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_->code_);
 230     _assert(statement != NULL);
 231     _assert(statement->next_ == NULL);
 232
 233     CYExpress *express(dynamic_cast<CYExpress *>(driver.program_->code_));
 234     _assert(express != NULL);
 235
 236     CYParenthetical *parenthetical(dynamic_cast<CYParenthetical *>(express->expression_));
 237     _assert(parenthetical != NULL);
 238
 239     return parenthetical->expression_;
 240 }
 241
 242 static int client_;
 243
 244 static char **Complete(const char *word, int start, int end) {
 245     rl_attempted_completion_over = ~0;
 246
 247     CYLocalPool pool;
 248
 249     std::string line(rl_line_buffer, start);
 250     std::istringstream stream(command_ + line);
 251     CYDriver driver(stream);
 252
 253     driver.auto_ = true;
 254
 255     cy::parser parser(driver);
 256     Setup(driver, parser);
 257
 258     if (parser.parse() != 0 || !driver.errors_.empty())
 259         return NULL;
 260
 261     if (driver.mode_ == CYDriver::AutoNone)
 262         return NULL;
 263
 264     CYExpression *expression;
 265
 266     CYOptions options;
 267     CYContext context(options);
 268
 269     std::ostringstream prefix;
 270
 271     switch (driver.mode_) {
 272         case CYDriver::AutoPrimary:
 273             expression = $ CYThis();
 274         break;
 275
 276         case CYDriver::AutoDirect:
 277             expression = driver.context_;
 278         break;
 279
 280         case CYDriver::AutoIndirect:
 281             expression = $ CYIndirect(driver.context_);
 282         break;
 283
 284         case CYDriver::AutoMessage: {
 285             CYDriver::Context &thing(driver.contexts_.back());
 286             expression = $M($C1($V("object_getClass"), thing.context_), $S("messages"));
 287             for (CYDriver::Context::Words::const_iterator part(thing.words_.begin()); part != thing.words_.end(); ++part)
 288                 prefix << (*part)->word_ << ':';
 289         } break;
 290
 291         default:
 292             _assert(false);
 293     }
 294
 295     std::string begin(prefix.str());
 296
 297     driver.program_ = $ CYProgram($ CYExpress($C3(ParseExpression(
 298     "   function(object, prefix, word) {\n"
 299     "       var names = [];\n"
 300     "       var before = prefix.length;\n"
 301     "       prefix += word;\n"
 302     "       var entire = prefix.length;\n"
 303     "       for (var name in object)\n"
 304     "           if (name.substring(0, entire) == prefix)\n"
 305     "               names.push(name.substr(before));\n"
 306     "       return names;\n"
 307     "   }\n"
 308     ), expression, $S(begin.c_str()), $S(word))));
 309
 310     driver.program_->Replace(context);
 311
 312     std::stringbuf str;
 313     CYOutput out(str, options);
 314     out << *driver.program_;
 315
 316     std::string code(str.str());
 317     CYUTF8String json(Run(pool, client_, code));
 318     // XXX: if this fails we should not try to parse it
 319
 320     CYExpression *result(ParseExpression(json));
 321     if (result == NULL)
 322         return NULL;
 323
 324     CYArray *array(dynamic_cast<CYArray *>(result->Primitive(context)));
 325     if (array == NULL) {
 326         *out_ << '\n';
 327         Output(false, json, out_);
 328         rl_forced_update_display();
 329         return NULL;
 330     }
 331
 332     // XXX: use an std::set?
