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