src/main.sml

(* HCoop Domtool (http://hcoop.sourceforge.net/)
 * Copyright (c) 2006, Adam Chlipala
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *)

(* Main interface *)

structure Main :> MAIN = struct

open Ast MsgTypes Print

structure SM = StringMap

fun init () = Acl.read Config.aclFile

fun check' G fname =
    let
	val prog = Parse.parse fname
    in
	if !ErrorMsg.anyErrors then
	    G
	else
	    Tycheck.checkFile G (Defaults.tInit ()) prog
    end

fun basis () =
    let
	val dir = Posix.FileSys.opendir Config.libRoot

	fun loop files =
	    case Posix.FileSys.readdir dir of
		NONE => (Posix.FileSys.closedir dir;
			 files)
	      | SOME fname =>
		if String.isSuffix ".dtl" fname then
		    loop (OS.Path.joinDirFile {dir = Config.libRoot,
					       file = fname}
			  :: files)
		else
		    loop files

	val files = loop []
	val (_, files) = Order.order files
    in
	if !ErrorMsg.anyErrors then
	    Env.empty
	else
	    (Tycheck.allowExterns ();
	     foldl (fn (fname, G) => check' G fname) Env.empty files
	     before Tycheck.disallowExterns ())
    end

fun check fname =
    let
	val _ = ErrorMsg.reset ()
	val _ = Env.preTycheck ()

	val b = basis ()
    in
	if !ErrorMsg.anyErrors then
	    raise ErrorMsg.Error
	else
	    let
		val _ = Tycheck.disallowExterns ()
		val _ = ErrorMsg.reset ()
		val prog = Parse.parse fname
	    in
		if !ErrorMsg.anyErrors then
		    raise ErrorMsg.Error
		else
		    let
			val G' = Tycheck.checkFile b (Defaults.tInit ()) prog
		    in
			if !ErrorMsg.anyErrors then
			    raise ErrorMsg.Error
			else
			    (G', #3 prog)
		    end
	    end
    end

fun reduce fname =
    let
	val (G, body) = check fname
    in
	if !ErrorMsg.anyErrors then
	    NONE
	else
	    case body of
		SOME body =>
		let
		    val body' = Reduce.reduceExp G body
		in
		    (*printd (PD.hovBox (PD.PPS.Rel 0,
					 [PD.string "Result:",
					  PD.space 1,
					  p_exp body']))*)
		    SOME body'
		end
	      | _ => NONE
    end

fun eval fname =
    case reduce fname of
	(SOME body') =>
	if !ErrorMsg.anyErrors then
	    raise ErrorMsg.Error
	else
	    Eval.exec (Defaults.eInit ()) body'
      | NONE => raise ErrorMsg.Error

val dispatcher =
    Config.dispatcher ^ ":" ^ Int.toString Config.dispatcherPort

fun requestContext f =
    let
	val uid = Posix.ProcEnv.getuid ()
	val user = Posix.SysDB.Passwd.name (Posix.SysDB.getpwuid uid)

	val () = Acl.read Config.aclFile
	val () = Domain.setUser user

	val () = f ()

	val context = OpenSSL.context (Config.certDir ^ "/" ^ user ^ ".pem",
				       Config.keyDir ^ "/" ^ user ^ "/key.pem",
				       Config.trustStore)
    in
	(user, context)
    end

fun requestBio f =
    let
	val (user, context) = requestContext f
    in
	(user, OpenSSL.connect (context, dispatcher))
    end

fun request fname =
    let
	val (user, bio) = requestBio (fn () => ignore (check fname))

	val inf = TextIO.openIn fname

	fun loop lines =
	    case TextIO.inputLine inf of
		NONE => String.concat (List.rev lines)
	      | SOME line => loop (line :: lines)

