citadel/commands.c

   1 /*
   2  * Citadel/UX
   3  *
   4  * commands.c - front end for Citadel
   5  *
   6  * This version is the traditional command parser for room prompts.
   7  *
   8  * $Id$
   9  *
  10  */
  11
  12 #include "sysdep.h"
  13 #include <stdlib.h>
  14 #include <unistd.h>
  15 #include <stdio.h>
  16 #include <fcntl.h>
  17 #include <ctype.h>
  18 #include <string.h>
  19 #include <sys/types.h>
  20 #include <sys/time.h>
  21
  22 #ifdef HAVE_TERMIOS_H
  23 #include <termios.h>
  24 #else
  25 #include <sgtty.h>
  26 #endif
  27
  28 #ifdef HAVE_SYS_SELECT_H
  29 #include <sys/select.h>
  30 #endif
  31
  32
  33 #include <signal.h>
  34 #include <errno.h>
  35 #include "citadel.h"
  36 #include "commands.h"
  37 #include "messages.h"
  38 #include "citadel_decls.h"
  39 #include "routines.h"
  40 #include "routines2.h"
  41
  42 struct citcmd {
  43         struct citcmd *next;
  44         int c_cmdnum;
  45         int c_axlevel;
  46         char c_keys[5][64];
  47         };
  48
  49 #define IFNEXPERT if ((userflags&US_EXPERT)==0)
  50
  51
  52 int rc_exp_beep;
  53 char rc_exp_cmd[256];
  54 int rc_allow_attachments;
  55 int rc_display_message_numbers;
  56 int rc_force_mail_prompts;
  57 int rc_ansi_color;
  58
  59 char *gl_string;
  60 int next_lazy_cmd = 5;
  61
  62 struct citcmd *cmdlist = NULL;
  63
  64
  65 /* these variables are local to this module */
  66 char keepalives_enabled = KA_YES;       /* send NOOPs to server when idle */
  67 int ok_to_interrupt = 0;                /* print express msgs asynchronously */
  68 time_t AnsiDetect;                      /* when did we send the detect code? */
  69 int enable_color = 0;                   /* nonzero for ANSI color */
  70
  71
  72 /*
  73  * print_express()  -  print express messages if there are any
  74  */
  75 void print_express(void) {
  76         char buf[256];
  77         FILE *outpipe;
  78
  79         if (express_msgs == 0) return;
  80         express_msgs = 0;
  81         serv_puts("PEXP");
  82         serv_gets(buf);
  83         if (buf[0]!='1') return;
  84
  85         if (strlen(rc_exp_cmd) > 0) {
  86                 outpipe = popen(rc_exp_cmd, "w");
  87                 if (outpipe != NULL) {
  88                         while (serv_gets(buf), strcmp(buf,"000")) {
  89                                 fprintf(outpipe, "%s\n", buf);
  90                                 }
  91                         pclose(outpipe);
  92                         return;
  93                         }
  94                 }
  95
  96         /* fall back to built-in express message display */
  97         if (rc_exp_beep) {
  98                 putc(7,stdout);
  99                 }
 100         color(1);
 101         printf("---\n");
 102         while (serv_gets(buf), strcmp(buf,"000")) {
 103                 printf("%s\n",buf);
 104                 }
 105         printf("---\n");
 106         color(7);
 107         }
 108
 109
 110 void set_keepalives(int s)
 111 {
 112         keepalives_enabled = (char)s;
 113         }
 114
 115 /*
 116  * This loop handles the "keepalive" messages sent to the server when idling.
 117  */
 118 void do_keepalive(void) {
 119         char buf[256];
 120         static time_t idlet = 0;
 121         time_t now;
 122
 123         time(&now);
 124         if ((now - idlet) < ((long)S_KEEPALIVE)) return;
 125         time(&idlet);
 126
 127         /* Do a space-backspace to keep socksified telnet sessions open */
 128         printf(" %c", 8);
 129         fflush(stdout);
 130
 131         if (keepalives_enabled != KA_NO) {
 132                 serv_puts("NOOP");
 133                 if (keepalives_enabled == KA_YES) {
 134                         serv_gets(buf);
 135                         if (buf[3]=='*') {
 136                                 express_msgs = 1;
 137                                 if (ok_to_interrupt == 1) {
 138                                         printf("\r%64s\r", "");
 139                                         print_express();
 140                                         printf("%s%c ",room_name,
 141                                                 room_prompt(room_flags));
 142                                         fflush(stdout);
 143                                         }
 144                                 }
 145                         }
 146                 }
 147         }
 148
 149
 150 int inkey(void) {               /* get a character from the keyboard, with   */
 151         int a;          /* the watchdog timer in effect if necessary */
 152         fd_set rfds;
 153         struct timeval tv;
 154         time_t start_time, now;
 155         char inbuf[2];
 156
 157         time(&start_time);
 158
 159         do {
 160
 161                 /* This loop waits for keyboard input.  If the keepalive
 162                  * timer expires, it sends a keepalive to the server if
 163                  * necessary and then waits again.
