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 <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 #ifndef HAVE_SNPRINTF
  43 #include "snprintf.h"
  44 #endif
  45
  46 struct citcmd {
  47         struct citcmd *next;
  48         int c_cmdnum;
  49         int c_axlevel;
  50         char c_keys[5][64];
  51         };
  52
  53 #define IFNEXPERT if ((userflags&US_EXPERT)==0)
  54
  55
  56 int rc_exp_beep;
  57 char rc_exp_cmd[256];
  58 int rc_allow_attachments;
  59 int rc_display_message_numbers;
  60 int rc_force_mail_prompts;
  61 int rc_ansi_color;
  62
  63 char *gl_string;
  64 int next_lazy_cmd = 5;
  65
  66 struct citcmd *cmdlist = NULL;
  67
  68
  69 /* these variables are local to this module */
  70 char keepalives_enabled = KA_YES;       /* send NOOPs to server when idle */
  71 int ok_to_interrupt = 0;                /* print express msgs asynchronously */
  72 time_t AnsiDetect;                      /* when did we send the detect code? */
  73 int enable_color = 0;                   /* nonzero for ANSI color */
  74
  75
  76 /*
  77  * print_express()  -  print express messages if there are any
  78  */
  79 void print_express(void) {
  80         char buf[256];
  81         FILE *outpipe;
  82
  83         if (express_msgs == 0) return;
  84         express_msgs = 0;
  85         serv_puts("PEXP");
  86         serv_gets(buf);
  87         if (buf[0]!='1') return;
  88
  89         if (strlen(rc_exp_cmd) > 0) {
  90                 outpipe = popen(rc_exp_cmd, "w");
  91                 if (outpipe != NULL) {
  92                         while (serv_gets(buf), strcmp(buf,"000")) {
  93                                 fprintf(outpipe, "%s\n", buf);
  94                                 }
  95                         pclose(outpipe);
  96                         return;
  97                         }
  98                 }
  99
 100         /* fall back to built-in express message display */
 101         if (rc_exp_beep) {
 102                 putc(7,stdout);
 103                 }
 104         color(1);
 105         printf("---\n");
 106         while (serv_gets(buf), strcmp(buf,"000")) {
 107                 printf("%s\n",buf);
 108                 }
 109         printf("---\n");
 110         color(7);
 111         }
 112
 113
 114 void set_keepalives(int s)
 115 {
 116         keepalives_enabled = (char)s;
 117         }
 118
 119 /*
 120  * This loop handles the "keepalive" messages sent to the server when idling.
 121  */
 122 void do_keepalive(void) {
 123         char buf[256];
 124         static time_t idlet = 0;
 125         time_t now;
 126
 127         time(&now);
 128         if ((now - idlet) < ((long)S_KEEPALIVE)) return;
 129         time(&idlet);
 130
 131         /* Do a space-backspace to keep socksified telnet sessions open */
 132         printf(" %c", 8);
 133         fflush(stdout);
 134
 135         if (keepalives_enabled != KA_NO) {
 136                 serv_puts("NOOP");
 137                 if (keepalives_enabled == KA_YES) {
 138                         serv_gets(buf);
 139                         if (buf[3]=='*') {
 140                                 express_msgs = 1;
 141                                 if (ok_to_interrupt == 1) {
 142                                         printf("\r%64s\r", "");
 143                                         print_express();
 144                                         printf("%s%c ",room_name,
 145                                                 room_prompt(room_flags));
 146                                         fflush(stdout);
 147                                         }
 148                                 }
 149                         }
 150                 }
 151         }
 152
 153
 154 int inkey(void) {               /* get a character from the keyboard, with   */
 155         int a;          /* the watchdog timer in effect if necessary */
 156         fd_set rfds;
 157         struct timeval tv;
 158         time_t start_time, now;
 159         char inbuf[2];
 160
 161         fflush(stdout);
 162         time(&start_time);
 163
 164         do {
 165
 166                 /* This loop waits for keyboard input.  If the keepalive
 167                  * timer expires, it sends a keepalive to the server if
 168                  * necessary and then waits again.
