wsi.ml

   1 type cursor =
   2     | CURSOR_INHERIT
   3     | CURSOR_INFO
   4     | CURSOR_CYCLE
   5     | CURSOR_CROSSHAIR
   6     | CURSOR_TEXT
   7 ;;
   8
   9 external cloexec : Unix.file_descr -> unit = "ml_cloexec";;
  10 external glx : int -> unit = "ml_glx";;
  11 external swapb : unit -> unit = "ml_swapb";;
  12 external hasdata : Unix.file_descr -> bool = "ml_hasdata";;
  13 external toutf8 : int -> string = "ml_keysymtoutf8";;
  14
  15 let dolog fmt = Format.kprintf prerr_endline fmt;;
  16 let vlog fmt = Format.kprintf ignore fmt;;
  17
  18 exception Quit;;
  19
  20 let onot = object
  21     method display = ()
  22     method reshape _ _ = ()
  23     method mouse _ _ _ _ _ = ()
  24     method motion _ _ = ()
  25     method pmotion _ _ = ()
  26     method key _ _ = ()
  27     method enter _ _ = ()
  28     method leave = ()
  29 end;;
  30
  31 class type t = object
  32   method display : unit
  33   method reshape : int -> int -> unit
  34   method mouse : int -> bool -> int -> int -> int -> unit
  35   method motion : int -> int -> unit
  36   method pmotion : int -> int -> unit
  37   method key : int -> int -> unit
  38   method enter : int -> int -> unit
  39   method leave : unit
  40 end;;
  41
  42 type state =
  43     { mutable mink : int
  44     ; mutable maxk : int
  45     ; mutable keymap : int array array
  46     ; fifo : (string -> unit) Queue.t
  47     ; mutable seq : int
  48     ; mutable protoatom : int
  49     ; mutable deleatom : int
  50     ; mutable idbase : int
  51     ; mutable fullscreen : (int -> unit)
  52     ; mutable stringatom : int
  53     ; mutable t : t
  54     ; mutable sock : Unix.file_descr
  55     ; mutable w : int
  56     ; mutable h : int
  57     ; mutable fs : bool
  58     ; mutable parent : int
  59     }
  60 ;;
  61
  62 let state =
  63   { mink = max_int
  64   ; maxk = min_int
  65   ; keymap = [||]
  66   ; fifo = Queue.create ()
  67   ; seq = 0
  68   ; protoatom = -1
  69   ; deleatom = -1
  70   ; idbase = -1
  71   ; fullscreen = (fun _ -> ())
  72   ; sock = Unix.stdin
  73   ; t = onot
  74   ; w = -1
  75   ; h = -1
  76   ; fs = false
  77   ; stringatom = 31
  78   ; parent = -1
  79   }
  80 ;;
  81
  82 let w8 s pos i = String.set s pos (Char.chr (i land 0xff));;
  83
  84 let w16 s pos i =
  85   w8 s pos i;
  86   w8 s (pos+1) (i lsr 8);
  87 ;;
  88
  89 let w32 s pos i =
  90   w16 s pos i;
  91   w16 s (pos+2) (i lsr 16);
  92 ;;
  93
  94 let r16 s pos =
  95   let rb pos1 = Char.code (String.get s (pos + pos1)) in
  96   (rb 0) lor ((rb 1) lsl 8)
  97 ;;
  98
  99 let r16s s pos =
 100   let i = r16 s pos in
 101   i - ((i land 0x8000) lsl 1);
 102 ;;
 103
 104 let r8 s pos = Char.code (String.get s pos);;
 105
 106 let r32 s pos =
 107   let rb pos1 = Char.code (String.get s (pos + pos1)) in
 108   let l = (rb 0) lor ((rb 1) lsl 8)
 109   and u = (rb 2) lor ((rb 3) lsl 8) in
 110   (u lsl 16) lor l
 111 ;;
 112
 113 let error fmt = Printf.kprintf failwith fmt;;
 114
 115 let readstr sock n =
 116   let s = String.create n in
 117   let rec loop pos n =
 118     let m = Unix.read sock s pos n in
 119     if n != m
 120     then (
 121       ignore (Unix.select [sock] [] [] 0.01);
 122       loop (pos + m) (n - m)
 123     )
 124       (* error "read %d returned %d" n m; *)
 125   in
 126   loop 0 n;
 127   s;
 128 ;;
