Console.cpp

   1 /* Cycript - Inlining/Optimizing JavaScript Compiler
   2  * Copyright (C) 2009  Jay Freeman (saurik)
   3 */
   4
   5 /* Modified BSD License {{{ */
   6 /*
   7  *        Redistribution and use in source and binary
   8  * forms, with or without modification, are permitted
   9  * provided that the following conditions are met:
  10  *
  11  * 1. Redistributions of source code must retain the
  12  *    above copyright notice, this list of conditions
  13  *    and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the
  15  *    above copyright notice, this list of conditions
  16  *    and the following disclaimer in the documentation
  17  *    and/or other materials provided with the
  18  *    distribution.
  19  * 3. The name of the author may not be used to endorse
  20  *    or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS''
  24  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
  25  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  26  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
  28  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  29  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  30  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  31  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  34  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  35  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  36  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  37 */
  38 /* }}} */
  39
  40 #include "cycript.hpp"
  41
  42 #ifdef CY_EXECUTE
  43 #include "JavaScript.hpp"
  44 #endif
  45
  46 #include <cstdio>
  47 #include <sstream>
  48
  49 #include <setjmp.h>
  50
  51 #ifdef HAVE_READLINE_H
  52 #include <readline.h>
  53 #else
  54 #include <readline/readline.h>
  55 #endif
  56
  57 #ifdef HAVE_HISTORY_H
  58 #include <history.h>
  59 #else
  60 #include <readline/history.h>
  61 #endif
  62
  63 #include <sys/mman.h>
  64
  65 #include <errno.h>
  66 #include <unistd.h>
  67
  68 #include <sys/types.h>
  69 #include <sys/stat.h>
  70 #include <fcntl.h>
  71
  72 #include "Cycript.tab.hh"
  73
  74 #include <sys/types.h>
  75 #include <sys/socket.h>
  76 #include <netinet/in.h>
  77 #include <sys/un.h>
  78 #include <pwd.h>
  79
  80 #include <apr_getopt.h>
  81
  82 #include <dlfcn.h>
  83
  84 #include "Replace.hpp"
  85
  86 static volatile enum {
  87     Working,
  88     Parsing,
  89     Running,
  90     Sending,
  91     Waiting,
  92 } mode_;
  93
  94 static jmp_buf ctrlc_;
  95
  96 static void sigint(int) {
  97     switch (mode_) {
  98         case Working:
  99             return;
 100         case Parsing:
 101             longjmp(ctrlc_, 1);
 102         case Running:
 103             throw "*** Ctrl-C";
 104         case Sending:
 105             return;
 106         case Waiting:
 107             return;
 108     }
 109 }
 110
 111 #if YYDEBUG
 112 static bool bison_;
 113 #endif
 114 static bool strict_;
 115 static bool pretty_;
 116
 117 void Setup(CYDriver &driver, cy::parser &parser) {
 118 #if YYDEBUG
 119     if (bison_)
 120         parser.set_debug_level(1);
 121 #endif
 122     if (strict_)
 123         driver.strict_ = true;
 124 }
 125
 126 void Setup(CYOutput &out, CYDriver &driver, CYOptions &options) {
 127     out.pretty_ = pretty_;
 128     CYContext context(driver.pool_, options);
 129     driver.program_->Replace(context);
 130 }
 131
 132 static CYUTF8String Run(CYPool &pool, int client, CYUTF8String code) {
 133     const char *json;
 134     size_t size;
 135
 136     if (client == -1) {
 137         mode_ = Running;
 138 #ifdef CY_EXECUTE
 139         json = CYExecute(pool, code.data);
 140 #else
 141         json = NULL;
 142 #endif
 143         mode_ = Working;
 144         if (json != NULL)
 145             size = strlen(json);
 146     } else {
 147         mode_ = Sending;
 148         CYSendAll(client, &size, sizeof(size));
 149         CYSendAll(client, code.data, size);
 150         mode_ = Waiting;
 151         CYRecvAll(client, &size, sizeof(size));
 152         if (size == _not(size_t))
 153             json = NULL;
 154         else {
 155             char *temp(new(pool) char[size + 1]);
 156             CYRecvAll(client, temp, size);
 157             temp[size] = '\0';
 158             json = temp;
 159         }
 160         mode_ = Working;
 161     }
 162
 163     return CYUTF8String(json, size);
 164 }
 165
 166 static CYUTF8String Run(CYPool &pool, int client, const std::string &code) {
 167     return Run(pool, client, CYUTF8String(code.c_str(), code.size()));
 168 }
 169
 170 void Run(int client, const char *data, size_t size, FILE *fout = NULL, bool expand = false) {
 171     CYPool pool;
