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 template <typename Type_>
 385 static Type_ *CYmemrchr(Type_ *data, Type_ value, size_t size) {
 386     while (size != 0)
 387         if (data[--size] == value)
 388             return data + size;
 389     return NULL;
 390 }
 391
 392 static int CYConsoleKeyReturn(int count, int key) {
 393     if (rl_point != rl_end) {
 394         if (memchr(rl_line_buffer, '\n', rl_end) == NULL)
 395             return rl_newline(count, key);
 396
 397         char *before(CYmemrchr(rl_line_buffer, '\n', rl_point));
 398         if (before == NULL)
 399             before = rl_line_buffer;
 400
 401         int space(before + 1 - rl_line_buffer);
 402         while (space != rl_point && rl_line_buffer[space] == ' ')
 403             ++space;
 404
 405         int adjust(rl_line_buffer + space - 1 - before);
 406         if (space == rl_point && adjust != 0)
 407             rl_rubout(adjust, '\b');
 408
 409         rl_insert(count, '\n');
 410         if (adjust != 0)
 411             rl_insert(adjust, ' ');
 412
 413         return 0;
 414     }
 415
 416     bool done(false);
 417     if (rl_line_buffer[0] == '?')
 418         done = true;
 419     else {
 420         std::string command(rl_line_buffer, rl_end);
 421         command += '\n';
 422         std::istringstream stream(command);
 423
 424         size_t last(std::string::npos);
 425         for (size_t i(0); i != std::string::npos; i = command.find('\n', i + 1))
 426             ++last;
 427
 428         CYPool pool;
 429         CYDriver driver(pool, stream);
 430         if (driver.Parse() || !driver.errors_.empty())
 431             for (CYDriver::Errors::const_iterator error(driver.errors_.begin()); error != driver.errors_.end(); ++error) {
 432                 if (error->location_.begin.line != last + 1)
 433                     done = true;
 434                 break;
 435             }
 436         else
 437             done = true;
 438     }
 439
 440     if (done)
 441         return rl_newline(count, key);
 442
 443     rl_insert(count, '\n');
 444     return 0;
 445 }
 446
 447 static int CYConsoleKeyUp(int count, int key) {
 448     while (count-- != 0) {
 449         char *after(CYmemrchr(rl_line_buffer, '\n', rl_point));
 450         if (after == NULL) {
 451             if (int value = rl_get_previous_history(1, key))
 452                 return value;
 453             continue;
 454         }
 455
 456         char *before(CYmemrchr(rl_line_buffer, '\n', after - rl_line_buffer));
 457         if (before == NULL)
 458             before = rl_line_buffer - 1;
 459
 460         ptrdiff_t offset(rl_line_buffer + rl_point - after);
 461         if (offset > after - before)
 462             rl_point = after - rl_line_buffer;
 463         else
 464             rl_point = before + offset - rl_line_buffer;
 465     }
 466
 467     return 0;
 468 }
 469
 470 static int CYConsoleKeyDown(int count, int key) {
 471     while (count-- != 0) {
 472         char *after(static_cast<char *>(memchr(rl_line_buffer + rl_point, '\n', rl_end - rl_point)));
 473         if (after == NULL) {
 474             int where(where_history());
 475             if (int value = rl_get_next_history(1, key))
 476                 return value;
 477             if (where != where_history()) {
 478                 char *first(static_cast<char *>(memchr(rl_line_buffer, '\n', rl_end)));
 479                 if (first != NULL)
 480                     rl_point = first - 1 - rl_line_buffer;
 481             }
 482             continue;
 483         }
 484
 485         char *before(CYmemrchr(rl_line_buffer, '\n', rl_point));
 486         if (before == NULL)
 487             before = rl_line_buffer - 1;
 488
 489         char *next(static_cast<char *>(memchr(after + 1, '\n', rl_line_buffer + rl_end - after - 1)));
 490         if (next == NULL)
 491             next = rl_line_buffer + rl_end;
 492
 493         ptrdiff_t offset(rl_line_buffer + rl_point - before);
 494         if (offset > next - after)
 495             rl_point = next - rl_line_buffer;
 496         else
 497             rl_point = after + offset - rl_line_buffer;
 498     }
 499
 500     return 0;
 501 }
 502
 503 static int CYConsoleLineBegin(int count, int key) {
