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 <complex>
  30 #include <fstream>
  31 #include <sstream>
  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 <errno.h>
  46 #include <getopt.h>
  47 #include <setjmp.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/ioctl.h>
  58 #include <sys/types.h>
  59 #include <sys/socket.h>
  60 #include <netinet/in.h>
  61 #include <sys/un.h>
  62
  63 #include <dlfcn.h>
  64 #include <pwd.h>
  65 #include <term.h>
  66
  67 #ifdef __APPLE__
  68 #include <mach/mach_time.h>
  69 #endif
  70
  71 #include "Driver.hpp"
  72 #include "Error.hpp"
  73 #include "Highlight.hpp"
  74 #include "Syntax.hpp"
  75
  76 extern "C" int rl_display_fixed;
  77 extern "C" int _rl_vis_botlin;
  78 extern "C" int _rl_last_c_pos;
  79 extern "C" int _rl_last_v_pos;
  80
  81 typedef std::complex<int> CYCursor;
  82
  83 static CYCursor current_;
  84 static int width_;
  85 static size_t point_;
  86
  87 unsigned CYDisplayWidth() {
  88     struct winsize info;
  89     if (ioctl(1, TIOCGWINSZ, &info) != -1)
  90         return info.ws_col;
  91     return tgetnum(const_cast<char *>("co"));
  92 }
  93
  94 void CYDisplayOutput_(bool display, const char *&data) {
  95     for (;; ++data) {
  96         char next(*data);
  97         if (next == '\0' || next == CYIgnoreEnd)
  98             return;
  99         if (display)
 100             putchar(next);
 101     }
 102 }
 103
 104 CYCursor CYDisplayOutput(bool display, int width, const char *data, ssize_t offset = 0) {
 105     CYCursor point(current_);
 106
 107     for (;;) {
 108         if (offset-- == 0)
 109             point = current_;
 110         switch (char next = *data++) {
 111             case '\0':
 112                 return point;
 113             break;
 114
 115             case CYIgnoreStart:
 116                 CYDisplayOutput_(display, data);
 117             case CYIgnoreEnd:
 118                 ++offset;
 119             break;
 120
 121             default:
 122                 if (display)
 123                     putchar(next);
 124                 current_ += CYCursor(0, 1);
 125                 if (current_.imag() != width)
 126                     break;
 127                 current_ = CYCursor(current_.real() + 1, 0);
 128                 if (display)
 129                     putp(clr_eos);
 130             break;
 131
 132             case '\n':
 133                 current_ = CYCursor(current_.real() + 1, 4);
 134                 if (display) {
 135                     putp(clr_eol);
 136                     putchar('\n');
 137                     putchar(' ');
 138                     putchar(' ');
 139                     putchar(' ');
 140                     putchar(' ');
 141                 }
 142             break;
 143
 144         }
 145     }
 146 }
 147
 148 void CYDisplayMove_(char *negative, char *positive, int offset) {
 149     if (offset < 0)
 150         putp(tparm(negative, -offset));
 151     else if (offset > 0)
 152         putp(tparm(positive, offset));
 153 }
 154
 155 void CYDisplayMove(CYCursor target) {
 156     CYCursor offset(target - current_);
 157
 158     CYDisplayMove_(parm_up_cursor, parm_down_cursor, offset.real());
 159
 160     if (char *parm = tparm(column_address, target.imag()))
 161         putp(parm);
 162     else
 163         CYDisplayMove_(parm_left_cursor, parm_right_cursor, offset.imag());
 164
 165     current_ = target;
 166 }
 167
 168 void CYDisplayUpdate() {
 169     current_ = CYCursor(_rl_last_v_pos, _rl_last_c_pos);
 170
 171     const char *prompt(rl_display_prompt);
 172
 173     std::ostringstream stream;
 174     CYLexerHighlight(rl_line_buffer, rl_end, stream, true);
 175     std::string string(stream.str());
 176     const char *buffer(string.c_str());
 177
 178     int width(CYDisplayWidth());
 179     if (width_ != width) {
 180         current_ = CYCursor();
 181         CYDisplayOutput(false, width, prompt);
 182         current_ = CYDisplayOutput(false, width, buffer, point_);