 333     typedef std::vector<std::string> Completions;
 334     Completions completions;
 335
 336     std::string common;
 337     bool rest(false);
 338
 339     CYForEach (element, array->elements_) {
 340         CYString *string(dynamic_cast<CYString *>(element->value_));
 341         _assert(string != NULL);
 342
 343         std::string completion;
 344         if (string->size_ != 0)
 345             completion.assign(string->value_, string->size_);
 346         else if (driver.mode_ == CYDriver::AutoMessage)
 347             completion = "]";
 348         else
 349             continue;
 350
 351         completions.push_back(completion);
 352
 353         if (!rest) {
 354             common = completion;
 355             rest = true;
 356         } else {
 357             size_t limit(completion.size()), size(common.size());
 358             if (size > limit)
 359                 common = common.substr(0, limit);
 360             else
 361                 limit = size;
 362             for (limit = 0; limit != size; ++limit)
 363                 if (common[limit] != completion[limit])
 364                     break;
 365             if (limit != size)
 366                 common = common.substr(0, limit);
 367         }
 368     }
 369
 370     size_t count(completions.size());
 371     if (count == 0)
 372         return NULL;
 373
 374     size_t colon(common.find(':'));
 375     if (colon != std::string::npos)
 376         common = common.substr(0, colon + 1);
 377     if (completions.size() == 1)
 378         common += ' ';
 379
 380     char **results(reinterpret_cast<char **>(malloc(sizeof(char *) * (count + 2))));
 381
 382     results[0] = strdup(common.c_str());
 383     size_t index(0);
 384     for (Completions::const_iterator i(completions.begin()); i != completions.end(); ++i)
 385         results[++index] = strdup(i->c_str());
 386     results[count + 1] = NULL;
 387
 388     return results;
 389 }
 390
 391 // need char *, not const char *
 392 static char name_[] = "cycript";
 393 static char break_[] = " \t\n\"\\'`@><=;|&{(" ")}" ".:[]";
 394
 395 class History {
 396   private:
 397     std::string histfile_;
 398     size_t histlines_;
 399
 400   public:
 401     History(std::string histfile) :
 402         histfile_(histfile),
 403         histlines_(0)
 404     {
 405         read_history(histfile_.c_str());
 406     }
 407
 408     ~History() {
 409         if (append_history$ != NULL) {
 410             int fd(_syscall(open(histfile_.c_str(), O_CREAT | O_WRONLY, 0600)));
 411             _syscall(close(fd));
 412             _assert((*append_history$)(histlines_, histfile_.c_str()) == 0);
 413         } else {
 414             _assert(write_history(histfile_.c_str()) == 0);
 415         }
 416     }
 417
 418     void operator +=(const std::string &command) {
 419         add_history(command.c_str());
 420         ++histlines_;
 421     }
 422 };
 423
 424 static void Console(CYOptions &options) {
 425     std::string basedir;
 426     if (const char *home = getenv("HOME"))
 427         basedir = home;
 428     else {
 429         passwd *passwd;
 430         if (const char *username = getenv("LOGNAME"))
 431             passwd = getpwnam(username);
 432         else
 433             passwd = getpwuid(getuid());
 434         basedir = passwd->pw_dir;
 435     }
 436
 437     basedir += "/.cycript";
 438     mkdir(basedir.c_str(), 0700);
 439
 440     rl_initialize();
 441     rl_readline_name = name_;
 442
 443     History history(basedir + "/history");
 444
 445     bool bypass(false);
 446     bool debug(false);
 447     bool expand(false);
 448     bool lower(true);
 449     bool syntax(true);
 450
 451     out_ = &std::cout;
 452
 453     // rl_completer_word_break_characters is broken in libedit
 454     rl_basic_word_break_characters = break_;
 455
 456     rl_completer_word_break_characters = break_;
 457     rl_attempted_completion_function = &Complete;
 458     rl_bind_key('\t', rl_complete);
 459
 460     struct sigaction action;
 461     sigemptyset(&action.sa_mask);
 462     action.sa_handler = &sigint;
 463     action.sa_flags = 0;
 464     sigaction(SIGINT, &action, NULL);
