Console.cpp

   1 /* Cycript - Optimizing JavaScript Compiler/Runtime
   2  * Copyright (C) 2009-2014  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU Affero General Public License, Version 3 {{{ */
   6 /*
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as published by
   9  * the Free Software Foundation, either version 3 of the License, or
  10  * (at your option) any later version.
  11
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  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 <fstream>
  30 #include <sstream>
  31
  32 #include <setjmp.h>
  33
  34 #ifdef HAVE_READLINE_H
  35 #include <readline.h>
  36 #else
  37 #include <readline/readline.h>
  38 #endif
  39
  40 #ifdef HAVE_HISTORY_H
  41 #include <history.h>
  42 #else
  43 #include <readline/history.h>
  44 #endif
  45
  46 #include <errno.h>
  47 #include <getopt.h>
  48 #include <signal.h>
  49 #include <unistd.h>
  50
  51 #include <sys/socket.h>
  52 #include <sys/types.h>
  53 #include <sys/stat.h>
  54 #include <fcntl.h>
  55 #include <netdb.h>
  56
  57 #include <sys/types.h>
  58 #include <sys/socket.h>
  59 #include <netinet/in.h>
  60 #include <sys/un.h>
  61 #include <pwd.h>
  62
  63 #include <dlfcn.h>
  64
  65 #include "Display.hpp"
  66 #include "Replace.hpp"
  67
  68 #include "Cycript.tab.hh"
  69 #include "Driver.hpp"
  70
  71 static volatile enum {
  72     Working,
  73     Parsing,
  74     Running,
  75     Sending,
  76     Waiting,
  77 } mode_;
  78
  79 static jmp_buf ctrlc_;
  80
  81 static void sigint(int) {
  82     switch (mode_) {
  83         case Working:
  84             return;
  85         case Parsing:
  86             longjmp(ctrlc_, 1);
  87         case Running:
  88             throw "*** Ctrl-C";
  89         case Sending:
  90             return;
  91         case Waiting:
  92             return;
  93     }
  94 }
  95
  96 #if YYDEBUG
  97 static bool bison_;
  98 #endif
  99 static bool strict_;
 100 static bool pretty_;
 101
 102 void Setup(CYDriver &driver, cy::parser &parser) {
 103 #if YYDEBUG
 104     if (bison_)
 105         parser.set_debug_level(1);
 106 #endif
 107     if (strict_)
 108         driver.strict_ = true;
 109 }
 110
 111 void Setup(CYOutput &out, CYDriver &driver, CYOptions &options, bool lower) {
 112     out.pretty_ = pretty_;
 113     CYContext context(options);
 114     if (lower)
 115         driver.program_->Replace(context);
 116 }
 117
 118 static CYUTF8String Run(CYPool &pool, int client, CYUTF8String code) {
 119     const char *json;
 120     uint32_t size;
 121
 122     if (client == -1) {
 123         mode_ = Running;
 124 #ifdef CY_EXECUTE
 125         json = CYExecute(CYGetJSContext(), pool, code);
 126 #else
 127         json = NULL;
 128 #endif
 129         mode_ = Working;
 130         if (json == NULL)
 131             size = 0;
 132         else
 133             size = strlen(json);
 134     } else {
 135         mode_ = Sending;
 136         size = code.size;
 137         _assert(CYSendAll(client, &size, sizeof(size)));
 138         _assert(CYSendAll(client, code.data, code.size));
 139         mode_ = Waiting;
 140         _assert(CYRecvAll(client, &size, sizeof(size)));
 141         if (size == _not(uint32_t))
 142             json = NULL;
 143         else {
 144             char *temp(new(pool) char[size + 1]);
 145             _assert(CYRecvAll(client, temp, size));
 146             temp[size] = '\0';
 147             json = temp;
 148         }
 149         mode_ = Working;
 150     }
 151
 152     return CYUTF8String(json, size);
 153 }
 154
 155 static CYUTF8String Run(CYPool &pool, int client, const std::string &code) {
 156     return Run(pool, client, CYUTF8String(code.c_str(), code.size()));
 157 }
 158
 159 static std::ostream *out_;
 160
 161 static void Write(bool syntax, const char *data, size_t size, std::ostream &out) {
 162     if (syntax)
 163         CYLexerHighlight(data, size, out);
 164     else
 165         out.write(data, size);
 166 }
 167
 168 static void Output(bool syntax, CYUTF8String json, std::ostream *out, bool expand = false) {
 169     const char *data(json.data);
 170     size_t size(json.size);
 171
 172     if (data == NULL || out == NULL)
 173         return;
 174
 175     if (!expand ||
