Console.cpp

   1 /* Cycript - Optimizing JavaScript Compiler/Runtime
   2  * Copyright (C) 2009-2010  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU Lesser General Public License, Version 3 {{{ */
   6 /*
   7  * Cycript is free software: you can redistribute it and/or modify it under
   8  * the terms of the GNU Lesser General Public License as published by the
   9  * Free Software Foundation, either version 3 of the License, or (at your
  10  * option) any later version.
  11  *
  12  * Cycript is distributed in the hope that it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
  15  * License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public License
  18  * along with Cycript.  If not, see <http://www.gnu.org/licenses/>.
  19 **/
  20 /* }}} */
  21
  22 #include "cycript.hpp"
  23
  24 #ifdef CY_EXECUTE
  25 #include "JavaScript.hpp"
  26 #endif
  27
  28 #include <cstdio>
  29 #include <sstream>
  30
  31 #include <setjmp.h>
  32
  33 #ifdef HAVE_READLINE_H
  34 #include <readline.h>
  35 #else
  36 #include <readline/readline.h>
  37 #endif
  38
  39 #ifdef HAVE_HISTORY_H
  40 #include <history.h>
  41 #else
  42 #include <readline/history.h>
  43 #endif
  44
  45 #include <sys/mman.h>
  46
  47 #include <errno.h>
  48 #include <unistd.h>
  49
  50 #include <sys/types.h>
  51 #include <sys/stat.h>
  52 #include <fcntl.h>
  53
  54 #include "Cycript.tab.hh"
  55
  56 #include <sys/types.h>
  57 #include <sys/socket.h>
  58 #include <netinet/in.h>
  59 #include <sys/un.h>
  60 #include <pwd.h>
  61
  62 #include <apr_getopt.h>
  63
  64 #include <dlfcn.h>
  65
  66 #include "Replace.hpp"
  67
  68 static volatile enum {
  69     Working,
  70     Parsing,
  71     Running,
  72     Sending,
  73     Waiting,
  74 } mode_;
  75
  76 static jmp_buf ctrlc_;
  77
  78 static void sigint(int) {
  79     switch (mode_) {
  80         case Working:
  81             return;
  82         case Parsing:
  83             longjmp(ctrlc_, 1);
  84         case Running:
  85             throw "*** Ctrl-C";
  86         case Sending:
  87             return;
  88         case Waiting:
  89             return;
  90     }
  91 }
  92
  93 #if YYDEBUG
  94 static bool bison_;
  95 #endif
  96 static bool strict_;
  97 static bool pretty_;
  98
  99 void Setup(CYDriver &driver, cy::parser &parser) {
 100 #if YYDEBUG
 101     if (bison_)
 102         parser.set_debug_level(1);
 103 #endif
 104     if (strict_)
 105         driver.strict_ = true;
 106 }
 107
 108 void Setup(CYOutput &out, CYDriver &driver, CYOptions &options) {
 109     out.pretty_ = pretty_;
 110     CYContext context(options);
 111     driver.program_->Replace(context);
 112 }
 113
 114 static CYUTF8String Run(CYPool &pool, int client, CYUTF8String code) {
 115     const char *json;
 116     size_t size;
 117
 118     if (client == -1) {
 119         mode_ = Running;
 120 #ifdef CY_EXECUTE
 121         json = CYExecute(pool, code);
 122 #else
 123         json = NULL;
 124 #endif
 125         mode_ = Working;
 126         if (json == NULL)
 127             size = 0;
 128         else
 129             size = strlen(json);
 130     } else {
 131         mode_ = Sending;
 132         size = code.size;
 133         CYSendAll(client, &size, sizeof(size));
 134         CYSendAll(client, code.data, code.size);
 135         mode_ = Waiting;
 136         CYRecvAll(client, &size, sizeof(size));
 137         if (size == _not(size_t))
 138             json = NULL;
 139         else {
 140             char *temp(new(pool) char[size + 1]);
 141             CYRecvAll(client, temp, size);
 142             temp[size] = '\0';
 143             json = temp;
 144         }
 145         mode_ = Working;
 146     }
 147
 148     return CYUTF8String(json, size);
 149 }
 150
 151 static CYUTF8String Run(CYPool &pool, int client, const std::string &code) {
 152     return Run(pool, client, CYUTF8String(code.c_str(), code.size()));
 153 }
 154
 155 FILE *fout_;
