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