Console.cpp

   1 /* Cycript - Optimizing JavaScript Compiler/Runtime
   2  * Copyright (C) 2009-2015  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             CYCancel();
  89             return;
  90         case Sending:
  91             return;
  92         case Waiting:
  93             return;
  94     }
  95 }
  96
  97 #if YYDEBUG
  98 static bool bison_;
  99 #endif
 100 static bool strict_;
 101 static bool pretty_;
 102
 103 void Setup(CYDriver &driver, cy::parser &parser) {
 104 #if YYDEBUG
 105     if (bison_)
 106         parser.set_debug_level(1);
 107 #endif
 108     if (strict_)
 109         driver.strict_ = true;
 110 }
 111
 112 void Setup(CYOutput &out, CYDriver &driver, CYOptions &options, bool lower) {
 113     out.pretty_ = pretty_;
 114     CYContext context(options);
 115     if (lower)
 116         driver.program_->Replace(context);
 117 }
 118
 119 static CYUTF8String Run(CYPool &pool, int client, CYUTF8String code) {
 120     const char *json;
 121     uint32_t size;
 122
 123     if (client == -1) {
 124         mode_ = Running;
 125 #ifdef CY_EXECUTE
 126         json = CYExecute(CYGetJSContext(), pool, code);
 127 #else
 128         json = NULL;
 129 #endif
 130         mode_ = Working;
 131         if (json == NULL)
 132             size = 0;
 133         else
 134             size = strlen(json);
 135     } else {
 136         mode_ = Sending;
 137         size = code.size;
 138         _assert(CYSendAll(client, &size, sizeof(size)));
 139         _assert(CYSendAll(client, code.data, code.size));
 140         mode_ = Waiting;
 141         _assert(CYRecvAll(client, &size, sizeof(size)));
 142         if (size == _not(uint32_t))
 143             json = NULL;
 144         else {
 145             char *temp(new(pool) char[size + 1]);
 146             _assert(CYRecvAll(client, temp, size));
 147             temp[size] = '\0';
 148             json = temp;
 149         }
 150         mode_ = Working;
 151     }
 152
 153     return CYUTF8String(json, size);
 154 }
 155
 156 static CYUTF8String Run(CYPool &pool, int client, const std::string &code) {
 157     return Run(pool, client, CYUTF8String(code.c_str(), code.size()));
 158 }
 159
 160 static std::ostream *out_;
 161
 162 static void Write(bool syntax, const char *data, size_t size, std::ostream &out) {
 163     if (syntax)
 164         CYLexerHighlight(data, size, out);
 165     else
 166         out.write(data, size);
 167 }
 168
 169 static void Output(bool syntax, CYUTF8String json, std::ostream *out, bool expand = false) {
 170     const char *data(json.data);
 171     size_t size(json.size);
 172
 173     if (data == NULL || out == NULL)
 174         return;
 175
 176     if (!expand ||
 177         data[0] != '@' && data[0] != '"' && data[0] != '\'' ||
 178         data[0] == '@' && data[1] != '"' && data[1] != '\''
 179     )
 180         Write(syntax, data, size, *out);
 181     else for (size_t i(0); i != size; ++i)
 182         if (data[i] != '\\')
 183             *out << data[i];
 184         else switch(data[++i]) {
 185             case '\0': goto done;
 186             case '\\': *out << '\\'; break;
 187             case '\'': *out << '\''; break;
 188             case '"': *out << '"'; break;
 189             case 'b': *out << '\b'; break;
 190             case 'f': *out << '\f'; break;
 191             case 'n': *out << '\n'; break;
 192             case 'r': *out << '\r'; break;
 193             case 't': *out << '\t'; break;
 194             case 'v': *out << '\v'; break;
 195             default: *out << '\\'; --i; break;
 196         }
 197
 198   done:
 199     *out << std::endl;
 200 }
 201
 202 static void Run(int client, bool syntax, const char *data, size_t size, std::ostream *out = NULL, bool expand = false) {
 203     CYPool pool;
 204     Output(syntax, Run(pool, client, CYUTF8String(data, size)), out, expand);
 205 }
 206
