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 int 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         rc_allow_attachments = 0;
 300         strcpy(rc_exp_cmd, "");
 301
 302         /* now try to open the citadel.rc file */
 303
 304         ccfile = NULL;
 305         if (getenv("HOME") != NULL) {
 306                 sprintf(buf,"%s/.citadelrc",getenv("HOME"));
 307                 ccfile = fopen(buf,"r");
 308                 }
 309         if (ccfile==NULL) {
 310                 ccfile = fopen("/usr/local/lib/citadel.rc","r");
 311                 }
 312         if (ccfile==NULL) {
 313                 sprintf(buf,"%s/citadel.rc",BBSDIR);
 314                 ccfile = fopen(buf,"r");
 315                 }
 316         if (ccfile==NULL) {
 317                 perror("commands: cannot open citadel.rc");
 318                 logoff(errno);
 319                 }
 320
 321         while (fgets(buf, 256, ccfile) != NULL) {
 322             while ( (strlen(buf)>0) ? (isspace(buf[strlen(buf)-1])) : 0 )
 323                 buf[strlen(buf)-1] = 0;
 324
 325             if (!struncmp(buf,"editor=",7))
 326                 strcpy(editor_path,&buf[7]);
 327
 328             if (!struncmp(buf,"printcmd=",9))
 329                 strcpy(printcmd,&buf[9]);
 330
 331             if (!struncmp(buf,"expcmd=",7))
 332                 strcpy(rc_exp_cmd,&buf[7]);
 333
 334             if (!struncmp(buf,"local_screen_dimensions=",24))
 335                 have_xterm = (char)atoi(&buf[24]);
 336
 337             if (!struncmp(buf,"use_floors=",11)) {
 338                 if (!strucmp(&buf[11],"yes")) rc_floor_mode = RC_YES;
 339                 if (!strucmp(&buf[11],"no")) rc_floor_mode = RC_NO;
 340                 if (!strucmp(&buf[11],"default")) rc_floor_mode = RC_DEFAULT;
 341                 }
 342
 343             if (!struncmp(buf,"beep=",5)) {
 344                 rc_exp_beep = atoi(&buf[5]);
 345                 }
 346
 347             if (!struncmp(buf,"allow_attachments=", 18)) {
 348                 rc_allow_attachments = atoi(&buf[18]);
 349                 }
 350
 351             if (!struncmp(buf,"username=",9))
 352                 strcpy(rc_username,&buf[9]);
 353
 354             if (!struncmp(buf,"password=",9))
 355                 strcpy(rc_password,&buf[9]);
 356
 357             if (!struncmp(buf,"cmd=",4)) {
 358                 strcpy(buf,&buf[4]);
 359
 360                 cptr = (struct citcmd *) malloc (sizeof(struct citcmd));
 361
 362                 cptr->c_cmdnum = atoi (buf);
 363                 for (d=strlen(buf); d>=0; --d)
 364                         if (buf[d]==',') b=d;
 365                 strcpy (buf, &buf[b+1]);
 366
 367                 cptr->c_axlevel = atoi (buf);
 368                 for (d=strlen(buf); d>=0; --d)
 369                         if (buf[d]==',') b=d;
 370                 strcpy (buf, &buf[b+1]);
 371
 372                 for (a=0; a<5; ++a) cptr->c_keys[a][0] = 0;
 373
 374                 a = 0;  b = 0;
 375                 buf[strlen(buf)+1] = 0;
 376                 while (strlen(buf) > 0) {
 377                         b = strlen(buf);
 378                         for (d=strlen(buf); d>=0; --d)
 379                                 if (buf[d]==',') b=d;
 380                         strncpy(cptr->c_keys[a],buf,b);
 381                         cptr->c_keys[a][b] = 0;
 382                         if (buf[b]==',')