 129
 130 let sendstr s ?(pos=0) ?(len=String.length s) sock =
 131   vlog "%d => %S" state.seq s;
 132   state.seq <- state.seq + 1;
 133   let n = Unix.send sock s pos len [] in
 134   if n != len
 135   then error "send %d returned %d" len n;
 136 ;;
 137
 138 let updkmap sock resp =
 139   let syms = r8 resp 1 in
 140   let len = r32 resp 4 in
 141   let data =
 142     if len > 0
 143     then readstr sock (4*len)
 144     else ""
 145   in
 146   let m = len / syms in
 147   state.keymap <- Array.make_matrix
 148     (state.maxk - state.mink) syms 0xffffff;
 149   let rec loop i = if i = m then () else
 150       let k = i*4*syms in
 151       let rec loop2 k l = if l = syms then () else
 152           let v = r32 data k in
 153           state.keymap.(i).(l) <- v;
 154           loop2 (k+4) (l+1)
 155       in
 156       loop2 k 0;
 157       loop (i+1);
 158   in
 159   loop 0;
 160 ;;
 161
 162 let sendwithrep sock s f =
 163   Queue.push f state.fifo;
 164   sendstr s sock;
 165 ;;
 166
 167 let padcatl ss =
 168   let b = Buffer.create 16 in
 169   List.iter (Buffer.add_string b) ss;
 170   let bl = Buffer.length b in
 171   let pl = bl land 3 in
 172   if pl != 0
 173   then (
 174     let pad = "123" in
 175     Buffer.add_substring b pad 0 (4 - pl);
 176   );
 177   Buffer.contents b;
 178 ;;
 179
 180 let padcat s1 s2 = padcatl [s1; s2];;
 181
 182 let internreq name onlyifexists =
 183   let s = "\016\000\000\000\000\000\000\000" in
 184   let s = padcat s name in
 185   w8 s 1 (if onlyifexists then 1 else 0);
 186   w16 s 2 (String.length s / 4);
 187   w16 s 4 (String.length name);
 188   s;
 189 ;;
 190
 191 let sendintern sock s onlyifexists f =
 192   let s = internreq s onlyifexists in
 193   sendwithrep sock s f;
 194 ;;
 195
 196 let createwindowreq wid parent x y w h bw mask =
 197   let s = "\001\000\009\000wwwwppppxxyywwhhbwccvvvvmmmmeeee" in
 198   w32 s 4 wid;
 199   w32 s 8 parent;
 200   w16 s 12 x;
 201   w16 s 14 y;
 202   w16 s 16 w;
 203   w16 s 18 h;
 204   w16 s 20 bw;
 205   w16 s 22 1;
 206   w32 s 24 0;
 207   w32 s 28 0x800;                       (* eventmask *)
 208   w32 s 32 mask;
 209   s;
 210 ;;
 211
 212 let mapreq wid =
 213   let s = "\008u\002\000wwww" in
 214   w32 s 4 wid;
 215   s;
 216 ;;
 217
 218 let getkeymapreq first count =
 219   let s = "\101u\002\000fcuu" in
 220   w8 s 4 first;
 221   w8 s 5 count;
 222   s;
 223 ;;
 224
 225 let changepropreq wid prop typ format props =
 226   let s = "\018\000llwwwwppppttttfuuuLLLL" in
 227   let s = padcat s props in
 228   w16 s 2 (String.length s / 4);
 229   w32 s 4 wid;
 230   w32 s 8 prop;
 231   w32 s 12 typ;
 232   w8 s 16 format;
 233   let ful = String.length props / (match format with
 234     | 8 -> 1
 235     | 16 -> 2
 236     | 32 -> 4
 237     | n -> error "no idea what %d means" n)
 238   in
 239   w32 s 20 ful;
 240   s;
 241 ;;
 242
 243 let openfontreq fid name =
 244   let s = "\045ullffffnnuu" in
 245   let s = padcat s name in
 246   w16 s 2 (String.length s / 4);
 247   w32 s 4 fid;
 248   w16 s 8 (String.length name);
 249   s;
 250 ;;
 251
 252 let createglyphcursorreq fid cid cindex =
 253   let s = "\094u\008\000ccccffffffffssmmrrggbbRRGGBB" in
 254   w32 s 4 cid;
 255   w32 s 8 fid;
 256   w32 s 12 fid;
 257   w16 s 16 cindex;
 258   w16 s 18 (cindex+1);
 259   w16 s 20 0;
 260   w16 s 22 0;
