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 int rc_ansi_color;
  56
  57 char *gl_string;
  58 int next_lazy_cmd = 5;
  59
  60 struct citcmd *cmdlist = NULL;
  61
  62
  63 /* these variables are local to this module */
  64 char keepalives_enabled = KA_YES;       /* send NOOPs to server when idle */
  65 int ok_to_interrupt = 0;                /* print express msgs asynchronously */
  66 time_t AnsiDetect;                      /* when did we send the detect code? */
  67 int enable_color = 0;                   /* nonzero for ANSI color */
  68
  69
  70 /*
  71  * print_express()  -  print express messages if there are any
  72  */
  73 void print_express(void) {
  74         char buf[256];
  75         FILE *outpipe;
  76
  77         if (express_msgs == 0) return;
  78         express_msgs = 0;
  79         serv_puts("PEXP");
  80         serv_gets(buf);
  81         if (buf[0]!='1') return;
  82
  83         if (strlen(rc_exp_cmd) > 0) {
  84                 outpipe = popen(rc_exp_cmd, "w");
  85                 if (outpipe != NULL) {
  86                         while (serv_gets(buf), strcmp(buf,"000")) {
  87                                 fprintf(outpipe, "%s\n", buf);
  88                                 }
  89                         pclose(outpipe);
  90                         return;
  91                         }
  92                 }
  93
  94         /* fall back to built-in express message display */
  95         if (rc_exp_beep) {
  96                 putc(7,stdout);
  97                 }
  98         color(1);
  99         printf("---\n");
 100         while (serv_gets(buf), strcmp(buf,"000")) {
 101                 printf("%s\n",buf);
 102                 }
 103         printf("---\n");
 104         color(7);
 105         }
 106
 107
 108 void set_keepalives(int s)
 109 {
 110         keepalives_enabled = (char)s;
 111         }
 112
 113 /*
 114  * This loop handles the "keepalive" messages sent to the server when idling.
 115  */
 116 void do_keepalive(void) {
 117         char buf[256];
 118         static time_t idlet = 0;
 119         time_t now;
 120
 121         time(&now);
 122         if ((now - idlet) < ((long)S_KEEPALIVE)) return;
 123         time(&idlet);
 124
 125         if (keepalives_enabled != KA_NO) {
 126                 serv_puts("NOOP");
 127                 if (keepalives_enabled == KA_YES) {
 128                         serv_gets(buf);
 129                         if (buf[3]=='*') {
 130                                 express_msgs = 1;
 131                                 if (ok_to_interrupt == 1) {
 132                                         printf("\r                    \r");
 133                                         print_express();
 134                                         printf("%s%c ",room_name,
 135                                                 room_prompt(room_flags));
 136                                         fflush(stdout);
 137                                         }
 138                                 }
 139                         }
 140                 }
 141         }
 142
 143
 144 int inkey(void) {               /* get a character from the keyboard, with   */
 145         int a;          /* the watchdog timer in effect if necessary */
 146         fd_set rfds;
 147         struct timeval tv;
 148         time_t start_time, now;
 149         char inbuf[2];
 150
 151         time(&start_time);
 152
 153         do {
 154
 155                 /* This loop waits for keyboard input.  If the keepalive
 156                  * timer expires, it sends a keepalive to the server if
 157                  * necessary and then waits again.
 158                  */
 159                 do {
 160                         do_keepalive();
 161                         fflush(stdout);
 162                         FD_ZERO(&rfds);
 163                         FD_SET(0,&rfds);
 164                         tv.tv_sec = S_KEEPALIVE;
 165                         tv.tv_usec = 0;
 166
 167                         time(&now);
 168                         if (((now-start_time) > SLEEPING)
 169                            && (SLEEPING != 0) && (getppid()==1)) {
 170                                 printf("Sleeping? Call again.\n");
 171                                 logoff(SIGALRM);
 172                                 }
 173
 174                         select(1, &rfds, NULL, NULL, &tv);
 175                         } while (!FD_ISSET(0, &rfds));
 176
 177
 178
 179
 180                 /* At this point, there's input, so fetch it.
