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 HAVE_TERMIOS_H
  21 #include <termios.h>
  22 #else
  23 #include <sgtty.h>
  24 #endif
  25
  26 #ifdef HAVE_SYS_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 int rc_display_message_numbers;
  54
  55 char *gl_string;
  56
  57 struct citcmd *cmdlist = NULL;
  58
  59
  60 /* these variables are local to this module */
  61 char keepalives_enabled = KA_YES;       /* send NOOPs to server when idle */
  62 int ok_to_interrupt = 0;                /* print express msgs asynchronously */
  63 time_t AnsiDetect;                      /* when did we send the detect code? */
  64 int enable_color = 0;                   /* nonzero for ANSI color */
  65
  66
  67 /*
  68  * print_express()  -  print express messages if there are any
  69  */
  70 void print_express(void) {
  71         char buf[256];
  72         FILE *outpipe;
  73
  74         if (express_msgs == 0) return;
  75         express_msgs = 0;
  76         serv_puts("PEXP");
  77         serv_gets(buf);
  78         if (buf[0]!='1') return;
  79
  80         if (strlen(rc_exp_cmd) > 0) {
  81                 outpipe = popen(rc_exp_cmd, "w");
  82                 if (outpipe != NULL) {
  83                         while (serv_gets(buf), strcmp(buf,"000")) {
  84                                 fprintf(outpipe, "%s\n", buf);
  85                                 }
  86                         pclose(outpipe);
  87                         return;
  88                         }
  89                 }
  90
  91         /* fall back to built-in express message display */
  92         if (rc_exp_beep) {
  93                 putc(7,stdout);
  94                 }
  95         color(1);
  96         printf("---\n");
  97         while (serv_gets(buf), strcmp(buf,"000")) {
  98                 printf("%s\n",buf);
  99                 }
 100         printf("---\n");
 101         color(7);
 102         }
 103
 104
 105 void set_keepalives(int s)
 106 {
 107         keepalives_enabled = (char)s;
 108         }
 109
 110 /*
 111  * This loop handles the "keepalive" messages sent to the server when idling.
 112  */
 113 void do_keepalive(void) {
 114         char buf[256];
 115         static time_t idlet = 0;
 116         time_t now;
 117
 118         time(&now);
 119         if ((now - idlet) < ((long)S_KEEPALIVE)) return;
 120         time(&idlet);
 121
 122         if (keepalives_enabled != KA_NO) {
 123                 serv_puts("NOOP");
 124                 if (keepalives_enabled == KA_YES) {
 125                         serv_gets(buf);
 126                         if (buf[3]=='*') {
 127                                 express_msgs = 1;
 128                                 if (ok_to_interrupt == 1) {
 129                                         printf("\r                    \r");
 130                                         print_express();
 131                                         printf("%s%c ",room_name,
 132                                                 room_prompt(room_flags));
 133                                         fflush(stdout);
 134                                         }
 135                                 }
 136                         }
 137                 }
 138         }
 139
 140
 141 int inkey(void) {               /* get a character from the keyboard, with   */
 142         int a;          /* the watchdog timer in effect if necessary */
 143         fd_set rfds;
 144         struct timeval tv;
 145         time_t start_time, now;
 146         char inbuf[2];
 147
 148         time(&start_time);
 149
 150         do {
 151
 152                 /* This loop waits for keyboard input.  If the keepalive
 153                  * timer expires, it sends a keepalive to the server if
 154                  * necessary and then waits again.
 155                  */
 156                 do {
 157                         do_keepalive();
 158                         fflush(stdout);
 159                         FD_ZERO(&rfds);
 160                         FD_SET(0,&rfds);
 161                         tv.tv_sec = S_KEEPALIVE;
 162                         tv.tv_usec = 0;
 163
 164                         time(&now);
 165                         if (((now-start_time) > SLEEPING)
 166                            && (SLEEPING != 0) && (getppid()==1)) {
 167                                 printf("Sleeping? Call again.\n");
 168                                 logoff(SIGALRM);
 169                                 }
 170
 171                         select(1, &rfds, NULL, NULL, &tv);
 172                         } while (!FD_ISSET(0, &rfds));
 173
 174
 175
 176
 177                 /* At this point, there's input, so fetch it.