 207 static void Run(int client, bool syntax, std::string &code, std::ostream *out = NULL, bool expand = false) {
 208     Run(client, syntax, code.c_str(), code.size(), out, expand);
 209 }
 210
 211 int (*append_history$)(int, const char *);
 212
 213 static std::string command_;
 214
 215 static CYExpression *ParseExpression(CYUTF8String code) {
 216     std::stringstream stream;
 217     stream << '(' << code << ')';
 218     CYDriver driver(stream);
 219
 220     cy::parser parser(driver);
 221     Setup(driver, parser);
 222
 223     if (parser.parse() != 0 || !driver.errors_.empty())
 224         return NULL;
 225
 226     CYOptions options;
 227     CYContext context(options);
 228
 229     CYStatement *statement(driver.program_->statements_);
 230     _assert(statement != NULL);
 231     _assert(statement->next_ == NULL);
 232
 233     CYExpress *express(dynamic_cast<CYExpress *>(driver.program_->statements_));
 234     _assert(express != NULL);
 235
 236     return express->expression_;
 237 }
 238
 239 static int client_;
 240
 241 static char **Complete(const char *word, int start, int end) {
 242     rl_attempted_completion_over = ~0;
 243
 244     CYLocalPool pool;
 245
 246     std::string line(rl_line_buffer, start);
 247     std::istringstream stream(command_ + line);
 248     CYDriver driver(stream);
 249
 250     driver.auto_ = true;
 251
 252     cy::parser parser(driver);
 253     Setup(driver, parser);
 254
 255     if (parser.parse() != 0 || !driver.errors_.empty())
 256         return NULL;
 257
 258     if (driver.mode_ == CYDriver::AutoNone)
 259         return NULL;
 260
 261     CYExpression *expression;
 262
 263     CYOptions options;
 264     CYContext context(options);
 265
 266     std::ostringstream prefix;
 267
 268     switch (driver.mode_) {
 269         case CYDriver::AutoPrimary:
 270             expression = $ CYThis();
 271         break;
 272
 273         case CYDriver::AutoDirect:
 274             expression = driver.context_;
 275         break;
 276
 277         case CYDriver::AutoIndirect:
 278             expression = $ CYIndirect(driver.context_);
 279         break;
 280
 281         case CYDriver::AutoMessage: {
 282             CYDriver::Context &thing(driver.contexts_.back());
 283             expression = $M($C1($V("object_getClass"), thing.context_), $S("messages"));
 284             for (CYDriver::Context::Words::const_iterator part(thing.words_.begin()); part != thing.words_.end(); ++part)
 285                 prefix << (*part)->word_ << ':';
 286         } break;
 287
 288         default:
 289             _assert(false);
 290     }
 291
 292     std::string begin(prefix.str());
 293
 294     driver.program_ = $ CYProgram($ CYExpress($C3(ParseExpression(
 295     "   function(object, prefix, word) {\n"
 296     "       var names = [];\n"
 297     "       var before = prefix.length;\n"
 298     "       prefix += word;\n"
 299     "       var entire = prefix.length;\n"
 300     "       for (var name in object)\n"
 301     "           if (name.substring(0, entire) == prefix)\n"
 302     "               names.push(name.substr(before));\n"
 303     "       return names;\n"
 304     "   }\n"
 305     ), expression, $S(begin.c_str()), $S(word))));
 306
 307     driver.program_->Replace(context);
 308
 309     std::ostringstream str;
 310     CYOutput out(str, options);
 311     out << *driver.program_;
 312
 313     std::string code(str.str());
 314     CYUTF8String json(Run(pool, client_, code));
 315     // XXX: if this fails we should not try to parse it
 316
 317     CYExpression *result(ParseExpression(json));
 318     if (result == NULL)
 319         return NULL;
 320
 321     CYArray *array(dynamic_cast<CYArray *>(result->Primitive(context)));
 322     if (array == NULL) {
 323         *out_ << '\n';
 324         Output(false, json, out_);
 325         rl_forced_update_display();
 326         return NULL;
 327     }
 328
 329     // XXX: use an std::set?