 156
 157 static void Output(CYUTF8String json, FILE *fout, bool expand = false) {
 158     const char *data(json.data);
 159     size_t size(json.size);
 160
 161     if (data == NULL || fout == NULL)
 162         return;
 163
 164     if (!expand || data[0] != '"' && data[0] != '\'')
 165         fputs(data, fout);
 166     else for (size_t i(0); i != size; ++i)
 167         if (data[i] != '\\')
 168             fputc(data[i], fout);
 169         else switch(data[++i]) {
 170             case '\0': goto done;
 171             case '\\': fputc('\\', fout); break;
 172             case '\'': fputc('\'', fout); break;
 173             case '"': fputc('"', fout); break;
 174             case 'b': fputc('\b', fout); break;
 175             case 'f': fputc('\f', fout); break;
 176             case 'n': fputc('\n', fout); break;
 177             case 'r': fputc('\r', fout); break;
 178             case 't': fputc('\t', fout); break;
 179             case 'v': fputc('\v', fout); break;
 180             default: fputc('\\', fout); --i; break;
 181         }
 182
 183   done:
 184     fputs("\n", fout);
 185     fflush(fout);
 186 }
 187
 188 static void Run(int client, const char *data, size_t size, FILE *fout = NULL, bool expand = false) {
 189     CYPool pool;
 190     Output(Run(pool, client, CYUTF8String(data, size)), fout, expand);
 191 }
 192
 193 static void Run(int client, std::string &code, FILE *fout = NULL, bool expand = false) {
 194     Run(client, code.c_str(), code.size(), fout, expand);
 195 }
 196
 197 int (*append_history$)(int, const char *);
 198
 199 static std::string command_;
 200
 201 static CYExpression *ParseExpression(CYUTF8String code) {
 202     std::ostringstream str;
 203     str << '(' << code << ')';
 204     std::string string(str.str());
 205
 206     CYDriver driver;
 207     driver.data_ = string.c_str();
 208     driver.size_ = string.size();
 209
 210     cy::parser parser(driver);
 211     Setup(driver, parser);
 212
 213     if (parser.parse() != 0 || !driver.errors_.empty())
 214         _assert(false);
 215
 216     CYExpress *express(dynamic_cast<CYExpress *>(driver.program_->statements_));
 217     _assert(express != NULL);
 218     return express->expression_;
 219 }
 220
 221 static int client_;
 222
 223 static char **Complete(const char *word, int start, int end) {
 224     rl_attempted_completion_over = TRUE;
 225
 226     CYLocalPool pool;
 227     CYDriver driver;
 228     cy::parser parser(driver);
 229     Setup(driver, parser);
 230
 231     std::string line(rl_line_buffer, start);
 232     std::string command(command_ + line);
 233
 234     driver.data_ = command.c_str();
 235     driver.size_ = command.size();
 236
 237     driver.auto_ = true;
 238
 239     if (parser.parse() != 0 || !driver.errors_.empty())
 240         return NULL;
 241
 242     if (driver.mode_ == CYDriver::AutoNone)
 243         return NULL;
 244
 245     CYExpression *expression;
 246
 247     CYOptions options;
 248     CYContext context(options);
 249
 250     std::ostringstream prefix;
 251
 252     switch (driver.mode_) {
 253         case CYDriver::AutoPrimary:
 254             expression = $ CYThis();
 255         break;
 256
 257         case CYDriver::AutoDirect:
 258             expression = driver.context_;
 259         break;
 260
 261         case CYDriver::AutoIndirect:
 262             expression = $ CYIndirect(driver.context_);
 263         break;
 264
 265         case CYDriver::AutoMessage: {
 266             CYDriver::Context &thing(driver.contexts_.back());
 267             expression = $M($M($ CYIndirect(thing.context_), $S("isa")), $S("messages"));
 268             for (CYDriver::Context::Words::const_iterator part(thing.words_.begin()); part != thing.words_.end(); ++part)
 269                 prefix << (*part)->word_ << ':';
 270         } break;
 271
 272         default:
 273             _assert(false);
 274     }
 275
 276     std::string begin(prefix.str());
