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 void Run(int client, const char *data, size_t size, FILE *fout = NULL, bool expand = false) {
 172     CYPool pool;
 173     CYUTF8String json(Run(pool, client, CYUTF8String(data, size)));
 174
 175     data = json.data;
 176     size = json.size;
 177
 178     if (data != NULL && fout != NULL) {
 179         if (!expand || data[0] != '"' && data[0] != '\'')
 180             fputs(data, fout);
 181         else for (size_t i(0); i != size; ++i)
 182             if (data[i] != '\\')
 183                 fputc(data[i], fout);
 184             else switch(data[++i]) {
 185                 case '\0': goto done;
 186                 case '\\': fputc('\\', fout); break;
 187                 case '\'': fputc('\'', fout); break;
 188                 case '"': fputc('"', fout); break;
 189                 case 'b': fputc('\b', fout); break;
 190                 case 'f': fputc('\f', fout); break;
 191                 case 'n': fputc('\n', fout); break;
 192                 case 'r': fputc('\r', fout); break;
 193                 case 't': fputc('\t', fout); break;
 194                 case 'v': fputc('\v', fout); break;
 195                 default: fputc('\\', fout); --i; break;
 196             }
 197
 198       done:
 199         fputs("\n", fout);
 200         fflush(fout);
 201     }
 202 }
 203
 204 static void Run(int client, std::string &code, FILE *fout = NULL, bool expand = false) {
 205     Run(client, code.c_str(), code.size(), fout, expand);
 206 }
 207
 208 int (*append_history$)(int, const char *);
 209
 210 static std::string command_;
 211
 212 static CYExpression *ParseExpression(CYPool &pool, CYUTF8String code) {
 213     std::ostringstream str;
 214     str << '(' << code << ')';
 215     std::string string(str.str());
 216
 217     CYDriver driver(pool);
 218     driver.data_ = string.c_str();
 219     driver.size_ = string.size();
 220
 221     cy::parser parser(driver);
 222     Setup(driver, parser);
 223
 224     if (parser.parse() != 0 || !driver.errors_.empty())
 225         _assert(false);
 226
 227     CYExpress *express(dynamic_cast<CYExpress *>(driver.program_->statements_));
 228     _assert(express != NULL);
 229     return express->expression_;
 230 }
 231
 232 static int client_;
 233
 234 static char **Complete(const char *word, int start, int end) {
 235     rl_attempted_completion_over = TRUE;
 236
 237     CYPool pool;
 238
 239     CYDriver driver(pool);
 240     cy::parser parser(driver);
 241     Setup(driver, parser);
 242
 243     std::string line(rl_line_buffer, start);
 244     std::string command(command_ + line);
 245
 246     driver.data_ = command.c_str();
 247     driver.size_ = command.size();
 248
 249     driver.auto_ = true;
 250
 251     if (parser.parse() != 0 || !driver.errors_.empty())
 252         return NULL;
 253
 254     if (driver.mode_ == CYDriver::AutoNone)
 255         return NULL;
 256
 257     CYExpression *expression;
 258
 259     CYOptions options;
 260     CYContext context(driver.pool_, options);
 261
 262     std::ostringstream prefix;
 263
 264     switch (driver.mode_) {
 265         case CYDriver::AutoPrimary:
 266             expression = $ CYThis();
 267         break;
 268
 269         case CYDriver::AutoDirect:
 270             expression = driver.context_;
 271         break;
 272
 273         case CYDriver::AutoIndirect:
 274             expression = $ CYIndirect(driver.context_);
 275         break;
 276
 277         case CYDriver::AutoMessage: {
 278             CYDriver::Context &thing(driver.contexts_.back());
 279             expression = $M($M($ CYIndirect(thing.context_), $S("isa")), $S("messages"));
 280             for (CYDriver::Context::Words::const_iterator part(thing.words_.begin()); part != thing.words_.end(); ++part)
 281                 prefix << (*part)->word_ << ':';
 282         } break;
 283
 284         default:
 285             _assert(false);
 286     }
 287
 288     std::string begin(prefix.str() + word);
 289
 290     driver.program_ = $ CYProgram($ CYExpress($C2(ParseExpression(pool,
 291     "   function(object, prefix) {\n"
 292     "       var names = [];\n"
 293     "       var pattern = '^' + prefix;\n"
 294     "       for (name in object)\n"
 295     "           if (name.match(pattern) != null)\n"
 296     "               names.push(name);\n"
 297     "       return names;\n"
 298     "   }\n"
 299     ), expression, $S(begin.c_str()))));
 300
 301     driver.program_->Replace(context);
 302
 303     std::ostringstream str;
 304     CYOutput out(str, options);
 305     out << *driver.program_;
 306
 307     std::string code(str.str());
 308     CYUTF8String json(Run(pool, client_, code));
 309
 310     CYExpression *result(ParseExpression(pool, json));
 311     CYArray *array(dynamic_cast<CYArray *>(result));
 312     _assert(array != NULL);
 313
 314     // XXX: use an std::set?
