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