 261   w16 s 24 0;
 262   w16 s 26 0xffff;
 263   w16 s 28 0xffff;
 264   w16 s 30 0xffff;
 265   s;
 266 ;;
 267
 268 let mapwindowreq wid =
 269   let s = "\008u\002\000wwww" in
 270   w32 s 4 wid;
 271   s;
 272 ;;
 273
 274 let changewindowattributesreq wid mask attrs =
 275   let s = "\002ullwwwwmmmm" in
 276   let s = padcat s attrs in
 277   w16 s 2 (String.length s / 4);
 278   w32 s 4 wid;
 279   w32 s 8 mask;
 280   s;
 281 ;;
 282
 283 let configurewindowreq wid mask values =
 284   let s = "\012ullwwwwmmuu" in
 285   let s = padcat s values in
 286   w16 s 2 (String.length s / 4);
 287   w32 s 4 wid;
 288   w16 s 8 mask;
 289   s;
 290 ;;
 291
 292 let s32 n =
 293   let s = "1234" in
 294   w32 s 0 n;
 295   s;
 296 ;;
 297
 298 let clientmessage format seq wid typ data =
 299   let s = "\033fsswwwwtttt" in
 300   let s = padcat s data in
 301   w8 s 1 format;
 302   w16 s 2 seq;
 303   w32 s 4 wid;
 304   w32 s 8 typ;
 305   s;
 306 ;;
 307
 308 let sendeventreq propagate destwid mask data =
 309   let s = "\025p\011\000wwwwmmmm" in
 310   let s = padcat s data in
 311   w8 s 1 propagate;
 312   w32 s 4 destwid;
 313   w32 s 8 mask;
 314   s;
 315 ;;
 316
 317 let readresp sock =
 318   let resp = readstr sock 32 in
 319   let opcode = r8 resp 0 in
 320   match opcode land lnot 0x80 with
 321   | 0 ->                                (* error *)
 322       let s = resp in
 323       let code = r8 s 1
 324       and serial = r16 s 2
 325       and resid = r32 resp 4
 326       and min = r16 s 8
 327       and maj = r8 s 10 in
 328       error "code=%d serial=%d resid=%#x min=%d maj=%d\n%S"
 329         code serial resid min maj resp;
 330
 331   | 1 ->                                (* response *)
 332       let rep = Queue.pop state.fifo in
 333       rep resp;
 334
 335   | 2 ->                                (* key press *)
 336       if Array.length state.keymap > 0
 337       then
 338         let code = r8 resp  1 in
 339         let mask = r16 resp 28 in
 340         let index = (mask land 1) lxor ((mask land 2) lsr 1) in
 341         let keysym = state.keymap.(code-state.mink).(index) in
 342         vlog "keysym = %x %c" keysym (Char.unsafe_chr keysym);
 343         state.t#key keysym mask;
 344
 345   | 3 ->                                (* key release *)
 346       if Array.length state.keymap > 0
 347       then
 348         let code = r8 resp 1 in
 349         let mask = r16 resp 28 in
 350         let index = (mask land 1) lxor ((mask land 2) lsr 1) in
 351         let keysym = state.keymap.(code-state.mink).(index) in
 352         vlog "release keysym = %x %c mask %#x"
 353           keysym (Char.unsafe_chr keysym) mask
 354
 355   | 4 ->                                (* buttonpress *)
 356       let n = r8 resp 1
 357       and x = r16s resp 24
 358       and y = r16s resp 26
 359       and m = r16 resp 28 in
 360       state.t#mouse n true x y m;
 361       vlog "press %d" n
 362
 363   | 5 ->                                (* buttonrelease *)
 364       let n = r8 resp 1
 365       and x = r16s resp 24
 366       and y = r16s resp 26
 367       and m = r16 resp 28 in
 368       state.t#mouse n false x y m;
 369       vlog "release %d %d %d" n x y
 370
 371   | 6 ->                                (* motion *)
 372       let x = r16s resp 24 in
 373       let y = r16s resp 26 in