 181                  * (There's a hole in the bucket...)
 182                  */
 183                 read(0, inbuf, 1);
 184                 a = inbuf[0];
 185                 if (a==127) a=8;
 186                 if (a>126) a=0;
 187                 if (a==10) a=13;
 188                 if (((a!=4)&&(a!=13)&&(a!=8)&&(a!=NEXT_KEY)&&(a!=STOP_KEY))
 189                         && ((a<32)||(a>126))) a=0;
 190                 } while(a==0);
 191         return(a);
 192         }
 193
 194 void getline(char *string, int lim)     /* Gets a line from the terminal */
 195                         /* Pointer to string buffer */
 196                         /* Maximum length - if negative, no-show */
 197 {
 198         int a,b;
 199         char flag = 0;
 200
 201         if (lim<0) { lim=(0-lim); flag=1; }
 202         strcpy(string,"");
 203         gl_string = string;
 204 GLA:    a=inkey(); a=(a&127);
 205         if ((a==8)&&(strlen(string)==0)) goto GLA;
 206         if ((a!=13)&&(a!=8)&&(strlen(string)==lim)) goto GLA;
 207         if ((a==8)&&(string[0]!=0)) {
 208                 string[strlen(string)-1]=0;
 209                 putc(8,stdout); putc(32,stdout); putc(8,stdout); goto GLA; }
 210         if ((a==13)||(a==10)) {
 211                 putc(13,stdout);
 212                 putc(10,stdout);
 213                 return;
 214                 }
 215         if (a<32) a='.';
 216         b=strlen(string);
 217         string[b]=a;
 218         string[b+1]=0;
 219         if (flag==0) putc(a,stdout);
 220         if (flag==1) putc('*',stdout);
 221         goto GLA;
 222         }
 223
 224
 225 /*
 226  * strprompt()  -  prompt for a string, print the existing value and
 227  *                 allow the user to press return to keep it...
 228  */
 229 void strprompt(char *prompt, char *str, int len)
 230 {
 231         char buf[128];
 232         print_express();
 233         color(3);
 234         printf("%s [", prompt);
 235         color(1);
 236         printf("%s", str);
 237         color(3);
 238         printf("]: ");
 239         color(2);
 240         getline(buf,len);
 241         color(7);
 242         if (buf[0]!=0) strcpy(str,buf);
 243         }
 244
 245 /*
 246  * intprompt()  -  like strprompt(), except for an integer
 247  *                 (note that it RETURNS the new value!)
 248  */
 249 int intprompt(char *prompt, int ival, int imin, int imax)
 250 {
 251         char buf[16];
 252         int i;
 253         i = ival;
 254         do {
 255                 sprintf(buf,"%d",i);
 256                 strprompt(prompt,buf,15);
 257                 i=atoi(buf);
 258                 if (i<imin) printf("*** Must be no less than %d.\n",imin);
 259                 if (i>imax) printf("*** Must be no more than %d.\n",imax);
 260                 } while((i<imin)||(i>imax));
 261         return(i);
 262         }
 263
 264 /*
 265  * newprompt()  -  prompt for a string with no existing value
 266  *                 (clears out string buffer first)
 267  */
 268 void newprompt(char *prompt, char *str, int len)
 269 {
 270         color(3);
 271         printf("%s",prompt);
 272         color(2);
 273         getline(str,len);
 274         color(7);
 275         }
 276
 277
 278 int lkey(void) {        /* returns a lower case value */
 279         int a;
 280         a=inkey();
 281         if (isupper(a)) a=tolower(a);
 282         return(a);
 283         }
 284
 285 /*
 286  * parse the citadel.rc file
