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     rl_attempted_completion_function = &Complete;
 399     rl_bind_key('\t', rl_complete);
 400
 401     struct sigaction action;
 402     sigemptyset(&action.sa_mask);
 403     action.sa_handler = &sigint;
 404     action.sa_flags = 0;
 405     sigaction(SIGINT, &action, NULL);
 406
 407     restart: for (;;) {
 408         command_.clear();
 409         std::vector<std::string> lines;
 410
 411         bool extra(false);
 412         const char *prompt("cy# ");
 413
 414         if (setjmp(ctrlc_) != 0) {
 415             mode_ = Working;
 416             fputs("\n", fout);
 417             fflush(fout);
 418             goto restart;
 419         }
 420
 421       read:
 422         mode_ = Parsing;
 423         char *line(readline(prompt));
 424         mode_ = Working;
 425         if (line == NULL)
 426             break;
 427         if (line[0] == '\0')
 428             goto read;
 429
 430         if (!extra) {
 431             extra = true;
 432             if (line[0] == '?') {
 433                 std::string data(line + 1);
 434                 if (data == "bypass") {
 435                     bypass = !bypass;
 436                     fprintf(fout, "bypass == %s\n", bypass ? "true" : "false");
 437                     fflush(fout);
 438                 } else if (data == "debug") {
 439                     debug = !debug;
 440                     fprintf(fout, "debug == %s\n", debug ? "true" : "false");
 441                     fflush(fout);
 442                 } else if (data == "expand") {
 443                     expand = !expand;
 444                     fprintf(fout, "expand == %s\n", expand ? "true" : "false");
 445                     fflush(fout);
 446                 }
 447                 add_history(line);
 448                 ++histlines;
 449                 goto restart;
 450             }
 451         }
 452
 453         command_ += line;
 454
 455         char *begin(line), *end(line + strlen(line));
 456         while (char *nl = reinterpret_cast<char *>(memchr(begin, '\n', end - begin))) {
 457             *nl = '\0';
 458             lines.push_back(begin);
 459             begin = nl + 1;
 460         }
 461
 462         lines.push_back(begin);
 463
 464         free(line);
 465
 466         std::string code;
 467
 468         if (bypass)
 469             code = command_;
 470         else {
 471             CYDriver driver;
 472             cy::parser parser(driver);
 473             Setup(driver, parser);
 474
 475             driver.data_ = command_.c_str();
 476             driver.size_ = command_.size();
 477
 478             if (parser.parse() != 0 || !driver.errors_.empty()) {
 479                 for (CYDriver::Errors::const_iterator error(driver.errors_.begin()); error != driver.errors_.end(); ++error) {
 480                     cy::position begin(error->location_.begin);
 481                     if (begin.line != lines.size() || begin.column - 1 != lines.back().size() || error->warning_) {
 482                         cy::position end(error->location_.end);
 483
 484                         if (begin.line != lines.size()) {
 485                             std::cerr << "  | ";
 486                             std::cerr << lines[begin.line - 1] << std::endl;
 487                         }
 488
 489                         std::cerr << "....";
 490                         for (size_t i(0); i != begin.column - 1; ++i)
 491                             std::cerr << '.';
 492                         if (begin.line != end.line || begin.column == end.column)
 493                             std::cerr << '^';
 494                         else for (size_t i(0), e(end.column - begin.column); i != e; ++i)
 495                             std::cerr << '^';
 496                         std::cerr << std::endl;
 497
 498                         std::cerr << "  | ";
 499                         std::cerr << error->message_ << std::endl;
 500
 501                         add_history(command_.c_str());
 502                         ++histlines;
 503                         goto restart;
 504                     }
 505                 }
 506
 507                 driver.errors_.clear();
 508
 509                 command_ += '\n';
 510                 prompt = "cy> ";
 511                 goto read;
 512             }
 513
 514             if (driver.program_ == NULL)
 515                 goto restart;
 516
 517             if (client_ != -1)
 518                 code = command_;
 519             else {
 520                 std::ostringstream str;
 521                 CYOutput out(str, options);
 522                 Setup(out, driver, options);
 523                 out << *driver.program_;
 524                 code = str.str();
 525             }
 526         }
 527
 528         add_history(command_.c_str());
 529         ++histlines;
 530
 531         if (debug)
 532             std::cout << code << std::endl;
