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