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 static void Console(CYOptions &options) {
 392     CYPool pool;
 393
 394     passwd *passwd;
 395     if (const char *username = getenv("LOGNAME"))
 396         passwd = getpwnam(username);
 397     else
 398         passwd = getpwuid(getuid());
 399
 400     const char *basedir(pool.strcat(passwd->pw_dir, "/.cycript", NULL));
 401     const char *histfile(pool.strcat(basedir, "/history", NULL));
 402     size_t histlines(0);
 403
 404     rl_initialize();
 405     rl_readline_name = name_;
 406
 407     mkdir(basedir, 0700);
 408     read_history(histfile);
 409
 410     bool bypass(false);
 411     bool debug(false);
 412     bool expand(false);
 413     bool syntax(true);
 414
 415     out_ = &std::cout;
 416
 417     // rl_completer_word_break_characters is broken in libedit
 418     rl_basic_word_break_characters = break_;
 419
 420     rl_completer_word_break_characters = break_;
 421     rl_attempted_completion_function = &Complete;
 422     rl_bind_key('\t', rl_complete);
 423
 424     struct sigaction action;
 425     sigemptyset(&action.sa_mask);
 426     action.sa_handler = &sigint;
 427     action.sa_flags = 0;
 428     sigaction(SIGINT, &action, NULL);
 429
 430     restart: for (;;) {
 431         command_.clear();
 432         std::vector<std::string> lines;
 433
 434         bool extra(false);
 435         const char *prompt("cy# ");
 436
 437         if (setjmp(ctrlc_) != 0) {
 438             mode_ = Working;
 439             *out_ << std::endl;
 440             goto restart;
 441         }
 442
 443       read:
 444
 445 #if RL_READLINE_VERSION >= 0x0600
 446         if (syntax) {
 447             rl_prep_term_function = CYDisplayStart;
 448             rl_redisplay_function = CYDisplayUpdate;
 449             rl_deprep_term_function = CYDisplayFinish;
 450         } else {
 451             rl_prep_term_function = rl_prep_terminal;
 452             rl_redisplay_function = rl_redisplay;
 453             rl_deprep_term_function = rl_deprep_terminal;
 454         }
 455 #endif
 456
 457         mode_ = Parsing;
 458         char *line(readline(prompt));
 459         mode_ = Working;
 460
 461         if (line == NULL)
 462             break;
 463         if (line[0] == '\0')
 464             goto read;
 465
 466         if (!extra) {
 467             extra = true;
 468             if (line[0] == '?') {
 469                 std::string data(line + 1);
 470                 if (data == "bypass") {
 471                     bypass = !bypass;
 472                     *out_ << "bypass == " << (bypass ? "true" : "false") << std::endl;
 473                 } else if (data == "debug") {
 474                     debug = !debug;
 475                     *out_ << "debug == " << (debug ? "true" : "false") << std::endl;
 476                 } else if (data == "expand") {
 477                     expand = !expand;
 478                     *out_ << "expand == " << (expand ? "true" : "false") << std::endl;
 479                 } else if (data == "syntax") {
 480                     syntax = !syntax;
 481                     *out_ << "syntax == " << (syntax ? "true" : "false") << std::endl;
 482                 }
 483                 add_history(line);
 484                 ++histlines;
 485                 goto restart;
 486             }
 487         }
 488
 489         command_ += line;
 490
 491         char *begin(line), *end(line + strlen(line));
 492         while (char *nl = reinterpret_cast<char *>(memchr(begin, '\n', end - begin))) {
 493             *nl = '\0';
 494             lines.push_back(begin);
 495             begin = nl + 1;
 496         }
 497
 498         lines.push_back(begin);
 499
 500         free(line);
 501
 502         std::string code;
 503
 504         if (bypass)
 505             code = command_;
 506         else {
 507             CYLocalPool pool;
 508
 509             std::istringstream stream(command_);
 510             CYDriver driver(stream);
 511
 512             cy::parser parser(driver);
 513             Setup(driver, parser);
 514
 515             if (parser.parse() != 0 || !driver.errors_.empty()) {
 516                 for (CYDriver::Errors::const_iterator error(driver.errors_.begin()); error != driver.errors_.end(); ++error) {
 517                     cy::position begin(error->location_.begin);
 518                     if (begin.line != lines.size() || begin.column < lines.back().size() || error->warning_) {
 519                         cy::position end(error->location_.end);
 520
 521                         if (begin.line != lines.size()) {
 522                             std::cerr << "  | ";
 523                             std::cerr << lines[begin.line - 1] << std::endl;
 524                         }
 525
 526                         std::cerr << "....";
