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annotate src/main.mlton.sml @ 1762:a6eab6820b37

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Lance Hepler's fix to configure.ac; small refactor of fastcgi.c to avoid undefined behavior
author Adam Chlipala <adam@chlipala.net>
date Sun, 13 May 2012 17:41:21 -0400
parents 518e0b23c4ef
children 90ebfac7e1a3
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@1745 46 Elaborate.dumpTypesOnError := false;
adam@1733 47 Elaborate.unifyMore := false;
adam@1733 48 Compiler.dumpSource := false;
adam@1733 49 Compiler.doIflow := false;
adam@1733 50 Demo.noEmacs := false;
adam@1733 51 Settings.setDebug false)
adamc@208 52
adam@1733 53 val () = Compiler.beforeC := MLton.GC.pack
adamc@279 54
adam@1733 55 fun printVersion () = (print (Config.versionString ^ "\n");
adam@1733 56 raise Code OS.Process.success)
adam@1733 57 fun printNumericVersion () = (print (Config.versionNumber ^ "\n");
adam@1733 58 raise Code OS.Process.success)
adam@1733 59
adam@1733 60 fun doArgs args =
adam@1733 61 case args of
adam@1733 62 [] => ()
adam@1733 63 | "-version" :: rest =>
adam@1733 64 printVersion ()
adam@1733 65 | "-numeric-version" :: rest =>
adam@1733 66 printNumericVersion ()
adam@1733 67 | "-css" :: rest =>
adam@1733 68 (css := true;
adam@1733 69 doArgs rest)
adam@1733 70 | "-demo" :: prefix :: rest =>
adam@1733 71 (demo := SOME (prefix, false);
adam@1733 72 doArgs rest)
adam@1733 73 | "-guided-demo" :: prefix :: rest =>
adam@1733 74 (demo := SOME (prefix, true);
adam@1733 75 doArgs rest)
adam@1733 76 | "-tutorial" :: rest =>
adam@1733 77 (tutorial := true;
adam@1733 78 doArgs rest)
adam@1733 79 | "-protocol" :: name :: rest =>
adam@1733 80 (Settings.setProtocol name;
adam@1733 81 doArgs rest)
adam@1733 82 | "-prefix" :: prefix :: rest =>
adam@1733 83 (Settings.setUrlPrefix prefix;
adam@1733 84 doArgs rest)
adam@1733 85 | "-db" :: s :: rest =>
adam@1733 86 (Settings.setDbstring (SOME s);
adam@1733 87 doArgs rest)
adam@1733 88 | "-dbms" :: name :: rest =>
adam@1733 89 (Settings.setDbms name;
adam@1733 90 doArgs rest)
adam@1733 91 | "-debug" :: rest =>
adam@1733 92 (Settings.setDebug true;
adam@1733 93 doArgs rest)
adam@1733 94 | "-verbose" :: rest =>
adam@1733 95 (Compiler.debug := true;
adam@1744 96 Elaborate.verbose := true;
adam@1733 97 doArgs rest)
adam@1733 98 | "-timing" :: rest =>
adam@1733 99 (timing := true;
adam@1733 100 doArgs rest)
adam@1733 101 | "-tc" :: rest =>
adam@1733 102 (tc := true;
adam@1733 103 doArgs rest)
adam@1733 104 | "-dumpTypes" :: rest =>
adam@1733 105 (Elaborate.dumpTypes := true;
adam@1733 106 doArgs rest)
adam@1745 107 | "-dumpTypesOnError" :: rest =>
adam@1745 108 (Elaborate.dumpTypesOnError := true;
adam@1745 109 doArgs rest)
adam@1733 110 | "-unifyMore" :: rest =>
adam@1733 111 (Elaborate.unifyMore := true;
adam@1733 112 doArgs rest)
adam@1733 113 | "-dumpSource" :: rest =>
adam@1733 114 (Compiler.dumpSource := true;
adam@1733 115 doArgs rest)
adam@1733 116 | "-output" :: s :: rest =>
adam@1733 117 (Settings.setExe (SOME s);
adam@1733 118 doArgs rest)
adam@1733 119 | "-sql" :: s :: rest =>
adam@1733 120 (Settings.setSql (SOME s);
adam@1733 121 doArgs rest)
adam@1733 122 | "-static" :: rest =>
adam@1733 123 (Settings.setStaticLinking true;
adam@1733 124 doArgs rest)
adam@1733 125 | "-path" :: name :: path :: rest =>
adam@1733 126 (Compiler.addPath (name, path);
adam@1733 127 doArgs rest)
adam@1733 128 | "-root" :: name :: root :: rest =>
adam@1733 129 (Compiler.addModuleRoot (root, name);
adam@1733 130 doArgs rest)
ezyang@1739 131 | "-boot" :: rest =>
ezyang@1739 132 (Compiler.enableBoot ();
ezyang@1739 133 Settings.setStaticLinking true;
ezyang@1739 134 doArgs rest)
adam@1733 135 | "-sigfile" :: name :: rest =>
adam@1733 136 (Settings.setSigFile (SOME name);
