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annotate src/main.mlton.sml @ 1744:6fcce0592178

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Send daemon output to calling process
author Adam Chlipala <adam@chlipala.net>
date Sat, 05 May 2012 12:45:35 -0400
parents c414850f206f
children 518e0b23c4ef
rev   line source
adam@1677 1 (* Copyright (c) 2008-2012, Adam Chlipala
adamc@0 2 * All rights reserved.
adamc@0 3 *
adamc@0 4 * Redistribution and use in source and binary forms, with or without
adamc@0 5 * modification, are permitted provided that the following conditions are met:
adamc@0 6 *
adamc@0 7 * - Redistributions of source code must retain the above copyright notice,
adamc@0 8 * this list of conditions and the following disclaimer.
adamc@0 9 * - Redistributions in binary form must reproduce the above copyright notice,
adamc@0 10 * this list of conditions and the following disclaimer in the documentation
adamc@0 11 * and/or other materials provided with the distribution.
adamc@0 12 * - The names of contributors may not be used to endorse or promote products
adamc@0 13 * derived from this software without specific prior written permission.
adamc@0 14 *
adamc@0 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
adamc@0 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
adamc@0 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
adamc@0 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
adamc@0 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
adamc@0 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
adamc@0 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
adamc@0 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
adamc@0 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
adamc@0 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
adamc@0 25 * POSSIBILITY OF SUCH DAMAGE.
adamc@0 26 *)
adamc@0 27
adam@1733 28 val socket = ".urweb_daemon"
adamc@857 29
adam@1733 30 (* Encapsulate main invocation handler in a function, possibly to be called multiple times within a daemon. *)
adam@1540 31
adam@1733 32 exception Code of OS.Process.status
adam@1520 33
adam@1733 34 fun oneRun args =
adam@1733 35 let
adam@1733 36 val timing = ref false
adam@1733 37 val tc = ref false
adam@1733 38 val sources = ref ([] : string list)
adam@1733 39 val demo = ref (NONE : (string * bool) option)
adam@1733 40 val tutorial = ref false
adam@1733 41 val css = ref false
adamc@208 42
adam@1733 43 val () = (Compiler.debug := false;
adam@1744 44 Elaborate.verbose := false;
adam@1733 45 Elaborate.dumpTypes := false;
adam@1733 46 Elaborate.unifyMore := false;
adam@1733 47 Compiler.dumpSource := false;
adam@1733 48 Compiler.doIflow := false;
adam@1733 49 Demo.noEmacs := false;
adam@1733 50 Settings.setDebug false)
adamc@208 51
adam@1733 52 val () = Compiler.beforeC := MLton.GC.pack
adamc@279 53
adam@1733 54 fun printVersion () = (print (Config.versionString ^ "\n");
adam@1733 55 raise Code OS.Process.success)
adam@1733 56 fun printNumericVersion () = (print (Config.versionNumber ^ "\n");
adam@1733 57 raise Code OS.Process.success)
adam@1733 58
adam@1733 59 fun doArgs args =
adam@1733 60 case args of
adam@1733 61 [] => ()
adam@1733 62 | "-version" :: rest =>
adam@1733 63 printVersion ()
adam@1733 64 | "-numeric-version" :: rest =>
adam@1733 65 printNumericVersion ()