 164                  */
 165                 do {
 166                         do_keepalive();
 167                         fflush(stdout);
 168                         FD_ZERO(&rfds);
 169                         FD_SET(0,&rfds);
 170                         tv.tv_sec = S_KEEPALIVE;
 171                         tv.tv_usec = 0;
 172
 173                         time(&now);
 174                         if (((now-start_time) > SLEEPING)
 175                            && (SLEEPING != 0) && (getppid()==1)) {
 176                                 printf("Sleeping? Call again.\n");
 177                                 logoff(SIGALRM);
 178                                 }
 179
 180                         select(1, &rfds, NULL, NULL, &tv);
 181                         } while (!FD_ISSET(0, &rfds));
 182
 183
 184
 185
 186                 /* At this point, there's input, so fetch it.
 187                  * (There's a hole in the bucket...)
 188                  */
 189                 read(0, inbuf, 1);
 190                 a = inbuf[0];
 191                 if (a==127) a=8;
 192                 if (a>126) a=0;
 193                 if (a==10) a=13;
 194                 if (((a!=4)&&(a!=13)&&(a!=8)&&(a!=NEXT_KEY)&&(a!=STOP_KEY))
 195                         && ((a<32)||(a>126))) a=0;
 196                 } while(a==0);
 197         return(a);
 198         }
 199
 200
 201 int yesno(void) { /* Returns 1 for yes, 0 for no */
 202 int a;
 203         while (1) {
 204                 a=inkey(); a=tolower(a);
 205                 if (a=='y') { printf("Yes\n"); return(1); }
 206                 if (a=='n') { printf("No\n");  return(0); }
 207                 }
 208         }
 209
 210 int yesno_d(int d) /* Returns 1 for yes, 0 for no, arg is default value */
 211        {
 212 int a;
 213         while (1) {
 214                 a=inkey(); a=tolower(a);
 215                 if (a==13) a=(d ? 'y' : 'n');
 216                 if (a=='y') { printf("Yes\n"); return(1); }
 217                 if (a=='n') { printf("No\n");  return(0); }
 218                 }
 219         }
 220
 221
 222
 223
 224 void getline(char *string, int lim)     /* Gets a line from the terminal */
 225                         /* Pointer to string buffer */
 226                         /* Maximum length - if negative, no-show */
 227 {
 228         int a,b;
 229         char flag = 0;
 230
 231         if (lim<0) { lim=(0-lim); flag=1; }
 232         strcpy(string,"");
 233         gl_string = string;
 234 GLA:    a=inkey(); a=(a&127);
 235         if ((a==8)&&(strlen(string)==0)) goto GLA;
 236         if ((a!=13)&&(a!=8)&&(strlen(string)==lim)) goto GLA;
 237         if ((a==8)&&(string[0]!=0)) {
 238                 string[strlen(string)-1]=0;
 239                 putc(8,stdout); putc(32,stdout); putc(8,stdout); goto GLA; }
 240         if ((a==13)||(a==10)) {
 241                 putc(13,stdout);
 242                 putc(10,stdout);
 243                 return;
 244                 }
 245         if (a<32) a='.';
 246         b=strlen(string);
 247         string[b]=a;
 248         string[b+1]=0;
 249         if (flag==0) putc(a,stdout);
 250         if (flag==1) putc('*',stdout);
 251         goto GLA;
 252         }
 253
 254
 255 /*
 256  * strprompt()  -  prompt for a string, print the existing value and
 257  *                 allow the user to press return to keep it...