 383                                 strcpy(buf,&buf[b+1]);
 384                         else
 385                                 strcpy(buf,"");
 386                         ++a;
 387                         }
 388
 389                 cptr->next = cmdlist;
 390                 cmdlist = cptr;
 391
 392                 }
 393             }
 394         fclose(ccfile);
 395         }
 396
 397
 398
 399 /*
 400  * return the key associated with a command
 401  */
 402 char keycmd(char *cmdstr)
 403 {
 404         int a;
 405
 406         for (a=0; a<strlen(cmdstr); ++a)
 407                 if (cmdstr[a]=='&')
 408                         return(tolower(cmdstr[a+1]));
 409         return(0);
 410         }
 411
 412
 413 /*
 414  * Output the string from a key command without the ampersand
 415  * "mode" should be set to 0 for normal or 1 for <C>ommand key highlighting
 416  */
 417 char *cmd_expand(char *strbuf, int mode)
 418 {
 419         int a;
 420         static char exp[64];
 421         char buf[256];
 422
 423         strcpy(exp,strbuf);
 424
 425         for (a=0; a<strlen(exp); ++a) {
 426                 if (strbuf[a] == '&') {
 427
 428                     if (mode == 0) {
 429                         strcpy(&exp[a],&exp[a+1]);
 430                         }
 431
 432                     if (mode == 1) {
 433                         exp[a] = '<';
 434                         strcpy(buf,&exp[a+2]);
 435                         exp[a+2] = '>';
 436                         exp[a+3] = 0;
 437                         strcat(exp,buf);
 438                         }
 439
 440                     }
 441
 442                 if (!strncmp(&exp[a],"^r",2)) {
 443                         strcpy(buf,exp);
 444                         strcpy(&exp[a],room_name);
 445                         strcat(exp,&buf[a+2]);
 446                         }
 447
 448                 if (!strncmp(&exp[a],"^c",2)) {
 449                         exp[a] = ',';
 450                         strcpy(&exp[a+1],&exp[a+2]);
 451                         }
 452
 453                 }
 454
 455         return(exp);
 456         }
 457
 458
 459
 460 /*
 461  * Comparison function to determine if entered commands match a
 462  * command loaded from the config file.
 463  */
 464 int cmdmatch(char *cmdbuf, struct citcmd *cptr, int ncomp)
 465 {
 466         int a;
 467         int cmdax;
 468
 469         cmdax = 0;
 470         if (is_room_aide) cmdax = 1;
 471         if (axlevel >=6) cmdax = 2;
 472
 473         for (a=0; a<ncomp; ++a) {
 474                 if ( (tolower(cmdbuf[a]) != keycmd(cptr->c_keys[a]))
 475                    || (cptr->c_axlevel > cmdax) )
 476                         return(0);
 477                 }
 478         return(1);
 479         }
 480
 481
 482 /*
 483  * This function returns 1 if a given command requires a string input
 484  */
 485 int requires_string(struct citcmd *cptr, int ncomp)
 486 {
 487         int a;
 488         char buf[64];
 489
 490         strcpy(buf,cptr->c_keys[ncomp-1]);
 491         for (a=0; a<strlen(buf); ++a) {
 492                 if (buf[a]==':') return(1);
 493                 }
 494         return(0);
 495         }
 496
 497
 498 /*
 499  * Input a command at the main prompt.
 500  * This function returns an integer command number.  If the command prompts
 501  * for a string then it is placed in the supplied buffer.
