Console.cpp

   1 /* Cycript - Optimizing JavaScript Compiler/Runtime
   2  * Copyright (C) 2009-2012  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 static std::ostream *out_;
 156
 157 static void Output(CYUTF8String json, std::ostream *out, bool expand = false) {
 158     const char *data(json.data);
 159     size_t size(json.size);
 160
 161     if (data == NULL || out == NULL)
 162         return;
 163
 164     if (!expand ||
 165         data[0] != '@' && data[0] != '"' && data[0] != '\'' ||
 166         data[0] == '@' && data[1] != '"' && data[1] != '\''
 167     )
 168         out->write(data, size);
 169     else for (size_t i(0); i != size; ++i)
 170         if (data[i] != '\\')
 171             *out << data[i];
 172         else switch(data[++i]) {
 173             case '\0': goto done;
 174             case '\\': *out << '\\'; break;
 175             case '\'': *out << '\''; break;
 176             case '"': *out << '"'; break;
 177             case 'b': *out << '\b'; break;
 178             case 'f': *out << '\f'; break;
 179             case 'n': *out << '\n'; break;
 180             case 'r': *out << '\r'; break;
 181             case 't': *out << '\t'; break;
 182             case 'v': *out << '\v'; break;
 183             default: *out << '\\'; --i; break;
 184         }
 185
 186   done:
 187     *out << std::endl;
 188 }
 189
 190 static void Run(int client, const char *data, size_t size, std::ostream *out = NULL, bool expand = false) {
 191     CYPool pool;
 192     Output(Run(pool, client, CYUTF8String(data, size)), out, expand);
 193 }
 194
 195 static void Run(int client, std::string &code, std::ostream *out = NULL, bool expand = false) {
 196     Run(client, code.c_str(), code.size(), out, expand);
 197 }
 198
 199 int (*append_history$)(int, const char *);
 200
 201 static std::string command_;
 202
 203 static CYExpression *ParseExpression(CYUTF8String code) {
 204     std::stringstream stream;
 205     stream << '(' << code << ')';
 206     CYDriver driver(stream);
 207
 208     cy::parser parser(driver);
 209     Setup(driver, parser);
 210
 211     if (parser.parse() != 0 || !driver.errors_.empty())
 212         return NULL;
 213
 214     CYOptions options;
 215     CYContext context(options);
 216
 217     // XXX: this could be replaced with a CYStatement::Primitive()
 218     if (CYExpress *express = dynamic_cast<CYExpress *>(driver.program_->statements_))
 219         return express->expression_->Primitive(context);
 220
 221     return NULL;
 222 }
 223
 224 static int client_;
 225
 226 static char **Complete(const char *word, int start, int end) {
 227     rl_attempted_completion_over = TRUE;
 228
 229     CYLocalPool pool;
 230
 231     std::string line(rl_line_buffer, start);
 232     std::istringstream stream(command_ + line);
 233     CYDriver driver(stream);
 234
 235     driver.auto_ = true;
 236
 237     cy::parser parser(driver);
 238     Setup(driver, parser);
 239
 240     if (parser.parse() != 0 || !driver.errors_.empty())
 241         return NULL;
 242
 243     if (driver.mode_ == CYDriver::AutoNone)
 244         return NULL;
 245
 246     CYExpression *expression;
 247
 248     CYOptions options;
 249     CYContext context(options);
 250
 251     std::ostringstream prefix;
 252
 253     switch (driver.mode_) {
 254         case CYDriver::AutoPrimary:
 255             expression = $ CYThis();
 256         break;
 257
 258         case CYDriver::AutoDirect:
 259             expression = driver.context_;
 260         break;
 261
 262         case CYDriver::AutoIndirect:
 263             expression = $ CYIndirect(driver.context_);
 264         break;
 265
 266         case CYDriver::AutoMessage: {
 267             CYDriver::Context &thing(driver.contexts_.back());
 268             expression = $M($C1($V("object_getClass"), thing.context_), $S("messages"));
 269             for (CYDriver::Context::Words::const_iterator part(thing.words_.begin()); part != thing.words_.end(); ++part)
 270                 prefix << (*part)->word_ << ':';
 271         } break;
 272
 273         default:
 274             _assert(false);
 275     }
 276
 277     std::string begin(prefix.str());
 278
 279     driver.program_ = $ CYProgram($ CYExpress($C3(ParseExpression(
 280     "   function(object, prefix, word) {\n"
 281     "       var names = [];\n"
 282     "       var before = prefix.length;\n"
 283     "       prefix += word;\n"
 284     "       var entire = prefix.length;\n"
 285     "       for (name in object)\n"
 286     "           if (name.substring(0, entire) == prefix)\n"
 287     "               names.push(name.substr(before));\n"
 288     "       return names;\n"
 289     "   }\n"
 290     ), expression, $S(begin.c_str()), $S(word))));
 291
 292     driver.program_->Replace(context);
 293
 294     std::ostringstream str;
 295     CYOutput out(str, options);
 296     out << *driver.program_;
 297
 298     std::string code(str.str());
 299     CYUTF8String json(Run(pool, client_, code));
 300     // XXX: if this fails we should not try to parse it
 301
 302     CYExpression *result(ParseExpression(json));
 303     if (result == NULL)
 304         return NULL;
 305
 306     CYArray *array(dynamic_cast<CYArray *>(result));
 307
 308     if (array == NULL) {
 309         *out_ << '\n';
 310         Output(json, out_);
 311         rl_forced_update_display();
 312         return NULL;
 313     }
 314
 315     // XXX: use an std::set?