 504     while (rl_point != 0 && rl_line_buffer[rl_point - 1] != '\n')
 505         --rl_point;
 506     return 0;
 507 }
 508
 509 static int CYConsoleLineEnd(int count, int key) {
 510     while (rl_point != rl_end && rl_line_buffer[rl_point] != '\n')
 511         ++rl_point;
 512     if (rl_point != rl_end && rl_editing_mode == 0)
 513         --rl_point;
 514     return 0;
 515 }
 516
 517 static int CYConsoleKeyBack(int count, int key) {
 518     while (count-- != 0) {
 519         char *before(CYmemrchr(rl_line_buffer, '\n', rl_point));
 520         if (before == NULL)
 521             return rl_rubout(count, key);
 522
 523         int start(before + 1 - rl_line_buffer);
 524         if (start == rl_point) rubout: {
 525             rl_rubout(1, key);
 526             continue;
 527         }
 528
 529         for (int i(start); i != rl_point; ++i)
 530             if (rl_line_buffer[i] != ' ')
 531                 goto rubout;
 532         rl_rubout((rl_point - start) % 4 ?: 4, key);
 533     }
 534
 535     return 0;
 536 }
 537
 538 static int CYConsoleKeyTab(int count, int key) {
 539     char *before(CYmemrchr(rl_line_buffer, '\n', rl_point));
 540     if (before == NULL) complete:
 541         return rl_complete_internal(rl_completion_mode(&CYConsoleKeyTab));
 542     int start(before + 1 - rl_line_buffer);
 543     for (int i(start); i != rl_point; ++i)
 544         if (rl_line_buffer[i] != ' ')
 545             goto complete;
 546     return rl_insert(4 - (rl_point - start) % 4, ' ');
 547 }
 548
 549 static void CYConsoleRemapBind(Keymap map, rl_command_func_t *from, rl_command_func_t *to) {
 550     char **keyseqs(rl_invoking_keyseqs_in_map(from, map));
 551     if (keyseqs == NULL)
 552         return;
 553     for (char **keyseq(keyseqs); *keyseq != NULL; ++keyseq) {
 554         rl_bind_keyseq_in_map(*keyseq, to, map);
 555         free(*keyseq);
 556     }
 557     free(keyseqs);
 558 }
 559
 560 static void CYConsoleRemapKeys(Keymap map) {
 561     CYConsoleRemapBind(map, &rl_beg_of_line, &CYConsoleLineBegin);
 562     CYConsoleRemapBind(map, &rl_end_of_line, &CYConsoleLineEnd);
 563
 564     CYConsoleRemapBind(map, &rl_get_previous_history, &CYConsoleKeyUp);
 565     CYConsoleRemapBind(map, &rl_get_next_history, &CYConsoleKeyDown);
 566
 567     CYConsoleRemapBind(map, &rl_rubout, &CYConsoleKeyBack);
 568     CYConsoleRemapBind(map, &rl_complete, &CYConsoleKeyTab);
 569 }
 570
 571 static void CYConsolePrepTerm(int meta) {
 572     rl_prep_terminal(meta);
 573
 574     CYConsoleRemapKeys(emacs_standard_keymap);
 575     CYConsoleRemapKeys(emacs_meta_keymap);
 576     CYConsoleRemapKeys(emacs_ctlx_keymap);
 577     CYConsoleRemapKeys(vi_insertion_keymap);
 578     CYConsoleRemapKeys(vi_movement_keymap);
 579 }
 580
 581 static void Console(CYOptions &options) {
 582     std::string basedir;
 583     if (const char *home = getenv("HOME"))
 584         basedir = home;
 585     else {
 586         passwd *passwd;
 587         if (const char *username = getenv("LOGNAME"))
 588             passwd = getpwnam(username);
 589         else
 590             passwd = getpwuid(getuid());
 591         basedir = passwd->pw_dir;
 592     }
 593
 594     basedir += "/.cycript";
 595     mkdir(basedir.c_str(), 0700);
 596
 597     rl_initialize();
 598     rl_readline_name = name_;
 599
 600     History history(basedir + "/history");
 601
 602     bool bypass(false);
 603     bool debug(false);
 604     bool expand(false);
 605     bool lower(true);
 606
 607     out_ = &std::cout;
 608
 609     rl_completer_word_break_characters = break_;
 610     rl_attempted_completion_function = &Complete;
 611
 612     rl_redisplay_function = CYDisplayUpdate;
 613     rl_prep_term_function = CYConsolePrepTerm;
 614
 615     struct sigaction action;
 616     sigemptyset(&action.sa_mask);
 617     action.sa_handler = &sigint;
 618     action.sa_flags = 0;
 619     sigaction(SIGINT, &action, NULL);
 620
 621     for (;;) {
 622         if (setjmp(ctrlc_) != 0) {
 623             mode_ = Working;
 624             *out_ << std::endl;
 625             continue;
 626         }
 627
 628         if (bypass) {
 629             rl_bind_key('\r', &rl_newline);
 630             rl_bind_key('\n', &rl_newline);
 631         } else {