 502  */
 503 int getcmd(char *argbuf)
 504 {
 505         char cmdbuf[5];
 506         int cmdspaces[5];
 507         int cmdpos;
 508         int ch;
 509         int a;
 510         int got;
 511         struct citcmd *cptr;
 512
 513         /* if we're running in idiot mode, display a cute little menu */
 514         IFNEXPERT formout("mainmenu");
 515
 516         print_express(); /* print express messages if there are any */
 517         strcpy(argbuf, "");
 518         cmdpos = 0;
 519         for (a=0; a<5; ++a) cmdbuf[a]=0;
 520         /* now the room prompt... */
 521         ok_to_interrupt = 1;
 522         printf("\n%s%c ",room_name,room_prompt(room_flags));
 523         fflush(stdout);
 524
 525         while(1) {
 526                 ch = inkey();
 527                 ok_to_interrupt = 0;
 528
 529                 if ( (ch == 8) && (cmdpos > 0) ) {
 530                         back(cmdspaces[cmdpos-1] + 1);
 531                         cmdbuf[cmdpos] = 0;
 532                         --cmdpos;
 533                         }
 534
 535                 cmdbuf[cmdpos] = tolower(ch);
 536
 537                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 538                         if (cmdmatch(cmdbuf,cptr,cmdpos+1)) {
 539
 540                                 printf("%s",cmd_expand(cptr->c_keys[cmdpos],0));
 541                                 cmdspaces[cmdpos] = strlen(
 542                                         cmd_expand(cptr->c_keys[cmdpos],0) );
 543                                 if (cmdpos<4)
 544                                         if ((cptr->c_keys[cmdpos+1]) != 0)
 545                                                 putc(' ',stdout);
 546                                 ++cmdpos;
 547                                 }
 548                         }
 549
 550                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 551                         if (cmdmatch(cmdbuf,cptr,5)) {
 552                                 if (requires_string(cptr,cmdpos)) {
 553                                         getline(argbuf,32);
 554                                         }
 555                                 else {
 556                                         printf("\n");
 557                                         }
 558                                 return(cptr->c_cmdnum);
 559                                 }
 560                         }
 561
 562                 if (ch == '?') {
 563                         printf("\rOne of ...                         \n");
 564                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 565                             if (cmdmatch(cmdbuf,cptr,cmdpos)) {
 566                                 for (a=0; a<5; ++a) {
 567                                     printf("%s ",cmd_expand(cptr->c_keys[a],1));
 568                                     }
 569                                 printf("\n");
 570                                 }
 571                             }
 572
 573                         printf("\n%s%c ",room_name,room_prompt(room_flags));
 574                         got = 0;
 575                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 576                             if ((got==0)&&(cmdmatch(cmdbuf,cptr,cmdpos))) {
 577                                 for (a=0; a<cmdpos; ++a) {
 578                                     printf("%s ",
 579                                         cmd_expand(cptr->c_keys[a],0));
 580                                     }
 581                                 got = 1;
 582                                 }
 583                             }
 584                         }
 585
 586                 }
 587
 588         }
 589
 590
 591
 592
 593
 594 /*
 595  * set tty modes.  commands are:
 596  *
 597  * 0 - set to bbs mode, intr/quit disabled
 598  * 1 - set to bbs mode, intr/quit enabled
 599  * 2 - save current settings for later restoral
 600  * 3 - restore saved settings
 601  */
 602 #ifdef POSIX_TERMIO
 603 void sttybbs(int cmd)           /* SysV version of sttybbs() */
 604          {
 605         struct termios live;
 606         static struct termios saved_settings;
 607
 608         if ( (cmd == 0) || (cmd == 1) ) {
 609                 tcgetattr(0,&live);
 610                 live.c_iflag=ISTRIP|IXON|IXANY;