 176         data[0] != '@' && data[0] != '"' && data[0] != '\'' ||
 177         data[0] == '@' && data[1] != '"' && data[1] != '\''
 178     )
 179         Write(syntax, data, size, *out);
 180     else for (size_t i(0); i != size; ++i)
 181         if (data[i] != '\\')
 182             *out << data[i];
 183         else switch(data[++i]) {
 184             case '\0': goto done;
 185             case '\\': *out << '\\'; break;
 186             case '\'': *out << '\''; break;
 187             case '"': *out << '"'; break;
 188             case 'b': *out << '\b'; break;
 189             case 'f': *out << '\f'; break;
 190             case 'n': *out << '\n'; break;
 191             case 'r': *out << '\r'; break;
 192             case 't': *out << '\t'; break;
 193             case 'v': *out << '\v'; break;
 194             default: *out << '\\'; --i; break;
 195         }
 196
 197   done:
 198     *out << std::endl;
 199 }
 200
 201 static void Run(int client, bool syntax, const char *data, size_t size, std::ostream *out = NULL, bool expand = false) {
 202     CYPool pool;
 203     Output(syntax, Run(pool, client, CYUTF8String(data, size)), out, expand);
 204 }
 205
 206 static void Run(int client, bool syntax, std::string &code, std::ostream *out = NULL, bool expand = false) {
 207     Run(client, syntax, code.c_str(), code.size(), out, expand);
 208 }
 209
 210 int (*append_history$)(int, const char *);
 211
 212 static std::string command_;
 213
 214 static CYExpression *ParseExpression(CYUTF8String code) {
 215     std::stringstream stream;
 216     stream << '(' << code << ')';
 217     CYDriver driver(stream);
 218
 219     cy::parser parser(driver);
 220     Setup(driver, parser);
 221
 222     if (parser.parse() != 0 || !driver.errors_.empty())
 223         return NULL;
 224
 225     CYOptions options;
 226     CYContext context(options);
 227
 228     CYStatement *statement(driver.program_->statements_);
 229     _assert(statement != NULL);
 230     _assert(statement->next_ == NULL);
 231
 232     CYExpress *express(dynamic_cast<CYExpress *>(driver.program_->statements_));
 233     _assert(express != NULL);
 234
 235     return express->expression_;
 236 }
 237
 238 static int client_;
 239
 240 static char **Complete(const char *word, int start, int end) {
 241     rl_attempted_completion_over = ~0;
 242
 243     CYLocalPool pool;
 244
 245     std::string line(rl_line_buffer, start);
 246     std::istringstream stream(command_ + line);
 247     CYDriver driver(stream);
 248
 249     driver.auto_ = true;
 250
 251     cy::parser parser(driver);
 252     Setup(driver, parser);
 253
 254     if (parser.parse() != 0 || !driver.errors_.empty())
 255         return NULL;
 256
 257     if (driver.mode_ == CYDriver::AutoNone)
 258         return NULL;
 259
 260     CYExpression *expression;
 261
 262     CYOptions options;
 263     CYContext context(options);
 264
 265     std::ostringstream prefix;
 266
 267     switch (driver.mode_) {
 268         case CYDriver::AutoPrimary:
 269             expression = $ CYThis();
 270         break;
 271
 272         case CYDriver::AutoDirect:
 273             expression = driver.context_;
 274         break;
 275
 276         case CYDriver::AutoIndirect:
 277             expression = $ CYIndirect(driver.context_);
 278         break;
 279
 280         case CYDriver::AutoMessage: {
 281             CYDriver::Context &thing(driver.contexts_.back());
 282             expression = $M($C1($V("object_getClass"), thing.context_), $S("messages"));
 283             for (CYDriver::Context::Words::const_iterator part(thing.words_.begin()); part != thing.words_.end(); ++part)
 284                 prefix << (*part)->word_ << ':';
 285         } break;
 286
 287         default:
 288             _assert(false);
 289     }
 290
 291     std::string begin(prefix.str());
 292
 293     driver.program_ = $ CYProgram($ CYExpress($C3(ParseExpression(
 294     "   function(object, prefix, word) {\n"
 295     "       var names = [];\n"
 296     "       var before = prefix.length;\n"
 297     "       prefix += word;\n"
 298     "       var entire = prefix.length;\n"
 299     "       for (var name in object)\n"
 300     "           if (name.substring(0, entire) == prefix)\n"
 301     "               names.push(name.substr(before));\n"