 315     typedef std::vector<std::string> Completions;
 316     Completions completions;
 317
 318     std::string common;
 319     bool rest(false);
 320
 321     for (CYElement *element(array->elements_); element != NULL; element = element->next_) {
 322         CYString *string(dynamic_cast<CYString *>(element->value_));
 323         _assert(string != NULL);
 324
 325         std::string completion(string->value_, string->size_);
 326         completions.push_back(completion);
 327
 328         if (!rest) {
 329             common = completion;
 330             rest = true;
 331         } else {
 332             size_t limit(completion.size()), size(common.size());
 333             if (size > limit)
 334                 common = common.substr(0, limit);
 335             else
 336                 limit = size;
 337             for (limit = 0; limit != size; ++limit)
 338                 if (common[limit] != completion[limit])
 339                     break;
 340             if (limit != size)
 341                 common = common.substr(0, limit);
 342         }
 343     }
 344
 345     size_t count(completions.size());
 346     if (count == 0)
 347         return NULL;
 348
 349     if (!common.empty()) {
 350         size_t size(prefix.str().size());
 351         _assert(common.size() >= size);
 352         common = common.substr(size);
 353     }
 354
 355     size_t colon(common.find(':'));
 356     if (colon != std::string::npos)
 357         common = common.substr(0, colon + 1);
 358
 359     char **results(reinterpret_cast<char **>(malloc(sizeof(char *) * (count + 2))));
 360
 361     results[0] = strdup(common.c_str());
 362     size_t index(0);
 363     for (Completions::const_iterator i(completions.begin()); i != completions.end(); ++i)
 364         results[++index] = strdup(i->c_str());
 365     results[count + 1] = NULL;
 366
 367     return results;
 368 }
 369
 370 // need char *, not const char *
 371 static char name_[] = "cycript";
 372 static char break_[] = " \t\n\"\\'`@$><=;|&{(" ".:";
 373
 374 static void Console(apr_pool_t *pool, CYOptions &options) {
 375     passwd *passwd;
 376     if (const char *username = getenv("LOGNAME"))
 377         passwd = getpwnam(username);
 378     else
 379         passwd = getpwuid(getuid());
 380
 381     const char *basedir(apr_psprintf(pool, "%s/.cycript", passwd->pw_dir));
 382     const char *histfile(apr_psprintf(pool, "%s/history", basedir));
 383     size_t histlines(0);
 384
 385     rl_initialize();
 386     rl_readline_name = name_;
 387
 388     mkdir(basedir, 0700);
 389     read_history(histfile);
 390
 391     bool bypass(false);
 392     bool debug(false);
 393     bool expand(false);
 394
 395     FILE *fout(stdout);
 396
 397     // rl_completer_word_break_characters is broken in libedit
 398     rl_basic_word_break_characters = break_;
 399
 400     rl_completer_word_break_characters = break_;
 401     rl_attempted_completion_function = &Complete;
 402     rl_bind_key('\t', rl_complete);
 403
 404     struct sigaction action;
 405     sigemptyset(&action.sa_mask);
 406     action.sa_handler = &sigint;
 407     action.sa_flags = 0;
 408     sigaction(SIGINT, &action, NULL);
 409
 410     restart: for (;;) {
 411         command_.clear();
 412         std::vector<std::string> lines;
 413
 414         bool extra(false);
 415         const char *prompt("cy# ");
 416
 417         if (setjmp(ctrlc_) != 0) {
 418             mode_ = Working;
 419             fputs("\n", fout);
 420             fflush(fout);
 421             goto restart;
 422         }
 423
 424       read:
 425         mode_ = Parsing;
 426         char *line(readline(prompt));
 427         mode_ = Working;
 428         if (line == NULL)
 429             break;
 430         if (line[0] == '\0')
 431             goto read;
 432
 433         if (!extra) {
 434             extra = true;
 435             if (line[0] == '?') {
 436                 std::string data(line + 1);
 437                 if (data == "bypass") {
 438                     bypass = !bypass;
 439                     fprintf(fout, "bypass == %s\n", bypass ? "true" : "false");
 440                     fflush(fout);
 441                 } else if (data == "debug") {
 442                     debug = !debug;
 443                     fprintf(fout, "debug == %s\n", debug ? "true" : "false");
 444                     fflush(fout);
 445                 } else if (data == "expand") {