 169                  */
 170                 do {
 171                         do_keepalive();
 172                         FD_ZERO(&rfds);
 173                         FD_SET(0,&rfds);
 174                         tv.tv_sec = S_KEEPALIVE;
 175                         tv.tv_usec = 0;
 176
 177                         time(&now);
 178                         if (((now-start_time) > SLEEPING)
 179                            && (SLEEPING != 0) && (getppid()==1)) {
 180                                 printf("Sleeping? Call again.\n");
 181                                 logoff(SIGALRM);
 182                                 }
 183
 184                         select(1, &rfds, NULL, NULL, &tv);
 185                         } while (!FD_ISSET(0, &rfds));
 186
 187
 188
 189
 190                 /* At this point, there's input, so fetch it.
 191                  * (There's a hole in the bucket...)
 192                  */
 193                 read(0, inbuf, 1);
 194                 a = inbuf[0];
 195                 if (a==127) a=8;
 196                 if (a>126) a=0;
 197                 if (a==10) a=13;
 198                 if (((a!=4)&&(a!=13)&&(a!=8)&&(a!=NEXT_KEY)&&(a!=STOP_KEY))
 199                         && ((a<32)||(a>126))) a=0;
 200                 } while(a==0);
 201         return(a);
 202         }
 203
 204
 205 int yesno(void) { /* Returns 1 for yes, 0 for no */
 206 int a;
 207         while (1) {
 208                 a=inkey(); a=tolower(a);
 209                 if (a=='y') { printf("Yes\n"); return(1); }
 210                 if (a=='n') { printf("No\n");  return(0); }
 211                 }
 212         }
 213
 214 int yesno_d(int d) /* Returns 1 for yes, 0 for no, arg is default value */
 215        {
 216 int a;
 217         while (1) {
 218                 a=inkey(); a=tolower(a);
 219                 if (a==13) a=(d ? 'y' : 'n');
 220                 if (a=='y') { printf("Yes\n"); return(1); }
 221                 if (a=='n') { printf("No\n");  return(0); }
 222                 }
 223         }
 224
 225
 226
 227
 228 void getline(char *string, int lim)     /* Gets a line from the terminal */
 229                         /* Pointer to string buffer */
 230                         /* Maximum length - if negative, no-show */
 231 {
 232         int a,b;
 233         char flag = 0;
 234
 235         if (lim<0) { lim=(0-lim); flag=1; }
 236         strcpy(string,"");
 237         gl_string = string;
 238 GLA:    a=inkey(); a=(a&127);
 239         if ((a==8)&&(strlen(string)==0)) goto GLA;
 240         if ((a!=13)&&(a!=8)&&(strlen(string)==lim)) goto GLA;
 241         if ((a==8)&&(string[0]!=0)) {
 242                 string[strlen(string)-1]=0;
 243                 putc(8,stdout); putc(32,stdout); putc(8,stdout); goto GLA; }
 244         if ((a==13)||(a==10)) {
 245                 putc(13,stdout);
 246                 putc(10,stdout);
 247                 return;
 248                 }
 249         if (a<32) a='.';
 250         b=strlen(string);
 251         string[b]=a;
 252         string[b+1]=0;
 253         if (flag==0) putc(a,stdout);
 254         if (flag==1) putc('*',stdout);
 255         goto GLA;
 256         }
 257
 258
 259 /*
 260  * strprompt()  -  prompt for a string, print the existing value and
 261  *                 allow the user to press return to keep it...
 262  */
 263 void strprompt(char *prompt, char *str, int len)
 264 {
 265         char buf[128];
 266         print_express();
 267         color(3);
 268         printf("%s [", prompt);
 269         color(1);
 270         printf("%s", str);
 271         color(3);
 272         printf("]: ");
 273         color(2);
 274         getline(buf,len);
 275         color(7);
 276         if (buf[0]!=0) strcpy(str,buf);
 277         }
 278
 279 /*
 280  * boolprompt()  -  prompt for a yes/no, print the existing value and
 281  *                  allow the user to press return to keep it...
 282  */
 283 int boolprompt(char *prompt, int prev_val) {
 284         color(3);
 285         printf("%s [", prompt);
 286         color(1);
 287         printf("%s", (prev_val ? "Yes" : "No"));
 288         color(3);
 289         printf("]: ");
 290         color(7);
 291         return(yesno_d(prev_val));
 292         }
 293
 294 /*
 295  * intprompt()  -  like strprompt(), except for an integer
 296  *                 (note that it RETURNS the new value!)
