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);
 140 #else
 141         json = NULL;
 142 #endif
 143         mode_ = Working;
 144         if (json != NULL)
 145             size = strlen(json);
 146     } else {
 147         mode_ = Sending;
 148         size = code.size;
 149         CYSendAll(client, &size, sizeof(size));
 150         CYSendAll(client, code.data, code.size);
 151         mode_ = Waiting;
 152         CYRecvAll(client, &size, sizeof(size));
 153         if (size == _not(size_t))
 154             json = NULL;
 155         else {
 156             char *temp(new(pool) char[size + 1]);
 157             CYRecvAll(client, temp, size);
 158             temp[size] = '\0';
 159             json = temp;
 160         }
 161         mode_ = Working;
 162     }
 163
 164     return CYUTF8String(json, size);
 165 }
 166
 167 static CYUTF8String Run(CYPool &pool, int client, const std::string &code) {
 168     return Run(pool, client, CYUTF8String(code.c_str(), code.size()));
 169 }
 170
 171 FILE *fout_;
 172
 173 static void Output(CYUTF8String json, FILE *fout, bool expand = false) {
 174     const char *data(json.data);
 175     size_t size(json.size);
 176
 177     if (data == NULL || fout == NULL)
 178         return;
 179
 180     if (!expand || data[0] != '"' && data[0] != '\'')
 181         fputs(data, fout);
 182     else for (size_t i(0); i != size; ++i)
 183         if (data[i] != '\\')
 184             fputc(data[i], fout);
 185         else switch(data[++i]) {
 186             case '\0': goto done;
 187             case '\\': fputc('\\', fout); break;
 188             case '\'': fputc('\'', fout); break;
 189             case '"': fputc('"', fout); break;
 190             case 'b': fputc('\b', fout); break;
 191             case 'f': fputc('\f', fout); break;
 192             case 'n': fputc('\n', fout); break;
 193             case 'r': fputc('\r', fout); break;
 194             case 't': fputc('\t', fout); break;
 195             case 'v': fputc('\v', fout); break;
 196             default: fputc('\\', fout); --i; break;
 197         }
 198
 199   done:
 200     fputs("\n", fout);
 201     fflush(fout);
 202 }
 203
 204 static void Run(int client, const char *data, size_t size, FILE *fout = NULL, bool expand = false) {
 205     CYPool pool;
 206     Output(Run(pool, client, CYUTF8String(data, size)), fout, expand);
 207 }
 208
 209 static void Run(int client, std::string &code, FILE *fout = NULL, bool expand = false) {
 210     Run(client, code.c_str(), code.size(), fout, expand);
 211 }
 212
 213 int (*append_history$)(int, const char *);
 214
 215 static std::string command_;
 216
 217 static CYExpression *ParseExpression(CYPool &pool, CYUTF8String code) {
 218     std::ostringstream str;
 219     str << '(' << code << ')';
 220     std::string string(str.str());
 221
 222     CYDriver driver(pool);
 223     driver.data_ = string.c_str();
 224     driver.size_ = string.size();
 225
 226     cy::parser parser(driver);
 227     Setup(driver, parser);
 228
 229     if (parser.parse() != 0 || !driver.errors_.empty())
 230         _assert(false);
 231
 232     CYExpress *express(dynamic_cast<CYExpress *>(driver.program_->statements_));
 233     _assert(express != NULL);
 234     return express->expression_;
 235 }
 236
 237 static int client_;
 238
 239 static char **Complete(const char *word, int start, int end) {
 240     rl_attempted_completion_over = TRUE;
 241
 242     CYPool pool;
 243
 244     CYDriver driver(pool);
 245     cy::parser parser(driver);
 246     Setup(driver, parser);
 247
 248     std::string line(rl_line_buffer, start);
 249     std::string command(command_ + line);
 250
 251     driver.data_ = command.c_str();
 252     driver.size_ = command.size();
 253
 254     driver.auto_ = true;
 255
 256     if (parser.parse() != 0 || !driver.errors_.empty())
 257         return NULL;
 258
 259     if (driver.mode_ == CYDriver::AutoNone)
 260         return NULL;
 261
 262     CYExpression *expression;
 263
 264     CYOptions options;
 265     CYContext context(driver.pool_, options);
 266
 267     std::ostringstream prefix;
 268
 269     switch (driver.mode_) {