 316     typedef std::vector<std::string> Completions;
 317     Completions completions;
 318
 319     std::string common;
 320     bool rest(false);
 321
 322     CYForEach (element, array->elements_) {
 323         CYString *string(dynamic_cast<CYString *>(element->value_));
 324         _assert(string != NULL);
 325
 326         std::string completion;
 327         if (string->size_ != 0)
 328             completion.assign(string->value_, string->size_);
 329         else if (driver.mode_ == CYDriver::AutoMessage)
 330             completion = "]";
 331         else
 332             continue;
 333
 334         completions.push_back(completion);
 335
 336         if (!rest) {
 337             common = completion;
 338             rest = true;
 339         } else {
 340             size_t limit(completion.size()), size(common.size());
 341             if (size > limit)
 342                 common = common.substr(0, limit);
 343             else
 344                 limit = size;
 345             for (limit = 0; limit != size; ++limit)
 346                 if (common[limit] != completion[limit])
 347                     break;
 348             if (limit != size)
 349                 common = common.substr(0, limit);
 350         }
 351     }
 352
 353     size_t count(completions.size());
 354     if (count == 0)
 355         return NULL;
 356
 357     size_t colon(common.find(':'));
 358     if (colon != std::string::npos)
 359         common = common.substr(0, colon + 1);
 360     if (completions.size() == 1)
 361         common += ' ';
 362
 363     char **results(reinterpret_cast<char **>(malloc(sizeof(char *) * (count + 2))));
 364
 365     results[0] = strdup(common.c_str());
 366     size_t index(0);
 367     for (Completions::const_iterator i(completions.begin()); i != completions.end(); ++i)
 368         results[++index] = strdup(i->c_str());
 369     results[count + 1] = NULL;
 370
 371     return results;
 372 }
 373
 374 // need char *, not const char *
 375 static char name_[] = "cycript";
 376 static char break_[] = " \t\n\"\\'`@$><=;|&{(" ")}" ".:[]";
 377
 378 static void Console(CYOptions &options) {
 379     CYPool pool;
 380
 381     passwd *passwd;
 382     if (const char *username = getenv("LOGNAME"))
 383         passwd = getpwnam(username);
 384     else
 385         passwd = getpwuid(getuid());
 386
 387     const char *basedir(apr_psprintf(pool, "%s/.cycript", passwd->pw_dir));
 388     const char *histfile(apr_psprintf(pool, "%s/history", basedir));
 389     size_t histlines(0);
 390
 391     rl_initialize();
 392     rl_readline_name = name_;
 393
 394     mkdir(basedir, 0700);
 395     read_history(histfile);
 396
 397     bool bypass(false);
 398     bool debug(false);
 399     bool expand(false);
 400
 401     out_ = &std::cout;
 402
 403     // rl_completer_word_break_characters is broken in libedit
 404     rl_basic_word_break_characters = break_;
 405
 406     rl_completer_word_break_characters = break_;
 407     rl_attempted_completion_function = &Complete;
 408     rl_bind_key('\t', rl_complete);
 409
 410     struct sigaction action;
 411     sigemptyset(&action.sa_mask);
 412     action.sa_handler = &sigint;
 413     action.sa_flags = 0;
 414     sigaction(SIGINT, &action, NULL);
 415
 416     restart: for (;;) {
 417         command_.clear();
 418         std::vector<std::string> lines;
 419
 420         bool extra(false);
 421         const char *prompt("cy# ");
 422
 423         if (setjmp(ctrlc_) != 0) {
 424             mode_ = Working;
 425             *out_ << std::endl;
 426             goto restart;
 427         }
 428
 429       read:
 430         mode_ = Parsing;
 431         char *line(readline(prompt));
 432         mode_ = Working;
 433         if (line == NULL)
 434             break;
 435         if (line[0] == '\0')
 436             goto read;
 437
 438         if (!extra) {
 439             extra = true;
 440             if (line[0] == '?') {
 441                 std::string data(line + 1);
 442                 if (data == "bypass") {
 443                     bypass = !bypass;
 444                     *out_ << "bypass == " << (bypass ? "true" : "false") << std::endl;
 445                 } else if (data == "debug") {
 446                     debug = !debug;
 447                     *out_ << "debug == " << (debug ? "true" : "false") << std::endl;
