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     if (rl_end != 0 && rl_point == rl_end && rl_line_buffer[0] == '?')
 388         rl_done = 1;
 389     else if (rl_point == rl_end) {
 390         std::string command(rl_line_buffer, rl_end);
 391         std::istringstream stream(command);
 392
 393         size_t last(std::string::npos);
 394         for (size_t i(0); i != std::string::npos; i = command.find('\n', i + 1))
 395             ++last;
 396
 397         CYPool pool;
 398         CYDriver driver(pool, stream);
 399         if (driver.Parse() || !driver.errors_.empty())
 400             for (CYDriver::Errors::const_iterator error(driver.errors_.begin()); error != driver.errors_.end(); ++error) {
 401                 if (error->location_.begin.line != last + 1)
 402                     rl_done = 1;
 403                 break;
 404             }
 405         else
 406             rl_done = 1;
 407     }
 408
 409     if (rl_done)
 410         std::cout << std::endl;
 411     return 0;
 412 }
 413
 414 template <typename Type_>
 415 static Type_ *CYmemrchr(Type_ *data, Type_ value, size_t size) {
 416     while (size != 0)
 417         if (data[--size] == value)
 418             return data + size;
 419     return NULL;
 420 }
 421
 422 static int CYConsoleKeyUp(int count, int key) {
 423     char *after(CYmemrchr(rl_line_buffer, '\n', rl_point));
 424     if (after == NULL) {
 425         if (int value = rl_get_previous_history(count, key))
 426             return value;
 427         return 0;
 428     }
 429
 430     char *before(CYmemrchr(rl_line_buffer, '\n', after - rl_line_buffer));
 431     if (before == NULL)
 432         before = rl_line_buffer - 1;
 433
 434     ptrdiff_t offset(rl_line_buffer + rl_point - after);
 435     if (offset > after - before)
 436         rl_point = after - 1 - rl_line_buffer;
 437     else
 438         rl_point = before + offset - rl_line_buffer;
 439
 440     return 0;
 441 }
 442
 443 static int CYConsoleKeyDown(int count, int key) {
 444     char *after(static_cast<char *>(memchr(rl_line_buffer + rl_point, '\n', rl_end - rl_point)));
 445     if (after == NULL) {
 446         if (int value = rl_get_next_history(count, key))
 447             return value;
 448         rl_point = 0;
 449         return 0;
 450     }
 451
 452     char *before(CYmemrchr(rl_line_buffer, '\n', rl_point));
 453     if (before == NULL)
 454         before = rl_line_buffer - 1;
 455
 456     ptrdiff_t offset(rl_line_buffer + rl_point - before);
 457     if (offset > rl_line_buffer + rl_end - after)
 458         rl_point = rl_end;
 459     else
 460         rl_point = after + offset - rl_line_buffer;
 461
 462     return 0;
 463 }
 464
 465 static void Console(CYOptions &options) {
 466     std::string basedir;
 467     if (const char *home = getenv("HOME"))
 468         basedir = home;
 469     else {
 470         passwd *passwd;
 471         if (const char *username = getenv("LOGNAME"))
 472             passwd = getpwnam(username);
 473         else
 474             passwd = getpwuid(getuid());
 475         basedir = passwd->pw_dir;
 476     }
 477
 478     basedir += "/.cycript";
 479     mkdir(basedir.c_str(), 0700);
 480
 481     rl_initialize();
 482     rl_readline_name = name_;
 483
 484     History history(basedir + "/history");
 485
 486     bool bypass(false);
 487     bool debug(false);
 488     bool expand(false);
 489     bool lower(true);
 490
 491     out_ = &std::cout;
 492
 493     rl_completer_word_break_characters = break_;
 494     rl_attempted_completion_function = &Complete;
 495     rl_bind_key('\t', rl_complete);
 496
 497     rl_redisplay_function = CYDisplayUpdate;
 498
 499 #if defined (__MSDOS__)
 500     rl_bind_keyseq("\033[0A", &CYConsoleKeyUp);
 501     rl_bind_keyseq("\033[0D", &CYConsoleKeyDown);
 502 #endif
 503     rl_bind_keyseq("\033[A", &CYConsoleKeyUp);
 504     rl_bind_keyseq("\033[B", &CYConsoleKeyDown);
 505     rl_bind_keyseq("\033OA", &CYConsoleKeyUp);
 506     rl_bind_keyseq("\033OB", &CYConsoleKeyDown);
 507 #if defined (__MINGW32__)
 508     rl_bind_keyseq("\340H", &CYConsoleKeyUp);
 509     rl_bind_keyseq("\340P", &CYConsoleKeyDown);
 510     rl_bind_keyseq("\\000H", &CYConsoleKeyUp);
 511     rl_bind_keyseq("\\000P", &CYConsoleKeyDown);
 512 #endif
 513
 514     struct sigaction action;
 515     sigemptyset(&action.sa_mask);
 516     action.sa_handler = &sigint;