 374       let m = r16 resp 28 in
 375       if m land 0x1f00 = 0
 376       then state.t#pmotion x y
 377       else state.t#motion x y;
 378       vlog "move %dx%d => %d" x y m
 379
 380   | 7 ->                                (* enter *)
 381       let x = r16s resp 24
 382       and y = r16s resp 26 in
 383       state.t#enter x y;
 384       vlog "enter %d %d" x y
 385
 386   | 8 ->                                (* leave *)
 387       state.t#leave
 388
 389   | 18 -> vlog "unmap";
 390
 391   | 19 ->                               (* map *)
 392       if state.parent = -1 && state.w > 0 && state.h > 0
 393       then state.t#reshape state.w state.h;
 394       state.t#display;
 395       vlog "map";
 396
 397   | 12 ->                               (* exposure *)
 398       vlog "exposure";
 399       state.t#display
 400
 401   | 15 ->                               (* visibility *)
 402       let vis = r8 resp 8 in
 403       if vis != 2 then state.t#display;
 404       vlog "visibility %d" vis;
 405
 406   | 34 ->                               (* mapping *)
 407       state.keymap <- [||];
 408       let s = getkeymapreq state.mink (state.maxk-state.mink-1) in
 409       sendwithrep sock s (updkmap sock);
 410
 411   | 33 ->                               (* clientmessage *)
 412       let atom = r32 resp 8 in
 413       if atom = state.protoatom
 414       then (
 415         let atom = r32 resp 12 in
 416         if atom = state.deleatom
 417         then raise Quit;
 418       );
 419       vlog "atom %#x" atom
 420
 421   | 21 ->                               (* reparent *)
 422       state.parent <- r32 resp 24;
 423       state.w <- -1;
 424       state.h <- -1;
 425       vlog "reparent"
 426
 427   | 22 ->                               (* configure *)
 428       vlog "configure";
 429       let w = r16 resp 20
 430       and h = r16 resp 22 in
 431       if w != state.w || h != state.h
 432       then (
 433         state.w <- w;
 434         state.h <- h;
 435         state.t#reshape w h;
 436       );
 437
 438   | n ->
 439       dolog "event %d %S" n resp
 440 ;;
 441
 442 let readresp sock =
 443   let rec loop () =
 444     readresp sock;
 445     if hasdata sock then loop ();
 446   in
 447   loop ();
 448 ;;
 449
 450 let hexstr s =
 451   let b = Buffer.create 16 in
 452   String.iter (fun c ->
 453     Buffer.add_string b (Printf.sprintf "%02x" (Char.code c))) s;
 454   Buffer.contents b;
 455 ;;
 456
 457 let reshape w h =
 458   if state.fs
 459   then
 460     state.fullscreen state.idbase
 461   ;
 462   let s = "wwuuhhuu" in
 463   w32 s 0 w;
 464   w32 s 4 h;
 465   let s = configurewindowreq state.idbase 0x000c s in
 466   vlog "reshape %d %s %d" state.seq (hexstr s) (String.length s);
 467   sendstr s state.sock;
 468 ;;
 469
 470 let setup sock screennum w h =
 471   let s = readstr sock 2 in
 472   let n = String.length s in
 473   if n != 2
 474   then error "failed to read X connection setup response n=%d" n;
 475   match s.[0] with
 476   | '\000' ->
 477       let reasonlen = r8 s 1 in
 478       let s = readstr sock 6 in
 479       let maj = r16 s 0
 480       and min = r16 s 2
 481       and add = r16 s 4 in
 482       let len = add*4 in
 483       let data = readstr sock len in
 484       let reason = String.sub data 0 reasonlen in
 485       error "X connection failed maj=%d min=%d reason=%S"