 258  */
 259 void strprompt(char *prompt, char *str, int len)
 260 {
 261         char buf[128];
 262         print_express();
 263         color(3);
 264         printf("%s [", prompt);
 265         color(1);
 266         printf("%s", str);
 267         color(3);
 268         printf("]: ");
 269         color(2);
 270         getline(buf,len);
 271         color(7);
 272         if (buf[0]!=0) strcpy(str,buf);
 273         }
 274
 275 /*
 276  * boolprompt()  -  prompt for a yes/no, print the existing value and
 277  *                  allow the user to press return to keep it...
 278  */
 279 int boolprompt(char *prompt, int prev_val) {
 280         color(3);
 281         printf("%s [", prompt);
 282         color(1);
 283         printf("%s", (prev_val ? "Yes" : "No"));
 284         color(3);
 285         printf("]: ");
 286         color(7);
 287         return(yesno_d(prev_val));
 288         }
 289
 290 /*
 291  * intprompt()  -  like strprompt(), except for an integer
 292  *                 (note that it RETURNS the new value!)
 293  */
 294 int intprompt(char *prompt, int ival, int imin, int imax)
 295 {
 296         char buf[16];
 297         int i;
 298         i = ival;
 299         do {
 300                 snprintf(buf,sizeof buf,"%d",i);
 301                 strprompt(prompt,buf,15);
 302                 i=atoi(buf);
 303                 if (i<imin) printf("*** Must be no less than %d.\n",imin);
 304                 if (i>imax) printf("*** Must be no more than %d.\n",imax);
 305                 } while((i<imin)||(i>imax));
 306         return(i);
 307         }
 308
 309 /*
 310  * newprompt()  -  prompt for a string with no existing value
 311  *                 (clears out string buffer first)
 312  */
 313 void newprompt(char *prompt, char *str, int len)
 314 {
 315         color(3);
 316         printf("%s",prompt);
 317         color(2);
 318         getline(str,len);
 319         color(7);
 320         }
 321
 322
 323 int lkey(void) {        /* returns a lower case value */
 324         int a;
 325         a=inkey();
 326         if (isupper(a)) a=tolower(a);
 327         return(a);
 328         }
 329
 330 /*
 331  * parse the citadel.rc file
 332  */
 333 void load_command_set(void) {
 334         FILE *ccfile;
 335         char buf[256];
 336         struct citcmd *cptr;
 337         struct citcmd *lastcmd = NULL;
 338         int a,d;
 339         int b = 0;
 340
 341
 342         /* first, set up some defaults for non-required variables */
 343
 344         strcpy(editor_path,"");
 345         strcpy(printcmd,"");
 346         strcpy(rc_username,"");
 347         strcpy(rc_password,"");
 348         rc_floor_mode = 0;
 349         rc_exp_beep = 1;
 350         rc_allow_attachments = 0;
 351         strcpy(rc_exp_cmd, "");
 352         rc_display_message_numbers = 0;
 353         rc_force_mail_prompts = 0;
 354         rc_ansi_color = 0;
 355
 356         /* now try to open the citadel.rc file */
 357
 358         ccfile = NULL;
 359         if (getenv("HOME") != NULL) {
 360                 snprintf(buf,sizeof buf,"%s/.citadelrc",getenv("HOME"));
 361                 ccfile = fopen(buf,"r");
 362                 }
 363         if (ccfile==NULL) {
 364                 ccfile = fopen("/usr/local/lib/citadel.rc","r");
 365                 }
 366         if (ccfile==NULL) {
 367                 snprintf(buf,sizeof buf,"%s/citadel.rc",BBSDIR);
 368                 ccfile = fopen(buf,"r");
 369                 }
 370         if (ccfile==NULL) {
 371                 perror("commands: cannot open citadel.rc");
 372                 logoff(errno);
 373                 }
 374
 375         while (fgets(buf, 256, ccfile) != NULL) {
 376             while ( (strlen(buf)>0) ? (isspace(buf[strlen(buf)-1])) : 0 )
 377                 buf[strlen(buf)-1] = 0;
 378
 379             if (!struncmp(buf,"editor=",7))
 380                 strcpy(editor_path,&buf[7]);
 381
 382             if (!struncmp(buf,"printcmd=",9))
 383                 strcpy(printcmd,&buf[9]);
 384
 385             if (!struncmp(buf,"expcmd=",7))
 386                 strcpy(rc_exp_cmd,&buf[7]);
 387
 388             if (!struncmp(buf,"local_screen_dimensions=",24))
 389                 have_xterm = (char)atoi(&buf[24]);
 390
 391             if (!struncmp(buf,"use_floors=",11)) {
 392                 if (!strucmp(&buf[11],"yes")) rc_floor_mode = RC_YES;
 393                 if (!strucmp(&buf[11],"no")) rc_floor_mode = RC_NO;
 394                 if (!strucmp(&buf[11],"default")) rc_floor_mode = RC_DEFAULT;
 395                 }
 396
 397             if (!struncmp(buf,"beep=",5)) {
 398                 rc_exp_beep = atoi(&buf[5]);