 517     action.sa_flags = 0;
 518     sigaction(SIGINT, &action, NULL);
 519
 520     for (;;) {
 521         if (setjmp(ctrlc_) != 0) {
 522             mode_ = Working;
 523             *out_ << std::endl;
 524             continue;
 525         }
 526
 527         if (bypass)
 528             rl_bind_key('\r', &rl_newline);
 529         else
 530             rl_bind_key('\r', &CYConsoleKeyReturn);
 531
 532         mode_ = Parsing;
 533         char *line(readline("cy# "));
 534         mode_ = Working;
 535
 536         if (line == NULL) {
 537             *out_ << std::endl;
 538             break;
 539         }
 540
 541         std::string command(line);
 542         free(line);
 543         _assert(!command.empty());
 544         _assert(command[command.size() - 1] == '\n');
 545         command.resize(command.size() - 1);
 546         if (command.empty())
 547             continue;
 548
 549         if (command[0] == '?') {
 550             std::string data(command.substr(1));
 551             if (data == "bypass") {
 552                 bypass = !bypass;
 553                 *out_ << "bypass == " << (bypass ? "true" : "false") << std::endl;
 554             } else if (data == "debug") {
 555                 debug = !debug;
 556                 *out_ << "debug == " << (debug ? "true" : "false") << std::endl;
 557             } else if (data == "destroy") {
 558                 CYDestroyContext();
 559             } else if (data == "gc") {
 560                 *out_ << "collecting... " << std::flush;
 561                 CYGarbageCollect(CYGetJSContext());
 562                 *out_ << "done." << std::endl;
 563             } else if (data == "exit") {
 564                 return;
 565             } else if (data == "expand") {
 566                 expand = !expand;
 567                 *out_ << "expand == " << (expand ? "true" : "false") << std::endl;
 568             } else if (data == "lower") {
 569                 lower = !lower;
 570                 *out_ << "lower == " << (lower ? "true" : "false") << std::endl;
 571             }
 572
 573             history += command;
 574             continue;
 575         }
 576
 577         std::string code;
 578         if (bypass)
 579             code = command;
 580         else {
 581             std::istringstream stream(command);
 582
 583             CYPool pool;
 584             CYDriver driver(pool, stream);
 585             Setup(driver);
 586
 587             if (driver.Parse() || !driver.errors_.empty()) {
 588                 for (CYDriver::Errors::const_iterator error(driver.errors_.begin()); error != driver.errors_.end(); ++error) {
 589                     CYPosition begin(error->location_.begin);
 590                     CYPosition end(error->location_.end);
 591
 592                     /*if (begin.line != lines2.size()) {
 593                         std::cerr << "  | ";
 594                         std::cerr << lines2[begin.line - 1] << std::endl;
 595                     }*/
 596
 597                     std::cerr << "....";
 598                     for (size_t i(0); i != begin.column; ++i)
 599                         std::cerr << '.';
 600                     if (begin.line != end.line || begin.column == end.column)
 601                         std::cerr << '^';
 602                     else for (size_t i(0), e(end.column - begin.column); i != e; ++i)
 603                         std::cerr << '^';
 604                     std::cerr << std::endl;
 605
 606                     std::cerr << "  | ";
 607                     std::cerr << error->message_ << std::endl;
 608
 609                     history += command;
 610                     break;
 611                 }
 612
 613                 continue;
 614             }
 615
 616             if (driver.script_ == NULL)
 617                 continue;
 618
 619             std::stringbuf str;
 620             CYOutput out(str, options);
 621             Setup(out, driver, options, lower);
 622             out << *driver.script_;
 623             code = str.str();
 624         }
 625
 626         history += command;
 627
 628         if (debug) {
 629             std::cout << "cy= ";
 630             CYLexerHighlight(code.c_str(), code.size(), std::cout);
 631             std::cout << std::endl;
 632         }
 633
 634         CYPool pool;
 635         Output(Run(pool, client_, code), &std::cout, expand);