adam@1733 66 | "-css" :: rest =>
adam@1733 67 (css := true;
adam@1733 68 doArgs rest)
adam@1733 69 | "-demo" :: prefix :: rest =>
adam@1733 70 (demo := SOME (prefix, false);
adam@1733 71 doArgs rest)
adam@1733 72 | "-guided-demo" :: prefix :: rest =>
adam@1733 73 (demo := SOME (prefix, true);
adam@1733 74 doArgs rest)
adam@1733 75 | "-tutorial" :: rest =>
adam@1733 76 (tutorial := true;
adam@1733 77 doArgs rest)
adam@1733 78 | "-protocol" :: name :: rest =>
adam@1733 79 (Settings.setProtocol name;
adam@1733 80 doArgs rest)
adam@1733 81 | "-prefix" :: prefix :: rest =>
adam@1733 82 (Settings.setUrlPrefix prefix;
adam@1733 83 doArgs rest)
adam@1733 84 | "-db" :: s :: rest =>
adam@1733 85 (Settings.setDbstring (SOME s);
adam@1733 86 doArgs rest)
adam@1733 87 | "-dbms" :: name :: rest =>
adam@1733 88 (Settings.setDbms name;
adam@1733 89 doArgs rest)
adam@1733 90 | "-debug" :: rest =>
adam@1733 91 (Settings.setDebug true;
adam@1733 92 doArgs rest)
adam@1733 93 | "-verbose" :: rest =>
adam@1733 94 (Compiler.debug := true;
adam@1744 95 Elaborate.verbose := true;
adam@1733 96 doArgs rest)
adam@1733 97 | "-timing" :: rest =>
adam@1733 98 (timing := true;
adam@1733 99 doArgs rest)
adam@1733 100 | "-tc" :: rest =>
adam@1733 101 (tc := true;
adam@1733 102 doArgs rest)
adam@1733 103 | "-dumpTypes" :: rest =>
adam@1733 104 (Elaborate.dumpTypes := true;
adam@1733 105 doArgs rest)
adam@1733 106 | "-unifyMore" :: rest =>
adam@1733 107 (Elaborate.unifyMore := true;
adam@1733 108 doArgs rest)
adam@1733 109 | "-dumpSource" :: rest =>
adam@1733 110 (Compiler.dumpSource := true;
adam@1733 111 doArgs rest)
adam@1733 112 | "-output" :: s :: rest =>
adam@1733 113 (Settings.setExe (SOME s);
adam@1733 114 doArgs rest)
adam@1733 115 | "-sql" :: s :: rest =>
adam@1733 116 (Settings.setSql (SOME s);
adam@1733 117 doArgs rest)
adam@1733 118 | "-static" :: rest =>
adam@1733 119 (Settings.setStaticLinking true;
adam@1733 120 doArgs rest)
adam@1733 121 | "-path" :: name :: path :: rest =>
adam@1733 122 (Compiler.addPath (name, path);
adam@1733 123 doArgs rest)
adam@1733 124 | "-root" :: name :: root :: rest =>
adam@1733 125 (Compiler.addModuleRoot (root, name);
adam@1733 126 doArgs rest)
ezyang@1739 127 | "-boot" :: rest =>
ezyang@1739 128 (Compiler.enableBoot ();
ezyang@1739 129 Settings.setStaticLinking true;
ezyang@1739 130 doArgs rest)
adam@1733 131 | "-sigfile" :: name :: rest =>
adam@1733 132 (Settings.setSigFile (SOME name);
adam@1733 133 doArgs rest)
adam@1733 134 | "-iflow" :: rest =>
adam@1733 135 (Compiler.doIflow := true;
adam@1733 136 doArgs rest)
adam@1733 137 | "-moduleOf" :: fname :: _ =>
adam@1733 138 (print (Compiler.moduleOf fname ^ "\n");
adam@1733 139 raise Code OS.Process.success)
adam@1733 140 | "-noEmacs" :: rest =>
adam@1733 141 (Demo.noEmacs := true;
adam@1733 142 doArgs rest)
adam@1733 143 | "-limit" :: class :: num :: rest =>
adam@1733 144 (case Int.fromString num of
adam@1733 145 NONE => raise Fail ("Invalid limit number '" ^ num ^ "'")
adam@1733 146 | SOME n =>
adam@1733 147 if n < 0 then
adam@1733 148 raise Fail ("Invalid limit number '" ^ num ^ "'")
adam@1733 149 else
adam@1733 150 Settings.addLimit (class, n);
adam@1733 151 doArgs rest)
adam@1733 152 | arg :: rest =>
adam@1733 153 (if size arg > 0 andalso String.sub (arg, 0) = #"-" then
adam@1733 154 raise Fail ("Unknown flag " ^ arg)
