Console.cpp

   1 /* Cycript - Optimizing JavaScript Compiler/Runtime
   2  * Copyright (C) 2009-2012  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU Lesser General Public License, Version 3 {{{ */
   6 /*
   7  * Cycript is free software: you can redistribute it and/or modify it under
   8  * the terms of the GNU Lesser General Public License as published by the
   9  * Free Software Foundation, either version 3 of the License, or (at your
  10  * option) any later version.
  11  *
  12  * Cycript is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
  15  * License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public License
  18  * along with Cycript.  If not, see <http://www.gnu.org/licenses/>.
  19 **/
  20 /* }}} */
  21
  22 #include "cycript.hpp"
  23
  24 #ifdef CY_EXECUTE
  25 #include "JavaScript.hpp"
  26 #endif
  27
  28 #include <cstdio>
  29 #include <sstream>
  30
  31 #include <setjmp.h>
  32
  33 #ifdef HAVE_READLINE_H
  34 #include <readline.h>
  35 #else
  36 #include <readline/readline.h>
  37 #endif
  38
  39 #ifdef HAVE_HISTORY_H
  40 #include <history.h>
  41 #else
  42 #include <readline/history.h>
  43 #endif
  44
  45 #include <sys/mman.h>
  46
  47 #include <errno.h>
  48 #include <unistd.h>
  49
  50 #include <sys/types.h>
  51 #include <sys/stat.h>
  52 #include <fcntl.h>
  53
  54 #include "Cycript.tab.hh"
  55
  56 #include <sys/types.h>
  57 #include <sys/socket.h>
  58 #include <netinet/in.h>
  59 #include <sys/un.h>
  60 #include <pwd.h>
  61
  62 #include <apr_getopt.h>
  63
  64 #include <dlfcn.h>
  65
  66 #include "Replace.hpp"
  67
  68 static volatile enum {
  69     Working,
  70     Parsing,
  71     Running,
  72     Sending,
  73     Waiting,
  74 } mode_;
  75
  76 static jmp_buf ctrlc_;
  77
  78 static void sigint(int) {
  79     switch (mode_) {
  80         case Working:
  81             return;
  82         case Parsing:
  83             longjmp(ctrlc_, 1);
  84         case Running:
  85             throw "*** Ctrl-C";
  86         case Sending:
  87             return;
  88         case Waiting:
  89             return;
  90     }
  91 }
  92
  93 #if YYDEBUG
  94 static bool bison_;
  95 #endif
  96 static bool strict_;
  97 static bool pretty_;
  98
  99 void Setup(CYDriver &driver, cy::parser &parser) {
 100 #if YYDEBUG
 101     if (bison_)
 102         parser.set_debug_level(1);
 103 #endif
 104     if (strict_)
 105         driver.strict_ = true;
 106 }
 107
 108 void Setup(CYOutput &out, CYDriver &driver, CYOptions &options) {
 109     out.pretty_ = pretty_;
 110     CYContext context(options);
 111     driver.program_->Replace(context);
 112 }
 113
 114 static CYUTF8String Run(CYPool &pool, int client, CYUTF8String code) {
 115     const char *json;
 116     size_t size;
 117
 118     if (client == -1) {
 119         mode_ = Running;
 120 #ifdef CY_EXECUTE
 121         json = CYExecute(pool, code);
 122 #else
 123         json = NULL;
 124 #endif
 125         mode_ = Working;
 126         if (json == NULL)
 127             size = 0;
 128         else
 129             size = strlen(json);
 130     } else {
 131         mode_ = Sending;
 132         size = code.size;
 133         CYSendAll(client, &size, sizeof(size));
 134         CYSendAll(client, code.data, code.size);
 135         mode_ = Waiting;
 136         CYRecvAll(client, &size, sizeof(size));
 137         if (size == _not(size_t))
 138             json = NULL;
 139         else {
 140             char *temp(new(pool) char[size + 1]);
 141             CYRecvAll(client, temp, size);
 142             temp[size] = '\0';
 143             json = temp;
 144         }
 145         mode_ = Working;
 146     }
 147
 148     return CYUTF8String(json, size);
 149 }
 150
 151 static CYUTF8String Run(CYPool &pool, int client, const std::string &code) {
 152     return Run(pool, client, CYUTF8String(code.c_str(), code.size()));
 153 }
 154
 155 FILE *fout_;
 156
 157 static void Output(CYUTF8String json, FILE *fout, bool expand = false) {
 158     const char *data(json.data);
 159     size_t size(json.size);
 160
 161     if (data == NULL || fout == NULL)
 162         return;
 163
 164     if (!expand || data[0] != '"' && data[0] != '\'')
 165         fputs(data, fout);
 166     else for (size_t i(0); i != size; ++i)
 167         if (data[i] != '\\')
 168             fputc(data[i], fout);
 169         else switch(data[++i]) {
 170             case '\0': goto done;
 171             case '\\': fputc('\\', fout); break;
 172             case '\'': fputc('\'', fout); break;
 173             case '"': fputc('"', fout); break;
 174             case 'b': fputc('\b', fout); break;