 172     CYUTF8String json(Run(pool, client, CYUTF8String(data, size)));
 173
 174     data = json.data;
 175     size = json.size;
 176
 177     if (data != NULL && fout != NULL) {
 178         if (!expand || data[0] != '"' && data[0] != '\'')
 179             fputs(data, fout);
 180         else for (size_t i(0); i != size; ++i)
 181             if (data[i] != '\\')
 182                 fputc(data[i], fout);
 183             else switch(data[++i]) {
 184                 case '\0': goto done;
 185                 case '\\': fputc('\\', fout); break;
 186                 case '\'': fputc('\'', fout); break;
 187                 case '"': fputc('"', fout); break;
 188                 case 'b': fputc('\b', fout); break;
 189                 case 'f': fputc('\f', fout); break;
 190                 case 'n': fputc('\n', fout); break;
 191                 case 'r': fputc('\r', fout); break;
 192                 case 't': fputc('\t', fout); break;
 193                 case 'v': fputc('\v', fout); break;
 194                 default: fputc('\\', fout); --i; break;
 195             }
 196
 197       done:
 198         fputs("\n", fout);
 199         fflush(fout);
 200     }
 201 }
 202
 203 static void Run(int client, std::string &code, FILE *fout = NULL, bool expand = false) {
 204     Run(client, code.c_str(), code.size(), fout, expand);
 205 }
 206
 207 int (*append_history$)(int, const char *);
 208
 209 static std::string command_;
 210
 211 static CYExpression *ParseExpression(CYPool &pool, CYUTF8String code) {
 212     std::ostringstream str;
 213     str << '(' << code << ')';
 214     std::string string(str.str());
 215
 216     CYDriver driver(pool);
 217     driver.data_ = string.c_str();
 218     driver.size_ = string.size();
 219
 220     cy::parser parser(driver);
 221     Setup(driver, parser);
 222
 223     if (parser.parse() != 0 || !driver.errors_.empty())
 224         _assert(false);
 225
 226     CYExpress *express(dynamic_cast<CYExpress *>(driver.program_->statements_));
 227     _assert(express != NULL);
 228     return express->expression_;
 229 }
 230
 231 static int client_;
 232
 233 static char **Complete(const char *word, int start, int end) {
 234     rl_attempted_completion_over = TRUE;
 235
 236     CYPool pool;
 237
 238     CYDriver driver(pool);
 239     cy::parser parser(driver);
 240     Setup(driver, parser);
 241
 242     std::string line(rl_line_buffer, start);
 243     std::string command(command_ + line);
 244
 245     driver.data_ = command.c_str();
 246     driver.size_ = command.size();
 247
 248     driver.auto_ = true;
 249
 250     if (parser.parse() != 0 || !driver.errors_.empty())
 251         return NULL;
 252
 253     if (driver.mode_ == CYDriver::AutoNone)
 254         return NULL;
 255
 256     CYExpression *expression;
 257
 258     CYOptions options;
 259     CYContext context(driver.pool_, options);
 260
 261     std::ostringstream prefix;
 262
 263     switch (driver.mode_) {
 264         case CYDriver::AutoPrimary:
 265             expression = $ CYThis();
 266         break;
 267
 268         case CYDriver::AutoDirect:
 269             expression = driver.context_;
 270         break;
 271
 272         case CYDriver::AutoIndirect:
 273             expression = $ CYIndirect(driver.context_);
 274         break;
 275
 276         case CYDriver::AutoMessage: {
 277             CYDriver::Context &thing(driver.contexts_.back());
 278             expression = $M($M($ CYIndirect(thing.context_), $S("isa")), $S("messages"));
 279             for (CYDriver::Context::Words::const_iterator part(thing.words_.begin()); part != thing.words_.end(); ++part)
 280                 prefix << (*part)->word_ << ':';
 281         } break;
 282
 283         default:
 284             _assert(false);
 285     }
 286
 287     std::string begin(prefix.str() + word);
 288
 289     driver.program_ = $ CYProgram($ CYExpress($C2(ParseExpression(pool,
 290     "   function(object, prefix) {\n"
 291     "       var names = [];\n"
 292     "       var pattern = '^' + prefix;\n"
 293     "       for (name in object)\n"
 294     "           if (name.match(pattern) != null)\n"
 295     "               names.push(name);\n"
 296     "       return names;\n"
 297     "   }\n"
 298     ), expression, $S(begin.c_str()))));
 299
 300     driver.program_->Replace(context);
 301
 302     std::ostringstream str;
 303     CYOutput out(str, options);
 304     out << *driver.program_;
 305
 306     std::string code(str.str());
 307     CYUTF8String json(Run(pool, client_, code));
 308
 309     CYExpression *result(ParseExpression(pool, json));
 310     CYArray *array(dynamic_cast<CYArray *>(result));
 311     _assert(array != NULL);
 312
 313     // XXX: use an std::set?