 527                         for (size_t i(0); i != begin.column; ++i)
 528                             std::cerr << '.';
 529                         if (begin.line != end.line || begin.column == end.column)
 530                             std::cerr << '^';
 531                         else for (size_t i(0), e(end.column - begin.column); i != e; ++i)
 532                             std::cerr << '^';
 533                         std::cerr << std::endl;
 534
 535                         std::cerr << "  | ";
 536                         std::cerr << error->message_ << std::endl;
 537
 538                         add_history(command_.c_str());
 539                         ++histlines;
 540                         goto restart;
 541                     }
 542                 }
 543
 544                 driver.errors_.clear();
 545
 546                 command_ += '\n';
 547                 prompt = "cy> ";
 548                 goto read;
 549             }
 550
 551             if (driver.program_ == NULL)
 552                 goto restart;
 553
 554             if (client_ != -1)
 555                 code = command_;
 556             else {
 557                 std::ostringstream str;
 558                 CYOutput out(str, options);
 559                 Setup(out, driver, options);
 560                 out << *driver.program_;
 561                 code = str.str();
 562             }
 563         }
 564
 565         add_history(command_.c_str());
 566         ++histlines;
 567
 568         if (debug) {
 569             Write(syntax, code.c_str(), code.size(), std::cout);
 570             std::cout << std::endl;
 571         }
 572
 573         Run(client_, syntax, code, out_, expand);
 574     }
 575
 576     if (append_history$ != NULL) {
 577         _syscall(close(_syscall(open(histfile, O_CREAT | O_WRONLY, 0600))));
 578         (*append_history$)(histlines, histfile);
 579     } else {
 580         write_history(histfile);
 581     }
 582
 583     *out_ << std::endl;
 584 }
 585
 586 static void *Map(const char *path, size_t *psize) {
 587     int fd;
 588     _syscall(fd = open(path, O_RDONLY));
 589
 590     struct stat stat;
 591     _syscall(fstat(fd, &stat));
 592     size_t size(stat.st_size);
 593
 594     *psize = size;
 595
 596     void *base;
 597     _syscall(base = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0));
 598
 599     _syscall(close(fd));
 600     return base;
 601 }
 602
 603 void InjectLibrary(pid_t pid);
 604
 605 int Main(int argc, char const * const argv[], char const * const envp[]) {
 606     _aprcall(apr_initialize());
 607
 608     apr_pool_t *pool;
 609     apr_pool_create(&pool, NULL);
 610
 611     bool tty(isatty(STDIN_FILENO));
 612     bool compile(false);
 613     CYOptions options;
 614
 615     append_history$ = (int (*)(int, const char *)) (dlsym(RTLD_DEFAULT, "append_history"));
 616
 617 #ifdef CY_ATTACH
 618     pid_t pid(_not(pid_t));
 619 #endif
 620
 621     const char *host(NULL);
 622     const char *port(NULL);
 623
 624     apr_getopt_t *state;
 625     _aprcall(apr_getopt_init(&state, pool, argc, argv));
 626
 627     for (;;) {
 628         char opt;
 629         const char *arg;
 630
 631         apr_status_t status(apr_getopt(state,
 632             "cg:n:"
 633 #ifdef CY_ATTACH
 634             "p:"
 635 #endif
 636             "r:"
 637             "s"
 638         , &opt, &arg));
 639
 640         switch (status) {
 641             case APR_EOF:
 642                 goto getopt;
 643             case APR_BADCH:
 644             case APR_BADARG:
 645                 fprintf(stderr,
 646                     "usage: cycript [-c]"
 647 #ifdef CY_ATTACH
 648                     " [-p <pid|name>]"
 649 #endif
 650                     " [-r <host:port>]"
 651                     " [<script> [<arg>...]]\n"
 652                 );
 653                 return 1;
 654             default:
 655                 _aprcall(status);
 656         }
 657
 658         switch (opt) {
 659             case 'c':
 660                 compile = true;
 661             break;
 662
 663             case 'g':
 664                 if (false);
 665                 else if (strcmp(arg, "rename") == 0)
 666                     options.verbose_ = true;
 667 #if YYDEBUG
 668                 else if (strcmp(arg, "bison") == 0)
 669                     bison_ = true;
 670 #endif
 671                 else {
 672                     fprintf(stderr, "invalid name for -g\n");
 673                     return 1;
 674                 }
 675             break;
 676
 677             case 'n':
 678                 if (false);
 679                 else if (strcmp(arg, "minify") == 0)
 680                     pretty_ = true;
 681                 else {
 682                     fprintf(stderr, "invalid name for -n\n");
 683                     return 1;
 684                 }
