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 int rc_force_mail_prompts;
  55
  56 char *gl_string;
  57 int next_lazy_cmd = 5;
  58
  59 struct citcmd *cmdlist = NULL;
  60
  61
  62 /* these variables are local to this module */
  63 char keepalives_enabled = KA_YES;       /* send NOOPs to server when idle */
  64 int ok_to_interrupt = 0;                /* print express msgs asynchronously */
  65 time_t AnsiDetect;                      /* when did we send the detect code? */
  66 int enable_color = 0;                   /* nonzero for ANSI color */
  67
  68
  69 /*
  70  * print_express()  -  print express messages if there are any
  71  */
  72 void print_express(void) {
  73         char buf[256];
  74         FILE *outpipe;
  75
  76         if (express_msgs == 0) return;
  77         express_msgs = 0;
  78         serv_puts("PEXP");
  79         serv_gets(buf);
  80         if (buf[0]!='1') return;
  81
  82         if (strlen(rc_exp_cmd) > 0) {
  83                 outpipe = popen(rc_exp_cmd, "w");
  84                 if (outpipe != NULL) {
  85                         while (serv_gets(buf), strcmp(buf,"000")) {
  86                                 fprintf(outpipe, "%s\n", buf);
  87                                 }
  88                         pclose(outpipe);
  89                         return;
  90                         }
  91                 }
  92
  93         /* fall back to built-in express message display */
  94         if (rc_exp_beep) {
  95                 putc(7,stdout);
  96                 }
  97         color(1);
  98         printf("---\n");
  99         while (serv_gets(buf), strcmp(buf,"000")) {
 100                 printf("%s\n",buf);
 101                 }
 102         printf("---\n");
 103         color(7);
 104         }
 105
 106
 107 void set_keepalives(int s)
 108 {
 109         keepalives_enabled = (char)s;
 110         }
 111
 112 /*
 113  * This loop handles the "keepalive" messages sent to the server when idling.
 114  */
 115 void do_keepalive(void) {
 116         char buf[256];
 117         static time_t idlet = 0;
 118         time_t now;
 119
 120         time(&now);
 121         if ((now - idlet) < ((long)S_KEEPALIVE)) return;
 122         time(&idlet);
 123
 124         if (keepalives_enabled != KA_NO) {
 125                 serv_puts("NOOP");
 126                 if (keepalives_enabled == KA_YES) {
 127                         serv_gets(buf);
 128                         if (buf[3]=='*') {
 129                                 express_msgs = 1;
 130                                 if (ok_to_interrupt == 1) {
 131                                         printf("\r                    \r");
 132                                         print_express();
 133                                         printf("%s%c ",room_name,
 134                                                 room_prompt(room_flags));
 135                                         fflush(stdout);
 136                                         }
 137                                 }
 138                         }
 139                 }
 140         }
 141
 142
 143 int inkey(void) {               /* get a character from the keyboard, with   */
 144         int a;          /* the watchdog timer in effect if necessary */
 145         fd_set rfds;
 146         struct timeval tv;
 147         time_t start_time, now;
 148         char inbuf[2];
 149
 150         time(&start_time);
 151
 152         do {
 153
 154                 /* This loop waits for keyboard input.  If the keepalive
 155                  * timer expires, it sends a keepalive to the server if
 156                  * necessary and then waits again.
 157                  */
 158                 do {
 159                         do_keepalive();
 160                         fflush(stdout);
 161                         FD_ZERO(&rfds);
 162                         FD_SET(0,&rfds);
 163                         tv.tv_sec = S_KEEPALIVE;
 164                         tv.tv_usec = 0;
 165
 166                         time(&now);
 167                         if (((now-start_time) > SLEEPING)
 168                            && (SLEEPING != 0) && (getppid()==1)) {
 169                                 printf("Sleeping? Call again.\n");
 170                                 logoff(SIGALRM);
 171                                 }
 172
 173                         select(1, &rfds, NULL, NULL, &tv);
 174                         } while (!FD_ISSET(0, &rfds));
 175
 176
 177
 178
 179                 /* At this point, there's input, so fetch it.
 180                  * (There's a hole in the bucket...)
