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|
(* Copyright (c) 2008-2012, Adam Chlipala
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - The names of contributors may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*)
val socket = ".urweb_daemon"
(* Encapsulate main invocation handler in a function, possibly to be called multiple times within a daemon. *)
exception Code of OS.Process.status
fun oneRun args =
let
val timing = ref false
val tc = ref false
val sources = ref ([] : string list)
val demo = ref (NONE : (string * bool) option)
val tutorial = ref false
val css = ref false
val () = (Compiler.debug := false;
Elaborate.verbose := false;
Elaborate.dumpTypes := false;
Elaborate.dumpTypesOnError := false;
Elaborate.unifyMore := false;
Compiler.dumpSource := false;
Compiler.doIflow := false;
Demo.noEmacs := false;
Settings.setDebug false)
val () = Compiler.beforeC := MLton.GC.pack
fun printVersion () = (print (Config.versionString ^ "\n");
raise Code OS.Process.success)
fun printNumericVersion () = (print (Config.versionNumber ^ "\n");
raise Code OS.Process.success)
fun doArgs args =
case args of
[] => ()
| "-version" :: rest =>
printVersion ()
| "-numeric-version" :: rest =>
printNumericVersion ()
| "-css" :: rest =>
(css := true;
doArgs rest)
| "-demo" :: prefix :: rest =>
(demo := SOME (prefix, false);
doArgs rest)
| "-guided-demo" :: prefix :: rest =>
(demo := SOME (prefix, true);
doArgs rest)
| "-tutorial" :: rest =>
(tutorial := true;
doArgs rest)
| "-protocol" :: name :: rest =>
(Settings.setProtocol name;
doArgs rest)
| "-prefix" :: prefix :: rest =>
(Settings.setUrlPrefix prefix;
doArgs rest)
| "-db" :: s :: rest =>
(Settings.setDbstring (SOME s);
doArgs rest)
| "-dbms" :: name :: rest =>
(Settings.setDbms name;
doArgs rest)
| "-debug" :: rest =>
(Settings.setDebug true;
doArgs rest)
| "-verbose" :: rest =>
(Compiler.debug := true;
Elaborate.verbose := true;
doArgs rest)
| "-timing" :: rest =>
(timing := true;
doArgs rest)
| "-tc" :: rest =>
(tc := true;
doArgs rest)
| "-dumpTypes" :: rest =>
(Elaborate.dumpTypes := true;
doArgs rest)
| "-dumpTypesOnError" :: rest =>
(Elaborate.dumpTypesOnError := true;
doArgs rest)
| "-unifyMore" :: rest =>
(Elaborate.unifyMore := true;
doArgs rest)
| "-dumpSource" :: rest =>
(Compiler.dumpSource := true;
doArgs rest)
| "-output" :: s :: rest =>
(Settings.setExe (SOME s);
doArgs rest)
| "-sql" :: s :: rest =>
(Settings.setSql (SOME s);
doArgs rest)
| "-static" :: rest =>
(Settings.setStaticLinking true;
doArgs rest)
| "-path" :: name :: path :: rest =>
(Compiler.addPath (name, path);
doArgs rest)
| "-root" :: name :: root :: rest =>
(Compiler.addModuleRoot (root, name);
doArgs rest)
| "-boot" :: rest =>
(Compiler.enableBoot ();
Settings.setStaticLinking true;
doArgs rest)
| "-sigfile" :: name :: rest =>
(Settings.setSigFile (SOME name);
doArgs rest)
| "-iflow" :: rest =>
(Compiler.doIflow := true;
doArgs rest)
| "-moduleOf" :: fname :: _ =>
(print (Compiler.moduleOf fname ^ "\n");
raise Code OS.Process.success)
| "-noEmacs" :: rest =>
(Demo.noEmacs := true;
doArgs rest)
| "-limit" :: class :: num :: rest =>
(case Int.fromString num of
NONE => raise Fail ("Invalid limit number '" ^ num ^ "'")
| SOME n =>
if n < 0 then
raise Fail ("Invalid limit number '" ^ num ^ "'")
else
Settings.addLimit (class, n);
doArgs rest)
| arg :: rest =>
(if size arg > 0 andalso String.sub (arg, 0) = #"-" then
raise Fail ("Unknown flag " ^ arg)
else
sources := arg :: !sources;
doArgs rest)
val () = case args of
["daemon", "stop"] => OS.Process.exit OS.Process.success
| _ => ()
val () = doArgs args
val job =
case !sources of
[file] => file
| files =>
if List.exists (fn s => s <> "-version") args then
raise Fail ("Zero or multiple input files specified; only one is allowed.\nFiles: "
^ String.concatWith ", " files)
else
printVersion ()
in
case (!css, !demo, !tutorial) of