 611                 live.c_oflag=OPOST|ONLCR;
 612                 live.c_lflag=NOFLSH;
 613                 if (cmd==1) live.c_lflag=ISIG|NOFLSH;
 614
 615                 if (cmd==SB_YES_INTR) {
 616                         live.c_cc[VINTR]=NEXT_KEY;
 617                         live.c_cc[VQUIT]=STOP_KEY;
 618                         signal(SIGINT,*sighandler);
 619                         signal(SIGQUIT,*sighandler);
 620                         }
 621                 else {
 622                         signal(SIGINT,SIG_IGN);
 623                         signal(SIGQUIT,SIG_IGN);
 624                         live.c_cc[VINTR]=(-1);
 625                         live.c_cc[VQUIT]=(-1);
 626                         }
 627
 628                 /* do we even need this stuff anymore? */
 629                 /* live.c_line=0; */
 630                 live.c_cc[VERASE]=8;
 631                 live.c_cc[VKILL]=24;
 632                 live.c_cc[VEOF]=1;
 633                 live.c_cc[VEOL]=255;
 634                 live.c_cc[VEOL2]=0;
 635                 live.c_cc[VSTART]=0;
 636                 tcsetattr(0,TCSADRAIN,&live);
 637                 }
 638         if (cmd == 2) {
 639                 tcgetattr(0,&saved_settings);
 640                 }
 641         if (cmd == 3) {
 642                 tcsetattr(0,TCSADRAIN,&saved_settings);
 643                 }
 644         }
 645 #else
 646 void sttybbs(int cmd)           /* BSD version of sttybbs() */
 647 {
 648         struct sgttyb live;
 649         static struct sgttyb saved_settings;
 650
 651         if ( (cmd == 0) || (cmd == 1) ) {
 652                 gtty(0,&live);
 653                 live.sg_flags |= CBREAK;
 654                 live.sg_flags |= CRMOD;
 655                 live.sg_flags |= NL1;
 656                 live.sg_flags &= ~ECHO;
 657                 if (cmd==1) live.sg_flags |= NOFLSH;
 658                 stty(0,&live);
 659                 }
 660         if (cmd == 2) {
 661                 gtty(0,&saved_settings);
 662                 }
 663         if (cmd == 3) {
 664                 stty(0,&saved_settings);
 665                 }
 666         }
 667 #endif
 668
 669
 670 /*
 671  * display_help()  -  help file viewer
 672  */
 673 void display_help(char *name)
 674 {
 675         formout(name);
 676         }
 677
 678
 679 /*
 680  * fmout()  -  Citadel text formatter and paginator
 681  */
 682 int fmout(int width, FILE *fp, char pagin, int height, int starting_lp, char subst)
 683                         /* screen width to use */
 684                         /* file to read from, or NULL to read from server */
 685                         /* nonzero if we should use the paginator */
 686                         /* screen height to use */
 687                         /* starting value for lines_printed, -1 for global */
 688                         /* nonzero if we should use hypertext mode */
 689         {
 690         int a,b,c,d,old;
 691         int real = (-1);
 692         char aaa[140];
 693         char buffer[512];
 694         int eof_flag = 0;
 695
 696         if (starting_lp >= 0) {
 697                 lines_printed = starting_lp;
 698                 }
 699         strcpy(aaa,""); old=255;
 700         strcpy(buffer,"");
 701         c=1; /* c is the current pos */
 702
 703         sigcaught = 0;
 704         sttybbs(1);
 705
 706 FMTA:   while ( (eof_flag==0) && (strlen(buffer)<126) ) {
 707                 if (sigcaught) goto OOPS;
 708                 if (fp!=NULL) { /* read from file */
 709                         if (feof(fp)) eof_flag = 1;
 710                         if (eof_flag==0) {
 711                                 a=getc(fp);
 712                                 buffer[strlen(buffer)+1] = 0;
 713                                 buffer[strlen(buffer)] = a;
 714                                 }
 715                         }
 716                 else {          /* read from server */
 717                         d=strlen(buffer);
 718                         serv_gets(&buffer[d]);
 719 while ( (!isspace(buffer[d])) && (isspace(buffer[strlen(buffer)-1])) )
 720         buffer[strlen(buffer)-1]=0;
 721                         if (!strcmp(&buffer[d],"000")) {
 722                                 buffer[d] = 0;
 723                                 eof_flag = 1;