 175             case 'f': fputc('\f', fout); break;
 176             case 'n': fputc('\n', fout); break;
 177             case 'r': fputc('\r', fout); break;
 178             case 't': fputc('\t', fout); break;
 179             case 'v': fputc('\v', fout); break;
 180             default: fputc('\\', fout); --i; break;
 181         }
 182
 183   done:
 184     fputs("\n", fout);
 185     fflush(fout);
 186 }
 187
 188 static void Run(int client, const char *data, size_t size, FILE *fout = NULL, bool expand = false) {
 189     CYPool pool;
 190     Output(Run(pool, client, CYUTF8String(data, size)), fout, expand);
 191 }
 192
 193 static void Run(int client, std::string &code, FILE *fout = NULL, bool expand = false) {
 194     Run(client, code.c_str(), code.size(), fout, expand);
 195 }
 196
 197 int (*append_history$)(int, const char *);
 198
 199 static std::string command_;
 200
 201 static CYExpression *ParseExpression(CYUTF8String code) {
 202     std::ostringstream str;
 203     str << '(' << code << ')';
 204     std::string string(str.str());
 205
 206     CYDriver driver;
 207     driver.data_ = string.c_str();
 208     driver.size_ = string.size();
 209
 210     cy::parser parser(driver);
 211     Setup(driver, parser);
 212
 213     if (parser.parse() != 0 || !driver.errors_.empty())
 214         return NULL;
 215
 216     CYOptions options;
 217     CYContext context(options);
 218
 219     // XXX: this could be replaced with a CYStatement::Primitive()
 220     if (CYExpress *express = dynamic_cast<CYExpress *>(driver.program_->statements_))
 221         return express->expression_->Primitive(context);
 222
 223     return NULL;
 224 }
 225
 226 static int client_;
 227
 228 static char **Complete(const char *word, int start, int end) {
 229     rl_attempted_completion_over = TRUE;
 230
 231     CYLocalPool pool;
 232     CYDriver driver;
 233     cy::parser parser(driver);
 234     Setup(driver, parser);
 235
 236     std::string line(rl_line_buffer, start);
 237     std::string command(command_ + line);
 238
 239     driver.data_ = command.c_str();
 240     driver.size_ = command.size();
 241
 242     driver.auto_ = true;
 243
 244     if (parser.parse() != 0 || !driver.errors_.empty())
 245         return NULL;
 246
 247     if (driver.mode_ == CYDriver::AutoNone)
 248         return NULL;
 249
 250     CYExpression *expression;
 251
 252     CYOptions options;
 253     CYContext context(options);
 254
 255     std::ostringstream prefix;
 256
 257     switch (driver.mode_) {
 258         case CYDriver::AutoPrimary:
 259             expression = $ CYThis();
 260         break;
 261
 262         case CYDriver::AutoDirect:
 263             expression = driver.context_;
 264         break;
 265
 266         case CYDriver::AutoIndirect:
 267             expression = $ CYIndirect(driver.context_);
 268         break;
 269
 270         case CYDriver::AutoMessage: {
 271             CYDriver::Context &thing(driver.contexts_.back());
 272             expression = $M($C1($V("object_getClass"), thing.context_), $S("messages"));
 273             for (CYDriver::Context::Words::const_iterator part(thing.words_.begin()); part != thing.words_.end(); ++part)
 274                 prefix << (*part)->word_ << ':';
 275         } break;
 276
 277         default:
 278             _assert(false);
 279     }
 280
 281     std::string begin(prefix.str());
 282
 283     driver.program_ = $ CYProgram($ CYExpress($C3(ParseExpression(
 284     "   function(object, prefix, word) {\n"
 285     "       var names = [];\n"
 286     "       var before = prefix.length;\n"
 287     "       prefix += word;\n"
 288     "       var entire = prefix.length;\n"
 289     "       for (name in object)\n"
 290     "           if (name.substring(0, entire) == prefix)\n"
 291     "               names.push(name.substr(before));\n"
 292     "       return names;\n"
 293     "   }\n"
 294     ), expression, $S(begin.c_str()), $S(word))));
 295
 296     driver.program_->Replace(context);
 297
 298     std::ostringstream str;
 299     CYOutput out(str, options);
 300     out << *driver.program_;
 301
 302     std::string code(str.str());
 303     CYUTF8String json(Run(pool, client_, code));
 304
 305     CYExpression *result(ParseExpression(json));
 306     if (result == NULL)
 307         return NULL;
 308
 309     CYArray *array(dynamic_cast<CYArray *>(result));
 310
 311     if (array == NULL) {
 312         fprintf(fout_, "\n");
 313         Output(json, fout_);
 314         rl_forced_update_display();
 315         return NULL;
 316     }
 317
 318     // XXX: use an std::set?
