Console.cpp

   1 /* Cycript - The Truly Universal Scripting Language
   2  * Copyright (C) 2009-2016  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 void _lblcall(int (*command)(int, int), int count, int key) {
 393     int last(_rl_last_c_pos);
 394     // rl_rubout crashes in _rl_erase_at_end_of_line if _rl_last_c_pos != 0
 395     if (command == &rl_rubout)
 396         _rl_last_c_pos = 0;
 397     for (int i(0); i != count; ++i)
 398         if (command(1, key) != 0)
 399             _assert(false);
 400     _rl_last_c_pos = last;
 401 }
 402
 403 static int CYConsoleKeyReturn(int count, int key) {
 404     if (rl_point != rl_end) {
 405         if (memchr(rl_line_buffer, '\n', rl_end) == NULL) {
 406             _lblcall(&rl_newline, count, key);
 407             return 0;
 408         }
 409
 410       insert:
 411         char *before(CYmemrchr(rl_line_buffer, '\n', rl_point));
 412         if (before == NULL)
 413             before = rl_line_buffer;
 414
 415         int space(before + 1 - rl_line_buffer);
 416         while (space != rl_point && rl_line_buffer[space] == ' ')
 417             ++space;
 418
 419         int adjust(rl_line_buffer + space - 1 - before);
 420         if (space == rl_point && adjust != 0)
 421             _lblcall(&rl_rubout, adjust, '\b');
 422
 423         _lblcall(&rl_insert, count, '\n');
 424         if (adjust != 0)
 425             _lblcall(&rl_insert, adjust, ' ');
 426
 427         return 0;
 428     }
 429
 430     bool done(false);
 431     if (rl_line_buffer[0] == '?')
 432         done = true;
 433     else {
 434         std::string command(rl_line_buffer, rl_end);
 435         command += '\n';
 436         std::stringbuf stream(command);
 437
 438         size_t last(std::string::npos);
 439         for (size_t i(0); i != std::string::npos; i = command.find('\n', i + 1))
 440             ++last;
 441
 442         CYPool pool;
 443         CYDriver driver(pool, stream);
 444         if (driver.Parse() || !driver.errors_.empty())
 445             for (CYDriver::Errors::const_iterator error(driver.errors_.begin()); error != driver.errors_.end(); ++error) {
 446                 if (error->location_.begin.line != last + 1)
 447                     done = true;
 448                 break;
 449             }
 450         else
 451             done = true;
 452     }
 453
 454     if (done) {
 455         _lblcall(&rl_newline, count, key);
 456         return 0;
 457     }
 458
 459     // XXX: this was the most obvious fix, but is seriously dumb
 460     goto insert;
 461 }
 462
 463 static int CYConsoleKeyUp(int count, int key) {
 464     for (; count != 0; --count) {
 465         char *after(CYmemrchr(rl_line_buffer, '\n', rl_point));
 466         if (after == NULL) {
 467             if (int value = rl_get_previous_history(1, key))
 468                 return value;
 469             continue;
 470         }
 471
 472         char *before(CYmemrchr(rl_line_buffer, '\n', after - rl_line_buffer));
 473         if (before == NULL)
 474             before = rl_line_buffer - 1;
 475
 476         ptrdiff_t offset(rl_line_buffer + rl_point - after);
 477         if (offset > after - before)
 478             rl_point = after - rl_line_buffer;
 479         else
 480             rl_point = before + offset - rl_line_buffer;
 481     }
 482
 483     return 0;
 484 }
 485
 486 static int CYConsoleKeyDown(int count, int key) {
 487     for (; count != 0; --count) {
 488         char *after(static_cast<char *>(memchr(rl_line_buffer + rl_point, '\n', rl_end - rl_point)));
 489         if (after == NULL) {
 490             int where(where_history());
 491             if (int value = rl_get_next_history(1, key))
 492                 return value;
 493             if (where != where_history()) {
 494                 char *first(static_cast<char *>(memchr(rl_line_buffer, '\n', rl_end)));
 495                 if (first != NULL)
 496                     rl_point = first - 1 - rl_line_buffer;
 497             }
 498             continue;
 499         }
 500
 501         char *before(CYmemrchr(rl_line_buffer, '\n', rl_point));
 502         if (before == NULL)
 503             before = rl_line_buffer - 1;
 504
 505         char *next(static_cast<char *>(memchr(after + 1, '\n', rl_line_buffer + rl_end - after - 1)));
 506         if (next == NULL)
 507             next = rl_line_buffer + rl_end;
 508
 509         ptrdiff_t offset(rl_line_buffer + rl_point - before);
 510         if (offset > next - after)
 511             rl_point = next - rl_line_buffer;
 512         else
 513             rl_point = after + offset - rl_line_buffer;
