citadel/commands.c

   1 /*
   2  * $Id$
   3  *
   4  * This file contains functions which implement parts of the
   5  * text-mode user interface.
   6  *
   7  */
   8
   9 #include "sysdep.h"
  10 #include <stdlib.h>
  11 #include <unistd.h>
  12 #include <stdio.h>
  13 #include <fcntl.h>
  14 #include <ctype.h>
  15 #include <string.h>
  16 #include <sys/types.h>
  17 #include <sys/time.h>
  18
  19 #ifdef HAVE_TERMIOS_H
  20 #include <termios.h>
  21 #else
  22 #include <sgtty.h>
  23 #endif
  24
  25 #ifdef HAVE_SYS_SELECT_H
  26 #include <sys/select.h>
  27 #endif
  28
  29 #ifdef THREADED_CLIENT
  30 #include <pthread.h>
  31 #endif
  32
  33 #include <signal.h>
  34 #include <errno.h>
  35 #include <stdarg.h>
  36 #include "citadel.h"
  37 #include "commands.h"
  38 #include "messages.h"
  39 #include "citadel_decls.h"
  40 #include "routines.h"
  41 #include "routines2.h"
  42 #include "tools.h"
  43 #include "rooms.h"
  44 #ifndef HAVE_SNPRINTF
  45 #include "snprintf.h"
  46 #endif
  47
  48 struct citcmd {
  49         struct citcmd *next;
  50         int c_cmdnum;
  51         int c_axlevel;
  52         char c_keys[5][64];
  53 };
  54
  55 #define IFNEXPERT if ((userflags&US_EXPERT)==0)
  56
  57
  58 int rc_exp_beep;
  59 char rc_exp_cmd[256];
  60 int rc_allow_attachments;
  61 int rc_display_message_numbers;
  62 int rc_force_mail_prompts;
  63 int rc_remember_passwords;
  64 int rc_ansi_color;
  65 int num_urls = 0;
  66 char urls[MAXURLS][256];
  67 char rc_url_cmd[256];
  68
  69 char *gl_string;
  70 int next_lazy_cmd = 5;
  71
  72 int lines_printed = 0;          /* line count for paginator */
  73 extern int screenwidth, screenheight;
  74
  75 struct citcmd *cmdlist = NULL;
  76
  77
  78 /* these variables are local to this module */
  79 char keepalives_enabled = KA_YES;       /* send NOOPs to server when idle */
  80 int ok_to_interrupt = 0;                /* print express msgs asynchronously */
  81 time_t AnsiDetect;                      /* when did we send the detect code? */
  82 int enable_color = 0;                   /* nonzero for ANSI color */
  83
  84
  85
  86
  87 /*
  88  * If an interesting key has been pressed, return its value, otherwise 0
  89  */
  90 char was_a_key_pressed(void) {
  91         fd_set rfds;
  92         struct timeval tv;
  93         int the_character;
  94         int retval;
  95
  96         FD_ZERO(&rfds);
  97         FD_SET(0, &rfds);
  98         tv.tv_sec = 0;
  99         tv.tv_usec = 0;
 100         retval = select(1, &rfds, NULL, NULL, &tv);
 101
 102         /* Careful!  Disable keepalives during keyboard polling; we're probably
 103          * in the middle of a data transfer from the server, in which case
 104          * sending a NOOP would throw the client protocol out of sync.
 105          */
 106         if (FD_ISSET(0, &rfds)) {
 107                 set_keepalives(KA_NO);
 108                 the_character = inkey();
 109                 set_keepalives(KA_YES);
 110         }
 111         else {
 112                 the_character = 0;
 113         }
 114         return(the_character);
 115 }
 116
 117
 118
 119
 120
 121 /*
 122  * Check to see if we need to pause at the end of a screen.
 123  * If we do, we have to disable server keepalives during the pause because
 124  * we are probably in the middle of a server operation and the NOOP command
 125  * would confuse everything.
 126  */
 127 int checkpagin(int lp, int pagin, int height)
 128 {
 129         int thekey;
 130
 131         if (sigcaught) return(lp);
 132         thekey = was_a_key_pressed();
 133         if ( (thekey == NEXT_KEY) || (thekey == STOP_KEY)) sigcaught = thekey;
 134         if (sigcaught) return(lp);
 135
 136         if (!pagin) return(0);
 137         if (lp>=(height-1)) {
 138                 set_keepalives(KA_NO);
 139                 hit_any_key();
 140                 set_keepalives(KA_YES);
 141                 return(0);
 142         }
 143         return(lp);
 144 }
 145
 146
 147
 148
 149 /*
 150  * pprintf()  ...   paginated version of printf()
 151  */
 152 void pprintf(const char *format, ...) {
 153         va_list arg_ptr;
 154         static char buf[4096];  /* static for performance, change if needed */
 155         int i;
 156
 157         /* If sigcaught is nonzero, a keypress has interrupted this and we
 158          * should just drain output.