 183     }
 184
 185     CYDisplayMove(CYCursor());
 186     CYDisplayOutput(true, width, prompt);
 187     CYCursor target(CYDisplayOutput(true, width, stream.str().c_str(), rl_point));
 188
 189     _rl_vis_botlin = current_.real();
 190
 191     if (current_.imag() == 0)
 192         CYDisplayOutput(true, width, " ");
 193     putp(clr_eos);
 194
 195     CYDisplayMove(target);
 196     fflush(stdout);
 197
 198     _rl_last_v_pos = current_.real();
 199     _rl_last_c_pos = current_.imag();
 200
 201     width_ = width;
 202     point_ = rl_point;
 203 }
 204
 205 static volatile enum {
 206     Working,
 207     Parsing,
 208     Running,
 209     Sending,
 210     Waiting,
 211 } mode_;
 212
 213 static jmp_buf ctrlc_;
 214
 215 static void sigint(int) {
 216     switch (mode_) {
 217         case Working:
 218             return;
 219         case Parsing:
 220             longjmp(ctrlc_, 1);
 221         case Running:
 222             CYCancel();
 223             return;
 224         case Sending:
 225             return;
 226         case Waiting:
 227             return;
 228     }
 229 }
 230
 231 static bool bison_;
 232 static bool timing_;
 233 static bool strict_;
 234 static bool pretty_;
 235
 236 void Setup(CYDriver &driver) {
 237     if (bison_)
 238         driver.debug_ = 1;
 239     if (strict_)
 240         driver.strict_ = true;
 241 }
 242
 243 void Setup(CYOutput &out, CYDriver &driver, CYOptions &options, bool lower) {
 244     out.pretty_ = pretty_;
 245     if (lower)
 246         driver.Replace(options);
 247 }
 248
 249 static CYUTF8String Run(CYPool &pool, int client, CYUTF8String code) {
 250     const char *json;
 251     uint32_t size;
 252
 253     if (client == -1) {
 254         mode_ = Running;
 255 #ifdef CY_EXECUTE
 256         json = CYExecute(CYGetJSContext(), pool, code);
 257 #else
 258         json = NULL;
 259 #endif
 260         mode_ = Working;
 261         if (json == NULL)
 262             size = 0;
 263         else
 264             size = strlen(json);
 265     } else {
 266         mode_ = Sending;
 267         size = code.size;
 268         _assert(CYSendAll(client, &size, sizeof(size)));
 269         _assert(CYSendAll(client, code.data, code.size));
 270         mode_ = Waiting;
 271         _assert(CYRecvAll(client, &size, sizeof(size)));
 272         if (size == _not(uint32_t))
 273             json = NULL;
 274         else {
 275             char *temp(new(pool) char[size + 1]);
 276             _assert(CYRecvAll(client, temp, size));
 277             temp[size] = '\0';
 278             json = temp;
 279         }
 280         mode_ = Working;
 281     }
 282
 283     return CYUTF8String(json, size);
 284 }
 285
 286 static CYUTF8String Run(CYPool &pool, int client, const std::string &code) {
 287     return Run(pool, client, CYUTF8String(code.c_str(), code.size()));
 288 }
 289
 290 static std::ostream *out_;
 291
 292 static void Output(CYUTF8String json, std::ostream *out, bool expand = false) {
 293     const char *data(json.data);
 294     size_t size(json.size);
 295
 296     if (data == NULL || out == NULL)
 297         return;
 298
 299     if (!expand ||
 300         data[0] != '@' && data[0] != '"' && data[0] != '\'' ||
 301         data[0] == '@' && data[1] != '"' && data[1] != '\''
 302     )
 303         CYLexerHighlight(data, size, *out);
 304     else for (size_t i(0); i != size; ++i)
 305         if (data[i] != '\\')
 306             *out << data[i];
 307         else switch(data[++i]) {
 308             case '\0': goto done;
 309             case '\\': *out << '\\'; break;
 310             case '\'': *out << '\''; break;
 311             case '"': *out << '"'; break;
 312             case 'b': *out << '\b'; break;
 313             case 'f': *out << '\f'; break;
 314             case 'n': *out << '\n'; break;
 315             case 'r': *out << '\r'; break;
 316             case 't': *out << '\t'; break;
 317             case 'v': *out << '\v'; break;
 318             default: *out << '\\'; --i; break;