	val code = loop []
    in
	TextIO.closeIn inf;
	Msg.send (bio, MsgConfig code);
	case Msg.recv bio of
	    NONE => print "Server closed connection unexpectedly.\n"
	  | SOME m =>
	    case m of
		MsgOk => print "Configuration succeeded.\n"
	      | MsgError s => print ("Configuration failed: " ^ s ^ "\n")
	      | _ => print "Unexpected server reply.\n";
	OpenSSL.close bio
    end
    handle ErrorMsg.Error => ()

fun requestGrant acl =
    let
	val (user, bio) = requestBio (fn () => ())
    in
	Msg.send (bio, MsgGrant acl);
	case Msg.recv bio of
	    NONE => print "Server closed connection unexpectedly.\n"
	  | SOME m =>
	    case m of
		MsgOk => print "Grant succeeded.\n"
	      | MsgError s => print ("Grant failed: " ^ s ^ "\n")
	      | _ => print "Unexpected server reply.\n";
	OpenSSL.close bio
    end

fun requestRevoke acl =
    let
	val (user, bio) = requestBio (fn () => ())
    in
	Msg.send (bio, MsgRevoke acl);
	case Msg.recv bio of
	    NONE => print "Server closed connection unexpectedly.\n"
	  | SOME m =>
	    case m of
		MsgOk => print "Revoke succeeded.\n"
	      | MsgError s => print ("Revoke failed: " ^ s ^ "\n")
	      | _ => print "Unexpected server reply.\n";
	OpenSSL.close bio
    end

fun service () =
    let
	val () = Acl.read Config.aclFile

	val context = OpenSSL.context (Config.serverCert,
				       Config.serverKey,
				       Config.trustStore)
	val _ = Domain.set_context context

	val sock = OpenSSL.listen (context, Config.dispatcherPort)

	fun loop () =
	    case OpenSSL.accept sock of
		NONE => ()
	      | SOME bio =>
		let
		    val user = OpenSSL.peerCN bio
		    val () = print ("\nConnection from " ^ user ^ "\n")
		    val () = Domain.setUser user

		    fun cmdLoop () =
			case Msg.recv bio of
			    NONE => (OpenSSL.close bio
				     handle OpenSSL.OpenSSL _ => ();
				     loop ())
			  | SOME m =>
			    case m of
				MsgConfig code =>
				let
				    val _ = print "Configuration:\n"
				    val _ = print code
				    val _ = print "\n"

				    val outname = OS.FileSys.tmpName ()
				    val outf = TextIO.openOut outname
				in
				    TextIO.output (outf, code);
				    TextIO.closeOut outf;
				    (eval outname;
				     Msg.send (bio, MsgOk))
				    handle ErrorMsg.Error =>
					   (print "Compilation error\n";
					    Msg.send (bio,
						      MsgError "Error during configuration evaluation"))
					 | OpenSSL.OpenSSL s =>
					   (print "OpenSSL error\n";
					    Msg.send (bio,
						      MsgError
							  ("Error during configuration evaluation: "
							   ^ s)));
				    OS.FileSys.remove outname;
				    (ignore (OpenSSL.readChar bio);
				     OpenSSL.close bio)
				    handle OpenSSL.OpenSSL _ => ();
				    loop ()
				end

			      | MsgGrant acl =>
				if Acl.query {user = user, class = "group", value = "root"} then
				    ((Acl.grant acl;
				      Acl.write Config.aclFile;
				      Msg.send (bio, MsgOk);
				      print ("Granted permission " ^ #value acl ^ " to " ^ #user acl ^ " in " ^ #class acl ^ ".\n"))
				     handle OpenSSL.OpenSSL s =>
					    (print "OpenSSL error\n";
					     Msg.send (bio,
						       MsgError
							   ("Error during granting: "
							    ^ s)));
				    (ignore (OpenSSL.readChar bio);
				     OpenSSL.close bio)
				    handle OpenSSL.OpenSSL _ => ();
				    loop ())
				else
				    ((Msg.send (bio, MsgError "Not authorized to grant privileges");
				      print "Unauthorized user asked to grant a permission!\n";
				      ignore (OpenSSL.readChar bio);
				      OpenSSL.close bio)
				     handle OpenSSL.OpenSSL _ => ();
				     loop ())