adam@1733 137 doArgs rest)
adam@1733 138 | "-iflow" :: rest =>
adam@1733 139 (Compiler.doIflow := true;
adam@1733 140 doArgs rest)
adam@1733 141 | "-moduleOf" :: fname :: _ =>
adam@1733 142 (print (Compiler.moduleOf fname ^ "\n");
adam@1733 143 raise Code OS.Process.success)
adam@1733 144 | "-noEmacs" :: rest =>
adam@1733 145 (Demo.noEmacs := true;
adam@1733 146 doArgs rest)
adam@1733 147 | "-limit" :: class :: num :: rest =>
adam@1733 148 (case Int.fromString num of
adam@1733 149 NONE => raise Fail ("Invalid limit number '" ^ num ^ "'")
adam@1733 150 | SOME n =>
adam@1733 151 if n < 0 then
adam@1733 152 raise Fail ("Invalid limit number '" ^ num ^ "'")
adam@1733 153 else
adam@1733 154 Settings.addLimit (class, n);
adam@1733 155 doArgs rest)
adam@1733 156 | arg :: rest =>
adam@1733 157 (if size arg > 0 andalso String.sub (arg, 0) = #"-" then
adam@1733 158 raise Fail ("Unknown flag " ^ arg)
adam@1733 159 else
adam@1733 160 sources := arg :: !sources;
adam@1733 161 doArgs rest)
adam@1733 162
adam@1733 163 val () = case args of
adam@1733 164 ["daemon", "stop"] => OS.Process.exit OS.Process.success
adam@1733 165 | _ => ()
adam@1733 166
adam@1733 167 val () = doArgs args
adam@1733 168
adam@1733 169 val job =
adam@1733 170 case !sources of
adam@1733 171 [file] => file
adam@1733 172 | _ => printVersion ()
adam@1733 173 in
adam@1733 174 case (!css, !demo, !tutorial) of
adam@1733 175 (true, _, _) =>
adam@1733 176 (case Compiler.run Compiler.toCss job of
adam@1733 177 NONE => OS.Process.failure
adam@1733 178 | SOME {Overall = ov, Classes = cl} =>
adam@1733 179 (app (print o Css.inheritableToString) ov;
adam@1733 180 print "\n";
adam@1733 181 app (fn (x, (ins, ots)) =>
adam@1733 182 (print x;
adam@1733 183 print " ";
adam@1733 184 app (print o Css.inheritableToString) ins;
adam@1733 185 app (print o Css.othersToString) ots;
adam@1733 186 print "\n")) cl;
adam@1733 187 OS.Process.success))
adam@1733 188 | (_, SOME (prefix, guided), _) =>
adam@1733 189 if Demo.make' {prefix = prefix, dirname = job, guided = guided} then
adam@1733 190 OS.Process.success
adam@1733 191 else
adam@1733 192 OS.Process.failure
adam@1733 193 | (_, _, true) => (Tutorial.make job;
adam@1733 194 OS.Process.success)
adam@1733 195 | _ =>
adam@1733 196 if !tc then
adam@1733 197 (Compiler.check Compiler.toElaborate job;
adam@1733 198 if ErrorMsg.anyErrors () then
adam@1733 199 OS.Process.failure
adam@1733 200 else
adam@1733 201 OS.Process.success)
adam@1733 202 else if !timing then
adam@1733 203 (Compiler.time Compiler.toCjrize job;
adam@1733 204 OS.Process.success)
adam@1733 205 else
adam@1733 206 (if Compiler.compile job then
adam@1733 207 OS.Process.success
adam@1733 208 else
adam@1733 209 OS.Process.failure)
adam@1733 210 end handle Code n => n
adam@1733 211
adam@1733 212 fun send (sock, s) =
adam@1733 213 let
adam@1733 214 val n = Socket.sendVec (sock, Word8VectorSlice.full (Vector.map (Word8.fromInt o ord) s))
adam@1733 215 in
adam@1733 216 if n >= size s then
adam@1733 217 ()
adamc@384 218 else
adam@1733 219 send (sock, String.extract (s, n, NONE))
adam@1733 220 end
adam@1733 221
adam@1733 222 val () = case CommandLine.arguments () of
adam@1733 223 ["daemon", "start"] =>
adam@1733 224 (case Posix.Process.fork () of
adam@1733 225 SOME _ => ()
adam@1733 226 | NONE =>
adam@1733 227 let
adam@1733 228 val () = Elaborate.incremental := true
adam@1733 229 val listen = UnixSock.Strm.socket ()
adam@1733 230
adam@1733 231 fun loop () =
adam@1733 232 let
adam@1733 233 val (sock, _) = Socket.accept listen
adam@1733 234
adam@1733 235 fun loop' (buf, args) =
adam@1733 236 let
adam@1733 237 val s = if CharVector.exists (fn ch => ch = #"\n") buf then
adam@1733 238 ""
adam@1733 239 else
adam@1733 240 Vector.map (chr o Word8.toInt) (Socket.recvVec (sock, 1024))