 319         }
 320
 321   done:
 322     *out << std::endl;
 323 }
 324
 325 int (*append_history$)(int, const char *);
 326
 327 static std::string command_;
 328
 329 static int client_;
 330
 331 static CYUTF8String Run(CYPool &pool, const std::string &code) {
 332     return Run(pool, client_, code);
 333 }
 334
 335 static char **Complete(const char *word, int start, int end) {
 336     rl_attempted_completion_over = ~0;
 337     std::string line(rl_line_buffer, start);
 338     char **values(CYComplete(word, command_ + line, &Run));
 339     mode_ = Parsing;
 340     return values;
 341 }
 342
 343 // need char *, not const char *
 344 static char name_[] = "cycript";
 345 static char break_[] = " \t\n\"\\'`@><=;|&{(" ")}" ".:[]";
 346
 347 class History {
 348   private:
 349     std::string histfile_;
 350     size_t histlines_;
 351
 352   public:
 353     History(std::string histfile) :
 354         histfile_(histfile),
 355         histlines_(0)
 356     {
 357         read_history(histfile_.c_str());
 358
 359         for (HIST_ENTRY *history((history_set_pos(0), current_history())); history; history = next_history())
 360             for (char *character(history->line); *character; ++character)
 361                 if (*character == '\x01') *character = '\n';
 362     }
 363
 364     ~History() {
 365         for (HIST_ENTRY *history((history_set_pos(0), current_history())); history; history = next_history())
 366             for (char *character(history->line); *character; ++character)
 367                 if (*character == '\n') *character = '\x01';
 368
 369         if (append_history$ != NULL) {
 370             int fd(_syscall(open(histfile_.c_str(), O_CREAT | O_WRONLY, 0600)));
 371             _syscall(close(fd));
 372             _assert((*append_history$)(histlines_, histfile_.c_str()) == 0);
 373         } else {
 374             _assert(write_history(histfile_.c_str()) == 0);
 375         }
 376     }
 377
 378     void operator +=(std::string command) {
 379         add_history(command.c_str());
 380         ++histlines_;
 381     }
 382 };
 383
 384 static int CYConsoleKeyReturn(int count, int key) {
 385     rl_insert(count, '\n');
 386
 387     bool done(false);
 388     if (rl_end != 0 && rl_point == rl_end && rl_line_buffer[0] == '?')
 389         done = true;
 390     else if (rl_point == rl_end) {
 391         std::string command(rl_line_buffer, rl_end);
 392         std::istringstream stream(command);
 393
 394         size_t last(std::string::npos);
 395         for (size_t i(0); i != std::string::npos; i = command.find('\n', i + 1))
 396             ++last;
 397
 398         CYPool pool;
 399         CYDriver driver(pool, stream);
 400         if (driver.Parse() || !driver.errors_.empty())
 401             for (CYDriver::Errors::const_iterator error(driver.errors_.begin()); error != driver.errors_.end(); ++error) {
 402                 if (error->location_.begin.line != last + 1)
 403                     done = true;
 404                 break;
 405             }
 406         else
 407             done = true;
 408     }
 409
 410     if (done)
 411         return rl_newline(count, key);
 412     return 0;
 413 }
 414
 415 template <typename Type_>
 416 static Type_ *CYmemrchr(Type_ *data, Type_ value, size_t size) {
 417     while (size != 0)
 418         if (data[--size] == value)
 419             return data + size;
 420     return NULL;
 421 }
 422
 423 static int CYConsoleKeyUp(int count, int key) {
 424     char *after(CYmemrchr(rl_line_buffer, '\n', rl_point));
 425     if (after == NULL) {
 426         if (int value = rl_get_previous_history(count, key))
 427             return value;
 428         return 0;
 429     }
 430
 431     char *before(CYmemrchr(rl_line_buffer, '\n', after - rl_line_buffer));
 432     if (before == NULL)
 433         before = rl_line_buffer - 1;
 434
 435     ptrdiff_t offset(rl_line_buffer + rl_point - after);
 436     if (offset > after - before)
 437         rl_point = after - 1 - rl_line_buffer;