 486         maj min reason
 487
 488   | '\002' -> failwith "X connection setup failed: authentication required";
 489
 490   | '\001' ->
 491       let s       = readstr sock 38 in
 492       let maj     = r16 s 0
 493       and min     = r16 s 2
 494       and add     = r16 s 4
 495       and idbase  = r32 s 10
 496       and idmask  = r32 s 14
 497       and vlen    = r16 s 22
 498       and screens = r8 s 26
 499       and formats = r8 s 27
 500       and minkk   = r8 s 32
 501       and maxkk   = r8 s 33 in
 502       let data = readstr sock (4*add-32) in
 503       let vendor = String.sub data 0 vlen in
 504       let pos = ((vlen+3) land lnot 3) + formats*8 in
 505
 506       if screennum >= screens
 507       then error "invalid screen %d, max %d" screennum (screens-1);
 508
 509       let pos =
 510         let s = data in
 511         let rec findscreen n pos = if n = screennum then pos else
 512             let pos =
 513               let ndepths = r8 s (pos+39) in
 514               let rec skipdepths n pos = if n = ndepths then pos else
 515                   let pos =
 516                     let nvisiuals = r16 s (pos+2) in
 517                     pos + nvisiuals*24 + 8
 518                   in
 519                   skipdepths (n+1) pos
 520               in
 521               skipdepths n (pos+40)
 522             in
 523             findscreen (n+1) pos
 524         in
 525         findscreen 0 pos
 526       in
 527       let root = r32 data pos in
 528       let rootw = r16 data (pos+20)
 529       and rooth = r16 data (pos+22) in
 530       state.mink <- minkk;
 531       state.maxk <- maxkk;
 532       state.idbase <- idbase;
 533       vlog "vendor = %S, maj=%d min=%d" vendor maj min;
 534       vlog "screens = %d formats = %d" screens formats;
 535       vlog "minkk = %d maxkk = %d" minkk maxkk;
 536       vlog "idbase = %#x idmask = %#x" idbase idmask;
 537       vlog "root=%#x %dx%d" root rootw rooth;
 538
 539       let mask = 0
 540         + 0x00000001                    (* KeyPress *)
 541         (* + 0x00000002 *)              (* KeyRelease *)
 542         + 0x00000004                    (* ButtonPress *)
 543         + 0x00000008                    (* ButtonRelease *)
 544         + 0x00000010                    (* EnterWindow *)
 545         + 0x00000020                    (* LeaveWindow *)
 546         + 0x00000040                    (* PointerMotion *)
 547         (* + 0x00000080 *)              (* PointerMotionHint *)
 548         (* + 0x00000100 *)              (* Button1Motion *)
 549         (* + 0x00000200 *)              (* Button2Motion *)
 550         (* + 0x00000400 *)              (* Button3Motion *)
 551         (* + 0x00000800 *)              (* Button4Motion *)
 552         (* + 0x00001000 *)              (* Button5Motion *)
 553         + 0x00002000                    (* ButtonMotion *)
 554         (* + 0x00004000 *)              (* KeymapState *)
 555         + 0x00008000                    (* Exposure *)
 556         + 0x00010000                    (* VisibilityChange *)
 557         + 0x00020000                    (* StructureNotify *)
 558         (* + 0x00040000 *)              (* ResizeRedirect *)
 559         (* + 0x00080000 *)              (* SubstructureNotify *)
 560         (* + 0x00100000 *)              (* SubstructureRedirect *)