 181                  */
 182                 read(0, inbuf, 1);
 183                 a = inbuf[0];
 184                 if (a==127) a=8;
 185                 if (a>126) a=0;
 186                 if (a==10) a=13;
 187                 if (((a!=4)&&(a!=13)&&(a!=8)&&(a!=NEXT_KEY)&&(a!=STOP_KEY))
 188                         && ((a<32)||(a>126))) a=0;
 189                 } while(a==0);
 190         return(a);
 191         }
 192
 193 void getline(char *string, int lim)     /* Gets a line from the terminal */
 194                         /* Pointer to string buffer */
 195                         /* Maximum length - if negative, no-show */
 196 {
 197         int a,b;
 198         char flag = 0;
 199
 200         if (lim<0) { lim=(0-lim); flag=1; }
 201         strcpy(string,"");
 202         gl_string = string;
 203 GLA:    a=inkey(); a=(a&127);
 204         if ((a==8)&&(strlen(string)==0)) goto GLA;
 205         if ((a!=13)&&(a!=8)&&(strlen(string)==lim)) goto GLA;
 206         if ((a==8)&&(string[0]!=0)) {
 207                 string[strlen(string)-1]=0;
 208                 putc(8,stdout); putc(32,stdout); putc(8,stdout); goto GLA; }
 209         if ((a==13)||(a==10)) {
 210                 putc(13,stdout);
 211                 putc(10,stdout);
 212                 return;
 213                 }
 214         if (a<32) a='.';
 215         b=strlen(string);
 216         string[b]=a;
 217         string[b+1]=0;
 218         if (flag==0) putc(a,stdout);
 219         if (flag==1) putc('*',stdout);
 220         goto GLA;
 221         }
 222
 223
 224 /*
 225  * strprompt()  -  prompt for a string, print the existing value and
 226  *                 allow the user to press return to keep it...
 227  */
 228 void strprompt(char *prompt, char *str, int len)
 229 {
 230         char buf[128];
 231         print_express();
 232         color(3);
 233         printf("%s [", prompt);
 234         color(1);
 235         printf("%s", str);
 236         color(3);
 237         printf("]: ");
 238         color(2);
 239         getline(buf,len);
 240         color(7);
 241         if (buf[0]!=0) strcpy(str,buf);
 242         }
 243
 244 /*
 245  * intprompt()  -  like strprompt(), except for an integer
 246  *                 (note that it RETURNS the new value!)
 247  */
 248 int intprompt(char *prompt, int ival, int imin, int imax)
 249 {
 250         char buf[16];
 251         int i;
 252         i = ival;
 253         do {
 254                 sprintf(buf,"%d",i);
 255                 strprompt(prompt,buf,15);
 256                 i=atoi(buf);
 257                 if (i<imin) printf("*** Must be no less than %d.\n",imin);
 258                 if (i>imax) printf("*** Must be no more than %d.\n",imax);
 259                 } while((i<imin)||(i>imax));
 260         return(i);
 261         }
 262
 263 /*
 264  * newprompt()  -  prompt for a string with no existing value
 265  *                 (clears out string buffer first)
 266  */
 267 void newprompt(char *prompt, char *str, int len)
 268 {
 269         color(3);
 270         printf("%s",prompt);
 271         color(2);
 272         getline(str,len);
 273         color(7);
 274         }
 275
 276
 277 int lkey(void) {        /* returns a lower case value */
 278         int a;
 279         a=inkey();
 280         if (isupper(a)) a=tolower(a);
 281         return(a);
 282         }
 283
 284 /*
 285  * parse the citadel.rc file
 286  */
 287 void load_command_set(void) {
 288         FILE *ccfile;
 289         char buf[256];
 290         struct citcmd *cptr;
 291         struct citcmd *lastcmd = NULL;
 292         int a,d;
 293         int b = 0;
 294
 295
 296         /* first, set up some defaults for non-required variables */
 297
 298         strcpy(editor_path,"");
 299         strcpy(printcmd,"");
 300         strcpy(rc_username,"");
 301         strcpy(rc_password,"");
 302         rc_floor_mode = 0;
 303         rc_exp_beep = 1;
 304         rc_allow_attachments = 0;
 305         strcpy(rc_exp_cmd, "");
 306         rc_display_message_numbers = 0;
 307         rc_force_mail_prompts = 0;
 308
 309         /* now try to open the citadel.rc file */
 310
 311         ccfile = NULL;
 312         if (getenv("HOME") != NULL) {