 178                  * (There's a hole in the bucket...)
 179                  */
 180                 read(0, inbuf, 1);
 181                 a = inbuf[0];
 182                 if (a==127) a=8;
 183                 if (a>126) a=0;
 184                 if (a==10) a=13;
 185                 if (((a!=4)&&(a!=13)&&(a!=8)&&(a!=NEXT_KEY)&&(a!=STOP_KEY))
 186                         && ((a<32)||(a>126))) a=0;
 187                 } while(a==0);
 188         return(a);
 189         }
 190
 191 void getline(char *string, int lim)     /* Gets a line from the terminal */
 192                         /* Pointer to string buffer */
 193                         /* Maximum length - if negative, no-show */
 194 {
 195         int a,b;
 196         char flag = 0;
 197
 198         if (lim<0) { lim=(0-lim); flag=1; }
 199         strcpy(string,"");
 200         gl_string = string;
 201 GLA:    a=inkey(); a=(a&127);
 202         if ((a==8)&&(strlen(string)==0)) goto GLA;
 203         if ((a!=13)&&(a!=8)&&(strlen(string)==lim)) goto GLA;
 204         if ((a==8)&&(string[0]!=0)) {
 205                 string[strlen(string)-1]=0;
 206                 putc(8,stdout); putc(32,stdout); putc(8,stdout); goto GLA; }
 207         if ((a==13)||(a==10)) {
 208                 putc(13,stdout);
 209                 putc(10,stdout);
 210                 return;
 211                 }
 212         if (a<32) a='.';
 213         b=strlen(string);
 214         string[b]=a;
 215         string[b+1]=0;
 216         if (flag==0) putc(a,stdout);
 217         if (flag==1) putc('*',stdout);
 218         goto GLA;
 219         }
 220
 221
 222 /*
 223  * strprompt()  -  prompt for a string, print the existing value and
 224  *                 allow the user to press return to keep it...
 225  */
 226 void strprompt(char *prompt, char *str, int len)
 227 {
 228         char buf[128];
 229         print_express();
 230         color(3);
 231         printf("%s [", prompt);
 232         color(1);
 233         printf("%s", str);
 234         color(3);
 235         printf("]: ");
 236         color(2);
 237         getline(buf,len);
 238         color(7);
 239         if (buf[0]!=0) strcpy(str,buf);
 240         }
 241
 242 /*
 243  * intprompt()  -  like strprompt(), except for an integer
 244  *                 (note that it RETURNS the new value!)
 245  */
 246 int intprompt(char *prompt, int ival, int imin, int imax)
 247 {
 248         char buf[16];
 249         int i;
 250         i = ival;
 251         do {
 252                 sprintf(buf,"%d",i);
 253                 strprompt(prompt,buf,15);
 254                 i=atoi(buf);
 255                 if (i<imin) printf("*** Must be no less than %d.\n",imin);
 256                 if (i>imax) printf("*** Must be no more than %d.\n",imax);
 257                 } while((i<imin)||(i>imax));
 258         return(i);
 259         }
 260
 261 /*
 262  * newprompt()  -  prompt for a string with no existing value
 263  *                 (clears out string buffer first)
 264  */
 265 void newprompt(char *prompt, char *str, int len)
 266 {
 267         color(3);
 268         printf("%s",prompt);
 269         color(2);
 270         getline(str,len);
 271         color(7);
 272         }
 273
 274
 275 int lkey(void) {        /* returns a lower case value */
 276         int a;
 277         a=inkey();
 278         if (isupper(a)) a=tolower(a);
 279         return(a);
 280         }
 281
 282 /*
 283  * parse the citadel.rc file
 284  */
 285 void load_command_set(void) {
 286         FILE *ccfile;
 287         char buf[256];
 288         struct citcmd *cptr;
 289         int a,d;