 399                 }
 400
 401             if (!struncmp(buf,"allow_attachments=", 18)) {
 402                 rc_allow_attachments = atoi(&buf[18]);
 403                 }
 404
 405             if (!struncmp(buf,"display_message_numbers=", 24)) {
 406                 rc_display_message_numbers = atoi(&buf[24]);
 407                 }
 408
 409             if (!struncmp(buf,"force_mail_prompts=", 19)) {
 410                 rc_force_mail_prompts = atoi(&buf[19]);
 411                 }
 412
 413             if (!struncmp(buf,"ansi_color=", 11)) {
 414                 if (!strncasecmp(&buf[11], "on", 2))
 415                         rc_ansi_color = 1;
 416                 if (!strncasecmp(&buf[11], "auto", 4))
 417                         rc_ansi_color = 2;      /* autodetect */
 418                 if (!strncasecmp(&buf[11], "user", 4))
 419                         rc_ansi_color = 3;      /* user config */
 420                 }
 421
 422             if (!struncmp(buf,"username=",9))
 423                 strcpy(rc_username,&buf[9]);
 424
 425             if (!struncmp(buf,"password=",9))
 426                 strcpy(rc_password,&buf[9]);
 427
 428             if (!struncmp(buf,"cmd=",4)) {
 429                 strcpy(buf,&buf[4]);
 430
 431                 cptr = (struct citcmd *) malloc (sizeof(struct citcmd));
 432
 433                 cptr->c_cmdnum = atoi (buf);
 434                 for (d=strlen(buf); d>=0; --d)
 435                         if (buf[d]==',') b=d;
 436                 strcpy (buf, &buf[b+1]);
 437
 438                 cptr->c_axlevel = atoi (buf);
 439                 for (d=strlen(buf); d>=0; --d)
 440                         if (buf[d]==',') b=d;
 441                 strcpy (buf, &buf[b+1]);
 442
 443                 for (a=0; a<5; ++a) cptr->c_keys[a][0] = 0;
 444
 445                 a = 0;  b = 0;
 446                 buf[strlen(buf)+1] = 0;
 447                 while (strlen(buf) > 0) {
 448                         b = strlen(buf);
 449                         for (d=strlen(buf); d>=0; --d)
 450                                 if (buf[d]==',') b=d;
 451                         strncpy(cptr->c_keys[a],buf,b);
 452                         cptr->c_keys[a][b] = 0;
 453                         if (buf[b]==',')
 454                                 strcpy(buf,&buf[b+1]);
 455                         else
 456                                 strcpy(buf,"");
 457                         ++a;
 458                         }
 459
 460                 cptr->next = NULL;
 461                 if (cmdlist == NULL) cmdlist = cptr;
 462                 else lastcmd->next = cptr;
 463                 lastcmd = cptr;
 464                 }
 465             }
 466         fclose(ccfile);
 467         }
 468
 469
 470
 471 /*
 472  * return the key associated with a command
 473  */
 474 char keycmd(char *cmdstr)
 475 {
 476         int a;
 477
 478         for (a=0; a<strlen(cmdstr); ++a)
 479                 if (cmdstr[a]=='&')
 480                         return(tolower(cmdstr[a+1]));
 481         return(0);
 482         }
 483
 484
 485 /*
 486  * Output the string from a key command without the ampersand
 487  * "mode" should be set to 0 for normal or 1 for <C>ommand key highlighting
 488  */
 489 char *cmd_expand(char *strbuf, int mode)
 490 {
 491         int a;
 492         static char exp[64];
 493         char buf[256];
 494
 495         strcpy(exp,strbuf);
 496
 497         for (a=0; a<strlen(exp); ++a) {
 498                 if (strbuf[a] == '&') {
 499
 500                     if (mode == 0) {
 501                         strcpy(&exp[a],&exp[a+1]);
 502                         }
 503
 504                     if (mode == 1) {
 505                         exp[a] = '<';
 506                         strcpy(buf,&exp[a+2]);
 507                         exp[a+2] = '>';
 508                         exp[a+3] = 0;
 509                         strcat(exp,buf);
 510                         }
 511
 512                     }
 513
 514                 if (!strncmp(&exp[a],"^r",2)) {
 515                         strcpy(buf,exp);
 516                         strcpy(&exp[a],room_name);
 517                         strcat(exp,&buf[a+2]);
 518                         }
 519
 520                 if (!strncmp(&exp[a],"^c",2)) {
 521                         exp[a] = ',';
 522                         strcpy(&exp[a+1],&exp[a+2]);
 523                         }
 524
 525                 }
 526
 527         return(exp);
 528         }
 529
 530
 531
 532 /*
 533  * Comparison function to determine if entered commands match a
 534  * command loaded from the config file.