 438     else
 439         rl_point = before + offset - rl_line_buffer;
 440
 441     return 0;
 442 }
 443
 444 static int CYConsoleKeyDown(int count, int key) {
 445     char *after(static_cast<char *>(memchr(rl_line_buffer + rl_point, '\n', rl_end - rl_point)));
 446     if (after == NULL) {
 447         if (int value = rl_get_next_history(count, key))
 448             return value;
 449         rl_point = 0;
 450         return 0;
 451     }
 452
 453     char *before(CYmemrchr(rl_line_buffer, '\n', rl_point));
 454     if (before == NULL)
 455         before = rl_line_buffer - 1;
 456
 457     ptrdiff_t offset(rl_line_buffer + rl_point - before);
 458     if (offset > rl_line_buffer + rl_end - after)
 459         rl_point = rl_end;
 460     else
 461         rl_point = after + offset - rl_line_buffer;
 462
 463     return 0;
 464 }
 465
 466 static void Console(CYOptions &options) {
 467     std::string basedir;
 468     if (const char *home = getenv("HOME"))
 469         basedir = home;
 470     else {
 471         passwd *passwd;
 472         if (const char *username = getenv("LOGNAME"))
 473             passwd = getpwnam(username);
 474         else
 475             passwd = getpwuid(getuid());
 476         basedir = passwd->pw_dir;
 477     }
 478
 479     basedir += "/.cycript";
 480     mkdir(basedir.c_str(), 0700);
 481
 482     rl_initialize();
 483     rl_readline_name = name_;
 484
 485     History history(basedir + "/history");
 486
 487     bool bypass(false);
 488     bool debug(false);
 489     bool expand(false);
 490     bool lower(true);
 491
 492     out_ = &std::cout;
 493
 494     rl_completer_word_break_characters = break_;
 495     rl_attempted_completion_function = &Complete;
 496     rl_bind_key('\t', rl_complete);
 497
 498     rl_redisplay_function = CYDisplayUpdate;
 499
 500 #if defined (__MSDOS__)
 501     rl_bind_keyseq("\033[0A", &CYConsoleKeyUp);
 502     rl_bind_keyseq("\033[0D", &CYConsoleKeyDown);
 503 #endif
 504     rl_bind_keyseq("\033[A", &CYConsoleKeyUp);
 505     rl_bind_keyseq("\033[B", &CYConsoleKeyDown);
 506     rl_bind_keyseq("\033OA", &CYConsoleKeyUp);
 507     rl_bind_keyseq("\033OB", &CYConsoleKeyDown);
 508 #if defined (__MINGW32__)
 509     rl_bind_keyseq("\340H", &CYConsoleKeyUp);
 510     rl_bind_keyseq("\340P", &CYConsoleKeyDown);
 511     rl_bind_keyseq("\\000H", &CYConsoleKeyUp);
 512     rl_bind_keyseq("\\000P", &CYConsoleKeyDown);
 513 #endif
 514
 515     struct sigaction action;
 516     sigemptyset(&action.sa_mask);
 517     action.sa_handler = &sigint;
 518     action.sa_flags = 0;
 519     sigaction(SIGINT, &action, NULL);
 520
 521     for (;;) {
 522         if (setjmp(ctrlc_) != 0) {
 523             mode_ = Working;
 524             *out_ << std::endl;
 525             continue;
 526         }
 527
 528         if (bypass)
 529             rl_bind_key('\r', &rl_newline);
 530         else
 531             rl_bind_key('\r', &CYConsoleKeyReturn);
 532
 533         mode_ = Parsing;
 534         char *line(readline("cy# "));
 535         mode_ = Working;
 536
 537         if (line == NULL) {
 538             *out_ << std::endl;
 539             break;
 540         }
 541
 542         std::string command(line);
 543         free(line);
 544         _assert(!command.empty());
 545         _assert(command[command.size() - 1] == '\n');
 546         command.resize(command.size() - 1);
 547         if (command.empty())
 548             continue;
 549
 550         if (command[0] == '?') {
 551             std::string data(command.substr(1));
 552             if (data == "bypass") {
 553                 bypass = !bypass;
 554                 *out_ << "bypass == " << (bypass ? "true" : "false") << std::endl;
 555             } else if (data == "debug") {
 556                 debug = !debug;
 557                 *out_ << "debug == " << (debug ? "true" : "false") << std::endl;
 558             } else if (data == "destroy") {
 559                 CYDestroyContext();