 632             rl_bind_key('\r', &CYConsoleKeyReturn);
 633             rl_bind_key('\n', &CYConsoleKeyReturn);
 634         }
 635
 636         mode_ = Parsing;
 637         char *line(readline("cy# "));
 638         mode_ = Working;
 639
 640         if (line == NULL) {
 641             *out_ << std::endl;
 642             break;
 643         }
 644
 645         std::string command(line);
 646         free(line);
 647         if (command.empty())
 648             continue;
 649
 650         if (command[0] == '?') {
 651             std::string data(command.substr(1));
 652             if (data == "bypass") {
 653                 bypass = !bypass;
 654                 *out_ << "bypass == " << (bypass ? "true" : "false") << std::endl;
 655             } else if (data == "debug") {
 656                 debug = !debug;
 657                 *out_ << "debug == " << (debug ? "true" : "false") << std::endl;
 658             } else if (data == "destroy") {
 659                 CYDestroyContext();
 660             } else if (data == "gc") {
 661                 *out_ << "collecting... " << std::flush;
 662                 CYGarbageCollect(CYGetJSContext());
 663                 *out_ << "done." << std::endl;
 664             } else if (data == "exit") {
 665                 return;
 666             } else if (data == "expand") {
 667                 expand = !expand;
 668                 *out_ << "expand == " << (expand ? "true" : "false") << std::endl;
 669             } else if (data == "lower") {
 670                 lower = !lower;
 671                 *out_ << "lower == " << (lower ? "true" : "false") << std::endl;
 672             }
 673
 674             history += command;
 675             continue;
 676         }
 677
 678         std::string code;
 679         if (bypass)
 680             code = command;
 681         else {
 682             std::istringstream stream(command);
 683
 684             CYPool pool;
 685             CYDriver driver(pool, stream);
 686             Setup(driver);
 687
 688             if (driver.Parse() || !driver.errors_.empty()) {
 689                 for (CYDriver::Errors::const_iterator error(driver.errors_.begin()); error != driver.errors_.end(); ++error) {
 690                     CYPosition begin(error->location_.begin);
 691                     CYPosition end(error->location_.end);
 692
 693                     /*if (begin.line != lines2.size()) {
 694                         std::cerr << "  | ";
 695                         std::cerr << lines2[begin.line - 1] << std::endl;
 696                     }*/
 697
 698                     std::cerr << "....";
 699                     for (size_t i(0); i != begin.column; ++i)
 700                         std::cerr << '.';
 701                     if (begin.line != end.line || begin.column == end.column)
 702                         std::cerr << '^';
 703                     else for (size_t i(0), e(end.column - begin.column); i != e; ++i)
 704                         std::cerr << '^';
 705                     std::cerr << std::endl;
 706
 707                     std::cerr << "  | ";
 708                     std::cerr << error->message_ << std::endl;
 709
 710                     history += command;
 711                     break;
 712                 }
 713
 714                 continue;
 715             }
 716
 717             if (driver.script_ == NULL)
 718                 continue;
 719
 720             std::stringbuf str;
 721             CYOutput out(str, options);
 722             Setup(out, driver, options, lower);
 723             out << *driver.script_;
 724             code = str.str();
 725         }
 726
 727         history += command;
 728
 729         if (debug) {
 730             std::cout << "cy= ";
 731             CYLexerHighlight(code.c_str(), code.size(), std::cout);
 732             std::cout << std::endl;
 733         }
 734
 735         CYPool pool;
 736         Output(Run(pool, client_, code), &std::cout, expand);
 737     }
 738 }
 739
 740 void InjectLibrary(pid_t, int, const char *const []);
 741
 742 static uint64_t CYGetTime() {
 743 #ifdef __APPLE__
 744     return mach_absolute_time();
 745 #else
 746     struct timespec spec;
 747     clock_gettime(CLOCK_MONOTONIC, &spec);