 330     typedef std::vector<std::string> Completions;
 331     Completions completions;
 332
 333     std::string common;
 334     bool rest(false);
 335
 336     CYForEach (element, array->elements_) {
 337         CYString *string(dynamic_cast<CYString *>(element->value_));
 338         _assert(string != NULL);
 339
 340         std::string completion;
 341         if (string->size_ != 0)
 342             completion.assign(string->value_, string->size_);
 343         else if (driver.mode_ == CYDriver::AutoMessage)
 344             completion = "]";
 345         else
 346             continue;
 347
 348         completions.push_back(completion);
 349
 350         if (!rest) {
 351             common = completion;
 352             rest = true;
 353         } else {
 354             size_t limit(completion.size()), size(common.size());
 355             if (size > limit)
 356                 common = common.substr(0, limit);
 357             else
 358                 limit = size;
 359             for (limit = 0; limit != size; ++limit)
 360                 if (common[limit] != completion[limit])
 361                     break;
 362             if (limit != size)
 363                 common = common.substr(0, limit);
 364         }
 365     }
 366
 367     size_t count(completions.size());
 368     if (count == 0)
 369         return NULL;
 370
 371     size_t colon(common.find(':'));
 372     if (colon != std::string::npos)
 373         common = common.substr(0, colon + 1);
 374     if (completions.size() == 1)
 375         common += ' ';
 376
 377     char **results(reinterpret_cast<char **>(malloc(sizeof(char *) * (count + 2))));
 378
 379     results[0] = strdup(common.c_str());
 380     size_t index(0);
 381     for (Completions::const_iterator i(completions.begin()); i != completions.end(); ++i)
 382         results[++index] = strdup(i->c_str());
 383     results[count + 1] = NULL;
 384
 385     return results;
 386 }
 387
 388 // need char *, not const char *
 389 static char name_[] = "cycript";
 390 static char break_[] = " \t\n\"\\'`@><=;|&{(" ")}" ".:[]";
 391
 392 class History {
 393   private:
 394     std::string histfile_;
 395     size_t histlines_;
 396
 397   public:
 398     History(std::string histfile) :
 399         histfile_(histfile),
 400         histlines_(0)
 401     {
 402         read_history(histfile_.c_str());
 403     }
 404
 405     ~History() {
 406         if (append_history$ != NULL) {
 407             int fd(_syscall(open(histfile_.c_str(), O_CREAT | O_WRONLY, 0600)));
 408             _syscall(close(fd));
 409             _assert((*append_history$)(histlines_, histfile_.c_str()) == 0);
 410         } else {
 411             _assert(write_history(histfile_.c_str()) == 0);
 412         }
 413     }
 414
 415     void operator +=(const std::string &command) {
 416         add_history(command_.c_str());
 417         ++histlines_;
 418     }
 419 };
 420
 421 static void Console(CYOptions &options) {
 422     std::string basedir;
 423     if (const char *home = getenv("HOME"))
 424         basedir = home;
 425     else {
 426         passwd *passwd;
 427         if (const char *username = getenv("LOGNAME"))
 428             passwd = getpwnam(username);
 429         else
 430             passwd = getpwuid(getuid());
 431         basedir = passwd->pw_dir;
 432     }
 433
 434     basedir += "/.cycript";
 435     mkdir(basedir.c_str(), 0700);
 436
 437     rl_initialize();
 438     rl_readline_name = name_;
 439
 440     History history(basedir + "/history");
 441
 442     bool bypass(false);
 443     bool debug(false);
 444     bool expand(false);
 445     bool lower(true);
 446     bool syntax(true);
 447
 448     out_ = &std::cout;
 449
 450     // rl_completer_word_break_characters is broken in libedit
 451     rl_basic_word_break_characters = break_;
 452
 453     rl_completer_word_break_characters = break_;
 454     rl_attempted_completion_function = &Complete;
 455     rl_bind_key('\t', rl_complete);
 456
 457     struct sigaction action;
 458     sigemptyset(&action.sa_mask);
 459     action.sa_handler = &sigint;
 460     action.sa_flags = 0;
 461     sigaction(SIGINT, &action, NULL);
