src/main.sml

   1 (* HCoop Domtool (http://hcoop.sourceforge.net/)
   2  * Copyright (c) 2006, Adam Chlipala
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  17  *)
  18
  19 (* Main interface *)
  20
  21 structure Main :> MAIN = struct
  22
  23 open Ast MsgTypes Print
  24
  25 structure SM = StringMap
  26
  27 fun init () = Acl.read Config.aclFile
  28
  29 fun check' G fname =
  30     let
  31         val prog = Parse.parse fname
  32     in
  33         if !ErrorMsg.anyErrors then
  34             G
  35         else
  36             Tycheck.checkFile G (Defaults.tInit ()) prog
  37     end
  38
  39 fun basis () =
  40     let
  41         val dir = Posix.FileSys.opendir Config.libRoot
  42
  43         fun loop files =
  44             case Posix.FileSys.readdir dir of
  45                 NONE => (Posix.FileSys.closedir dir;
  46                          files)
  47               | SOME fname =>
  48                 if String.isSuffix ".dtl" fname then
  49                     loop (OS.Path.joinDirFile {dir = Config.libRoot,
  50                                                file = fname}
  51                           :: files)
  52                 else
  53                     loop files
  54
  55         val files = loop []
  56         val (_, files) = Order.order NONE files
  57     in
  58         if !ErrorMsg.anyErrors then
  59             Env.empty
  60         else
  61             (Tycheck.allowExterns ();
  62              foldl (fn (fname, G) => check' G fname) Env.empty files
  63              before Tycheck.disallowExterns ())
  64     end
  65
  66 fun check fname =
  67     let
  68         val _ = ErrorMsg.reset ()
  69         val _ = Env.preTycheck ()
  70
  71         val b = basis ()
  72     in
  73         if !ErrorMsg.anyErrors then
  74             raise ErrorMsg.Error
  75         else
  76             let
  77                 val _ = Tycheck.disallowExterns ()
  78                 val _ = ErrorMsg.reset ()
  79                 val prog = Parse.parse fname
  80             in
  81                 if !ErrorMsg.anyErrors then
  82                     raise ErrorMsg.Error
  83                 else
  84                     let
  85                         val G' = Tycheck.checkFile b (Defaults.tInit ()) prog
  86                     in
  87                         if !ErrorMsg.anyErrors then
  88                             raise ErrorMsg.Error
  89                         else
  90                             (G', #3 prog)
  91                     end
  92             end
  93     end
  94
  95 val notTmp = CharVector.all (fn ch => Char.isAlphaNum ch orelse ch = #"." orelse ch = #"_" orelse ch = #"-")
  96
  97 fun checkDir dname =
  98     let
  99         val b = basis ()
 100
 101         val dir = Posix.FileSys.opendir dname
 102
 103         fun loop files =
 104             case Posix.FileSys.readdir dir of
 105                 NONE => (Posix.FileSys.closedir dir;
 106                          files)
 107               | SOME fname =>
 108                 if notTmp fname then
 109                     loop (OS.Path.joinDirFile {dir = dname,
 110                                                file = fname}
 111                           :: files)
 112                 else
 113                     loop files
 114
 115         val files = loop []
 116         val (_, files) = Order.order (SOME b) files
 117     in
 118         if !ErrorMsg.anyErrors then
 119             raise ErrorMsg.Error
 120         else
 121             (foldl (fn (fname, G) => check' G fname) b files;
 122              if !ErrorMsg.anyErrors then
 123                  raise ErrorMsg.Error
 124              else
 125                  ())
 126     end
 127
 128 fun reduce fname =
 129     let
 130         val (G, body) = check fname
 131     in
 132         if !ErrorMsg.anyErrors then
 133             NONE
 134         else
 135             case body of
 136                 SOME body =>
 137                 let
 138                     val body' = Reduce.reduceExp G body
 139                 in
 140                     (*printd (PD.hovBox (PD.PPS.Rel 0,
 141                                          [PD.string "Result:",
 142                                           PD.space 1,
 143                                           p_exp body']))*)
 144                     SOME body'
 145                 end
 146               | _ => NONE
 147     end
 148
 149 fun eval fname =
 150     case reduce fname of
 151         (SOME body') =>
 152         if !ErrorMsg.anyErrors then
 153             raise ErrorMsg.Error
 154         else
 155             Eval.exec (Defaults.eInit ()) body'
 156       | NONE => raise ErrorMsg.Error
 157
 158 fun eval' fname =
 159     case reduce fname of
 160         (SOME body') =>
 161         if !ErrorMsg.anyErrors then
 162             raise ErrorMsg.Error
 163         else
 164             ignore (Eval.exec' (Defaults.eInit ()) body')
 165       | NONE => raise ErrorMsg.Error
 166
 167 val dispatcher =