 313                 sprintf(buf,"%s/.citadelrc",getenv("HOME"));
 314                 ccfile = fopen(buf,"r");
 315                 }
 316         if (ccfile==NULL) {
 317                 ccfile = fopen("/usr/local/lib/citadel.rc","r");
 318                 }
 319         if (ccfile==NULL) {
 320                 sprintf(buf,"%s/citadel.rc",BBSDIR);
 321                 ccfile = fopen(buf,"r");
 322                 }
 323         if (ccfile==NULL) {
 324                 perror("commands: cannot open citadel.rc");
 325                 logoff(errno);
 326                 }
 327
 328         while (fgets(buf, 256, ccfile) != NULL) {
 329             while ( (strlen(buf)>0) ? (isspace(buf[strlen(buf)-1])) : 0 )
 330                 buf[strlen(buf)-1] = 0;
 331
 332             if (!struncmp(buf,"editor=",7))
 333                 strcpy(editor_path,&buf[7]);
 334
 335             if (!struncmp(buf,"printcmd=",9))
 336                 strcpy(printcmd,&buf[9]);
 337
 338             if (!struncmp(buf,"expcmd=",7))
 339                 strcpy(rc_exp_cmd,&buf[7]);
 340
 341             if (!struncmp(buf,"local_screen_dimensions=",24))
 342                 have_xterm = (char)atoi(&buf[24]);
 343
 344             if (!struncmp(buf,"use_floors=",11)) {
 345                 if (!strucmp(&buf[11],"yes")) rc_floor_mode = RC_YES;
 346                 if (!strucmp(&buf[11],"no")) rc_floor_mode = RC_NO;
 347                 if (!strucmp(&buf[11],"default")) rc_floor_mode = RC_DEFAULT;
 348                 }
 349
 350             if (!struncmp(buf,"beep=",5)) {
 351                 rc_exp_beep = atoi(&buf[5]);
 352                 }
 353
 354             if (!struncmp(buf,"allow_attachments=", 18)) {
 355                 rc_allow_attachments = atoi(&buf[18]);
 356                 }
 357
 358             if (!struncmp(buf,"display_message_numbers=", 24)) {
 359                 rc_display_message_numbers = atoi(&buf[24]);
 360                 }
 361
 362             if (!struncmp(buf,"force_mail_prompts=", 19)) {
 363                 rc_force_mail_prompts = atoi(&buf[19]);
 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 = NULL;
 405                 if (cmdlist == NULL) cmdlist = cptr;
 406                 else lastcmd->next = cptr;
 407                 lastcmd = cptr;
 408                 }
 409             }
 410         fclose(ccfile);
 411         }
 412
 413
 414
 415 /*
 416  * return the key associated with a command
 417  */
 418 char keycmd(char *cmdstr)
 419 {
 420         int a;
 421
 422         for (a=0; a<strlen(cmdstr); ++a)
 423                 if (cmdstr[a]=='&')
 424                         return(tolower(cmdstr[a+1]));
 425         return(0);
 426         }
 427
 428
 429 /*
 430  * Output the string from a key command without the ampersand
 431  * "mode" should be set to 0 for normal or 1 for <C>ommand key highlighting
 432  */
 433 char *cmd_expand(char *strbuf, int mode)
 434 {
 435         int a;
 436         static char exp[64];
 437         char buf[256];
 438
 439         strcpy(exp,strbuf);
 440
 441         for (a=0; a<strlen(exp); ++a) {
 442                 if (strbuf[a] == '&') {
 443
 444                     if (mode == 0) {
 445                         strcpy(&exp[a],&exp[a+1]);
 446                         }
 447
 448                     if (mode == 1) {
 449                         exp[a] = '<';
 450                         strcpy(buf,&exp[a+2]);
 451                         exp[a+2] = '>';
 452                         exp[a+3] = 0;
 453                         strcat(exp,buf);
 454                         }
 455
 456                     }
 457
 458                 if (!strncmp(&exp[a],"^r",2)) {
 459                         strcpy(buf,exp);
 460                         strcpy(&exp[a],room_name);
 461                         strcat(exp,&buf[a+2]);
 462                         }
 463
 464                 if (!strncmp(&exp[a],"^c",2)) {
 465                         exp[a] = ',';
 466                         strcpy(&exp[a+1],&exp[a+2]);
 467                         }
 468
 469                 }
 470
 471         return(exp);
 472         }
 473
 474
 475
 476 /*
 477  * Comparison function to determine if entered commands match a
 478  * command loaded from the config file.