 277
 278     driver.program_ = $ CYProgram($ CYExpress($C3(ParseExpression(
 279     "   function(object, prefix, word) {\n"
 280     "       var names = [];\n"
 281     "       var pattern = '^' + prefix + word;\n"
 282     "       var length = prefix.length;\n"
 283     "       for (name in object)\n"
 284     "           if (name.match(pattern) != null)\n"
 285     "               names.push(name.substr(length));\n"
 286     "       return names;\n"
 287     "   }\n"
 288     ), expression, $S(begin.c_str()), $S(word))));
 289
 290     driver.program_->Replace(context);
 291
 292     std::ostringstream str;
 293     CYOutput out(str, options);
 294     out << *driver.program_;
 295
 296     std::string code(str.str());
 297     CYUTF8String json(Run(pool, client_, code));
 298
 299     CYExpression *result(ParseExpression(json));
 300     CYArray *array(dynamic_cast<CYArray *>(result));
 301
 302     if (array == NULL) {
 303         fprintf(fout_, "\n");
 304         Output(json, fout_);
 305         rl_forced_update_display();
 306         return NULL;
 307     }
 308
 309     // XXX: use an std::set?
 310     typedef std::vector<std::string> Completions;
 311     Completions completions;
 312
 313     std::string common;
 314     bool rest(false);
 315
 316     CYForEach (element, array->elements_) {
 317         CYString *string(dynamic_cast<CYString *>(element->value_));
 318         _assert(string != NULL);
 319
 320         std::string completion;
 321         if (string->size_ != 0)
 322             completion.assign(string->value_, string->size_);
 323         else if (driver.mode_ == CYDriver::AutoMessage)
 324             completion = "]";
 325         else
 326             continue;
 327
 328         completions.push_back(completion);
 329
 330         if (!rest) {
 331             common = completion;
 332             rest = true;
 333         } else {
 334             size_t limit(completion.size()), size(common.size());
 335             if (size > limit)
 336                 common = common.substr(0, limit);
 337             else
 338                 limit = size;
 339             for (limit = 0; limit != size; ++limit)
 340                 if (common[limit] != completion[limit])
 341                     break;
 342             if (limit != size)
 343                 common = common.substr(0, limit);
 344         }
 345     }
 346
 347     size_t count(completions.size());
 348     if (count == 0)
 349         return NULL;
 350
 351     size_t colon(common.find(':'));
 352     if (colon != std::string::npos)
 353         common = common.substr(0, colon + 1);
 354     if (completions.size() == 1)
 355         common += ' ';
 356
 357     char **results(reinterpret_cast<char **>(malloc(sizeof(char *) * (count + 2))));
 358
 359     results[0] = strdup(common.c_str());
 360     size_t index(0);
 361     for (Completions::const_iterator i(completions.begin()); i != completions.end(); ++i)
 362         results[++index] = strdup(i->c_str());
 363     results[count + 1] = NULL;
 364
 365     return results;
 366 }
 367
 368 // need char *, not const char *
 369 static char name_[] = "cycript";
 370 static char break_[] = " \t\n\"\\'`@$><=;|&{(" ")}" ".:[]";
 371
 372 static void Console(CYOptions &options) {
 373     CYPool pool;
 374
 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     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             CYLocalPool pool;
 475             CYDriver driver;
 476             cy::parser parser(driver);
 477             Setup(driver, parser);
 478
 479             driver.data_ = command_.c_str();
 480             driver.size_ = command_.size();
 481
 482             if (parser.parse() != 0 || !driver.errors_.empty()) {
 483                 for (CYDriver::Errors::const_iterator error(driver.errors_.begin()); error != driver.errors_.end(); ++error) {
 484                     cy::position begin(error->location_.begin);