 314     typedef std::vector<std::string> Completions;
 315     Completions completions;
 316
 317     std::string common;
 318     bool rest(false);
 319
 320     for (CYElement *element(array->elements_); element != NULL; element = element->next_) {
 321         CYString *string(dynamic_cast<CYString *>(element->value_));
 322         _assert(string != NULL);
 323
 324         std::string completion(string->value_, string->size_);
 325         completions.push_back(completion);
 326
 327         if (!rest) {
 328             common = completion;
 329             rest = true;
 330         } else {
 331             size_t limit(completion.size()), size(common.size());
 332             if (size > limit)
 333                 common = common.substr(0, limit);
 334             else
 335                 limit = size;
 336             for (limit = 0; limit != size; ++limit)
 337                 if (common[limit] != completion[limit])
 338                     break;
 339             if (limit != size)
 340                 common = common.substr(0, limit);
 341         }
 342     }
 343
 344     size_t count(completions.size());
 345     if (count == 0)
 346         return NULL;
 347
 348     if (!common.empty()) {
 349         size_t size(prefix.str().size());
 350         _assert(common.size() >= size);
 351         common = common.substr(size);
 352     }
 353
 354     size_t colon(common.find(':'));
 355     if (colon != std::string::npos)
 356         common = common.substr(0, colon + 1);
 357
 358     char **results(reinterpret_cast<char **>(malloc(sizeof(char *) * (count + 2))));
 359
 360     results[0] = strdup(common.c_str());
 361     size_t index(0);
 362     for (Completions::const_iterator i(completions.begin()); i != completions.end(); ++i)
 363         results[++index] = strdup(i->c_str());
 364     results[count + 1] = NULL;
 365
 366     return results;
 367 }
 368
 369 // need char *, not const char *
 370 static char name_[] = "cycript";
 371 static char break_[] = " \t\n\"\\'`@$><=;|&{(" ".:";
 372
 373 static void Console(apr_pool_t *pool, CYOptions &options) {
 374     passwd *passwd;
 375     if (const char *username = getenv("LOGNAME"))
 376         passwd = getpwnam(username);
 377     else
 378         passwd = getpwuid(getuid());
 379
 380     const char *basedir(apr_psprintf(pool, "%s/.cycript", passwd->pw_dir));
 381     const char *histfile(apr_psprintf(pool, "%s/history", basedir));
 382     size_t histlines(0);
 383
 384     rl_initialize();
 385     rl_readline_name = name_;
 386
 387     mkdir(basedir, 0700);
 388     read_history(histfile);
 389
 390     bool bypass(false);
 391     bool debug(false);
 392     bool expand(false);
 393
 394     FILE *fout(stdout);
 395
 396     // rl_completer_word_break_characters is broken in libedit
 397     rl_basic_word_break_characters = break_;
 398
 399     rl_completer_word_break_characters = break_;
 400     rl_attempted_completion_function = &Complete;
 401     rl_bind_key('\t', rl_complete);
 402
 403     struct sigaction action;
 404     sigemptyset(&action.sa_mask);
 405     action.sa_handler = &sigint;
 406     action.sa_flags = 0;
 407     sigaction(SIGINT, &action, NULL);
 408
 409     restart: for (;;) {
 410         command_.clear();
 411         std::vector<std::string> lines;
 412
 413         bool extra(false);
 414         const char *prompt("cy# ");
 415
 416         if (setjmp(ctrlc_) != 0) {
 417             mode_ = Working;
 418             fputs("\n", fout);
 419             fflush(fout);
 420             goto restart;
 421         }
 422
 423       read:
 424         mode_ = Parsing;
 425         char *line(readline(prompt));
 426         mode_ = Working;
 427         if (line == NULL)
 428             break;
 429         if (line[0] == '\0')
 430             goto read;
 431
 432         if (!extra) {
 433             extra = true;
 434             if (line[0] == '?') {
 435                 std::string data(line + 1);
 436                 if (data == "bypass") {
 437                     bypass = !bypass;
 438                     fprintf(fout, "bypass == %s\n", bypass ? "true" : "false");
 439                     fflush(fout);
 440                 } else if (data == "debug") {
 441                     debug = !debug;
 442                     fprintf(fout, "debug == %s\n", debug ? "true" : "false");
 443                     fflush(fout);
 444                 } else if (data == "expand") {