 479  */
 480 int cmdmatch(char *cmdbuf, struct citcmd *cptr, int ncomp)
 481 {
 482         int a;
 483         int cmdax;
 484
 485         cmdax = 0;
 486         if (is_room_aide) cmdax = 1;
 487         if (axlevel >=6) cmdax = 2;
 488
 489         for (a=0; a<ncomp; ++a) {
 490                 if ( (tolower(cmdbuf[a]) != keycmd(cptr->c_keys[a]))
 491                    || (cptr->c_axlevel > cmdax) )
 492                         return(0);
 493                 }
 494         return(1);
 495         }
 496
 497
 498 /*
 499  * This function returns 1 if a given command requires a string input
 500  */
 501 int requires_string(struct citcmd *cptr, int ncomp)
 502 {
 503         int a;
 504         char buf[64];
 505
 506         strcpy(buf,cptr->c_keys[ncomp-1]);
 507         for (a=0; a<strlen(buf); ++a) {
 508                 if (buf[a]==':') return(1);
 509                 }
 510         return(0);
 511         }
 512
 513
 514 /*
 515  * Input a command at the main prompt.
 516  * This function returns an integer command number.  If the command prompts
 517  * for a string then it is placed in the supplied buffer.
 518  */
 519 int getcmd(char *argbuf)
 520 {
 521         char cmdbuf[5];
 522         int cmdspaces[5];
 523         int cmdpos;
 524         int ch;
 525         int a;
 526         int got;
 527         int this_lazy_cmd;
 528         struct citcmd *cptr;
 529
 530         /* if we're running in idiot mode, display a cute little menu */
 531         IFNEXPERT formout("mainmenu");
 532
 533         print_express(); /* print express messages if there are any */
 534         strcpy(argbuf, "");
 535         cmdpos = 0;
 536         for (a=0; a<5; ++a) cmdbuf[a]=0;
 537         /* now the room prompt... */
 538         ok_to_interrupt = 1;
 539         printf("\n%s%c ",room_name,room_prompt(room_flags));
 540         fflush(stdout);
 541
 542         while(1) {
 543                 ch = inkey();
 544                 ok_to_interrupt = 0;
 545
 546                 /* Handle the backspace key, but only if there's something
 547                  * to backspace over...