 302     "       return names;\n"
 303     "   }\n"
 304     ), expression, $S(begin.c_str()), $S(word))));
 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     // XXX: if this fails we should not try to parse it
 315
 316     CYExpression *result(ParseExpression(json));
 317     if (result == NULL)
 318         return NULL;
 319
 320     CYArray *array(dynamic_cast<CYArray *>(result->Primitive(context)));
 321     if (array == NULL) {
 322         *out_ << '\n';
 323         Output(false, json, out_);
 324         rl_forced_update_display();
 325         return NULL;
 326     }
 327
 328     // XXX: use an std::set?
 329     typedef std::vector<std::string> Completions;
 330     Completions completions;
 331
 332     std::string common;
 333     bool rest(false);
 334
 335     CYForEach (element, array->elements_) {
 336         CYString *string(dynamic_cast<CYString *>(element->value_));
 337         _assert(string != NULL);
 338
 339         std::string completion;
 340         if (string->size_ != 0)
 341             completion.assign(string->value_, string->size_);
 342         else if (driver.mode_ == CYDriver::AutoMessage)
 343             completion = "]";
 344         else
 345             continue;
 346
 347         completions.push_back(completion);
 348
 349         if (!rest) {
 350             common = completion;
 351             rest = true;
 352         } else {
 353             size_t limit(completion.size()), size(common.size());
 354             if (size > limit)
 355                 common = common.substr(0, limit);
 356             else
 357                 limit = size;
 358             for (limit = 0; limit != size; ++limit)
 359                 if (common[limit] != completion[limit])
 360                     break;
 361             if (limit != size)
 362                 common = common.substr(0, limit);
 363         }
 364     }
 365
 366     size_t count(completions.size());
 367     if (count == 0)
 368         return NULL;
 369
 370     size_t colon(common.find(':'));
 371     if (colon != std::string::npos)
 372         common = common.substr(0, colon + 1);
 373     if (completions.size() == 1)
 374         common += ' ';
 375
 376     char **results(reinterpret_cast<char **>(malloc(sizeof(char *) * (count + 2))));
 377
 378     results[0] = strdup(common.c_str());
 379     size_t index(0);
 380     for (Completions::const_iterator i(completions.begin()); i != completions.end(); ++i)
 381         results[++index] = strdup(i->c_str());
 382     results[count + 1] = NULL;
 383
 384     return results;
 385 }
 386
 387 // need char *, not const char *
 388 static char name_[] = "cycript";
 389 static char break_[] = " \t\n\"\\'`@$><=;|&{(" ")}" ".:[]";
 390
 391 class History {
 392   private:
 393     std::string histfile_;
 394     size_t histlines_;
 395
 396   public:
 397     History(std::string histfile) :
 398         histfile_(histfile),
 399         histlines_(0)
 400     {
 401         read_history(histfile_.c_str());
 402     }
 403
 404     ~History() {
 405         if (append_history$ != NULL) {
 406             int fd(_syscall(open(histfile_.c_str(), O_CREAT | O_WRONLY, 0600)));
 407             _syscall(close(fd));
 408             _assert((*append_history$)(histlines_, histfile_.c_str()) == 0);
 409         } else {
 410             _assert(write_history(histfile_.c_str()) == 0);
 411         }
 412     }
 413
 414     void operator +=(const std::string &command) {
 415         add_history(command_.c_str());
 416         ++histlines_;
 417     }
 418 };
 419
 420 static void Console(CYOptions &options) {
 421     std::string basedir;
 422     if (const char *home = getenv("HOME"))
 423         basedir = home;
 424     else {
 425         passwd *passwd;
 426         if (const char *username = getenv("LOGNAME"))
 427             passwd = getpwnam(username);
 428         else
 429             passwd = getpwuid(getuid());
 430         basedir = passwd->pw_dir;
 431     }
 432
 433     basedir += "/.cycript";
 434     mkdir(basedir.c_str(), 0700);
 435
 436     rl_initialize();
 437     rl_readline_name = name_;
 438
 439     History history(basedir + "/history");
 440
 441     bool bypass(false);
 442     bool debug(false);
 443     bool expand(false);
 444     bool lower(true);