 287  */
 288 void load_command_set(void) {
 289         FILE *ccfile;
 290         char buf[256];
 291         struct citcmd *cptr;
 292         struct citcmd *lastcmd = NULL;
 293         int a,d;
 294         int b = 0;
 295
 296
 297         /* first, set up some defaults for non-required variables */
 298
 299         strcpy(editor_path,"");
 300         strcpy(printcmd,"");
 301         strcpy(rc_username,"");
 302         strcpy(rc_password,"");
 303         rc_floor_mode = 0;
 304         rc_exp_beep = 1;
 305         rc_allow_attachments = 0;
 306         strcpy(rc_exp_cmd, "");
 307         rc_display_message_numbers = 0;
 308         rc_force_mail_prompts = 0;
 309         rc_ansi_color = 0;
 310
 311         /* now try to open the citadel.rc file */
 312
 313         ccfile = NULL;
 314         if (getenv("HOME") != NULL) {
 315                 sprintf(buf,"%s/.citadelrc",getenv("HOME"));
 316                 ccfile = fopen(buf,"r");
 317                 }
 318         if (ccfile==NULL) {
 319                 ccfile = fopen("/usr/local/lib/citadel.rc","r");
 320                 }
 321         if (ccfile==NULL) {
 322                 sprintf(buf,"%s/citadel.rc",BBSDIR);
 323                 ccfile = fopen(buf,"r");
 324                 }
 325         if (ccfile==NULL) {
 326                 perror("commands: cannot open citadel.rc");
 327                 logoff(errno);
 328                 }
 329
 330         while (fgets(buf, 256, ccfile) != NULL) {
 331             while ( (strlen(buf)>0) ? (isspace(buf[strlen(buf)-1])) : 0 )
 332                 buf[strlen(buf)-1] = 0;
 333
 334             if (!struncmp(buf,"editor=",7))
 335                 strcpy(editor_path,&buf[7]);
 336
 337             if (!struncmp(buf,"printcmd=",9))
 338                 strcpy(printcmd,&buf[9]);
 339
 340             if (!struncmp(buf,"expcmd=",7))
 341                 strcpy(rc_exp_cmd,&buf[7]);
 342
 343             if (!struncmp(buf,"local_screen_dimensions=",24))
 344                 have_xterm = (char)atoi(&buf[24]);
 345
 346             if (!struncmp(buf,"use_floors=",11)) {
 347                 if (!strucmp(&buf[11],"yes")) rc_floor_mode = RC_YES;
 348                 if (!strucmp(&buf[11],"no")) rc_floor_mode = RC_NO;
 349                 if (!strucmp(&buf[11],"default")) rc_floor_mode = RC_DEFAULT;
 350                 }
 351
 352             if (!struncmp(buf,"beep=",5)) {
 353                 rc_exp_beep = atoi(&buf[5]);
 354                 }
 355
 356             if (!struncmp(buf,"allow_attachments=", 18)) {
 357                 rc_allow_attachments = atoi(&buf[18]);
 358                 }
 359
 360             if (!struncmp(buf,"display_message_numbers=", 24)) {
 361                 rc_display_message_numbers = atoi(&buf[24]);
 362                 }
 363
 364             if (!struncmp(buf,"force_mail_prompts=", 19)) {
 365                 rc_force_mail_prompts = atoi(&buf[19]);
 366                 }
 367
 368             if (!struncmp(buf,"ansi_color=", 11)) {
 369                 if (!strncasecmp(&buf[11], "on", 2))
 370                         rc_ansi_color = 1;
 371                 if (!strncasecmp(&buf[11], "auto", 4))
 372                         rc_ansi_color = 2;      /* autodetect */
 373                 }
 374
 375             if (!struncmp(buf,"username=",9))
 376                 strcpy(rc_username,&buf[9]);
 377
 378             if (!struncmp(buf,"password=",9))
 379                 strcpy(rc_password,&buf[9]);
