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
  35 struct citcmd {
  36         struct citcmd *next;
  37         int c_cmdnum;
  38         int c_axlevel;
  39         char c_keys[5][64];
  40         };
  41
  42 #define IFNEXPERT if ((userflags&US_EXPERT)==0)
  43
  44
  45 extern unsigned room_flags;
  46 extern char room_name[];
  47 extern struct CtdlServInfo serv_info;
  48 extern char axlevel;
  49 extern char is_room_aide;
  50 extern unsigned userflags;
  51 extern char sigcaught;
  52 extern char editor_path[];
  53 extern char printcmd[];
  54 extern char have_xterm;
  55 extern char rc_username[];
  56 extern char rc_password[];
  57 extern char rc_floor_mode;
  58 char rc_exp_beep;
  59 char rc_exp_cmd[256];
  60 extern int lines_printed;
  61 extern char express_msgs;
  62
  63 char *gl_string;
  64
  65 struct citcmd *cmdlist = NULL;
  66
  67 void sighandler();
  68 void logoff();
  69 int struncmp();
  70 void formout();
  71 int room_prompt();
  72 void back();
  73 int checkpagin();
  74 void color();
  75
  76
  77 /* these variables are local to this module */
  78 char keepalives_enabled = KA_YES;       /* send NOOPs to server when idle */
  79 int ok_to_interrupt = 0;                /* print express msgs asynchronously */
  80 time_t AnsiDetect;                      /* when did we send the detect code? */
  81 int enable_color = 0;                   /* nonzero for ANSI color */
  82
  83
  84 /*
  85  * print_express()  -  print express messages if there are any
  86  */
  87 void print_express() {
  88         char buf[256];
  89         FILE *outpipe;
  90
  91         if (express_msgs == 0) return;
  92         express_msgs = 0;
  93         serv_puts("PEXP");
  94         serv_gets(buf);
  95         if (buf[0]!='1') return;
  96
  97         if (strlen(rc_exp_cmd) > 0) {
  98                 outpipe = popen(rc_exp_cmd, "w");
  99                 if (outpipe != NULL) {
 100                         while (serv_gets(buf), strcmp(buf,"000")) {
 101                                 fprintf(outpipe, "%s\n", buf);
 102                                 }
 103                         pclose(outpipe);
 104                         return;
 105                         }
 106                 }
 107
 108         /* fall back to built-in express message display */
 109         if (rc_exp_beep) {
 110                 putc(7,stdout);
 111                 }
 112         color(1);
 113         printf("---\n");
 114         while (serv_gets(buf), strcmp(buf,"000")) {
 115                 printf("%s\n",buf);
 116                 }
 117         printf("---\n");
 118         color(7);
 119         }
 120
 121
 122 void set_keepalives(s)
 123 int s; {
 124         keepalives_enabled = (char)s;
 125         }
 126
 127 /*
 128  * This loop handles the "keepalive" messages sent to the server when idling.
 129  */
 130 void do_keepalive() {
 131         char buf[256];
 132         static long idlet = 0L;
 133         long now;
 134
 135         time(&now);
 136         if ((now - idlet) < ((long)S_KEEPALIVE)) return;
 137         time(&idlet);
 138
 139         if (keepalives_enabled != KA_NO) {
 140                 serv_puts("NOOP");
 141                 if (keepalives_enabled == KA_YES) {
 142                         serv_gets(buf);
 143                         if (buf[3]=='*') {
 144                                 express_msgs = 1;
 145                                 if (ok_to_interrupt == 1) {
 146                                         printf("\r                    \r");
 147                                         print_express();
 148                                         printf("%s%c ",room_name,
 149                                                 room_prompt(room_flags));
 150                                         fflush(stdout);
 151                                         }
 152                                 }
 153                         }
 154                 }
 155         }
 156
 157
 158 int inkey() {           /* get a character from the keyboard, with   */
 159         int a;          /* the watchdog timer in effect if necessary */
 160         fd_set rfds;
 161         struct timeval tv;
 162         long start_time, now;
 163         char inbuf[2];
 164
 165         time(&start_time);
 166
 167         do {
 168
 169                 /* This loop waits for keyboard input.  If the keepalive
 170                  * timer expires, it sends a keepalive to the server if
 171                  * necessary and then waits again.