 445     bool syntax(true);
 446
 447     out_ = &std::cout;
 448
 449     // rl_completer_word_break_characters is broken in libedit
 450     rl_basic_word_break_characters = break_;
 451
 452     rl_completer_word_break_characters = break_;
 453     rl_attempted_completion_function = &Complete;
 454     rl_bind_key('\t', rl_complete);
 455
 456     struct sigaction action;
 457     sigemptyset(&action.sa_mask);
 458     action.sa_handler = &sigint;
 459     action.sa_flags = 0;
 460     sigaction(SIGINT, &action, NULL);
 461
 462     restart: for (;;) {
 463         command_.clear();
 464         std::vector<std::string> lines;
 465
 466         bool extra(false);
 467         const char *prompt("cy# ");
 468
 469         if (setjmp(ctrlc_) != 0) {
 470             mode_ = Working;
 471             *out_ << std::endl;
 472             goto restart;
 473         }
 474
 475       read:
 476
 477 #if RL_READLINE_VERSION >= 0x0600
 478         if (syntax)
 479             rl_redisplay_function = CYDisplayUpdate;
 480         else
 481             rl_redisplay_function = rl_redisplay;
 482 #endif
 483
 484         mode_ = Parsing;
 485         char *line(readline(prompt));
 486         mode_ = Working;
 487
 488         if (line == NULL) {
 489             *out_ << std::endl;
 490             break;
 491         } else if (line[0] == '\0')
 492             goto read;
 493
 494         if (!extra) {
 495             extra = true;
 496             if (line[0] == '?') {
 497                 std::string data(line + 1);
 498                 if (data == "bypass") {
 499                     bypass = !bypass;
 500                     *out_ << "bypass == " << (bypass ? "true" : "false") << std::endl;
 501                 } else if (data == "debug") {
 502                     debug = !debug;
 503                     *out_ << "debug == " << (debug ? "true" : "false") << std::endl;
 504                 } else if (data == "destroy") {
 505                     CYDestroyContext();
 506                 } else if (data == "gc") {
 507                     *out_ << "collecting... " << std::flush;
 508                     CYGarbageCollect(CYGetJSContext());
 509                     *out_ << "done." << std::endl;
 510                 } else if (data == "exit") {
 511                     return;
 512                 } else if (data == "expand") {
 513                     expand = !expand;
 514                     *out_ << "expand == " << (expand ? "true" : "false") << std::endl;
 515                 } else if (data == "lower") {
 516                     lower = !lower;
 517                     *out_ << "lower == " << (lower ? "true" : "false") << std::endl;
 518                 } else if (data == "syntax") {
 519                     syntax = !syntax;
 520                     *out_ << "syntax == " << (syntax ? "true" : "false") << std::endl;
 521                 }
 522                 command_ = line;
 523                 history += command_;
 524                 goto restart;
 525             }
 526         }
 527
 528         command_ += line;
 529
 530         char *begin(line), *end(line + strlen(line));
 531         while (char *nl = reinterpret_cast<char *>(memchr(begin, '\n', end - begin))) {
 532             *nl = '\0';
 533             lines.push_back(begin);
 534             begin = nl + 1;
 535         }
 536
 537         lines.push_back(begin);
 538
 539         free(line);
 540
 541         std::string code;
 542
 543         if (bypass)
 544             code = command_;
 545         else {
 546             CYLocalPool pool;
 547
 548             std::istringstream stream(command_);
 549             CYDriver driver(stream);
 550
 551             cy::parser parser(driver);
 552             Setup(driver, parser);
 553
 554             if (parser.parse() != 0 || !driver.errors_.empty()) {
 555                 for (CYDriver::Errors::const_iterator error(driver.errors_.begin()); error != driver.errors_.end(); ++error) {
 556                     cy::position begin(error->location_.begin);
 557                     if (begin.line != lines.size() || begin.column < lines.back().size() || error->warning_) {
 558                         cy::position end(error->location_.end);
 559
 560                         if (begin.line != lines.size()) {