 297  */
 298 int intprompt(char *prompt, int ival, int imin, int imax)
 299 {
 300         char buf[16];
 301         int i;
 302         i = ival;
 303         do {
 304                 snprintf(buf,sizeof buf,"%d",i);
 305                 strprompt(prompt,buf,15);
 306                 i=atoi(buf);
 307                 if (i<imin) printf("*** Must be no less than %d.\n",imin);
 308                 if (i>imax) printf("*** Must be no more than %d.\n",imax);
 309                 } while((i<imin)||(i>imax));
 310         return(i);
 311         }
 312
 313 /*
 314  * newprompt()  -  prompt for a string with no existing value
 315  *                 (clears out string buffer first)
 316  */
 317 void newprompt(char *prompt, char *str, int len)
 318 {
 319         color(3);
 320         printf("%s",prompt);
 321         color(2);
 322         getline(str,len);
 323         color(7);
 324         }
 325
 326
 327 int lkey(void) {        /* returns a lower case value */
 328         int a;
 329         a=inkey();
 330         if (isupper(a)) a=tolower(a);
 331         return(a);
 332         }
 333
 334 /*
 335  * parse the citadel.rc file
 336  */
 337 void load_command_set(void) {
 338         FILE *ccfile;
 339         char buf[256];
 340         struct citcmd *cptr;
 341         struct citcmd *lastcmd = NULL;
 342         int a,d;
 343         int b = 0;
 344
 345
 346         /* first, set up some defaults for non-required variables */
 347
 348         strcpy(editor_path,"");
 349         strcpy(printcmd,"");
 350         strcpy(rc_username,"");
 351         strcpy(rc_password,"");
 352         rc_floor_mode = 0;
 353         rc_exp_beep = 1;
 354         rc_allow_attachments = 0;
 355         strcpy(rc_exp_cmd, "");
 356         rc_display_message_numbers = 0;
 357         rc_force_mail_prompts = 0;
 358         rc_ansi_color = 0;
 359
 360         /* now try to open the citadel.rc file */
 361
 362         ccfile = NULL;
 363         if (getenv("HOME") != NULL) {
 364                 snprintf(buf,sizeof buf,"%s/.citadelrc",getenv("HOME"));
 365                 ccfile = fopen(buf,"r");
 366                 }
 367         if (ccfile==NULL) {
 368                 ccfile = fopen("/usr/local/lib/citadel.rc","r");
 369                 }
 370         if (ccfile==NULL) {
 371                 snprintf(buf,sizeof buf,"%s/citadel.rc",BBSDIR);
 372                 ccfile = fopen(buf,"r");
 373                 }
 374         if (ccfile==NULL) {
 375                 ccfile = fopen("./citadel.rc","r");
 376                 }
 377         if (ccfile==NULL) {
 378                 perror("commands: cannot open citadel.rc");
 379                 logoff(errno);
 380                 }
 381
 382         while (fgets(buf, 256, ccfile) != NULL) {
 383             while ( (strlen(buf)>0) ? (isspace(buf[strlen(buf)-1])) : 0 )
 384                 buf[strlen(buf)-1] = 0;
 385
 386             if (!struncmp(buf,"editor=",7))
 387                 strcpy(editor_path,&buf[7]);
 388
 389             if (!struncmp(buf,"printcmd=",9))
 390                 strcpy(printcmd,&buf[9]);
 391
 392             if (!struncmp(buf,"expcmd=",7))
 393                 strcpy(rc_exp_cmd,&buf[7]);
 394
 395             if (!struncmp(buf,"local_screen_dimensions=",24))
 396                 have_xterm = (char)atoi(&buf[24]);
 397
 398             if (!struncmp(buf,"use_floors=",11)) {
 399                 if (!strucmp(&buf[11],"yes")) rc_floor_mode = RC_YES;
 400                 if (!strucmp(&buf[11],"no")) rc_floor_mode = RC_NO;
 401                 if (!strucmp(&buf[11],"default")) rc_floor_mode = RC_DEFAULT;
 402                 }
 403
 404             if (!struncmp(buf,"beep=",5)) {
 405                 rc_exp_beep = atoi(&buf[5]);
 406                 }
 407
 408             if (!struncmp(buf,"allow_attachments=", 18)) {
 409                 rc_allow_attachments = atoi(&buf[18]);
 410                 }
 411
 412             if (!struncmp(buf,"display_message_numbers=", 24)) {
 413                 rc_display_message_numbers = atoi(&buf[24]);
 414                 }
 415
 416             if (!struncmp(buf,"force_mail_prompts=", 19)) {
 417                 rc_force_mail_prompts = atoi(&buf[19]);