 548                  */
 549                 if ( (ch == 8) && (cmdpos > 0) ) {
 550                         back(cmdspaces[cmdpos-1] + 1);
 551                         cmdbuf[cmdpos] = 0;
 552                         --cmdpos;
 553                         }
 554
 555                 /* Spacebar invokes "lazy traversal" commands */
 556                 if ( (ch == 32) && (cmdpos == 0) ) {
 557                         this_lazy_cmd = next_lazy_cmd;
 558                         if (this_lazy_cmd == 13) next_lazy_cmd = 5;
 559                         if (this_lazy_cmd == 5) next_lazy_cmd = 13;
 560                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 561                                 if (cptr->c_cmdnum == this_lazy_cmd) {
 562                                         for (a=0; a<5; ++a)
 563                                             if (cptr->c_keys[a][0] != 0)
 564                                                 printf("%s ", cmd_expand(
 565                                                         cptr->c_keys[a], 0));
 566                                         printf("\n");
 567                                         return(this_lazy_cmd);
 568                                         }
 569                                 }
 570                         printf("\n");
 571                         return(this_lazy_cmd);
 572                         }
 573
 574                 /* Otherwise, process the command */
 575                 cmdbuf[cmdpos] = tolower(ch);
 576
 577                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 578                         if (cmdmatch(cmdbuf,cptr,cmdpos+1)) {
 579
 580                                 printf("%s",cmd_expand(cptr->c_keys[cmdpos],0));
 581                                 cmdspaces[cmdpos] = strlen(
 582                                         cmd_expand(cptr->c_keys[cmdpos],0) );
 583                                 if (cmdpos<4)
 584                                         if ((cptr->c_keys[cmdpos+1]) != 0)
 585                                                 putc(' ',stdout);
 586                                 ++cmdpos;
 587                                 }
 588                         }
 589
 590                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 591                         if (cmdmatch(cmdbuf,cptr,5)) {
 592                                 /* We've found our command. */
 593                                 if (requires_string(cptr,cmdpos)) {
 594                                         getline(argbuf,32);
 595                                         }
 596                                 else {
 597                                         printf("\n");
 598                                         }
 599
 600                                 /* If this command is one that changes rooms,
 601                                  * then the next lazy-command (space bar)
 602                                  * should be "read new" instead of "goto"
 603                                  */
 604                                 if ((cptr->c_cmdnum==5)
 605                                         ||(cptr->c_cmdnum==6)
 606                                         ||(cptr->c_cmdnum==47)
 607                                         ||(cptr->c_cmdnum==52)
 608                                         ||(cptr->c_cmdnum==16)
 609                                         ||(cptr->c_cmdnum==20))
 610                                                 next_lazy_cmd = 13;
 611
 612                                 return(cptr->c_cmdnum);
 613
 614                                 }
 615                         }
 616
 617                 if (ch == '?') {
 618                         printf("\rOne of ...                         \n");
 619                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 620                             if (cmdmatch(cmdbuf,cptr,cmdpos)) {
 621                                 for (a=0; a<5; ++a) {
 622                                     printf("%s ",cmd_expand(cptr->c_keys[a],1));
 623                                     }
 624                                 printf("\n");
 625                                 }
 626                             }
 627
 628                         printf("\n%s%c ",room_name,room_prompt(room_flags));
 629                         got = 0;
 630                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 631                             if ((got==0)&&(cmdmatch(cmdbuf,cptr,cmdpos))) {
 632                                 for (a=0; a<cmdpos; ++a) {
 633                                     printf("%s ",
 634                                         cmd_expand(cptr->c_keys[a],0));
 635                                     }
 636                                 got = 1;