adam@1733 155 else
adam@1733 156 sources := arg :: !sources;
adam@1733 157 doArgs rest)
adam@1733 158
adam@1733 159 val () = case args of
adam@1733 160 ["daemon", "stop"] => OS.Process.exit OS.Process.success
adam@1733 161 | _ => ()
adam@1733 162
adam@1733 163 val () = doArgs args
adam@1733 164
adam@1733 165 val job =
adam@1733 166 case !sources of
adam@1733 167 [file] => file
adam@1733 168 | _ => printVersion ()
adam@1733 169 in
adam@1733 170 case (!css, !demo, !tutorial) of
adam@1733 171 (true, _, _) =>
adam@1733 172 (case Compiler.run Compiler.toCss job of
adam@1733 173 NONE => OS.Process.failure
adam@1733 174 | SOME {Overall = ov, Classes = cl} =>
adam@1733 175 (app (print o Css.inheritableToString) ov;
adam@1733 176 print "\n";
adam@1733 177 app (fn (x, (ins, ots)) =>
adam@1733 178 (print x;
adam@1733 179 print " ";
adam@1733 180 app (print o Css.inheritableToString) ins;
adam@1733 181 app (print o Css.othersToString) ots;
adam@1733 182 print "\n")) cl;
adam@1733 183 OS.Process.success))
adam@1733 184 | (_, SOME (prefix, guided), _) =>
adam@1733 185 if Demo.make' {prefix = prefix, dirname = job, guided = guided} then
adam@1733 186 OS.Process.success
adam@1733 187 else
adam@1733 188 OS.Process.failure
adam@1733 189 | (_, _, true) => (Tutorial.make job;
adam@1733 190 OS.Process.success)
adam@1733 191 | _ =>
adam@1733 192 if !tc then
adam@1733 193 (Compiler.check Compiler.toElaborate job;
adam@1733 194 if ErrorMsg.anyErrors () then
adam@1733 195 OS.Process.failure
adam@1733 196 else
adam@1733 197 OS.Process.success)
adam@1733 198 else if !timing then
adam@1733 199 (Compiler.time Compiler.toCjrize job;
adam@1733 200 OS.Process.success)
adam@1733 201 else
adam@1733 202 (if Compiler.compile job then
adam@1733 203 OS.Process.success
adam@1733 204 else
adam@1733 205 OS.Process.failure)
adam@1733 206 end handle Code n => n
adam@1733 207
adam@1733 208 fun send (sock, s) =
adam@1733 209 let
adam@1733 210 val n = Socket.sendVec (sock, Word8VectorSlice.full (Vector.map (Word8.fromInt o ord) s))
adam@1733 211 in
adam@1733 212 if n >= size s then
adam@1733 213 ()
adamc@384 214 else
adam@1733 215 send (sock, String.extract (s, n, NONE))
adam@1733 216 end
adam@1733 217
adam@1733 218 val () = case CommandLine.arguments () of
adam@1733 219 ["daemon", "start"] =>
adam@1733 220 (case Posix.Process.fork () of
adam@1733 221 SOME _ => ()
adam@1733 222 | NONE =>
adam@1733 223 let
adam@1733 224 val () = Elaborate.incremental := true
adam@1733 225 val listen = UnixSock.Strm.socket ()
adam@1733 226
adam@1733 227 fun loop () =
adam@1733 228 let
adam@1733 229 val (sock, _) = Socket.accept listen
adam@1733 230
adam@1733 231 fun loop' (buf, args) =
adam@1733 232 let
adam@1733 233 val s = if CharVector.exists (fn ch => ch = #"\n") buf then
adam@1733 234 ""
adam@1733 235 else
adam@1733 236 Vector.map (chr o Word8.toInt) (Socket.recvVec (sock, 1024))
adam@1733 237 val s = buf ^ s
adam@1733 238 val (befor, after) = Substring.splitl (fn ch => ch <> #"\n") (Substring.full s)
adam@1733 239 in
adam@1733 240 if Substring.isEmpty after then
adam@1733 241 loop' (s, args)
adam@1733 242 else
adam@1733 243 let
adam@1733 244 val cmd = Substring.string befor
adam@1733 245 val rest = Substring.string (Substring.slice (after, 1, NONE))
adam@1733 246 in
adam@1733 247 case cmd of
adam@1744 248 "" =>
adam@1744 249 let