			      | MsgRevoke acl =>
				if Acl.query {user = user, class = "group", value = "root"} then
				    ((Acl.revoke acl;
				      Acl.write Config.aclFile;
				      Msg.send (bio, MsgOk);
				      print ("Revoked permission " ^ #value acl ^ " from " ^ #user acl ^ " in " ^ #class acl ^ ".\n"))
				     handle OpenSSL.OpenSSL s =>
					    (print "OpenSSL error\n";
					     Msg.send (bio,
						       MsgError
							   ("Error during revocation: "
							    ^ s)));
				    (ignore (OpenSSL.readChar bio);
				     OpenSSL.close bio)
				    handle OpenSSL.OpenSSL _ => ();
				    loop ())
				else
				    ((Msg.send (bio, MsgError "Not authorized to revoke privileges");
				      print "Unauthorized user asked to revoke a permission!\n";
				      ignore (OpenSSL.readChar bio);
				      OpenSSL.close bio)
				     handle OpenSSL.OpenSSL _ => ();
				     loop ())

			      | _ =>
				(Msg.send (bio, MsgError "Unexpected command")
				 handle OpenSSL.OpenSSL _ => ();
				 OpenSSL.close bio
				 handle OpenSSL.OpenSSL _ => ();
				 loop ())
		in
		    cmdLoop ()
		end
		    handle OpenSSL.OpenSSL s =>
			   (print ("OpenSSL error: " ^ s ^ "\n");
			    OpenSSL.close bio
			    handle OpenSSL.OpenSSL _ => ();
			    loop ())
			 | OS.SysErr (s, _) =>
			   (print ("System error: " ^ s ^ "\n");
			    OpenSSL.close bio
			    handle OpenSSL.OpenSSL _ => ();
			    loop ())
    in
	print "Listening for connections....\n";
	loop ();
	OpenSSL.shutdown sock
    end

fun slave () =
    let
	val host = Slave.hostname ()

	val context = OpenSSL.context (Config.certDir ^ "/" ^ host ^ ".pem",
				       Config.keyDir ^ "/" ^ host ^ "/key.pem",
				       Config.trustStore)

	val sock = OpenSSL.listen (context, Config.slavePort)

	fun loop () =
	    case OpenSSL.accept sock of
		NONE => ()
	      | SOME bio =>
		let
		    val peer = OpenSSL.peerCN bio
		    val () = print ("\nConnection from " ^ peer ^ "\n")
		in
		    if peer <> Config.dispatcherName then
			(print "Not authorized!\n";
			 OpenSSL.close bio;
			 loop ())
		    else let
			    fun loop' files =
				case Msg.recv bio of
				    NONE => print "Dispatcher closed connection unexpectedly\n"
				  | SOME m =>
				    case m of
					MsgFile file => loop' (file :: files)
				      | MsgDoFiles => (Slave.handleChanges files;
						       Msg.send (bio, MsgOk))
				      | _ => (print "Dispatcher sent unexpected command\n";
					      Msg.send (bio, MsgError "Unexpected command"))
			in
			    loop' [];
			    ignore (OpenSSL.readChar bio);
			    OpenSSL.close bio;
			    loop ()
			end
		end handle OpenSSL.OpenSSL s =>
			   (print ("OpenSSL error: "^ s ^ "\n");
			    OpenSSL.close bio
					  handle OpenSSL.OpenSSL _ => ();
			    loop ())
			 | OS.SysErr (s, _) =>
			   (print ("System error: "^ s ^ "\n");
			    OpenSSL.close bio
			    handle OpenSSL.OpenSSL _ => ();
			    loop ())
    in
	loop ();
	OpenSSL.shutdown sock
    end

fun autodocBasis outdir =
    let
	val dir = Posix.FileSys.opendir Config.libRoot