 168     Config.dispatcher ^ ":" ^ Int.toString Config.dispatcherPort
 169
 170 fun requestContext f =
 171     let
 172         val uid = Posix.ProcEnv.getuid ()
 173         val user = Posix.SysDB.Passwd.name (Posix.SysDB.getpwuid uid)
 174
 175         val () = Acl.read Config.aclFile
 176         val () = Domain.setUser user
 177
 178         val () = f ()
 179
 180         val context = OpenSSL.context (Config.certDir ^ "/" ^ user ^ ".pem",
 181                                        Config.keyDir ^ "/" ^ user ^ "/key.pem",
 182                                        Config.trustStore)
 183     in
 184         (user, context)
 185     end
 186
 187 fun requestBio f =
 188     let
 189         val (user, context) = requestContext f
 190     in
 191         (user, OpenSSL.connect (context, dispatcher))
 192     end
 193
 194 fun request fname =
 195     let
 196         val (user, bio) = requestBio (fn () => ignore (check fname))
 197
 198         val inf = TextIO.openIn fname
 199
 200         fun loop lines =
 201             case TextIO.inputLine inf of
 202                 NONE => String.concat (List.rev lines)
 203               | SOME line => loop (line :: lines)
 204
 205         val code = loop []
 206     in
 207         TextIO.closeIn inf;
 208         Msg.send (bio, MsgConfig code);
 209         case Msg.recv bio of
 210             NONE => print "Server closed connection unexpectedly.\n"
 211           | SOME m =>
 212             case m of
 213                 MsgOk => print "Configuration succeeded.\n"
 214               | MsgError s => print ("Configuration failed: " ^ s ^ "\n")
 215               | _ => print "Unexpected server reply.\n";
 216         OpenSSL.close bio
 217     end
 218     handle ErrorMsg.Error => ()
 219
 220 fun requestDir dname =
 221     let
 222         val _ = ErrorMsg.reset ()
 223
 224         val (user, bio) = requestBio (fn () => checkDir dname)
 225
 226         val b = basis ()
 227
 228         val dir = Posix.FileSys.opendir dname
 229
 230         fun loop files =
 231             case Posix.FileSys.readdir dir of
 232                 NONE => (Posix.FileSys.closedir dir;
 233                          files)
 234               | SOME fname =>
 235                 if notTmp fname then
 236                     loop (OS.Path.joinDirFile {dir = dname,
 237                                                file = fname}
 238                           :: files)
 239                 else
 240                     loop files
 241
 242         val files = loop []
 243         val (_, files) = Order.order (SOME b) files
 244
 245         val _ = if !ErrorMsg.anyErrors then
 246                     raise ErrorMsg.Error
 247                 else
 248                     ()
 249
 250         val codes = map (fn fname =>
 251                             let
 252                                 val inf = TextIO.openIn fname
 253
 254                                 fun loop lines =
 255                                     case TextIO.inputLine inf of
 256                                         NONE => String.concat (rev lines)
 257                                       | SOME line => loop (line :: lines)
 258                             in
 259                                 loop []
 260                                 before TextIO.closeIn inf
 261                             end) files
 262     in
 263         if !ErrorMsg.anyErrors then
 264             ()
 265         else
 266             (Msg.send (bio, MsgMultiConfig codes);
 267              case Msg.recv bio of
 268                  NONE => print "Server closed connection unexpectedly.\n"
 269                | SOME m =>
 270                  case m of
 271                      MsgOk => print "Configuration succeeded.\n"
 272                    | MsgError s => print ("Configuration failed: " ^ s ^ "\n")
 273                    | _ => print "Unexpected server reply.\n";
 274              OpenSSL.close bio)
 275     end
 276     handle ErrorMsg.Error => ()
 277
 278 fun requestGrant acl =
 279     let
 280         val (user, bio) = requestBio (fn () => ())
 281     in
 282         Msg.send (bio, MsgGrant acl);
 283         case Msg.recv bio of
 284             NONE => print "Server closed connection unexpectedly.\n"
 285           | SOME m =>
 286             case m of
 287                 MsgOk => print "Grant succeeded.\n"
 288               | MsgError s => print ("Grant failed: " ^ s ^ "\n")
 289               | _ => print "Unexpected server reply.\n";
 290         OpenSSL.close bio
 291     end
 292
 293 fun requestRevoke acl =
 294     let
 295         val (user, bio) = requestBio (fn () => ())
 296     in
 297         Msg.send (bio, MsgRevoke acl);
 298         case Msg.recv bio of
 299             NONE => print "Server closed connection unexpectedly.\n"
 300           | SOME m =>
 301             case m of
 302                 MsgOk => print "Revoke succeeded.\n"
 303               | MsgError s => print ("Revoke failed: " ^ s ^ "\n")