 319     typedef std::vector<std::string> Completions;
 320     Completions completions;
 321
 322     std::string common;
 323     bool rest(false);
 324
 325     CYForEach (element, array->elements_) {
 326         CYString *string(dynamic_cast<CYString *>(element->value_));
 327         _assert(string != NULL);
 328
 329         std::string completion;
 330         if (string->size_ != 0)
 331             completion.assign(string->value_, string->size_);
 332         else if (driver.mode_ == CYDriver::AutoMessage)
 333             completion = "]";
 334         else
 335             continue;
 336
 337         completions.push_back(completion);
 338
 339         if (!rest) {
 340             common = completion;
 341             rest = true;
 342         } else {
 343             size_t limit(completion.size()), size(common.size());
 344             if (size > limit)
 345                 common = common.substr(0, limit);
 346             else
 347                 limit = size;
 348             for (limit = 0; limit != size; ++limit)
 349                 if (common[limit] != completion[limit])
 350                     break;
 351             if (limit != size)
 352                 common = common.substr(0, limit);
 353         }
 354     }
 355
 356     size_t count(completions.size());
 357     if (count == 0)
 358         return NULL;
 359
 360     size_t colon(common.find(':'));
 361     if (colon != std::string::npos)
 362         common = common.substr(0, colon + 1);
 363     if (completions.size() == 1)
 364         common += ' ';
 365
 366     char **results(reinterpret_cast<char **>(malloc(sizeof(char *) * (count + 2))));
 367
 368     results[0] = strdup(common.c_str());
 369     size_t index(0);
 370     for (Completions::const_iterator i(completions.begin()); i != completions.end(); ++i)
 371         results[++index] = strdup(i->c_str());
 372     results[count + 1] = NULL;
 373
 374     return results;
 375 }
 376
 377 // need char *, not const char *
 378 static char name_[] = "cycript";
 379 static char break_[] = " \t\n\"\\'`@$><=;|&{(" ")}" ".:[]";
 380
 381 static void Console(CYOptions &options) {
 382     CYPool pool;
 383
 384     passwd *passwd;
 385     if (const char *username = getenv("LOGNAME"))
 386         passwd = getpwnam(username);
 387     else
 388         passwd = getpwuid(getuid());
 389
 390     const char *basedir(apr_psprintf(pool, "%s/.cycript", passwd->pw_dir));
 391     const char *histfile(apr_psprintf(pool, "%s/history", basedir));
 392     size_t histlines(0);
 393
 394     rl_initialize();
 395     rl_readline_name = name_;
 396
 397     mkdir(basedir, 0700);
 398     read_history(histfile);
 399
 400     bool bypass(false);
 401     bool debug(false);
 402     bool expand(false);
 403
 404     fout_ = stdout;
 405
 406     // rl_completer_word_break_characters is broken in libedit
 407     rl_basic_word_break_characters = break_;
 408
 409     rl_completer_word_break_characters = break_;
 410     rl_attempted_completion_function = &Complete;
 411     rl_bind_key('\t', rl_complete);
 412
 413     struct sigaction action;
 414     sigemptyset(&action.sa_mask);
 415     action.sa_handler = &sigint;
 416     action.sa_flags = 0;
 417     sigaction(SIGINT, &action, NULL);
 418
 419     restart: for (;;) {
 420         command_.clear();
 421         std::vector<std::string> lines;
 422
 423         bool extra(false);
 424         const char *prompt("cy# ");
 425
 426         if (setjmp(ctrlc_) != 0) {
 427             mode_ = Working;
 428             fputs("\n", fout_);
 429             fflush(fout_);
 430             goto restart;
 431         }
 432
 433       read:
 434         mode_ = Parsing;
 435         char *line(readline(prompt));
 436         mode_ = Working;
 437         if (line == NULL)
 438             break;
 439         if (line[0] == '\0')
 440             goto read;
 441
 442         if (!extra) {
 443             extra = true;
 444             if (line[0] == '?') {
 445                 std::string data(line + 1);
 446                 if (data == "bypass") {
 447                     bypass = !bypass;
 448                     fprintf(fout_, "bypass == %s\n", bypass ? "true" : "false");
 449                     fflush(fout_);
 450                 } else if (data == "debug") {
 451                     debug = !debug;
 452                     fprintf(fout_, "debug == %s\n", debug ? "true" : "false");
 453                     fflush(fout_);