 748     return spec.tv_sec * UINT64_C(1000000000) + spec.tv_nsec;
 749 #endif
 750 }
 751
 752 int Main(int argc, char * const argv[], char const * const envp[]) {
 753     bool tty(isatty(STDIN_FILENO));
 754     bool compile(false);
 755     bool target(false);
 756     CYOptions options;
 757
 758     append_history$ = (int (*)(int, const char *)) (dlsym(RTLD_DEFAULT, "append_history"));
 759
 760 #ifdef CY_ATTACH
 761     pid_t pid(_not(pid_t));
 762 #endif
 763
 764     const char *host(NULL);
 765     const char *port(NULL);
 766
 767     optind = 1;
 768
 769     for (;;) {
 770         int option(getopt_long(argc, argv,
 771             "c"
 772             "g:"
 773             "n:"
 774 #ifdef CY_ATTACH
 775             "p:"
 776 #endif
 777             "r:"
 778             "s"
 779         , (const struct option[]) {
 780             {NULL, no_argument, NULL, 'c'},
 781             {NULL, required_argument, NULL, 'g'},
 782             {NULL, required_argument, NULL, 'n'},
 783 #ifdef CY_ATTACH
 784             {NULL, required_argument, NULL, 'p'},
 785 #endif
 786             {NULL, required_argument, NULL, 'r'},
 787             {NULL, no_argument, NULL, 's'},
 788         {0, 0, 0, 0}}, NULL));
 789
 790         switch (option) {
 791             case -1:
 792                 goto getopt;
 793
 794             case ':':
 795             case '?':
 796                 fprintf(stderr,
 797                     "usage: cycript [-c]"
 798 #ifdef CY_ATTACH
 799                     " [-p <pid|name>]"
 800 #endif
 801                     " [-r <host:port>]"
 802                     " [<script> [<arg>...]]\n"
 803                 );
 804                 return 1;
 805
 806             target:
 807                 if (!target)
 808                     target = true;
 809                 else {
 810                     fprintf(stderr, "only one of -[c"
 811 #ifdef CY_ATTACH
 812                     "p"
 813 #endif
 814                     "r] may be used at a time\n");
 815                     return 1;
 816                 }
 817             break;
 818
 819             case 'c':
 820                 compile = true;
 821             goto target;
 822
 823             case 'g':
 824                 if (false);
 825                 else if (strcmp(optarg, "rename") == 0)
 826                     options.verbose_ = true;
 827                 else if (strcmp(optarg, "bison") == 0)
 828                     bison_ = true;
 829                 else if (strcmp(optarg, "timing") == 0)
 830                     timing_ = true;
 831                 else {
 832                     fprintf(stderr, "invalid name for -g\n");
 833                     return 1;
 834                 }
 835             break;
 836
 837             case 'n':
 838                 if (false);
 839                 else if (strcmp(optarg, "minify") == 0)
 840                     pretty_ = true;
 841                 else {
 842                     fprintf(stderr, "invalid name for -n\n");
 843                     return 1;
 844                 }
 845             break;
 846
 847 #ifdef CY_ATTACH
 848             case 'p': {
 849                 size_t size(strlen(optarg));
 850                 char *end;
 851
 852                 pid = strtoul(optarg, &end, 0);
 853                 if (optarg + size != end) {
 854                     // XXX: arg needs to be escaped in some horrendous way of doom
 855                     // XXX: this is a memory leak now because I just don't care enough
 856                     char *command;
 857                     int writ(asprintf(&command, "ps axc|sed -e '/^ *[0-9]/{s/^ *\\([0-9]*\\)\\( *[^ ]*\\)\\{3\\} *-*\\([^ ]*\\)/\\3 \\1/;/^%s /{s/^[^ ]* //;q;};};d'", optarg));
 858                     _assert(writ != -1);
 859
 860                     if (FILE *pids = popen(command, "r")) {
 861                         char value[32];
 862                         size = 0;
 863
 864                         for (;;) {
 865                             size_t read(fread(value + size, 1, sizeof(value) - size, pids));
 866                             if (read == 0)
 867                                 break;
 868                             else {
 869                                 size += read;
 870                                 if (size == sizeof(value))