 304               | _ => print "Unexpected server reply.\n";
 305         OpenSSL.close bio
 306     end
 307
 308 fun requestListPerms user =
 309     let
 310         val (_, bio) = requestBio (fn () => ())
 311     in
 312         Msg.send (bio, MsgListPerms user);
 313         (case Msg.recv bio of
 314              NONE => (print "Server closed connection unexpectedly.\n";
 315                       NONE)
 316            | SOME m =>
 317              case m of
 318                  MsgPerms perms => SOME perms
 319                | MsgError s => (print ("Listing failed: " ^ s ^ "\n");
 320                                 NONE)
 321                | _ => (print "Unexpected server reply.\n";
 322                        NONE))
 323         before OpenSSL.close bio
 324     end
 325
 326 fun requestWhoHas perm =
 327     let
 328         val (_, bio) = requestBio (fn () => ())
 329     in
 330         Msg.send (bio, MsgWhoHas perm);
 331         (case Msg.recv bio of
 332              NONE => (print "Server closed connection unexpectedly.\n";
 333                       NONE)
 334            | SOME m =>
 335              case m of
 336                  MsgWhoHasResponse users => SOME users
 337                | MsgError s => (print ("whohas failed: " ^ s ^ "\n");
 338                                 NONE)
 339                | _ => (print "Unexpected server reply.\n";
 340                        NONE))
 341         before OpenSSL.close bio
 342     end
 343
 344 fun requestRegen () =
 345     let
 346         val (_, bio) = requestBio (fn () => ())
 347     in
 348         Msg.send (bio, MsgRegenerate);
 349         case Msg.recv bio of
 350             NONE => print "Server closed connection unexpectedly.\n"
 351           | SOME m =>
 352             case m of
 353                 MsgOk => print "Regeneration succeeded.\n"
 354               | MsgError s => print ("Regeneration failed: " ^ s ^ "\n")
 355               | _ => print "Unexpected server reply.\n";
 356         OpenSSL.close bio
 357     end
 358
 359 fun requestRmdom dom =
 360     let
 361         val (_, bio) = requestBio (fn () => ())
 362     in
 363         Msg.send (bio, MsgRmdom dom);
 364         case Msg.recv bio of
 365             NONE => print "Server closed connection unexpectedly.\n"
 366           | SOME m =>
 367             case m of
 368                 MsgOk => print "Removal succeeded.\n"
 369               | MsgError s => print ("Removal failed: " ^ s ^ "\n")
 370               | _ => print "Unexpected server reply.\n";
 371         OpenSSL.close bio
 372     end
 373
 374 fun requestRmuser user =
 375     let
 376         val (_, bio) = requestBio (fn () => ())
 377     in
 378         Msg.send (bio, MsgRmuser user);
 379         case Msg.recv bio of
 380             NONE => print "Server closed connection unexpectedly.\n"
 381           | SOME m =>
 382             case m of
 383                 MsgOk => print "Removal succeeded.\n"
 384               | MsgError s => print ("Removal failed: " ^ s ^ "\n")
 385               | _ => print "Unexpected server reply.\n";
 386         OpenSSL.close bio
 387     end
 388
 389 fun regenerate context =
 390     let
 391         val b = basis ()
 392         val () = Tycheck.disallowExterns ()
 393
 394         val () = Domain.resetGlobal ()
 395
 396         fun contactNode (node, ip) =
 397             if node = Config.defaultNode then
 398                 Domain.resetLocal ()
 399             else let
 400                     val bio = OpenSSL.connect (context,
 401                                                ip
 402                                                ^ ":"
 403                                                ^ Int.toString Config.slavePort)
 404                 in
 405                     Msg.send (bio, MsgRegenerate);
 406                     case Msg.recv bio of
 407                         NONE => print "Slave closed connection unexpectedly\n"
 408                       | SOME m =>
 409                         case m of
 410                             MsgOk => print ("Slave " ^ node ^ " pre-regeneration finished\n")
 411                           | MsgError s => print ("Slave " ^ node
 412                                                  ^ " returned error: " ^
 413                                                  s ^ "\n")
 414                           | _ => print ("Slave " ^ node
 415                                         ^ " returned unexpected command\n");
 416                     OpenSSL.close bio
 417                 end
 418
 419         fun doUser user =
 420             let
 421                 val _ = Domain.setUser user
 422                 val _ = ErrorMsg.reset ()
 423
 424                 val dname = Config.domtoolDir user
 425
 426                 val dir = Posix.FileSys.opendir dname
 427
 428                 fun loop files =
 429                     case Posix.FileSys.readdir dir of
 430                         NONE => (Posix.FileSys.closedir dir;