(true, _, _) =>
(case Compiler.run Compiler.toCss job of
NONE => OS.Process.failure
| SOME {Overall = ov, Classes = cl} =>
(app (print o Css.inheritableToString) ov;
print "\n";
app (fn (x, (ins, ots)) =>
(print x;
print " ";
app (print o Css.inheritableToString) ins;
app (print o Css.othersToString) ots;
print "\n")) cl;
OS.Process.success))
| (_, SOME (prefix, guided), _) =>
if Demo.make' {prefix = prefix, dirname = job, guided = guided} then
OS.Process.success
else
OS.Process.failure
| (_, _, true) => (Tutorial.make job;
OS.Process.success)
| _ =>
if !tc then
(Compiler.check Compiler.toElaborate job;
if ErrorMsg.anyErrors () then
OS.Process.failure
else
OS.Process.success)
else if !timing then
(Compiler.time Compiler.toCjrize job;
OS.Process.success)
else
(if Compiler.compile job then
OS.Process.success
else
OS.Process.failure)
end handle Code n => n
fun send (sock, s) =
let
val n = Socket.sendVec (sock, Word8VectorSlice.full (Vector.map (Word8.fromInt o ord) s))
in
if n >= size s then
()
else
send (sock, String.extract (s, n, NONE))
end
val () = case CommandLine.arguments () of
["daemon", "start"] =>
(case Posix.Process.fork () of
SOME _ => ()
| NONE =>
let
val () = Elaborate.incremental := true
val listen = UnixSock.Strm.socket ()
fun loop () =
let
val (sock, _) = Socket.accept listen
fun loop' (buf, args) =
let
val s = if CharVector.exists (fn ch => ch = #"\n") buf then
""
else
Vector.map (chr o Word8.toInt) (Socket.recvVec (sock, 1024))
val s = buf ^ s
val (befor, after) = Substring.splitl (fn ch => ch <> #"\n") (Substring.full s)
in
if Substring.isEmpty after then
loop' (s, args)
else
let
val cmd = Substring.string befor
val rest = Substring.string (Substring.slice (after, 1, NONE))
in
case cmd of
"" =>
let
val success = (oneRun (rev args))
handle ex => (print "unhandled exception:\n";
print (General.exnMessage ex ^ "\n");
OS.Process.failure)
in
TextIO.flushOut TextIO.stdOut;
TextIO.flushOut TextIO.stdErr;
send (sock, if OS.Process.isSuccess success then
"\001"
else
"\002")
end
| _ => loop' (rest, cmd :: args)
end
end handle OS.SysErr _ => ()
fun redirect old =
Posix.IO.dup2 {old = valOf (Posix.FileSys.iodToFD (Socket.ioDesc sock)),
new = old}
val oldStdout = Posix.IO.dup Posix.FileSys.stdout
val oldStderr = Posix.IO.dup Posix.FileSys.stderr
in
(* Redirect the daemon's output to the socket. *)
redirect Posix.FileSys.stdout;
redirect Posix.FileSys.stderr;
loop' ("", []);
Socket.close sock;
Posix.IO.dup2 {old = oldStdout, new = Posix.FileSys.stdout};
Posix.IO.dup2 {old = oldStderr, new = Posix.FileSys.stderr};
Posix.IO.close oldStdout;
Posix.IO.close oldStderr;
MLton.GC.pack ();
loop ()
end
in
OS.Process.atExit (fn () => OS.FileSys.remove socket);
Socket.bind (listen, UnixSock.toAddr socket);
Socket.listen (listen, 1);
loop ()
end)
| ["daemon", "stop"] =>
(OS.FileSys.remove socket handle OS.SysErr _ => OS.Process.exit OS.Process.success)
| args =>
let
val sock = UnixSock.Strm.socket ()
fun wait () =
let
val v = Socket.recvVec (sock, 1024)
in
if Vector.length v = 0 then
OS.Process.failure
else
let
val s = Vector.map (chr o Word8.toInt) v
val last = Vector.sub (v, Vector.length v - 1)
val (rc, s) = if last = Word8.fromInt 1 then
(SOME OS.Process.success, String.substring (s, 0, size s - 1))
else if last = Word8.fromInt 2 then
(SOME OS.Process.failure, String.substring (s, 0, size s - 1))
else
(NONE, s)
in
print s;
case rc of
NONE => wait ()
| SOME rc => rc
end
end handle OS.SysErr _ => OS.Process.failure
in
if Socket.connectNB (sock, UnixSock.toAddr socket)
orelse not (List.null (#wrs (Socket.select {rds = [],
wrs = [Socket.sockDesc sock],
exs = [],
timeout = SOME (Time.fromSeconds 1)}))) then
(app (fn arg => send (sock, arg ^ "\n")) args;
send (sock, "\n");
OS.Process.exit (wait ()))
else
(OS.FileSys.remove socket;
raise OS.SysErr ("", NONE))
end handle OS.SysErr _ => OS.Process.exit (oneRun args)
|