 685             break;
 686
 687 #ifdef CY_ATTACH
 688             case 'p': {
 689                 size_t size(strlen(arg));
 690                 char *end;
 691
 692                 pid = strtoul(arg, &end, 0);
 693                 if (arg + size != end) {
 694                     // XXX: arg needs to be escaped in some horrendous way of doom
 695                     const char *command(apr_pstrcat(pool, "ps axc|sed -e '/^ *[0-9]/{s/^ *\\([0-9]*\\)\\( *[^ ]*\\)\\{3\\} *-*\\([^ ]*\\)/\\3 \\1/;/^", arg, " /{s/^[^ ]* //;q;};};d'", NULL));
 696
 697                     if (FILE *pids = popen(command, "r")) {
 698                         char value[32];
 699                         size = 0;
 700
 701                         for (;;) {
 702                             size_t read(fread(value + size, 1, sizeof(value) - size, pids));
 703                             if (read == 0)
 704                                 break;
 705                             else {
 706                                 size += read;
 707                                 if (size == sizeof(value)) {
 708                                     pid = _not(pid_t);
 709                                     goto fail;
 710                                 }
 711                             }
 712                         }
 713
 714                       size:
 715                         if (size == 0)
 716                             goto fail;
 717                         if (value[size - 1] == '\n') {
 718                             --size;
 719                             goto size;
 720                         }
 721
 722                         value[size] = '\0';
 723                         size = strlen(value);
 724                         pid = strtoul(value, &end, 0);
 725                         if (value + size != end) fail:
 726                             pid = _not(pid_t);
 727                         _syscall(pclose(pids));
 728                     }
 729
 730                     if (pid == _not(pid_t)) {
 731                         fprintf(stderr, "invalid pid for -p\n");
 732                         return 1;
 733                     }
 734                 }
 735             } break;
 736 #endif
 737
 738             case 'r': {
 739                 //size_t size(strlen(arg));
 740
 741                 char *colon(strrchr(arg, ':'));
 742                 if (colon == NULL) {
 743                     fprintf(stderr, "missing colon in hostspec\n");
 744                     return 1;
 745                 }
 746
 747                 /*char *end;
 748                 port = strtoul(colon + 1, &end, 10);
 749                 if (end != arg + size) {
 750                     fprintf(stderr, "invalid port in hostspec\n");
 751                     return 1;
 752                 }*/
 753
 754                 host = arg;
 755                 *colon = '\0';
 756                 port = colon + 1;
 757             } break;
 758
 759             case 's':
 760                 strict_ = true;
 761             break;
 762         }
 763     } getopt:;
 764
 765     const char *script;
 766     int ind(state->ind);
 767
 768 #ifdef CY_ATTACH
 769     if (pid != _not(pid_t) && ind < argc - 1) {
 770         fprintf(stderr, "-p cannot set argv\n");
 771         return 1;
 772     }
 773
 774     if (pid != _not(pid_t) && compile) {
 775         fprintf(stderr, "-p conflicts with -c\n");
 776         return 1;
 777     }
 778 #endif
 779
 780     if (ind == argc)
 781         script = NULL;
 782     else {
 783 #ifdef CY_EXECUTE
 784         // XXX: const_cast?! wtf gcc :(
 785         CYSetArgs(argc - ind - 1, const_cast<const char **>(argv + ind + 1));
 786 #endif
 787         script = argv[ind];
 788         if (strcmp(script, "-") == 0)
 789             script = NULL;
 790     }
 791
 792 #ifdef CY_ATTACH
 793     if (pid != _not(pid_t) && script == NULL && !tty) {
 794         fprintf(stderr, "non-terminal attaching to remote console\n");
 795         return 1;
 796     }
 797 #endif
 798
 799 #ifdef CY_ATTACH
 800     if (pid == _not(pid_t))
 801         client_ = -1;
 802     else {
 803         int server(_syscall(socket(PF_UNIX, SOCK_STREAM, 0))); try {
 804             struct sockaddr_un address;
 805             memset(&address, 0, sizeof(address));
 806             address.sun_family = AF_UNIX;
 807
 808             sprintf(address.sun_path, "/tmp/.s.cy.%u", getpid());
 809
 810             _syscall(bind(server, reinterpret_cast<sockaddr *>(&address), SUN_LEN(&address)));
 811             _syscall(chmod(address.sun_path, 0777));
 812
 813             try {
 814                 _syscall(listen(server, 1));
 815                 InjectLibrary(pid);
 816                 client_ = _syscall(accept(server, NULL, NULL));
 817             } catch (...) {
 818                 // XXX: exception?