 454                 } else if (data == "expand") {
 455                     expand = !expand;
 456                     fprintf(fout_, "expand == %s\n", expand ? "true" : "false");
 457                     fflush(fout_);
 458                 }
 459                 add_history(line);
 460                 ++histlines;
 461                 goto restart;
 462             }
 463         }
 464
 465         command_ += line;
 466
 467         char *begin(line), *end(line + strlen(line));
 468         while (char *nl = reinterpret_cast<char *>(memchr(begin, '\n', end - begin))) {
 469             *nl = '\0';
 470             lines.push_back(begin);
 471             begin = nl + 1;
 472         }
 473
 474         lines.push_back(begin);
 475
 476         free(line);
 477
 478         std::string code;
 479
 480         if (bypass)
 481             code = command_;
 482         else {
 483             CYLocalPool pool;
 484             CYDriver driver;
 485             cy::parser parser(driver);
 486             Setup(driver, parser);
 487
 488             driver.data_ = command_.c_str();
 489             driver.size_ = command_.size();
 490
 491             if (parser.parse() != 0 || !driver.errors_.empty()) {
 492                 for (CYDriver::Errors::const_iterator error(driver.errors_.begin()); error != driver.errors_.end(); ++error) {
 493                     cy::position begin(error->location_.begin);
 494                     if (begin.line != lines.size() || begin.column < lines.back().size() || error->warning_) {
 495                         cy::position end(error->location_.end);
 496
 497                         if (begin.line != lines.size()) {
 498                             std::cerr << "  | ";
 499                             std::cerr << lines[begin.line - 1] << std::endl;
 500                         }
 501
 502                         std::cerr << "....";
 503                         for (size_t i(0); i != begin.column; ++i)
 504                             std::cerr << '.';
 505                         if (begin.line != end.line || begin.column == end.column)
 506                             std::cerr << '^';
 507                         else for (size_t i(0), e(end.column - begin.column); i != e; ++i)
 508                             std::cerr << '^';
 509                         std::cerr << std::endl;
 510
 511                         std::cerr << "  | ";
 512                         std::cerr << error->message_ << std::endl;
 513
 514                         add_history(command_.c_str());
 515                         ++histlines;
 516                         goto restart;
 517                     }
 518                 }
 519
 520                 driver.errors_.clear();
 521
 522                 command_ += '\n';
 523                 prompt = "cy> ";
 524                 goto read;
 525             }
 526
 527             if (driver.program_ == NULL)
 528                 goto restart;
 529
 530             if (client_ != -1)
 531                 code = command_;
 532             else {
 533                 std::ostringstream str;
 534                 CYOutput out(str, options);
 535                 Setup(out, driver, options);
 536                 out << *driver.program_;
 537                 code = str.str();
 538             }
 539         }
 540
 541         add_history(command_.c_str());
 542         ++histlines;
 543
 544         if (debug)
 545             std::cout << code << std::endl;
 546
 547         Run(client_, code, fout_, expand);
 548     }
 549
 550     if (append_history$ != NULL) {
 551         _syscall(close(_syscall(open(histfile, O_CREAT | O_WRONLY, 0600))));
 552         (*append_history$)(histlines, histfile);
 553     } else {
 554         write_history(histfile);
 555     }
 556
 557     fputs("\n", fout_);
 558     fflush(fout_);
 559 }
 560
 561 static void *Map(const char *path, size_t *psize) {
 562     int fd;
 563     _syscall(fd = open(path, O_RDONLY));
 564
 565     struct stat stat;
 566     _syscall(fstat(fd, &stat));
 567     size_t size(stat.st_size);
 568
 569     *psize = size;
 570
 571     void *base;
 572     _syscall(base = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0));
 573
 574     _syscall(close(fd));
 575     return base;
 576 }
 577
 578 void InjectLibrary(pid_t pid);
 579
 580 int Main(int argc, char const * const argv[], char const * const envp[]) {
 581     bool tty(isatty(STDIN_FILENO));