 636     }
 637 }
 638
 639 void InjectLibrary(pid_t, int, const char *const []);
 640
 641 static uint64_t CYGetTime() {
 642 #ifdef __APPLE__
 643     return mach_absolute_time();
 644 #else
 645     struct timespec spec;
 646     clock_gettime(CLOCK_MONOTONIC, &spec);
 647     return spec.tv_sec * UINT64_C(1000000000) + spec.tv_nsec;
 648 #endif
 649 }
 650
 651 int Main(int argc, char * const argv[], char const * const envp[]) {
 652     bool tty(isatty(STDIN_FILENO));
 653     bool compile(false);
 654     bool target(false);
 655     CYOptions options;
 656
 657     append_history$ = (int (*)(int, const char *)) (dlsym(RTLD_DEFAULT, "append_history"));
 658
 659 #ifdef CY_ATTACH
 660     pid_t pid(_not(pid_t));
 661 #endif
 662
 663     const char *host(NULL);
 664     const char *port(NULL);
 665
 666     optind = 1;
 667
 668     for (;;) {
 669         int option(getopt_long(argc, argv,
 670             "c"
 671             "g:"
 672             "n:"
 673 #ifdef CY_ATTACH
 674             "p:"
 675 #endif
 676             "r:"
 677             "s"
 678         , (const struct option[]) {
 679             {NULL, no_argument, NULL, 'c'},
 680             {NULL, required_argument, NULL, 'g'},
 681             {NULL, required_argument, NULL, 'n'},
 682 #ifdef CY_ATTACH
 683             {NULL, required_argument, NULL, 'p'},
 684 #endif
 685             {NULL, required_argument, NULL, 'r'},
 686             {NULL, no_argument, NULL, 's'},
 687         {0, 0, 0, 0}}, NULL));
 688
 689         switch (option) {
 690             case -1:
 691                 goto getopt;
 692
 693             case ':':
 694             case '?':
 695                 fprintf(stderr,
 696                     "usage: cycript [-c]"
 697 #ifdef CY_ATTACH
 698                     " [-p <pid|name>]"
 699 #endif
 700                     " [-r <host:port>]"
 701                     " [<script> [<arg>...]]\n"
 702                 );
 703                 return 1;
 704
 705             target:
 706                 if (!target)
 707                     target = true;
 708                 else {
 709                     fprintf(stderr, "only one of -[c"
 710 #ifdef CY_ATTACH
 711                     "p"
 712 #endif
 713                     "r] may be used at a time\n");
 714                     return 1;
 715                 }
 716             break;
 717
 718             case 'c':
 719                 compile = true;
 720             goto target;
 721
 722             case 'g':
 723                 if (false);
 724                 else if (strcmp(optarg, "rename") == 0)
 725                     options.verbose_ = true;
 726                 else if (strcmp(optarg, "bison") == 0)
 727                     bison_ = true;
 728                 else if (strcmp(optarg, "timing") == 0)
 729                     timing_ = true;
 730                 else {
 731                     fprintf(stderr, "invalid name for -g\n");
 732                     return 1;
 733                 }
 734             break;
 735
 736             case 'n':
 737                 if (false);
 738                 else if (strcmp(optarg, "minify") == 0)
 739                     pretty_ = true;
 740                 else {
 741                     fprintf(stderr, "invalid name for -n\n");
 742                     return 1;
 743                 }
 744             break;
 745
 746 #ifdef CY_ATTACH
 747             case 'p': {
 748                 size_t size(strlen(optarg));
 749                 char *end;
 750
 751                 pid = strtoul(optarg, &end, 0);
 752                 if (optarg + size != end) {
 753                     // XXX: arg needs to be escaped in some horrendous way of doom
 754                     // XXX: this is a memory leak now because I just don't care enough
 755                     char *command;
 756                     int writ(asprintf(&command, "ps axc|sed -e '/^ *[0-9]/{s/^ *\\([0-9]*\\)\\( *[^ ]*\\)\\{3\\} *-*\\([^ ]*\\)/\\3 \\1/;/^%s /{s/^[^ ]* //;q;};};d'", optarg));
 757                     _assert(writ != -1);
 758
 759                     if (FILE *pids = popen(command, "r")) {
 760                         char value[32];
 761                         size = 0;
 762
 763                         for (;;) {
 764                             size_t read(fread(value + size, 1, sizeof(value) - size, pids));
 765                             if (read == 0)