 290         int b = 0;
 291
 292
 293         /* first, set up some defaults for non-required variables */
 294
 295         strcpy(editor_path,"");
 296         strcpy(printcmd,"");
 297         strcpy(rc_username,"");
 298         strcpy(rc_password,"");
 299         rc_floor_mode = 0;
 300         rc_exp_beep = 1;
 301         rc_allow_attachments = 0;
 302         strcpy(rc_exp_cmd, "");
 303         rc_display_message_numbers = 0;
 304
 305         /* now try to open the citadel.rc file */
 306
 307         ccfile = NULL;
 308         if (getenv("HOME") != NULL) {
 309                 sprintf(buf,"%s/.citadelrc",getenv("HOME"));
 310                 ccfile = fopen(buf,"r");
 311                 }
 312         if (ccfile==NULL) {
 313                 ccfile = fopen("/usr/local/lib/citadel.rc","r");
 314                 }
 315         if (ccfile==NULL) {
 316                 sprintf(buf,"%s/citadel.rc",BBSDIR);
 317                 ccfile = fopen(buf,"r");
 318                 }
 319         if (ccfile==NULL) {
 320                 perror("commands: cannot open citadel.rc");
 321                 logoff(errno);
 322                 }
 323
 324         while (fgets(buf, 256, ccfile) != NULL) {
 325             while ( (strlen(buf)>0) ? (isspace(buf[strlen(buf)-1])) : 0 )
 326                 buf[strlen(buf)-1] = 0;
 327
 328             if (!struncmp(buf,"editor=",7))
 329                 strcpy(editor_path,&buf[7]);
 330
 331             if (!struncmp(buf,"printcmd=",9))
 332                 strcpy(printcmd,&buf[9]);
 333
 334             if (!struncmp(buf,"expcmd=",7))
 335                 strcpy(rc_exp_cmd,&buf[7]);
 336
 337             if (!struncmp(buf,"local_screen_dimensions=",24))
 338                 have_xterm = (char)atoi(&buf[24]);
 339
 340             if (!struncmp(buf,"use_floors=",11)) {
 341                 if (!strucmp(&buf[11],"yes")) rc_floor_mode = RC_YES;
 342                 if (!strucmp(&buf[11],"no")) rc_floor_mode = RC_NO;
 343                 if (!strucmp(&buf[11],"default")) rc_floor_mode = RC_DEFAULT;
 344                 }
 345
 346             if (!struncmp(buf,"beep=",5)) {
 347                 rc_exp_beep = atoi(&buf[5]);
 348                 }
 349
 350             if (!struncmp(buf,"allow_attachments=", 18)) {
 351                 rc_allow_attachments = atoi(&buf[18]);
 352                 }
 353
 354             if (!struncmp(buf,"display_message_numbers=", 24)) {
 355                 rc_display_message_numbers = atoi(&buf[24]);
 356                 }
 357
 358             if (!struncmp(buf,"username=",9))
 359                 strcpy(rc_username,&buf[9]);
 360
 361             if (!struncmp(buf,"password=",9))
 362                 strcpy(rc_password,&buf[9]);
 363
 364             if (!struncmp(buf,"cmd=",4)) {
 365                 strcpy(buf,&buf[4]);
 366
 367                 cptr = (struct citcmd *) malloc (sizeof(struct citcmd));
 368
 369                 cptr->c_cmdnum = atoi (buf);
 370                 for (d=strlen(buf); d>=0; --d)
 371                         if (buf[d]==',') b=d;
 372                 strcpy (buf, &buf[b+1]);
 373
 374                 cptr->c_axlevel = atoi (buf);
 375                 for (d=strlen(buf); d>=0; --d)
 376                         if (buf[d]==',') b=d;
 377                 strcpy (buf, &buf[b+1]);
 378
 379                 for (a=0; a<5; ++a) cptr->c_keys[a][0] = 0;
 380
 381                 a = 0;  b = 0;
 382                 buf[strlen(buf)+1] = 0;
 383                 while (strlen(buf) > 0) {
 384                         b = strlen(buf);
 385                         for (d=strlen(buf); d>=0; --d)