adam@1744 250 val success = (oneRun (rev args))
adam@1744 251 handle ex => (print "unhandled exception:\n";
adam@1744 252 print (General.exnMessage ex ^ "\n");
adam@1744 253 OS.Process.failure)
adam@1744 254 in
adam@1744 255 TextIO.flushOut TextIO.stdOut;
adam@1744 256 TextIO.flushOut TextIO.stdErr;
adam@1744 257 send (sock, if OS.Process.isSuccess success then
adam@1744 258 "\001"
adam@1744 259 else
adam@1744 260 "\002")
adam@1744 261 end
adam@1733 262 | _ => loop' (rest, cmd :: args)
adam@1733 263 end
adam@1733 264 end handle OS.SysErr _ => ()
adam@1744 265
adam@1744 266 fun redirect old =
adam@1744 267 Posix.IO.dup2 {old = valOf (Posix.FileSys.iodToFD (Socket.ioDesc sock)),
adam@1744 268 new = old}
adam@1744 269
adam@1744 270 val oldStdout = Posix.IO.dup Posix.FileSys.stdout
adam@1744 271 val oldStderr = Posix.IO.dup Posix.FileSys.stderr
adam@1733 272 in
adam@1744 273 (* Redirect the daemon's output to the socket. *)
adam@1744 274 redirect Posix.FileSys.stdout;
adam@1744 275 redirect Posix.FileSys.stderr;
adam@1744 276
adam@1733 277 loop' ("", []);
adam@1733 278 Socket.close sock;
adam@1744 279
adam@1744 280 Posix.IO.dup2 {old = oldStdout, new = Posix.FileSys.stdout};
adam@1744 281 Posix.IO.dup2 {old = oldStderr, new = Posix.FileSys.stderr};
adam@1744 282 Posix.IO.close oldStdout;
adam@1744 283 Posix.IO.close oldStderr;
adam@1744 284
adam@1733 285 MLton.GC.pack ();
adam@1733 286 loop ()
adam@1733 287 end
adam@1733 288 in
adam@1733 289 OS.Process.atExit (fn () => OS.FileSys.remove socket);
adam@1733 290 Socket.bind (listen, UnixSock.toAddr socket);
adam@1733 291 Socket.listen (listen, 1);
adam@1733 292 loop ()
adam@1733 293 end)
adam@1733 294
adam@1733 295 | args =>
adam@1733 296 let
adam@1733 297 val sock = UnixSock.Strm.socket ()
adam@1733 298
adam@1733 299 fun wait () =
adam@1733 300 let
adam@1744 301 val v = Socket.recvVec (sock, 1024)
adam@1733 302 in
adam@1733 303 if Vector.length v = 0 then
adam@1733 304 OS.Process.failure
adam@1733 305 else
adam@1744 306 let
adam@1744 307 val s = Vector.map (chr o Word8.toInt) v
adam@1744 308 val last = Vector.sub (v, Vector.length v - 1)
adam@1744 309 val (rc, s) = if last = Word8.fromInt 1 then
adam@1744 310 (SOME OS.Process.success, String.substring (s, 0, size s - 1))
adam@1744 311 else if last = Word8.fromInt 2 then
adam@1744 312 (SOME OS.Process.failure, String.substring (s, 0, size s - 1))
adam@1744 313 else
adam@1744 314 (NONE, s)
adam@1744 315 in
adam@1744 316 print s;
adam@1744 317 case rc of
adam@1744 318 NONE => wait ()
adam@1744 319 | SOME rc => rc
adam@1744 320 end
adam@1733 321 end handle OS.SysErr _ => OS.Process.failure
adam@1733 322 in
adam@1733 323 if Socket.connectNB (sock, UnixSock.toAddr socket)
adam@1733 324 orelse not (List.null (#wrs (Socket.select {rds = [],
adam@1733 325 wrs = [Socket.sockDesc sock],
adam@1733 326 exs = [],
adam@1733 327 timeout = SOME (Time.fromSeconds 1)}))) then
adam@1733 328 (app (fn arg => send (sock, arg ^ "\n")) args;
adam@1733 329 send (sock, "\n");
adam@1733 330 OS.Process.exit (wait ()))
adam@1733 331 else
adam@1733 332 (OS.FileSys.remove socket;
adam@1733 333 raise OS.SysErr ("", NONE))
adam@1733 334 end handle OS.SysErr _ => case args of
adam@1733 335 ["daemon", "stop"] => (OS.FileSys.remove socket handle OS.SysErr _ => ())
adam@1733 336 | _ => OS.Process.exit (oneRun args)