 465
 466     restart: for (;;) {
 467         command_.clear();
 468         std::vector<std::string> lines;
 469
 470         bool extra(false);
 471         const char *prompt("cy# ");
 472
 473         if (setjmp(ctrlc_) != 0) {
 474             mode_ = Working;
 475             *out_ << std::endl;
 476             goto restart;
 477         }
 478
 479       read:
 480
 481 #if RL_READLINE_VERSION >= 0x0600
 482         if (syntax)
 483             rl_redisplay_function = CYDisplayUpdate;
 484         else
 485             rl_redisplay_function = rl_redisplay;
 486 #endif
 487
 488         mode_ = Parsing;
 489         char *line(readline(prompt));
 490         mode_ = Working;
 491
 492         if (line == NULL) {
 493             *out_ << std::endl;
 494             break;
 495         } else if (line[0] == '\0')
 496             goto read;
 497
 498         if (!extra) {
 499             extra = true;
 500             if (line[0] == '?') {
 501                 std::string data(line + 1);
 502                 if (data == "bypass") {
 503                     bypass = !bypass;
 504                     *out_ << "bypass == " << (bypass ? "true" : "false") << std::endl;
 505                 } else if (data == "debug") {
 506                     debug = !debug;
 507                     *out_ << "debug == " << (debug ? "true" : "false") << std::endl;
 508                 } else if (data == "destroy") {
 509                     CYDestroyContext();
 510                 } else if (data == "gc") {
 511                     *out_ << "collecting... " << std::flush;
 512                     CYGarbageCollect(CYGetJSContext());
 513                     *out_ << "done." << std::endl;
 514                 } else if (data == "exit") {
 515                     return;
 516                 } else if (data == "expand") {
 517                     expand = !expand;
 518                     *out_ << "expand == " << (expand ? "true" : "false") << std::endl;
 519                 } else if (data == "lower") {
 520                     lower = !lower;
 521                     *out_ << "lower == " << (lower ? "true" : "false") << std::endl;
 522                 } else if (data == "syntax") {
 523                     syntax = !syntax;
 524                     *out_ << "syntax == " << (syntax ? "true" : "false") << std::endl;
 525                 }
 526                 command_ = line;
 527                 history += command_;
 528                 goto restart;
 529             }
 530         }
 531
 532         command_ += line;
 533         command_ += "\n";
 534
 535         char *begin(line), *end(line + strlen(line));
 536         while (char *nl = reinterpret_cast<char *>(memchr(begin, '\n', end - begin))) {
 537             *nl = '\0';
 538             lines.push_back(begin);
 539             begin = nl + 1;
 540         }
 541
 542         lines.push_back(begin);
 543
 544         free(line);
 545
 546         std::string code;
 547
 548         if (bypass)
 549             code = command_;
 550         else {
 551             CYLocalPool pool;
 552
 553             std::istringstream stream(command_);
 554             CYDriver driver(stream);
 555
 556             cy::parser parser(driver);
 557             Setup(driver, parser);
 558
 559             if (parser.parse() != 0 || !driver.errors_.empty()) {
 560                 for (CYDriver::Errors::const_iterator error(driver.errors_.begin()); error != driver.errors_.end(); ++error) {
 561                     CYPosition begin(error->location_.begin);
 562                     if (begin.line != lines.size() + 1 || error->warning_) {
 563                         CYPosition end(error->location_.end);
 564
 565                         if (begin.line != lines.size()) {
 566                             std::cerr << "  | ";
 567                             std::cerr << lines[begin.line - 1] << std::endl;
 568                         }
 569
 570                         std::cerr << "....";
 571                         for (size_t i(0); i != begin.column; ++i)
 572                             std::cerr << '.';
 573                         if (begin.line != end.line || begin.column == end.column)
