citadel/commands.c

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