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 files
  57     in
  58         if !ErrorMsg.anyErrors then
  59             Env.empty
  60         else
  61             foldl (fn (fname, G) => check' G fname) Env.empty files
  62     end
  63
  64 fun check fname =
  65     let
  66         val _ = ErrorMsg.reset ()
  67         val _ = Env.preTycheck ()
  68
  69         val b = basis ()
  70     in
  71         if !ErrorMsg.anyErrors then
  72             raise ErrorMsg.Error
  73         else
  74             let
  75                 val _ = ErrorMsg.reset ()
  76                 val prog = Parse.parse fname
  77             in
  78                 if !ErrorMsg.anyErrors then
  79                     raise ErrorMsg.Error
  80                 else
  81                     let
  82                         val G' = Tycheck.checkFile b (Defaults.tInit ()) prog
  83                     in
  84                         if !ErrorMsg.anyErrors then
  85                             raise ErrorMsg.Error
  86                         else
  87                             (G', #3 prog)
  88                     end
  89             end
  90     end
  91
  92 fun reduce fname =
  93     let
  94         val (G, body) = check fname
  95     in
  96         if !ErrorMsg.anyErrors then
  97             NONE
  98         else
  99             case body of
 100                 SOME body =>
 101                 let
 102                     val body' = Reduce.reduceExp G body
 103                 in
 104                     (*printd (PD.hovBox (PD.PPS.Rel 0,
 105                                          [PD.string "Result:",
 106                                           PD.space 1,
 107                                           p_exp body']))*)
 108                     SOME body'
 109                 end
 110               | _ => NONE
 111     end
 112
 113 fun eval fname =
 114     case reduce fname of
 115         (SOME body') =>
 116         if !ErrorMsg.anyErrors then
 117             raise ErrorMsg.Error
 118         else
 119             Eval.exec (Defaults.eInit ()) body'
 120       | NONE => raise ErrorMsg.Error
 121
 122 val dispatcher =
 123     Config.dispatcher ^ ":" ^ Int.toString Config.dispatcherPort
 124
 125 fun request fname =
 126     let
 127         val uid = Posix.ProcEnv.getuid ()
 128         val user = Posix.SysDB.Passwd.name (Posix.SysDB.getpwuid uid)
 129
 130         val () = Acl.read Config.aclFile
 131         val () = Domain.setUser user
 132
 133         val _ = check fname
 134
 135         val uid = Posix.ProcEnv.getuid ()
 136         val user = Posix.SysDB.Passwd.name (Posix.SysDB.getpwuid uid)
 137
 138         val context = OpenSSL.context (Config.certDir ^ "/" ^ user ^ ".pem",
 139                                        Config.keyDir ^ "/" ^ user ^ "/key.pem",
 140                                        Config.trustStore)
 141
 142         val bio = OpenSSL.connect (context, dispatcher)
 143
 144         val inf = TextIO.openIn fname
 145
 146         fun loop lines =
 147             case TextIO.inputLine inf of
 148                 NONE => String.concat (List.rev lines)
 149               | SOME line => loop (line :: lines)
 150
 151         val code = loop []
 152     in
 153         TextIO.closeIn inf;
 154         Msg.send (bio, MsgConfig code);
 155         case Msg.recv bio of
 156             NONE => print "Server closed connection unexpectedly.\n"
 157           | SOME m =>
 158             case m of
 159                 MsgOk => print "Configuration succeeded.\n"
 160               | MsgError s => print ("Configuration failed: " ^ s ^ "\n")
 161               | _ => print "Unexpected server reply.\n";
 162         OpenSSL.close bio
 163     end
 164     handle ErrorMsg.Error => ()
 165
 166 fun service () =
 167     let
 168         val () = Acl.read Config.aclFile
 169
 170         val context = OpenSSL.context (Config.serverCert,
 171                                        Config.serverKey,
 172                                        Config.trustStore)
 173         val _ = Domain.set_context context
 174
 175         val sock = OpenSSL.listen (context, Config.dispatcherPort)
 176
 177         fun loop () =
 178             case OpenSSL.accept sock of
 179                 NONE => ()
 180               | SOME bio =>
 181                 let
 182                     val user = OpenSSL.peerCN bio
 183                     val () = print ("\nConnection from " ^ user ^ "\n")
 184                     val () = Domain.setUser user
 185
 186                     fun cmdLoop () =
 187                         case Msg.recv bio of
 188                             NONE => (OpenSSL.close bio
 189                                      handle OpenSSL.OpenSSL _ => ();
 190                                      loop ())
 191                           | SOME m =>
 192                             case m of
 193                                 MsgConfig code =>
 194                                 let
 195                                     val _ = print "Configuration:\n"
 196                                     val _ = print code
 197                                     val _ = print "\n"
 198
 199                                     val outname = OS.FileSys.tmpName ()
 200                                     val outf = TextIO.openOut outname
 201                                 in
 202                                     TextIO.output (outf, code);
 203                                     TextIO.closeOut outf;
 204                                     (eval outname;
 205                                      Msg.send (bio, MsgOk))
 206                                     handle ErrorMsg.Error =>