 159          */
 160         if (sigcaught) return;
 161
 162         /* Otherwise, start spewing... */
 163         va_start(arg_ptr, format);
 164         vsprintf(buf, format, arg_ptr);
 165         va_end(arg_ptr);
 166
 167         for (i=0; i<strlen(buf); ++i) {
 168                 putc(buf[i], stdout);
 169                 if (buf[i]==10) {
 170                         ++lines_printed;
 171                         lines_printed = checkpagin(lines_printed,
 172                                 (userflags & US_PAGINATOR),
 173                                 screenheight);
 174                 }
 175         }
 176 }
 177
 178
 179
 180 /*
 181  * print_express()  -  print express messages if there are any
 182  */
 183 void print_express(void)
 184 {
 185         char buf[256];
 186         FILE *outpipe;
 187
 188         if (express_msgs == 0)
 189                 return;
 190         express_msgs = 0;
 191         serv_puts("PEXP");
 192         serv_gets(buf);
 193         if (buf[0] != '1')
 194                 return;
 195
 196         if (strlen(rc_exp_cmd) > 0) {
 197                 outpipe = popen(rc_exp_cmd, "w");
 198                 if (outpipe != NULL) {
 199                         while (serv_gets(buf), strcmp(buf, "000")) {
 200                                 fprintf(outpipe, "%s\n", buf);
 201                         }
 202                         pclose(outpipe);
 203                         return;
 204                 }
 205         }
 206         /* fall back to built-in express message display */
 207         if (rc_exp_beep) {
 208                 putc(7, stdout);
 209         }
 210         color(BRIGHT_RED);
 211         printf("\r---\n");
 212         while (serv_gets(buf), strcmp(buf, "000")) {
 213                 printf("%s\n", buf);
 214         }
 215         printf("---\n");
 216         color(BRIGHT_WHITE);
 217 }
 218
 219
 220 void set_keepalives(int s)
 221 {
 222         keepalives_enabled = (char) s;
 223 }
 224
 225 /*
 226  * This loop handles the "keepalive" messages sent to the server when idling.
 227  */
 228
 229 static time_t idlet = 0;
 230 static void really_do_keepalive(void) {
 231         char buf[256];
 232
 233         time(&idlet);
 234         if (keepalives_enabled == KA_YES) {
 235                 serv_puts("NOOP");
 236                 serv_gets(buf);
 237                 if (buf[3] == '*') {
 238                         express_msgs = 1;
 239                         if (ok_to_interrupt == 1) {
 240                                 printf("\r%64s\r", "");
 241                                 print_express();
 242                                 printf("%s%c ", room_name,
 243                                        room_prompt(room_flags));
 244                                 fflush(stdout);
 245                         }
 246                 }
 247         }
 248 }
 249
 250 /* threaded nonblocking keepalive stuff starts here. I'm going for a simple
 251    encapsulated interface; in theory there should be no need to touch these
 252    globals outside of the async_ka_* functions. */
 253
 254 #ifdef THREADED_CLIENT
 255 static pthread_t ka_thr_handle;
 256 static int ka_thr_active = 0;
 257 static int async_ka_enabled = 0;
 258
 259 static void *ka_thread(void *arg)
 260 {
 261         really_do_keepalive();
 262         pthread_detach(ka_thr_handle);
 263         ka_thr_active = 0;
 264         return NULL;
 265 }
 266
 267 /* start up a thread to handle a keepalive in the background */
 268 static void async_ka_exec(void)
 269 {
 270         if (!ka_thr_active) {
 271                 ka_thr_active = 1;
 272                 if (pthread_create(&ka_thr_handle, NULL, ka_thread, NULL)) {
 273                         perror("pthread_create");
 274                         exit(1);
 275                 }
 276         }
 277 }
 278 #endif /* THREADED_CLIENT */
 279
 280 static void do_keepalive(void)
 281 {
 282         time_t now;
 283
 284         time(&now);
 285         if ((now - idlet) < ((long) S_KEEPALIVE))
 286                 return;
 287
 288         /* Do a space-backspace to keep telnet sessions from idling out */
 289         printf(" %c", 8);
 290         fflush(stdout);
 291
 292 #ifdef THREADED_CLIENT
 293         if (async_ka_enabled)
 294                 async_ka_exec();
 295         else
 296 #endif
 297                 really_do_keepalive();
 298 }
 299
 300
 301 /* Now the actual async-keepalve API that we expose to higher levels:
 302    async_ka_start() and async_ka_end(). These do nothing when we don't have
 303    threading enabled, so we avoid sprinkling ifdef's throughout the code. */
 304
 305 /* wait for a background keepalive to complete. this must be done before
 306    attempting any further server requests! */
 307 void async_ka_end(void)
 308 {
 309 #ifdef THREADED_CLIENT
 310         if (ka_thr_active)
 311                 pthread_join(ka_thr_handle, NULL);
 312
 313         async_ka_enabled--;
 314 #endif
 315 }
 316
 317 /* tell do_keepalive() that keepalives are asynchronous. */
 318 void async_ka_start(void)
 319 {
 320 #ifdef THREADED_CLIENT
 321         async_ka_enabled++;
 322 #endif
 323 }
 324
 325
 326 int inkey(void)
 327 {                               /* get a character from the keyboard, with   */
 328         int a;                  /* the watchdog timer in effect if necessary */
 329         fd_set rfds;
 330         struct timeval tv;
 331         time_t start_time, now;
 332         char inbuf[2];
 333
 334         fflush(stdout);
 335         lines_printed = 0;
 336         time(&start_time);
 337
 338         do {
 339
 340                 /* This loop waits for keyboard input.  If the keepalive
 341                  * timer expires, it sends a keepalive to the server if
 342                  * necessary and then waits again.
 343                  */
 344                 do {
 345                         do_keepalive();
 346
 347                         FD_ZERO(&rfds);
 348                         FD_SET(0, &rfds);
 349                         tv.tv_sec = S_KEEPALIVE;
 350                         tv.tv_usec = 0;
 351
 352                         time(&now);
 353                         if (((now - start_time) > SLEEPING)
 354                             && (SLEEPING != 0) && (getppid() == 1)) {
 355                                 printf("Sleeping? Call again.\n");
 356                                 logoff(SIGALRM);
 357                         }
 358                         select(1, &rfds, NULL, NULL, &tv);
 359                 } while (!FD_ISSET(0, &rfds));
 360
 361
 362
 363
 364                 /* At this point, there's input, so fetch it.
 365                  * (There's a hole in the bucket...)
