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 int next_lazy_cmd = 5;
  57
  58 struct citcmd *cmdlist = NULL;
  59
  60
  61 /* these variables are local to this module */
  62 char keepalives_enabled = KA_YES;       /* send NOOPs to server when idle */
  63 int ok_to_interrupt = 0;                /* print express msgs asynchronously */
  64 time_t AnsiDetect;                      /* when did we send the detect code? */
  65 int enable_color = 0;                   /* nonzero for ANSI color */
  66
  67
  68 /*
  69  * print_express()  -  print express messages if there are any
  70  */
  71 void print_express(void) {
  72         char buf[256];
  73         FILE *outpipe;
  74
  75         if (express_msgs == 0) return;
  76         express_msgs = 0;
  77         serv_puts("PEXP");
  78         serv_gets(buf);
  79         if (buf[0]!='1') return;
  80
  81         if (strlen(rc_exp_cmd) > 0) {
  82                 outpipe = popen(rc_exp_cmd, "w");
  83                 if (outpipe != NULL) {
  84                         while (serv_gets(buf), strcmp(buf,"000")) {
  85                                 fprintf(outpipe, "%s\n", buf);
  86                                 }
  87                         pclose(outpipe);
  88                         return;
  89                         }
  90                 }
  91
  92         /* fall back to built-in express message display */
  93         if (rc_exp_beep) {
  94                 putc(7,stdout);
  95                 }
  96         color(1);
  97         printf("---\n");
  98         while (serv_gets(buf), strcmp(buf,"000")) {
  99                 printf("%s\n",buf);
 100                 }
 101         printf("---\n");
 102         color(7);
 103         }
 104
 105
 106 void set_keepalives(int s)
 107 {
 108         keepalives_enabled = (char)s;
 109         }
 110
 111 /*
 112  * This loop handles the "keepalive" messages sent to the server when idling.
 113  */
 114 void do_keepalive(void) {
 115         char buf[256];
 116         static time_t idlet = 0;
 117         time_t now;
 118
 119         time(&now);
 120         if ((now - idlet) < ((long)S_KEEPALIVE)) return;
 121         time(&idlet);
 122
 123         if (keepalives_enabled != KA_NO) {
 124                 serv_puts("NOOP");
 125                 if (keepalives_enabled == KA_YES) {
 126                         serv_gets(buf);
 127                         if (buf[3]=='*') {
 128                                 express_msgs = 1;
 129                                 if (ok_to_interrupt == 1) {
 130                                         printf("\r                    \r");
 131                                         print_express();
 132                                         printf("%s%c ",room_name,
 133                                                 room_prompt(room_flags));
 134                                         fflush(stdout);
 135                                         }
 136                                 }
 137                         }
 138                 }
 139         }
 140
 141
 142 int inkey(void) {               /* get a character from the keyboard, with   */
 143         int a;          /* the watchdog timer in effect if necessary */
 144         fd_set rfds;
 145         struct timeval tv;
 146         time_t start_time, now;
 147         char inbuf[2];
 148
 149         time(&start_time);
 150
 151         do {
 152
 153                 /* This loop waits for keyboard input.  If the keepalive
 154                  * timer expires, it sends a keepalive to the server if
 155                  * necessary and then waits again.
 156                  */
 157                 do {
 158                         do_keepalive();
 159                         fflush(stdout);
 160                         FD_ZERO(&rfds);
 161                         FD_SET(0,&rfds);
 162                         tv.tv_sec = S_KEEPALIVE;
 163                         tv.tv_usec = 0;
 164
 165                         time(&now);
 166                         if (((now-start_time) > SLEEPING)
 167                            && (SLEEPING != 0) && (getppid()==1)) {
 168                                 printf("Sleeping? Call again.\n");
 169                                 logoff(SIGALRM);
 170                                 }
 171
 172                         select(1, &rfds, NULL, NULL, &tv);
 173                         } while (!FD_ISSET(0, &rfds));
 174
 175
 176
 177
 178                 /* At this point, there's input, so fetch it.
 179                  * (There's a hole in the bucket...)