 172                  */
 173                 do {
 174                         do_keepalive();
 175                         fflush(stdout);
 176                         FD_ZERO(&rfds);
 177                         FD_SET(0,&rfds);
 178                         tv.tv_sec = S_KEEPALIVE;
 179                         tv.tv_usec = 0;
 180
 181                         time(&now);
 182                         if (((now-start_time) > SLEEPING)
 183                            && (SLEEPING != 0) && (getppid()==1)) {
 184                                 printf("Sleeping? Call again.\n");
 185                                 logoff(SIGALRM);
 186                                 }
 187
 188                         select(1, &rfds, NULL, NULL, &tv);
 189                         } while (!FD_ISSET(0, &rfds));
 190
 191
 192
 193
 194                 /* At this point, there's input, so fetch it.
 195                  * (There's a hole in the bucket...)
 196                  */
 197                 read(0, inbuf, 1);
 198                 a = inbuf[0];
 199                 if (a==127) a=8;
 200                 if (a>126) a=0;
 201                 if (a==10) a=13;
 202                 if (((a!=4)&&(a!=13)&&(a!=8)&&(a!=NEXT_KEY)&&(a!=STOP_KEY))
 203                         && ((a<32)||(a>126))) a=0;
 204                 } while(a==0);
 205         return(a);
 206         }
 207
 208 void getline(string,lim)        /* Gets a line from the terminal */
 209 char string[];          /* Pointer to string buffer */
 210 int lim;                /* Maximum length - if negative, no-show */
 211 {
 212         int a,b;
 213         char flag = 0;
 214
 215         if (lim<0) { lim=(0-lim); flag=1; }
 216         strcpy(string,"");
 217         gl_string = string;
 218 GLA:    a=inkey(); a=(a&127);
 219         if ((a==8)&&(strlen(string)==0)) goto GLA;
 220         if ((a!=13)&&(a!=8)&&(strlen(string)==lim)) goto GLA;
 221         if ((a==8)&&(string[0]!=0)) {
 222                 string[strlen(string)-1]=0;
 223                 putc(8,stdout); putc(32,stdout); putc(8,stdout); goto GLA; }
 224         if ((a==13)||(a==10)) {
 225                 putc(13,stdout);
 226                 putc(10,stdout);
 227                 return;
 228                 }
 229         if (a<32) a='.';
 230         b=strlen(string);
 231         string[b]=a;
 232         string[b+1]=0;
 233         if (flag==0) putc(a,stdout);
 234         if (flag==1) putc('*',stdout);
 235         goto GLA;
 236         }
 237
 238
 239 /*
 240  * strprompt()  -  prompt for a string, print the existing value and
 241  *                 allow the user to press return to keep it...
 242  */
 243 void strprompt(prompt,str,len)
 244 char *prompt;
 245 char *str;
 246 int len; {
 247         char buf[128];
 248         print_express();
 249         color(3);
 250         printf("%s [", prompt);
 251         color(1);
 252         printf("%s", str);
 253         color(3);
 254         printf("]: ");
 255         color(2);
 256         getline(buf,len);
 257         color(7);
 258         if (buf[0]!=0) strcpy(str,buf);
 259         }
 260
 261 /*
 262  * intprompt()  -  like strprompt(), except for an integer
 263  *                 (note that it RETURNS the new value!)
