Console.cpp

   1 /* Cycript - Optimizing JavaScript Compiler/Runtime
   2  * Copyright (C) 2009-2013  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU General Public License, Version 3 {{{ */
   6 /*
   7  * Cycript is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published
   9  * by the Free Software Foundation, either version 3 of the License,
  10  * or (at your option) any later version.
  11  *
  12  * Cycript is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with Cycript.  If not, see <http://www.gnu.org/licenses/>.
  19 **/
  20 /* }}} */
  21
  22 #include "cycript.hpp"
  23
  24 #ifdef CY_EXECUTE
  25 #include "JavaScript.hpp"
  26 #endif
  27
  28 #include <cstdio>
  29 #include <sstream>
  30
  31 #include <setjmp.h>
  32
  33 #ifdef HAVE_READLINE_H
  34 #include <readline.h>
  35 #else
  36 #include <readline/readline.h>
  37 #endif
  38
  39 #ifdef HAVE_HISTORY_H
  40 #include <history.h>
  41 #else
  42 #include <readline/history.h>
  43 #endif
  44
  45 #include <sys/mman.h>
  46
  47 #include <errno.h>
  48 #include <unistd.h>
  49
  50 #include <sys/socket.h>
  51 #include <sys/types.h>
  52 #include <sys/stat.h>
  53 #include <fcntl.h>
  54 #include <netdb.h>
  55
  56 #include <sys/types.h>
  57 #include <sys/socket.h>
  58 #include <netinet/in.h>
  59 #include <sys/un.h>
  60 #include <pwd.h>
  61
  62 #include <apr_getopt.h>
  63 #include <apr_pools.h>
  64 #include <apr_strings.h>
  65
  66 #include <dlfcn.h>
  67
  68 #include "Display.hpp"
  69 #include "Replace.hpp"
  70
  71 #include "Cycript.tab.hh"
  72 #include "Driver.hpp"
  73
  74 static volatile enum {
  75     Working,
  76     Parsing,
  77     Running,
  78     Sending,
  79     Waiting,
  80 } mode_;
  81
  82 static jmp_buf ctrlc_;
  83
  84 static void sigint(int) {
  85     switch (mode_) {
  86         case Working:
  87             return;
  88         case Parsing:
  89             longjmp(ctrlc_, 1);
  90         case Running:
  91             throw "*** Ctrl-C";
  92         case Sending:
  93             return;
  94         case Waiting:
  95             return;
  96     }
  97 }
  98
  99 #if YYDEBUG
 100 static bool bison_;
 101 #endif
 102 static bool strict_;
 103 static bool pretty_;
 104
 105 void Setup(CYDriver &driver, cy::parser &parser) {
 106 #if YYDEBUG
 107     if (bison_)
 108         parser.set_debug_level(1);
 109 #endif
 110     if (strict_)
 111         driver.strict_ = true;
 112 }
 113
 114 void Setup(CYOutput &out, CYDriver &driver, CYOptions &options) {
 115     out.pretty_ = pretty_;
 116     CYContext context(options);
 117     driver.program_->Replace(context);
 118 }
 119
 120 static CYUTF8String Run(CYPool &pool, int client, CYUTF8String code) {
 121     const char *json;
 122     uint32_t size;
 123
 124     if (client == -1) {
 125         mode_ = Running;
 126 #ifdef CY_EXECUTE
 127         json = CYExecute(pool, code);
 128 #else
 129         json = NULL;
 130 #endif
 131         mode_ = Working;
 132         if (json == NULL)
 133             size = 0;
 134         else
 135             size = strlen(json);
 136     } else {
 137         mode_ = Sending;
 138         size = code.size;
 139         _assert(CYSendAll(client, &size, sizeof(size)));
 140         _assert(CYSendAll(client, code.data, code.size));
 141         mode_ = Waiting;
 142         _assert(CYRecvAll(client, &size, sizeof(size)));
 143         if (size == _not(uint32_t))
 144             json = NULL;
 145         else {
 146             char *temp(new(pool) char[size + 1]);
 147             _assert(CYRecvAll(client, temp, size));
 148             temp[size] = '\0';
 149             json = temp;
 150         }
 151         mode_ = Working;
 152     }
 153
 154     return CYUTF8String(json, size);
 155 }
 156
 157 static CYUTF8String Run(CYPool &pool, int client, const std::string &code) {
 158     return Run(pool, client, CYUTF8String(code.c_str(), code.size()));
 159 }
 160
 161 static std::ostream *out_;
 162
 163 static void Write(bool syntax, const char *data, size_t size, std::ostream &out) {
 164     if (syntax)
 165         CYLexerHighlight(data, size, out);
 166     else
 167         out.write(data, size);
 168 }
 169
 170 static void Output(bool syntax, CYUTF8String json, std::ostream *out, bool expand = false) {
 171     const char *data(json.data);
 172     size_t size(json.size);
 173
 174     if (data == NULL || out == NULL)
 175         return;
 176
 177     if (!expand ||
 178         data[0] != '@' && data[0] != '"' && data[0] != '\'' ||