 270         case CYDriver::AutoPrimary:
 271             expression = $ CYThis();
 272         break;
 273
 274         case CYDriver::AutoDirect:
 275             expression = driver.context_;
 276         break;
 277
 278         case CYDriver::AutoIndirect:
 279             expression = $ CYIndirect(driver.context_);
 280         break;
 281
 282         case CYDriver::AutoMessage: {
 283             CYDriver::Context &thing(driver.contexts_.back());
 284             expression = $M($M($ CYIndirect(thing.context_), $S("isa")), $S("messages"));
 285             for (CYDriver::Context::Words::const_iterator part(thing.words_.begin()); part != thing.words_.end(); ++part)
 286                 prefix << (*part)->word_ << ':';
 287         } break;
 288
 289         default:
 290             _assert(false);
 291     }
 292
 293     std::string begin(prefix.str() + word);
 294
 295     driver.program_ = $ CYProgram($ CYExpress($C2(ParseExpression(pool,
 296     "   function(object, prefix) {\n"
 297     "       var names = [];\n"
 298     "       var pattern = '^' + prefix;\n"
 299     "       for (name in object)\n"
 300     "           if (name.match(pattern) != null)\n"
 301     "               names.push(name);\n"
 302     "       return names;\n"
 303     "   }\n"
 304     ), expression, $S(begin.c_str()))));
 305
 306     driver.program_->Replace(context);
 307
 308     std::ostringstream str;
 309     CYOutput out(str, options);
 310     out << *driver.program_;
 311
 312     std::string code(str.str());
 313     CYUTF8String json(Run(pool, client_, code));
 314
 315     CYExpression *result(ParseExpression(pool, json));
 316     CYArray *array(dynamic_cast<CYArray *>(result));
 317
 318     if (array == NULL) {
 319         fprintf(fout_, "\n");
 320         Output(json, fout_);
 321         rl_forced_update_display();
 322         return NULL;
 323     }
 324
 325     // XXX: use an std::set?
 326     typedef std::vector<std::string> Completions;
 327     Completions completions;
 328
 329     std::string common;
 330     bool rest(false);
 331
 332     for (CYElement *element(array->elements_); element != NULL; element = element->next_) {
 333         CYString *string(dynamic_cast<CYString *>(element->value_));
 334         _assert(string != NULL);
 335
 336         std::string completion(string->value_, string->size_);
 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     if (!common.empty()) {
 361         size_t size(prefix.str().size());
 362         _assert(common.size() >= size);
 363         common = common.substr(size);
 364     }
 365
 366     size_t colon(common.find(':'));
 367     if (colon != std::string::npos)
 368         common = common.substr(0, colon + 1);
 369
 370     char **results(reinterpret_cast<char **>(malloc(sizeof(char *) * (count + 2))));
 371
 372     results[0] = strdup(common.c_str());
 373     size_t index(0);
 374     for (Completions::const_iterator i(completions.begin()); i != completions.end(); ++i)
 375         results[++index] = strdup(i->c_str());
 376     results[count + 1] = NULL;
 377
 378     return results;
 379 }
 380
 381 // need char *, not const char *
 382 static char name_[] = "cycript";
 383 static char break_[] = " \t\n\"\\'`@$><=;|&{(" ".:";
 384
 385 static void Console(apr_pool_t *pool, CYOptions &options) {
 386     passwd *passwd;
 387     if (const char *username = getenv("LOGNAME"))
 388         passwd = getpwnam(username);
 389     else
 390         passwd = getpwuid(getuid());
 391
 392     const char *basedir(apr_psprintf(pool, "%s/.cycript", passwd->pw_dir));
 393     const char *histfile(apr_psprintf(pool, "%s/history", basedir));
 394     size_t histlines(0);
 395
 396     rl_initialize();
 397     rl_readline_name = name_;
 398
 399     mkdir(basedir, 0700);
 400     read_history(histfile);
 401
 402     bool bypass(false);
 403     bool debug(false);
 404     bool expand(false);
 405
 406     fout_ = stdout;
 407
 408     // rl_completer_word_break_characters is broken in libedit
 409     rl_basic_word_break_characters = break_;
 410
 411     rl_completer_word_break_characters = break_;