 448                 } else if (data == "expand") {
 449                     expand = !expand;
 450                     *out_ << "expand == " << (expand ? "true" : "false") << std::endl;
 451                 }
 452                 add_history(line);
 453                 ++histlines;
 454                 goto restart;
 455             }
 456         }
 457
 458         command_ += line;
 459
 460         char *begin(line), *end(line + strlen(line));
 461         while (char *nl = reinterpret_cast<char *>(memchr(begin, '\n', end - begin))) {
 462             *nl = '\0';
 463             lines.push_back(begin);
 464             begin = nl + 1;
 465         }
 466
 467         lines.push_back(begin);
 468
 469         free(line);
 470
 471         std::string code;
 472
 473         if (bypass)
 474             code = command_;
 475         else {
 476             CYLocalPool pool;
 477
 478             std::istringstream stream(command_);
 479             CYDriver driver(stream);
 480
 481             cy::parser parser(driver);
 482             Setup(driver, parser);
 483
 484             if (parser.parse() != 0 || !driver.errors_.empty()) {
 485                 for (CYDriver::Errors::const_iterator error(driver.errors_.begin()); error != driver.errors_.end(); ++error) {
 486                     cy::position begin(error->location_.begin);
 487                     if (begin.line != lines.size() || begin.column < lines.back().size() || error->warning_) {
 488                         cy::position end(error->location_.end);
 489
 490                         if (begin.line != lines.size()) {
 491                             std::cerr << "  | ";
 492                             std::cerr << lines[begin.line - 1] << std::endl;
 493                         }
 494
 495                         std::cerr << "....";
 496                         for (size_t i(0); i != begin.column; ++i)
 497                             std::cerr << '.';
 498                         if (begin.line != end.line || begin.column == end.column)
 499                             std::cerr << '^';
 500                         else for (size_t i(0), e(end.column - begin.column); i != e; ++i)
 501                             std::cerr << '^';
 502                         std::cerr << std::endl;
 503
 504                         std::cerr << "  | ";
 505                         std::cerr << error->message_ << std::endl;
 506
 507                         add_history(command_.c_str());
 508                         ++histlines;
 509                         goto restart;
 510                     }
 511                 }
 512
 513                 driver.errors_.clear();
 514
 515                 command_ += '\n';
 516                 prompt = "cy> ";
 517                 goto read;
 518             }
 519
 520             if (driver.program_ == NULL)
 521                 goto restart;
 522
 523             if (client_ != -1)
 524                 code = command_;
 525             else {
 526                 std::ostringstream str;
 527                 CYOutput out(str, options);
 528                 Setup(out, driver, options);
 529                 out << *driver.program_;
 530                 code = str.str();
 531             }
 532         }
 533
 534         add_history(command_.c_str());
 535         ++histlines;
 536
 537         if (debug)
 538             std::cout << code << std::endl;
 539
 540         Run(client_, code, out_, expand);
 541     }
 542
 543     if (append_history$ != NULL) {
 544         _syscall(close(_syscall(open(histfile, O_CREAT | O_WRONLY, 0600))));
 545         (*append_history$)(histlines, histfile);
 546     } else {
 547         write_history(histfile);
 548     }
 549
 550     *out_ << std::endl;
 551 }
 552
 553 static void *Map(const char *path, size_t *psize) {
 554     int fd;
 555     _syscall(fd = open(path, O_RDONLY));
 556
 557     struct stat stat;
 558     _syscall(fstat(fd, &stat));
 559     size_t size(stat.st_size);
 560
 561     *psize = size;
 562
 563     void *base;
 564     _syscall(base = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0));
 565
 566     _syscall(close(fd));
 567     return base;
 568 }
 569
 570 void InjectLibrary(pid_t pid);
 571
 572 int Main(int argc, char const * const argv[], char const * const envp[]) {