 264  */
 265 int intprompt(prompt,ival,imin,imax)
 266 char *prompt;
 267 int ival;
 268 int imin;
 269 int imax; {
 270         char buf[16];
 271         int i;
 272         i = ival;
 273         do {
 274                 sprintf(buf,"%d",i);
 275                 strprompt(prompt,buf,15);
 276                 i=atoi(buf);
 277                 if (i<imin) printf("*** Must be no less than %d.\n",imin);
 278                 if (i>imax) printf("*** Must be no more than %d.\n",imax);
 279                 } while((i<imin)||(i>imax));
 280         return(i);
 281         }
 282
 283 /*
 284  * newprompt()  -  prompt for a string with no existing value
 285  *                 (clears out string buffer first)
 286  */
 287 void newprompt(prompt,str,len)
 288 char *prompt;
 289 char *str;
 290 int len; {
 291         color(3);
 292         printf("%s",prompt);
 293         color(2);
 294         getline(str,len);
 295         color(7);
 296         }
 297
 298
 299 int lkey() {    /* returns a lower case value */
 300         int a;
 301         a=inkey();
 302         if (isupper(a)) a=tolower(a);
 303         return(a);
 304         }
 305
 306 /*
 307  * parse the citadel.rc file
 308  */
 309 void load_command_set() {
 310         FILE *ccfile;
 311         char buf[256];
 312         struct citcmd *cptr;
 313         int a,d;
 314         int b = 0;
 315
 316
 317         /* first, set up some defaults for non-required variables */
 318
 319         strcpy(editor_path,"");
 320         strcpy(printcmd,"");
 321         strcpy(rc_username,"");
 322         strcpy(rc_password,"");
 323         rc_floor_mode = 0;
 324         rc_exp_beep = 1;
 325         strcpy(rc_exp_cmd, "");
 326
 327         /* now try to open the citadel.rc file */
 328
 329         ccfile = NULL;
 330         if (getenv("HOME") != NULL) {
 331                 sprintf(buf,"%s/.citadelrc",getenv("HOME"));
 332                 ccfile = fopen(buf,"r");
 333                 }
 334         if (ccfile==NULL) {
 335                 ccfile = fopen("/usr/local/lib/citadel.rc","r");
 336                 }
 337         if (ccfile==NULL) {
 338                 sprintf(buf,"%s/citadel.rc",BBSDIR);
 339                 ccfile = fopen(buf,"r");
 340                 }
 341         if (ccfile==NULL) {
 342                 perror("commands: cannot open citadel.rc");
 343                 logoff(errno);
 344                 }
 345
 346         while (fgets(buf, 256, ccfile) != NULL) {
 347             while ( (strlen(buf)>0) ? (isspace(buf[strlen(buf)-1])) : 0 )
 348                 buf[strlen(buf)-1] = 0;
 349
 350             if (!struncmp(buf,"editor=",7))
 351                 strcpy(editor_path,&buf[7]);
 352
 353             if (!struncmp(buf,"printcmd=",9))
 354                 strcpy(printcmd,&buf[9]);
 355
 356             if (!struncmp(buf,"expcmd=",7))
 357                 strcpy(rc_exp_cmd,&buf[7]);
 358
 359             if (!struncmp(buf,"local_screen_dimensions=",24))
 360                 have_xterm = (char)atoi(&buf[24]);
 361
 362             if (!struncmp(buf,"use_floors=",11)) {
 363                 if (!strucmp(&buf[11],"yes")) rc_floor_mode = RC_YES;
 364                 if (!strucmp(&buf[11],"no")) rc_floor_mode = RC_NO;
 365                 if (!strucmp(&buf[11],"default")) rc_floor_mode = RC_DEFAULT;
 366                 }
 367
 368             if (!struncmp(buf,"beep=",5)) {
 369                 rc_exp_beep = atoi(&buf[5]);
 370                 }
 371
 372             if (!struncmp(buf,"username=",9))
 373                 strcpy(rc_username,&buf[9]);
 374
 375             if (!struncmp(buf,"password=",9))
 376                 strcpy(rc_password,&buf[9]);
 377
 378             if (!struncmp(buf,"cmd=",4)) {
 379                 strcpy(buf,&buf[4]);
 380
 381                 cptr = (struct citcmd *) malloc (sizeof(struct citcmd));
 382
 383                 cptr->c_cmdnum = atoi (buf);
 384                 for (d=strlen(buf); d>=0; --d)
 385                         if (buf[d]==',') b=d;
 386                 strcpy (buf, &buf[b+1]);
 387
 388                 cptr->c_axlevel = atoi (buf);