 180                  */
 181                 read(0, inbuf, 1);
 182                 a = inbuf[0];
 183                 if (a==127) a=8;
 184                 if (a>126) a=0;
 185                 if (a==10) a=13;
 186                 if (((a!=4)&&(a!=13)&&(a!=8)&&(a!=NEXT_KEY)&&(a!=STOP_KEY))
 187                         && ((a<32)||(a>126))) a=0;
 188                 } while(a==0);
 189         return(a);
 190         }
 191
 192 void getline(char *string, int lim)     /* Gets a line from the terminal */
 193                         /* Pointer to string buffer */
 194                         /* Maximum length - if negative, no-show */
 195 {
 196         int a,b;
 197         char flag = 0;
 198
 199         if (lim<0) { lim=(0-lim); flag=1; }
 200         strcpy(string,"");
 201         gl_string = string;
 202 GLA:    a=inkey(); a=(a&127);
 203         if ((a==8)&&(strlen(string)==0)) goto GLA;
 204         if ((a!=13)&&(a!=8)&&(strlen(string)==lim)) goto GLA;
 205         if ((a==8)&&(string[0]!=0)) {
 206                 string[strlen(string)-1]=0;
 207                 putc(8,stdout); putc(32,stdout); putc(8,stdout); goto GLA; }
 208         if ((a==13)||(a==10)) {
 209                 putc(13,stdout);
 210                 putc(10,stdout);
 211                 return;
 212                 }
 213         if (a<32) a='.';
 214         b=strlen(string);
 215         string[b]=a;
 216         string[b+1]=0;
 217         if (flag==0) putc(a,stdout);
 218         if (flag==1) putc('*',stdout);
 219         goto GLA;
 220         }
 221
 222
 223 /*
 224  * strprompt()  -  prompt for a string, print the existing value and
 225  *                 allow the user to press return to keep it...
 226  */
 227 void strprompt(char *prompt, char *str, int len)
 228 {
 229         char buf[128];
 230         print_express();
 231         color(3);
 232         printf("%s [", prompt);
 233         color(1);
 234         printf("%s", str);
 235         color(3);
 236         printf("]: ");
 237         color(2);
 238         getline(buf,len);
 239         color(7);
 240         if (buf[0]!=0) strcpy(str,buf);
 241         }
 242
 243 /*
 244  * intprompt()  -  like strprompt(), except for an integer
 245  *                 (note that it RETURNS the new value!)
 246  */
 247 int intprompt(char *prompt, int ival, int imin, int imax)
 248 {
 249         char buf[16];
 250         int i;
 251         i = ival;
 252         do {
 253                 sprintf(buf,"%d",i);
 254                 strprompt(prompt,buf,15);
 255                 i=atoi(buf);
 256                 if (i<imin) printf("*** Must be no less than %d.\n",imin);
 257                 if (i>imax) printf("*** Must be no more than %d.\n",imax);
 258                 } while((i<imin)||(i>imax));
 259         return(i);
 260         }
 261
 262 /*
 263  * newprompt()  -  prompt for a string with no existing value
 264  *                 (clears out string buffer first)
 265  */
 266 void newprompt(char *prompt, char *str, int len)
 267 {
 268         color(3);
 269         printf("%s",prompt);
 270         color(2);
 271         getline(str,len);
 272         color(7);
 273         }
 274
 275
 276 int lkey(void) {        /* returns a lower case value */
 277         int a;
 278         a=inkey();
 279         if (isupper(a)) a=tolower(a);
 280         return(a);
 281         }
 282
 283 /*
 284  * parse the citadel.rc file
 285  */
 286 void load_command_set(void) {
 287         FILE *ccfile;
 288         char buf[256];
 289         struct citcmd *cptr;
 290         struct citcmd *lastcmd = NULL;
 291         int a,d;
 292         int b = 0;
 293
 294
 295         /* first, set up some defaults for non-required variables */
 296
 297         strcpy(editor_path,"");
 298         strcpy(printcmd,"");
 299         strcpy(rc_username,"");
 300         strcpy(rc_password,"");
 301         rc_floor_mode = 0;
 302         rc_exp_beep = 1;
 303         rc_allow_attachments = 0;