 380
 381             if (!struncmp(buf,"cmd=",4)) {
 382                 strcpy(buf,&buf[4]);
 383
 384                 cptr = (struct citcmd *) malloc (sizeof(struct citcmd));
 385
 386                 cptr->c_cmdnum = atoi (buf);
 387                 for (d=strlen(buf); d>=0; --d)
 388                         if (buf[d]==',') b=d;
 389                 strcpy (buf, &buf[b+1]);
 390
 391                 cptr->c_axlevel = atoi (buf);
 392                 for (d=strlen(buf); d>=0; --d)
 393                         if (buf[d]==',') b=d;
 394                 strcpy (buf, &buf[b+1]);
 395
 396                 for (a=0; a<5; ++a) cptr->c_keys[a][0] = 0;
 397
 398                 a = 0;  b = 0;
 399                 buf[strlen(buf)+1] = 0;
 400                 while (strlen(buf) > 0) {
 401                         b = strlen(buf);
 402                         for (d=strlen(buf); d>=0; --d)
 403                                 if (buf[d]==',') b=d;
 404                         strncpy(cptr->c_keys[a],buf,b);
 405                         cptr->c_keys[a][b] = 0;
 406                         if (buf[b]==',')
 407                                 strcpy(buf,&buf[b+1]);
 408                         else
 409                                 strcpy(buf,"");
 410                         ++a;
 411                         }
 412
 413                 cptr->next = NULL;
 414                 if (cmdlist == NULL) cmdlist = cptr;
 415                 else lastcmd->next = cptr;
 416                 lastcmd = cptr;
 417                 }
 418             }
 419         fclose(ccfile);
 420         }
 421
 422
 423
 424 /*
 425  * return the key associated with a command
 426  */
 427 char keycmd(char *cmdstr)
 428 {
 429         int a;
 430
 431         for (a=0; a<strlen(cmdstr); ++a)
 432                 if (cmdstr[a]=='&')
 433                         return(tolower(cmdstr[a+1]));
 434         return(0);
 435         }
 436
 437
 438 /*
 439  * Output the string from a key command without the ampersand
 440  * "mode" should be set to 0 for normal or 1 for <C>ommand key highlighting
 441  */
 442 char *cmd_expand(char *strbuf, int mode)
 443 {
 444         int a;
 445         static char exp[64];
 446         char buf[256];
 447
 448         strcpy(exp,strbuf);
 449
 450         for (a=0; a<strlen(exp); ++a) {
 451                 if (strbuf[a] == '&') {
 452
 453                     if (mode == 0) {
 454                         strcpy(&exp[a],&exp[a+1]);
 455                         }
 456
 457                     if (mode == 1) {
 458                         exp[a] = '<';
 459                         strcpy(buf,&exp[a+2]);
 460                         exp[a+2] = '>';
 461                         exp[a+3] = 0;
 462                         strcat(exp,buf);
 463                         }
 464
 465                     }
 466
 467                 if (!strncmp(&exp[a],"^r",2)) {
 468                         strcpy(buf,exp);
 469                         strcpy(&exp[a],room_name);
 470                         strcat(exp,&buf[a+2]);
 471                         }
 472
 473                 if (!strncmp(&exp[a],"^c",2)) {
 474                         exp[a] = ',';
 475                         strcpy(&exp[a+1],&exp[a+2]);
 476                         }
 477
 478                 }
 479
 480         return(exp);
 481         }
 482
 483
 484
 485 /*
 486  * Comparison function to determine if entered commands match a
 487  * command loaded from the config file.