 179         data[0] == '@' && data[1] != '"' && data[1] != '\''
 180     )
 181         Write(syntax, data, size, *out);
 182     else for (size_t i(0); i != size; ++i)
 183         if (data[i] != '\\')
 184             *out << data[i];
 185         else switch(data[++i]) {
 186             case '\0': goto done;
 187             case '\\': *out << '\\'; break;
 188             case '\'': *out << '\''; break;
 189             case '"': *out << '"'; break;
 190             case 'b': *out << '\b'; break;
 191             case 'f': *out << '\f'; break;
 192             case 'n': *out << '\n'; break;
 193             case 'r': *out << '\r'; break;
 194             case 't': *out << '\t'; break;
 195             case 'v': *out << '\v'; break;
 196             default: *out << '\\'; --i; break;
 197         }
 198
 199   done:
 200     *out << std::endl;
 201 }
 202
 203 static void Run(int client, bool syntax, const char *data, size_t size, std::ostream *out = NULL, bool expand = false) {
 204     CYPool pool;
 205     Output(syntax, Run(pool, client, CYUTF8String(data, size)), out, expand);
 206 }
 207
 208 static void Run(int client, bool syntax, std::string &code, std::ostream *out = NULL, bool expand = false) {
 209     Run(client, syntax, code.c_str(), code.size(), out, expand);
 210 }
 211
 212 int (*append_history$)(int, const char *);
 213
 214 static std::string command_;
 215
 216 static CYExpression *ParseExpression(CYUTF8String code) {
 217     std::stringstream stream;
 218     stream << '(' << code << ')';
 219     CYDriver driver(stream);
 220
 221     cy::parser parser(driver);
 222     Setup(driver, parser);
 223
 224     if (parser.parse() != 0 || !driver.errors_.empty())
 225         return NULL;
 226
 227     CYOptions options;
 228     CYContext context(options);
 229
 230     // XXX: this could be replaced with a CYStatement::Primitive()
 231     if (CYExpress *express = dynamic_cast<CYExpress *>(driver.program_->statements_))
 232         return express->expression_->Primitive(context);
 233
 234     return NULL;
 235 }
 236
 237 static int client_;
 238
 239 static char **Complete(const char *word, int start, int end) {
 240     rl_attempted_completion_over = TRUE;
 241
 242     CYLocalPool pool;
 243
 244     std::string line(rl_line_buffer, start);
 245     std::istringstream stream(command_ + line);
 246     CYDriver driver(stream);
 247
 248     driver.auto_ = true;
 249
 250     cy::parser parser(driver);
 251     Setup(driver, parser);
 252
 253     if (parser.parse() != 0 || !driver.errors_.empty())
 254         return NULL;
 255
 256     if (driver.mode_ == CYDriver::AutoNone)
 257         return NULL;
 258
 259     CYExpression *expression;
 260
 261     CYOptions options;
 262     CYContext context(options);
 263
 264     std::ostringstream prefix;
 265
 266     switch (driver.mode_) {
 267         case CYDriver::AutoPrimary:
 268             expression = $ CYThis();
 269         break;
 270
 271         case CYDriver::AutoDirect:
 272             expression = driver.context_;
 273         break;
 274
 275         case CYDriver::AutoIndirect:
 276             expression = $ CYIndirect(driver.context_);
 277         break;
 278
 279         case CYDriver::AutoMessage: {
 280             CYDriver::Context &thing(driver.contexts_.back());
 281             expression = $M($C1($V("object_getClass"), thing.context_), $S("messages"));
 282             for (CYDriver::Context::Words::const_iterator part(thing.words_.begin()); part != thing.words_.end(); ++part)
 283                 prefix << (*part)->word_ << ':';
 284         } break;
 285
 286         default:
 287             _assert(false);
 288     }
 289
 290     std::string begin(prefix.str());
 291
 292     driver.program_ = $ CYProgram($ CYExpress($C3(ParseExpression(
 293     "   function(object, prefix, word) {\n"
 294     "       var names = [];\n"
 295     "       var before = prefix.length;\n"
 296     "       prefix += word;\n"
 297     "       var entire = prefix.length;\n"
 298     "       for (name in object)\n"
 299     "           if (name.substring(0, entire) == prefix)\n"
 300     "               names.push(name.substr(before));\n"
 301     "       return names;\n"
 302     "   }\n"
 303     ), expression, $S(begin.c_str()), $S(word))));
 304
 305     driver.program_->Replace(context);
 306
 307     std::ostringstream str;
 308     CYOutput out(str, options);
 309     out << *driver.program_;
 310
 311     std::string code(str.str());
 312     CYUTF8String json(Run(pool, client_, code));
 313     // XXX: if this fails we should not try to parse it