 533
 534         Run(client_, code, fout, expand);
 535     }
 536
 537     if (append_history$ != NULL) {
 538         _syscall(close(_syscall(open(histfile, O_CREAT | O_WRONLY, 0600))));
 539         (*append_history$)(histlines, histfile);
 540     } else {
 541         write_history(histfile);
 542     }
 543
 544     fputs("\n", fout);
 545     fflush(fout);
 546 }
 547
 548 static void *Map(const char *path, size_t *psize) {
 549     int fd;
 550     _syscall(fd = open(path, O_RDONLY));
 551
 552     struct stat stat;
 553     _syscall(fstat(fd, &stat));
 554     size_t size(stat.st_size);
 555
 556     *psize = size;
 557
 558     void *base;
 559     _syscall(base = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0));
 560
 561     _syscall(close(fd));
 562     return base;
 563 }
 564
 565 void InjectLibrary(pid_t pid);
 566
 567 int Main(int argc, char const * const argv[], char const * const envp[]) {
 568     bool tty(isatty(STDIN_FILENO));
 569     bool compile(false);
 570     CYOptions options;
 571
 572     append_history$ = reinterpret_cast<int (*)(int, const char *)>(dlsym(RTLD_DEFAULT, "append_history"));
 573
 574 #ifdef CY_ATTACH
 575     pid_t pid(_not(pid_t));
 576 #endif
 577
 578     CYPool pool;
 579     apr_getopt_t *state;
 580     _aprcall(apr_getopt_init(&state, pool, argc, argv));
 581
 582     for (;;) {
 583         char opt;
 584         const char *arg;
 585
 586         apr_status_t status(apr_getopt(state,
 587             "cg:n:"
 588 #ifdef CY_ATTACH
 589             "p:"
 590 #endif
 591             "s"
 592         , &opt, &arg));
 593
 594         switch (status) {
 595             case APR_EOF:
 596                 goto getopt;
 597             case APR_BADCH:
 598             case APR_BADARG:
 599                 fprintf(stderr,
 600                     "usage: cycript [-c]"
 601 #ifdef CY_ATTACH
 602                     " [-p <pid|name>]"
 603 #endif
 604                     " [<script> [<arg>...]]\n"
 605                 );
 606                 return 1;
 607             default:
 608                 _aprcall(status);
 609         }
 610
 611         switch (opt) {
 612             case 'c':
 613                 compile = true;
 614             break;
 615
 616             case 'g':
 617                 if (false);
 618                 else if (strcmp(arg, "rename") == 0)
 619                     options.verbose_ = true;
 620 #if YYDEBUG
 621                 else if (strcmp(arg, "bison") == 0)
 622                     bison_ = true;
 623 #endif
 624                 else {
 625                     fprintf(stderr, "invalid name for -g\n");
 626                     return 1;
 627                 }
 628             break;
 629
 630             case 'n':
 631                 if (false);
 632                 else if (strcmp(arg, "minify") == 0)
 633                     pretty_ = true;
 634                 else {
 635                     fprintf(stderr, "invalid name for -n\n");
 636                     return 1;
 637                 }
 638             break;
 639
 640 #ifdef CY_ATTACH
 641             case 'p': {
 642                 size_t size(strlen(arg));
 643                 char *end;
 644
 645                 pid = strtoul(arg, &end, 0);
 646                 if (arg + size != end) {
 647                     // XXX: arg needs to be escaped in some horrendous way of doom
 648                     const char *command(apr_psprintf(pool, "ps axc|sed -e '/^ *[0-9]/{s/^ *\\([0-9]*\\)\\( *[^ ]*\\)\\{3\\} *-*\\([^ ]*\\)/\\3 \\1/;/^%s /{s/^[^ ]* //;q;};};d'", arg));
 649
 650                     if (FILE *pids = popen(command, "r")) {
 651                         char value[32];
 652                         size = 0;
 653
 654                         for (;;) {
 655                             size_t read(fread(value + size, 1, sizeof(value) - size, pids));
 656                             if (read == 0)
 657                                 break;
 658                             else {
 659                                 size += read;
 660                                 if (size == sizeof(value)) {
 661                                     pid = _not(pid_t);
 662                                     goto fail;
 663                                 }
 664                             }
 665                         }
 666
 667                       size:
 668                         if (size == 0)
 669                             goto fail;
 670                         if (value[size - 1] == '\n') {
 671                             --size;
 672                             goto size;
 673                         }
 674
 675                         value[size] = '\0';
 676                         size = strlen(value);
 677                         pid = strtoul(value, &end, 0);
 678                         if (value + size != end) fail:
 679                             pid = _not(pid_t);
 680                         _syscall(pclose(pids));