 561         (* + 0x00200000 *)              (* FocusChange *)
 562         (* + 0x00400000 *)              (* PropertyChange *)
 563         (* + 0x00800000 *)              (* ColormapChange *)
 564         (* + 0x01000000 *)              (* OwnerGrabButton *)
 565       in
 566       let wid = state.idbase in
 567       state.w <- w;
 568       state.h <- h;
 569       let s = createwindowreq wid root 0 0 w h 0 mask in
 570       sendstr s sock;
 571
 572       let s = mapreq wid in
 573       sendstr s sock;
 574
 575       let s = getkeymapreq state.mink (state.maxk-state.mink) in
 576       sendwithrep sock s (updkmap sock);
 577
 578       sendintern sock "WM_PROTOCOLS" false (fun resp ->
 579         state.protoatom <- r32 resp 8;
 580         sendintern sock "WM_DELETE_WINDOW" false (fun resp ->
 581           state.deleatom <- r32 resp 8;
 582           let s = s32 state.deleatom in
 583           let s = changepropreq wid state.protoatom 4 32 s in
 584           sendstr s sock;
 585         );
 586       );
 587
 588       sendintern sock "WM_CLASS" false (fun resp ->
 589         let atom = r32 resp 8 in
 590         let llpp = "llpp\000llpp\000" in
 591         let s = changepropreq wid atom 31 8 llpp in
 592         sendstr s sock;
 593       );
 594
 595       let s = openfontreq (wid+1) "cursor" in
 596       sendstr s sock;
 597
 598       Array.iteri (fun i glyphindex ->
 599         let s = createglyphcursorreq (wid+1) (wid+2+i) glyphindex in
 600         sendstr s sock;
 601       ) [|34;48;50;58;128;152|];
 602
 603       sendintern sock "UTF8_STRING" false (fun resp ->
 604         state.stringatom <- r32 resp 8;
 605       );
 606
 607       sendintern sock "_NET_WM_STATE" true (fun resp ->
 608         let nwmsatom = r32 resp 8 in
 609         sendintern sock "_NET_WM_STATE_FULLSCREEN" true (fun resp ->
 610           let fsatom = r32 resp 8 in
 611
 612           state.fullscreen <-
 613             (fun wid ->
 614               let data = String.make 20 '\000' in
 615               state.fs <- not state.fs;
 616               w32 data 0 (if state.fs then 1 else 0);
 617               w32 data 4 fsatom;
 618
 619               let cm = clientmessage 32 0 wid nwmsatom data in
 620               let s = sendeventreq 0 root 0x180000 cm in
 621               sendstr s sock;
 622               ()
 623           );
 624         );
 625       );
 626       glx wid
 627
 628   | c ->
 629       error "unknown conection setup response %d" (Char.code c)
 630 ;;
 631
 632 let getauth haddr dnum =
 633   let haddr =
 634     if haddr = "localhost"
 635     then
 636       try Unix.gethostname ()
 637       with exn ->
 638         dolog "failed to resolve `%S': %s" haddr (Printexc.to_string exn);
 639         haddr
 640     else haddr
 641   in
 642   let readauth ic =
 643     let input_string ic len =
 644       let s = String.create len in
 645       really_input ic s 0 len;
 646       s;
 647     in
 648     let r16 s =
 649       let rb pos = Char.code (String.get s pos) in
 650       (rb 1) lor ((rb 0) lsl 8)
 651     in
 652     let rec find () =
 653       let rs () =
 654         let s = input_string ic 2 in
 655         let n = r16 s in
 656         input_string ic n
 657       in
 658       let family = input_string ic 2 in
 659       let addr = rs () in
 660       let nums = rs () in
 661       let num = int_of_string nums in