 366                  */
 367                 read(0, inbuf, 1);
 368                 a = inbuf[0];
 369                 if (a == 127)
 370                         a = 8;
 371                 if (a > 126)
 372                         a = 0;
 373                 if (a == 10)
 374                         a = 13;
 375                 if (((a != 4) && (a != 13) && (a != 8) && (a != NEXT_KEY) && (a != STOP_KEY))
 376                     && ((a < 32) || (a > 126)))
 377                         a = 0;
 378         } while (a == 0);
 379         return (a);
 380 }
 381
 382
 383 int yesno(void)
 384 {                               /* Returns 1 for yes, 0 for no */
 385         int a;
 386         while (1) {
 387                 a = inkey();
 388                 a = tolower(a);
 389                 if (a == 'y') {
 390                         printf("Yes\n");
 391                         return (1);
 392                 }
 393                 if (a == 'n') {
 394                         printf("No\n");
 395                         return (0);
 396                 }
 397         }
 398 }
 399
 400 /* Returns 1 for yes, 0 for no, arg is default value */
 401 int yesno_d(int d)
 402 {
 403         int a;
 404         while (1) {
 405                 a = inkey();
 406                 a = tolower(a);
 407                 if (a == 13)
 408                         a = (d ? 'y' : 'n');
 409                 if (a == 'y') {
 410                         printf("Yes\n");
 411                         return (1);
 412                 }
 413                 if (a == 'n') {
 414                         printf("No\n");
 415                         return (0);
 416                 }
 417         }
 418 }
 419
 420
 421
 422
 423 /* Gets a line from the terminal */
 424 /* string == Pointer to string buffer */
 425 /* lim == Maximum length - if negative, no-show */
 426 void getline(char *string, int lim)
 427 {
 428         int a, b;
 429         char flag = 0;
 430
 431         if (lim < 0) {
 432                 lim = (0 - lim);
 433                 flag = 1;
 434         }
 435         strcpy(string, "");
 436         gl_string = string;
 437         async_ka_start();
 438       GLA:a = inkey();
 439         a = (a & 127);
 440         if ((a == 8) && (strlen(string) == 0))
 441                 goto GLA;
 442         if ((a != 13) && (a != 8) && (strlen(string) == lim))
 443                 goto GLA;
 444         if ((a == 8) && (string[0] != 0)) {
 445                 string[strlen(string) - 1] = 0;
 446                 putc(8, stdout);
 447                 putc(32, stdout);
 448                 putc(8, stdout);
 449                 goto GLA;
 450         }
 451         if ((a == 13) || (a == 10)) {
 452                 putc(13, stdout);
 453                 putc(10, stdout);
 454                 async_ka_end();
 455                 return;
 456         }
 457         if (a < 32)
 458                 a = '.';
 459         b = strlen(string);
 460         string[b] = a;
 461         string[b + 1] = 0;
 462         if (flag == 0)
 463                 putc(a, stdout);
 464         if (flag == 1)
 465                 putc('*', stdout);
 466         goto GLA;
 467 }
 468
 469
 470 /*
 471  * strprompt()  -  prompt for a string, print the existing value and
 472  *                 allow the user to press return to keep it...
 473  */
 474 void strprompt(char *prompt, char *str, int len)
 475 {
 476         char buf[128];
 477         print_express();
 478         color(DIM_WHITE);
 479         printf("%s ", prompt);
 480         color(DIM_MAGENTA);
 481         printf("[");
 482         color(BRIGHT_MAGENTA);
 483         printf("%s", str);
 484         color(DIM_MAGENTA);
 485         printf("]");
 486         color(DIM_WHITE);
 487         printf(": ");
 488         color(BRIGHT_CYAN);
 489         getline(buf, len);
 490         if (buf[0] != 0)
 491                 strcpy(str, buf);
 492         color(DIM_WHITE);
 493 }
 494
 495 /*
 496  * boolprompt()  -  prompt for a yes/no, print the existing value and
 497  *                  allow the user to press return to keep it...
 498  */
 499 int boolprompt(char *prompt, int prev_val)
 500 {
 501         int r;
 502
 503         color(DIM_WHITE);
 504         printf("%s ", prompt);
 505         color(DIM_MAGENTA);
 506         printf(" [");
 507         color(BRIGHT_MAGENTA);
 508         printf("%s", (prev_val ? "Yes" : "No"));
 509         color(DIM_MAGENTA);
 510         printf("]: ");
 511         color(BRIGHT_CYAN);
 512         r = (yesno_d(prev_val));
 513         color(DIM_WHITE);
 514         return r;
 515 }
 516
 517 /*
 518  * intprompt()  -  like strprompt(), except for an integer
 519  *                 (note that it RETURNS the new value!)