 681                     }
 682
 683                     if (pid == _not(pid_t)) {
 684                         fprintf(stderr, "invalid pid for -p\n");
 685                         return 1;
 686                     }
 687                 }
 688             } break;
 689 #endif
 690
 691             case 's':
 692                 strict_ = true;
 693             break;
 694         }
 695     } getopt:;
 696
 697     const char *script;
 698     int ind(state->ind);
 699
 700 #ifdef CY_ATTACH
 701     if (pid != _not(pid_t) && ind < argc - 1) {
 702         fprintf(stderr, "-p cannot set argv\n");
 703         return 1;
 704     }
 705
 706     if (pid != _not(pid_t) && compile) {
 707         fprintf(stderr, "-p conflicts with -c\n");
 708         return 1;
 709     }
 710 #endif
 711
 712     if (ind == argc)
 713         script = NULL;
 714     else {
 715 #ifdef CY_EXECUTE
 716         // XXX: const_cast?! wtf gcc :(
 717         CYSetArgs(argc - ind - 1, const_cast<const char **>(argv + ind + 1));
 718 #endif
 719         script = argv[ind];
 720         if (strcmp(script, "-") == 0)
 721             script = NULL;
 722     }
 723
 724 #ifdef CY_ATTACH
 725     if (pid != _not(pid_t) && script == NULL && !tty) {
 726         fprintf(stderr, "non-terminal attaching to remote console\n");
 727         return 1;
 728     }
 729 #endif
 730
 731 #ifdef CY_ATTACH
 732     if (pid == _not(pid_t))
 733         client_ = -1;
 734     else {
 735         int server(_syscall(socket(PF_UNIX, SOCK_STREAM, 0))); try {
 736             struct sockaddr_un address;
 737             memset(&address, 0, sizeof(address));
 738             address.sun_family = AF_UNIX;
 739
 740             sprintf(address.sun_path, "/tmp/.s.cy.%u", getpid());
 741
 742             _syscall(bind(server, reinterpret_cast<sockaddr *>(&address), SUN_LEN(&address)));
 743             _syscall(chmod(address.sun_path, 0777));
 744
 745             try {
 746                 _syscall(listen(server, 1));
 747                 InjectLibrary(pid);
 748                 client_ = _syscall(accept(server, NULL, NULL));
 749             } catch (...) {
 750                 // XXX: exception?
 751                 unlink(address.sun_path);
 752                 throw;
 753             }
 754         } catch (...) {
 755             _syscall(close(server));
 756             throw;
 757         }
 758     }
 759 #else
 760     client_ = -1;
 761 #endif
 762
 763     if (script == NULL && tty)
 764         Console(pool, options);
 765     else {
 766         CYDriver driver(pool, script ?: "<stdin>");
 767         cy::parser parser(driver);
 768         Setup(driver, parser);
 769
 770         char *start, *end;
 771
 772         if (script == NULL) {
 773             start = NULL;
 774             end = NULL;
 775
 776             driver.file_ = stdin;
 777         } else {
 778             size_t size;
 779             start = reinterpret_cast<char *>(Map(script, &size));
 780             end = start + size;
 781
 782             if (size >= 2 && start[0] == '#' && start[1] == '!') {
 783                 start += 2;
 784
 785                 if (void *line = memchr(start, '\n', end - start))
 786                     start = reinterpret_cast<char *>(line);
 787                 else
 788                     start = end;
 789             }
 790
 791             driver.data_ = start;
 792             driver.size_ = end - start;
 793         }
 794
 795         if (parser.parse() != 0 || !driver.errors_.empty()) {
 796             for (CYDriver::Errors::const_iterator i(driver.errors_.begin()); i != driver.errors_.end(); ++i)
 797                 std::cerr << i->location_.begin << ": " << i->message_ << std::endl;
 798         } else if (driver.program_ != NULL)
 799             if (client_ != -1) {
 800                 std::string code(start, end-start);
 801                 Run(client_, code, stdout);
 802             } else {
 803                 std::ostringstream str;
 804                 CYOutput out(str, options);
 805                 Setup(out, driver, options);
 806                 out << *driver.program_;
 807                 std::string code(str.str());
 808                 if (compile)
 809                     std::cout << code;
 810                 else
 811                     Run(client_, code, stdout);
 812             }
 813     }
 814
 815     return 0;
 816 }
 817
 818 int main(int argc, char const * const argv[], char const * const envp[]) {
 819     apr_status_t status(apr_app_initialize(&argc, &argv, &envp));
 820
 821     if (status != APR_SUCCESS) {
 822         fprintf(stderr, "apr_app_initialize() != APR_SUCCESS\n");
 823         return 1;
 824     } else try {
 825         return Main(argc, argv, envp);
 826     } catch (const CYException &error) {
 827         CYPool pool;
 828         fprintf(stderr, "%s\n", error.PoolCString(pool));
 829         return 1;
 830     }
 831 }