 462
 463     restart: for (;;) {
 464         command_.clear();
 465         std::vector<std::string> lines;
 466
 467         bool extra(false);
 468         const char *prompt("cy# ");
 469
 470         if (setjmp(ctrlc_) != 0) {
 471             mode_ = Working;
 472             *out_ << std::endl;
 473             goto restart;
 474         }
 475
 476       read:
 477
 478 #if RL_READLINE_VERSION >= 0x0600
 479         if (syntax)
 480             rl_redisplay_function = CYDisplayUpdate;
 481         else
 482             rl_redisplay_function = rl_redisplay;
 483 #endif
 484
 485         mode_ = Parsing;
 486         char *line(readline(prompt));
 487         mode_ = Working;
 488
 489         if (line == NULL) {
 490             *out_ << std::endl;
 491             break;
 492         } else if (line[0] == '\0')
 493             goto read;
 494
 495         if (!extra) {
 496             extra = true;
 497             if (line[0] == '?') {
 498                 std::string data(line + 1);
 499                 if (data == "bypass") {
 500                     bypass = !bypass;
 501                     *out_ << "bypass == " << (bypass ? "true" : "false") << std::endl;
 502                 } else if (data == "debug") {
 503                     debug = !debug;
 504                     *out_ << "debug == " << (debug ? "true" : "false") << std::endl;
 505                 } else if (data == "destroy") {
 506                     CYDestroyContext();
 507                 } else if (data == "gc") {
 508                     *out_ << "collecting... " << std::flush;
 509                     CYGarbageCollect(CYGetJSContext());
 510                     *out_ << "done." << std::endl;
 511                 } else if (data == "exit") {
 512                     return;
 513                 } else if (data == "expand") {
 514                     expand = !expand;
 515                     *out_ << "expand == " << (expand ? "true" : "false") << std::endl;
 516                 } else if (data == "lower") {
 517                     lower = !lower;
 518                     *out_ << "lower == " << (lower ? "true" : "false") << std::endl;
 519                 } else if (data == "syntax") {
 520                     syntax = !syntax;
 521                     *out_ << "syntax == " << (syntax ? "true" : "false") << std::endl;
 522                 }
 523                 command_ = line;
 524                 history += command_;
 525                 goto restart;
 526             }
 527         }
 528
 529         command_ += line;
 530
 531         char *begin(line), *end(line + strlen(line));
 532         while (char *nl = reinterpret_cast<char *>(memchr(begin, '\n', end - begin))) {
 533             *nl = '\0';
 534             lines.push_back(begin);
 535             begin = nl + 1;
 536         }
 537
 538         lines.push_back(begin);
 539
 540         free(line);
 541
 542         std::string code;
 543
 544         if (bypass)
 545             code = command_;
 546         else {
 547             CYLocalPool pool;
 548
 549             std::istringstream stream(command_);
 550             CYDriver driver(stream);
 551
 552             cy::parser parser(driver);
 553             Setup(driver, parser);
 554
 555             if (parser.parse() != 0 || !driver.errors_.empty()) {
 556                 for (CYDriver::Errors::const_iterator error(driver.errors_.begin()); error != driver.errors_.end(); ++error) {
 557                     CYPosition begin(error->location_.begin);
 558                     if (begin.line != lines.size() || begin.column < lines.back().size() || error->warning_) {
 559                         CYPosition end(error->location_.end);
 560
 561                         if (begin.line != lines.size()) {
 562                             std::cerr << "  | ";
 563                             std::cerr << lines[begin.line - 1] << std::endl;
 564                         }
 565
 566                         std::cerr << "....";
 567                         for (size_t i(0); i != begin.column; ++i)
 568                             std::cerr << '.';
 569                         if (begin.line != end.line || begin.column == end.column)