 662       let name = rs () in
 663       let data = rs () in
 664
 665       vlog "family %S addr %S(%S) num %d(%d) name %S data %S"
 666         family addr haddr num dnum name data;
 667       if addr = haddr && num = dnum
 668       then name, data
 669       else find ()
 670     in
 671     let name, data =
 672       try find () with _ -> "", ""
 673     in
 674     close_in ic;
 675     name, data;
 676   in
 677   let path =
 678     try Sys.getenv "XAUTHORITY"
 679     with Not_found -> Filename.concat (Sys.getenv "HOME") ".Xauthority"
 680   in
 681   let opt =
 682     try Some (open_in_bin path)
 683     with exn ->
 684       dolog "failed to open X authority file `%S' : %s"
 685         path
 686         (Printexc.to_string exn);
 687       None
 688   in
 689   match opt with
 690   | None -> "", ""
 691   | Some ic -> readauth ic
 692 ;;
 693
 694 let init t w h =
 695   let d =
 696     try Sys.getenv "DISPLAY"
 697     with exn ->
 698       error "Could not get DISPLAY evironment variable: %s"
 699         (Printexc.to_string exn)
 700   in
 701   let colonpos = String.index d ':' in
 702   let host = String.sub d 0 colonpos in
 703   let dispnum, screennum =
 704     try
 705       let dotpos = String.index_from d (colonpos + 1) '.' in
 706       let disp = String.sub d (colonpos + 1) (dotpos - colonpos - 1) in
 707       let screen = String.sub d (dotpos + 1) (String.length d - dotpos - 1) in
 708       int_of_string disp, int_of_string screen
 709     with Not_found ->
 710       let disp = String.sub d (colonpos + 1) (String.length d - colonpos - 1) in
 711       int_of_string disp, 0
 712   in
 713   let aname, adata = getauth host dispnum in
 714   let fd =
 715     if String.length host = 0 || host = "unix"
 716     then
 717       let addr = Unix.ADDR_UNIX ("/tmp/.X11-unix/X" ^ string_of_int dispnum) in
 718       let fd = Unix.socket Unix.PF_UNIX Unix.SOCK_STREAM 0 in
 719       Unix.connect fd addr;
 720       fd
 721     else
 722       let h = Unix.gethostbyname host in
 723       let addr = h.Unix.h_addr_list.(0) in
 724       let port = 6000 + dispnum in
 725       let fd = Unix.socket Unix.PF_INET Unix.SOCK_STREAM 0 in
 726       Unix.connect fd (Unix.ADDR_INET (addr, port));
 727       fd
 728   in
 729   cloexec fd;
 730   let s = "luMMmmnndduu" in
 731   let s = padcat s aname in
 732   let s = padcat s adata in
 733   w16 s 2 11;
 734   w16 s 4 0;
 735   w16 s 6 (String.length aname);
 736   w16 s 8 (String.length adata);
 737   sendstr s fd;
 738   state.sock <- fd;
 739   setup fd screennum w h;
 740   state.t <- t;
 741   fd;
 742 ;;
 743
 744 let settitle s =
 745   let s = changepropreq state.idbase 39 state.stringatom 8 s in
 746   sendstr s state.sock;
 747 ;;
 748
 749 let setcursor cursor =
 750   let n =
 751     match cursor with
 752     | CURSOR_INHERIT -> -1
 753     | CURSOR_INFO -> 3
 754     | CURSOR_CYCLE -> 2
 755     | CURSOR_CROSSHAIR -> 0
 756     | CURSOR_TEXT -> 5
 757   in
 758   let s = s32 (if n = -1 then 0 else state.idbase+2+n) in
 759   let s = changewindowattributesreq state.idbase (*cursor*)0x4000 s in
 760   sendstr s state.sock;
 761 ;;
 762
 763 let fullscreen () =
 764   state.fullscreen state.idbase;
 765 ;;
 766
 767 let withalt mask = mask land 8 != 0;;
 768 let withctrl mask = mask land 4 != 0;;
 769 let withshift mask = mask land 1 != 0;;