 485                     if (begin.line != lines.size() || begin.column < lines.back().size() || error->warning_) {
 486                         cy::position end(error->location_.end);
 487
 488                         if (begin.line != lines.size()) {
 489                             std::cerr << "  | ";
 490                             std::cerr << lines[begin.line - 1] << std::endl;
 491                         }
 492
 493                         std::cerr << "....";
 494                         for (size_t i(0); i != begin.column - 1; ++i)
 495                             std::cerr << '.';
 496                         if (begin.line != end.line || begin.column == end.column)
 497                             std::cerr << '^';
 498                         else for (size_t i(0), e(end.column - begin.column); i != e; ++i)
 499                             std::cerr << '^';
 500                         std::cerr << std::endl;
 501
 502                         std::cerr << "  | ";
 503                         std::cerr << error->message_ << std::endl;
 504
 505                         add_history(command_.c_str());
 506                         ++histlines;
 507                         goto restart;
 508                     }
 509                 }
 510
 511                 driver.errors_.clear();
 512
 513                 command_ += '\n';
 514                 prompt = "cy> ";
 515                 goto read;
 516             }
 517
 518             if (driver.program_ == NULL)
 519                 goto restart;
 520
 521             if (client_ != -1)
 522                 code = command_;
 523             else {
 524                 std::ostringstream str;
 525                 CYOutput out(str, options);
 526                 Setup(out, driver, options);
 527                 out << *driver.program_;
 528                 code = str.str();
 529             }
 530         }
 531
 532         add_history(command_.c_str());
 533         ++histlines;
 534
 535         if (debug)
 536             std::cout << code << std::endl;
 537
 538         Run(client_, code, fout_, expand);
 539     }
 540
 541     if (append_history$ != NULL) {
 542         _syscall(close(_syscall(open(histfile, O_CREAT | O_WRONLY, 0600))));
 543         (*append_history$)(histlines, histfile);
 544     } else {
 545         write_history(histfile);
 546     }
 547
 548     fputs("\n", fout_);
 549     fflush(fout_);
 550 }
 551
 552 static void *Map(const char *path, size_t *psize) {
 553     int fd;
 554     _syscall(fd = open(path, O_RDONLY));
 555
 556     struct stat stat;
 557     _syscall(fstat(fd, &stat));
 558     size_t size(stat.st_size);
 559
 560     *psize = size;
 561
 562     void *base;
 563     _syscall(base = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0));
 564
 565     _syscall(close(fd));
 566     return base;
 567 }
 568
 569 void InjectLibrary(pid_t pid);
 570
 571 int Main(int argc, char const * const argv[], char const * const envp[]) {
 572     bool tty(isatty(STDIN_FILENO));
 573     bool compile(false);
 574     CYOptions options;
 575
 576     append_history$ = (int (*)(int, const char *)) (dlsym(RTLD_DEFAULT, "append_history"));
 577
 578 #ifdef CY_ATTACH
 579     pid_t pid(_not(pid_t));
 580 #endif
 581
 582     CYPool pool;
 583     apr_getopt_t *state;
 584     _aprcall(apr_getopt_init(&state, pool, argc, argv));
 585
 586     for (;;) {
 587         char opt;
 588         const char *arg;
 589
 590         apr_status_t status(apr_getopt(state,
 591             "cg:n:"
 592 #ifdef CY_ATTACH
 593             "p:"
 594 #endif
 595             "s"
 596         , &opt, &arg));
 597
 598         switch (status) {
 599             case APR_EOF:
 600                 goto getopt;
 601             case APR_BADCH:
 602             case APR_BADARG:
 603                 fprintf(stderr,
 604                     "usage: cycript [-c]"
 605 #ifdef CY_ATTACH
 606                     " [-p <pid|name>]"
 607 #endif
 608                     " [<script> [<arg>...]]\n"
