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