 446                     expand = !expand;
 447                     fprintf(fout, "expand == %s\n", expand ? "true" : "false");
 448                     fflush(fout);
 449                 }
 450                 add_history(line);
 451                 ++histlines;
 452                 goto restart;
 453             }
 454         }
 455
 456         command_ += line;
 457
 458         char *begin(line), *end(line + strlen(line));
 459         while (char *nl = reinterpret_cast<char *>(memchr(begin, '\n', end - begin))) {
 460             *nl = '\0';
 461             lines.push_back(begin);
 462             begin = nl + 1;
 463         }
 464
 465         lines.push_back(begin);
 466
 467         free(line);
 468
 469         std::string code;
 470
 471         if (bypass)
 472             code = command_;
 473         else {
 474             CYDriver driver;
 475             cy::parser parser(driver);
 476             Setup(driver, parser);
 477
 478             driver.data_ = command_.c_str();
 479             driver.size_ = command_.size();
 480
 481             if (parser.parse() != 0 || !driver.errors_.empty()) {
 482                 for (CYDriver::Errors::const_iterator error(driver.errors_.begin()); error != driver.errors_.end(); ++error) {
 483                     cy::position begin(error->location_.begin);
 484                     if (begin.line != lines.size() || begin.column - 1 != lines.back().size() || error->warning_) {
 485                         cy::position end(error->location_.end);
 486
 487                         if (begin.line != lines.size()) {
 488                             std::cerr << "  | ";
 489                             std::cerr << lines[begin.line - 1] << std::endl;
 490                         }
 491
 492                         std::cerr << "....";
 493                         for (size_t i(0); i != begin.column - 1; ++i)
 494                             std::cerr << '.';
 495                         if (begin.line != end.line || begin.column == end.column)
 496                             std::cerr << '^';
 497                         else for (size_t i(0), e(end.column - begin.column); i != e; ++i)
 498                             std::cerr << '^';
 499                         std::cerr << std::endl;
 500
 501                         std::cerr << "  | ";
 502                         std::cerr << error->message_ << std::endl;
 503
 504                         add_history(command_.c_str());
 505                         ++histlines;
 506                         goto restart;
 507                     }
 508                 }
 509
 510                 driver.errors_.clear();
 511
 512                 command_ += '\n';
 513                 prompt = "cy> ";
 514                 goto read;
 515             }
 516
 517             if (driver.program_ == NULL)
 518                 goto restart;
 519
 520             if (client_ != -1)
 521                 code = command_;
 522             else {
 523                 std::ostringstream str;
 524                 CYOutput out(str, options);
 525                 Setup(out, driver, options);
 526                 out << *driver.program_;
 527                 code = str.str();
 528             }
 529         }
 530
 531         add_history(command_.c_str());
 532         ++histlines;
 533
 534         if (debug)
 535             std::cout << code << std::endl;
 536
 537         Run(client_, code, fout, expand);
 538     }
 539
 540     if (append_history$ != NULL) {
 541         _syscall(close(_syscall(open(histfile, O_CREAT | O_WRONLY, 0600))));
 542         (*append_history$)(histlines, histfile);
 543     } else {
 544         write_history(histfile);
 545     }
 546
 547     fputs("\n", fout);
 548     fflush(fout);
 549 }
 550
 551 static void *Map(const char *path, size_t *psize) {
 552     int fd;
 553     _syscall(fd = open(path, O_RDONLY));
 554
 555     struct stat stat;
 556     _syscall(fstat(fd, &stat));
 557     size_t size(stat.st_size);
 558
 559     *psize = size;
 560
 561     void *base;
 562     _syscall(base = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0));
 563
 564     _syscall(close(fd));
 565     return base;
 566 }
 567
 568 void InjectLibrary(pid_t pid);
 569
 570 int Main(int argc, char const * const argv[], char const * const envp[]) {
 571     bool tty(isatty(STDIN_FILENO));
 572     bool compile(false);
 573     CYOptions options;