 570                             std::cerr << '^';
 571                         else for (size_t i(0), e(end.column - begin.column); i != e; ++i)
 572                             std::cerr << '^';
 573                         std::cerr << std::endl;
 574
 575                         std::cerr << "  | ";
 576                         std::cerr << error->message_ << std::endl;
 577
 578                         history += command_;
 579                         goto restart;
 580                     }
 581                 }
 582
 583                 driver.errors_.clear();
 584
 585                 command_ += '\n';
 586                 prompt = "cy> ";
 587                 goto read;
 588             }
 589
 590             if (driver.program_ == NULL)
 591                 goto restart;
 592
 593             std::ostringstream str;
 594             CYOutput out(str, options);
 595             Setup(out, driver, options, lower);
 596             out << *driver.program_;
 597             code = str.str();
 598         }
 599
 600         history += command_;
 601
 602         if (debug) {
 603             std::cout << "cy= ";
 604             Write(syntax, code.c_str(), code.size(), std::cout);
 605             std::cout << std::endl;
 606         }
 607
 608         Run(client_, syntax, code, out_, expand);
 609     }
 610 }
 611
 612 void InjectLibrary(pid_t, int, const char *[]);
 613
 614 int Main(int argc, char * const argv[], char const * const envp[]) {
 615     bool tty(isatty(STDIN_FILENO));
 616     bool compile(false);
 617     bool target(false);
 618     CYOptions options;
 619
 620     append_history$ = (int (*)(int, const char *)) (dlsym(RTLD_DEFAULT, "append_history"));
 621
 622 #ifdef CY_ATTACH
 623     pid_t pid(_not(pid_t));
 624 #endif
 625
 626     const char *host(NULL);
 627     const char *port(NULL);
 628
 629     optind = 1;
 630
 631     for (;;) {
 632         int option(getopt_long(argc, argv,
 633             "c"
 634             "g:"
 635             "n:"
 636 #ifdef CY_ATTACH
 637             "p:"
 638 #endif
 639             "r:"
 640             "s"
 641         , (const struct option[]) {
 642             {NULL, no_argument, NULL, 'c'},
 643             {NULL, required_argument, NULL, 'g'},
 644             {NULL, required_argument, NULL, 'n'},
 645 #ifdef CY_ATTACH
 646             {NULL, required_argument, NULL, 'p'},
 647 #endif
 648             {NULL, required_argument, NULL, 'r'},
 649             {NULL, no_argument, NULL, 's'},
 650         {0, 0, 0, 0}}, NULL));
 651
 652         switch (option) {
 653             case -1:
 654                 goto getopt;
 655
 656             case ':':
 657             case '?':
 658                 fprintf(stderr,
 659                     "usage: cycript [-c]"
 660 #ifdef CY_ATTACH
 661                     " [-p <pid|name>]"
 662 #endif
 663                     " [-r <host:port>]"
 664                     " [<script> [<arg>...]]\n"
 665                 );
 666                 return 1;
 667
 668             target:
 669                 if (!target)
 670                     target = true;
 671                 else {
 672                     fprintf(stderr, "only one of -[c"
 673 #ifdef CY_ATTACH
 674                     "p"
 675 #endif
 676                     "r] may be used at a time\n");
 677                     return 1;
 678                 }
 679             break;
 680
 681             case 'c':
 682                 compile = true;
 683             goto target;
 684
 685             case 'g':
 686                 if (false);
 687                 else if (strcmp(optarg, "rename") == 0)
 688                     options.verbose_ = true;
 689 #if YYDEBUG
 690                 else if (strcmp(optarg, "bison") == 0)
 691                     bison_ = true;
 692 #endif
 693                 else {
 694                     fprintf(stderr, "invalid name for -g\n");
 695                     return 1;
 696                 }
 697             break;
 698
 699             case 'n':
 700                 if (false);
 701                 else if (strcmp(optarg, "minify") == 0)
 702                     pretty_ = true;
