract(buf, menustring, i);
1358                         for (c=1; c<strlen(buf); ++c) {
1359                                 if ( (ch == tolower(buf[c]))
1360                                    && (buf[c-1]=='<')
1361                                    && (buf[c+1]=='>') ) {
1362                                         for (a=0; a<strlen(buf); ++a) {
1363                                                 if ( (a!=(c-1)) && (a!=(c+1))) {
1364                                                         putc(buf[a], stdout);
1365                                                 }
1366                                         }
1367                                         printf("\n\n");
1368                                         return ch;
1369                                 }
1370                         }
1371                 }
1372         }
1373 }