 574
 575     append_history$ = reinterpret_cast<int (*)(int, const char *)>(dlsym(RTLD_DEFAULT, "append_history"));
 576
 577 #ifdef CY_ATTACH
 578     pid_t pid(_not(pid_t));
 579 #endif
 580
 581     CYPool pool;
 582     apr_getopt_t *state;
 583     _aprcall(apr_getopt_init(&state, pool, argc, argv));
 584
 585     for (;;) {
 586         char opt;
 587         const char *arg;
 588
 589         apr_status_t status(apr_getopt(state,
 590             "cg:n:"
 591 #ifdef CY_ATTACH
 592             "p:"
 593 #endif
 594             "s"
 595         , &opt, &arg));
 596
 597         switch (status) {
 598             case APR_EOF:
 599                 goto getopt;
 600             case APR_BADCH:
 601             case APR_BADARG:
 602                 fprintf(stderr,
 603                     "usage: cycript [-c]"
 604 #ifdef CY_ATTACH
 605                     " [-p <pid|name>]"
 606 #endif
 607                     " [<script> [<arg>...]]\n"
 608                 );
 609                 return 1;
 610             default:
 611                 _aprcall(status);
 612         }
 613
 614         switch (opt) {
 615             case 'c':
 616                 compile = true;
 617             break;
 618
 619             case 'g':
 620                 if (false);
 621                 else if (strcmp(arg, "rename") == 0)
 622                     options.verbose_ = true;
 623 #if YYDEBUG
 624                 else if (strcmp(arg, "bison") == 0)
 625                     bison_ = true;
 626 #endif
 627                 else {
 628                     fprintf(stderr, "invalid name for -g\n");
 629                     return 1;
 630                 }
 631             break;
 632
 633             case 'n':
 634                 if (false);
 635                 else if (strcmp(arg, "minify") == 0)
 636                     pretty_ = true;
 637                 else {
 638                     fprintf(stderr, "invalid name for -n\n");
 639                     return 1;
 640                 }
 641             break;
 642
 643 #ifdef CY_ATTACH
 644             case 'p': {
 645                 size_t size(strlen(arg));
 646                 char *end;
 647
 648                 pid = strtoul(arg, &end, 0);
 649                 if (arg + size != end) {
 650                     // XXX: arg needs to be escaped in some horrendous way of doom
 651                     const char *command(apr_psprintf(pool, "ps axc|sed -e '/^ *[0-9]/{s/^ *\\([0-9]*\\)\\( *[^ ]*\\)\\{3\\} *-*\\([^ ]*\\)/\\3 \\1/;/^%s /{s/^[^ ]* //;q;};};d'", arg));
 652
 653                     if (FILE *pids = popen(command, "r")) {
 654                         char value[32];
 655                         size = 0;
 656
 657                         for (;;) {
 658                             size_t read(fread(value + size, 1, sizeof(value) - size, pids));
 659                             if (read == 0)
 660                                 break;
 661                             else {
 662                                 size += read;
 663                                 if (size == sizeof(value)) {
 664                                     pid = _not(pid_t);
 665                                     goto fail;
 666                                 }
 667                             }
 668                         }
 669
 670                       size:
 671                         if (size == 0)
 672                             goto fail;
 673                         if (value[size - 1] == '\n') {
 674                             --size;
 675                             goto size;
 676                         }
 677
 678                         value[size] = '\0';
 679                         size = strlen(value);
 680                         pid = strtoul(value, &end, 0);
 681                         if (value + size != end) fail:
 682                             pid = _not(pid_t);
 683                         _syscall(pclose(pids));
 684                     }
 685
 686                     if (pid == _not(pid_t)) {
 687                         fprintf(stderr, "invalid pid for -p\n");
 688                         return 1;
 689                     }
 690                 }
 691             } break;
 692 #endif
 693
 694             case 's':
 695                 strict_ = true;
 696             break;
 697         }
 698     } getopt:;
 699
 700     const char *script;
 701     int ind(state->ind);
 702
 703 #ifdef CY_ATTACH