 304         strcpy(rc_exp_cmd, "");
 305         rc_display_message_numbers = 0;
 306
 307         /* now try to open the citadel.rc file */
 308
 309         ccfile = NULL;
 310         if (getenv("HOME") != NULL) {
 311                 sprintf(buf,"%s/.citadelrc",getenv("HOME"));
 312                 ccfile = fopen(buf,"r");
 313                 }
 314         if (ccfile==NULL) {
 315                 ccfile = fopen("/usr/local/lib/citadel.rc","r");
 316                 }
 317         if (ccfile==NULL) {
 318                 sprintf(buf,"%s/citadel.rc",BBSDIR);
 319                 ccfile = fopen(buf,"r");
 320                 }
 321         if (ccfile==NULL) {
 322                 perror("commands: cannot open citadel.rc");
 323                 logoff(errno);
 324                 }
 325
 326         while (fgets(buf, 256, ccfile) != NULL) {
 327             while ( (strlen(buf)>0) ? (isspace(buf[strlen(buf)-1])) : 0 )
 328                 buf[strlen(buf)-1] = 0;
 329
 330             if (!struncmp(buf,"editor=",7))
 331                 strcpy(editor_path,&buf[7]);
 332
 333             if (!struncmp(buf,"printcmd=",9))
 334                 strcpy(printcmd,&buf[9]);
 335
 336             if (!struncmp(buf,"expcmd=",7))
 337                 strcpy(rc_exp_cmd,&buf[7]);
 338
 339             if (!struncmp(buf,"local_screen_dimensions=",24))
 340                 have_xterm = (char)atoi(&buf[24]);
 341
 342             if (!struncmp(buf,"use_floors=",11)) {
 343                 if (!strucmp(&buf[11],"yes")) rc_floor_mode = RC_YES;
 344                 if (!strucmp(&buf[11],"no")) rc_floor_mode = RC_NO;
 345                 if (!strucmp(&buf[11],"default")) rc_floor_mode = RC_DEFAULT;
 346                 }
 347
 348             if (!struncmp(buf,"beep=",5)) {
 349                 rc_exp_beep = atoi(&buf[5]);
 350                 }
 351
 352             if (!struncmp(buf,"allow_attachments=", 18)) {
 353                 rc_allow_attachments = atoi(&buf[18]);
 354                 }
 355
 356             if (!struncmp(buf,"display_message_numbers=", 24)) {
 357                 rc_display_message_numbers = atoi(&buf[24]);
 358                 }
 359
 360             if (!struncmp(buf,"username=",9))
 361                 strcpy(rc_username,&buf[9]);
 362
 363             if (!struncmp(buf,"password=",9))
 364                 strcpy(rc_password,&buf[9]);
 365
 366             if (!struncmp(buf,"cmd=",4)) {
 367                 strcpy(buf,&buf[4]);
 368
 369                 cptr = (struct citcmd *) malloc (sizeof(struct citcmd));
 370
 371                 cptr->c_cmdnum = atoi (buf);
 372                 for (d=strlen(buf); d>=0; --d)
 373                         if (buf[d]==',') b=d;
 374                 strcpy (buf, &buf[b+1]);
 375
 376                 cptr->c_axlevel = atoi (buf);
 377                 for (d=strlen(buf); d>=0; --d)
 378                         if (buf[d]==',') b=d;
 379                 strcpy (buf, &buf[b+1]);
 380
 381                 for (a=0; a<5; ++a) cptr->c_keys[a][0] = 0;
 382
 383                 a = 0;  b = 0;
 384                 buf[strlen(buf)+1] = 0;
 385                 while (strlen(buf) > 0) {
 386                         b = strlen(buf);
 387                         for (d=strlen(buf); d>=0; --d)
 388                                 if (buf[d]==',') b=d;
 389                         strncpy(cptr->c_keys[a],buf,b);
 390                         cptr->c_keys[a][b] = 0;
 391                         if (buf[b]==',')
 392                                 strcpy(buf,&buf[b+1]);
 393                         else
 394                                 strcpy(buf,"");
 395                         ++a;
 396                         }
 397
 398                 cptr->next = NULL;
 399                 if (cmdlist == NULL) cmdlist = cptr;
 400                 else lastcmd->next = cptr;
 401                 lastcmd = cptr;
 402                 }
 403             }
 404         fclose(ccfile);
 405         }
 406
 407
 408