 637                                 }
 638                             }
 639                         }
 640
 641                 }
 642
 643         }
 644
 645
 646
 647
 648
 649 /*
 650  * set tty modes.  commands are:
 651  *
 652  * 0 - set to bbs mode, intr/quit disabled
 653  * 1 - set to bbs mode, intr/quit enabled
 654  * 2 - save current settings for later restoral
 655  * 3 - restore saved settings
 656  */
 657 #ifdef HAVE_TERMIOS_H
 658 void sttybbs(int cmd)           /* SysV version of sttybbs() */
 659          {
 660         struct termios live;
 661         static struct termios saved_settings;
 662         static int last_cmd = 0;
 663
 664         if (cmd == SB_LAST)
 665                 cmd = last_cmd;
 666         else
 667                 last_cmd = cmd;
 668
 669         if ( (cmd == 0) || (cmd == 1) ) {
 670                 tcgetattr(0,&live);
 671                 live.c_iflag=ISTRIP|IXON|IXANY;
 672                 live.c_oflag=OPOST|ONLCR;
 673                 live.c_lflag=ISIG|NOFLSH;
 674
 675                 if (cmd==SB_YES_INTR) {
 676                         live.c_cc[VINTR]=NEXT_KEY;
 677                         live.c_cc[VQUIT]=STOP_KEY;
 678                         signal(SIGINT,*sighandler);
 679                         signal(SIGQUIT,*sighandler);
 680                         }
 681                 else {
 682                         signal(SIGINT,SIG_IGN);
 683                         signal(SIGQUIT,SIG_IGN);
 684                         live.c_cc[VINTR]=(-1);
 685                         live.c_cc[VQUIT]=(-1);
 686                         }
 687
 688                 /* do we even need this stuff anymore? */
 689                 /* live.c_line=0; */
 690                 live.c_cc[VERASE]=8;
 691                 live.c_cc[VKILL]=24;
 692                 live.c_cc[VEOF]=1;
 693                 live.c_cc[VEOL]=255;
 694                 live.c_cc[VEOL2]=0;
 695                 live.c_cc[VSTART]=0;
 696                 tcsetattr(0,TCSADRAIN,&live);
 697                 }
 698         if (cmd == 2) {
 699                 tcgetattr(0,&saved_settings);
 700                 }
 701         if (cmd == 3) {
 702                 tcsetattr(0,TCSADRAIN,&saved_settings);
 703                 }
 704         }
 705 #else
 706 void sttybbs(int cmd)           /* BSD version of sttybbs() */
 707 {
 708         struct sgttyb live;
 709         static struct sgttyb saved_settings;
 710
 711         if ( (cmd == 0) || (cmd == 1) ) {
 712                 gtty(0,&live);
 713                 live.sg_flags |= CBREAK;
 714                 live.sg_flags |= CRMOD;
 715                 live.sg_flags |= NL1;
 716                 live.sg_flags &= ~ECHO;
 717                 if (cmd==1) live.sg_flags |= NOFLSH;
 718                 stty(0,&live);
 719                 }
 720         if (cmd == 2) {
 721                 gtty(0,&saved_settings);
 722                 }
 723         if (cmd == 3) {
 724                 stty(0,&saved_settings);
 725                 }
 726         }
 727 #endif
 728
 729
 730 /*
 731  * display_help()  -  help file viewer
 732  */
 733 void display_help(char *name)
 734 {
 735         formout(name);
 736         }
 737
 738
 739 /*
 740  * fmout()  -  Citadel text formatter and paginator
 741  */
 742 int fmout(int width, FILE *fp, char pagin, int height, int starting_lp, char subst)
 743                         /* screen width to use */
 744                         /* file to read from, or NULL to read from server */
 745                         /* nonzero if we should use the paginator */
 746                         /* screen height to use */
 747                         /* starting value for lines_printed, -1 for global */
 748                         /* nonzero if we should use hypertext mode */
 749         {
 750         int a,b,c,d,old;
 751         int real = (-1);
 752         char aaa[140];
 753         char buffer[512];
 754         int eof_flag = 0;
 755
 756         if (starting_lp >= 0) {
 757                 lines_printed = starting_lp;
 758                 }
 759         strcpy(aaa,""); old=255;
 760         strcpy(buffer,"");
 761         c=1; /* c is the current pos */
 762
 763         sigcaught = 0;
 764         sttybbs(1);
 765
 766 FMTA:   while ( (eof_flag==0) && (strlen(buffer)<126) ) {
 767                 if (sigcaught) goto OOPS;
 768                 if (fp!=NULL) { /* read from file */
 769                         if (feof(fp)) eof_flag = 1;
 770                         if (eof_flag==0) {
 771                                 a=getc(fp);
 772                                 buffer[strlen(buffer)+1] = 0;
 773                                 buffer[strlen(buffer)] = a;
 774                                 }
 775                         }