 418                 }
 419
 420             if (!struncmp(buf,"ansi_color=", 11)) {
 421                 if (!strncasecmp(&buf[11], "on", 2))
 422                         rc_ansi_color = 1;
 423                 if (!strncasecmp(&buf[11], "auto", 4))
 424                         rc_ansi_color = 2;      /* autodetect */
 425                 if (!strncasecmp(&buf[11], "user", 4))
 426                         rc_ansi_color = 3;      /* user config */
 427                 }
 428
 429             if (!struncmp(buf,"username=",9))
 430                 strcpy(rc_username,&buf[9]);
 431
 432             if (!struncmp(buf,"password=",9))
 433                 strcpy(rc_password,&buf[9]);
 434
 435             if (!struncmp(buf,"cmd=",4)) {
 436                 strcpy(buf,&buf[4]);
 437
 438                 cptr = (struct citcmd *) malloc (sizeof(struct citcmd));
 439
 440                 cptr->c_cmdnum = atoi (buf);
 441                 for (d=strlen(buf); d>=0; --d)
 442                         if (buf[d]==',') b=d;
 443                 strcpy (buf, &buf[b+1]);
 444
 445                 cptr->c_axlevel = atoi (buf);
 446                 for (d=strlen(buf); d>=0; --d)
 447                         if (buf[d]==',') b=d;
 448                 strcpy (buf, &buf[b+1]);
 449
 450                 for (a=0; a<5; ++a) cptr->c_keys[a][0] = 0;
 451
 452                 a = 0;  b = 0;
 453                 buf[strlen(buf)+1] = 0;
 454                 while (strlen(buf) > 0) {
 455                         b = strlen(buf);
 456                         for (d=strlen(buf); d>=0; --d)
 457                                 if (buf[d]==',') b=d;
 458                         strncpy(cptr->c_keys[a],buf,b);
 459                         cptr->c_keys[a][b] = 0;
 460                         if (buf[b]==',')
 461                                 strcpy(buf,&buf[b+1]);
 462                         else
 463                                 strcpy(buf,"");
 464                         ++a;
 465                         }
 466
 467                 cptr->next = NULL;
 468                 if (cmdlist == NULL) cmdlist = cptr;
 469                 else lastcmd->next = cptr;
 470                 lastcmd = cptr;
 471                 }
 472             }
 473         fclose(ccfile);
 474         }
 475
 476
 477
 478 /*
 479  * return the key associated with a command
 480  */
 481 char keycmd(char *cmdstr)
 482 {
 483         int a;
 484
 485         for (a=0; a<strlen(cmdstr); ++a)
 486                 if (cmdstr[a]=='&')
 487                         return(tolower(cmdstr[a+1]));
 488         return(0);
 489         }
 490
 491
 492 /*
 493  * Output the string from a key command without the ampersand
 494  * "mode" should be set to 0 for normal or 1 for <C>ommand key highlighting
 495  */
 496 char *cmd_expand(char *strbuf, int mode)
 497 {
 498         int a;
 499         static char exp[64];
 500         char buf[256];
 501
 502         strcpy(exp,strbuf);
 503
 504         for (a=0; a<strlen(exp); ++a) {
 505                 if (strbuf[a] == '&') {
 506
 507                     if (mode == 0) {
 508                         strcpy(&exp[a],&exp[a+1]);
 509                         }
 510
 511                     if (mode == 1) {
 512                         exp[a] = '<';
 513                         strcpy(buf,&exp[a+2]);
 514                         exp[a+2] = '>';
 515                         exp[a+3] = 0;
 516                         strcat(exp,buf);
 517                         }
 518
 519                     }
 520
 521                 if (!strncmp(&exp[a],"^r",2)) {
 522                         strcpy(buf,exp);
 523                         strcpy(&exp[a],room_name);
 524                         strcat(exp,&buf[a+2]);
 525                         }
 526
 527                 if (!strncmp(&exp[a],"^c",2)) {
 528                         exp[a] = ',';
 529                         strcpy(&exp[a+1],&exp[a+2]);
 530                         }
 531
 532                 }
 533
 534         return(exp);
 535         }
 536
 537
 538
 539 /*
 540  * Comparison function to determine if entered commands match a
 541  * command loaded from the config file.
