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