 573     bool tty(isatty(STDIN_FILENO));
 574     bool compile(false);
 575     CYOptions options;
 576
 577     append_history$ = (int (*)(int, const char *)) (dlsym(RTLD_DEFAULT, "append_history"));
 578
 579 #ifdef CY_ATTACH
 580     pid_t pid(_not(pid_t));
 581 #endif
 582
 583     CYPool pool;
 584     apr_getopt_t *state;
 585     _aprcall(apr_getopt_init(&state, pool, argc, argv));
 586
 587     for (;;) {
 588         char opt;
 589         const char *arg;
 590
 591         apr_status_t status(apr_getopt(state,
 592             "cg:n:"
 593 #ifdef CY_ATTACH
 594             "p:"
 595 #endif
 596             "s"
 597         , &opt, &arg));
 598
 599         switch (status) {
 600             case APR_EOF:
 601                 goto getopt;
 602             case APR_BADCH:
 603             case APR_BADARG:
 604                 fprintf(stderr,
 605                     "usage: cycript [-c]"
 606 #ifdef CY_ATTACH
 607                     " [-p <pid|name>]"
 608 #endif
 609                     " [<script> [<arg>...]]\n"
 610                 );
 611                 return 1;
 612             default:
 613                 _aprcall(status);
 614         }
 615
 616         switch (opt) {
 617             case 'c':
 618                 compile = true;
 619             break;
 620
 621             case 'g':
 622                 if (false);
 623                 else if (strcmp(arg, "rename") == 0)
 624                     options.verbose_ = true;
 625 #if YYDEBUG
 626                 else if (strcmp(arg, "bison") == 0)
 627                     bison_ = true;
 628 #endif
 629                 else {
 630                     fprintf(stderr, "invalid name for -g\n");
 631                     return 1;
 632                 }
 633             break;
 634
 635             case 'n':
 636                 if (false);
 637                 else if (strcmp(arg, "minify") == 0)
 638                     pretty_ = true;
 639                 else {
 640                     fprintf(stderr, "invalid name for -n\n");
 641                     return 1;
 642                 }
 643             break;
 644
 645 #ifdef CY_ATTACH
 646             case 'p': {
 647                 size_t size(strlen(arg));
 648                 char *end;
 649
 650                 pid = strtoul(arg, &end, 0);
 651                 if (arg + size != end) {
 652                     // XXX: arg needs to be escaped in some horrendous way of doom
 653                     const char *command(apr_psprintf(pool, "ps axc|sed -e '/^ *[0-9]/{s/^ *\\([0-9]*\\)\\( *[^ ]*\\)\\{3\\} *-*\\([^ ]*\\)/\\3 \\1/;/^%s /{s/^[^ ]* //;q;};};d'", arg));
 654
 655                     if (FILE *pids = popen(command, "r")) {
 656                         char value[32];
 657                         size = 0;
 658
 659                         for (;;) {
 660                             size_t read(fread(value + size, 1, sizeof(value) - size, pids));
 661                             if (read == 0)
 662                                 break;
 663                             else {
 664                                 size += read;
 665                                 if (size == sizeof(value)) {
 666                                     pid = _not(pid_t);
 667                                     goto fail;
 668                                 }
 669                             }
 670                         }
 671
 672                       size:
 673                         if (size == 0)
 674                             goto fail;
 675                         if (value[size - 1] == '\n') {
 676                             --size;
 677                             goto size;
 678                         }
 679
 680                         value[size] = '\0';
 681                         size = strlen(value);
 682                         pid = strtoul(value, &end, 0);
 683                         if (value + size != end) fail:
 684                             pid = _not(pid_t);
 685                         _syscall(pclose(pids));
 686                     }
 687
 688                     if (pid == _not(pid_t)) {
 689                         fprintf(stderr, "invalid pid for -p\n");
 690                         return 1;
 691                     }
 692                 }
 693             } break;
 694 #endif
 695
 696             case 's':
 697                 strict_ = true;