 542  */
 543 int cmdmatch(char *cmdbuf, struct citcmd *cptr, int ncomp)
 544 {
 545         int a;
 546         int cmdax;
 547
 548         cmdax = 0;
 549         if (is_room_aide) cmdax = 1;
 550         if (axlevel >=6) cmdax = 2;
 551
 552         for (a=0; a<ncomp; ++a) {
 553                 if ( (tolower(cmdbuf[a]) != keycmd(cptr->c_keys[a]))
 554                    || (cptr->c_axlevel > cmdax) )
 555                         return(0);
 556                 }
 557         return(1);
 558         }
 559
 560
 561 /*
 562  * This function returns 1 if a given command requires a string input
 563  */
 564 int requires_string(struct citcmd *cptr, int ncomp)
 565 {
 566         int a;
 567         char buf[64];
 568
 569         strcpy(buf,cptr->c_keys[ncomp-1]);
 570         for (a=0; a<strlen(buf); ++a) {
 571                 if (buf[a]==':') return(1);
 572                 }
 573         return(0);
 574         }
 575
 576
 577 /*
 578  * Input a command at the main prompt.
 579  * This function returns an integer command number.  If the command prompts
 580  * for a string then it is placed in the supplied buffer.
 581  */
 582 int getcmd(char *argbuf)
 583 {
 584         char cmdbuf[5];
 585         int cmdspaces[5];
 586         int cmdpos;
 587         int ch;
 588         int a;
 589         int got;
 590         int this_lazy_cmd;
 591         struct citcmd *cptr;
 592
 593         /* Switch color support on or off if we're in user mode */
 594         if (rc_ansi_color == 3) {
 595                 if (userflags & US_COLOR) enable_color = 1;
 596                 else enable_color = 0;
 597                 }
 598
 599         /* if we're running in idiot mode, display a cute little menu */
 600         IFNEXPERT formout("mainmenu");
 601
 602         print_express(); /* print express messages if there are any */
 603         strcpy(argbuf, "");
 604         cmdpos = 0;
 605         for (a=0; a<5; ++a) cmdbuf[a]=0;
 606         /* now the room prompt... */
 607         ok_to_interrupt = 1;
 608         printf("\n%s%c ",room_name,room_prompt(room_flags));
 609         fflush(stdout);
 610
 611         while(1) {
 612                 ch = inkey();
 613                 ok_to_interrupt = 0;
 614
 615                 /* Handle the backspace key, but only if there's something
 616                  * to backspace over...