 514     }
 515
 516     return 0;
 517 }
 518
 519 static int CYConsoleLineBegin(int count, int key) {
 520     while (rl_point != 0 && rl_line_buffer[rl_point - 1] != '\n')
 521         --rl_point;
 522     return 0;
 523 }
 524
 525 static int CYConsoleLineEnd(int count, int key) {
 526     while (rl_point != rl_end && rl_line_buffer[rl_point] != '\n')
 527         ++rl_point;
 528     if (rl_point != rl_end && rl_editing_mode == 0)
 529         --rl_point;
 530     return 0;
 531 }
 532
 533 static int CYConsoleKeyBack(int count, int key) {
 534     for (; count != 0; --count) {
 535         if (rl_point == 0)
 536             return 1;
 537
 538         char *before(CYmemrchr(rl_line_buffer, '\n', rl_point));
 539         if (before == NULL) {
 540             int adjust(std::min(count, rl_point));
 541             _lblcall(&rl_rubout, adjust, key);
 542             count -= adjust - 1;
 543             continue;
 544         }
 545
 546         int start(before + 1 - rl_line_buffer);
 547         if (start == rl_point) rubout: {
 548             _lblcall(&rl_rubout, 1, key);
 549             continue;
 550         }
 551
 552         for (int i(start); i != rl_point; ++i)
 553             if (rl_line_buffer[i] != ' ')
 554                 goto rubout;
 555         _lblcall(&rl_rubout, (rl_point - start) % 4 ?: 4, key);
 556     }
 557
 558     return 0;
 559 }
 560
 561 static int CYConsoleKeyTab(int count, int key) {
 562     char *before(CYmemrchr(rl_line_buffer, '\n', rl_point));
 563     if (before == NULL) complete:
 564         return rl_complete_internal(rl_completion_mode(&CYConsoleKeyTab));
 565     int start(before + 1 - rl_line_buffer);
 566     for (int i(start); i != rl_point; ++i)
 567         if (rl_line_buffer[i] != ' ')
 568             goto complete;
 569     _lblcall(&rl_insert, 4 - (rl_point - start) % 4, ' ');
 570     return 0;
 571 }
 572
 573 static void CYConsoleRemapBind(Keymap map, rl_command_func_t *from, rl_command_func_t *to) {
 574     char **keyseqs(rl_invoking_keyseqs_in_map(from, map));
 575     if (keyseqs == NULL)
 576         return;
 577     for (char **keyseq(keyseqs); *keyseq != NULL; ++keyseq) {
 578         rl_bind_keyseq_in_map(*keyseq, to, map);
 579         free(*keyseq);
 580     }
 581     free(keyseqs);
 582 }
 583
 584 static void CYConsoleRemapKeys(Keymap map) {
 585     CYConsoleRemapBind(map, &rl_beg_of_line, &CYConsoleLineBegin);
 586     CYConsoleRemapBind(map, &rl_end_of_line, &CYConsoleLineEnd);
 587
 588     CYConsoleRemapBind(map, &rl_get_previous_history, &CYConsoleKeyUp);
 589     CYConsoleRemapBind(map, &rl_get_next_history, &CYConsoleKeyDown);
 590
 591     CYConsoleRemapBind(map, &rl_rubout, &CYConsoleKeyBack);
 592     CYConsoleRemapBind(map, &rl_complete, &CYConsoleKeyTab);
 593 }
 594
 595 static void CYConsolePrepTerm(int meta) {
 596     rl_prep_terminal(meta);
 597
 598     CYConsoleRemapKeys(emacs_standard_keymap);
 599     CYConsoleRemapKeys(emacs_meta_keymap);
 600     CYConsoleRemapKeys(emacs_ctlx_keymap);
 601     CYConsoleRemapKeys(vi_insertion_keymap);
 602     CYConsoleRemapKeys(vi_movement_keymap);
 603 }
 604
 605 static void Console(CYOptions &options) {
 606     std::string basedir;
 607     if (const char *home = getenv("HOME"))
 608         basedir = home;
 609     else {
 610         passwd *passwd;
 611         if (const char *username = getenv("LOGNAME"))
 612             passwd = getpwnam(username);
 613         else
 614             passwd = getpwuid(getuid());
 615         basedir = passwd->pw_dir;
 616     }
 617
 618     basedir += "/.cycript";
 619     mkdir(basedir.c_str(), 0700);
 620
 621     rl_initialize();
 622     rl_readline_name = name_;
 623
 624     History history(basedir + "/history");
 625
 626     bool bypass(false);
 627     bool debug(false);
 628     bool expand(false);
 629     bool lower(true);
 630
 631     out_ = &std::cout;
 632
 633     rl_completer_word_break_characters = break_;
 634     rl_attempted_completion_function = &Complete;
 635
 636     rl_redisplay_function = CYDisplayUpdate;
 637     rl_prep_term_function = CYConsolePrepTerm;
 638
 639     struct sigaction action;
 640     sigemptyset(&action.sa_mask);
 641     action.sa_handler = &sigint;
 642     action.sa_flags = 0;
 643     sigaction(SIGINT, &action, NULL);
 644
 645     for (;;) {
 646         if (setjmp(ctrlc_) != 0) {
 647             mode_ = Working;
 648             *out_ << std::endl;
 649             continue;
 650         }
 651
 652         if (bypass) {
 653             rl_bind_key('\r', &rl_newline);
 654             rl_bind_key('\n', &rl_newline);