 724                                 while(isspace(buffer[strlen(buffer)-1]))
 725                                         buffer[strlen(buffer)-1] = 0;
 726                                 }
 727                         d=strlen(buffer);
 728                         buffer[d] = 10;
 729                         buffer[d+1] = 0;
 730                         }
 731                 }
 732
 733         buffer[strlen(buffer)+1] = 0;
 734         a=buffer[0];
 735         strcpy(buffer,&buffer[1]);
 736
 737         old=real;
 738         real=a;
 739         if (a<=0) goto FMTEND;
 740
 741         if ( ((a==13)||(a==10)) && (old!=13) && (old!=10) ) a=32;
 742         if ( ((old==13)||(old==10)) && (isspace(real)) ) {
 743                 printf("\n");
 744                 ++lines_printed;
 745                 lines_printed = checkpagin(lines_printed,pagin,height);
 746                 c=1;
 747                 }
 748         if (a>126) goto FMTA;
 749
 750         if (a>32) {
 751         if ( ((strlen(aaa)+c)>(width-5)) && (strlen(aaa)>(width-5)) ) {
 752                 printf("\n%s",aaa); c=strlen(aaa); aaa[0]=0;
 753                 ++lines_printed;
 754                 lines_printed = checkpagin(lines_printed,pagin,height);
 755                 }
 756             b=strlen(aaa); aaa[b]=a; aaa[b+1]=0;
 757             }
 758         if (a==32) {
 759                 if ((strlen(aaa)+c)>(width-5)) {
 760                         c=1;
 761                         printf("\n");
 762                         ++lines_printed;
 763                         lines_printed = checkpagin(lines_printed,pagin,height);
 764                         }
 765                 printf("%s ",aaa); ++c; c=c+strlen(aaa);
 766                 strcpy(aaa,"");
 767                 goto FMTA;
 768                 }
 769         if ((a==13)||(a==10)) {
 770                 printf("%s\n",aaa);
 771                 c=1;
 772                 ++lines_printed;
 773                 lines_printed = checkpagin(lines_printed,pagin,height);
 774                 strcpy(aaa,"");
 775                 goto FMTA;
 776                 }
 777         goto FMTA;
 778
 779         /* signal caught; drain the server */
 780 OOPS:   do {
 781                 serv_gets(aaa);
 782                 } while(strcmp(aaa,"000"));
 783
 784 FMTEND: printf("\n");
 785         ++lines_printed;
 786         lines_printed = checkpagin(lines_printed,pagin,height);
 787         return(sigcaught);
 788 }
 789
 790
 791 /*
 792  * support ANSI color if defined
 793  */
 794 void color(int colornum)
 795 {
 796
 797 #ifdef ANSI_COLOR
 798         if (enable_color) {
 799                 fflush(stdout);
 800                 printf("%c[3%dm%c[1m", 27, colornum, 27);
 801                 fflush(stdout);
 802                 }
 803 #endif
 804         }
 805
 806 void cls(void) {
 807 #ifdef ANSI_COLOR
 808         fflush(stdout);
 809         printf("%c[2J%c[H", 27, 27);
 810         fflush(stdout);
 811 #endif
 812         }
 813
 814
 815 /*
 816  * Detect whether ANSI color is available (answerback)
 817  */
 818 void send_ansi_detect(void) {
 819 #ifdef ANSI_COLOR
 820         printf("%c[c", 27);
 821         fflush(stdout);
 822         time(&AnsiDetect);
 823 #endif
 824         }
 825
 826 void look_for_ansi(void) {
 827 #ifdef ANSI_COLOR
 828         fd_set rfds;
 829         struct timeval tv;
 830         char abuf[512];
 831         time_t now;
 832         int a;
 833
 834         strcpy(abuf, "");
 835
 836         time(&now);
 837         if ( (now - AnsiDetect) < 2 ) sleep(1);
 838
 839         do {
 840                 FD_ZERO(&rfds);
 841                 FD_SET(0,&rfds);
 842                 tv.tv_sec = 0;
 843                 tv.tv_usec = 1;
 844
 845                 select(1, &rfds, NULL, NULL, &tv);
 846                 if (FD_ISSET(0, &rfds)) {
 847                         abuf[strlen(abuf)+1] = 0;
 848                         read(0, &abuf[strlen(abuf)], 1);
 849                         }
 850
 851                 } while (FD_ISSET(0, &rfds));
 852
 853         for (a=0; a<strlen(abuf); ++a) {
 854                 if ( (abuf[a] == 27) && (abuf[a+1] == '[')
 855                    && (abuf[a+2] == '?') ) {
 856                         enable_color = 1;
 857                         }
 858                 }
 859 #endif
 860         }