 535  */
 536 int cmdmatch(char *cmdbuf, struct citcmd *cptr, int ncomp)
 537 {
 538         int a;
 539         int cmdax;
 540
 541         cmdax = 0;
 542         if (is_room_aide) cmdax = 1;
 543         if (axlevel >=6) cmdax = 2;
 544
 545         for (a=0; a<ncomp; ++a) {
 546                 if ( (tolower(cmdbuf[a]) != keycmd(cptr->c_keys[a]))
 547                    || (cptr->c_axlevel > cmdax) )
 548                         return(0);
 549                 }
 550         return(1);
 551         }
 552
 553
 554 /*
 555  * This function returns 1 if a given command requires a string input
 556  */
 557 int requires_string(struct citcmd *cptr, int ncomp)
 558 {
 559         int a;
 560         char buf[64];
 561
 562         strcpy(buf,cptr->c_keys[ncomp-1]);
 563         for (a=0; a<strlen(buf); ++a) {
 564                 if (buf[a]==':') return(1);
 565                 }
 566         return(0);
 567         }
 568
 569
 570 /*
 571  * Input a command at the main prompt.
 572  * This function returns an integer command number.  If the command prompts
 573  * for a string then it is placed in the supplied buffer.
 574  */
 575 int getcmd(char *argbuf)
 576 {
 577         char cmdbuf[5];
 578         int cmdspaces[5];
 579         int cmdpos;
 580         int ch;
 581         int a;
 582         int got;
 583         int this_lazy_cmd;
 584         struct citcmd *cptr;
 585
 586         /* Switch color support on or off if we're in user mode */
 587         if (rc_ansi_color == 3) {
 588                 if (userflags & US_COLOR) enable_color = 1;
 589                 else enable_color = 0;
 590                 }
 591
 592         /* if we're running in idiot mode, display a cute little menu */
 593         IFNEXPERT formout("mainmenu");
 594
 595         print_express(); /* print express messages if there are any */
 596         strcpy(argbuf, "");
 597         cmdpos = 0;
 598         for (a=0; a<5; ++a) cmdbuf[a]=0;
 599         /* now the room prompt... */
 600         ok_to_interrupt = 1;
 601         printf("\n%s%c ",room_name,room_prompt(room_flags));
 602         fflush(stdout);
 603
 604         while(1) {
 605                 ch = inkey();
 606                 ok_to_interrupt = 0;
 607
 608                 /* Handle the backspace key, but only if there's something
 609                  * to backspace over...