 314
 315     CYExpression *result(ParseExpression(json));
 316     if (result == NULL)
 317         return NULL;
 318
 319     CYArray *array(dynamic_cast<CYArray *>(result));
 320
 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             _syscall(close(_syscall(open(histfile_.c_str(), O_CREAT | O_WRONLY, 0600))));
 407             _assert((*append_history$)(histlines_, histfile_.c_str()) == 0);
 408         } else {
 409             _assert(write_history(histfile_.c_str()) == 0);
 410         }
 411     }
 412
 413     void operator +=(const std::string &command) {
 414         add_history(command_.c_str());
 415         ++histlines_;
 416     }
 417 };
 418
 419 static void Console(CYOptions &options) {
 420     CYPool pool;
 421
 422     passwd *passwd;
 423     if (const char *username = getenv("LOGNAME"))
 424         passwd = getpwnam(username);
 425     else
 426         passwd = getpwuid(getuid());
 427
 428     std::string basedir(passwd->pw_dir);
 429     basedir += "/.cycript";
 430     mkdir(basedir.c_str(), 0700);
 431
 432     rl_initialize();
 433     rl_readline_name = name_;
 434
 435     History history(basedir + "/history");
 436
 437     bool bypass(false);
 438     bool debug(false);
 439     bool expand(false);
 440     bool syntax(true);
 441
 442     out_ = &std::cout;
 443
 444     // rl_completer_word_break_characters is broken in libedit
 445     rl_basic_word_break_characters = break_;
 446
 447     rl_completer_word_break_characters = break_;
 448     rl_attempted_completion_function = &Complete;
 449     rl_bind_key('\t', rl_complete);
 450
 451     struct sigaction action;
 452     sigemptyset(&action.sa_mask);
 453     action.sa_handler = &sigint;
 454     action.sa_flags = 0;
 455     sigaction(SIGINT, &action, NULL);
 456
 457     restart: for (;;) {
 458         command_.clear();
 459         std::vector<std::string> lines;
 460
 461         bool extra(false);
 462         const char *prompt("cy# ");
 463
 464         if (setjmp(ctrlc_) != 0) {
 465             mode_ = Working;
 466             *out_ << std::endl;
 467             goto restart;
 468         }
 469
 470       read:
 471
 472 #if RL_READLINE_VERSION >= 0x0600
 473         if (syntax) {
 474             rl_prep_term_function = CYDisplayStart;
 475             rl_redisplay_function = CYDisplayUpdate;
 476             rl_deprep_term_function = CYDisplayFinish;
 477         } else {
 478             rl_prep_term_function = rl_prep_terminal;
 479             rl_redisplay_function = rl_redisplay;
 480             rl_deprep_term_function = rl_deprep_terminal;
 481         }
 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 == "expand") {
 505                     expand = !expand;
 506                     *out_ << "expand == " << (expand ? "true" : "false") << std::endl;
 507                 } else if (data == "syntax") {
 508                     syntax = !syntax;
 509                     *out_ << "syntax == " << (syntax ? "true" : "false") << std::endl;
 510                 }
 511                 history += line;
 512                 goto restart;
 513             }
 514         }
 515
 516         command_ += line;
 517
 518         char *begin(line), *end(line + strlen(line));
 519         while (char *nl = reinterpret_cast<char *>(memchr(begin, '\n', end - begin))) {
 520             *nl = '\0';
 521             lines.push_back(begin);
 522             begin = nl + 1;
 523         }
 524
 525         lines.push_back(begin);
 526
 527         free(line);
 528
 529         std::string code;
 530
 531         if (bypass)
 532             code = command_;
 533         else {
 534             CYLocalPool pool;
 535
 536             std::istringstream stream(command_);
 537             CYDriver driver(stream);
 538
 539             cy::parser parser(driver);
 540             Setup(driver, parser);
 541
 542             if (parser.parse() != 0 || !driver.errors_.empty()) {
 543                 for (CYDriver::Errors::const_iterator error(driver.errors_.begin()); error != driver.errors_.end(); ++error) {
 544                     cy::position begin(error->location_.begin);
 545                     if (begin.line != lines.size() || begin.column < lines.back().size() || error->warning_) {
 546                         cy::position end(error->location_.end);
 547
 548                         if (begin.line != lines.size()) {
 549                             std::cerr << "  | ";
 550                             std::cerr << lines[begin.line - 1] << std::endl;
 551                         }