 582     bool compile(false);
 583     CYOptions options;
 584
 585     append_history$ = (int (*)(int, const char *)) (dlsym(RTLD_DEFAULT, "append_history"));
 586
 587 #ifdef CY_ATTACH
 588     pid_t pid(_not(pid_t));
 589 #endif
 590
 591     CYPool pool;
 592     apr_getopt_t *state;
 593     _aprcall(apr_getopt_init(&state, pool, argc, argv));
 594
 595     for (;;) {
 596         char opt;
 597         const char *arg;
 598
 599         apr_status_t status(apr_getopt(state,
 600             "cg:n:"
 601 #ifdef CY_ATTACH
 602             "p:"
 603 #endif
 604             "s"
 605         , &opt, &arg));
 606
 607         switch (status) {
 608             case APR_EOF:
 609                 goto getopt;
 610             case APR_BADCH:
 611             case APR_BADARG:
 612                 fprintf(stderr,
 613                     "usage: cycript [-c]"
 614 #ifdef CY_ATTACH
 615                     " [-p <pid|name>]"
 616 #endif
 617                     " [<script> [<arg>...]]\n"
 618                 );
 619                 return 1;
 620             default:
 621                 _aprcall(status);
 622         }
 623
 624         switch (opt) {
 625             case 'c':
 626                 compile = true;
 627             break;
 628
 629             case 'g':
 630                 if (false);
 631                 else if (strcmp(arg, "rename") == 0)
 632                     options.verbose_ = true;
 633 #if YYDEBUG
 634                 else if (strcmp(arg, "bison") == 0)
 635                     bison_ = true;
 636 #endif
 637                 else {
 638                     fprintf(stderr, "invalid name for -g\n");
 639                     return 1;
 640                 }
 641             break;
 642
 643             case 'n':
 644                 if (false);
 645                 else if (strcmp(arg, "minify") == 0)
 646                     pretty_ = true;
 647                 else {
 648                     fprintf(stderr, "invalid name for -n\n");
 649                     return 1;
 650                 }
 651             break;
 652
 653 #ifdef CY_ATTACH
 654             case 'p': {
 655                 size_t size(strlen(arg));
 656                 char *end;
 657
 658                 pid = strtoul(arg, &end, 0);
 659                 if (arg + size != end) {
 660                     // XXX: arg needs to be escaped in some horrendous way of doom
 661                     const char *command(apr_psprintf(pool, "ps axc|sed -e '/^ *[0-9]/{s/^ *\\([0-9]*\\)\\( *[^ ]*\\)\\{3\\} *-*\\([^ ]*\\)/\\3 \\1/;/^%s /{s/^[^ ]* //;q;};};d'", arg));
 662
 663                     if (FILE *pids = popen(command, "r")) {
 664                         char value[32];
 665                         size = 0;
 666
 667                         for (;;) {
 668                             size_t read(fread(value + size, 1, sizeof(value) - size, pids));
 669                             if (read == 0)
 670                                 break;
 671                             else {
 672                                 size += read;
 673                                 if (size == sizeof(value)) {
 674                                     pid = _not(pid_t);
 675                                     goto fail;
 676                                 }
 677                             }
 678                         }
 679
 680                       size:
 681                         if (size == 0)
 682                             goto fail;
 683                         if (value[size - 1] == '\n') {
 684                             --size;
 685                             goto size;
 686                         }
 687
 688                         value[size] = '\0';
 689                         size = strlen(value);
 690                         pid = strtoul(value, &end, 0);
 691                         if (value + size != end) fail:
 692                             pid = _not(pid_t);
 693                         _syscall(pclose(pids));
 694                     }
 695
 696                     if (pid == _not(pid_t)) {
 697                         fprintf(stderr, "invalid pid for -p\n");
 698                         return 1;
 699                     }
 700                 }
 701             } break;
 702 #endif
 703
 704             case 's':
 705                 strict_ = true;
 706             break;
 707         }
 708     } getopt:;
 709
 710     const char *script;
 711     int ind(state->ind);
 712
 713 #ifdef CY_ATTACH