 445                     expand = !expand;
 446                     fprintf(fout, "expand == %s\n", expand ? "true" : "false");
 447                     fflush(fout);
 448                 }
 449                 add_history(line);
 450                 ++histlines;
 451                 goto restart;
 452             }
 453         }
 454
 455         command_ += line;
 456
 457         char *begin(line), *end(line + strlen(line));
 458         while (char *nl = reinterpret_cast<char *>(memchr(begin, '\n', end - begin))) {
 459             *nl = '\0';
 460             lines.push_back(begin);
 461             begin = nl + 1;
 462         }
 463
 464         lines.push_back(begin);
 465
 466         free(line);
 467
 468         std::string code;
 469
 470         if (bypass)
 471             code = command_;
 472         else {
 473             CYDriver driver;
 474             cy::parser parser(driver);
 475             Setup(driver, parser);
 476
 477             driver.data_ = command_.c_str();
 478             driver.size_ = command_.size();
 479
 480             if (parser.parse() != 0 || !driver.errors_.empty()) {
 481                 for (CYDriver::Errors::const_iterator error(driver.errors_.begin()); error != driver.errors_.end(); ++error) {
 482                     cy::position begin(error->location_.begin);
 483                     if (begin.line != lines.size() || begin.column - 1 != lines.back().size() || error->warning_) {
 484                         cy::position end(error->location_.end);
 485
 486                         if (begin.line != lines.size()) {
 487                             std::cerr << "  | ";
 488                             std::cerr << lines[begin.line - 1] << std::endl;
 489                         }
 490
 491                         std::cerr << "....";
 492                         for (size_t i(0); i != begin.column - 1; ++i)
 493                             std::cerr << '.';
 494                         if (begin.line != end.line || begin.column == end.column)
 495                             std::cerr << '^';
 496                         else for (size_t i(0), e(end.column - begin.column); i != e; ++i)
 497                             std::cerr << '^';
 498                         std::cerr << std::endl;
 499
 500                         std::cerr << "  | ";
 501                         std::cerr << error->message_ << std::endl;
 502
 503                         add_history(command_.c_str());
 504                         ++histlines;
 505                         goto restart;
 506                     }
 507                 }
 508
 509                 driver.errors_.clear();
 510
 511                 command_ += '\n';
 512                 prompt = "cy> ";
 513                 goto read;
 514             }
 515
 516             if (driver.program_ == NULL)
 517                 goto restart;
 518
 519             if (client_ != -1)
 520                 code = command_;
 521             else {
 522                 std::ostringstream str;
 523                 CYOutput out(str, options);
 524                 Setup(out, driver, options);
 525                 out << *driver.program_;
 526                 code = str.str();
 527             }
 528         }
 529
 530         add_history(command_.c_str());
 531         ++histlines;
 532
 533         if (debug)
 534             std::cout << code << std::endl;
 535
 536         Run(client_, code, fout, expand);
 537     }
 538
 539     if (append_history$ != NULL) {
 540         _syscall(close(_syscall(open(histfile, O_CREAT | O_WRONLY, 0600))));
 541         (*append_history$)(histlines, histfile);
 542     } else {
 543         write_history(histfile);
 544     }
 545
 546     fputs("\n", fout);
 547     fflush(fout);
 548 }
 549
 550 static void *Map(const char *path, size_t *psize) {
 551     int fd;
 552     _syscall(fd = open(path, O_RDONLY));
 553
 554     struct stat stat;
 555     _syscall(fstat(fd, &stat));
 556     size_t size(stat.st_size);
 557
 558     *psize = size;
 559
 560     void *base;
 561     _syscall(base = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0));
 562
 563     _syscall(close(fd));
 564     return base;
 565 }
 566
 567 void InjectLibrary(pid_t pid);
 568
 569 int Main(int argc, char const * const argv[], char const * const envp[]) {
 570     bool tty(isatty(STDIN_FILENO));
 571     bool compile(false);
 572     CYOptions options;