 488  */
 489 int cmdmatch(char *cmdbuf, struct citcmd *cptr, int ncomp)
 490 {
 491         int a;
 492         int cmdax;
 493
 494         cmdax = 0;
 495         if (is_room_aide) cmdax = 1;
 496         if (axlevel >=6) cmdax = 2;
 497
 498         for (a=0; a<ncomp; ++a) {
 499                 if ( (tolower(cmdbuf[a]) != keycmd(cptr->c_keys[a]))
 500                    || (cptr->c_axlevel > cmdax) )
 501                         return(0);
 502                 }
 503         return(1);
 504         }
 505
 506
 507 /*
 508  * This function returns 1 if a given command requires a string input
 509  */
 510 int requires_string(struct citcmd *cptr, int ncomp)
 511 {
 512         int a;
 513         char buf[64];
 514
 515         strcpy(buf,cptr->c_keys[ncomp-1]);
 516         for (a=0; a<strlen(buf); ++a) {
 517                 if (buf[a]==':') return(1);
 518                 }
 519         return(0);
 520         }
 521
 522
 523 /*
 524  * Input a command at the main prompt.
 525  * This function returns an integer command number.  If the command prompts
 526  * for a string then it is placed in the supplied buffer.
 527  */
 528 int getcmd(char *argbuf)
 529 {
 530         char cmdbuf[5];
 531         int cmdspaces[5];
 532         int cmdpos;
 533         int ch;
 534         int a;
 535         int got;
 536         int this_lazy_cmd;
 537         struct citcmd *cptr;
 538
 539         /* if we're running in idiot mode, display a cute little menu */
 540         IFNEXPERT formout("mainmenu");
 541
 542         print_express(); /* print express messages if there are any */
 543         strcpy(argbuf, "");
 544         cmdpos = 0;
 545         for (a=0; a<5; ++a) cmdbuf[a]=0;
 546         /* now the room prompt... */
 547         ok_to_interrupt = 1;
 548         printf("\n%s%c ",room_name,room_prompt(room_flags));
 549         fflush(stdout);
 550
 551         while(1) {
 552                 ch = inkey();
 553                 ok_to_interrupt = 0;
 554
 555                 /* Handle the backspace key, but only if there's something
 556                  * to backspace over...
 557                  */
 558                 if ( (ch == 8) && (cmdpos > 0) ) {
 559                         back(cmdspaces[cmdpos-1] + 1);
 560                         cmdbuf[cmdpos] = 0;
 561                         --cmdpos;
 562                         }
 563
 564                 /* Spacebar invokes "lazy traversal" commands */
 565                 if ( (ch == 32) && (cmdpos == 0) ) {
 566                         this_lazy_cmd = next_lazy_cmd;
 567                         if (this_lazy_cmd == 13) next_lazy_cmd = 5;
 568                         if (this_lazy_cmd == 5) next_lazy_cmd = 13;
 569                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 570                                 if (cptr->c_cmdnum == this_lazy_cmd) {
 571                                         for (a=0; a<5; ++a)
 572                                             if (cptr->c_keys[a][0] != 0)
 573                                                 printf("%s ", cmd_expand(
 574                                                         cptr->c_keys[a], 0));
 575                                         printf("\n");
 576                                         return(this_lazy_cmd);
 577                                         }
 578                                 }
 579                         printf("\n");
 580                         return(this_lazy_cmd);
 581                         }
 582
 583                 /* Otherwise, process the command */
 584                 cmdbuf[cmdpos] = tolower(ch);
 585
 586                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 587                         if (cmdmatch(cmdbuf,cptr,cmdpos+1)) {
 588
 589                                 printf("%s",cmd_expand(cptr->c_keys[cmdpos],0));
 590                                 cmdspaces[cmdpos] = strlen(
 591                                         cmd_expand(cptr->c_keys[cmdpos],0) );
 592                                 if (cmdpos<4)
 593                                         if ((cptr->c_keys[cmdpos+1]) != 0)
 594                                                 putc(' ',stdout);