adam@1733 241 val s = buf ^ s
adam@1733 242 val (befor, after) = Substring.splitl (fn ch => ch <> #"\n") (Substring.full s)
adam@1733 243 in
adam@1733 244 if Substring.isEmpty after then
adam@1733 245 loop' (s, args)
adam@1733 246 else
adam@1733 247 let
adam@1733 248 val cmd = Substring.string befor
adam@1733 249 val rest = Substring.string (Substring.slice (after, 1, NONE))
adam@1733 250 in
adam@1733 251 case cmd of
adam@1744 252 "" =>
adam@1744 253 let
adam@1744 254 val success = (oneRun (rev args))
adam@1744 255 handle ex => (print "unhandled exception:\n";
adam@1744 256 print (General.exnMessage ex ^ "\n");
adam@1744 257 OS.Process.failure)
adam@1744 258 in
adam@1744 259 TextIO.flushOut TextIO.stdOut;
adam@1744 260 TextIO.flushOut TextIO.stdErr;
adam@1744 261 send (sock, if OS.Process.isSuccess success then
adam@1744 262 "\001"
adam@1744 263 else
adam@1744 264 "\002")
adam@1744 265 end
adam@1733 266 | _ => loop' (rest, cmd :: args)
adam@1733 267 end
adam@1733 268 end handle OS.SysErr _ => ()
adam@1744 269
adam@1744 270 fun redirect old =
adam@1744 271 Posix.IO.dup2 {old = valOf (Posix.FileSys.iodToFD (Socket.ioDesc sock)),
adam@1744 272 new = old}
adam@1744 273
adam@1744 274 val oldStdout = Posix.IO.dup Posix.FileSys.stdout
adam@1744 275 val oldStderr = Posix.IO.dup Posix.FileSys.stderr
adam@1733 276 in
adam@1744 277 (* Redirect the daemon's output to the socket. *)
adam@1744 278 redirect Posix.FileSys.stdout;
adam@1744 279 redirect Posix.FileSys.stderr;
adam@1744 280
adam@1733 281 loop' ("", []);
adam@1733 282 Socket.close sock;
adam@1744 283
adam@1744 284 Posix.IO.dup2 {old = oldStdout, new = Posix.FileSys.stdout};
adam@1744 285 Posix.IO.dup2 {old = oldStderr, new = Posix.FileSys.stderr};
adam@1744 286 Posix.IO.close oldStdout;
adam@1744 287 Posix.IO.close oldStderr;
adam@1744 288
adam@1733 289 MLton.GC.pack ();
adam@1733 290 loop ()
adam@1733 291 end
adam@1733 292 in
adam@1733 293 OS.Process.atExit (fn () => OS.FileSys.remove socket);
adam@1733 294 Socket.bind (listen, UnixSock.toAddr socket);
adam@1733 295 Socket.listen (listen, 1);
adam@1733 296 loop ()
adam@1733 297 end)
adam@1733 298
adam@1733 299 | args =>
adam@1733 300 let
adam@1733 301 val sock = UnixSock.Strm.socket ()
adam@1733 302
adam@1733 303 fun wait () =
adam@1733 304 let
adam@1744 305 val v = Socket.recvVec (sock, 1024)
adam@1733 306 in
adam@1733 307 if Vector.length v = 0 then
adam@1733 308 OS.Process.failure
adam@1733 309 else
adam@1744 310 let
adam@1744 311 val s = Vector.map (chr o Word8.toInt) v
adam@1744 312 val last = Vector.sub (v, Vector.length v - 1)
adam@1744 313 val (rc, s) = if last = Word8.fromInt 1 then
adam@1744 314 (SOME OS.Process.success, String.substring (s, 0, size s - 1))
adam@1744 315 else if last = Word8.fromInt 2 then
adam@1744 316 (SOME OS.Process.failure, String.substring (s, 0, size s - 1))
adam@1744 317 else
adam@1744 318 (NONE, s)
adam@1744 319 in
adam@1744 320 print s;
adam@1744 321 case rc of
adam@1744 322 NONE => wait ()
adam@1744 323 | SOME rc => rc
adam@1744 324 end
adam@1733 325 end handle OS.SysErr _ => OS.Process.failure
adam@1733 326 in
adam@1733 327 if Socket.connectNB (sock, UnixSock.toAddr socket)
adam@1733 328 orelse not (List.null (#wrs (Socket.select {rds = [],
adam@1733 329 wrs = [Socket.sockDesc sock],
adam@1733 330 exs = [],
adam@1733 331 timeout = SOME (Time.fromSeconds 1)}))) then
adam@1733 332 (app (fn arg => send (sock, arg ^ "\n")) args;
adam@1733 333 send (sock, "\n");
adam@1733 334 OS.Process.exit (wait ()))
adam@1733 335 else
adam@1733 336 (OS.FileSys.remove socket;
adam@1733 337 raise OS.SysErr ("", NONE))
adam@1733 338 end handle OS.SysErr _ => case args of
adam@1733 339 ["daemon", "stop"] => (OS.FileSys.remove socket handle OS.SysErr _ => ())
adam@1733 340 | _ => OS.Process.exit (oneRun args)