 560             } else if (data == "gc") {
 561                 *out_ << "collecting... " << std::flush;
 562                 CYGarbageCollect(CYGetJSContext());
 563                 *out_ << "done." << std::endl;
 564             } else if (data == "exit") {
 565                 return;
 566             } else if (data == "expand") {
 567                 expand = !expand;
 568                 *out_ << "expand == " << (expand ? "true" : "false") << std::endl;
 569             } else if (data == "lower") {
 570                 lower = !lower;
 571                 *out_ << "lower == " << (lower ? "true" : "false") << std::endl;
 572             }
 573
 574             history += command;
 575             continue;
 576         }
 577
 578         std::string code;
 579         if (bypass)
 580             code = command;
 581         else {
 582             std::istringstream stream(command);
 583
 584             CYPool pool;
 585             CYDriver driver(pool, stream);
 586             Setup(driver);
 587
 588             if (driver.Parse() || !driver.errors_.empty()) {
 589                 for (CYDriver::Errors::const_iterator error(driver.errors_.begin()); error != driver.errors_.end(); ++error) {
 590                     CYPosition begin(error->location_.begin);
 591                     CYPosition end(error->location_.end);
 592
 593                     /*if (begin.line != lines2.size()) {
 594                         std::cerr << "  | ";
 595                         std::cerr << lines2[begin.line - 1] << std::endl;
 596                     }*/
 597
 598                     std::cerr << "....";
 599                     for (size_t i(0); i != begin.column; ++i)
 600                         std::cerr << '.';
 601                     if (begin.line != end.line || begin.column == end.column)
 602                         std::cerr << '^';
 603                     else for (size_t i(0), e(end.column - begin.column); i != e; ++i)
 604                         std::cerr << '^';
 605                     std::cerr << std::endl;
 606
 607                     std::cerr << "  | ";
 608                     std::cerr << error->message_ << std::endl;
 609
 610                     history += command;
 611                     break;
 612                 }
 613
 614                 continue;
 615             }
 616
 617             if (driver.script_ == NULL)
 618                 continue;
 619
 620             std::stringbuf str;
 621             CYOutput out(str, options);
 622             Setup(out, driver, options, lower);
 623             out << *driver.script_;
 624             code = str.str();
 625         }
 626
 627         history += command;
 628
 629         if (debug) {
 630             std::cout << "cy= ";
 631             CYLexerHighlight(code.c_str(), code.size(), std::cout);
 632             std::cout << std::endl;
 633         }
 634
 635         CYPool pool;
 636         Output(Run(pool, client_, code), &std::cout, expand);
 637     }
 638 }
 639
 640 void InjectLibrary(pid_t, int, const char *const []);
 641
 642 static uint64_t CYGetTime() {
 643 #ifdef __APPLE__
 644     return mach_absolute_time();
 645 #else
 646     struct timespec spec;
 647     clock_gettime(CLOCK_MONOTONIC, &spec);
 648     return spec.tv_sec * UINT64_C(1000000000) + spec.tv_nsec;
 649 #endif
 650 }
 651
 652 int Main(int argc, char * const argv[], char const * const envp[]) {
 653     bool tty(isatty(STDIN_FILENO));
 654     bool compile(false);
 655     bool target(false);
 656     CYOptions options;
 657
 658     append_history$ = (int (*)(int, const char *)) (dlsym(RTLD_DEFAULT, "append_history"));
 659
 660 #ifdef CY_ATTACH
 661     pid_t pid(_not(pid_t));
 662 #endif
 663
 664     const char *host(NULL);
 665     const char *port(NULL);
 666
 667     optind = 1;
 668
 669     for (;;) {
 670         int option(getopt_long(argc, argv,
 671             "c"
 672             "g:"
 673             "n:"
 674 #ifdef CY_ATTACH
 675             "p:"
 676 #endif
 677             "r:"
 678             "s"