 386                                 if (buf[d]==',') b=d;
 387                         strncpy(cptr->c_keys[a],buf,b);
 388                         cptr->c_keys[a][b] = 0;
 389                         if (buf[b]==',')
 390                                 strcpy(buf,&buf[b+1]);
 391                         else
 392                                 strcpy(buf,"");
 393                         ++a;
 394                         }
 395
 396                 cptr->next = cmdlist;
 397                 cmdlist = cptr;
 398
 399                 }
 400             }
 401         fclose(ccfile);
 402         }
 403
 404
 405
 406 /*
 407  * return the key associated with a command
 408  */
 409 char keycmd(char *cmdstr)
 410 {
 411         int a;
 412
 413         for (a=0; a<strlen(cmdstr); ++a)
 414                 if (cmdstr[a]=='&')
 415                         return(tolower(cmdstr[a+1]));
 416         return(0);
 417         }
 418
 419
 420 /*
 421  * Output the string from a key command without the ampersand
 422  * "mode" should be set to 0 for normal or 1 for <C>ommand key highlighting
 423  */
 424 char *cmd_expand(char *strbuf, int mode)
 425 {
 426         int a;
 427         static char exp[64];
 428         char buf[256];
 429
 430         strcpy(exp,strbuf);
 431
 432         for (a=0; a<strlen(exp); ++a) {
 433                 if (strbuf[a] == '&') {
 434
 435                     if (mode == 0) {
 436                         strcpy(&exp[a],&exp[a+1]);
 437                         }
 438
 439                     if (mode == 1) {
 440                         exp[a] = '<';
 441                         strcpy(buf,&exp[a+2]);
 442                         exp[a+2] = '>';
 443                         exp[a+3] = 0;
 444                         strcat(exp,buf);
 445                         }
 446
 447                     }
 448
 449                 if (!strncmp(&exp[a],"^r",2)) {
 450                         strcpy(buf,exp);
 451                         strcpy(&exp[a],room_name);
 452                         strcat(exp,&buf[a+2]);
 453                         }
 454
 455                 if (!strncmp(&exp[a],"^c",2)) {
 456                         exp[a] = ',';
 457                         strcpy(&exp[a+1],&exp[a+2]);
 458                         }
 459
 460                 }
 461
 462         return(exp);
 463         }
 464
 465
 466
 467 /*
 468  * Comparison function to determine if entered commands match a
 469  * command loaded from the config file.
 470  */
 471 int cmdmatch(char *cmdbuf, struct citcmd *cptr, int ncomp)
 472 {
 473         int a;
 474         int cmdax;
 475
 476         cmdax = 0;
 477         if (is_room_aide) cmdax = 1;
 478         if (axlevel >=6) cmdax = 2;
 479
 480         for (a=0; a<ncomp; ++a) {
 481                 if ( (tolower(cmdbuf[a]) != keycmd(cptr->c_keys[a]))
 482                    || (cptr->c_axlevel > cmdax) )
 483                         return(0);
 484                 }
 485         return(1);
 486         }
 487
 488
 489 /*
 490  * This function returns 1 if a given command requires a string input
 491  */
 492 int requires_string(struct citcmd *cptr, int ncomp)
 493 {
 494         int a;
 495         char buf[64];
 496
 497         strcpy(buf,cptr->c_keys[ncomp-1]);
 498         for (a=0; a<strlen(buf); ++a) {
 499                 if (buf[a]==':') return(1);
 500                 }
 501         return(0);
 502         }
 503
 504
 505 /*
 506  * Input a command at the main prompt.
 507  * This function returns an integer command number.  If the command prompts
 508  * for a string then it is placed in the supplied buffer.