 520  */
 521 int intprompt(char *prompt, int ival, int imin, int imax)
 522 {
 523         char buf[16];
 524         int i;
 525         int p;
 526
 527         do {
 528                 i = ival;
 529                 snprintf(buf, sizeof buf, "%d", i);
 530                 strprompt(prompt, buf, 15);
 531                 i = atoi(buf);
 532                 for (p=0; p<strlen(buf); ++p) {
 533                         if ( (!isdigit(buf[p]))
 534                            && ( (buf[p]!='-') || (p!=0) )  )
 535                                 i = imin - 1;
 536                 }
 537                 if (i < imin)
 538                         printf("*** Must be no less than %d.\n", imin);
 539                 if (i > imax)
 540                         printf("*** Must be no more than %d.\n", imax);
 541         } while ((i < imin) || (i > imax));
 542         return (i);
 543 }
 544
 545 /*
 546  * newprompt()  -  prompt for a string with no existing value
 547  *                 (clears out string buffer first)
 548  */
 549 void newprompt(char *prompt, char *str, int len)
 550 {
 551         color(BRIGHT_MAGENTA);
 552         printf("%s", prompt);
 553         color(DIM_MAGENTA);
 554         getline(str, len);
 555         color(DIM_WHITE);
 556 }
 557
 558
 559 int lkey(void)
 560 {                               /* returns a lower case value */
 561         int a;
 562         a = inkey();
 563         if (isupper(a))
 564                 a = tolower(a);
 565         return (a);
 566 }
 567
 568 /*
 569  * parse the citadel.rc file
 570  */
 571 void load_command_set(void)
 572 {
 573         FILE *ccfile;
 574         char buf[256];
 575         struct citcmd *cptr;
 576         struct citcmd *lastcmd = NULL;
 577         int a, d;
 578         int b = 0;
 579
 580
 581         /* first, set up some defaults for non-required variables */
 582
 583         strcpy(editor_path, "");
 584         strcpy(printcmd, "");
 585         strcpy(rc_username, "");
 586         strcpy(rc_password, "");
 587         rc_floor_mode = 0;
 588         rc_exp_beep = 1;
 589         rc_allow_attachments = 0;
 590         rc_remember_passwords = 0;
 591         strcpy(rc_exp_cmd, "");
 592         rc_display_message_numbers = 0;
 593         rc_force_mail_prompts = 0;
 594         rc_ansi_color = 0;
 595         strcpy(rc_url_cmd, "");
 596
 597         /* now try to open the citadel.rc file */
 598
 599         ccfile = NULL;
 600         if (getenv("HOME") != NULL) {
 601                 snprintf(buf, sizeof buf, "%s/.citadelrc", getenv("HOME"));
 602                 ccfile = fopen(buf, "r");
 603         }
 604         if (ccfile == NULL) {
 605                 ccfile = fopen("/usr/local/lib/citadel.rc", "r");
 606         }
 607         if (ccfile == NULL) {
 608                 snprintf(buf, sizeof buf, "%s/citadel.rc", BBSDIR);
 609                 ccfile = fopen(buf, "r");
 610         }
 611         if (ccfile == NULL) {
 612                 ccfile = fopen("./citadel.rc", "r");
 613         }
 614         if (ccfile == NULL) {
 615                 perror("commands: cannot open citadel.rc");
 616                 logoff(errno);
 617         }
 618         while (fgets(buf, 256, ccfile) != NULL) {
 619                 while ((strlen(buf) > 0) ? (isspace(buf[strlen(buf) - 1])) : 0)
 620                         buf[strlen(buf) - 1] = 0;
 621
 622                 if (!strncasecmp(buf, "editor=", 7))
 623                         strcpy(editor_path, &buf[7]);
 624
 625                 if (!strncasecmp(buf, "printcmd=", 9))
 626                         strcpy(printcmd, &buf[9]);
 627
 628                 if (!strncasecmp(buf, "expcmd=", 7))
 629                         strcpy(rc_exp_cmd, &buf[7]);
 630
 631                 if (!strncasecmp(buf, "local_screen_dimensions=", 24))
 632                         have_xterm = (char) atoi(&buf[24]);
 633
 634                 if (!strncasecmp(buf, "use_floors=", 11)) {
 635                         if (!strcasecmp(&buf[11], "yes"))
 636                                 rc_floor_mode = RC_YES;
 637                         if (!strcasecmp(&buf[11], "no"))
 638                                 rc_floor_mode = RC_NO;
 639                         if (!strcasecmp(&buf[11], "default"))
 640                                 rc_floor_mode = RC_DEFAULT;
 641                 }
 642                 if (!strncasecmp(buf, "beep=", 5)) {
 643                         rc_exp_beep = atoi(&buf[5]);
 644                 }
 645                 if (!strncasecmp(buf, "allow_attachments=", 18)) {
 646                         rc_allow_attachments = atoi(&buf[18]);
 647                 }
 648                 if (!strncasecmp(buf, "remember_passwords=", 19)) {
 649                         rc_remember_passwords = atoi(&buf[19]);
 650                 }
 651                 if (!strncasecmp(buf, "display_message_numbers=", 24)) {
 652                         rc_display_message_numbers = atoi(&buf[24]);
 653                 }
 654                 if (!strncasecmp(buf, "force_mail_prompts=", 19)) {
 655                         rc_force_mail_prompts = atoi(&buf[19]);
 656                 }
 657                 if (!strncasecmp(buf, "ansi_color=", 11)) {
 658                         if (!strncasecmp(&buf[11], "on", 2))
 659                                 rc_ansi_color = 1;
 660                         if (!strncasecmp(&buf[11], "auto", 4))
 661                                 rc_ansi_color = 2;      /* autodetect */
 662                         if (!strncasecmp(&buf[11], "user", 4))
 663                                 rc_ansi_color = 3;      /* user config */
 664                 }
 665                 if (!strncasecmp(buf, "username=", 9))
 666                         strcpy(rc_username, &buf[9]);
 667
 668                 if (!strncasecmp(buf, "password=", 9))
 669                         strcpy(rc_password, &buf[9]);
 670
 671                 if (!strncasecmp(buf, "urlcmd=", 7))
 672                         strcpy(rc_url_cmd, &buf[7]);
 673
 674                 if (!strncasecmp(buf, "cmd=", 4)) {
 675                         strcpy(buf, &buf[4]);
 676
 677                         cptr = (struct citcmd *) malloc(sizeof(struct citcmd));
 678
 679                         cptr->c_cmdnum = atoi(buf);
 680                         for (d = strlen(buf); d >= 0; --d)
 681                                 if (buf[d] == ',')
 682                                         b = d;