	fun loop files =
	    case Posix.FileSys.readdir dir of
		NONE => (Posix.FileSys.closedir dir;
			 files)
	      | SOME fname =>
		if String.isSuffix ".dtl" fname then
		    loop (OS.Path.joinDirFile {dir = Config.libRoot,
					       file = fname}
			  :: files)
		else
		    loop files

	val files = loop []
    in
	Autodoc.autodoc {outdir = outdir, infiles = files}
    end

end
Commit	Line	Data
	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	(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	fun reduce fname =
	96	let
	97	val (G, body) = check fname
	98	in
	99	if !ErrorMsg.anyErrors then
	100	NONE
	101	else
	102	case body of
	103	SOME body =>
	104	let
	105	val body' = Reduce.reduceExp G body
	106	in
	107	(*printd (PD.hovBox (PD.PPS.Rel 0,
	108	[PD.string "Result:",
	109	PD.space 1,
	110	p_exp body']))*)
	111	SOME body'
	112	end
	113	\| _ => NONE
	114	end
	115
	116	fun eval fname =
	117	case reduce fname of
	118	(SOME body') =>
	119	if !ErrorMsg.anyErrors then
	120	raise ErrorMsg.Error
	121	else
	122	Eval.exec (Defaults.eInit ()) body'
	123	\| NONE => raise ErrorMsg.Error
	124
	125	val dispatcher =
	126	Config.dispatcher ^ ":" ^ Int.toString Config.dispatcherPort
	127
	128	fun requestContext f =
	129	let
	130	val uid = Posix.ProcEnv.getuid ()
	131	val user = Posix.SysDB.Passwd.name (Posix.SysDB.getpwuid uid)
	132
	133	val () = Acl.read Config.aclFile
	134	val () = Domain.setUser user
	135
	136	val () = f ()
	137
	138	val context = OpenSSL.context (Config.certDir ^ "/" ^ user ^ ".pem",
	139	Config.keyDir ^ "/" ^ user ^ "/key.pem",
	140	Config.trustStore)
	141	in
	142	(user, context)
	143	end
	144
	145	fun requestBio f =
	146	let
	147	val (user, context) = requestContext f
	148	in
	149	(user, OpenSSL.connect (context, dispatcher))
	150	end
	151
	152	fun request fname =
	153	let
	154	val (user, bio) = requestBio (fn () => ignore (check fname))
	155
	156	val inf = TextIO.openIn fname
	157
	158	fun loop lines =
	159	case TextIO.inputLine inf of
	160	NONE => String.concat (List.rev lines)
	161	\| SOME line => loop (line :: lines)
	162
	163	val code = loop []
	164	in
	165	TextIO.closeIn inf;
	166	Msg.send (bio, MsgConfig code);
	167	case Msg.recv bio of
	168	NONE => print "Server closed connection unexpectedly.\n"
	169	\| SOME m =>
	170	case m of
	171	MsgOk => print "Configuration succeeded.\n"
	172	\| MsgError s => print ("Configuration failed: " ^ s ^ "\n")
	173	\| _ => print "Unexpected server reply.\n";
	174	OpenSSL.close bio
	175	end
	176	handle ErrorMsg.Error => ()
	177
	178	fun requestGrant acl =
	179	let
	180	val (user, bio) = requestBio (fn () => ())
	181	in
	182	Msg.send (bio, MsgGrant acl);
	183	case Msg.recv bio of
	184	NONE => print "Server closed connection unexpectedly.\n"
	185	\| SOME m =>
	186	case m of
	187	MsgOk => print "Grant succeeded.\n"
	188	\| MsgError s => print ("Grant failed: " ^ s ^ "\n")
	189	\| _ => print "Unexpected server reply.\n";
	190	OpenSSL.close bio
	191	end
	192
	193	fun requestRevoke acl =
	194	let