 573
 574     append_history$ = reinterpret_cast<int (*)(int, const char *)>(dlsym(RTLD_DEFAULT, "append_history"));
 575
 576 #ifdef CY_ATTACH
 577     pid_t pid(_not(pid_t));
 578 #endif
 579
 580     CYPool pool;
 581     apr_getopt_t *state;
 582     _aprcall(apr_getopt_init(&state, pool, argc, argv));
 583
 584     for (;;) {
 585         char opt;
 586         const char *arg;
 587
 588         apr_status_t status(apr_getopt(state,
 589             "cg:n:"
 590 #ifdef CY_ATTACH
 591             "p:"
 592 #endif
 593             "s"
 594         , &opt, &arg));
 595
 596         switch (status) {
 597             case APR_EOF:
 598                 goto getopt;
 599             case APR_BADCH:
 600             case APR_BADARG:
 601                 fprintf(stderr,
 602                     "usage: cycript [-c]"
 603 #ifdef CY_ATTACH
 604                     " [-p <pid|name>]"
 605 #endif
 606                     " [<script> [<arg>...]]\n"
 607                 );
 608                 return 1;
 609             default:
 610                 _aprcall(status);
 611         }
 612
 613         switch (opt) {
 614             case 'c':
 615                 compile = true;
 616             break;
 617
 618             case 'g':
 619                 if (false);
 620                 else if (strcmp(arg, "rename") == 0)
 621                     options.verbose_ = true;
 622 #if YYDEBUG
 623                 else if (strcmp(arg, "bison") == 0)
 624                     bison_ = true;
 625 #endif
 626                 else {
 627                     fprintf(stderr, "invalid name for -g\n");
 628                     return 1;
 629                 }
 630             break;
 631
 632             case 'n':
 633                 if (false);
 634                 else if (strcmp(arg, "minify") == 0)
 635                     pretty_ = true;
 636                 else {
 637                     fprintf(stderr, "invalid name for -n\n");
 638                     return 1;
 639                 }
 640             break;
 641
 642 #ifdef CY_ATTACH
 643             case 'p': {
 644                 size_t size(strlen(arg));
 645                 char *end;
 646
 647                 pid = strtoul(arg, &end, 0);
 648                 if (arg + size != end) {
 649                     // XXX: arg needs to be escaped in some horrendous way of doom
 650                     const char *command(apr_psprintf(pool, "ps axc|sed -e '/^ *[0-9]/{s/^ *\\([0-9]*\\)\\( *[^ ]*\\)\\{3\\} *-*\\([^ ]*\\)/\\3 \\1/;/^%s /{s/^[^ ]* //;q;};};d'", arg));
 651
 652                     if (FILE *pids = popen(command, "r")) {
 653                         char value[32];
 654                         size = 0;
 655
 656                         for (;;) {
 657                             size_t read(fread(value + size, 1, sizeof(value) - size, pids));
 658                             if (read == 0)
 659                                 break;
 660                             else {
 661                                 size += read;
 662                                 if (size == sizeof(value)) {
 663                                     pid = _not(pid_t);
 664                                     goto fail;
 665                                 }
 666                             }
 667                         }
 668
 669                       size:
 670                         if (size == 0)
 671                             goto fail;
 672                         if (value[size - 1] == '\n') {
 673                             --size;
 674                             goto size;
 675                         }
 676
 677                         value[size] = '\0';
 678                         size = strlen(value);
 679                         pid = strtoul(value, &end, 0);
 680                         if (value + size != end) fail:
 681                             pid = _not(pid_t);
 682                         _syscall(pclose(pids));
 683                     }
 684
 685                     if (pid == _not(pid_t)) {
 686                         fprintf(stderr, "invalid pid for -p\n");
 687                         return 1;
 688                     }
 689                 }
 690             } break;
 691 #endif
 692
 693             case 's':
 694                 strict_ = true;
 695             break;
 696         }
 697     } getopt:;
 698
 699     const char *script;
 700     int ind(state->ind);
 701
 702 #ifdef CY_ATTACH