 683                         strcpy(buf, &buf[b + 1]);
 684
 685                         cptr->c_axlevel = atoi(buf);
 686                         for (d = strlen(buf); d >= 0; --d)
 687                                 if (buf[d] == ',')
 688                                         b = d;
 689                         strcpy(buf, &buf[b + 1]);
 690
 691                         for (a = 0; a < 5; ++a)
 692                                 cptr->c_keys[a][0] = 0;
 693
 694                         a = 0;
 695                         b = 0;
 696                         buf[strlen(buf) + 1] = 0;
 697                         while (strlen(buf) > 0) {
 698                                 b = strlen(buf);
 699                                 for (d = strlen(buf); d >= 0; --d)
 700                                         if (buf[d] == ',')
 701                                                 b = d;
 702                                 strncpy(cptr->c_keys[a], buf, b);
 703                                 cptr->c_keys[a][b] = 0;
 704                                 if (buf[b] == ',')
 705                                         strcpy(buf, &buf[b + 1]);
 706                                 else
 707                                         strcpy(buf, "");
 708                                 ++a;
 709                         }
 710
 711                         cptr->next = NULL;
 712                         if (cmdlist == NULL)
 713                                 cmdlist = cptr;
 714                         else
 715                                 lastcmd->next = cptr;
 716                         lastcmd = cptr;
 717                 }
 718         }
 719         fclose(ccfile);
 720 }
 721
 722
 723
 724 /*
 725  * return the key associated with a command
 726  */
 727 char keycmd(char *cmdstr)
 728 {
 729         int a;
 730
 731         for (a = 0; a < strlen(cmdstr); ++a)
 732                 if (cmdstr[a] == '&')
 733                         return (tolower(cmdstr[a + 1]));
 734         return (0);
 735 }
 736
 737
 738 /*
 739  * Output the string from a key command without the ampersand
 740  * "mode" should be set to 0 for normal or 1 for <C>ommand key highlighting
 741  */
 742 char *cmd_expand(char *strbuf, int mode)
 743 {
 744         int a;
 745         static char exp[64];
 746         char buf[256];
 747
 748         strcpy(exp, strbuf);
 749
 750         for (a = 0; a < strlen(exp); ++a) {
 751                 if (strbuf[a] == '&') {
 752
 753                         if (mode == 0) {
 754                                 strcpy(&exp[a], &exp[a + 1]);
 755                         }
 756                         if (mode == 1) {
 757                                 exp[a] = '<';
 758                                 strcpy(buf, &exp[a + 2]);
 759                                 exp[a + 2] = '>';
 760                                 exp[a + 3] = 0;
 761                                 strcat(exp, buf);
 762                         }
 763                 }
 764                 if (!strncmp(&exp[a], "^r", 2)) {
 765                         strcpy(buf, exp);
 766                         strcpy(&exp[a], room_name);
 767                         strcat(exp, &buf[a + 2]);
 768                 }
 769                 if (!strncmp(&exp[a], "^c", 2)) {
 770                         exp[a] = ',';
 771                         strcpy(&exp[a + 1], &exp[a + 2]);
 772                 }
 773         }
 774
 775         return (exp);
 776 }
 777
 778
 779
 780 /*
 781  * Comparison function to determine if entered commands match a
 782  * command loaded from the config file.
 783  */
 784 int cmdmatch(char *cmdbuf, struct citcmd *cptr, int ncomp)
 785 {
 786         int a;
 787         int cmdax;
 788
 789         cmdax = 0;
 790         if (is_room_aide)
 791                 cmdax = 1;
 792         if (axlevel >= 6)
 793                 cmdax = 2;
 794
 795         for (a = 0; a < ncomp; ++a) {
 796                 if ((tolower(cmdbuf[a]) != keycmd(cptr->c_keys[a]))
 797                     || (cptr->c_axlevel > cmdax))
 798                         return (0);
 799         }
 800         return (1);
 801 }
 802
 803
 804 /*
 805  * This function returns 1 if a given command requires a string input
 806  */
 807 int requires_string(struct citcmd *cptr, int ncomp)
 808 {
 809         int a;
 810         char buf[64];
 811
 812         strcpy(buf, cptr->c_keys[ncomp - 1]);
 813         for (a = 0; a < strlen(buf); ++a) {
 814                 if (buf[a] == ':')
 815                         return (1);
 816         }
 817         return (0);
 818 }
 819
 820
 821 /*
 822  * Input a command at the main prompt.
 823  * This function returns an integer command number.  If the command prompts
 824  * for a string then it is placed in the supplied buffer.
 825  */
 826 int getcmd(char *argbuf)
 827 {
 828         char cmdbuf[5];
 829         int cmdspaces[5];
 830         int cmdpos;
 831         int ch;
 832         int a;
 833         int got;
 834         int this_lazy_cmd;
 835         struct citcmd *cptr;
 836
 837         /*
 838          * Starting a new command now, so set sigcaught to 0.  This variable
 839          * is set to nonzero (usually NEXT_KEY or STOP_KEY) if a command has
 840          * been interrupted by a keypress.
 841          */
 842         sigcaught = 0;
 843
 844         /* Switch color support on or off if we're in user mode */
 845         if (rc_ansi_color == 3) {
 846                 if (userflags & US_COLOR)
 847                         enable_color = 1;
 848                 else
 849                         enable_color = 0;
 850         }
 851         /* if we're running in idiot mode, display a cute little menu */
 852         IFNEXPERT formout("mainmenu");
 853
 854         print_express();        /* print express messages if there are any */
 855         strcpy(argbuf, "");
 856         cmdpos = 0;
 857         for (a = 0; a < 5; ++a)
 858                 cmdbuf[a] = 0;
 859         /* now the room prompt... */
 860         ok_to_interrupt = 1;
 861         color(BRIGHT_WHITE);
 862         printf("\n%s", room_name);
 863         color(DIM_WHITE);
 864         printf("%c ", room_prompt(room_flags));
 865         fflush(stdout);
 866
 867         while (1) {
 868                 ch = inkey();
 869                 ok_to_interrupt = 0;
 870
 871                 /* Handle the backspace key, but only if there's something
 872                  * to backspace over...