 409 /*
 410  * return the key associated with a command
 411  */
 412 char keycmd(char *cmdstr)
 413 {
 414         int a;
 415
 416         for (a=0; a<strlen(cmdstr); ++a)
 417                 if (cmdstr[a]=='&')
 418                         return(tolower(cmdstr[a+1]));
 419         return(0);
 420         }
 421
 422
 423 /*
 424  * Output the string from a key command without the ampersand
 425  * "mode" should be set to 0 for normal or 1 for <C>ommand key highlighting
 426  */
 427 char *cmd_expand(char *strbuf, int mode)
 428 {
 429         int a;
 430         static char exp[64];
 431         char buf[256];
 432
 433         strcpy(exp,strbuf);
 434
 435         for (a=0; a<strlen(exp); ++a) {
 436                 if (strbuf[a] == '&') {
 437
 438                     if (mode == 0) {
 439                         strcpy(&exp[a],&exp[a+1]);
 440                         }
 441
 442                     if (mode == 1) {
 443                         exp[a] = '<';
 444                         strcpy(buf,&exp[a+2]);
 445                         exp[a+2] = '>';
 446                         exp[a+3] = 0;
 447                         strcat(exp,buf);
 448                         }
 449
 450                     }
 451
 452                 if (!strncmp(&exp[a],"^r",2)) {
 453                         strcpy(buf,exp);
 454                         strcpy(&exp[a],room_name);
 455                         strcat(exp,&buf[a+2]);
 456                         }
 457
 458                 if (!strncmp(&exp[a],"^c",2)) {
 459                         exp[a] = ',';
 460                         strcpy(&exp[a+1],&exp[a+2]);
 461                         }
 462
 463                 }
 464
 465         return(exp);
 466         }
 467
 468
 469
 470 /*
 471  * Comparison function to determine if entered commands match a
 472  * command loaded from the config file.
 473  */
 474 int cmdmatch(char *cmdbuf, struct citcmd *cptr, int ncomp)
 475 {
 476         int a;
 477         int cmdax;
 478
 479         cmdax = 0;
 480         if (is_room_aide) cmdax = 1;
 481         if (axlevel >=6) cmdax = 2;
 482
 483         for (a=0; a<ncomp; ++a) {
 484                 if ( (tolower(cmdbuf[a]) != keycmd(cptr->c_keys[a]))
 485                    || (cptr->c_axlevel > cmdax) )
 486                         return(0);
 487                 }
 488         return(1);
 489         }
 490
 491
 492 /*
 493  * This function returns 1 if a given command requires a string input
 494  */
 495 int requires_string(struct citcmd *cptr, int ncomp)
 496 {
 497         int a;
 498         char buf[64];
 499
 500         strcpy(buf,cptr->c_keys[ncomp-1]);
 501         for (a=0; a<strlen(buf); ++a) {
 502                 if (buf[a]==':') return(1);
 503                 }
 504         return(0);
 505         }
 506
 507
 508 /*
 509  * Input a command at the main prompt.
 510  * This function returns an integer command number.  If the command prompts
 511  * for a string then it is placed in the supplied buffer.
 512  */
 513 int getcmd(char *argbuf)
 514 {
 515         char cmdbuf[5];
 516         int cmdspaces[5];
 517         int cmdpos;
 518         int ch;
 519         int a;
 520         int got;
 521         int this_lazy_cmd;
 522         struct citcmd *cptr;
 523
 524         /* if we're running in idiot mode, display a cute little menu */
 525         IFNEXPERT formout("mainmenu");
 526
 527         print_express(); /* print express messages if there are any */
 528         strcpy(argbuf, "");
 529         cmdpos = 0;
 530         for (a=0; a<5; ++a) cmdbuf[a]=0;
 531         /* now the room prompt... */
 532         ok_to_interrupt = 1;
 533         printf("\n%s%c ",room_name,room_prompt(room_flags));
 534         fflush(stdout);
 535
 536         while(1) {
 537                 ch = inkey();
 538                 ok_to_interrupt = 0;
 539
 540                 /* Handle the backspace key, but only if there's something
 541                  * to backspace over...