 389                 for (d=strlen(buf); d>=0; --d)
 390                         if (buf[d]==',') b=d;
 391                 strcpy (buf, &buf[b+1]);
 392
 393                 for (a=0; a<5; ++a) cptr->c_keys[a][0] = 0;
 394
 395                 a = 0;  b = 0;
 396                 buf[strlen(buf)+1] = 0;
 397                 while (strlen(buf) > 0) {
 398                         b = strlen(buf);
 399                         for (d=strlen(buf); d>=0; --d)
 400                                 if (buf[d]==',') b=d;
 401                         strncpy(cptr->c_keys[a],buf,b);
 402                         cptr->c_keys[a][b] = 0;
 403                         if (buf[b]==',')
 404                                 strcpy(buf,&buf[b+1]);
 405                         else
 406                                 strcpy(buf,"");
 407                         ++a;
 408                         }
 409
 410                 cptr->next = cmdlist;
 411                 cmdlist = cptr;
 412
 413                 }
 414             }
 415         fclose(ccfile);
 416         }
 417
 418
 419
 420 /*
 421  * return the key associated with a command
 422  */
 423 char keycmd(cmdstr)
 424 char cmdstr[]; {
 425         int a;
 426
 427         for (a=0; a<strlen(cmdstr); ++a)
 428                 if (cmdstr[a]=='&')
 429                         return(tolower(cmdstr[a+1]));
 430         return(0);
 431         }
 432
 433
 434 /*
 435  * Output the string from a key command without the ampersand
 436  * "mode" should be set to 0 for normal or 1 for <C>ommand key highlighting
 437  */
 438 char *cmd_expand(strbuf,mode)
 439 char strbuf[];
 440 int mode; {
 441         int a;
 442         static char exp[64];
 443         char buf[256];
 444
 445         strcpy(exp,strbuf);
 446
 447         for (a=0; a<strlen(exp); ++a) {
 448                 if (strbuf[a] == '&') {
 449
 450                     if (mode == 0) {
 451                         strcpy(&exp[a],&exp[a+1]);
 452                         }
 453
 454                     if (mode == 1) {
 455                         exp[a] = '<';
 456                         strcpy(buf,&exp[a+2]);
 457                         exp[a+2] = '>';
 458                         exp[a+3] = 0;
 459                         strcat(exp,buf);
 460                         }
 461
 462                     }
 463
 464                 if (!strncmp(&exp[a],"^r",2)) {
 465                         strcpy(buf,exp);
 466                         strcpy(&exp[a],room_name);
 467                         strcat(exp,&buf[a+2]);
 468                         }
 469
 470                 if (!strncmp(&exp[a],"^c",2)) {
 471                         exp[a] = ',';
 472                         strcpy(&exp[a+1],&exp[a+2]);
 473                         }
 474
 475                 }
 476
 477         return(exp);
 478         }
 479
 480
 481
 482 /*
 483  * Comparison function to determine if entered commands match a
 484  * command loaded from the config file.
 485  */
 486 int cmdmatch(cmdbuf,cptr,ncomp)
 487 char cmdbuf[];
 488 struct citcmd *cptr;
 489 int ncomp; {
 490         int a;
 491         int cmdax;
 492
 493         cmdax = 0;
 494         if (is_room_aide) cmdax = 1;
 495         if (axlevel >=6) cmdax = 2;
 496
 497         for (a=0; a<ncomp; ++a) {
 498                 if ( (tolower(cmdbuf[a]) != keycmd(cptr->c_keys[a]))
 499                    || (cptr->c_axlevel > cmdax) )
 500                         return(0);
 501                 }
 502         return(1);
 503         }
 504
 505
 506 /*
 507  * This function returns 1 if a given command requires a string input
 508  */
 509 int requires_string(cptr,ncomp)
 510 struct citcmd *cptr;
 511 int ncomp; {
 512         int a;
 513         char buf[64];
 514
 515         strcpy(buf,cptr->c_keys[ncomp-1]);
 516         for (a=0; a<strlen(buf); ++a) {
 517                 if (buf[a]==':') return(1);
 518                 }
 519         return(0);
 520         }
 521
 522
 523 /*
 524  * Input a command at the main prompt.
 525  * This function returns an integer command number.  If the command prompts
 526  * for a string then it is placed in the supplied buffer.