 703     if (pid != _not(pid_t) && ind < argc - 1) {
 704         fprintf(stderr, "-p cannot set argv\n");
 705         return 1;
 706     }
 707
 708     if (pid != _not(pid_t) && compile) {
 709         fprintf(stderr, "-p conflicts with -c\n");
 710         return 1;
 711     }
 712 #endif
 713
 714     if (ind == argc)
 715         script = NULL;
 716     else {
 717 #ifdef CY_EXECUTE
 718         // XXX: const_cast?! wtf gcc :(
 719         CYSetArgs(argc - ind - 1, const_cast<const char **>(argv + ind + 1));
 720 #endif
 721         script = argv[ind];
 722         if (strcmp(script, "-") == 0)
 723             script = NULL;
 724     }
 725
 726 #ifdef CY_ATTACH
 727     if (pid != _not(pid_t) && script == NULL && !tty) {
 728         fprintf(stderr, "non-terminal attaching to remote console\n");
 729         return 1;
 730     }
 731 #endif
 732
 733 #ifdef CY_ATTACH
 734     if (pid == _not(pid_t))
 735         client_ = -1;
 736     else {
 737         int server(_syscall(socket(PF_UNIX, SOCK_STREAM, 0))); try {
 738             struct sockaddr_un address;
 739             memset(&address, 0, sizeof(address));
 740             address.sun_family = AF_UNIX;
 741
 742             sprintf(address.sun_path, "/tmp/.s.cy.%u", getpid());
 743
 744             _syscall(bind(server, reinterpret_cast<sockaddr *>(&address), SUN_LEN(&address)));
 745             _syscall(chmod(address.sun_path, 0777));
 746
 747             try {
 748                 _syscall(listen(server, 1));
 749                 InjectLibrary(pid);
 750                 client_ = _syscall(accept(server, NULL, NULL));
 751             } catch (...) {
 752                 // XXX: exception?
 753                 unlink(address.sun_path);
 754                 throw;
 755             }
 756         } catch (...) {
 757             _syscall(close(server));
 758             throw;
 759         }
 760     }
 761 #else
 762     client_ = -1;
 763 #endif
 764
 765     if (script == NULL && tty)
 766         Console(pool, options);
 767     else {
 768         CYDriver driver(pool, script ?: "<stdin>");
 769         cy::parser parser(driver);
 770         Setup(driver, parser);
 771
 772         char *start, *end;
 773
 774         if (script == NULL) {
 775             start = NULL;
 776             end = NULL;
 777
 778             driver.file_ = stdin;
 779         } else {
 780             size_t size;
 781             start = reinterpret_cast<char *>(Map(script, &size));
 782             end = start + size;
 783
 784             if (size >= 2 && start[0] == '#' && start[1] == '!') {
 785                 start += 2;
 786
 787                 if (void *line = memchr(start, '\n', end - start))
 788                     start = reinterpret_cast<char *>(line);
 789                 else
 790                     start = end;
 791             }
 792
 793             driver.data_ = start;
 794             driver.size_ = end - start;
 795         }
 796
 797         if (parser.parse() != 0 || !driver.errors_.empty()) {
 798             for (CYDriver::Errors::const_iterator i(driver.errors_.begin()); i != driver.errors_.end(); ++i)
 799                 std::cerr << i->location_.begin << ": " << i->message_ << std::endl;
 800         } else if (driver.program_ != NULL)
 801             if (client_ != -1) {
 802                 std::string code(start, end-start);
 803                 Run(client_, code, stdout);
 804             } else {
 805                 std::ostringstream str;
 806                 CYOutput out(str, options);
 807                 Setup(out, driver, options);
 808                 out << *driver.program_;
 809                 std::string code(str.str());
 810                 if (compile)
 811                     std::cout << code;
 812                 else
 813                     Run(client_, code, stdout);
 814             }
 815     }
 816
 817     return 0;
 818 }
 819
 820 int main(int argc, char const * const argv[], char const * const envp[]) {
 821     apr_status_t status(apr_app_initialize(&argc, &argv, &envp));
 822
 823     if (status != APR_SUCCESS) {
 824         fprintf(stderr, "apr_app_initialize() != APR_SUCCESS\n");
 825         return 1;
 826     } else try {
 827         return Main(argc, argv, envp);
 828     } catch (const CYException &error) {
 829         CYPool pool;
 830         fprintf(stderr, "%s\n", error.PoolCString(pool));
 831         return 1;
 832     }
 833 }