 679         , (const struct option[]) {
 680             {NULL, no_argument, NULL, 'c'},
 681             {NULL, required_argument, NULL, 'g'},
 682             {NULL, required_argument, NULL, 'n'},
 683 #ifdef CY_ATTACH
 684             {NULL, required_argument, NULL, 'p'},
 685 #endif
 686             {NULL, required_argument, NULL, 'r'},
 687             {NULL, no_argument, NULL, 's'},
 688         {0, 0, 0, 0}}, NULL));
 689
 690         switch (option) {
 691             case -1:
 692                 goto getopt;
 693
 694             case ':':
 695             case '?':
 696                 fprintf(stderr,
 697                     "usage: cycript [-c]"
 698 #ifdef CY_ATTACH
 699                     " [-p <pid|name>]"
 700 #endif
 701                     " [-r <host:port>]"
 702                     " [<script> [<arg>...]]\n"
 703                 );
 704                 return 1;
 705
 706             target:
 707                 if (!target)
 708                     target = true;
 709                 else {
 710                     fprintf(stderr, "only one of -[c"
 711 #ifdef CY_ATTACH
 712                     "p"
 713 #endif
 714                     "r] may be used at a time\n");
 715                     return 1;
 716                 }
 717             break;
 718
 719             case 'c':
 720                 compile = true;
 721             goto target;
 722
 723             case 'g':
 724                 if (false);
 725                 else if (strcmp(optarg, "rename") == 0)
 726                     options.verbose_ = true;
 727                 else if (strcmp(optarg, "bison") == 0)
 728                     bison_ = true;
 729                 else if (strcmp(optarg, "timing") == 0)
 730                     timing_ = true;
 731                 else {
 732                     fprintf(stderr, "invalid name for -g\n");
 733                     return 1;
 734                 }
 735             break;
 736
 737             case 'n':
 738                 if (false);
 739                 else if (strcmp(optarg, "minify") == 0)
 740                     pretty_ = true;
 741                 else {
 742                     fprintf(stderr, "invalid name for -n\n");
 743                     return 1;
 744                 }
 745             break;
 746
 747 #ifdef CY_ATTACH
 748             case 'p': {
 749                 size_t size(strlen(optarg));
 750                 char *end;
 751
 752                 pid = strtoul(optarg, &end, 0);
 753                 if (optarg + size != end) {
 754                     // XXX: arg needs to be escaped in some horrendous way of doom
 755                     // XXX: this is a memory leak now because I just don't care enough
 756                     char *command;
 757                     int writ(asprintf(&command, "ps axc|sed -e '/^ *[0-9]/{s/^ *\\([0-9]*\\)\\( *[^ ]*\\)\\{3\\} *-*\\([^ ]*\\)/\\3 \\1/;/^%s /{s/^[^ ]* //;q;};};d'", optarg));
 758                     _assert(writ != -1);
 759
 760                     if (FILE *pids = popen(command, "r")) {
 761                         char value[32];
 762                         size = 0;
 763
 764                         for (;;) {
 765                             size_t read(fread(value + size, 1, sizeof(value) - size, pids));
 766                             if (read == 0)
 767                                 break;
 768                             else {
 769                                 size += read;
 770                                 if (size == sizeof(value))
 771                                     goto fail;
 772                             }
 773                         }
 774
 775                       size:
 776                         if (size == 0)
 777                             goto fail;
 778                         if (value[size - 1] == '\n') {
 779                             --size;
 780                             goto size;
 781                         }
 782
 783                         value[size] = '\0';
 784                         size = strlen(value);