 542                  */
 543                 if ( (ch == 8) && (cmdpos > 0) ) {
 544                         back(cmdspaces[cmdpos-1] + 1);
 545                         cmdbuf[cmdpos] = 0;
 546                         --cmdpos;
 547                         }
 548
 549                 /* Spacebar invokes "lazy traversal" commands */
 550                 if ( (ch == 32) && (cmdpos == 0) ) {
 551                         this_lazy_cmd = next_lazy_cmd;
 552                         if (this_lazy_cmd == 13) next_lazy_cmd = 5;
 553                         if (this_lazy_cmd == 5) next_lazy_cmd = 13;
 554                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 555                                 if (cptr->c_cmdnum == this_lazy_cmd) {
 556                                         for (a=0; a<5; ++a)
 557                                             if (cptr->c_keys[a][0] != 0)
 558                                                 printf("%s ", cmd_expand(
 559                                                         cptr->c_keys[a], 0));
 560                                         printf("\n");
 561                                         return(this_lazy_cmd);
 562                                         }
 563                                 }
 564                         printf("\n");
 565                         return(this_lazy_cmd);
 566                         }
 567
 568                 /* Otherwise, process the command */
 569                 cmdbuf[cmdpos] = tolower(ch);
 570
 571                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 572                         if (cmdmatch(cmdbuf,cptr,cmdpos+1)) {
 573
 574                                 printf("%s",cmd_expand(cptr->c_keys[cmdpos],0));
 575                                 cmdspaces[cmdpos] = strlen(
 576                                         cmd_expand(cptr->c_keys[cmdpos],0) );
 577                                 if (cmdpos<4)
 578                                         if ((cptr->c_keys[cmdpos+1]) != 0)
 579                                                 putc(' ',stdout);
 580                                 ++cmdpos;
 581                                 }
 582                         }
 583
 584                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 585                         if (cmdmatch(cmdbuf,cptr,5)) {
 586                                 /* We've found our command. */
 587                                 if (requires_string(cptr,cmdpos)) {
 588                                         getline(argbuf,32);
 589                                         }
 590                                 else {
 591                                         printf("\n");
 592                                         }
 593
 594                                 /* If this command is one that changes rooms,
 595                                  * then the next lazy-command (space bar)
 596                                  * should be "read new" instead of "goto"
 597                                  */
 598                                 if ((cptr->c_cmdnum==5)
 599                                         ||(cptr->c_cmdnum==6)
 600                                         ||(cptr->c_cmdnum==47)
 601                                         ||(cptr->c_cmdnum==52)
 602                                         ||(cptr->c_cmdnum==16)
 603                                         ||(cptr->c_cmdnum==20))
 604                                                 next_lazy_cmd = 13;
 605
 606                                 return(cptr->c_cmdnum);
 607
 608                                 }
 609                         }
 610
 611                 if (ch == '?') {
 612                         printf("\rOne of ...                         \n");
 613                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 614                             if (cmdmatch(cmdbuf,cptr,cmdpos)) {
 615                                 for (a=0; a<5; ++a) {
 616                                     printf("%s ",cmd_expand(cptr->c_keys[a],1));
 617                                     }
 618                                 printf("\n");
 619                                 }
 620                             }
 621
 622                         printf("\n%s%c ",room_name,room_prompt(room_flags));
 623                         got = 0;
 624                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 625                             if ((got==0)&&(cmdmatch(cmdbuf,cptr,cmdpos))) {
 626                                 for (a=0; a<cmdpos; ++a) {
 627                                     printf("%s ",
 628                                         cmd_expand(cptr->c_keys[a],0));
 629                                     }