 776                 else {          /* read from server */
 777                         d=strlen(buffer);
 778                         serv_gets(&buffer[d]);
 779 while ( (!isspace(buffer[d])) && (isspace(buffer[strlen(buffer)-1])) )
 780         buffer[strlen(buffer)-1]=0;
 781                         if (!strcmp(&buffer[d],"000")) {
 782                                 buffer[d] = 0;
 783                                 eof_flag = 1;
 784                                 while(isspace(buffer[strlen(buffer)-1]))
 785                                         buffer[strlen(buffer)-1] = 0;
 786                                 }
 787                         d=strlen(buffer);
 788                         buffer[d] = 10;
 789                         buffer[d+1] = 0;
 790                         }
 791                 }
 792
 793         buffer[strlen(buffer)+1] = 0;
 794         a=buffer[0];
 795         strcpy(buffer,&buffer[1]);
 796
 797         old=real;
 798         real=a;
 799         if (a<=0) goto FMTEND;
 800
 801         if ( ((a==13)||(a==10)) && (old!=13) && (old!=10) ) a=32;
 802         if ( ((old==13)||(old==10)) && (isspace(real)) ) {
 803                 printf("\n");
 804                 ++lines_printed;
 805                 lines_printed = checkpagin(lines_printed,pagin,height);
 806                 c=1;
 807                 }
 808         if (a>126) goto FMTA;
 809
 810         if (a>32) {
 811         if ( ((strlen(aaa)+c)>(width-5)) && (strlen(aaa)>(width-5)) ) {
 812                 printf("\n%s",aaa); c=strlen(aaa); aaa[0]=0;
 813                 ++lines_printed;
 814                 lines_printed = checkpagin(lines_printed,pagin,height);
 815                 }
 816             b=strlen(aaa); aaa[b]=a; aaa[b+1]=0;
 817             }
 818         if (a==32) {
 819                 if ((strlen(aaa)+c)>(width-5)) {
 820                         c=1;
 821                         printf("\n");
 822                         ++lines_printed;
 823                         lines_printed = checkpagin(lines_printed,pagin,height);
 824                         }
 825                 printf("%s ",aaa); ++c; c=c+strlen(aaa);
 826                 strcpy(aaa,"");
 827                 goto FMTA;
 828                 }
 829         if ((a==13)||(a==10)) {
 830                 printf("%s\n",aaa);
 831                 c=1;
 832                 ++lines_printed;
 833                 lines_printed = checkpagin(lines_printed,pagin,height);
 834                 strcpy(aaa,"");
 835                 goto FMTA;
 836                 }
 837         goto FMTA;
 838
 839         /* signal caught; drain the server */
 840 OOPS:   do {
 841                 serv_gets(aaa);
 842                 } while(strcmp(aaa,"000"));
 843
 844 FMTEND: printf("\n");
 845         ++lines_printed;
 846         lines_printed = checkpagin(lines_printed,pagin,height);
 847         return(sigcaught);
 848 }
 849
 850
 851 /*
 852  * support ANSI color if defined
 853  */
 854 void color(int colornum)
 855 {
 856 #ifdef ANSI_COLOR
 857         if (enable_color) {
 858                 printf("\033[3%dm\033[1m", colornum);
 859                 fflush(stdout);
 860                 }
 861 #endif
 862         }
 863
 864 void cls(int colornum) {
 865 #ifdef ANSI_COLOR
 866         if (enable_color) {
 867                 printf("\033[4%dm\033[2J\033[H", colornum);
 868                 fflush(stdout);
 869                 }
 870 #endif
 871         }
 872
 873
 874 /*
 875  * Detect whether ANSI color is available (answerback)
 876  */
 877 void send_ansi_detect(void) {
 878 #ifdef ANSI_COLOR
 879         printf("\033[c");
 880         fflush(stdout);
 881         time(&AnsiDetect);
 882 #endif
 883         }
 884
 885 void look_for_ansi(void) {
 886 #ifdef ANSI_COLOR
 887         fd_set rfds;
 888         struct timeval tv;
 889         char abuf[512];
 890         time_t now;
 891         int a;
 892
 893         strcpy(abuf, "");
 894
 895         time(&now);
 896         if ( (now - AnsiDetect) < 2 ) sleep(1);
 897
 898         do {
 899                 FD_ZERO(&rfds);
 900                 FD_SET(0,&rfds);
 901                 tv.tv_sec = 0;
 902                 tv.tv_usec = 1;
 903
 904                 select(1, &rfds, NULL, NULL, &tv);
 905                 if (FD_ISSET(0, &rfds)) {
 906                         abuf[strlen(abuf)+1] = 0;
 907                         read(0, &abuf[strlen(abuf)], 1);
 908                         }
 909
 910                 } while (FD_ISSET(0, &rfds));
 911
 912         for (a=0; a<strlen(abuf); ++a) {
 913                 if ( (abuf[a] == 27) && (abuf[a+1] == '[')
 914                    && (abuf[a+2] == '?') ) {
 915                         enable_color = 1;
 916                         }
 917                 }
 918 #endif
 919         }