 207                                            (print "Compilation error\n";
 208                                             Msg.send (bio,
 209                                                       MsgError "Error during configuration evaluation"))
 210                                          | OpenSSL.OpenSSL s =>
 211                                            (print "OpenSSL error\n";
 212                                             Msg.send (bio,
 213                                                       MsgError
 214                                                           ("Error during configuration evaluation: "
 215                                                            ^ s)));
 216                                            OS.FileSys.remove outname;
 217                                            (ignore (OpenSSL.readChar bio);
 218                                             OpenSSL.close bio)
 219                                            handle OpenSSL.OpenSSL _ => ();
 220                                            loop ()
 221                                 end
 222                               | _ =>
 223                                 (Msg.send (bio, MsgError "Unexpected command")
 224                                  handle OpenSSL.OpenSSL _ => ();
 225                                  OpenSSL.close bio
 226                                  handle OpenSSL.OpenSSL _ => ();
 227                                  loop ())
 228                 in
 229                     cmdLoop ()
 230                 end
 231                     handle OpenSSL.OpenSSL s =>
 232                            (print ("OpenSSL error: " ^ s ^ "\n");
 233                             OpenSSL.close bio
 234                             handle OpenSSL.OpenSSL _ => ();
 235                             loop ())
 236                          | OS.SysErr (s, _) =>
 237                            (print ("System error: " ^ s ^ "\n");
 238                             OpenSSL.close bio
 239                             handle OpenSSL.OpenSSL _ => ();
 240                             loop ())
 241     in
 242         print "Listening for connections....\n";
 243         loop ();
 244         OpenSSL.shutdown sock
 245     end
 246
 247 fun slave () =
 248     let
 249         val host = Slave.hostname ()
 250
 251         val context = OpenSSL.context (Config.certDir ^ "/" ^ host ^ ".pem",
 252                                        Config.keyDir ^ "/" ^ host ^ "/key.pem",
 253                                        Config.trustStore)
 254
 255         val sock = OpenSSL.listen (context, Config.slavePort)
 256
 257         fun loop () =
 258             case OpenSSL.accept sock of
 259                 NONE => ()
 260               | SOME bio =>
 261                 let
 262                     val peer = OpenSSL.peerCN bio
 263                     val () = print ("\nConnection from " ^ peer ^ "\n")
 264                 in
 265                     if peer <> Config.dispatcherName then
 266                         (print "Not authorized!\n";
 267                          OpenSSL.close bio;
 268                          loop ())
 269                     else let
 270                             fun loop' files =
 271                                 case Msg.recv bio of
 272                                     NONE => print "Dispatcher closed connection unexpectedly\n"
 273                                   | SOME m =>
 274                                     case m of
 275                                         MsgFile file => loop' (file :: files)
 276                                       | MsgDoFiles => (Slave.handleChanges files;
 277                                                        Msg.send (bio, MsgOk))
 278                                       | _ => (print "Dispatcher sent unexpected command\n";
 279                                               Msg.send (bio, MsgError "Unexpected command"))
 280                         in
 281                             loop' [];
 282                             ignore (OpenSSL.readChar bio);
 283                             OpenSSL.close bio;
 284                             loop ()
 285                         end
 286                 end handle OpenSSL.OpenSSL s =>
 287                            (print ("OpenSSL error: "^ s ^ "\n");
 288                             OpenSSL.close bio
 289                                           handle OpenSSL.OpenSSL _ => ();
 290                             loop ())
 291                          | OS.SysErr (s, _) =>
 292                            (print ("System error: "^ s ^ "\n");
 293                             OpenSSL.close bio
 294                             handle OpenSSL.OpenSSL _ => ();
 295                             loop ())
 296     in
 297         loop ();
 298         OpenSSL.shutdown sock
 299     end
 300
 301 fun autodocBasis outdir =
 302     let
 303         val dir = Posix.FileSys.opendir Config.libRoot
 304
 305         fun loop files =
 306             case Posix.FileSys.readdir dir of
 307                 NONE => (Posix.FileSys.closedir dir;
 308                          files)
 309               | SOME fname =>
 310                 if String.isSuffix ".dtl" fname then
 311                     loop (OS.Path.joinDirFile {dir = Config.libRoot,
 312                                                file = fname}
 313                           :: files)
 314                 else
 315                     loop files
 316
 317         val files = loop []
 318     in
 319         Autodoc.autodoc {outdir = outdir, infiles = files}
 320     end
 321
 322 end