 574                             std::cerr << '^';
 575                         else for (size_t i(0), e(end.column - begin.column); i != e; ++i)
 576                             std::cerr << '^';
 577                         std::cerr << std::endl;
 578
 579                         std::cerr << "  | ";
 580                         std::cerr << error->message_ << std::endl;
 581
 582                         history += command_.substr(0, command_.size() - 1);
 583                         goto restart;
 584                     }
 585                 }
 586
 587                 driver.errors_.clear();
 588
 589                 prompt = "cy> ";
 590                 goto read;
 591             }
 592
 593             if (driver.program_ == NULL)
 594                 goto restart;
 595
 596             std::stringbuf str;
 597             CYOutput out(str, options);
 598             Setup(out, driver, options, lower);
 599             out << *driver.program_;
 600             code = str.str();
 601         }
 602
 603         history += command_.substr(0, command_.size() - 1);
 604
 605         if (debug) {
 606             std::cout << "cy= ";
 607             Write(syntax, code.c_str(), code.size(), std::cout);
 608             std::cout << std::endl;
 609         }
 610
 611         Run(client_, syntax, code, out_, expand);
 612     }
 613 }
 614
 615 void InjectLibrary(pid_t, int, const char *[]);
 616
 617 int Main(int argc, char * const argv[], char const * const envp[]) {
 618     bool tty(isatty(STDIN_FILENO));
 619     bool compile(false);
 620     bool target(false);
 621     CYOptions options;
 622
 623     append_history$ = (int (*)(int, const char *)) (dlsym(RTLD_DEFAULT, "append_history"));
 624
 625 #ifdef CY_ATTACH
 626     pid_t pid(_not(pid_t));
 627 #endif
 628
 629     const char *host(NULL);
 630     const char *port(NULL);
 631
 632     optind = 1;
 633
 634     for (;;) {
 635         int option(getopt_long(argc, argv,
 636             "c"
 637             "g:"
 638             "n:"
 639 #ifdef CY_ATTACH
 640             "p:"
 641 #endif
 642             "r:"
 643             "s"
 644         , (const struct option[]) {
 645             {NULL, no_argument, NULL, 'c'},
 646             {NULL, required_argument, NULL, 'g'},
 647             {NULL, required_argument, NULL, 'n'},
 648 #ifdef CY_ATTACH
 649             {NULL, required_argument, NULL, 'p'},
 650 #endif
 651             {NULL, required_argument, NULL, 'r'},
 652             {NULL, no_argument, NULL, 's'},
 653         {0, 0, 0, 0}}, NULL));
 654
 655         switch (option) {
 656             case -1:
 657                 goto getopt;
 658
 659             case ':':
 660             case '?':
 661                 fprintf(stderr,
 662                     "usage: cycript [-c]"
 663 #ifdef CY_ATTACH
 664                     " [-p <pid|name>]"
 665 #endif
 666                     " [-r <host:port>]"
 667                     " [<script> [<arg>...]]\n"
 668                 );
 669                 return 1;
 670
 671             target:
 672                 if (!target)
 673                     target = true;
 674                 else {
 675                     fprintf(stderr, "only one of -[c"
 676 #ifdef CY_ATTACH
 677                     "p"
 678 #endif
 679                     "r] may be used at a time\n");
 680                     return 1;
 681                 }
 682             break;
 683
 684             case 'c':
 685                 compile = true;
 686             goto target;
 687
 688             case 'g':
 689                 if (false);
 690                 else if (strcmp(optarg, "rename") == 0)
 691                     options.verbose_ = true;
 692 #if YYDEBUG
 693                 else if (strcmp(optarg, "bison") == 0)
 694                     bison_ = true;
 695 #endif
 696                 else {
 697                     fprintf(stderr, "invalid name for -g\n");
 698                     return 1;
 699                 }
 700             break;
 701
 702             case 'n':
 703                 if (false);
 704                 else if (strcmp(optarg, "minify") == 0)
 705                     pretty_ = true;