 703                 else {
 704                     fprintf(stderr, "invalid name for -n\n");
 705                     return 1;
 706                 }
 707             break;
 708
 709 #ifdef CY_ATTACH
 710             case 'p': {
 711                 size_t size(strlen(optarg));
 712                 char *end;
 713
 714                 pid = strtoul(optarg, &end, 0);
 715                 if (optarg + size != end) {
 716                     // XXX: arg needs to be escaped in some horrendous way of doom
 717                     // XXX: this is a memory leak now because I just don't care enough
 718                     char *command;
 719                     asprintf(&command, "ps axc|sed -e '/^ *[0-9]/{s/^ *\\([0-9]*\\)\\( *[^ ]*\\)\\{3\\} *-*\\([^ ]*\\)/\\3 \\1/;/^%s /{s/^[^ ]* //;q;};};d'", optarg);
 720
 721                     if (FILE *pids = popen(command, "r")) {
 722                         char value[32];
 723                         size = 0;
 724
 725                         for (;;) {
 726                             size_t read(fread(value + size, 1, sizeof(value) - size, pids));
 727                             if (read == 0)
 728                                 break;
 729                             else {
 730                                 size += read;
 731                                 if (size == sizeof(value))
 732                                     goto fail;
 733                             }
 734                         }
 735
 736                       size:
 737                         if (size == 0)
 738                             goto fail;
 739                         if (value[size - 1] == '\n') {
 740                             --size;
 741                             goto size;
 742                         }
 743
 744                         value[size] = '\0';
 745                         size = strlen(value);
 746                         pid = strtoul(value, &end, 0);
 747                         if (value + size != end) fail:
 748                             pid = _not(pid_t);
 749                         _syscall(pclose(pids));
 750                     }
 751
 752                     if (pid == _not(pid_t)) {
 753                         fprintf(stderr, "unable to find process `%s' using ps\n", optarg);
 754                         return 1;
 755                     }
 756                 }
 757             } goto target;
 758 #endif
 759
 760             case 'r': {
 761                 //size_t size(strlen(optarg));
 762
 763                 char *colon(strrchr(optarg, ':'));
 764                 if (colon == NULL) {
 765                     fprintf(stderr, "missing colon in hostspec\n");
 766                     return 1;
 767                 }
 768
 769                 /*char *end;
 770                 port = strtoul(colon + 1, &end, 10);
 771                 if (end != optarg + size) {
 772                     fprintf(stderr, "invalid port in hostspec\n");
 773                     return 1;
 774                 }*/
 775
 776                 host = optarg;
 777                 *colon = '\0';
 778                 port = colon + 1;
 779             } goto target;
 780
 781             case 's':
 782                 strict_ = true;
 783             break;
 784
 785             default:
 786                 _assert(false);
 787         }
 788     }
 789
 790   getopt:
 791     argc -= optind;
 792     argv += optind;
 793
 794     const char *script;
 795
 796 #ifdef CY_ATTACH
 797     if (pid != _not(pid_t) && argc > 1) {
 798         fprintf(stderr, "-p cannot set argv\n");
 799         return 1;
 800     }
 801 #endif
 802
 803     if (argc == 0)
 804         script = NULL;
 805     else {
 806 #ifdef CY_EXECUTE
 807         // XXX: const_cast?! wtf gcc :(
 808         CYSetArgs(argc - 1, const_cast<const char **>(argv + 1));
 809 #endif
 810         script = argv[0];
 811         if (strcmp(script, "-") == 0)
 812             script = NULL;
 813     }
 814
 815 #ifdef CY_ATTACH
 816     if (pid == _not(pid_t))
 817         client_ = -1;
 818     else {
 819         struct Socket {
 820             int fd_;
 821
 822             Socket(int fd) :
 823                 fd_(fd)