 785                         pid = strtoul(value, &end, 0);
 786                         if (value + size != end) fail:
 787                             pid = _not(pid_t);
 788                         _syscall(pclose(pids));
 789                     }
 790
 791                     if (pid == _not(pid_t)) {
 792                         fprintf(stderr, "unable to find process `%s' using ps\n", optarg);
 793                         return 1;
 794                     }
 795                 }
 796             } goto target;
 797 #endif
 798
 799             case 'r': {
 800                 //size_t size(strlen(optarg));
 801
 802                 char *colon(strrchr(optarg, ':'));
 803                 if (colon == NULL) {
 804                     fprintf(stderr, "missing colon in hostspec\n");
 805                     return 1;
 806                 }
 807
 808                 /*char *end;
 809                 port = strtoul(colon + 1, &end, 10);
 810                 if (end != optarg + size) {
 811                     fprintf(stderr, "invalid port in hostspec\n");
 812                     return 1;
 813                 }*/
 814
 815                 host = optarg;
 816                 *colon = '\0';
 817                 port = colon + 1;
 818             } goto target;
 819
 820             case 's':
 821                 strict_ = true;
 822             break;
 823
 824             default:
 825                 _assert(false);
 826         }
 827     }
 828
 829   getopt:
 830     argc -= optind;
 831     argv += optind;
 832
 833     const char *script;
 834
 835 #ifdef CY_ATTACH
 836     if (pid != _not(pid_t) && argc > 1) {
 837         fprintf(stderr, "-p cannot set argv\n");
 838         return 1;
 839     }
 840 #endif
 841
 842     if (argc == 0)
 843         script = NULL;
 844     else {
 845 #ifdef CY_EXECUTE
 846         // XXX: const_cast?! wtf gcc :(
 847         CYSetArgs(argc - 1, const_cast<const char **>(argv + 1));
 848 #endif
 849         script = argv[0];
 850         if (strcmp(script, "-") == 0)
 851             script = NULL;
 852     }
 853
 854 #ifdef CY_ATTACH
 855     if (pid == _not(pid_t))
 856         client_ = -1;
 857     else {
 858         struct Socket {
 859             int fd_;
 860
 861             Socket(int fd) :
 862                 fd_(fd)
 863             {
 864             }
 865
 866             ~Socket() {
 867                 close(fd_);
 868             }
 869
 870             operator int() {
 871                 return fd_;
 872             }
 873         } server(_syscall(socket(PF_UNIX, SOCK_STREAM, 0)));
 874
 875         struct sockaddr_un address;
 876         memset(&address, 0, sizeof(address));
 877         address.sun_family = AF_UNIX;
 878
 879         const char *tmp;
 880 #if defined(__APPLE__) && (defined(__arm__) || defined(__arm64__))
 881         tmp = "/Library/Caches";
 882 #else
 883         tmp = "/tmp";
 884 #endif
 885
 886         sprintf(address.sun_path, "%s/.s.cy.%u", tmp, getpid());
 887         unlink(address.sun_path);
 888
 889         struct File {
 890             const char *path_;
 891
 892             File(const char *path) :
 893                 path_(path)
 894             {
 895             }
 896
 897             ~File() {
 898                 unlink(path_);
 899             }
 900         } file(address.sun_path);
 901
 902         _syscall(bind(server, reinterpret_cast<sockaddr *>(&address), SUN_LEN(&address)));
 903         _syscall(chmod(address.sun_path, 0777));
 904
 905         _syscall(listen(server, 1));
 906         const char *const argv[] = {address.sun_path, NULL};
 907         InjectLibrary(pid, 1, argv);
 908         client_ = _syscall(accept(server, NULL, NULL));
 909     }
 910 #else
 911     client_ = -1;
 912 #endif
 913
 914     if (client_ == -1 && host != NULL && port != NULL) {
 915         struct addrinfo hints;
 916         memset(&hints, 0, sizeof(hints));
 917         hints.ai_family = AF_UNSPEC;
 918         hints.ai_socktype = SOCK_STREAM;