 873                  */
 874                 if ((ch == 8) && (cmdpos > 0)) {
 875                         back(cmdspaces[cmdpos - 1] + 1);
 876                         cmdbuf[cmdpos] = 0;
 877                         --cmdpos;
 878                 }
 879                 /* Spacebar invokes "lazy traversal" commands */
 880                 if ((ch == 32) && (cmdpos == 0)) {
 881                         this_lazy_cmd = next_lazy_cmd;
 882                         if (this_lazy_cmd == 13)
 883                                 next_lazy_cmd = 5;
 884                         if (this_lazy_cmd == 5)
 885                                 next_lazy_cmd = 13;
 886                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 887                                 if (cptr->c_cmdnum == this_lazy_cmd) {
 888                                         for (a = 0; a < 5; ++a)
 889                                                 if (cptr->c_keys[a][0] != 0)
 890                                                         printf("%s ", cmd_expand(
 891                                                                                         cptr->c_keys[a], 0));
 892                                         printf("\n");
 893                                         return (this_lazy_cmd);
 894                                 }
 895                         }
 896                         printf("\n");
 897                         return (this_lazy_cmd);
 898                 }
 899                 /* Otherwise, process the command */
 900                 cmdbuf[cmdpos] = tolower(ch);
 901
 902                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 903                         if (cmdmatch(cmdbuf, cptr, cmdpos + 1)) {
 904
 905                                 printf("%s", cmd_expand(cptr->c_keys[cmdpos], 0));
 906                                 cmdspaces[cmdpos] = strlen(
 907                                     cmd_expand(cptr->c_keys[cmdpos], 0));
 908                                 if (cmdpos < 4)
 909                                         if ((cptr->c_keys[cmdpos + 1]) != 0)
 910                                                 putc(' ', stdout);
 911                                 ++cmdpos;
 912                         }
 913                 }
 914
 915                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 916                         if (cmdmatch(cmdbuf, cptr, 5)) {
 917                                 /* We've found our command. */
 918                                 if (requires_string(cptr, cmdpos)) {
 919                                         getline(argbuf, 32);
 920                                 } else {
 921                                         printf("\n");
 922                                 }
 923
 924                                 /* If this command is one that changes rooms,
 925                                  * then the next lazy-command (space bar)
 926                                  * should be "read new" instead of "goto"
 927                                  */
 928                                 if ((cptr->c_cmdnum == 5)
 929                                     || (cptr->c_cmdnum == 6)
 930                                     || (cptr->c_cmdnum == 47)
 931                                     || (cptr->c_cmdnum == 52)
 932                                     || (cptr->c_cmdnum == 16)
 933                                     || (cptr->c_cmdnum == 20))
 934                                         next_lazy_cmd = 13;
 935
 936                                 return (cptr->c_cmdnum);
 937
 938                         }
 939                 }
 940
 941                 if (ch == '?') {
 942                         printf("\rOne of ...                         \n");
 943                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 944                                 if (cmdmatch(cmdbuf, cptr, cmdpos)) {
 945                                         for (a = 0; a < 5; ++a) {
 946                                                 printf("%s ", cmd_expand(cptr->c_keys[a], 1));
 947                                         }
 948                                         printf("\n");
 949                                 }
 950                         }
 951
 952                         printf("\n%s%c ", room_name, room_prompt(room_flags));
 953                         got = 0;
 954                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 955                                 if ((got == 0) && (cmdmatch(cmdbuf, cptr, cmdpos))) {
 956                                         for (a = 0; a < cmdpos; ++a) {
 957                                                 printf("%s ",
 958                                                        cmd_expand(cptr->c_keys[a], 0));
 959                                         }
 960                                         got = 1;
 961                                 }
 962                         }
 963                 }
 964         }
 965
 966 }
 967
 968
 969
 970
 971
 972 /*
 973  * set tty modes.  commands are:
 974  *
 975  * 01- set to bbs mode
 976  * 2 - save current settings for later restoral
 977  * 3 - restore saved settings
 978  */
 979 #ifdef HAVE_TERMIOS_H
 980 void sttybbs(int cmd)
 981 {                               /* SysV version of sttybbs() */
 982         struct termios live;
 983         static struct termios saved_settings;
 984         static int last_cmd = 0;
 985
 986         if (cmd == SB_LAST)
 987                 cmd = last_cmd;
 988         else
 989                 last_cmd = cmd;
 990
 991         if ((cmd == 0) || (cmd == 1)) {
 992                 tcgetattr(0, &live);
 993                 live.c_iflag = ISTRIP | IXON | IXANY;
 994                 live.c_oflag = OPOST | ONLCR;
 995                 live.c_lflag = ISIG | NOFLSH;
 996
 997                 live.c_cc[VINTR] = (-1);
 998                 live.c_cc[VQUIT] = (-1);
 999
1000                 /* do we even need this stuff anymore? */
1001                 /* live.c_line=0; */
1002                 live.c_cc[VERASE] = 8;
1003                 live.c_cc[VKILL] = 24;
1004                 live.c_cc[VEOF] = 1;
1005                 live.c_cc[VEOL] = 255;
1006                 live.c_cc[VEOL2] = 0;
1007                 live.c_cc[VSTART] = 0;
1008                 tcsetattr(0, TCSADRAIN, &live);
1009         }
1010         if (cmd == 2) {
1011                 tcgetattr(0, &saved_settings);
1012         }
1013         if (cmd == 3) {
1014                 tcsetattr(0, TCSADRAIN, &saved_settings);
1015         }
1016 }
1017 #else
1018 void sttybbs(int cmd)
1019 {                               /* BSD version of sttybbs() */
1020         struct sgttyb live;
1021         static struct sgttyb saved_settings;
1022
1023         if ((cmd == 0) || (cmd == 1)) {