 509  */
 510 int getcmd(char *argbuf)
 511 {
 512         char cmdbuf[5];
 513         int cmdspaces[5];
 514         int cmdpos;
 515         int ch;
 516         int a;
 517         int got;
 518         struct citcmd *cptr;
 519
 520         /* if we're running in idiot mode, display a cute little menu */
 521         IFNEXPERT formout("mainmenu");
 522
 523         print_express(); /* print express messages if there are any */
 524         strcpy(argbuf, "");
 525         cmdpos = 0;
 526         for (a=0; a<5; ++a) cmdbuf[a]=0;
 527         /* now the room prompt... */
 528         ok_to_interrupt = 1;
 529         printf("\n%s%c ",room_name,room_prompt(room_flags));
 530         fflush(stdout);
 531
 532         while(1) {
 533                 ch = inkey();
 534                 ok_to_interrupt = 0;
 535
 536                 if ( (ch == 8) && (cmdpos > 0) ) {
 537                         back(cmdspaces[cmdpos-1] + 1);
 538                         cmdbuf[cmdpos] = 0;
 539                         --cmdpos;
 540                         }
 541
 542                 cmdbuf[cmdpos] = tolower(ch);
 543
 544                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 545                         if (cmdmatch(cmdbuf,cptr,cmdpos+1)) {
 546
 547                                 printf("%s",cmd_expand(cptr->c_keys[cmdpos],0));
 548                                 cmdspaces[cmdpos] = strlen(
 549                                         cmd_expand(cptr->c_keys[cmdpos],0) );
 550                                 if (cmdpos<4)
 551                                         if ((cptr->c_keys[cmdpos+1]) != 0)
 552                                                 putc(' ',stdout);
 553                                 ++cmdpos;
 554                                 }
 555                         }
 556
 557                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 558                         if (cmdmatch(cmdbuf,cptr,5)) {
 559                                 if (requires_string(cptr,cmdpos)) {
 560                                         getline(argbuf,32);
 561                                         }
 562                                 else {
 563                                         printf("\n");
 564                                         }
 565                                 return(cptr->c_cmdnum);
 566                                 }
 567                         }
 568
 569                 if (ch == '?') {
 570                         printf("\rOne of ...                         \n");
 571                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 572                             if (cmdmatch(cmdbuf,cptr,cmdpos)) {
 573                                 for (a=0; a<5; ++a) {
 574                                     printf("%s ",cmd_expand(cptr->c_keys[a],1));
 575                                     }
 576                                 printf("\n");
 577                                 }
 578                             }
 579
 580                         printf("\n%s%c ",room_name,room_prompt(room_flags));
 581                         got = 0;
 582                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 583                             if ((got==0)&&(cmdmatch(cmdbuf,cptr,cmdpos))) {
 584                                 for (a=0; a<cmdpos; ++a) {
 585                                     printf("%s ",
 586                                         cmd_expand(cptr->c_keys[a],0));
 587                                     }
 588                                 got = 1;
 589                                 }
 590                             }
 591                         }
 592
 593                 }
 594
 595         }
 596
 597
 598
 599
 600
 601 /*
 602  * set tty modes.  commands are:
 603  *
 604  * 0 - set to bbs mode, intr/quit disabled
 605  * 1 - set to bbs mode, intr/quit enabled
 606  * 2 - save current settings for later restoral
 607  * 3 - restore saved settings
 608  */
 609 #ifdef HAVE_TERMIOS_H
 610 void sttybbs(int cmd)           /* SysV version of sttybbs() */
 611          {
 612         struct termios live;
 613         static struct termios saved_settings;
 614
 615         if ( (cmd == 0) || (cmd == 1) ) {
 616                 tcgetattr(0,&live);
 617                 live.c_iflag=ISTRIP|IXON|IXANY;