 595                                 ++cmdpos;
 596                                 }
 597                         }
 598
 599                 for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 600                         if (cmdmatch(cmdbuf,cptr,5)) {
 601                                 /* We've found our command. */
 602                                 if (requires_string(cptr,cmdpos)) {
 603                                         getline(argbuf,32);
 604                                         }
 605                                 else {
 606                                         printf("\n");
 607                                         }
 608
 609                                 /* If this command is one that changes rooms,
 610                                  * then the next lazy-command (space bar)
 611                                  * should be "read new" instead of "goto"
 612                                  */
 613                                 if ((cptr->c_cmdnum==5)
 614                                         ||(cptr->c_cmdnum==6)
 615                                         ||(cptr->c_cmdnum==47)
 616                                         ||(cptr->c_cmdnum==52)
 617                                         ||(cptr->c_cmdnum==16)
 618                                         ||(cptr->c_cmdnum==20))
 619                                                 next_lazy_cmd = 13;
 620
 621                                 return(cptr->c_cmdnum);
 622
 623                                 }
 624                         }
 625
 626                 if (ch == '?') {
 627                         printf("\rOne of ...                         \n");
 628                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 629                             if (cmdmatch(cmdbuf,cptr,cmdpos)) {
 630                                 for (a=0; a<5; ++a) {
 631                                     printf("%s ",cmd_expand(cptr->c_keys[a],1));
 632                                     }
 633                                 printf("\n");
 634                                 }
 635                             }
 636
 637                         printf("\n%s%c ",room_name,room_prompt(room_flags));
 638                         got = 0;
 639                         for (cptr = cmdlist; cptr != NULL; cptr = cptr->next) {
 640                             if ((got==0)&&(cmdmatch(cmdbuf,cptr,cmdpos))) {
 641                                 for (a=0; a<cmdpos; ++a) {
 642                                     printf("%s ",
 643                                         cmd_expand(cptr->c_keys[a],0));
 644                                     }
 645                                 got = 1;
 646                                 }
 647                             }
 648                         }
 649
 650                 }
 651
 652         }
 653
 654
 655
 656
 657
 658 /*
 659  * set tty modes.  commands are:
 660  *
 661  * 0 - set to bbs mode, intr/quit disabled
 662  * 1 - set to bbs mode, intr/quit enabled
 663  * 2 - save current settings for later restoral
 664  * 3 - restore saved settings
 665  */
 666 #ifdef HAVE_TERMIOS_H
 667 void sttybbs(int cmd)           /* SysV version of sttybbs() */
 668          {
 669         struct termios live;
 670         static struct termios saved_settings;
 671         static int last_cmd = 0;
 672
 673         if (cmd == SB_LAST)
 674                 cmd = last_cmd;
 675         else
 676                 last_cmd = cmd;
 677
 678         if ( (cmd == 0) || (cmd == 1) ) {
 679                 tcgetattr(0,&live);
 680                 live.c_iflag=ISTRIP|IXON|IXANY;
 681                 live.c_oflag=OPOST|ONLCR;
 682                 live.c_lflag=ISIG|NOFLSH;
 683
 684                 if (cmd==SB_YES_INTR) {
 685                         live.c_cc[VINTR]=NEXT_KEY;
 686                         live.c_cc[VQUIT]=STOP_KEY;
 687                         signal(SIGINT,*sighandler);
 688                         signal(SIGQUIT,*sighandler);
 689                         }
 690                 else {
 691                         signal(SIGINT,SIG_IGN);
 692                         signal(SIGQUIT,SIG_IGN);