 431                                  files)
 432                       | SOME fname =>
 433                         if notTmp fname then
 434                             loop (OS.Path.joinDirFile {dir = dname,
 435                                                        file = fname}
 436                                   :: files)
 437                         else
 438                             loop files
 439
 440                 val files = loop []
 441                 val (_, files) = Order.order (SOME b) files
 442             in
 443                 if !ErrorMsg.anyErrors then
 444                     print ("User " ^ user ^ "'s configuration has errors!\n")
 445                 else
 446                     app eval' files
 447             end
 448                 handle IO.Io _ => ()
 449                      | OS.SysErr (s, _) => print ("System error processing user " ^ user ^ ": " ^ s ^ "\n")
 450     in
 451         app contactNode Config.nodeIps;
 452         Env.pre ();
 453         app doUser (Acl.users ());
 454         Env.post ()
 455     end
 456
 457 fun rmuser user =
 458     let
 459         val doms = Acl.class {user = user, class = "domain"}
 460         val doms = List.filter (fn dom =>
 461                                    case Acl.whoHas {class = "domain", value = dom} of
 462                                        [_] => true
 463                                      | _ => false) (StringSet.listItems doms)
 464     in
 465         Acl.rmuser user;
 466         Domain.rmdom doms
 467     end
 468
 469 fun service () =
 470     let
 471         val () = Acl.read Config.aclFile
 472
 473         val context = OpenSSL.context (Config.serverCert,
 474                                        Config.serverKey,
 475                                        Config.trustStore)
 476         val _ = Domain.set_context context
 477
 478         val sock = OpenSSL.listen (context, Config.dispatcherPort)
 479
 480         fun loop () =
 481             case OpenSSL.accept sock of
 482                 NONE => ()
 483               | SOME bio =>
 484                 let
 485                     val user = OpenSSL.peerCN bio
 486                     val () = print ("\nConnection from " ^ user ^ "\n")
 487                     val () = Domain.setUser user
 488
 489                     fun doConfig codes =
 490                         let
 491                             val _ = print "Configuration:\n"
 492                             val _ = app (fn s => (print s; print "\n")) codes
 493                             val _ = print "\n"
 494
 495                             val outname = OS.FileSys.tmpName ()
 496
 497                             fun doOne code =
 498                                 let
 499                                     val outf = TextIO.openOut outname
 500                                 in
 501                                     TextIO.output (outf, code);
 502                                     TextIO.closeOut outf;
 503                                     eval' outname
 504                                 end
 505                         in
 506                             (Env.pre ();
 507                              app doOne codes;
 508                              Env.post ();
 509                              Msg.send (bio, MsgOk))
 510                             handle ErrorMsg.Error =>
 511                                    (print "Compilation error\n";
 512                                     Msg.send (bio,
 513                                               MsgError "Error during configuration evaluation"))
 514                                  | OpenSSL.OpenSSL s =>
 515                                    (print "OpenSSL error\n";
 516                                     Msg.send (bio,
 517                                               MsgError
 518                                                   ("Error during configuration evaluation: "
 519                                                    ^ s)));
 520                            OS.FileSys.remove outname;
 521                            (ignore (OpenSSL.readChar bio);
 522                             OpenSSL.close bio)
 523                            handle OpenSSL.OpenSSL _ => ();
 524                            loop ()
 525                         end
 526
 527                     fun cmdLoop () =
 528                         case Msg.recv bio of
 529                             NONE => (OpenSSL.close bio
 530                                      handle OpenSSL.OpenSSL _ => ();
 531                                      loop ())
 532                           | SOME m =>
 533                             case m of
 534                                 MsgConfig code => doConfig [code]
 535                               | MsgMultiConfig codes => doConfig codes
 536
 537                               | MsgGrant acl =>
 538                                 if Acl.query {user = user, class = "priv", value = "all"} then
 539                                     ((Acl.grant acl;