 527  */
 528 int getcmd(argbuf)
 529 char *argbuf;  {
 530         char cmdbuf[5];
 531         int cmdspaces[5];
 532         int cmdpos;
 533         int ch;
 534         int a;
 535         int got;
 536         struct citcmd *cptr;
 537
 538         /* if we're running in idiot mode, display a cute little menu */
 539         IFNEXPERT formout("mainmenu");
 540
 541         print_express(); /* print express messages if there are any */
 542         strcpy(argbuf, "");
 543         cmdpos = 0;
 544         for (a=0; a<5; ++a) cmdbuf[a]=0;
 545         /* now the room prompt... */
 546         ok_to_interrupt = 1;
 547         printf("\n%s%c ",room_name,room_prompt(room_flags));
 548         fflush(stdout);
 549
 550         while(1) {
 551                 ch = inkey();
 552                 ok_to_interrupt = 0;
 553
 554                 if ( (ch == 8) && (cmdpos > 0) ) {
 555                         back(cmdspaces[cmdpos-1] + 1);
 556                         cmdbuf[cmdpos] = 0;
 557                         --cmdpos;
 558                         }
 559
 560                 cmdbuf[cmdpos] = tolower(ch);
 561
 562                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 563                         if (cmdmatch(cmdbuf,cptr,cmdpos+1)) {
 564
 565                                 printf("%s",cmd_expand(cptr->c_keys[cmdpos],0));
 566                                 cmdspaces[cmdpos] = strlen(
 567                                         cmd_expand(cptr->c_keys[cmdpos],0) );
 568                                 if (cmdpos<4)
 569                                         if ((cptr->c_keys[cmdpos+1]) != 0)
 570                                                 putc(' ',stdout);
 571                                 ++cmdpos;
 572                                 }
 573                         }
 574
 575                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 576                         if (cmdmatch(cmdbuf,cptr,5)) {
 577                                 if (requires_string(cptr,cmdpos)) {
 578                                         getline(argbuf,32);
 579                                         }
 580                                 else {
 581                                         printf("\n");
 582                                         }
 583                                 return(cptr->c_cmdnum);
 584                                 }
 585                         }
 586
 587                 if (ch == '?') {
 588                         printf("\rOne of ...                         \n");
 589                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 590                             if (cmdmatch(cmdbuf,cptr,cmdpos)) {
 591                                 for (a=0; a<5; ++a) {
 592                                     printf("%s ",cmd_expand(cptr->c_keys[a],1));
 593                                     }
 594                                 printf("\n");
 595                                 }
 596                             }
 597
 598                         printf("\n%s%c ",room_name,room_prompt(room_flags));
 599                         got = 0;
 600                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 601                             if ((got==0)&&(cmdmatch(cmdbuf,cptr,cmdpos))) {
 602                                 for (a=0; a<cmdpos; ++a) {
 603                                     printf("%s ",
 604                                         cmd_expand(cptr->c_keys[a],0));
 605                                     }
 606                                 got = 1;
 607                                 }
 608                             }
 609                         }
 610
 611                 }
 612
 613         }
 614
 615
 616
 617
 618
 619 /*
 620  * set tty modes.  commands are:
 621  *
 622  * 0 - set to bbs mode, intr/quit disabled
 623  * 1 - set to bbs mode, intr/quit enabled
 624  * 2 - save current settings for later restoral
 625  * 3 - restore saved settings
 626  */
 627 #ifdef POSIX_TERMIO
 628 void sttybbs(cmd)               /* SysV version of sttybbs() */
 629 int cmd; {
 630         struct termios live;
 631         static struct termios saved_settings;
 632
 633         if ( (cmd == 0) || (cmd == 1) ) {
 634                 tcgetattr(0,&live);
 635                 live.c_iflag=ISTRIP|IXON|IXANY;