 552
 553                         std::cerr << "....";
 554                         for (size_t i(0); i != begin.column; ++i)
 555                             std::cerr << '.';
 556                         if (begin.line != end.line || begin.column == end.column)
 557                             std::cerr << '^';
 558                         else for (size_t i(0), e(end.column - begin.column); i != e; ++i)
 559                             std::cerr << '^';
 560                         std::cerr << std::endl;
 561
 562                         std::cerr << "  | ";
 563                         std::cerr << error->message_ << std::endl;
 564
 565                         history += command_;
 566                         goto restart;
 567                     }
 568                 }
 569
 570                 driver.errors_.clear();
 571
 572                 command_ += '\n';
 573                 prompt = "cy> ";
 574                 goto read;
 575             }
 576
 577             if (driver.program_ == NULL)
 578                 goto restart;
 579
 580             if (client_ != -1)
 581                 code = command_;
 582             else {
 583                 std::ostringstream str;
 584                 CYOutput out(str, options);
 585                 Setup(out, driver, options);
 586                 out << *driver.program_;
 587                 code = str.str();
 588             }
 589         }
 590
 591         history += command_;
 592
 593         if (debug) {
 594             Write(syntax, code.c_str(), code.size(), std::cout);
 595             std::cout << std::endl;
 596         }
 597
 598         Run(client_, syntax, code, out_, expand);
 599     }
 600 }
 601
 602 static void *Map(const char *path, size_t *psize) {
 603     int fd;
 604     _syscall(fd = open(path, O_RDONLY));
 605
 606     struct stat stat;
 607     _syscall(fstat(fd, &stat));
 608     size_t size(stat.st_size);
 609
 610     *psize = size;
 611
 612     void *base;
 613     _syscall(base = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0));
 614
 615     _syscall(close(fd));
 616     return base;
 617 }
 618
 619 void InjectLibrary(pid_t pid);
 620
 621 int Main(int argc, char const * const argv[], char const * const envp[]) {
 622     _aprcall(apr_initialize());
 623
 624     apr_pool_t *pool;
 625     apr_pool_create(&pool, NULL);
 626
 627     bool tty(isatty(STDIN_FILENO));
 628     bool compile(false);
 629     CYOptions options;
 630
 631     append_history$ = (int (*)(int, const char *)) (dlsym(RTLD_DEFAULT, "append_history"));
 632
 633 #ifdef CY_ATTACH
 634     pid_t pid(_not(pid_t));
 635 #endif
 636
 637     const char *host(NULL);
 638     const char *port(NULL);
 639
 640     apr_getopt_t *state;
 641     _aprcall(apr_getopt_init(&state, pool, argc, argv));
 642
 643     for (;;) {
 644         char opt;
 645         const char *arg;
 646
 647         apr_status_t status(apr_getopt(state,
 648             "cg:n:"
 649 #ifdef CY_ATTACH
 650             "p:"
 651 #endif
 652             "r:"
 653             "s"
 654         , &opt, &arg));
 655
 656         switch (status) {
 657             case APR_EOF:
 658                 goto getopt;
 659             case APR_BADCH:
 660             case APR_BADARG:
 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             default:
 671                 _aprcall(status);
 672         }
 673
 674         switch (opt) {
 675             case 'c':
 676                 compile = true;
 677             break;
 678
 679             case 'g':
 680                 if (false);
 681                 else if (strcmp(arg, "rename") == 0)
 682                     options.verbose_ = true;
 683 #if YYDEBUG
 684                 else if (strcmp(arg, "bison") == 0)
 685                     bison_ = true;
 686 #endif
 687                 else {
 688                     fprintf(stderr, "invalid name for -g\n");
 689                     return 1;
 690                 }
 691             break;
 692
 693             case 'n':
 694                 if (false);
 695                 else if (strcmp(arg, "minify") == 0)
 696                     pretty_ = true;
 697                 else {
 698                     fprintf(stderr, "invalid name for -n\n");
 699                     return 1;
 700                 }
 701             break;
 702
 703 #ifdef CY_ATTACH
 704             case 'p': {
 705                 size_t size(strlen(arg));
 706                 char *end;
 707
 708                 pid = strtoul(arg, &end, 0);
 709                 if (arg + size != end) {