 609                 );
 610                 return 1;
 611             default:
 612                 _aprcall(status);
 613         }
 614
 615         switch (opt) {
 616             case 'c':
 617                 compile = true;
 618             break;
 619
 620             case 'g':
 621                 if (false);
 622                 else if (strcmp(arg, "rename") == 0)
 623                     options.verbose_ = true;
 624 #if YYDEBUG
 625                 else if (strcmp(arg, "bison") == 0)
 626                     bison_ = true;
 627 #endif
 628                 else {
 629                     fprintf(stderr, "invalid name for -g\n");
 630                     return 1;
 631                 }
 632             break;
 633
 634             case 'n':
 635                 if (false);
 636                 else if (strcmp(arg, "minify") == 0)
 637                     pretty_ = true;
 638                 else {
 639                     fprintf(stderr, "invalid name for -n\n");
 640                     return 1;
 641                 }
 642             break;
 643
 644 #ifdef CY_ATTACH
 645             case 'p': {
 646                 size_t size(strlen(arg));
 647                 char *end;
 648
 649                 pid = strtoul(arg, &end, 0);
 650                 if (arg + size != end) {
 651                     // XXX: arg needs to be escaped in some horrendous way of doom
 652                     const char *command(apr_psprintf(pool, "ps axc|sed -e '/^ *[0-9]/{s/^ *\\([0-9]*\\)\\( *[^ ]*\\)\\{3\\} *-*\\([^ ]*\\)/\\3 \\1/;/^%s /{s/^[^ ]* //;q;};};d'", arg));
 653
 654                     if (FILE *pids = popen(command, "r")) {
 655                         char value[32];
 656                         size = 0;
 657
 658                         for (;;) {
 659                             size_t read(fread(value + size, 1, sizeof(value) - size, pids));
 660                             if (read == 0)
 661                                 break;
 662                             else {
 663                                 size += read;
 664                                 if (size == sizeof(value)) {
 665                                     pid = _not(pid_t);
 666                                     goto fail;
 667                                 }
 668                             }
 669                         }
 670
 671                       size:
 672                         if (size == 0)
 673                             goto fail;
 674                         if (value[size - 1] == '\n') {
 675                             --size;
 676                             goto size;
 677                         }
 678
 679                         value[size] = '\0';
 680                         size = strlen(value);
 681                         pid = strtoul(value, &end, 0);
 682                         if (value + size != end) fail:
 683                             pid = _not(pid_t);
 684                         _syscall(pclose(pids));
 685                     }
 686
 687                     if (pid == _not(pid_t)) {
 688                         fprintf(stderr, "invalid pid for -p\n");
 689                         return 1;
 690                     }
 691                 }
 692             } break;
 693 #endif
 694
 695             case 's':
 696                 strict_ = true;
 697             break;
 698         }
 699     } getopt:;
 700
 701     const char *script;
 702     int ind(state->ind);
 703
 704 #ifdef CY_ATTACH
 705     if (pid != _not(pid_t) && ind < argc - 1) {
 706         fprintf(stderr, "-p cannot set argv\n");
 707         return 1;
 708     }
 709
 710     if (pid != _not(pid_t) && compile) {
 711         fprintf(stderr, "-p conflicts with -c\n");
 712         return 1;
 713     }
 714 #endif
 715
 716     if (ind == argc)
 717         script = NULL;
 718     else {
 719 #ifdef CY_EXECUTE
 720         // XXX: const_cast?! wtf gcc :(
 721         CYSetArgs(argc - ind - 1, const_cast<const char **>(argv + ind + 1));