	195	val (user, bio) = requestBio (fn () => ())
	196	in
	197	Msg.send (bio, MsgRevoke acl);
	198	case Msg.recv bio of
	199	NONE => print "Server closed connection unexpectedly.\n"
	200	\| SOME m =>
	201	case m of
	202	MsgOk => print "Revoke succeeded.\n"
	203	\| MsgError s => print ("Revoke failed: " ^ s ^ "\n")
	204	\| _ => print "Unexpected server reply.\n";
	205	OpenSSL.close bio
	206	end
	207
	208	fun service () =
	209	let
	210	val () = Acl.read Config.aclFile
	211
	212	val context = OpenSSL.context (Config.serverCert,
	213	Config.serverKey,
	214	Config.trustStore)
	215	val _ = Domain.set_context context
	216
	217	val sock = OpenSSL.listen (context, Config.dispatcherPort)
	218
	219	fun loop () =
	220	case OpenSSL.accept sock of
	221	NONE => ()
	222	\| SOME bio =>
	223	let
	224	val user = OpenSSL.peerCN bio
	225	val () = print ("\nConnection from " ^ user ^ "\n")
	226	val () = Domain.setUser user
	227
	228	fun cmdLoop () =
	229	case Msg.recv bio of
	230	NONE => (OpenSSL.close bio
	231	handle OpenSSL.OpenSSL _ => ();
	232	loop ())
	233	\| SOME m =>
	234	case m of
	235	MsgConfig code =>
	236	let
	237	val _ = print "Configuration:\n"
	238	val _ = print code
	239	val _ = print "\n"
	240
	241	val outname = OS.FileSys.tmpName ()
	242	val outf = TextIO.openOut outname
	243	in
	244	TextIO.output (outf, code);
	245	TextIO.closeOut outf;
	246	(eval outname;
	247	Msg.send (bio, MsgOk))
	248	handle ErrorMsg.Error =>
	249	(print "Compilation error\n";
	250	Msg.send (bio,
	251	MsgError "Error during configuration evaluation"))
	252	\| OpenSSL.OpenSSL s =>
	253	(print "OpenSSL error\n";
	254	Msg.send (bio,
	255	MsgError
	256	("Error during configuration evaluation: "
	257	^ s)));
	258	OS.FileSys.remove outname;
	259	(ignore (OpenSSL.readChar bio);
	260	OpenSSL.close bio)
	261	handle OpenSSL.OpenSSL _ => ();
	262	loop ()
	263	end
	264
	265	\| MsgGrant acl =>
	266	if Acl.query {user = user, class = "group", value = "root"} then
	267	((Acl.grant acl;
	268	Acl.write Config.aclFile;
	269	Msg.send (bio, MsgOk);
	270	print ("Granted permission " ^ #value acl ^ " to " ^ #user acl ^ " in " ^ #class acl ^ ".\n"))
	271	handle OpenSSL.OpenSSL s =>
	272	(print "OpenSSL error\n";
	273	Msg.send (bio,
	274	MsgError
	275	("Error during granting: "
	276	^ s)));
	277	(ignore (OpenSSL.readChar bio);
	278	OpenSSL.close bio)
	279	handle OpenSSL.OpenSSL _ => ();
	280	loop ())
	281	else
	282	((Msg.send (bio, MsgError "Not authorized to grant privileges");
	283	print "Unauthorized user asked to grant a permission!\n";
	284	ignore (OpenSSL.readChar bio);
	285	OpenSSL.close bio)
	286	handle OpenSSL.OpenSSL _ => ();
	287	loop ())
	288
	289	\| MsgRevoke acl =>
	290	if Acl.query {user = user, class = "group", value = "root"} then
	291	((Acl.revoke acl;
	292	Acl.write Config.aclFile;
	293	Msg.send (bio, MsgOk);
	294	print ("Revoked permission " ^ #value acl ^ " from " ^ #user acl ^ " in " ^ #class acl ^ ".\n"))
	295	handle OpenSSL.OpenSSL s =>
	296	(print "OpenSSL error\n";
	297	Msg.send (bio,
