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