 412     rl_attempted_completion_function = &Complete;
 413     rl_bind_key('\t', rl_complete);
 414
 415     struct sigaction action;
 416     sigemptyset(&action.sa_mask);
 417     action.sa_handler = &sigint;
 418     action.sa_flags = 0;
 419     sigaction(SIGINT, &action, NULL);
 420
 421     restart: for (;;) {
 422         command_.clear();
 423         std::vector<std::string> lines;
 424
 425         bool extra(false);
 426         const char *prompt("cy# ");
 427
 428         if (setjmp(ctrlc_) != 0) {
 429             mode_ = Working;
 430             fputs("\n", fout_);
 431             fflush(fout_);
 432             goto restart;
 433         }
 434
 435       read:
 436         mode_ = Parsing;
 437         char *line(readline(prompt));
 438         mode_ = Working;
 439         if (line == NULL)
 440             break;
 441         if (line[0] == '\0')
 442             goto read;
 443
 444         if (!extra) {
 445             extra = true;
 446             if (line[0] == '?') {
 447                 std::string data(line + 1);
 448                 if (data == "bypass") {
 449                     bypass = !bypass;
 450                     fprintf(fout_, "bypass == %s\n", bypass ? "true" : "false");
 451                     fflush(fout_);
 452                 } else if (data == "debug") {
 453                     debug = !debug;
 454                     fprintf(fout_, "debug == %s\n", debug ? "true" : "false");
 455                     fflush(fout_);
 456                 } else if (data == "expand") {
 457                     expand = !expand;
 458                     fprintf(fout_, "expand == %s\n", expand ? "true" : "false");
 459                     fflush(fout_);
 460                 }
 461                 add_history(line);
 462                 ++histlines;
 463                 goto restart;
 464             }
 465         }
 466
 467         command_ += line;
 468
 469         char *begin(line), *end(line + strlen(line));
 470         while (char *nl = reinterpret_cast<char *>(memchr(begin, '\n', end - begin))) {
 471             *nl = '\0';
 472             lines.push_back(begin);
 473             begin = nl + 1;
 474         }
 475
 476         lines.push_back(begin);
 477
 478         free(line);
 479
 480         std::string code;
 481
 482         if (bypass)
 483             code = command_;
 484         else {
 485             CYDriver driver;
 486             cy::parser parser(driver);
 487             Setup(driver, parser);
 488
 489             driver.data_ = command_.c_str();
 490             driver.size_ = command_.size();
 491
 492             if (parser.parse() != 0 || !driver.errors_.empty()) {
 493                 for (CYDriver::Errors::const_iterator error(driver.errors_.begin()); error != driver.errors_.end(); ++error) {
 494                     cy::position begin(error->location_.begin);
 495                     if (begin.line != lines.size() || begin.column - 1 != lines.back().size() || error->warning_) {
 496                         cy::position end(error->location_.end);
 497
 498                         if (begin.line != lines.size()) {
 499                             std::cerr << "  | ";
 500                             std::cerr << lines[begin.line - 1] << std::endl;
 501                         }
 502
 503                         std::cerr << "....";
 504                         for (size_t i(0); i != begin.column - 1; ++i)
 505                             std::cerr << '.';
 506                         if (begin.line != end.line || begin.column == end.column)
 507                             std::cerr << '^';
 508                         else for (size_t i(0), e(end.column - begin.column); i != e; ++i)
 509                             std::cerr << '^';
 510                         std::cerr << std::endl;
 511
 512                         std::cerr << "  | ";
 513                         std::cerr << error->message_ << std::endl;
 514
 515                         add_history(command_.c_str());
 516                         ++histlines;
 517                         goto restart;
 518                     }
 519                 }
 520
 521                 driver.errors_.clear();