 819                 unlink(address.sun_path);
 820                 throw;
 821             }
 822         } catch (...) {
 823             _syscall(close(server));
 824             throw;
 825         }
 826     }
 827 #else
 828     client_ = -1;
 829 #endif
 830
 831     if (client_ == -1 && host != NULL && port != NULL) {
 832         struct addrinfo hints;
 833         memset(&hints, 0, sizeof(hints));
 834         hints.ai_family = AF_UNSPEC;
 835         hints.ai_socktype = SOCK_STREAM;
 836         hints.ai_protocol = 0;
 837         hints.ai_flags = 0;
 838
 839         struct addrinfo *infos;
 840         _syscall(getaddrinfo(host, port, &hints, &infos));
 841
 842         _assert(infos != NULL); try {
 843             for (struct addrinfo *info(infos); info != NULL; info = info->ai_next) {
 844                 int client(_syscall(socket(info->ai_family, info->ai_socktype, info->ai_protocol))); try {
 845                     _syscall(connect(client, info->ai_addr, info->ai_addrlen));
 846                     client_ = client;
 847                     break;
 848                 } catch (...) {
 849                     _syscall(close(client));
 850                     throw;
 851                 }
 852             }
 853         } catch (...) {
 854             freeaddrinfo(infos);
 855             throw;
 856         }
 857     }
 858
 859     if (script == NULL && tty)
 860         Console(options);
 861     else {
 862         CYLocalPool pool;
 863
 864         char *start, *end;
 865         std::istream *indirect;
 866
 867         if (script == NULL) {
 868             start = NULL;
 869             end = NULL;
 870             indirect = &std::cin;
 871         } else {
 872             size_t size;
 873             start = reinterpret_cast<char *>(Map(script, &size));
 874             end = start + size;
 875
 876             if (size >= 2 && start[0] == '#' && start[1] == '!') {
 877                 start += 2;
 878
 879                 if (void *line = memchr(start, '\n', end - start))
 880                     start = reinterpret_cast<char *>(line);
 881                 else
 882                     start = end;
 883             }
 884
 885             indirect = NULL;
 886         }
 887
 888         CYStream direct(start, end);
 889         std::istream &stream(indirect == NULL ? direct : *indirect);
 890         CYDriver driver(stream, script ?: "<stdin>");
 891
 892         cy::parser parser(driver);
 893         Setup(driver, parser);
 894
 895         if (parser.parse() != 0 || !driver.errors_.empty()) {
 896             for (CYDriver::Errors::const_iterator i(driver.errors_.begin()); i != driver.errors_.end(); ++i)
 897                 std::cerr << i->location_.begin << ": " << i->message_ << std::endl;
 898         } else if (driver.program_ != NULL)
 899             if (client_ != -1) {
 900                 // XXX: this code means that you can't pipe to another process
 901                 std::string code(start, end-start);
 902                 Run(client_, false, code, &std::cout);
 903             } else {
 904                 std::ostringstream str;
 905                 CYOutput out(str, options);
 906                 Setup(out, driver, options);
 907                 out << *driver.program_;
 908                 std::string code(str.str());
 909                 if (compile)
 910                     std::cout << code;
 911                 else
 912                     Run(client_, false, code, &std::cout);
 913             }
 914     }
 915
 916     apr_pool_destroy(pool);
 917
 918     return 0;
 919 }
 920
 921 int main(int argc, char const * const argv[], char const * const envp[]) {
 922     apr_status_t status(apr_app_initialize(&argc, &argv, &envp));
 923
 924     if (status != APR_SUCCESS) {
 925         fprintf(stderr, "apr_app_initialize() != APR_SUCCESS\n");
 926         return 1;
 927     } else try {
 928         return Main(argc, argv, envp);
 929     } catch (const CYException &error) {
 930         CYPool pool;
 931         fprintf(stderr, "%s\n", error.PoolCString(pool));
 932         return 1;
 933     }
 934 }