 824             {
 825             }
 826
 827             ~Socket() {
 828                 close(fd_);
 829             }
 830
 831             operator int() {
 832                 return fd_;
 833             }
 834         } server(_syscall(socket(PF_UNIX, SOCK_STREAM, 0)));
 835
 836         struct sockaddr_un address;
 837         memset(&address, 0, sizeof(address));
 838         address.sun_family = AF_UNIX;
 839
 840         const char *tmp;
 841 #if defined(__APPLE__) && (defined(__arm__) || defined(__arm64__))
 842         tmp = "/Library/Caches";
 843 #else
 844         tmp = "/tmp";
 845 #endif
 846
 847         sprintf(address.sun_path, "%s/.s.cy.%u", tmp, getpid());
 848         unlink(address.sun_path);
 849
 850         struct File {
 851             const char *path_;
 852
 853             File(const char *path) :
 854                 path_(path)
 855             {
 856             }
 857
 858             ~File() {
 859                 unlink(path_);
 860             }
 861         } file(address.sun_path);
 862
 863         _syscall(bind(server, reinterpret_cast<sockaddr *>(&address), SUN_LEN(&address)));
 864         _syscall(chmod(address.sun_path, 0777));
 865
 866         _syscall(listen(server, 1));
 867         InjectLibrary(pid, 1, (const char *[]) {address.sun_path, NULL});
 868         client_ = _syscall(accept(server, NULL, NULL));
 869     }
 870 #else
 871     client_ = -1;
 872 #endif
 873
 874     if (client_ == -1 && host != NULL && port != NULL) {
 875         struct addrinfo hints;
 876         memset(&hints, 0, sizeof(hints));
 877         hints.ai_family = AF_UNSPEC;
 878         hints.ai_socktype = SOCK_STREAM;
 879         hints.ai_protocol = 0;
 880         hints.ai_flags = 0;
 881
 882         struct addrinfo *infos;
 883         _syscall(getaddrinfo(host, port, &hints, &infos));
 884
 885         _assert(infos != NULL); try {
 886             for (struct addrinfo *info(infos); info != NULL; info = info->ai_next) {
 887                 int client(_syscall(socket(info->ai_family, info->ai_socktype, info->ai_protocol))); try {
 888                     _syscall(connect(client, info->ai_addr, info->ai_addrlen));
 889                     client_ = client;
 890                     break;
 891                 } catch (...) {
 892                     _syscall(close(client));
 893                     throw;
 894                 }
 895             }
 896         } catch (...) {
 897             freeaddrinfo(infos);
 898             throw;
 899         }
 900     }
 901
 902     if (script == NULL && tty)
 903         Console(options);
 904     else {
 905         CYLocalPool pool;
 906
 907         std::istream *stream;
 908         if (script == NULL) {
 909             stream = &std::cin;
 910             script = "<stdin>";
 911         } else {
 912             stream = new std::fstream(script, std::ios::in | std::ios::binary);
 913             _assert(!stream->fail());
 914         }
 915
 916         CYDriver driver(*stream, script);
 917         cy::parser parser(driver);
 918         Setup(driver, parser);
 919
 920         if (parser.parse() != 0 || !driver.errors_.empty()) {
 921             for (CYDriver::Errors::const_iterator i(driver.errors_.begin()); i != driver.errors_.end(); ++i)
 922                 std::cerr << i->location_.begin << ": " << i->message_ << std::endl;
 923         } else if (driver.program_ != NULL) {
 924             std::ostringstream str;
 925             CYOutput out(str, options);
 926             Setup(out, driver, options, true);
 927             out << *driver.program_;
 928             std::string code(str.str());
 929             if (compile)
 930                 std::cout << code;
 931             else
 932                 Run(client_, false, code, &std::cout);
 933         }
 934     }
 935
 936     return 0;
 937 }
 938
 939 int main(int argc, char * const argv[], char const * const envp[]) {
 940     try {
 941         return Main(argc, argv, envp);
 942     } catch (const CYException &error) {
 943         CYPool pool;
 944         fprintf(stderr, "%s\n", error.PoolCString(pool));
 945         return 1;
 946     }
 947 }