 871                                     goto fail;
 872                             }
 873                         }
 874
 875                       size:
 876                         if (size == 0)
 877                             goto fail;
 878                         if (value[size - 1] == '\n') {
 879                             --size;
 880                             goto size;
 881                         }
 882
 883                         value[size] = '\0';
 884                         size = strlen(value);
 885                         pid = strtoul(value, &end, 0);
 886                         if (value + size != end) fail:
 887                             pid = _not(pid_t);
 888                         _syscall(pclose(pids));
 889                     }
 890
 891                     if (pid == _not(pid_t)) {
 892                         fprintf(stderr, "unable to find process `%s' using ps\n", optarg);
 893                         return 1;
 894                     }
 895                 }
 896             } goto target;
 897 #endif
 898
 899             case 'r': {
 900                 //size_t size(strlen(optarg));
 901
 902                 char *colon(strrchr(optarg, ':'));
 903                 if (colon == NULL) {
 904                     fprintf(stderr, "missing colon in hostspec\n");
 905                     return 1;
 906                 }
 907
 908                 /*char *end;
 909                 port = strtoul(colon + 1, &end, 10);
 910                 if (end != optarg + size) {
 911                     fprintf(stderr, "invalid port in hostspec\n");
 912                     return 1;
 913                 }*/
 914
 915                 host = optarg;
 916                 *colon = '\0';
 917                 port = colon + 1;
 918             } goto target;
 919
 920             case 's':
 921                 strict_ = true;
 922             break;
 923
 924             default:
 925                 _assert(false);
 926         }
 927     }
 928
 929   getopt:
 930     argc -= optind;
 931     argv += optind;
 932
 933     const char *script;
 934
 935 #ifdef CY_ATTACH
 936     if (pid != _not(pid_t) && argc > 1) {
 937         fprintf(stderr, "-p cannot set argv\n");
 938         return 1;
 939     }
 940 #endif
 941
 942     if (argc == 0)
 943         script = NULL;
 944     else {
 945 #ifdef CY_EXECUTE
 946         // XXX: const_cast?! wtf gcc :(
 947         CYSetArgs(argc - 1, const_cast<const char **>(argv + 1));
 948 #endif
 949         script = argv[0];
 950         if (strcmp(script, "-") == 0)
 951             script = NULL;
 952     }
 953
 954 #ifdef CY_ATTACH
 955     if (pid == _not(pid_t))
 956         client_ = -1;
 957     else {
 958         struct Socket {
 959             int fd_;
 960
 961             Socket(int fd) :
 962                 fd_(fd)
 963             {
 964             }
 965
 966             ~Socket() {
 967                 close(fd_);
 968             }
 969
 970             operator int() {
 971                 return fd_;
 972             }
 973         } server(_syscall(socket(PF_UNIX, SOCK_STREAM, 0)));
 974
 975         struct sockaddr_un address;
 976         memset(&address, 0, sizeof(address));
 977         address.sun_family = AF_UNIX;
 978
 979         const char *tmp;
 980 #if defined(__APPLE__) && (defined(__arm__) || defined(__arm64__))
 981         tmp = "/Library/Caches";
 982 #else
 983         tmp = "/tmp";
 984 #endif
 985
 986         sprintf(address.sun_path, "%s/.s.cy.%u", tmp, getpid());
 987         unlink(address.sun_path);
 988
 989         struct File {
 990             const char *path_;
 991
 992             File(const char *path) :
 993                 path_(path)
 994             {
 995             }
 996
 997             ~File() {
 998                 unlink(path_);
 999             }
1000         } file(address.sun_path);
1001
1002         _syscall(bind(server, reinterpret_cast<sockaddr *>(&address), SUN_LEN(&address)));
1003         _syscall(chmod(address.sun_path, 0777));
1004
1005         _syscall(listen(server, 1));
1006         const char *const argv[] = {address.sun_path, NULL};
1007         InjectLibrary(pid, 1, argv);
1008         client_ = _syscall(accept(server, NULL, NULL));
1009     }
1010 #else
1011     client_ = -1;