 704     if (pid != _not(pid_t) && ind < argc - 1) {
 705         fprintf(stderr, "-p cannot set argv\n");
 706         return 1;
 707     }
 708
 709     if (pid != _not(pid_t) && compile) {
 710         fprintf(stderr, "-p conflicts with -c\n");
 711         return 1;
 712     }
 713 #endif
 714
 715     if (ind == argc)
 716         script = NULL;
 717     else {
 718 #ifdef CY_EXECUTE
 719         // XXX: const_cast?! wtf gcc :(
 720         CYSetArgs(argc - ind - 1, const_cast<const char **>(argv + ind + 1));
 721 #endif
 722         script = argv[ind];
 723         if (strcmp(script, "-") == 0)
 724             script = NULL;
 725     }
 726
 727 #ifdef CY_ATTACH
 728     if (pid != _not(pid_t) && script == NULL && !tty) {
 729         fprintf(stderr, "non-terminal attaching to remote console\n");
 730         return 1;
 731     }
 732 #endif
 733
 734 #ifdef CY_ATTACH
 735     if (pid == _not(pid_t))
 736         client_ = -1;
 737     else {
 738         int server(_syscall(socket(PF_UNIX, SOCK_STREAM, 0))); try {
 739             struct sockaddr_un address;
 740             memset(&address, 0, sizeof(address));
 741             address.sun_family = AF_UNIX;
 742
 743             sprintf(address.sun_path, "/tmp/.s.cy.%u", getpid());
 744
 745             _syscall(bind(server, reinterpret_cast<sockaddr *>(&address), SUN_LEN(&address)));
 746             _syscall(chmod(address.sun_path, 0777));
 747
 748             try {
 749                 _syscall(listen(server, 1));
 750                 InjectLibrary(pid);
 751                 client_ = _syscall(accept(server, NULL, NULL));
 752             } catch (...) {
 753                 // XXX: exception?
 754                 unlink(address.sun_path);
 755                 throw;
 756             }
 757         } catch (...) {
 758             _syscall(close(server));
 759             throw;
 760         }
 761     }
 762 #else
 763     client_ = -1;
 764 #endif
 765
 766     if (script == NULL && tty)
 767         Console(pool, options);
 768     else {
 769         CYDriver driver(pool, script ?: "<stdin>");
 770         cy::parser parser(driver);
 771         Setup(driver, parser);
 772
 773         char *start, *end;
 774
 775         if (script == NULL) {
 776             start = NULL;
 777             end = NULL;
 778
 779             driver.file_ = stdin;
 780         } else {
 781             size_t size;
 782             start = reinterpret_cast<char *>(Map(script, &size));
 783             end = start + size;
 784
 785             if (size >= 2 && start[0] == '#' && start[1] == '!') {
 786                 start += 2;
 787
 788                 if (void *line = memchr(start, '\n', end - start))
 789                     start = reinterpret_cast<char *>(line);
 790                 else
 791                     start = end;
 792             }
 793
 794             driver.data_ = start;
 795             driver.size_ = end - start;
 796         }
 797
 798         if (parser.parse() != 0 || !driver.errors_.empty()) {
 799             for (CYDriver::Errors::const_iterator i(driver.errors_.begin()); i != driver.errors_.end(); ++i)
 800                 std::cerr << i->location_.begin << ": " << i->message_ << std::endl;
 801         } else if (driver.program_ != NULL)
 802             if (client_ != -1) {
 803                 std::string code(start, end-start);
 804                 Run(client_, code, stdout);
 805             } else {
 806                 std::ostringstream str;
 807                 CYOutput out(str, options);
 808                 Setup(out, driver, options);
 809                 out << *driver.program_;
 810                 std::string code(str.str());
 811                 if (compile)
 812                     std::cout << code;
 813                 else
 814                     Run(client_, code, stdout);
 815             }
 816     }
 817
 818     return 0;
 819 }
 820
 821 int main(int argc, char const * const argv[], char const * const envp[]) {
 822     apr_status_t status(apr_app_initialize(&argc, &argv, &envp));
 823
 824     if (status != APR_SUCCESS) {
 825         fprintf(stderr, "apr_app_initialize() != APR_SUCCESS\n");
 826         return 1;
 827     } else try {
 828         return Main(argc, argv, envp);
 829     } catch (const CYException &error) {
 830         CYPool pool;
 831         fprintf(stderr, "%s\n", error.PoolCString(pool));
 832         return 1;
 833     }
 834 }