 522
 523                 command_ += '\n';
 524                 prompt = "cy> ";
 525                 goto read;
 526             }
 527
 528             if (driver.program_ == NULL)
 529                 goto restart;
 530
 531             if (client_ != -1)
 532                 code = command_;
 533             else {
 534                 std::ostringstream str;
 535                 CYOutput out(str, options);
 536                 Setup(out, driver, options);
 537                 out << *driver.program_;
 538                 code = str.str();
 539             }
 540         }
 541
 542         add_history(command_.c_str());
 543         ++histlines;
 544
 545         if (debug)
 546             std::cout << code << std::endl;
 547
 548         Run(client_, code, fout_, expand);
 549     }
 550
 551     if (append_history$ != NULL) {
 552         _syscall(close(_syscall(open(histfile, O_CREAT | O_WRONLY, 0600))));
 553         (*append_history$)(histlines, histfile);
 554     } else {
 555         write_history(histfile);
 556     }
 557
 558     fputs("\n", fout_);
 559     fflush(fout_);
 560 }
 561
 562 static void *Map(const char *path, size_t *psize) {
 563     int fd;
 564     _syscall(fd = open(path, O_RDONLY));
 565
 566     struct stat stat;
 567     _syscall(fstat(fd, &stat));
 568     size_t size(stat.st_size);
 569
 570     *psize = size;
 571
 572     void *base;
 573     _syscall(base = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0));
 574
 575     _syscall(close(fd));
 576     return base;
 577 }
 578
 579 void InjectLibrary(pid_t pid);
 580
 581 int Main(int argc, char const * const argv[], char const * const envp[]) {
 582     bool tty(isatty(STDIN_FILENO));
 583     bool compile(false);
 584     CYOptions options;
 585
 586     append_history$ = reinterpret_cast<int (*)(int, const char *)>(dlsym(RTLD_DEFAULT, "append_history"));
 587
 588 #ifdef CY_ATTACH
 589     pid_t pid(_not(pid_t));
 590 #endif
 591
 592     CYPool pool;
 593     apr_getopt_t *state;
 594     _aprcall(apr_getopt_init(&state, pool, argc, argv));
 595
 596     for (;;) {
 597         char opt;
 598         const char *arg;
 599
 600         apr_status_t status(apr_getopt(state,
 601             "cg:n:"
 602 #ifdef CY_ATTACH
 603             "p:"
 604 #endif
 605             "s"
 606         , &opt, &arg));
 607
 608         switch (status) {
 609             case APR_EOF:
 610                 goto getopt;
 611             case APR_BADCH:
 612             case APR_BADARG:
 613                 fprintf(stderr,
 614                     "usage: cycript [-c]"
 615 #ifdef CY_ATTACH
 616                     " [-p <pid|name>]"
 617 #endif
 618                     " [<script> [<arg>...]]\n"
 619                 );
 620                 return 1;
 621             default:
 622                 _aprcall(status);
 623         }
 624
 625         switch (opt) {
 626             case 'c':
 627                 compile = true;
 628             break;
 629
 630             case 'g':
 631                 if (false);
 632                 else if (strcmp(arg, "rename") == 0)
 633                     options.verbose_ = true;
 634 #if YYDEBUG
 635                 else if (strcmp(arg, "bison") == 0)
 636                     bison_ = true;
 637 #endif
 638                 else {
 639                     fprintf(stderr, "invalid name for -g\n");
 640                     return 1;
 641                 }
 642             break;
 643
 644             case 'n':
 645                 if (false);
 646                 else if (strcmp(arg, "minify") == 0)
 647                     pretty_ = true;
 648                 else {
 649                     fprintf(stderr, "invalid name for -n\n");
 650                     return 1;
 651                 }
 652             break;
 653
 654 #ifdef CY_ATTACH
 655             case 'p': {
 656                 size_t size(strlen(arg));
 657                 char *end;
 658
 659                 pid = strtoul(arg, &end, 0);
 660                 if (arg + size != end) {
 661                     // XXX: arg needs to be escaped in some horrendous way of doom