 561                             std::cerr << "  | ";
 562                             std::cerr << lines[begin.line - 1] << std::endl;
 563                         }
 564
 565                         std::cerr << "....";
 566                         for (size_t i(0); i != begin.column; ++i)
 567                             std::cerr << '.';
 568                         if (begin.line != end.line || begin.column == end.column)
 569                             std::cerr << '^';
 570                         else for (size_t i(0), e(end.column - begin.column); i != e; ++i)
 571                             std::cerr << '^';
 572                         std::cerr << std::endl;
 573
 574                         std::cerr << "  | ";
 575                         std::cerr << error->message_ << std::endl;
 576
 577                         history += command_;
 578                         goto restart;
 579                     }
 580                 }
 581
 582                 driver.errors_.clear();
 583
 584                 command_ += '\n';
 585                 prompt = "cy> ";
 586                 goto read;
 587             }
 588
 589             if (driver.program_ == NULL)
 590                 goto restart;
 591
 592             std::ostringstream str;
 593             CYOutput out(str, options);
 594             Setup(out, driver, options, lower);
 595             out << *driver.program_;
 596             code = str.str();
 597         }
 598
 599         history += command_;
 600
 601         if (debug) {
 602             std::cout << "cy= ";
 603             Write(syntax, code.c_str(), code.size(), std::cout);
 604             std::cout << std::endl;
 605         }
 606
 607         Run(client_, syntax, code, out_, expand);
 608     }
 609 }
 610
 611 void InjectLibrary(pid_t, int, const char *[]);
 612
 613 int Main(int argc, char * const argv[], char const * const envp[]) {
 614     bool tty(isatty(STDIN_FILENO));
 615     bool compile(false);
 616     bool target(false);
 617     CYOptions options;
 618
 619     append_history$ = (int (*)(int, const char *)) (dlsym(RTLD_DEFAULT, "append_history"));
 620
 621 #ifdef CY_ATTACH
 622     pid_t pid(_not(pid_t));
 623 #endif
 624
 625     const char *host(NULL);
 626     const char *port(NULL);
 627
 628     optind = 1;
 629
 630     for (;;) {
 631         int option(getopt_long(argc, argv,
 632             "c"
 633             "g:"
 634             "n:"
 635 #ifdef CY_ATTACH
 636             "p:"
 637 #endif
 638             "r:"
 639             "s"
 640         , (const struct option[]) {
 641             {NULL, no_argument, NULL, 'c'},
 642             {NULL, required_argument, NULL, 'g'},
 643             {NULL, required_argument, NULL, 'n'},
 644 #ifdef CY_ATTACH
 645             {NULL, required_argument, NULL, 'p'},
 646 #endif
 647             {NULL, required_argument, NULL, 'r'},
 648             {NULL, no_argument, NULL, 's'},
 649         {0, 0, 0, 0}}, NULL));
 650
 651         switch (option) {
 652             case -1:
 653                 goto getopt;
 654
 655             case ':':
 656             case '?':
 657                 fprintf(stderr,
 658                     "usage: cycript [-c]"
 659 #ifdef CY_ATTACH
 660                     " [-p <pid|name>]"
 661 #endif
 662                     " [-r <host:port>]"
 663                     " [<script> [<arg>...]]\n"
 664                 );
 665                 return 1;
 666
 667             target:
 668                 if (!target)
 669                     target = true;
 670                 else {
 671                     fprintf(stderr, "only one of -[c"
 672 #ifdef CY_ATTACH
 673                     "p"
 674 #endif
 675                     "r] may be used at a time\n");
 676                     return 1;
 677                 }
 678             break;
 679
 680             case 'c':
 681                 compile = true;
 682             goto target;
 683
 684             case 'g':
 685                 if (false);
 686                 else if (strcmp(optarg, "rename") == 0)
 687                     options.verbose_ = true;
 688 #if YYDEBUG
 689                 else if (strcmp(optarg, "bison") == 0)
 690                     bison_ = true;
 691 #endif
 692                 else {
 693                     fprintf(stderr, "invalid name for -g\n");