 618                 live.c_oflag=OPOST|ONLCR;
 619                 live.c_lflag=NOFLSH;
 620                 if (cmd==1) live.c_lflag=ISIG|NOFLSH;
 621
 622                 if (cmd==SB_YES_INTR) {
 623                         live.c_cc[VINTR]=NEXT_KEY;
 624                         live.c_cc[VQUIT]=STOP_KEY;
 625                         signal(SIGINT,*sighandler);
 626                         signal(SIGQUIT,*sighandler);
 627                         }
 628                 else {
 629                         signal(SIGINT,SIG_IGN);
 630                         signal(SIGQUIT,SIG_IGN);
 631                         live.c_cc[VINTR]=(-1);
 632                         live.c_cc[VQUIT]=(-1);
 633                         }
 634
 635                 /* do we even need this stuff anymore? */
 636                 /* live.c_line=0; */
 637                 live.c_cc[VERASE]=8;
 638                 live.c_cc[VKILL]=24;
 639                 live.c_cc[VEOF]=1;
 640                 live.c_cc[VEOL]=255;
 641                 live.c_cc[VEOL2]=0;
 642                 live.c_cc[VSTART]=0;
 643                 tcsetattr(0,TCSADRAIN,&live);
 644                 }
 645         if (cmd == 2) {
 646                 tcgetattr(0,&saved_settings);
 647                 }
 648         if (cmd == 3) {
 649                 tcsetattr(0,TCSADRAIN,&saved_settings);
 650                 }
 651         }
 652 #else
 653 void sttybbs(int cmd)           /* BSD version of sttybbs() */
 654 {
 655         struct sgttyb live;
 656         static struct sgttyb saved_settings;
 657
 658         if ( (cmd == 0) || (cmd == 1) ) {
 659                 gtty(0,&live);
 660                 live.sg_flags |= CBREAK;
 661                 live.sg_flags |= CRMOD;
 662                 live.sg_flags |= NL1;
 663                 live.sg_flags &= ~ECHO;
 664                 if (cmd==1) live.sg_flags |= NOFLSH;
 665                 stty(0,&live);
 666                 }
 667         if (cmd == 2) {
 668                 gtty(0,&saved_settings);
 669                 }
 670         if (cmd == 3) {
 671                 stty(0,&saved_settings);
 672                 }
 673         }
 674 #endif
 675
 676
 677 /*
 678  * display_help()  -  help file viewer
 679  */
 680 void display_help(char *name)
 681 {
 682         formout(name);
 683         }
 684
 685
 686 /*
 687  * fmout()  -  Citadel text formatter and paginator
 688  */
 689 int fmout(int width, FILE *fp, char pagin, int height, int starting_lp, char subst)
 690                         /* screen width to use */
 691                         /* file to read from, or NULL to read from server */
 692                         /* nonzero if we should use the paginator */
 693                         /* screen height to use */
 694                         /* starting value for lines_printed, -1 for global */
 695                         /* nonzero if we should use hypertext mode */
 696         {
 697         int a,b,c,d,old;
 698         int real = (-1);
 699         char aaa[140];
 700         char buffer[512];
 701         int eof_flag = 0;
 702
 703         if (starting_lp >= 0) {
 704                 lines_printed = starting_lp;
 705                 }
 706         strcpy(aaa,""); old=255;
 707         strcpy(buffer,"");
 708         c=1; /* c is the current pos */
 709
 710         sigcaught = 0;
 711         sttybbs(1);
 712
 713 FMTA:   while ( (eof_flag==0) && (strlen(buffer)<126) ) {
 714                 if (sigcaught) goto OOPS;
 715                 if (fp!=NULL) { /* read from file */
 716                         if (feof(fp)) eof_flag = 1;
 717                         if (eof_flag==0) {
 718                                 a=getc(fp);
 719                                 buffer[strlen(buffer)+1] = 0;
 720                                 buffer[strlen(buffer)] = a;
 721                                 }
 722                         }
 723                 else {          /* read from server */
 724                         d=strlen(buffer);
 725                         serv_gets(&buffer[d]);
 726 while ( (!isspace(buffer[d])) && (isspace(buffer[strlen(buffer)-1])) )
 727         buffer[strlen(buffer)-1]=0;
 728                         if (!strcmp(&buffer[d],"000")) {
 729                                 buffer[d] = 0;
 730                                 eof_flag = 1;
