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