 610                  */
 611                 if ( (ch == 8) && (cmdpos > 0) ) {
 612                         back(cmdspaces[cmdpos-1] + 1);
 613                         cmdbuf[cmdpos] = 0;
 614                         --cmdpos;
 615                         }
 616
 617                 /* Spacebar invokes "lazy traversal" commands */
 618                 if ( (ch == 32) && (cmdpos == 0) ) {
 619                         this_lazy_cmd = next_lazy_cmd;
 620                         if (this_lazy_cmd == 13) next_lazy_cmd = 5;
 621                         if (this_lazy_cmd == 5) next_lazy_cmd = 13;
 622                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 623                                 if (cptr->c_cmdnum == this_lazy_cmd) {
 624                                         for (a=0; a<5; ++a)
 625                                             if (cptr->c_keys[a][0] != 0)
 626                                                 printf("%s ", cmd_expand(
 627                                                         cptr->c_keys[a], 0));
 628                                         printf("\n");
 629                                         return(this_lazy_cmd);
 630                                         }
 631                                 }
 632                         printf("\n");
 633                         return(this_lazy_cmd);
 634                         }
 635
 636                 /* Otherwise, process the command */
 637                 cmdbuf[cmdpos] = tolower(ch);
 638
 639                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 640                         if (cmdmatch(cmdbuf,cptr,cmdpos+1)) {
 641
 642                                 printf("%s",cmd_expand(cptr->c_keys[cmdpos],0));
 643                                 cmdspaces[cmdpos] = strlen(
 644                                         cmd_expand(cptr->c_keys[cmdpos],0) );
 645                                 if (cmdpos<4)
 646                                         if ((cptr->c_keys[cmdpos+1]) != 0)
 647                                                 putc(' ',stdout);
 648                                 ++cmdpos;
 649                                 }
 650                         }
 651
 652                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 653                         if (cmdmatch(cmdbuf,cptr,5)) {
 654                                 /* We've found our command. */
 655                                 if (requires_string(cptr,cmdpos)) {
 656                                         getline(argbuf,32);
 657                                         }
 658                                 else {
 659                                         printf("\n");
 660                                         }
 661
 662                                 /* If this command is one that changes rooms,
 663                                  * then the next lazy-command (space bar)
 664                                  * should be "read new" instead of "goto"
 665                                  */
 666                                 if ((cptr->c_cmdnum==5)
 667                                         ||(cptr->c_cmdnum==6)
 668                                         ||(cptr->c_cmdnum==47)
 669                                         ||(cptr->c_cmdnum==52)
 670                                         ||(cptr->c_cmdnum==16)
 671                                         ||(cptr->c_cmdnum==20))
 672                                                 next_lazy_cmd = 13;
 673
 674                                 return(cptr->c_cmdnum);
 675
 676                                 }
 677                         }
 678
 679                 if (ch == '?') {
 680                         printf("\rOne of ...                         \n");
 681                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 682                             if (cmdmatch(cmdbuf,cptr,cmdpos)) {
 683                                 for (a=0; a<5; ++a) {
 684                                     printf("%s ",cmd_expand(cptr->c_keys[a],1));
 685                                     }
 686                                 printf("\n");
 687                                 }
 688                             }
 689
 690                         printf("\n%s%c ",room_name,room_prompt(room_flags));
 691                         got = 0;
 692                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 693                             if ((got==0)&&(cmdmatch(cmdbuf,cptr,cmdpos))) {
 694                                 for (a=0; a<cmdpos; ++a) {
 695                                     printf("%s ",
 696                                         cmd_expand(cptr->c_keys[a],0));
 697                                     }
 698                                 got = 1;
 699                                 }
 700                             }
 701                         }
 702
 703                 }
 704
 705         }
 706
 707
 708
 709
 710