 919         hints.ai_protocol = 0;
 920         hints.ai_flags = 0;
 921
 922         struct addrinfo *infos;
 923         _syscall(getaddrinfo(host, port, &hints, &infos));
 924
 925         _assert(infos != NULL); try {
 926             for (struct addrinfo *info(infos); info != NULL; info = info->ai_next) {
 927                 int client(_syscall(socket(info->ai_family, info->ai_socktype, info->ai_protocol))); try {
 928                     _syscall(connect(client, info->ai_addr, info->ai_addrlen));
 929                     client_ = client;
 930                     break;
 931                 } catch (...) {
 932                     _syscall(close(client));
 933                     throw;
 934                 }
 935             }
 936         } catch (...) {
 937             freeaddrinfo(infos);
 938             throw;
 939         }
 940     }
 941
 942     if (script == NULL && tty)
 943         Console(options);
 944     else {
 945         std::istream *stream;
 946         if (script == NULL) {
 947             stream = &std::cin;
 948             script = "<stdin>";
 949         } else {
 950             stream = new std::fstream(script, std::ios::in | std::ios::binary);
 951             _assert(!stream->fail());
 952         }
 953
 954         if (timing_) {
 955             std::stringbuf buffer;
 956             stream->get(buffer, '\0');
 957             _assert(!stream->fail());
 958
 959             double average(0);
 960             int samples(-50);
 961             uint64_t start(CYGetTime());
 962
 963             for (;;) {
 964                 stream = new std::istringstream(buffer.str());
 965
 966                 CYPool pool;
 967                 CYDriver driver(pool, *stream, script);
 968                 Setup(driver);
 969
 970                 uint64_t begin(CYGetTime());
 971                 driver.Parse();
 972                 uint64_t end(CYGetTime());
 973
 974                 delete stream;
 975
 976                 average += (end - begin - average) / ++samples;
 977
 978                 uint64_t now(CYGetTime());
 979                 if (samples == 0)
 980                     average = 0;
 981                 else if ((now - start) / 1000000000 >= 1)
 982                     std::cout << std::fixed << average << '\t' << (end - begin) << '\t' << samples << std::endl;
 983                 else continue;
 984
 985                 start = now;
 986             }
 987
 988             stream = new std::istringstream(buffer.str());
 989             std::cin.get();
 990         }
 991
 992         CYPool pool;
 993         CYDriver driver(pool, *stream, script);
 994         Setup(driver);
 995
 996         bool failed(driver.Parse());
 997
 998         if (failed || !driver.errors_.empty()) {
 999             for (CYDriver::Errors::const_iterator i(driver.errors_.begin()); i != driver.errors_.end(); ++i)
1000                 std::cerr << i->location_.begin << ": " << i->message_ << std::endl;
1001         } else if (driver.script_ != NULL) {
1002             std::stringbuf str;
1003             CYOutput out(str, options);
1004             Setup(out, driver, options, true);
1005             out << *driver.script_;
1006             std::string code(str.str());
1007             if (compile)
1008                 std::cout << code;
1009             else {
1010                 CYUTF8String json(Run(pool, client_, code));
1011                 if (CYStartsWith(json, "throw ")) {
1012                     CYLexerHighlight(json.data, json.size, std::cerr);
1013                     std::cerr << std::endl;
1014                     return 1;
1015                 }
1016             }
1017         }
1018     }
1019
1020     return 0;
1021 }
1022
1023 int main(int argc, char * const argv[], char const * const envp[]) {
1024     try {
1025         return Main(argc, argv, envp);
1026     } catch (const CYException &error) {
1027         CYPool pool;
1028         fprintf(stderr, "%s\n", error.PoolCString(pool));
1029         return 1;
1030     }
1031 }