 731                                 while(isspace(buffer[strlen(buffer)-1]))
 732                                         buffer[strlen(buffer)-1] = 0;
 733                                 }
 734                         d=strlen(buffer);
 735                         buffer[d] = 10;
 736                         buffer[d+1] = 0;
 737                         }
 738                 }
 739
 740         buffer[strlen(buffer)+1] = 0;
 741         a=buffer[0];
 742         strcpy(buffer,&buffer[1]);
 743
 744         old=real;
 745         real=a;
 746         if (a<=0) goto FMTEND;
 747
 748         if ( ((a==13)||(a==10)) && (old!=13) && (old!=10) ) a=32;
 749         if ( ((old==13)||(old==10)) && (isspace(real)) ) {
 750                 printf("\n");
 751                 ++lines_printed;
 752                 lines_printed = checkpagin(lines_printed,pagin,height);
 753                 c=1;
 754                 }
 755         if (a>126) goto FMTA;
 756
 757         if (a>32) {
 758         if ( ((strlen(aaa)+c)>(width-5)) && (strlen(aaa)>(width-5)) ) {
 759                 printf("\n%s",aaa); c=strlen(aaa); aaa[0]=0;
 760                 ++lines_printed;
 761                 lines_printed = checkpagin(lines_printed,pagin,height);
 762                 }
 763             b=strlen(aaa); aaa[b]=a; aaa[b+1]=0;
 764             }
 765         if (a==32) {
 766                 if ((strlen(aaa)+c)>(width-5)) {
 767                         c=1;
 768                         printf("\n");
 769                         ++lines_printed;
 770                         lines_printed = checkpagin(lines_printed,pagin,height);
 771                         }
 772                 printf("%s ",aaa); ++c; c=c+strlen(aaa);
 773                 strcpy(aaa,"");
 774                 goto FMTA;
 775                 }
 776         if ((a==13)||(a==10)) {
 777                 printf("%s\n",aaa);
 778                 c=1;
 779                 ++lines_printed;
 780                 lines_printed = checkpagin(lines_printed,pagin,height);
 781                 strcpy(aaa,"");
 782                 goto FMTA;
 783                 }
 784         goto FMTA;
 785
 786         /* signal caught; drain the server */
 787 OOPS:   do {
 788                 serv_gets(aaa);
 789                 } while(strcmp(aaa,"000"));
 790
 791 FMTEND: printf("\n");
 792         ++lines_printed;
 793         lines_printed = checkpagin(lines_printed,pagin,height);
 794         return(sigcaught);
 795 }
 796
 797
 798 /*
 799  * support ANSI color if defined
 800  */
 801 void color(int colornum)
 802 {
 803
 804 #ifdef ANSI_COLOR
 805         if (enable_color) {
 806                 fflush(stdout);
 807                 printf("%c[3%dm%c[1m", 27, colornum, 27);
 808                 fflush(stdout);
 809                 }
 810 #endif
 811         }
 812
 813 void cls(void) {
 814 #ifdef ANSI_COLOR
 815         fflush(stdout);
 816         printf("%c[2J%c[H", 27, 27);
 817         fflush(stdout);
 818 #endif
 819         }
 820
 821
 822 /*
 823  * Detect whether ANSI color is available (answerback)
 824  */
 825 void send_ansi_detect(void) {
 826 #ifdef ANSI_COLOR
 827         printf("%c[c", 27);
 828         fflush(stdout);
 829         time(&AnsiDetect);
 830 #endif
 831         }
 832
 833 void look_for_ansi(void) {
 834 #ifdef ANSI_COLOR
 835         fd_set rfds;
 836         struct timeval tv;
 837         char abuf[512];
 838         time_t now;
 839         int a;
 840
 841         strcpy(abuf, "");
 842
 843         time(&now);
 844         if ( (now - AnsiDetect) < 2 ) sleep(1);
 845
 846         do {
 847                 FD_ZERO(&rfds);
 848                 FD_SET(0,&rfds);
 849                 tv.tv_sec = 0;
 850                 tv.tv_usec = 1;
 851
 852                 select(1, &rfds, NULL, NULL, &tv);
 853                 if (FD_ISSET(0, &rfds)) {
 854                         abuf[strlen(abuf)+1] = 0;
 855                         read(0, &abuf[strlen(abuf)], 1);
 856                         }
 857
 858                 } while (FD_ISSET(0, &rfds));
 859
 860         for (a=0; a<strlen(abuf); ++a) {
 861                 if ( (abuf[a] == 27) && (abuf[a+1] == '[')
 862                    && (abuf[a+2] == '?') ) {
 863                         enable_color = 1;
 864                         }
 865                 }
 866 #endif
 867         }