 711 /*
 712  * set tty modes.  commands are:
 713  *
 714  * 0 - set to bbs mode, intr/quit disabled
 715  * 1 - set to bbs mode, intr/quit enabled
 716  * 2 - save current settings for later restoral
 717  * 3 - restore saved settings
 718  */
 719 #ifdef HAVE_TERMIOS_H
 720 void sttybbs(int cmd)           /* SysV version of sttybbs() */
 721          {
 722         struct termios live;
 723         static struct termios saved_settings;
 724         static int last_cmd = 0;
 725
 726         if (cmd == SB_LAST)
 727                 cmd = last_cmd;
 728         else
 729                 last_cmd = cmd;
 730
 731         if ( (cmd == 0) || (cmd == 1) ) {
 732                 tcgetattr(0,&live);
 733                 live.c_iflag=ISTRIP|IXON|IXANY;
 734                 live.c_oflag=OPOST|ONLCR;
 735                 live.c_lflag=ISIG|NOFLSH;
 736
 737                 if (cmd==SB_YES_INTR) {
 738                         live.c_cc[VINTR]=NEXT_KEY;
 739                         live.c_cc[VQUIT]=STOP_KEY;
 740                         signal(SIGINT,*sighandler);
 741                         signal(SIGQUIT,*sighandler);
 742                         }
 743                 else {
 744                         signal(SIGINT,SIG_IGN);
 745                         signal(SIGQUIT,SIG_IGN);
 746                         live.c_cc[VINTR]=(-1);
 747                         live.c_cc[VQUIT]=(-1);
 748                         }
 749
 750                 /* do we even need this stuff anymore? */
 751                 /* live.c_line=0; */
 752                 live.c_cc[VERASE]=8;
 753                 live.c_cc[VKILL]=24;
 754                 live.c_cc[VEOF]=1;
 755                 live.c_cc[VEOL]=255;
 756                 live.c_cc[VEOL2]=0;
 757                 live.c_cc[VSTART]=0;
 758                 tcsetattr(0,TCSADRAIN,&live);
 759                 }
 760         if (cmd == 2) {
 761                 tcgetattr(0,&saved_settings);
 762                 }
 763         if (cmd == 3) {
 764                 tcsetattr(0,TCSADRAIN,&saved_settings);
 765                 }
 766         }
 767 #else
 768 void sttybbs(int cmd)           /* BSD version of sttybbs() */
 769 {
 770         struct sgttyb live;
 771         static struct sgttyb saved_settings;
 772
 773         if ( (cmd == 0) || (cmd == 1) ) {
 774                 gtty(0,&live);
 775                 live.sg_flags |= CBREAK;
 776                 live.sg_flags |= CRMOD;
 777                 live.sg_flags |= NL1;
 778                 live.sg_flags &= ~ECHO;
 779                 if (cmd==1) live.sg_flags |= NOFLSH;
 780                 stty(0,&live);
 781                 }
 782         if (cmd == 2) {
 783                 gtty(0,&saved_settings);
 784                 }
 785         if (cmd == 3) {
 786                 stty(0,&saved_settings);
 787                 }
 788         }
 789 #endif
 790
 791
 792 /*
 793  * display_help()  -  help file viewer
 794  */
 795 void display_help(char *name)
 796 {
 797         formout(name);
 798         }
 799
 800
 801 /*
 802  * fmout()  -  Citadel text formatter and paginator
 803  */
 804 int fmout(int width, FILE *fp, char pagin, int height, int starting_lp, char subst)
 805                         /* screen width to use */
 806                         /* file to read from, or NULL to read from server */
 807                         /* nonzero if we should use the paginator */
 808                         /* screen height to use */
 809                         /* starting value for lines_printed, -1 for global */
 810                         /* nonzero if we should use hypertext mode */
 811         {
 812         int a,b,c,d,old;
 813         int real = (-1);
 814         char aaa[140];
 815         char buffer[512];
 816         int eof_flag = 0;
 817
 818         if (starting_lp >= 0) {
 819                 lines_printed = starting_lp;
 820                 }
 821         strcpy(aaa,""); old=255;
 822         strcpy(buffer,"");
 823         c=1; /* c is the current pos */
 824
 825         sigcaught = 0;
 826         sttybbs(1);
 827
 828 FMTA:   while ( (eof_flag==0) && (strlen(buffer)<126) ) {
 829                 if (sigcaught) goto OOPS;
 830                 if (fp!=NULL) { /* read from file */
 831                         if (feof(fp)) eof_flag = 1;
 832                         if (eof_flag==0) {
 833                                 a=getc(fp);
 834                                 buffer[strlen(buffer)+1] = 0;
 835                                 buffer[strlen(buffer)] = a;
 836                                 }
 837                         }
 838                 else {          /* read from server */
 839                         d=strlen(buffer);
 840                         serv_gets(&buffer[d]);
 841 while ( (!isspace(buffer[d])) && (isspace(buffer[strlen(buffer)-1])) )
 842         buffer[strlen(buffer)-1]=0;
 843                         if (!strcmp(&buffer[d],"000")) {