 617                  */
 618                 if ( (ch == 8) && (cmdpos > 0) ) {
 619                         back(cmdspaces[cmdpos-1] + 1);
 620                         cmdbuf[cmdpos] = 0;
 621                         --cmdpos;
 622                         }
 623
 624                 /* Spacebar invokes "lazy traversal" commands */
 625                 if ( (ch == 32) && (cmdpos == 0) ) {
 626                         this_lazy_cmd = next_lazy_cmd;
 627                         if (this_lazy_cmd == 13) next_lazy_cmd = 5;
 628                         if (this_lazy_cmd == 5) next_lazy_cmd = 13;
 629                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 630                                 if (cptr->c_cmdnum == this_lazy_cmd) {
 631                                         for (a=0; a<5; ++a)
 632                                             if (cptr->c_keys[a][0] != 0)
 633                                                 printf("%s ", cmd_expand(
 634                                                         cptr->c_keys[a], 0));
 635                                         printf("\n");
 636                                         return(this_lazy_cmd);
 637                                         }
 638                                 }
 639                         printf("\n");
 640                         return(this_lazy_cmd);
 641                         }
 642
 643                 /* Otherwise, process the command */
 644                 cmdbuf[cmdpos] = tolower(ch);
 645
 646                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 647                         if (cmdmatch(cmdbuf,cptr,cmdpos+1)) {
 648
 649                                 printf("%s",cmd_expand(cptr->c_keys[cmdpos],0));
 650                                 cmdspaces[cmdpos] = strlen(
 651                                         cmd_expand(cptr->c_keys[cmdpos],0) );
 652                                 if (cmdpos<4)
 653                                         if ((cptr->c_keys[cmdpos+1]) != 0)
 654                                                 putc(' ',stdout);
 655                                 ++cmdpos;
 656                                 }
 657                         }
 658
 659                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 660                         if (cmdmatch(cmdbuf,cptr,5)) {
 661                                 /* We've found our command. */
 662                                 if (requires_string(cptr,cmdpos)) {
 663                                         getline(argbuf,32);
 664                                         }
 665                                 else {
 666                                         printf("\n");
 667                                         }
 668
 669                                 /* If this command is one that changes rooms,
 670                                  * then the next lazy-command (space bar)
 671                                  * should be "read new" instead of "goto"
 672                                  */
 673                                 if ((cptr->c_cmdnum==5)
 674                                         ||(cptr->c_cmdnum==6)
 675                                         ||(cptr->c_cmdnum==47)
 676                                         ||(cptr->c_cmdnum==52)
 677                                         ||(cptr->c_cmdnum==16)
 678                                         ||(cptr->c_cmdnum==20))
 679                                                 next_lazy_cmd = 13;
 680
 681                                 return(cptr->c_cmdnum);
 682
 683                                 }
 684                         }
 685
 686                 if (ch == '?') {
 687                         printf("\rOne of ...                         \n");
 688                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 689                             if (cmdmatch(cmdbuf,cptr,cmdpos)) {
 690                                 for (a=0; a<5; ++a) {
 691                                     printf("%s ",cmd_expand(cptr->c_keys[a],1));
 692                                     }
 693                                 printf("\n");
 694                                 }
 695                             }
 696
 697                         printf("\n%s%c ",room_name,room_prompt(room_flags));
 698                         got = 0;
 699                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 700                             if ((got==0)&&(cmdmatch(cmdbuf,cptr,cmdpos))) {
 701                                 for (a=0; a<cmdpos; ++a) {
 702                                     printf("%s ",
 703                                         cmd_expand(cptr->c_keys[a],0));
 704                                     }
 705                                 got = 1;
 706                                 }
 707                             }
 708                         }
 709
 710                 }
 711
 712         }
 713
 714
 715
 716
 717
 718 /*