 636                 live.c_oflag=OPOST|ONLCR;
 637                 live.c_lflag=NOFLSH;
 638                 if (cmd==1) live.c_lflag=ISIG|NOFLSH;
 639
 640                 if (cmd==SB_YES_INTR) {
 641                         live.c_cc[VINTR]=NEXT_KEY;
 642                         live.c_cc[VQUIT]=STOP_KEY;
 643                         signal(SIGINT,*sighandler);
 644                         signal(SIGQUIT,*sighandler);
 645                         }
 646                 else {
 647                         signal(SIGINT,SIG_IGN);
 648                         signal(SIGQUIT,SIG_IGN);
 649                         live.c_cc[VINTR]=(-1);
 650                         live.c_cc[VQUIT]=(-1);
 651                         }
 652
 653                 /* do we even need this stuff anymore? */
 654                 /* live.c_line=0; */
 655                 live.c_cc[VERASE]=8;
 656                 live.c_cc[VKILL]=24;
 657                 live.c_cc[VEOF]=1;
 658                 live.c_cc[VEOL]=255;
 659                 live.c_cc[VEOL2]=0;
 660                 live.c_cc[VSTART]=0;
 661                 tcsetattr(0,TCSADRAIN,&live);
 662                 }
 663         if (cmd == 2) {
 664                 tcgetattr(0,&saved_settings);
 665                 }
 666         if (cmd == 3) {
 667                 tcsetattr(0,TCSADRAIN,&saved_settings);
 668                 }
 669         }
 670 #else
 671 void sttybbs(cmd)               /* BSD version of sttybbs() */
 672 int cmd; {
 673         struct sgttyb live;
 674         static struct sgttyb saved_settings;
 675
 676         if ( (cmd == 0) || (cmd == 1) ) {
 677                 gtty(0,&live);
 678                 live.sg_flags |= CBREAK;
 679                 live.sg_flags |= CRMOD;
 680                 live.sg_flags |= NL1;
 681                 live.sg_flags &= ~ECHO;
 682                 if (cmd==1) live.sg_flags |= NOFLSH;
 683                 stty(0,&live);
 684                 }
 685         if (cmd == 2) {
 686                 gtty(0,&saved_settings);
 687                 }
 688         if (cmd == 3) {
 689                 stty(0,&saved_settings);
 690                 }
 691         }
 692 #endif
 693
 694
 695 /*
 696  * display_help()  -  help file viewer
 697  */
 698 void display_help(name)
 699 char name[]; {
 700         formout(name);
 701         }
 702
 703
 704 /*
 705  * fmout()  -  Citadel text formatter and paginator
 706  */
 707 int fmout(width,fp,pagin,height,starting_lp,subst)
 708 int width;              /* screen width to use */
 709 FILE *fp;               /* file to read from, or NULL to read from server */
 710 char pagin;             /* nonzero if we should use the paginator */
 711 int height;             /* screen height to use */
 712 int starting_lp;        /* starting value for lines_printed, -1 for global */
 713 char subst;             /* nonzero if we should use hypertext mode */
 714         {
 715         int a,b,c,d,old;
 716         int real = (-1);
 717         char aaa[140];
 718         char buffer[512];
 719         int eof_flag = 0;
 720
 721         if (starting_lp >= 0) {
 722                 lines_printed = starting_lp;
 723                 }
 724         strcpy(aaa,""); old=255;
 725         strcpy(buffer,"");
 726         c=1; /* c is the current pos */
 727
 728         sigcaught = 0;
 729         sttybbs(1);
 730
 731 FMTA:   while ( (eof_flag==0) && (strlen(buffer)<126) ) {
 732                 if (sigcaught) goto OOPS;
 733                 if (fp!=NULL) { /* read from file */
 734                         if (feof(fp)) eof_flag = 1;
 735                         if (eof_flag==0) {
 736                                 a=getc(fp);
 737                                 buffer[strlen(buffer)+1] = 0;
 738                                 buffer[strlen(buffer)] = a;
 739                                 }
 740                         }
 741                 else {          /* read from server */
 742                         d=strlen(buffer);
 743                         serv_gets(&buffer[d]);
 744 while ( (!isspace(buffer[d])) && (isspace(buffer[strlen(buffer)-1])) )
 745         buffer[strlen(buffer)-1]=0;
 746                         if (!strcmp(&buffer[d],"000")) {
 747                                 buffer[d] = 0;
 748                                 eof_flag = 1;