1024                 gtty(0, &live);
1025                 live.sg_flags |= CBREAK;
1026                 live.sg_flags |= CRMOD;
1027                 live.sg_flags |= NL1;
1028                 live.sg_flags &= ~ECHO;
1029                 if (cmd == 1)
1030                         live.sg_flags |= NOFLSH;
1031                 stty(0, &live);
1032         }
1033         if (cmd == 2) {
1034                 gtty(0, &saved_settings);
1035         }
1036         if (cmd == 3) {
1037                 stty(0, &saved_settings);
1038         }
1039 }
1040 #endif
1041
1042
1043 /*
1044  * display_help()  -  help file viewer
1045  */
1046 void display_help(char *name)
1047 {
1048         formout(name);
1049 }
1050
1051
1052 /*
1053  * fmout()  -  Citadel text formatter and paginator
1054  */
1055 int fmout(
1056         int width,      /* screen width to use */
1057         FILE *fp,       /* file to read from, or NULL to read from server */
1058         char pagin,     /* nonzero if we should use the paginator */
1059         int height,     /* screen height to use */
1060         int starting_lp,/* starting value for lines_printed, -1 for global */
1061         char subst)     /* nonzero if we should use hypertext mode */
1062 {
1063         int a, b, c, d, old;
1064         int real = (-1);
1065         char aaa[140];
1066         char buffer[512];
1067         int eof_flag = 0;
1068
1069         num_urls = 0;   /* Start with a clean slate of embedded URL's */
1070
1071         if (starting_lp >= 0) {
1072                 lines_printed = starting_lp;
1073         }
1074         strcpy(aaa, "");
1075         old = 255;
1076         strcpy(buffer, "");
1077         c = 1;                  /* c is the current pos */
1078
1079 FMTA:   while ((eof_flag == 0) && (strlen(buffer) < 126)) {
1080                 if (fp != NULL) {       /* read from file */
1081                         if (feof(fp))
1082                                 eof_flag = 1;
1083                         if (eof_flag == 0) {
1084                                 a = getc(fp);
1085                                 buffer[strlen(buffer) + 1] = 0;
1086                                 buffer[strlen(buffer)] = a;
1087                         }
1088                 } else {        /* read from server */
1089                         d = strlen(buffer);
1090                         serv_gets(&buffer[d]);
1091                         while ((!isspace(buffer[d])) && (isspace(buffer[strlen(buffer) - 1])))
1092                                 buffer[strlen(buffer) - 1] = 0;
1093                         if (!strcmp(&buffer[d], "000")) {
1094                                 buffer[d] = 0;
1095                                 eof_flag = 1;
1096                                 while (isspace(buffer[strlen(buffer) - 1]))
1097                                         buffer[strlen(buffer) - 1] = 0;
1098                         }
1099                         d = strlen(buffer);
1100                         buffer[d] = 10;
1101                         buffer[d + 1] = 0;
1102                 }
1103         }
1104
1105         if ( (!strncasecmp(buffer, "http://", 7))
1106            || (!strncasecmp(buffer, "ftp://", 6)) ) {
1107                 safestrncpy(urls[num_urls], buffer, 255);
1108                 for (a=0; a<strlen(urls[num_urls]); ++a) {
1109                         b = urls[num_urls][a];
1110                         if ( (b==' ') || (b==')') || (b=='>') || (b==10)
1111                            || (b==13) || (b==9) || (b=='\"') )
1112                                 urls[num_urls][a] = 0;
1113                 }
1114                 ++num_urls;
1115         }
1116
1117         buffer[strlen(buffer) + 1] = 0;
1118         a = buffer[0];
1119         strcpy(buffer, &buffer[1]);
1120
1121         old = real;
1122         real = a;
1123         if (a <= 0)
1124                 goto FMTEND;
1125
1126         if (((a == 13) || (a == 10)) && (old != 13) && (old != 10))
1127                 a = 32;
1128         if (((old == 13) || (old == 10)) && (isspace(real))) {
1129                 printf("\n");
1130                 ++lines_printed;
1131                 lines_printed = checkpagin(lines_printed, pagin, height);
1132                 c = 1;
1133         }
1134         if (a > 126)
1135                 goto FMTA;
1136
1137         if (a > 32) {
1138                 if (((strlen(aaa) + c) > (width - 5)) && (strlen(aaa) > (width - 5))) {
1139                         printf("\n%s", aaa);
1140                         c = strlen(aaa);
1141                         aaa[0] = 0;
1142                         ++lines_printed;
1143                         lines_printed = checkpagin(lines_printed, pagin, height);
1144                 }
1145                 b = strlen(aaa);
1146                 aaa[b] = a;
1147                 aaa[b + 1] = 0;
1148         }
1149         if (a == 32) {
1150                 if ((strlen(aaa) + c) > (width - 5)) {
1151                         c = 1;
1152                         printf("\n");
1153                         ++lines_printed;
1154                         lines_printed = checkpagin(lines_printed, pagin, height);
1155                 }
1156                 printf("%s ", aaa);
1157                 ++c;
1158                 c = c + strlen(aaa);
1159                 strcpy(aaa, "");
1160                 goto FMTA;
1161         }
1162         if ((a == 13) || (a == 10)) {
1163                 printf("%s\n", aaa);
1164                 c = 1;
1165                 ++lines_printed;
1166                 lines_printed = checkpagin(lines_printed, pagin, height);
1167                 if (sigcaught) goto OOPS;
1168                 strcpy(aaa, "");
1169                 goto FMTA;
1170         }
1171         goto FMTA;
1172
1173         /* keypress caught; drain the server */
1174 OOPS:   do {
1175                 serv_gets(aaa);
1176         } while (strcmp(aaa, "000"));
1177
1178 FMTEND: printf("\n");
1179         ++lines_printed;
1180         lines_printed = checkpagin(lines_printed, pagin, height);
1181         return (sigcaught);
1182 }
1183
1184
1185 /*
1186  * support ANSI color if defined
1187  */
1188 void color(int colornum)
1189 {
1190         static int is_bold = 0;
1191         static int hold_color, current_color;
1192
1193         if (colornum == COLOR_PUSH) {
1194                 hold_color = current_color;
1195                 return;
1196         }
1197
1198         if (colornum == COLOR_POP) {
1199                 color(hold_color);
1200                 return;
1201         }
1202
1203         current_color = colornum;
1204         if (enable_color) {
1205                 /* When switching to dim white, actually output an 'original
1206                  * pair' sequence -- this looks better on black-on-white
1207                  * terminals.