 694                     return 1;
 695                 }
 696             break;
 697
 698             case 'n':
 699                 if (false);
 700                 else if (strcmp(optarg, "minify") == 0)
 701                     pretty_ = true;
 702                 else {
 703                     fprintf(stderr, "invalid name for -n\n");
 704                     return 1;
 705                 }
 706             break;
 707
 708 #ifdef CY_ATTACH
 709             case 'p': {
 710                 size_t size(strlen(optarg));
 711                 char *end;
 712
 713                 pid = strtoul(optarg, &end, 0);
 714                 if (optarg + size != end) {
 715                     // XXX: arg needs to be escaped in some horrendous way of doom
 716                     // XXX: this is a memory leak now because I just don't care enough
 717                     char *command;
 718                     asprintf(&command, "ps axc|sed -e '/^ *[0-9]/{s/^ *\\([0-9]*\\)\\( *[^ ]*\\)\\{3\\} *-*\\([^ ]*\\)/\\3 \\1/;/^%s /{s/^[^ ]* //;q;};};d'", optarg);
 719
 720                     if (FILE *pids = popen(command, "r")) {
 721                         char value[32];
 722                         size = 0;
 723
 724                         for (;;) {
 725                             size_t read(fread(value + size, 1, sizeof(value) - size, pids));
 726                             if (read == 0)
 727                                 break;
 728                             else {
 729                                 size += read;
 730                                 if (size == sizeof(value))
 731                                     goto fail;
 732                             }
 733                         }
 734
 735                       size:
 736                         if (size == 0)
 737                             goto fail;
 738                         if (value[size - 1] == '\n') {
 739                             --size;
 740                             goto size;
 741                         }
 742
 743                         value[size] = '\0';
 744                         size = strlen(value);
 745                         pid = strtoul(value, &end, 0);
 746                         if (value + size != end) fail:
 747                             pid = _not(pid_t);
 748                         _syscall(pclose(pids));
 749                     }
 750
 751                     if (pid == _not(pid_t)) {
 752                         fprintf(stderr, "unable to find process `%s' using ps\n", optarg);
 753                         return 1;
 754                     }
 755                 }
 756             } goto target;
 757 #endif
 758
 759             case 'r': {
 760                 //size_t size(strlen(optarg));
 761
 762                 char *colon(strrchr(optarg, ':'));
 763                 if (colon == NULL) {
 764                     fprintf(stderr, "missing colon in hostspec\n");
 765                     return 1;
 766                 }
 767
 768                 /*char *end;
 769                 port = strtoul(colon + 1, &end, 10);
 770                 if (end != optarg + size) {
 771                     fprintf(stderr, "invalid port in hostspec\n");
 772                     return 1;
 773                 }*/
 774
 775                 host = optarg;
 776                 *colon = '\0';
 777                 port = colon + 1;
 778             } goto target;
 779
 780             case 's':
 781                 strict_ = true;
 782             break;
 783
 784             default:
 785                 _assert(false);
 786         }
 787     }
 788
 789   getopt:
 790     argc -= optind;
 791     argv += optind;
 792
 793     const char *script;
 794
 795 #ifdef CY_ATTACH
 796     if (pid != _not(pid_t) && argc > 1) {
 797         fprintf(stderr, "-p cannot set argv\n");
 798         return 1;
 799     }
 800 #endif
 801
 802     if (argc == 0)
 803         script = NULL;
 804     else {
 805 #ifdef CY_EXECUTE
 806         // XXX: const_cast?! wtf gcc :(
 807         CYSetArgs(argc - 1, const_cast<const char **>(argv + 1));
 808 #endif
 809         script = argv[0];
 810         if (strcmp(script, "-") == 0)
 811             script = NULL;
 812     }
 813
 814 #ifdef CY_ATTACH
 815     if (pid == _not(pid_t))
 816         client_ = -1;