 719  * set tty modes.  commands are:
 720  *
 721  * 0 - set to bbs mode, intr/quit disabled
 722  * 1 - set to bbs mode, intr/quit enabled
 723  * 2 - save current settings for later restoral
 724  * 3 - restore saved settings
 725  */
 726 #ifdef HAVE_TERMIOS_H
 727 void sttybbs(int cmd)           /* SysV version of sttybbs() */
 728          {
 729         struct termios live;
 730         static struct termios saved_settings;
 731         static int last_cmd = 0;
 732
 733         if (cmd == SB_LAST)
 734                 cmd = last_cmd;
 735         else
 736                 last_cmd = cmd;
 737
 738         if ( (cmd == 0) || (cmd == 1) ) {
 739                 tcgetattr(0,&live);
 740                 live.c_iflag=ISTRIP|IXON|IXANY;
 741                 live.c_oflag=OPOST|ONLCR;
 742                 live.c_lflag=ISIG|NOFLSH;
 743
 744                 if (cmd==SB_YES_INTR) {
 745                         live.c_cc[VINTR]=NEXT_KEY;
 746                         live.c_cc[VQUIT]=STOP_KEY;
 747                         signal(SIGINT,*sighandler);
 748                         signal(SIGQUIT,*sighandler);
 749                         }
 750                 else {
 751                         signal(SIGINT,SIG_IGN);
 752                         signal(SIGQUIT,SIG_IGN);
 753                         live.c_cc[VINTR]=(-1);
 754                         live.c_cc[VQUIT]=(-1);
 755                         }
 756
 757                 /* do we even need this stuff anymore? */
 758                 /* live.c_line=0; */
 759                 live.c_cc[VERASE]=8;
 760                 live.c_cc[VKILL]=24;
 761                 live.c_cc[VEOF]=1;
 762                 live.c_cc[VEOL]=255;
 763                 live.c_cc[VEOL2]=0;
 764                 live.c_cc[VSTART]=0;
 765                 tcsetattr(0,TCSADRAIN,&live);
 766                 }
 767         if (cmd == 2) {
 768                 tcgetattr(0,&saved_settings);
 769                 }
 770         if (cmd == 3) {
 771                 tcsetattr(0,TCSADRAIN,&saved_settings);
 772                 }
 773         }
 774 #else
 775 void sttybbs(int cmd)           /* BSD version of sttybbs() */
 776 {
 777         struct sgttyb live;
 778         static struct sgttyb saved_settings;
 779
 780         if ( (cmd == 0) || (cmd == 1) ) {
 781                 gtty(0,&live);
 782                 live.sg_flags |= CBREAK;
 783                 live.sg_flags |= CRMOD;
 784                 live.sg_flags |= NL1;
 785                 live.sg_flags &= ~ECHO;
 786                 if (cmd==1) live.sg_flags |= NOFLSH;
 787                 stty(0,&live);
 788                 }
 789         if (cmd == 2) {
 790                 gtty(0,&saved_settings);
 791                 }
 792         if (cmd == 3) {
 793                 stty(0,&saved_settings);
 794                 }
 795         }
 796 #endif
 797
 798
 799 /*
 800  * display_help()  -  help file viewer
 801  */
 802 void display_help(char *name)
 803 {
 804         formout(name);
 805         }
 806
 807
 808 /*
 809  * fmout()  -  Citadel text formatter and paginator
 810  */
 811 int fmout(int width, FILE *fp, char pagin, int height, int starting_lp, char subst)
 812                         /* screen width to use */
 813                         /* file to read from, or NULL to read from server */
 814                         /* nonzero if we should use the paginator */
 815                         /* screen height to use */
 816                         /* starting value for lines_printed, -1 for global */
 817                         /* nonzero if we should use hypertext mode */
 818         {
 819         int a,b,c,d,old;
 820         int real = (-1);
 821         char aaa[140];
 822         char buffer[512];
 823         int eof_flag = 0;
 824
 825         if (starting_lp >= 0) {
 826                 lines_printed = starting_lp;
 827                 }
 828         strcpy(aaa,""); old=255;
 829         strcpy(buffer,"");
 830         c=1; /* c is the current pos */
 831
 832         sigcaught = 0;
 833         sttybbs(1);
 834
 835 FMTA:   while ( (eof_flag==0) && (strlen(buffer)<126) ) {
 836                 if (sigcaught) goto OOPS;
 837                 if (fp!=NULL) { /* read from file */
 838                         if (feof(fp)) eof_flag = 1;
 839                         if (eof_flag==0) {
 840                                 a=getc(fp);
 841                                 buffer[strlen(buffer)+1] = 0;
 842                                 buffer[strlen(buffer)] = a;
 843                                 }
 844                         }
 845                 else {          /* read from server */
 846                         d=strlen(buffer);
 847                         serv_gets(&buffer[d]);
 848 while ( (!isspace(buffer[d])) && (isspace(buffer[strlen(buffer)-1])) )
 849         buffer[strlen(buffer)-1]=0;
 850                         if (!strcmp(&buffer[d],"000")) {
 851                                 buffer[d] = 0;
 852                                 eof_flag = 1;
