citadel/commands.c

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