 540                                       Acl.write Config.aclFile;
 541                                       Msg.send (bio, MsgOk);
 542                                       print ("Granted permission " ^ #value acl ^ " to " ^ #user acl ^ " in " ^ #class acl ^ ".\n"))
 543                                      handle OpenSSL.OpenSSL s =>
 544                                             (print "OpenSSL error\n";
 545                                              Msg.send (bio,
 546                                                        MsgError
 547                                                            ("Error during granting: "
 548                                                             ^ s)));
 549                                     (ignore (OpenSSL.readChar bio);
 550                                      OpenSSL.close bio)
 551                                     handle OpenSSL.OpenSSL _ => ();
 552                                     loop ())
 553                                 else
 554                                     ((Msg.send (bio, MsgError "Not authorized to grant privileges");
 555                                       print "Unauthorized user asked to grant a permission!\n";
 556                                       ignore (OpenSSL.readChar bio);
 557                                       OpenSSL.close bio)
 558                                      handle OpenSSL.OpenSSL _ => ();
 559                                      loop ())
 560
 561                               | MsgRevoke acl =>
 562                                 if Acl.query {user = user, class = "priv", value = "all"} then
 563                                     ((Acl.revoke acl;
 564                                       Acl.write Config.aclFile;
 565                                       Msg.send (bio, MsgOk);
 566                                       print ("Revoked permission " ^ #value acl ^ " from " ^ #user acl ^ " in " ^ #class acl ^ ".\n"))
 567                                      handle OpenSSL.OpenSSL s =>
 568                                             (print "OpenSSL error\n";
 569                                              Msg.send (bio,
 570                                                        MsgError
 571                                                            ("Error during revocation: "
 572                                                             ^ s)));
 573                                     (ignore (OpenSSL.readChar bio);
 574                                      OpenSSL.close bio)
 575                                     handle OpenSSL.OpenSSL _ => ();
 576                                     loop ())
 577                                 else
 578                                     ((Msg.send (bio, MsgError "Not authorized to revoke privileges");
 579                                       print "Unauthorized user asked to revoke a permission!\n";
 580                                       ignore (OpenSSL.readChar bio);
 581                                       OpenSSL.close bio)
 582                                      handle OpenSSL.OpenSSL _ => ();
 583                                      loop ())
 584
 585                               | MsgListPerms user =>
 586                                 ((Msg.send (bio, MsgPerms (Acl.queryAll user));
 587                                   print ("Sent permission list for user " ^ user ^ ".\n"))
 588                                  handle OpenSSL.OpenSSL s =>
 589                                         (print "OpenSSL error\n";
 590                                          Msg.send (bio,
 591                                                    MsgError
 592                                                        ("Error during permission listing: "
 593                                                         ^ s)));
 594                                 (ignore (OpenSSL.readChar bio);
 595                                  OpenSSL.close bio)
 596                                 handle OpenSSL.OpenSSL _ => ();
 597                                 loop ())
 598
 599                               | MsgWhoHas perm =>
 600                                 ((Msg.send (bio, MsgWhoHasResponse (Acl.whoHas perm));
 601                                   print ("Sent whohas response for " ^ #class perm ^ " / " ^ #value perm ^ ".\n"))
 602                                  handle OpenSSL.OpenSSL s =>
 603                                         (print "OpenSSL error\n";
 604                                          Msg.send (bio,
 605                                                    MsgError
 606                                                        ("Error during whohas: "
 607                                                         ^ s)));
 608                                 (ignore (OpenSSL.readChar bio);
 609                                  OpenSSL.close bio)
 610                                 handle OpenSSL.OpenSSL _ => ();