 662                     const char *command(apr_psprintf(pool, "ps axc|sed -e '/^ *[0-9]/{s/^ *\\([0-9]*\\)\\( *[^ ]*\\)\\{3\\} *-*\\([^ ]*\\)/\\3 \\1/;/^%s /{s/^[^ ]* //;q;};};d'", arg));
 663
 664                     if (FILE *pids = popen(command, "r")) {
 665                         char value[32];
 666                         size = 0;
 667
 668                         for (;;) {
 669                             size_t read(fread(value + size, 1, sizeof(value) - size, pids));
 670                             if (read == 0)
 671                                 break;
 672                             else {
 673                                 size += read;
 674                                 if (size == sizeof(value)) {
 675                                     pid = _not(pid_t);
 676                                     goto fail;
 677                                 }
 678                             }
 679                         }
 680
 681                       size:
 682                         if (size == 0)
 683                             goto fail;
 684                         if (value[size - 1] == '\n') {
 685                             --size;
 686                             goto size;
 687                         }
 688
 689                         value[size] = '\0';
 690                         size = strlen(value);
 691                         pid = strtoul(value, &end, 0);
 692                         if (value + size != end) fail:
 693                             pid = _not(pid_t);
 694                         _syscall(pclose(pids));
 695                     }
 696
 697                     if (pid == _not(pid_t)) {
 698                         fprintf(stderr, "invalid pid for -p\n");
 699                         return 1;
 700                     }
 701                 }
 702             } break;
 703 #endif
 704
 705             case 's':
 706                 strict_ = true;
 707             break;
 708         }
 709     } getopt:;
 710
 711     const char *script;
 712     int ind(state->ind);
 713
 714 #ifdef CY_ATTACH
 715     if (pid != _not(pid_t) && ind < argc - 1) {
 716         fprintf(stderr, "-p cannot set argv\n");
 717         return 1;
 718     }
 719
 720     if (pid != _not(pid_t) && compile) {
 721         fprintf(stderr, "-p conflicts with -c\n");
 722         return 1;
 723     }
 724 #endif
 725
 726     if (ind == argc)
 727         script = NULL;
 728     else {
 729 #ifdef CY_EXECUTE
 730         // XXX: const_cast?! wtf gcc :(
 731         CYSetArgs(argc - ind - 1, const_cast<const char **>(argv + ind + 1));
 732 #endif
 733         script = argv[ind];
 734         if (strcmp(script, "-") == 0)
 735             script = NULL;
 736     }
 737
 738 #ifdef CY_ATTACH
 739     if (pid != _not(pid_t) && script == NULL && !tty) {
 740         fprintf(stderr, "non-terminal attaching to remote console\n");
 741         return 1;
 742     }
 743 #endif
 744
 745 #ifdef CY_ATTACH
 746     if (pid == _not(pid_t))
 747         client_ = -1;
 748     else {
 749         int server(_syscall(socket(PF_UNIX, SOCK_STREAM, 0))); try {
 750             struct sockaddr_un address;
 751             memset(&address, 0, sizeof(address));
 752             address.sun_family = AF_UNIX;
 753
 754             sprintf(address.sun_path, "/tmp/.s.cy.%u", getpid());
 755
 756             _syscall(bind(server, reinterpret_cast<sockaddr *>(&address), SUN_LEN(&address)));
 757             _syscall(chmod(address.sun_path, 0777));
 758
 759             try {
 760                 _syscall(listen(server, 1));
 761                 InjectLibrary(pid);
 762                 client_ = _syscall(accept(server, NULL, NULL));
 763             } catch (...) {
 764                 // XXX: exception?
 765                 unlink(address.sun_path);
 766                 throw;
 767             }
 768         } catch (...) {
 769             _syscall(close(server));
 770             throw;
 771         }
 772     }
 773 #else
 774     client_ = -1;
 775 #endif
 776
 777     if (script == NULL && tty)
 778         Console(pool, options);
 779     else {
 780         CYDriver driver(pool, 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 }