	298	MsgError
	299	("Error during revocation: "
	300	^ s)));
	301	(ignore (OpenSSL.readChar bio);
	302	OpenSSL.close bio)
	303	handle OpenSSL.OpenSSL _ => ();
	304	loop ())
	305	else
	306	((Msg.send (bio, MsgError "Not authorized to revoke privileges");
	307	print "Unauthorized user asked to revoke a permission!\n";
	308	ignore (OpenSSL.readChar bio);
	309	OpenSSL.close bio)
	310	handle OpenSSL.OpenSSL _ => ();
	311	loop ())
	312
	313	\| _ =>
	314	(Msg.send (bio, MsgError "Unexpected command")
	315	handle OpenSSL.OpenSSL _ => ();
	316	OpenSSL.close bio
	317	handle OpenSSL.OpenSSL _ => ();
	318	loop ())
	319	in
	320	cmdLoop ()
	321	end
	322	handle OpenSSL.OpenSSL s =>
	323	(print ("OpenSSL error: " ^ s ^ "\n");
	324	OpenSSL.close bio
	325	handle OpenSSL.OpenSSL _ => ();
	326	loop ())
	327	\| OS.SysErr (s, _) =>
	328	(print ("System error: " ^ s ^ "\n");
	329	OpenSSL.close bio
	330	handle OpenSSL.OpenSSL _ => ();
	331	loop ())
	332	in
	333	print "Listening for connections....\n";
	334	loop ();
	335	OpenSSL.shutdown sock
	336	end
	337
	338	fun slave () =
	339	let
	340	val host = Slave.hostname ()
	341
	342	val context = OpenSSL.context (Config.certDir ^ "/" ^ host ^ ".pem",
	343	Config.keyDir ^ "/" ^ host ^ "/key.pem",
	344	Config.trustStore)
	345
	346	val sock = OpenSSL.listen (context, Config.slavePort)
	347
	348	fun loop () =
	349	case OpenSSL.accept sock of
	350	NONE => ()
	351	\| SOME bio =>
	352	let
	353	val peer = OpenSSL.peerCN bio
	354	val () = print ("\nConnection from " ^ peer ^ "\n")
	355	in
	356	if peer <> Config.dispatcherName then
	357	(print "Not authorized!\n";
	358	OpenSSL.close bio;
	359	loop ())
	360	else let
	361	fun loop' files =
	362	case Msg.recv bio of
	363	NONE => print "Dispatcher closed connection unexpectedly\n"
	364	\| SOME m =>
	365	case m of
	366	MsgFile file => loop' (file :: files)
	367	\| MsgDoFiles => (Slave.handleChanges files;
	368	Msg.send (bio, MsgOk))
	369	\| _ => (print "Dispatcher sent unexpected command\n";
	370	Msg.send (bio, MsgError "Unexpected command"))
	371	in
	372	loop' [];
	373	ignore (OpenSSL.readChar bio);
	374	OpenSSL.close bio;
	375	loop ()
	376	end
	377	end handle OpenSSL.OpenSSL s =>
	378	(print ("OpenSSL error: "^ s ^ "\n");
	379	OpenSSL.close bio
	380	handle OpenSSL.OpenSSL _ => ();
	381	loop ())
	382	\| OS.SysErr (s, _) =>
	383	(print ("System error: "^ s ^ "\n");
	384	OpenSSL.close bio
	385	handle OpenSSL.OpenSSL _ => ();
	386	loop ())
	387	in
	388	loop ();
	389	OpenSSL.shutdown sock
	390	end
	391
	392	fun autodocBasis outdir =
	393	let
	394	val dir = Posix.FileSys.opendir Config.libRoot
	395
	396	fun loop files =
	397	case Posix.FileSys.readdir dir of
	398	NONE => (Posix.FileSys.closedir dir;
	399	files)
	400	\| SOME fname =>
	401	if String.isSuffix ".dtl" fname then
	402	loop (OS.Path.joinDirFile {dir = Config.libRoot,
	403	file = fname}
	404	:: files)
	405	else
	406	loop files
	407
	408	val files = loop []
	409	in
	410	Autodoc.autodoc {outdir = outdir, infiles = files}
	411	end
	412
	413	end