 693                         live.c_cc[VINTR]=(-1);
 694                         live.c_cc[VQUIT]=(-1);
 695                         }
 696
 697                 /* do we even need this stuff anymore? */
 698                 /* live.c_line=0; */
 699                 live.c_cc[VERASE]=8;
 700                 live.c_cc[VKILL]=24;
 701                 live.c_cc[VEOF]=1;
 702                 live.c_cc[VEOL]=255;
 703                 live.c_cc[VEOL2]=0;
 704                 live.c_cc[VSTART]=0;
 705                 tcsetattr(0,TCSADRAIN,&live);
 706                 }
 707         if (cmd == 2) {
 708                 tcgetattr(0,&saved_settings);
 709                 }
 710         if (cmd == 3) {
 711                 tcsetattr(0,TCSADRAIN,&saved_settings);
 712                 }
 713         }
 714 #else
 715 void sttybbs(int cmd)           /* BSD version of sttybbs() */
 716 {
 717         struct sgttyb live;
 718         static struct sgttyb saved_settings;
 719
 720         if ( (cmd == 0) || (cmd == 1) ) {
 721                 gtty(0,&live);
 722                 live.sg_flags |= CBREAK;
 723                 live.sg_flags |= CRMOD;
 724                 live.sg_flags |= NL1;
 725                 live.sg_flags &= ~ECHO;
 726                 if (cmd==1) live.sg_flags |= NOFLSH;
 727                 stty(0,&live);
 728                 }
 729         if (cmd == 2) {
 730                 gtty(0,&saved_settings);
 731                 }
 732         if (cmd == 3) {
 733                 stty(0,&saved_settings);
 734                 }
 735         }
 736 #endif
 737
 738
 739 /*
 740  * display_help()  -  help file viewer
 741  */
 742 void display_help(char *name)
 743 {
 744         formout(name);
 745         }
 746
 747
 748 /*
 749  * fmout()  -  Citadel text formatter and paginator
 750  */
 751 int fmout(int width, FILE *fp, char pagin, int height, int starting_lp, char subst)
 752                         /* screen width to use */
 753                         /* file to read from, or NULL to read from server */
 754                         /* nonzero if we should use the paginator */
 755                         /* screen height to use */
 756                         /* starting value for lines_printed, -1 for global */
 757                         /* nonzero if we should use hypertext mode */
 758         {
 759         int a,b,c,d,old;
 760         int real = (-1);
 761         char aaa[140];
 762         char buffer[512];
 763         int eof_flag = 0;
 764
 765         if (starting_lp >= 0) {
 766                 lines_printed = starting_lp;
 767                 }
 768         strcpy(aaa,""); old=255;
 769         strcpy(buffer,"");
 770         c=1; /* c is the current pos */
 771
 772         sigcaught = 0;
 773         sttybbs(1);
 774
 775 FMTA:   while ( (eof_flag==0) && (strlen(buffer)<126) ) {
 776                 if (sigcaught) goto OOPS;
 777                 if (fp!=NULL) { /* read from file */
 778                         if (feof(fp)) eof_flag = 1;
 779                         if (eof_flag==0) {
 780                                 a=getc(fp);
 781                                 buffer[strlen(buffer)+1] = 0;
 782                                 buffer[strlen(buffer)] = a;
 783                                 }
 784                         }
 785                 else {          /* read from server */
 786                         d=strlen(buffer);
 787                         serv_gets(&buffer[d]);
 788 while ( (!isspace(buffer[d])) && (isspace(buffer[strlen(buffer)-1])) )
 789         buffer[strlen(buffer)-1]=0;
 790                         if (!strcmp(&buffer[d],"000")) {
 791                                 buffer[d] = 0;
 792                                 eof_flag = 1;
 793                                 while(isspace(buffer[strlen(buffer)-1]))
 794                                         buffer[strlen(buffer)-1] = 0;
 795                                 }
 796                         d=strlen(buffer);
 797                         buffer[d] = 10;
 798                         buffer[d+1] = 0;
 799                         }
 800                 }
 801
 802         buffer[strlen(buffer)+1] = 0;
 803         a=buffer[0];