 630                                 got = 1;
 631                                 }
 632                             }
 633                         }
 634
 635                 }
 636
 637         }
 638
 639
 640
 641
 642
 643 /*
 644  * set tty modes.  commands are:
 645  *
 646  * 0 - set to bbs mode, intr/quit disabled
 647  * 1 - set to bbs mode, intr/quit enabled
 648  * 2 - save current settings for later restoral
 649  * 3 - restore saved settings
 650  */
 651 #ifdef HAVE_TERMIOS_H
 652 void sttybbs(int cmd)           /* SysV version of sttybbs() */
 653          {
 654         struct termios live;
 655         static struct termios saved_settings;
 656
 657         if ( (cmd == 0) || (cmd == 1) ) {
 658                 tcgetattr(0,&live);
 659                 live.c_iflag=ISTRIP|IXON|IXANY;
 660                 live.c_oflag=OPOST|ONLCR;
 661                 live.c_lflag=NOFLSH;
 662                 if (cmd==1) live.c_lflag=ISIG|NOFLSH;
 663
 664                 if (cmd==SB_YES_INTR) {
 665                         live.c_cc[VINTR]=NEXT_KEY;
 666                         live.c_cc[VQUIT]=STOP_KEY;
 667                         signal(SIGINT,*sighandler);
 668                         signal(SIGQUIT,*sighandler);
 669                         }
 670                 else {
 671                         signal(SIGINT,SIG_IGN);
 672                         signal(SIGQUIT,SIG_IGN);
 673                         live.c_cc[VINTR]=(-1);
 674                         live.c_cc[VQUIT]=(-1);
 675                         }
 676
 677                 /* do we even need this stuff anymore? */
 678                 /* live.c_line=0; */
 679                 live.c_cc[VERASE]=8;
 680                 live.c_cc[VKILL]=24;
 681                 live.c_cc[VEOF]=1;
 682                 live.c_cc[VEOL]=255;
 683                 live.c_cc[VEOL2]=0;
 684                 live.c_cc[VSTART]=0;
 685                 tcsetattr(0,TCSADRAIN,&live);
 686                 }
 687         if (cmd == 2) {
 688                 tcgetattr(0,&saved_settings);
 689                 }
 690         if (cmd == 3) {
 691                 tcsetattr(0,TCSADRAIN,&saved_settings);
 692                 }
 693         }
 694 #else
 695 void sttybbs(int cmd)           /* BSD version of sttybbs() */
 696 {
 697         struct sgttyb live;
 698         static struct sgttyb saved_settings;
 699
 700         if ( (cmd == 0) || (cmd == 1) ) {
 701                 gtty(0,&live);
 702                 live.sg_flags |= CBREAK;
 703                 live.sg_flags |= CRMOD;
 704                 live.sg_flags |= NL1;
 705                 live.sg_flags &= ~ECHO;
 706                 if (cmd==1) live.sg_flags |= NOFLSH;
 707                 stty(0,&live);
 708                 }
 709         if (cmd == 2) {
 710                 gtty(0,&saved_settings);
 711                 }
 712         if (cmd == 3) {
 713                 stty(0,&saved_settings);
 714                 }
 715         }
 716 #endif
 717
 718
 719 /*
 720  * display_help()  -  help file viewer
 721  */
 722 void display_help(char *name)
 723 {
 724         formout(name);
 725         }
 726
 727
 728 /*
 729  * fmout()  -  Citadel text formatter and paginator
 730  */
 731 int fmout(int width, FILE *fp, char pagin, int height, int starting_lp, char subst)
 732                         /* screen width to use */
 733                         /* file to read from, or NULL to read from server */
 734                         /* nonzero if we should use the paginator */
 735                         /* screen height to use */
 736                         /* starting value for lines_printed, -1 for global */
 737                         /* nonzero if we should use hypertext mode */
 738         {
 739         int a,b,c,d,old;
 740         int real = (-1);
 741         char aaa[140];
 742         char buffer[512];
 743         int eof_flag = 0;
 744
 745         if (starting_lp >= 0) {
 746                 lines_printed = starting_lp;
 747                 }
 748         strcpy(aaa,""); old=255;
 749         strcpy(buffer,"");
 750         c=1; /* c is the current pos */
 751
 752         sigcaught = 0;
 753         sttybbs(1);
 754
 755 FMTA:   while ( (eof_flag==0) && (strlen(buffer)<126) ) {
 756                 if (sigcaught) goto OOPS;
 757                 if (fp!=NULL) { /* read from file */
 758                         if (feof(fp)) eof_flag = 1;
 759                         if (eof_flag==0) {
 760                                 a=getc(fp);
 761                                 buffer[strlen(buffer)+1] = 0;
 762                                 buffer[strlen(buffer)] = a;
 763                                 }
 764                         }
 765                 else {          /* read from server */