1012 #endif
1013
1014     if (client_ == -1 && host != NULL && port != NULL) {
1015         struct addrinfo hints;
1016         memset(&hints, 0, sizeof(hints));
1017         hints.ai_family = AF_UNSPEC;
1018         hints.ai_socktype = SOCK_STREAM;
1019         hints.ai_protocol = 0;
1020         hints.ai_flags = 0;
1021
1022         struct addrinfo *infos;
1023         _syscall(getaddrinfo(host, port, &hints, &infos));
1024
1025         _assert(infos != NULL); try {
1026             for (struct addrinfo *info(infos); info != NULL; info = info->ai_next) {
1027                 int client(_syscall(socket(info->ai_family, info->ai_socktype, info->ai_protocol))); try {
1028                     _syscall(connect(client, info->ai_addr, info->ai_addrlen));
1029                     client_ = client;
1030                     break;
1031                 } catch (...) {
1032                     _syscall(close(client));
1033                     throw;
1034                 }
1035             }
1036         } catch (...) {
1037             freeaddrinfo(infos);
1038             throw;
1039         }
1040     }
1041
1042     if (script == NULL && tty)
1043         Console(options);
1044     else {
1045         std::istream *stream;
1046         if (script == NULL) {
1047             stream = &std::cin;
1048             script = "<stdin>";
1049         } else {
1050             stream = new std::fstream(script, std::ios::in | std::ios::binary);
1051             _assert(!stream->fail());
1052         }
1053
1054         if (timing_) {
1055             std::stringbuf buffer;
1056             stream->get(buffer, '\0');
1057             _assert(!stream->fail());
1058
1059             double average(0);
1060             int samples(-50);
1061             uint64_t start(CYGetTime());
1062
1063             for (;;) {
1064                 stream = new std::istringstream(buffer.str());
1065
1066                 CYPool pool;
1067                 CYDriver driver(pool, *stream, script);
1068                 Setup(driver);
1069
1070                 uint64_t begin(CYGetTime());
1071                 driver.Parse();
1072                 uint64_t end(CYGetTime());
1073
1074                 delete stream;
1075
1076                 average += (end - begin - average) / ++samples;
1077
1078                 uint64_t now(CYGetTime());
1079                 if (samples == 0)
1080                     average = 0;
1081                 else if ((now - start) / 1000000000 >= 1)
1082                     std::cout << std::fixed << average << '\t' << (end - begin) << '\t' << samples << std::endl;
1083                 else continue;
1084
1085                 start = now;
1086             }
1087
1088             stream = new std::istringstream(buffer.str());
1089             std::cin.get();
1090         }
1091
1092         CYPool pool;
1093         CYDriver driver(pool, *stream, script);
1094         Setup(driver);
1095
1096         bool failed(driver.Parse());
1097
1098         if (failed || !driver.errors_.empty()) {
1099             for (CYDriver::Errors::const_iterator i(driver.errors_.begin()); i != driver.errors_.end(); ++i)
1100                 std::cerr << i->location_.begin << ": " << i->message_ << std::endl;
1101         } else if (driver.script_ != NULL) {
1102             std::stringbuf str;
1103             CYOutput out(str, options);
1104             Setup(out, driver, options, true);
1105             out << *driver.script_;
1106             std::string code(str.str());
1107             if (compile)
1108                 std::cout << code;
1109             else {
1110                 CYUTF8String json(Run(pool, client_, code));
1111                 if (CYStartsWith(json, "throw ")) {
1112                     CYLexerHighlight(json.data, json.size, std::cerr);
1113                     std::cerr << std::endl;
1114                     return 1;
1115                 }
1116             }
1117         }
1118     }
1119
1120     return 0;
1121 }
1122
1123 int main(int argc, char * const argv[], char const * const envp[]) {
1124     try {
1125         return Main(argc, argv, envp);
1126     } catch (const CYException &error) {
1127         CYPool pool;
1128         fprintf(stderr, "%s\n", error.PoolCString(pool));
1129         return 1;
1130     }
1131 }