 749                                 while(isspace(buffer[strlen(buffer)-1]))
 750                                         buffer[strlen(buffer)-1] = 0;
 751                                 }
 752                         d=strlen(buffer);
 753                         buffer[d] = 10;
 754                         buffer[d+1] = 0;
 755                         }
 756                 }
 757
 758         buffer[strlen(buffer)+1] = 0;
 759         a=buffer[0];
 760         strcpy(buffer,&buffer[1]);
 761
 762         old=real;
 763         real=a;
 764         if (a<=0) goto FMTEND;
 765
 766         if ( ((a==13)||(a==10)) && (old!=13) && (old!=10) ) a=32;
 767         if ( ((old==13)||(old==10)) && (isspace(real)) ) {
 768                 printf("\n");
 769                 ++lines_printed;
 770                 lines_printed = checkpagin(lines_printed,pagin,height);
 771                 c=1;
 772                 }
 773         if (a>126) goto FMTA;
 774
 775         if (a>32) {
 776         if ( ((strlen(aaa)+c)>(width-5)) && (strlen(aaa)>(width-5)) ) {
 777                 printf("\n%s",aaa); c=strlen(aaa); aaa[0]=0;
 778                 ++lines_printed;
 779                 lines_printed = checkpagin(lines_printed,pagin,height);
 780                 }
 781             b=strlen(aaa); aaa[b]=a; aaa[b+1]=0;
 782             }
 783         if (a==32) {
 784                 if ((strlen(aaa)+c)>(width-5)) {
 785                         c=1;
 786                         printf("\n");
 787                         ++lines_printed;
 788                         lines_printed = checkpagin(lines_printed,pagin,height);
 789                         }
 790                 printf("%s ",aaa); ++c; c=c+strlen(aaa);
 791                 strcpy(aaa,"");
 792                 goto FMTA;
 793                 }
 794         if ((a==13)||(a==10)) {
 795                 printf("%s\n",aaa);
 796                 c=1;
 797                 ++lines_printed;
 798                 lines_printed = checkpagin(lines_printed,pagin,height);
 799                 strcpy(aaa,"");
 800                 goto FMTA;
 801                 }
 802         goto FMTA;
 803
 804         /* signal caught; drain the server */
 805 OOPS:   do {
 806                 serv_gets(aaa);
 807                 } while(strcmp(aaa,"000"));
 808
 809 FMTEND: printf("\n");
 810         ++lines_printed;
 811         lines_printed = checkpagin(lines_printed,pagin,height);
 812         return(sigcaught);
 813 }
 814
 815
 816 /*
 817  * support ANSI color if defined
 818  */
 819 void color(colornum)
 820 int colornum;  {
 821
 822 #ifdef ANSI_COLOR
 823         if (enable_color) {
 824                 fflush(stdout);
 825                 printf("%c[3%dm%c[1m", 27, colornum, 27);
 826                 fflush(stdout);
 827                 }
 828 #endif
 829         }
 830
 831 void cls() {
 832 #ifdef ANSI_COLOR
 833         fflush(stdout);
 834         printf("%c[2J%c[H", 27, 27);
 835         fflush(stdout);
 836 #endif
 837         }
 838
 839
 840 /*
 841  * Detect whether ANSI color is available (answerback)
 842  */
 843 void send_ansi_detect() {
 844 #ifdef ANSI_COLOR
 845         printf("%c[c", 27);
 846         fflush(stdout);
 847         time(&AnsiDetect);
 848 #endif
 849         }
 850
 851 void look_for_ansi() {
 852 #ifdef ANSI_COLOR
 853         fd_set rfds;
 854         struct timeval tv;
 855         char abuf[512];
 856         time_t now;
 857         int a;
 858
 859         strcpy(abuf, "");
 860
 861         time(&now);
 862         if ( (now - AnsiDetect) < 2 ) sleep(1);
 863
 864         do {
 865                 FD_ZERO(&rfds);
 866                 FD_SET(0,&rfds);
 867                 tv.tv_sec = 0;
 868                 tv.tv_usec = 1;
 869
 870                 select(1, &rfds, NULL, NULL, &tv);
 871                 if (FD_ISSET(0, &rfds)) {
 872                         abuf[strlen(abuf)+1] = 0;
 873                         read(0, &abuf[strlen(abuf)], 1);
 874                         }
 875
 876                 } while (FD_ISSET(0, &rfds));
 877
 878         for (a=0; a<strlen(abuf); ++a) {
 879                 if ( (abuf[a] == 27) && (abuf[a+1] == '[')
 880                    && (abuf[a+2] == '?') ) {
 881                         enable_color = 1;
 882                         }
 883                 }
 884 #endif
 885         }