 722 #endif
 723         script = argv[ind];
 724         if (strcmp(script, "-") == 0)
 725             script = NULL;
 726     }
 727
 728 #ifdef CY_ATTACH
 729     if (pid != _not(pid_t) && script == NULL && !tty) {
 730         fprintf(stderr, "non-terminal attaching to remote console\n");
 731         return 1;
 732     }
 733 #endif
 734
 735 #ifdef CY_ATTACH
 736     if (pid == _not(pid_t))
 737         client_ = -1;
 738     else {
 739         int server(_syscall(socket(PF_UNIX, SOCK_STREAM, 0))); try {
 740             struct sockaddr_un address;
 741             memset(&address, 0, sizeof(address));
 742             address.sun_family = AF_UNIX;
 743
 744             sprintf(address.sun_path, "/tmp/.s.cy.%u", getpid());
 745
 746             _syscall(bind(server, reinterpret_cast<sockaddr *>(&address), SUN_LEN(&address)));
 747             _syscall(chmod(address.sun_path, 0777));
 748
 749             try {
 750                 _syscall(listen(server, 1));
 751                 InjectLibrary(pid);
 752                 client_ = _syscall(accept(server, NULL, NULL));
 753             } catch (...) {
 754                 // XXX: exception?
 755                 unlink(address.sun_path);
 756                 throw;
 757             }
 758         } catch (...) {
 759             _syscall(close(server));
 760             throw;
 761         }
 762     }
 763 #else
 764     client_ = -1;
 765 #endif
 766
 767     if (script == NULL && tty)
 768         Console(options);
 769     else {
 770         CYLocalPool pool;
 771         CYDriver driver(script ?: "<stdin>");
 772         cy::parser parser(driver);
 773         Setup(driver, parser);
 774
 775         char *start, *end;
 776
 777         if (script == NULL) {
 778             start = NULL;
 779             end = NULL;
 780
 781             driver.file_ = stdin;
 782         } else {
 783             size_t size;
 784             start = reinterpret_cast<char *>(Map(script, &size));
 785             end = start + size;
 786
 787             if (size >= 2 && start[0] == '#' && start[1] == '!') {
 788                 start += 2;
 789
 790                 if (void *line = memchr(start, '\n', end - start))
 791                     start = reinterpret_cast<char *>(line);
 792                 else
 793                     start = end;
 794             }
 795
 796             driver.data_ = start;
 797             driver.size_ = end - start;
 798         }
 799
 800         if (parser.parse() != 0 || !driver.errors_.empty()) {
 801             for (CYDriver::Errors::const_iterator i(driver.errors_.begin()); i != driver.errors_.end(); ++i)
 802                 std::cerr << i->location_.begin << ": " << i->message_ << std::endl;
 803         } else if (driver.program_ != NULL)
 804             if (client_ != -1) {
 805                 std::string code(start, end-start);
 806                 Run(client_, code, stdout);
 807             } else {
 808                 std::ostringstream str;
 809                 CYOutput out(str, options);
 810                 Setup(out, driver, options);
 811                 out << *driver.program_;
 812                 std::string code(str.str());
 813                 if (compile)
 814                     std::cout << code;
 815                 else
 816                     Run(client_, code, stdout);
 817             }
 818     }
 819
 820     return 0;
 821 }
 822
 823 int main(int argc, char const * const argv[], char const * const envp[]) {
 824     apr_status_t status(apr_app_initialize(&argc, &argv, &envp));
 825
 826     if (status != APR_SUCCESS) {
 827         fprintf(stderr, "apr_app_initialize() != APR_SUCCESS\n");
 828         return 1;
 829     } else try {
 830         return Main(argc, argv, envp);
 831     } catch (const CYException &error) {
 832         CYPool pool;
 833         fprintf(stderr, "%s\n", error.PoolCString(pool));
 834         return 1;
 835     }
 836 }