 710                     // XXX: arg needs to be escaped in some horrendous way of doom
 711                     const char *command(apr_pstrcat(pool, "ps axc|sed -e '/^ *[0-9]/{s/^ *\\([0-9]*\\)\\( *[^ ]*\\)\\{3\\} *-*\\([^ ]*\\)/\\3 \\1/;/^", arg, " /{s/^[^ ]* //;q;};};d'", NULL));
 712
 713                     if (FILE *pids = popen(command, "r")) {
 714                         char value[32];
 715                         size = 0;
 716
 717                         for (;;) {
 718                             size_t read(fread(value + size, 1, sizeof(value) - size, pids));
 719                             if (read == 0)
 720                                 break;
 721                             else {
 722                                 size += read;
 723                                 if (size == sizeof(value)) {
 724                                     pid = _not(pid_t);
 725                                     goto fail;
 726                                 }
 727                             }
 728                         }
 729
 730                       size:
 731                         if (size == 0)
 732                             goto fail;
 733                         if (value[size - 1] == '\n') {
 734                             --size;
 735                             goto size;
 736                         }
 737
 738                         value[size] = '\0';
 739                         size = strlen(value);
 740                         pid = strtoul(value, &end, 0);
 741                         if (value + size != end) fail:
 742                             pid = _not(pid_t);
 743                         _syscall(pclose(pids));
 744                     }
 745
 746                     if (pid == _not(pid_t)) {
 747                         fprintf(stderr, "invalid pid for -p\n");
 748                         return 1;
 749                     }
 750                 }
 751             } break;
 752 #endif
 753
 754             case 'r': {
 755                 //size_t size(strlen(arg));
 756
 757                 char *colon(strrchr(arg, ':'));
 758                 if (colon == NULL) {
 759                     fprintf(stderr, "missing colon in hostspec\n");
 760                     return 1;
 761                 }
 762
 763                 /*char *end;
 764                 port = strtoul(colon + 1, &end, 10);
 765                 if (end != arg + size) {
 766                     fprintf(stderr, "invalid port in hostspec\n");
 767                     return 1;
 768                 }*/
 769
 770                 host = arg;
 771                 *colon = '\0';
 772                 port = colon + 1;
 773             } break;
 774
 775             case 's':
 776                 strict_ = true;
 777             break;
 778         }
 779     } getopt:;
 780
 781     const char *script;
 782     int ind(state->ind);
 783
 784 #ifdef CY_ATTACH
 785     if (pid != _not(pid_t) && ind < argc - 1) {
 786         fprintf(stderr, "-p cannot set argv\n");
 787         return 1;
 788     }
 789
 790     if (pid != _not(pid_t) && compile) {
 791         fprintf(stderr, "-p conflicts with -c\n");
 792         return 1;
 793     }
 794 #endif
 795
 796     if (ind == argc)
 797         script = NULL;
 798     else {
 799 #ifdef CY_EXECUTE
 800         // XXX: const_cast?! wtf gcc :(
 801         CYSetArgs(argc - ind - 1, const_cast<const char **>(argv + ind + 1));
 802 #endif
 803         script = argv[ind];
 804         if (strcmp(script, "-") == 0)
 805             script = NULL;
 806     }
 807
 808 #ifdef CY_ATTACH
 809     if (pid != _not(pid_t) && script == NULL && !tty) {
 810         fprintf(stderr, "non-terminal attaching to remote console\n");
 811         return 1;
 812     }
 813 #endif
 814
 815 #ifdef CY_ATTACH
 816     if (pid == _not(pid_t))
 817         client_ = -1;
 818     else {
 819         int server(_syscall(socket(PF_UNIX, SOCK_STREAM, 0))); try {
 820             struct sockaddr_un address;
 821             memset(&address, 0, sizeof(address));
 822             address.sun_family = AF_UNIX;
 823
 824             sprintf(address.sun_path, "/tmp/.s.cy.%u", getpid());
 825
 826             _syscall(bind(server, reinterpret_cast<sockaddr *>(&address), SUN_LEN(&address)));
 827             _syscall(chmod(address.sun_path, 0777));
 828
 829             try {
 830                 _syscall(listen(server, 1));
 831                 InjectLibrary(pid);
 832                 client_ = _syscall(accept(server, NULL, NULL));
 833             } catch (...) {
 834                 // XXX: exception?