 706                 else {
 707                     fprintf(stderr, "invalid name for -n\n");
 708                     return 1;
 709                 }
 710             break;
 711
 712 #ifdef CY_ATTACH
 713             case 'p': {
 714                 size_t size(strlen(optarg));
 715                 char *end;
 716
 717                 pid = strtoul(optarg, &end, 0);
 718                 if (optarg + size != end) {
 719                     // XXX: arg needs to be escaped in some horrendous way of doom
 720                     // XXX: this is a memory leak now because I just don't care enough
 721                     char *command;
 722                     asprintf(&command, "ps axc|sed -e '/^ *[0-9]/{s/^ *\\([0-9]*\\)\\( *[^ ]*\\)\\{3\\} *-*\\([^ ]*\\)/\\3 \\1/;/^%s /{s/^[^ ]* //;q;};};d'", optarg);
 723
 724                     if (FILE *pids = popen(command, "r")) {
 725                         char value[32];
 726                         size = 0;
 727
 728                         for (;;) {
 729                             size_t read(fread(value + size, 1, sizeof(value) - size, pids));
 730                             if (read == 0)
 731                                 break;
 732                             else {
 733                                 size += read;
 734                                 if (size == sizeof(value))
 735                                     goto fail;
 736                             }
 737                         }
 738
 739                       size:
 740                         if (size == 0)
 741                             goto fail;
 742                         if (value[size - 1] == '\n') {
 743                             --size;
 744                             goto size;
 745                         }
 746
 747                         value[size] = '\0';
 748                         size = strlen(value);
 749                         pid = strtoul(value, &end, 0);
 750                         if (value + size != end) fail:
 751                             pid = _not(pid_t);
 752                         _syscall(pclose(pids));
 753                     }
 754
 755                     if (pid == _not(pid_t)) {
 756                         fprintf(stderr, "unable to find process `%s' using ps\n", optarg);
 757                         return 1;
 758                     }
 759                 }
 760             } goto target;
 761 #endif
 762
 763             case 'r': {
 764                 //size_t size(strlen(optarg));
 765
 766                 char *colon(strrchr(optarg, ':'));
 767                 if (colon == NULL) {
 768                     fprintf(stderr, "missing colon in hostspec\n");
 769                     return 1;
 770                 }
 771
 772                 /*char *end;
 773                 port = strtoul(colon + 1, &end, 10);
 774                 if (end != optarg + size) {
 775                     fprintf(stderr, "invalid port in hostspec\n");
 776                     return 1;
 777                 }*/
 778
 779                 host = optarg;
 780                 *colon = '\0';
 781                 port = colon + 1;
 782             } goto target;
 783
 784             case 's':
 785                 strict_ = true;
 786             break;
 787
 788             default:
 789                 _assert(false);
 790         }
 791     }
 792
 793   getopt:
 794     argc -= optind;
 795     argv += optind;
 796
 797     const char *script;
 798
 799 #ifdef CY_ATTACH
 800     if (pid != _not(pid_t) && argc > 1) {
 801         fprintf(stderr, "-p cannot set argv\n");
 802         return 1;
 803     }
 804 #endif
 805
 806     if (argc == 0)
 807         script = NULL;
 808     else {
 809 #ifdef CY_EXECUTE
 810         // XXX: const_cast?! wtf gcc :(
 811         CYSetArgs(argc - 1, const_cast<const char **>(argv + 1));
 812 #endif
 813         script = argv[0];
 814         if (strcmp(script, "-") == 0)
 815             script = NULL;
 816     }
 817
 818 #ifdef CY_ATTACH
 819     if (pid == _not(pid_t))
 820         client_ = -1;
 821     else {
 822         struct Socket {
 823             int fd_;
 824
 825             Socket(int fd) :
 826                 fd_(fd)