 804         strcpy(buffer,&buffer[1]);
 805
 806         old=real;
 807         real=a;
 808         if (a<=0) goto FMTEND;
 809
 810         if ( ((a==13)||(a==10)) && (old!=13) && (old!=10) ) a=32;
 811         if ( ((old==13)||(old==10)) && (isspace(real)) ) {
 812                 printf("\n");
 813                 ++lines_printed;
 814                 lines_printed = checkpagin(lines_printed,pagin,height);
 815                 c=1;
 816                 }
 817         if (a>126) goto FMTA;
 818
 819         if (a>32) {
 820         if ( ((strlen(aaa)+c)>(width-5)) && (strlen(aaa)>(width-5)) ) {
 821                 printf("\n%s",aaa); c=strlen(aaa); aaa[0]=0;
 822                 ++lines_printed;
 823                 lines_printed = checkpagin(lines_printed,pagin,height);
 824                 }
 825             b=strlen(aaa); aaa[b]=a; aaa[b+1]=0;
 826             }
 827         if (a==32) {
 828                 if ((strlen(aaa)+c)>(width-5)) {
 829                         c=1;
 830                         printf("\n");
 831                         ++lines_printed;
 832                         lines_printed = checkpagin(lines_printed,pagin,height);
 833                         }
 834                 printf("%s ",aaa); ++c; c=c+strlen(aaa);
 835                 strcpy(aaa,"");
 836                 goto FMTA;
 837                 }
 838         if ((a==13)||(a==10)) {
 839                 printf("%s\n",aaa);
 840                 c=1;
 841                 ++lines_printed;
 842                 lines_printed = checkpagin(lines_printed,pagin,height);
 843                 strcpy(aaa,"");
 844                 goto FMTA;
 845                 }
 846         goto FMTA;
 847
 848         /* signal caught; drain the server */
 849 OOPS:   do {
 850                 serv_gets(aaa);
 851                 } while(strcmp(aaa,"000"));
 852
 853 FMTEND: printf("\n");
 854         ++lines_printed;
 855         lines_printed = checkpagin(lines_printed,pagin,height);
 856         return(sigcaught);
 857 }
 858
 859
 860 /*
 861  * support ANSI color if defined
 862  */
 863 void color(int colornum)
 864 {
 865         if (enable_color) {
 866                 printf("\033[3%dm", colornum);
 867                 /* printf("\033[1m"); */ /* uncomment for bold colours */
 868                 fflush(stdout);
 869                 }
 870         }
 871
 872 void cls(int colornum) {
 873         if (enable_color) {
 874                 printf("\033[4%dm\033[2J\033[H", colornum);
 875                 fflush(stdout);
 876                 }
 877         }
 878
 879
 880 /*
 881  * Detect whether ANSI color is available (answerback)
 882  */
 883 void send_ansi_detect(void) {
 884         if (rc_ansi_color == 2) {
 885                 printf("\033[c");
 886                 fflush(stdout);
 887                 time(&AnsiDetect);
 888                 }
 889         }
 890
 891 void look_for_ansi(void) {
 892         fd_set rfds;
 893         struct timeval tv;
 894         char abuf[512];
 895         time_t now;
 896         int a;
 897
 898         if (rc_ansi_color == 0) {
 899                 enable_color = 0;
 900                 }
 901         else if (rc_ansi_color == 1) {
 902                 enable_color = 1;
 903                 }
 904
 905         /* otherwise, do the auto-detect */
 906
 907         strcpy(abuf, "");
 908
 909         time(&now);
 910         if ( (now - AnsiDetect) < 2 ) sleep(1);
 911
 912         do {
 913                 FD_ZERO(&rfds);
 914                 FD_SET(0,&rfds);
 915                 tv.tv_sec = 0;
 916                 tv.tv_usec = 1;
 917
 918                 select(1, &rfds, NULL, NULL, &tv);
 919                 if (FD_ISSET(0, &rfds)) {
 920                         abuf[strlen(abuf)+1] = 0;
 921                         read(0, &abuf[strlen(abuf)], 1);
 922                         }
 923
 924                 } while (FD_ISSET(0, &rfds));
 925
 926         for (a=0; a<strlen(abuf); ++a) {
 927                 if ( (abuf[a] == 27) && (abuf[a+1] == '[')
 928                    && (abuf[a+2] == '?') ) {
 929                         enable_color = 1;
 930                         }
 931                 }
 932         }