 766                         d=strlen(buffer);
 767                         serv_gets(&buffer[d]);
 768 while ( (!isspace(buffer[d])) && (isspace(buffer[strlen(buffer)-1])) )
 769         buffer[strlen(buffer)-1]=0;
 770                         if (!strcmp(&buffer[d],"000")) {
 771                                 buffer[d] = 0;
 772                                 eof_flag = 1;
 773                                 while(isspace(buffer[strlen(buffer)-1]))
 774                                         buffer[strlen(buffer)-1] = 0;
 775                                 }
 776                         d=strlen(buffer);
 777                         buffer[d] = 10;
 778                         buffer[d+1] = 0;
 779                         }
 780                 }
 781
 782         buffer[strlen(buffer)+1] = 0;
 783         a=buffer[0];
 784         strcpy(buffer,&buffer[1]);
 785
 786         old=real;
 787         real=a;
 788         if (a<=0) goto FMTEND;
 789
 790         if ( ((a==13)||(a==10)) && (old!=13) && (old!=10) ) a=32;
 791         if ( ((old==13)||(old==10)) && (isspace(real)) ) {
 792                 printf("\n");
 793                 ++lines_printed;
 794                 lines_printed = checkpagin(lines_printed,pagin,height);
 795                 c=1;
 796                 }
 797         if (a>126) goto FMTA;
 798
 799         if (a>32) {
 800         if ( ((strlen(aaa)+c)>(width-5)) && (strlen(aaa)>(width-5)) ) {
 801                 printf("\n%s",aaa); c=strlen(aaa); aaa[0]=0;
 802                 ++lines_printed;
 803                 lines_printed = checkpagin(lines_printed,pagin,height);
 804                 }
 805             b=strlen(aaa); aaa[b]=a; aaa[b+1]=0;
 806             }
 807         if (a==32) {
 808                 if ((strlen(aaa)+c)>(width-5)) {
 809                         c=1;
 810                         printf("\n");
 811                         ++lines_printed;
 812                         lines_printed = checkpagin(lines_printed,pagin,height);
 813                         }
 814                 printf("%s ",aaa); ++c; c=c+strlen(aaa);
 815                 strcpy(aaa,"");
 816                 goto FMTA;
 817                 }
 818         if ((a==13)||(a==10)) {
 819                 printf("%s\n",aaa);
 820                 c=1;
 821                 ++lines_printed;
 822                 lines_printed = checkpagin(lines_printed,pagin,height);
 823                 strcpy(aaa,"");
 824                 goto FMTA;
 825                 }
 826         goto FMTA;
 827
 828         /* signal caught; drain the server */
 829 OOPS:   do {
 830                 serv_gets(aaa);
 831                 } while(strcmp(aaa,"000"));
 832
 833 FMTEND: printf("\n");
 834         ++lines_printed;
 835         lines_printed = checkpagin(lines_printed,pagin,height);
 836         return(sigcaught);
 837 }
 838
 839
 840 /*
 841  * support ANSI color if defined
 842  */
 843 void color(int colornum)
 844 {
 845
 846 #ifdef ANSI_COLOR
 847         if (enable_color) {
 848                 fflush(stdout);
 849                 printf("%c[3%dm%c[1m", 27, colornum, 27);
 850                 fflush(stdout);
 851                 }
 852 #endif
 853         }
 854
 855 void cls(void) {
 856 #ifdef ANSI_COLOR
 857         fflush(stdout);
 858         printf("%c[2J%c[H", 27, 27);
 859         fflush(stdout);
 860 #endif
 861         }
 862
 863
 864 /*
 865  * Detect whether ANSI color is available (answerback)
 866  */
 867 void send_ansi_detect(void) {
 868 #ifdef ANSI_COLOR
 869         printf("%c[c", 27);
 870         fflush(stdout);
 871         time(&AnsiDetect);
 872 #endif
 873         }
 874
 875 void look_for_ansi(void) {
 876 #ifdef ANSI_COLOR
 877         fd_set rfds;
 878         struct timeval tv;
 879         char abuf[512];
 880         time_t now;
 881         int a;
 882
 883         strcpy(abuf, "");
 884
 885         time(&now);
 886         if ( (now - AnsiDetect) < 2 ) sleep(1);
 887
 888         do {
 889                 FD_ZERO(&rfds);
 890                 FD_SET(0,&rfds);
 891                 tv.tv_sec = 0;
 892                 tv.tv_usec = 1;
 893
 894                 select(1, &rfds, NULL, NULL, &tv);
 895                 if (FD_ISSET(0, &rfds)) {
 896                         abuf[strlen(abuf)+1] = 0;
 897                         read(0, &abuf[strlen(abuf)], 1);
 898                         }
 899
 900                 } while (FD_ISSET(0, &rfds));
 901
 902         for (a=0; a<strlen(abuf); ++a) {
 903                 if ( (abuf[a] == 27) && (abuf[a+1] == '[')
 904                    && (abuf[a+2] == '?') ) {
 905                         enable_color = 1;
 906                         }
 907                 }
 908 #endif
 909         }