 766                                 break;
 767                             else {
 768                                 size += read;
 769                                 if (size == sizeof(value))
 770                                     goto fail;
 771                             }
 772                         }
 773
 774                       size:
 775                         if (size == 0)
 776                             goto fail;
 777                         if (value[size - 1] == '\n') {
 778                             --size;
 779                             goto size;
 780                         }
 781
 782                         value[size] = '\0';
 783                         size = strlen(value);
 784                         pid = strtoul(value, &end, 0);
 785                         if (value + size != end) fail:
 786                             pid = _not(pid_t);
 787                         _syscall(pclose(pids));
 788                     }
 789
 790                     if (pid == _not(pid_t)) {
 791                         fprintf(stderr, "unable to find process `%s' using ps\n", optarg);
 792                         return 1;
 793                     }
 794                 }
 795             } goto target;
 796 #endif
 797
 798             case 'r': {
 799                 //size_t size(strlen(optarg));
 800
 801                 char *colon(strrchr(optarg, ':'));
 802                 if (colon == NULL) {
 803                     fprintf(stderr, "missing colon in hostspec\n");
 804                     return 1;
 805                 }
 806
 807                 /*char *end;
 808                 port = strtoul(colon + 1, &end, 10);
 809                 if (end != optarg + size) {
 810                     fprintf(stderr, "invalid port in hostspec\n");
 811                     return 1;
 812                 }*/
 813
 814                 host = optarg;
 815                 *colon = '\0';
 816                 port = colon + 1;
 817             } goto target;
 818
 819             case 's':
 820                 strict_ = true;
 821             break;
 822
 823             default:
 824                 _assert(false);
 825         }
 826     }
 827
 828   getopt:
 829     argc -= optind;
 830     argv += optind;
 831
 832     const char *script;
 833
 834 #ifdef CY_ATTACH
 835     if (pid != _not(pid_t) && argc > 1) {
 836         fprintf(stderr, "-p cannot set argv\n");
 837         return 1;
 838     }
 839 #endif
 840
 841     if (argc == 0)
 842         script = NULL;
 843     else {
 844 #ifdef CY_EXECUTE
 845         // XXX: const_cast?! wtf gcc :(
 846         CYSetArgs(argc - 1, const_cast<const char **>(argv + 1));
 847 #endif
 848         script = argv[0];
 849         if (strcmp(script, "-") == 0)
 850             script = NULL;
 851     }
 852
 853 #ifdef CY_ATTACH
 854     if (pid == _not(pid_t))
 855         client_ = -1;
 856     else {
 857         struct Socket {
 858             int fd_;
 859
 860             Socket(int fd) :
 861                 fd_(fd)
 862             {
 863             }
 864
 865             ~Socket() {
 866                 close(fd_);
 867             }
 868
 869             operator int() {
 870                 return fd_;
 871             }
 872         } server(_syscall(socket(PF_UNIX, SOCK_STREAM, 0)));
 873
 874         struct sockaddr_un address;
 875         memset(&address, 0, sizeof(address));
 876         address.sun_family = AF_UNIX;
 877
 878         const char *tmp;
 879 #if defined(__APPLE__) && (defined(__arm__) || defined(__arm64__))
 880         tmp = "/Library/Caches";
 881 #else
 882         tmp = "/tmp";
 883 #endif
 884
 885         sprintf(address.sun_path, "%s/.s.cy.%u", tmp, getpid());
 886         unlink(address.sun_path);
 887
 888         struct File {
 889             const char *path_;
 890
 891             File(const char *path) :
 892                 path_(path)
 893             {
 894             }
 895
 896             ~File() {
 897                 unlink(path_);
 898             }
 899         } file(address.sun_path);
 900
 901         _syscall(bind(server, reinterpret_cast<sockaddr *>(&address), SUN_LEN(&address)));
 902         _syscall(chmod(address.sun_path, 0777));
 903
 904         _syscall(listen(server, 1));
 905         const char *const argv[] = {address.sun_path, NULL};
 906         InjectLibrary(pid, 1, argv);