 853                                 while(isspace(buffer[strlen(buffer)-1]))
 854                                         buffer[strlen(buffer)-1] = 0;
 855                                 }
 856                         d=strlen(buffer);
 857                         buffer[d] = 10;
 858                         buffer[d+1] = 0;
 859                         }
 860                 }
 861
 862         buffer[strlen(buffer)+1] = 0;
 863         a=buffer[0];
 864         strcpy(buffer,&buffer[1]);
 865
 866         old=real;
 867         real=a;
 868         if (a<=0) goto FMTEND;
 869
 870         if ( ((a==13)||(a==10)) && (old!=13) && (old!=10) ) a=32;
 871         if ( ((old==13)||(old==10)) && (isspace(real)) ) {
 872                 printf("\n");
 873                 ++lines_printed;
 874                 lines_printed = checkpagin(lines_printed,pagin,height);
 875                 c=1;
 876                 }
 877         if (a>126) goto FMTA;
 878
 879         if (a>32) {
 880         if ( ((strlen(aaa)+c)>(width-5)) && (strlen(aaa)>(width-5)) ) {
 881                 printf("\n%s",aaa); c=strlen(aaa); aaa[0]=0;
 882                 ++lines_printed;
 883                 lines_printed = checkpagin(lines_printed,pagin,height);
 884                 }
 885             b=strlen(aaa); aaa[b]=a; aaa[b+1]=0;
 886             }
 887         if (a==32) {
 888                 if ((strlen(aaa)+c)>(width-5)) {
 889                         c=1;
 890                         printf("\n");
 891                         ++lines_printed;
 892                         lines_printed = checkpagin(lines_printed,pagin,height);
 893                         }
 894                 printf("%s ",aaa); ++c; c=c+strlen(aaa);
 895                 strcpy(aaa,"");
 896                 goto FMTA;
 897                 }
 898         if ((a==13)||(a==10)) {
 899                 printf("%s\n",aaa);
 900                 c=1;
 901                 ++lines_printed;
 902                 lines_printed = checkpagin(lines_printed,pagin,height);
 903                 strcpy(aaa,"");
 904                 goto FMTA;
 905                 }
 906         goto FMTA;
 907
 908         /* signal caught; drain the server */
 909 OOPS:   do {
 910                 serv_gets(aaa);
 911                 } while(strcmp(aaa,"000"));
 912
 913 FMTEND: printf("\n");
 914         ++lines_printed;
 915         lines_printed = checkpagin(lines_printed,pagin,height);
 916         return(sigcaught);
 917 }
 918
 919
 920 /*
 921  * support ANSI color if defined
 922  */
 923 void color(int colornum)
 924 {
 925         if (enable_color) {
 926                 printf("\033[3%dm", colornum);
 927                 fflush(stdout);
 928                 }
 929         }
 930
 931 void cls(int colornum) {
 932         if (enable_color) {
 933                 printf("\033[4%dm\033[2J\033[H", colornum);
 934
 935                 printf("\033[1m");              /* bold colors */
 936                 /* printf("\033[0m"); */        /* non-bold colors */
 937
 938
 939                 fflush(stdout);
 940                 }
 941         }
 942
 943
 944 /*
 945  * Detect whether ANSI color is available (answerback)
 946  */
 947 void send_ansi_detect(void) {
 948         if (rc_ansi_color == 2) {
 949                 printf("\033[c");
 950                 fflush(stdout);
 951                 time(&AnsiDetect);
 952                 }
 953         }
 954
 955 void look_for_ansi(void) {
 956         fd_set rfds;
 957         struct timeval tv;
 958         char abuf[512];
 959         time_t now;
 960         int a;
 961
 962         if (rc_ansi_color == 0) {
 963                 enable_color = 0;
 964                 }
 965         else if (rc_ansi_color == 1) {
 966                 enable_color = 1;
 967                 }
 968         else if (rc_ansi_color == 2) {
 969
 970                 /* otherwise, do the auto-detect */
 971
 972                 strcpy(abuf, "");
 973
 974                 time(&now);
 975                 if ( (now - AnsiDetect) < 2 ) sleep(1);
 976
 977                 do {
 978                         FD_ZERO(&rfds);
 979                         FD_SET(0,&rfds);
 980                         tv.tv_sec = 0;
 981                         tv.tv_usec = 1;
 982
 983                         select(1, &rfds, NULL, NULL, &tv);
 984                         if (FD_ISSET(0, &rfds)) {
 985                                 abuf[strlen(abuf)+1] = 0;
 986                                 read(0, &abuf[strlen(abuf)], 1);
 987                                 }
 988
 989                         } while (FD_ISSET(0, &rfds));
 990
 991                 for (a=0; a<strlen(abuf); ++a) {
 992                         if ( (abuf[a] == 27) && (abuf[a+1] == '[')
 993                         && (abuf[a+2] == '?') ) {
 994                                 enable_color = 1;
 995                                 }
 996                         }
 997                 }
 998
 999         }