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