 611                                 loop ())
 612
 613                               | MsgRmdom doms =>
 614                                 if Acl.query {user = user, class = "priv", value = "all"}
 615                                    orelse List.all (fn dom => Acl.query {user = user, class = "domain", value = dom}) doms then
 616                                     ((Domain.rmdom doms;
 617                                       app (fn dom =>
 618                                               Acl.revokeFromAll {class = "domain", value = dom}) doms;
 619                                       Acl.write Config.aclFile;
 620                                       Msg.send (bio, MsgOk);
 621                                       print ("Removed domains" ^ foldl (fn (d, s) => s ^ " " ^ d) "" doms ^ ".\n"))
 622                                      handle OpenSSL.OpenSSL s =>
 623                                             (print "OpenSSL error\n";
 624                                              Msg.send (bio,
 625                                                        MsgError
 626                                                            ("Error during revocation: "
 627                                                             ^ s)));
 628                                     (ignore (OpenSSL.readChar bio);
 629                                      OpenSSL.close bio)
 630                                     handle OpenSSL.OpenSSL _ => ();
 631                                     loop ())
 632                                 else
 633                                     ((Msg.send (bio, MsgError "Not authorized to remove that domain");
 634                                       print "Unauthorized user asked to remove a domain!\n";
 635                                       ignore (OpenSSL.readChar bio);
 636                                       OpenSSL.close bio)
 637                                      handle OpenSSL.OpenSSL _ => ();
 638                                      loop ())
 639
 640                               | MsgRegenerate =>
 641                                 if Acl.query {user = user, class = "priv", value = "regen"}
 642                                    orelse Acl.query {user = user, class = "priv", value = "all"} then
 643                                     ((regenerate context;
 644                                       Msg.send (bio, MsgOk);
 645                                       print "Regenerated all configuration.\n")
 646                                      handle OpenSSL.OpenSSL s =>
 647                                             (print "OpenSSL error\n";
 648                                              Msg.send (bio,
 649                                                        MsgError
 650                                                            ("Error during regeneration: "
 651                                                             ^ s)));
 652                                     (ignore (OpenSSL.readChar bio);
 653                                      OpenSSL.close bio)
 654                                     handle OpenSSL.OpenSSL _ => ();
 655                                     loop ())
 656                                 else
 657                                     ((Msg.send (bio, MsgError "Not authorized to regeneration");
 658                                       print "Unauthorized user asked to regenerate!\n";
 659                                       ignore (OpenSSL.readChar bio);
 660                                       OpenSSL.close bio)
 661                                      handle OpenSSL.OpenSSL _ => ();
 662                                      loop ())
 663
 664                               | MsgRmuser user' =>
 665                                 if Acl.query {user = user, class = "priv", value = "all"} then
 666                                     ((rmuser user';
 667                                       Acl.write Config.aclFile;
 668                                       Msg.send (bio, MsgOk);
 669                                       print ("Removed user " ^ user' ^ ".\n"))
 670                                      handle OpenSSL.OpenSSL s =>
 671                                             (print "OpenSSL error\n";
 672                                              Msg.send (bio,
 673                                                        MsgError
 674                                                            ("Error during revocation: "
 675                                                             ^ s)));
 676                                     (ignore (OpenSSL.readChar bio);
 677                                      OpenSSL.close bio)
 678                                     handle OpenSSL.OpenSSL _ => ();
 679                                     loop ())
 680                                 else
 681                                     ((Msg.send (bio, MsgError "Not authorized to remove users");
 682                                       print "Unauthorized user asked to remove a user!\n";