 817     else {
 818         struct Socket {
 819             int fd_;
 820
 821             Socket(int fd) :
 822                 fd_(fd)
 823             {
 824             }
 825
 826             ~Socket() {
 827                 close(fd_);
 828             }
 829
 830             operator int() {
 831                 return fd_;
 832             }
 833         } server(_syscall(socket(PF_UNIX, SOCK_STREAM, 0)));
 834
 835         struct sockaddr_un address;
 836         memset(&address, 0, sizeof(address));
 837         address.sun_family = AF_UNIX;
 838
 839         const char *tmp;
 840 #if defined(__APPLE__) && (defined(__arm__) || defined(__arm64__))
 841         tmp = "/Library/Caches";
 842 #else
 843         tmp = "/tmp";
 844 #endif
 845
 846         sprintf(address.sun_path, "%s/.s.cy.%u", tmp, getpid());
 847         unlink(address.sun_path);
 848
 849         struct File {
 850             const char *path_;
 851
 852             File(const char *path) :
 853                 path_(path)
 854             {
 855             }
 856
 857             ~File() {
 858                 unlink(path_);
 859             }
 860         } file(address.sun_path);
 861
 862         _syscall(bind(server, reinterpret_cast<sockaddr *>(&address), SUN_LEN(&address)));
 863         _syscall(chmod(address.sun_path, 0777));
 864
 865         _syscall(listen(server, 1));
 866         InjectLibrary(pid, 1, (const char *[]) {address.sun_path, NULL});
 867         client_ = _syscall(accept(server, NULL, NULL));
 868     }
 869 #else
 870     client_ = -1;
 871 #endif
 872
 873     if (client_ == -1 && host != NULL && port != NULL) {
 874         struct addrinfo hints;
 875         memset(&hints, 0, sizeof(hints));
 876         hints.ai_family = AF_UNSPEC;
 877         hints.ai_socktype = SOCK_STREAM;
 878         hints.ai_protocol = 0;
 879         hints.ai_flags = 0;
 880
 881         struct addrinfo *infos;
 882         _syscall(getaddrinfo(host, port, &hints, &infos));
 883
 884         _assert(infos != NULL); try {
 885             for (struct addrinfo *info(infos); info != NULL; info = info->ai_next) {
 886                 int client(_syscall(socket(info->ai_family, info->ai_socktype, info->ai_protocol))); try {
 887                     _syscall(connect(client, info->ai_addr, info->ai_addrlen));
 888                     client_ = client;
 889                     break;
 890                 } catch (...) {
 891                     _syscall(close(client));
 892                     throw;
 893                 }
 894             }
 895         } catch (...) {
 896             freeaddrinfo(infos);
 897             throw;
 898         }
 899     }
 900
 901     if (script == NULL && tty)
 902         Console(options);
 903     else {
 904         CYLocalPool pool;
 905
 906         std::istream *stream;
 907         if (script == NULL) {
 908             stream = &std::cin;
 909             script = "<stdin>";
 910         } else {
 911             stream = new std::fstream(script, std::ios::in | std::ios::binary);
 912             _assert(!stream->fail());
 913         }
 914
 915         CYDriver driver(*stream, script);
 916         cy::parser parser(driver);
 917         Setup(driver, parser);
 918
 919         if (parser.parse() != 0 || !driver.errors_.empty()) {
 920             for (CYDriver::Errors::const_iterator i(driver.errors_.begin()); i != driver.errors_.end(); ++i)
 921                 std::cerr << i->location_.begin << ": " << i->message_ << std::endl;
 922         } else if (driver.program_ != NULL) {
 923             std::ostringstream str;
 924             CYOutput out(str, options);
 925             Setup(out, driver, options, true);
 926             out << *driver.program_;
 927             std::string code(str.str());
 928             if (compile)
 929                 std::cout << code;
 930             else
 931                 Run(client_, false, code, &std::cout);
 932         }
 933     }
 934
 935     return 0;
 936 }
 937
 938 int main(int argc, char * const argv[], char const * const envp[]) {
 939     try {
 940         return Main(argc, argv, envp);
 941     } catch (const CYException &error) {
 942         CYPool pool;
 943         fprintf(stderr, "%s\n", error.PoolCString(pool));
 944         return 1;
 945     }
 946 }