 698             break;
 699         }
 700     } getopt:;
 701
 702     const char *script;
 703     int ind(state->ind);
 704
 705 #ifdef CY_ATTACH
 706     if (pid != _not(pid_t) && ind < argc - 1) {
 707         fprintf(stderr, "-p cannot set argv\n");
 708         return 1;
 709     }
 710
 711     if (pid != _not(pid_t) && compile) {
 712         fprintf(stderr, "-p conflicts with -c\n");
 713         return 1;
 714     }
 715 #endif
 716
 717     if (ind == argc)
 718         script = NULL;
 719     else {
 720 #ifdef CY_EXECUTE
 721         // XXX: const_cast?! wtf gcc :(
 722         CYSetArgs(argc - ind - 1, const_cast<const char **>(argv + ind + 1));
 723 #endif
 724         script = argv[ind];
 725         if (strcmp(script, "-") == 0)
 726             script = NULL;
 727     }
 728
 729 #ifdef CY_ATTACH
 730     if (pid != _not(pid_t) && script == NULL && !tty) {
 731         fprintf(stderr, "non-terminal attaching to remote console\n");
 732         return 1;
 733     }
 734 #endif
 735
 736 #ifdef CY_ATTACH
 737     if (pid == _not(pid_t))
 738         client_ = -1;
 739     else {
 740         int server(_syscall(socket(PF_UNIX, SOCK_STREAM, 0))); try {
 741             struct sockaddr_un address;
 742             memset(&address, 0, sizeof(address));
 743             address.sun_family = AF_UNIX;
 744
 745             sprintf(address.sun_path, "/tmp/.s.cy.%u", getpid());
 746
 747             _syscall(bind(server, reinterpret_cast<sockaddr *>(&address), SUN_LEN(&address)));
 748             _syscall(chmod(address.sun_path, 0777));
 749
 750             try {
 751                 _syscall(listen(server, 1));
 752                 InjectLibrary(pid);
 753                 client_ = _syscall(accept(server, NULL, NULL));
 754             } catch (...) {
 755                 // XXX: exception?
 756                 unlink(address.sun_path);
 757                 throw;
 758             }
 759         } catch (...) {
 760             _syscall(close(server));
 761             throw;
 762         }
 763     }
 764 #else
 765     client_ = -1;
 766 #endif
 767
 768     if (script == NULL && tty)
 769         Console(options);
 770     else {
 771         CYLocalPool pool;
 772
 773         char *start, *end;
 774         std::istream *indirect;
 775
 776         if (script == NULL) {
 777             start = NULL;
 778             end = NULL;
 779             indirect = &std::cin;
 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             indirect = NULL;
 795         }
 796
 797         CYStream direct(start, end);
 798         std::istream &stream(indirect == NULL ? direct : *indirect);
 799         CYDriver driver(stream, script ?: "<stdin>");
 800
 801         cy::parser parser(driver);
 802         Setup(driver, parser);
 803
 804         if (parser.parse() != 0 || !driver.errors_.empty()) {
 805             for (CYDriver::Errors::const_iterator i(driver.errors_.begin()); i != driver.errors_.end(); ++i)
 806                 std::cerr << i->location_.begin << ": " << i->message_ << std::endl;
 807         } else if (driver.program_ != NULL)
 808             if (client_ != -1) {
 809                 // XXX: this code means that you can't pipe to another process
 810                 std::string code(start, end-start);
 811                 Run(client_, code, &std::cout);
 812             } else {
 813                 std::ostringstream str;
 814                 CYOutput out(str, options);
 815                 Setup(out, driver, options);
 816                 out << *driver.program_;
 817                 std::string code(str.str());
 818                 if (compile)
 819                     std::cout << code;
 820                 else
 821                     Run(client_, code, &std::cout);
 822             }
 823     }
 824
 825     return 0;
 826 }
 827
 828 int main(int argc, char const * const argv[], char const * const envp[]) {
 829     apr_status_t status(apr_app_initialize(&argc, &argv, &envp));
 830
 831     if (status != APR_SUCCESS) {
 832         fprintf(stderr, "apr_app_initialize() != APR_SUCCESS\n");
 833         return 1;
 834     } else try {
 835         return Main(argc, argv, envp);
 836     } catch (const CYException &error) {
 837         CYPool pool;
 838         fprintf(stderr, "%s\n", error.PoolCString(pool));
 839         return 1;
 840     }
 841 }