1208                  */
1209                 if (colornum == DIM_WHITE)
1210                         printf("\033[39;49m");
1211                 else
1212                         printf("\033[3%d;40m", (colornum & 7));
1213
1214                 if ((colornum >= 8) && (is_bold == 0)) {
1215                         printf("\033[1m");
1216                         is_bold = 1;
1217                 } else if ((colornum < 8) && (is_bold == 1)) {
1218                         printf("\033[0m");
1219                         is_bold = 0;
1220                 }
1221                 fflush(stdout);
1222         }
1223 }
1224
1225 void cls(int colornum)
1226 {
1227         if (enable_color) {
1228                 printf("\033[4%dm\033[2J\033[H\033[0m", colornum);
1229                 fflush(stdout);
1230         }
1231 }
1232
1233
1234 /*
1235  * Detect whether ANSI color is available (answerback)
1236  */
1237 void send_ansi_detect(void)
1238 {
1239         if (rc_ansi_color == 2) {
1240                 printf("\033[c");
1241                 fflush(stdout);
1242                 time(&AnsiDetect);
1243         }
1244 }
1245
1246 void look_for_ansi(void)
1247 {
1248         fd_set rfds;
1249         struct timeval tv;
1250         char abuf[512];
1251         time_t now;
1252         int a;
1253
1254         if (rc_ansi_color == 0) {
1255                 enable_color = 0;
1256         } else if (rc_ansi_color == 1) {
1257                 enable_color = 1;
1258         } else if (rc_ansi_color == 2) {
1259
1260                 /* otherwise, do the auto-detect */
1261
1262                 strcpy(abuf, "");
1263
1264                 time(&now);
1265                 if ((now - AnsiDetect) < 2)
1266                         sleep(1);
1267
1268                 do {
1269                         FD_ZERO(&rfds);
1270                         FD_SET(0, &rfds);
1271                         tv.tv_sec = 0;
1272                         tv.tv_usec = 1;
1273
1274                         select(1, &rfds, NULL, NULL, &tv);
1275                         if (FD_ISSET(0, &rfds)) {
1276                                 abuf[strlen(abuf) + 1] = 0;
1277                                 read(0, &abuf[strlen(abuf)], 1);
1278                         }
1279                 } while (FD_ISSET(0, &rfds));
1280
1281                 for (a = 0; a < strlen(abuf); ++a) {
1282                         if ((abuf[a] == 27) && (abuf[a + 1] == '[')
1283                             && (abuf[a + 2] == '?')) {
1284                                 enable_color = 1;
1285                         }
1286                 }
1287         }
1288 }
1289
1290
1291 /*
1292  * Display key options (highlight hotkeys inside angle brackets)
1293  */
1294 void keyopt(char *buf) {
1295         int i;
1296
1297         color(DIM_WHITE);
1298         for (i=0; i<strlen(buf); ++i) {
1299                 if (buf[i]=='<') {
1300                         putc(buf[i], stdout);
1301                         color(BRIGHT_MAGENTA);
1302                 } else {
1303                         if (buf[i]=='>') {
1304                                 color(DIM_WHITE);
1305                         }
1306                         putc(buf[i], stdout);
1307                 }
1308         }
1309         color(DIM_WHITE);
1310 }
1311
1312
1313
1314 /*
1315  * Present a key-menu line choice type of thing
1316  */
1317 char keymenu(char *menuprompt, char *menustring) {
1318         int i, c, a;
1319         int choices;
1320         int do_prompt = 0;
1321         char buf[256];
1322         int ch;
1323         int display_prompt = 1;
1324
1325         choices = num_tokens(menustring, '|');
1326
1327         if (menuprompt != NULL) do_prompt = 1;
1328         if (menuprompt != NULL) if (strlen(menuprompt)==0) do_prompt = 0;
1329
1330         while (1) {
1331                 if (display_prompt) {
1332                         if (do_prompt) {
1333                                 printf("%s ", menuprompt);
1334                         }
1335                         else {
1336                                 for (i=0; i<choices; ++i) {
1337                                         extract(buf, menustring, i);
1338                                         keyopt(buf);
1339                                         printf(" ");
1340                                 }
1341                         }
1342                         printf(" -> ");
1343                         display_prompt = 0;
1344                 }
1345                 ch = lkey();
1346
1347                 if ( (do_prompt) && (ch=='?') ) {
1348                         printf("\rOne of...                               ");
1349                         printf("                                      \n");
1350                         for (i=0; i<choices; ++i) {
1351                                 extract(buf, menustring, i);
1352                                 printf("   ");
1353                                 keyopt(buf);
1354                                 printf("\n");
1355                         }
1356                         printf("\n");
1357                         display_prompt = 1;
1358                 }
1359
1360                 for (i=0; i<choices; ++i) {
1361                         extract(buf, menustring, i);
1362                         for (c=1; c<strlen(buf); ++c) {
1363                                 if ( (ch == tolower(buf[c]))
1364                                    && (buf[c-1]=='<')
1365                                    && (buf[c+1]=='>') ) {
1366                                         for (a=0; a<strlen(buf); ++a) {
1367                                                 if ( (a!=(c-1)) && (a!=(c+1))) {
1368                                                         putc(buf[a], stdout);
1369                                                 }
1370                                         }
1371                                         printf("\n\n");
1372                                         return ch;
1373                                 }
1374                         }
1375                 }
1376         }
1377 }