 907         client_ = _syscall(accept(server, NULL, NULL));
 908     }
 909 #else
 910     client_ = -1;
 911 #endif
 912
 913     if (client_ == -1 && host != NULL && port != NULL) {
 914         struct addrinfo hints;
 915         memset(&hints, 0, sizeof(hints));
 916         hints.ai_family = AF_UNSPEC;
 917         hints.ai_socktype = SOCK_STREAM;
 918         hints.ai_protocol = 0;
 919         hints.ai_flags = 0;
 920
 921         struct addrinfo *infos;
 922         _syscall(getaddrinfo(host, port, &hints, &infos));
 923
 924         _assert(infos != NULL); try {
 925             for (struct addrinfo *info(infos); info != NULL; info = info->ai_next) {
 926                 int client(_syscall(socket(info->ai_family, info->ai_socktype, info->ai_protocol))); try {
 927                     _syscall(connect(client, info->ai_addr, info->ai_addrlen));
 928                     client_ = client;
 929                     break;
 930                 } catch (...) {
 931                     _syscall(close(client));
 932                     throw;
 933                 }
 934             }
 935         } catch (...) {
 936             freeaddrinfo(infos);
 937             throw;
 938         }
 939     }
 940
 941     if (script == NULL && tty)
 942         Console(options);
 943     else {
 944         std::istream *stream;
 945         if (script == NULL) {
 946             stream = &std::cin;
 947             script = "<stdin>";
 948         } else {
 949             stream = new std::fstream(script, std::ios::in | std::ios::binary);
 950             _assert(!stream->fail());
 951         }
 952
 953         if (timing_) {
 954             std::stringbuf buffer;
 955             stream->get(buffer, '\0');
 956             _assert(!stream->fail());
 957
 958             double average(0);
 959             int samples(-50);
 960             uint64_t start(CYGetTime());
 961
 962             for (;;) {
 963                 stream = new std::istringstream(buffer.str());
 964
 965                 CYPool pool;
 966                 CYDriver driver(pool, *stream, script);
 967                 Setup(driver);
 968
 969                 uint64_t begin(CYGetTime());
 970                 driver.Parse();
 971                 uint64_t end(CYGetTime());
 972
 973                 delete stream;
 974
 975                 average += (end - begin - average) / ++samples;
 976
 977                 uint64_t now(CYGetTime());
 978                 if (samples == 0)
 979                     average = 0;
 980                 else if ((now - start) / 1000000000 >= 1)
 981                     std::cout << std::fixed << average << '\t' << (end - begin) << '\t' << samples << std::endl;
 982                 else continue;
 983
 984                 start = now;
 985             }
 986
 987             stream = new std::istringstream(buffer.str());
 988             std::cin.get();
 989         }
 990
 991         CYPool pool;
 992         CYDriver driver(pool, *stream, script);
 993         Setup(driver);
 994
 995         bool failed(driver.Parse());
 996
 997         if (failed || !driver.errors_.empty()) {
 998             for (CYDriver::Errors::const_iterator i(driver.errors_.begin()); i != driver.errors_.end(); ++i)
 999                 std::cerr << i->location_.begin << ": " << i->message_ << std::endl;
1000         } else if (driver.script_ != NULL) {
1001             std::stringbuf str;
1002             CYOutput out(str, options);
1003             Setup(out, driver, options, true);
1004             out << *driver.script_;
1005             std::string code(str.str());
1006             if (compile)
1007                 std::cout << code;
1008             else {
1009                 CYUTF8String json(Run(pool, client_, code));
1010                 if (CYStartsWith(json, "throw ")) {
1011                     CYLexerHighlight(json.data, json.size, std::cerr);
1012                     std::cerr << std::endl;
1013                     return 1;
1014                 }
1015             }
1016         }
1017     }
1018
1019     return 0;
1020 }
1021
1022 int main(int argc, char * const argv[], char const * const envp[]) {
1023     try {
1024         return Main(argc, argv, envp);
1025     } catch (const CYException &error) {
1026         CYPool pool;
1027         fprintf(stderr, "%s\n", error.PoolCString(pool));
1028         return 1;
1029     }
1030 }