 827             {
 828             }
 829
 830             ~Socket() {
 831                 close(fd_);
 832             }
 833
 834             operator int() {
 835                 return fd_;
 836             }
 837         } server(_syscall(socket(PF_UNIX, SOCK_STREAM, 0)));
 838
 839         struct sockaddr_un address;
 840         memset(&address, 0, sizeof(address));
 841         address.sun_family = AF_UNIX;
 842
 843         const char *tmp;
 844 #if defined(__APPLE__) && (defined(__arm__) || defined(__arm64__))
 845         tmp = "/Library/Caches";
 846 #else
 847         tmp = "/tmp";
 848 #endif
 849
 850         sprintf(address.sun_path, "%s/.s.cy.%u", tmp, getpid());
 851         unlink(address.sun_path);
 852
 853         struct File {
 854             const char *path_;
 855
 856             File(const char *path) :
 857                 path_(path)
 858             {
 859             }
 860
 861             ~File() {
 862                 unlink(path_);
 863             }
 864         } file(address.sun_path);
 865
 866         _syscall(bind(server, reinterpret_cast<sockaddr *>(&address), SUN_LEN(&address)));
 867         _syscall(chmod(address.sun_path, 0777));
 868
 869         _syscall(listen(server, 1));
 870         InjectLibrary(pid, 1, (const char *[]) {address.sun_path, NULL});
 871         client_ = _syscall(accept(server, NULL, NULL));
 872     }
 873 #else
 874     client_ = -1;
 875 #endif
 876
 877     if (client_ == -1 && host != NULL && port != NULL) {
 878         struct addrinfo hints;
 879         memset(&hints, 0, sizeof(hints));
 880         hints.ai_family = AF_UNSPEC;
 881         hints.ai_socktype = SOCK_STREAM;
 882         hints.ai_protocol = 0;
 883         hints.ai_flags = 0;
 884
 885         struct addrinfo *infos;
 886         _syscall(getaddrinfo(host, port, &hints, &infos));
 887
 888         _assert(infos != NULL); try {
 889             for (struct addrinfo *info(infos); info != NULL; info = info->ai_next) {
 890                 int client(_syscall(socket(info->ai_family, info->ai_socktype, info->ai_protocol))); try {
 891                     _syscall(connect(client, info->ai_addr, info->ai_addrlen));
 892                     client_ = client;
 893                     break;
 894                 } catch (...) {
 895                     _syscall(close(client));
 896                     throw;
 897                 }
 898             }
 899         } catch (...) {
 900             freeaddrinfo(infos);
 901             throw;
 902         }
 903     }
 904
 905     if (script == NULL && tty)
 906         Console(options);
 907     else {
 908         CYLocalPool pool;
 909
 910         std::istream *stream;
 911         if (script == NULL) {
 912             stream = &std::cin;
 913             script = "<stdin>";
 914         } else {
 915             stream = new std::fstream(script, std::ios::in | std::ios::binary);
 916             _assert(!stream->fail());
 917         }
 918
 919         CYDriver driver(*stream, script);
 920         cy::parser parser(driver);
 921         Setup(driver, parser);
 922
 923         if (parser.parse() != 0 || !driver.errors_.empty()) {
 924             for (CYDriver::Errors::const_iterator i(driver.errors_.begin()); i != driver.errors_.end(); ++i)
 925                 std::cerr << i->location_.begin << ": " << i->message_ << std::endl;
 926         } else if (driver.program_ != NULL) {
 927             std::stringbuf str;
 928             CYOutput out(str, options);
 929             Setup(out, driver, options, true);
 930             out << *driver.program_;
 931             std::string code(str.str());
 932             if (compile)
 933                 std::cout << code;
 934             else
 935                 Run(client_, false, code, &std::cout);
 936         }
 937     }
 938
 939     return 0;
 940 }
 941
 942 int main(int argc, char * const argv[], char const * const envp[]) {
 943     try {
 944         return Main(argc, argv, envp);
 945     } catch (const CYException &error) {
 946         CYPool pool;
 947         fprintf(stderr, "%s\n", error.PoolCString(pool));
 948         return 1;
 949     }
 950 }