 714     if (pid != _not(pid_t) && ind < argc - 1) {
 715         fprintf(stderr, "-p cannot set argv\n");
 716         return 1;
 717     }
 718
 719     if (pid != _not(pid_t) && compile) {
 720         fprintf(stderr, "-p conflicts with -c\n");
 721         return 1;
 722     }
 723 #endif
 724
 725     if (ind == argc)
 726         script = NULL;
 727     else {
 728 #ifdef CY_EXECUTE
 729         // XXX: const_cast?! wtf gcc :(
 730         CYSetArgs(argc - ind - 1, const_cast<const char **>(argv + ind + 1));
 731 #endif
 732         script = argv[ind];
 733         if (strcmp(script, "-") == 0)
 734             script = NULL;
 735     }
 736
 737 #ifdef CY_ATTACH
 738     if (pid != _not(pid_t) && script == NULL && !tty) {
 739         fprintf(stderr, "non-terminal attaching to remote console\n");
 740         return 1;
 741     }
 742 #endif
 743
 744 #ifdef CY_ATTACH
 745     if (pid == _not(pid_t))
 746         client_ = -1;
 747     else {
 748         int server(_syscall(socket(PF_UNIX, SOCK_STREAM, 0))); try {
 749             struct sockaddr_un address;
 750             memset(&address, 0, sizeof(address));
 751             address.sun_family = AF_UNIX;
 752
 753             sprintf(address.sun_path, "/tmp/.s.cy.%u", getpid());
 754
 755             _syscall(bind(server, reinterpret_cast<sockaddr *>(&address), SUN_LEN(&address)));
 756             _syscall(chmod(address.sun_path, 0777));
 757
 758             try {
 759                 _syscall(listen(server, 1));
 760                 InjectLibrary(pid);
 761                 client_ = _syscall(accept(server, NULL, NULL));
 762             } catch (...) {
 763                 // XXX: exception?
 764                 unlink(address.sun_path);
 765                 throw;
 766             }
 767         } catch (...) {
 768             _syscall(close(server));
 769             throw;
 770         }
 771     }
 772 #else
 773     client_ = -1;
 774 #endif
 775
 776     if (script == NULL && tty)
 777         Console(options);
 778     else {
 779         CYLocalPool pool;
 780         CYDriver driver(script ?: "<stdin>");
 781         cy::parser parser(driver);
 782         Setup(driver, parser);
 783
 784         char *start, *end;
 785
 786         if (script == NULL) {
 787             start = NULL;
 788             end = NULL;
 789
 790             driver.file_ = stdin;
 791         } else {
 792             size_t size;
 793             start = reinterpret_cast<char *>(Map(script, &size));
 794             end = start + size;
 795
 796             if (size >= 2 && start[0] == '#' && start[1] == '!') {
 797                 start += 2;
 798
 799                 if (void *line = memchr(start, '\n', end - start))
 800                     start = reinterpret_cast<char *>(line);
 801                 else
 802                     start = end;
 803             }
 804
 805             driver.data_ = start;
 806             driver.size_ = end - start;
 807         }
 808
 809         if (parser.parse() != 0 || !driver.errors_.empty()) {
 810             for (CYDriver::Errors::const_iterator i(driver.errors_.begin()); i != driver.errors_.end(); ++i)
 811                 std::cerr << i->location_.begin << ": " << i->message_ << std::endl;
 812         } else if (driver.program_ != NULL)
 813             if (client_ != -1) {
 814                 std::string code(start, end-start);
 815                 Run(client_, code, stdout);
 816             } else {
 817                 std::ostringstream str;
 818                 CYOutput out(str, options);
 819                 Setup(out, driver, options);
 820                 out << *driver.program_;
 821                 std::string code(str.str());
 822                 if (compile)
 823                     std::cout << code;
 824                 else
 825                     Run(client_, code, stdout);
 826             }
 827     }
 828
 829     return 0;
 830 }
 831
 832 int main(int argc, char const * const argv[], char const * const envp[]) {
 833     apr_status_t status(apr_app_initialize(&argc, &argv, &envp));
 834
 835     if (status != APR_SUCCESS) {
 836         fprintf(stderr, "apr_app_initialize() != APR_SUCCESS\n");
 837         return 1;
 838     } else try {
 839         return Main(argc, argv, envp);
 840     } catch (const CYException &error) {
 841         CYPool pool;
 842         fprintf(stderr, "%s\n", error.PoolCString(pool));
 843         return 1;
 844     }
 845 }