 835                 unlink(address.sun_path);
 836                 throw;
 837             }
 838         } catch (...) {
 839             _syscall(close(server));
 840             throw;
 841         }
 842     }
 843 #else
 844     client_ = -1;
 845 #endif
 846
 847     if (client_ == -1 && host != NULL && port != NULL) {
 848         struct addrinfo hints;
 849         memset(&hints, 0, sizeof(hints));
 850         hints.ai_family = AF_UNSPEC;
 851         hints.ai_socktype = SOCK_STREAM;
 852         hints.ai_protocol = 0;
 853         hints.ai_flags = 0;
 854
 855         struct addrinfo *infos;
 856         _syscall(getaddrinfo(host, port, &hints, &infos));
 857
 858         _assert(infos != NULL); try {
 859             for (struct addrinfo *info(infos); info != NULL; info = info->ai_next) {
 860                 int client(_syscall(socket(info->ai_family, info->ai_socktype, info->ai_protocol))); try {
 861                     _syscall(connect(client, info->ai_addr, info->ai_addrlen));
 862                     client_ = client;
 863                     break;
 864                 } catch (...) {
 865                     _syscall(close(client));
 866                     throw;
 867                 }
 868             }
 869         } catch (...) {
 870             freeaddrinfo(infos);
 871             throw;
 872         }
 873     }
 874
 875     if (script == NULL && tty)
 876         Console(options);
 877     else {
 878         CYLocalPool pool;
 879
 880         char *start, *end;
 881         std::istream *indirect;
 882
 883         if (script == NULL) {
 884             start = NULL;
 885             end = NULL;
 886             indirect = &std::cin;
 887         } else {
 888             size_t size;
 889             start = reinterpret_cast<char *>(Map(script, &size));
 890             end = start + size;
 891
 892             if (size >= 2 && start[0] == '#' && start[1] == '!') {
 893                 start += 2;
 894
 895                 if (void *line = memchr(start, '\n', end - start))
 896                     start = reinterpret_cast<char *>(line);
 897                 else
 898                     start = end;
 899             }
 900
 901             indirect = NULL;
 902         }
 903
 904         CYStream direct(start, end);
 905         std::istream &stream(indirect == NULL ? direct : *indirect);
 906         CYDriver driver(stream, script ?: "<stdin>");
 907
 908         cy::parser parser(driver);
 909         Setup(driver, parser);
 910
 911         if (parser.parse() != 0 || !driver.errors_.empty()) {
 912             for (CYDriver::Errors::const_iterator i(driver.errors_.begin()); i != driver.errors_.end(); ++i)
 913                 std::cerr << i->location_.begin << ": " << i->message_ << std::endl;
 914         } else if (driver.program_ != NULL)
 915             if (client_ != -1) {
 916                 // XXX: this code means that you can't pipe to another process
 917                 std::string code(start, end-start);
 918                 Run(client_, false, code, &std::cout);
 919             } else {
 920                 std::ostringstream str;
 921                 CYOutput out(str, options);
 922                 Setup(out, driver, options);
 923                 out << *driver.program_;
 924                 std::string code(str.str());
 925                 if (compile)
 926                     std::cout << code;
 927                 else
 928                     Run(client_, false, code, &std::cout);
 929             }
 930     }
 931
 932     apr_pool_destroy(pool);
 933
 934     return 0;
 935 }
 936
 937 int main(int argc, char const * const argv[], char const * const envp[]) {
 938     apr_status_t status(apr_app_initialize(&argc, &argv, &envp));
 939
 940     if (status != APR_SUCCESS) {
 941         fprintf(stderr, "apr_app_initialize() != APR_SUCCESS\n");
 942         return 1;
 943     } else 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 }