 844                                 buffer[d] = 0;
 845                                 eof_flag = 1;
 846                                 while(isspace(buffer[strlen(buffer)-1]))
 847                                         buffer[strlen(buffer)-1] = 0;
 848                                 }
 849                         d=strlen(buffer);
 850                         buffer[d] = 10;
 851                         buffer[d+1] = 0;
 852                         }
 853                 }
 854
 855         buffer[strlen(buffer)+1] = 0;
 856         a=buffer[0];
 857         strcpy(buffer,&buffer[1]);
 858
 859         old=real;
 860         real=a;
 861         if (a<=0) goto FMTEND;
 862
 863         if ( ((a==13)||(a==10)) && (old!=13) && (old!=10) ) a=32;
 864         if ( ((old==13)||(old==10)) && (isspace(real)) ) {
 865                 printf("\n");
 866                 ++lines_printed;
 867                 lines_printed = checkpagin(lines_printed,pagin,height);
 868                 c=1;
 869                 }
 870         if (a>126) goto FMTA;
 871
 872         if (a>32) {
 873         if ( ((strlen(aaa)+c)>(width-5)) && (strlen(aaa)>(width-5)) ) {
 874                 printf("\n%s",aaa); c=strlen(aaa); aaa[0]=0;
 875                 ++lines_printed;
 876                 lines_printed = checkpagin(lines_printed,pagin,height);
 877                 }
 878             b=strlen(aaa); aaa[b]=a; aaa[b+1]=0;
 879             }
 880         if (a==32) {
 881                 if ((strlen(aaa)+c)>(width-5)) {
 882                         c=1;
 883                         printf("\n");
 884                         ++lines_printed;
 885                         lines_printed = checkpagin(lines_printed,pagin,height);
 886                         }
 887                 printf("%s ",aaa); ++c; c=c+strlen(aaa);
 888                 strcpy(aaa,"");
 889                 goto FMTA;
 890                 }
 891         if ((a==13)||(a==10)) {
 892                 printf("%s\n",aaa);
 893                 c=1;
 894                 ++lines_printed;
 895                 lines_printed = checkpagin(lines_printed,pagin,height);
 896                 strcpy(aaa,"");
 897                 goto FMTA;
 898                 }
 899         goto FMTA;
 900
 901         /* signal caught; drain the server */
 902 OOPS:   do {
 903                 serv_gets(aaa);
 904                 } while(strcmp(aaa,"000"));
 905
 906 FMTEND: printf("\n");
 907         ++lines_printed;
 908         lines_printed = checkpagin(lines_printed,pagin,height);
 909         return(sigcaught);
 910 }
 911
 912
 913 /*
 914  * support ANSI color if defined
 915  */
 916 void color(int colornum)
 917 {
 918         if (enable_color) {
 919                 printf("\033[3%dm", colornum);
 920                 fflush(stdout);
 921                 }
 922         }
 923
 924 void cls(int colornum) {
 925         if (enable_color) {
 926                 printf("\033[4%dm\033[2J\033[H", colornum);
 927                 printf("\033[0m"); /* change to 1 for bold colours */
 928                 fflush(stdout);
 929                 }
 930         }
 931
 932
 933 /*
 934  * Detect whether ANSI color is available (answerback)
 935  */
 936 void send_ansi_detect(void) {
 937         if (rc_ansi_color == 2) {
 938                 printf("\033[c");
 939                 fflush(stdout);
 940                 time(&AnsiDetect);
 941                 }
 942         }
 943
 944 void look_for_ansi(void) {
 945         fd_set rfds;
 946         struct timeval tv;
 947         char abuf[512];
 948         time_t now;
 949         int a;
 950
 951         if (rc_ansi_color == 0) {
 952                 enable_color = 0;
 953                 }
 954         else if (rc_ansi_color == 1) {
 955                 enable_color = 1;
 956                 }
 957         else if (rc_ansi_color == 2) {
 958
 959                 /* otherwise, do the auto-detect */
 960
 961                 strcpy(abuf, "");
 962
 963                 time(&now);
 964                 if ( (now - AnsiDetect) < 2 ) sleep(1);
 965
 966                 do {
 967                         FD_ZERO(&rfds);
 968                         FD_SET(0,&rfds);
 969                         tv.tv_sec = 0;
 970                         tv.tv_usec = 1;
 971
 972                         select(1, &rfds, NULL, NULL, &tv);
 973                         if (FD_ISSET(0, &rfds)) {
 974                                 abuf[strlen(abuf)+1] = 0;
 975                                 read(0, &abuf[strlen(abuf)], 1);
 976                                 }
 977
 978                         } while (FD_ISSET(0, &rfds));
 979
 980                 for (a=0; a<strlen(abuf); ++a) {
 981                         if ( (abuf[a] == 27) && (abuf[a+1] == '[')
 982                         && (abuf[a+2] == '?') ) {
 983                                 enable_color = 1;
 984                                 }
 985                         }
 986                 }
 987
 988         }