 683                                       ignore (OpenSSL.readChar bio);
 684                                       OpenSSL.close bio)
 685                                      handle OpenSSL.OpenSSL _ => ();
 686                                      loop ())
 687
 688                               | _ =>
 689                                 (Msg.send (bio, MsgError "Unexpected command")
 690                                  handle OpenSSL.OpenSSL _ => ();
 691                                  OpenSSL.close bio
 692                                  handle OpenSSL.OpenSSL _ => ();
 693                                  loop ())
 694                 in
 695                     cmdLoop ()
 696                 end
 697                     handle OpenSSL.OpenSSL s =>
 698                            (print ("OpenSSL error: " ^ s ^ "\n");
 699                             OpenSSL.close bio
 700                             handle OpenSSL.OpenSSL _ => ();
 701                             loop ())
 702                          | OS.SysErr (s, _) =>
 703                            (print ("System error: " ^ s ^ "\n");
 704                             OpenSSL.close bio
 705                             handle OpenSSL.OpenSSL _ => ();
 706                             loop ())
 707     in
 708         print "Listening for connections....\n";
 709         loop ();
 710         OpenSSL.shutdown sock
 711     end
 712
 713 fun slave () =
 714     let
 715         val host = Slave.hostname ()
 716
 717         val context = OpenSSL.context (Config.certDir ^ "/" ^ host ^ ".pem",
 718                                        Config.keyDir ^ "/" ^ host ^ "/key.pem",
 719                                        Config.trustStore)
 720
 721         val sock = OpenSSL.listen (context, Config.slavePort)
 722
 723         fun loop () =
 724             case OpenSSL.accept sock of
 725                 NONE => ()
 726               | SOME bio =>
 727                 let
 728                     val peer = OpenSSL.peerCN bio
 729                     val () = print ("\nConnection from " ^ peer ^ "\n")
 730                 in
 731                     if peer <> Config.dispatcherName then
 732                         (print "Not authorized!\n";
 733                          OpenSSL.close bio;
 734                          loop ())
 735                     else let
 736                             fun loop' files =
 737                                 case Msg.recv bio of
 738                                     NONE => print "Dispatcher closed connection unexpectedly\n"
 739                                   | SOME m =>
 740                                     case m of
 741                                         MsgFile file => loop' (file :: files)
 742                                       | MsgDoFiles => (Slave.handleChanges files;
 743                                                        Msg.send (bio, MsgOk))
 744                                       | MsgRegenerate => (Domain.resetLocal ();
 745                                                           Msg.send (bio, MsgOk))
 746                                       | _ => (print "Dispatcher sent unexpected command\n";
 747                                               Msg.send (bio, MsgError "Unexpected command"))
 748                         in
 749                             loop' [];
 750                             ignore (OpenSSL.readChar bio);
 751                             OpenSSL.close bio;
 752                             loop ()
 753                         end
 754                 end handle OpenSSL.OpenSSL s =>
 755                            (print ("OpenSSL error: "^ s ^ "\n");
 756                             OpenSSL.close bio
 757                                           handle OpenSSL.OpenSSL _ => ();
 758                             loop ())
 759                          | OS.SysErr (s, _) =>
 760                            (print ("System error: "^ s ^ "\n");
 761                             OpenSSL.close bio
 762                             handle OpenSSL.OpenSSL _ => ();
 763                             loop ())
 764     in
 765         loop ();
 766         OpenSSL.shutdown sock
 767     end
 768
 769 fun autodocBasis outdir =
 770     let
 771         val dir = Posix.FileSys.opendir Config.libRoot
 772
 773         fun loop files =
 774             case Posix.FileSys.readdir dir of
 775                 NONE => (Posix.FileSys.closedir dir;
 776                          files)
 777               | SOME fname =>
 778                 if String.isSuffix ".dtl" fname then
 779                     loop (OS.Path.joinDirFile {dir = Config.libRoot,
 780                                                file = fname}
 781                           :: files)
 782                 else
 783                     loop files
 784
 785         val files = loop []
 786     in
 787         Autodoc.autodoc {outdir = outdir, infiles = files}
 788     end
 789
 790 end