 655         } else {
 656             rl_bind_key('\r', &CYConsoleKeyReturn);
 657             rl_bind_key('\n', &CYConsoleKeyReturn);
 658         }
 659
 660         mode_ = Parsing;
 661         char *line(readline("cy# "));
 662         mode_ = Working;
 663
 664         if (line == NULL) {
 665             *out_ << std::endl;
 666             break;
 667         }
 668
 669         std::string command(line);
 670         free(line);
 671         if (command.empty())
 672             continue;
 673         history += command;
 674
 675         if (command[0] == '?') {
 676             std::string data(command.substr(1));
 677             if (data == "bypass") {
 678                 bypass = !bypass;
 679                 *out_ << "bypass == " << (bypass ? "true" : "false") << std::endl;
 680             } else if (data == "debug") {
 681                 debug = !debug;
 682                 *out_ << "debug == " << (debug ? "true" : "false") << std::endl;
 683             } else if (data == "destroy") {
 684                 CYDestroyContext();
 685             } else if (data == "gc") {
 686                 *out_ << "collecting... " << std::flush;
 687                 CYGarbageCollect(CYGetJSContext());
 688                 *out_ << "done." << std::endl;
 689             } else if (data == "exit") {
 690                 return;
 691             } else if (data == "expand") {
 692                 expand = !expand;
 693                 *out_ << "expand == " << (expand ? "true" : "false") << std::endl;
 694             } else if (data == "lower") {
 695                 lower = !lower;
 696                 *out_ << "lower == " << (lower ? "true" : "false") << std::endl;
 697             }
 698
 699             continue;
 700         }
 701
 702         std::string code;
 703         if (bypass)
 704             code = command;
 705         else try {
 706             std::stringbuf stream(command);
 707
 708             CYPool pool;
 709             CYDriver driver(pool, stream);
 710             Setup(driver);
 711
 712             if (driver.Parse() || !driver.errors_.empty()) {
 713                 for (CYDriver::Errors::const_iterator error(driver.errors_.begin()); error != driver.errors_.end(); ++error) {
 714                     CYPosition begin(error->location_.begin);
 715                     CYPosition end(error->location_.end);
 716
 717                     /*if (begin.line != lines2.size()) {
 718                         std::cerr << "  | ";
 719                         std::cerr << lines2[begin.line - 1] << std::endl;
 720                     }*/
 721
 722                     std::cerr << "....";
 723                     for (size_t i(0); i != begin.column; ++i)
 724                         std::cerr << '.';
 725                     if (begin.line != end.line || begin.column == end.column)
 726                         std::cerr << '^';
 727                     else for (size_t i(0), e(end.column - begin.column); i != e; ++i)
 728                         std::cerr << '^';
 729                     std::cerr << std::endl;
 730
 731                     std::cerr << "  | ";
 732                     std::cerr << error->message_ << std::endl;
 733
 734                     break;
 735                 }
 736
 737                 continue;
 738             }
 739
 740             if (driver.script_ == NULL)
 741                 continue;
 742
 743             std::stringbuf str;
 744             CYOutput out(str, options);
 745             Setup(out, driver, options, lower);
 746             out << *driver.script_;
 747             code = str.str();
 748         } catch (const CYException &error) {
 749             CYPool pool;
 750             std::cout << error.PoolCString(pool) << std::endl;
 751             continue;
 752         }
 753
 754         if (debug) {
 755             std::cout << "cy= ";
 756             CYLexerHighlight(code.c_str(), code.size(), std::cout);
 757             std::cout << std::endl;
 758         }
 759
 760         CYPool pool;
 761         Output(Run(pool, client_, code), &std::cout, expand);
 762     }
 763 }
 764
 765 void InjectLibrary(pid_t, int, const char *const []);
 766
 767 static uint64_t CYGetTime() {
 768 #ifdef __APPLE__
 769     return mach_absolute_time();
 770 #else
 771     struct timespec spec;
 772     clock_gettime(CLOCK_MONOTONIC, &spec);
 773     return spec.tv_sec * UINT64_C(1000000000) + spec.tv_nsec;
 774 #endif
 775 }
 776
 777 int Main(int argc, char * const argv[], char const * const envp[]) {
 778     bool tty(isatty(STDIN_FILENO));
 779     bool compile(false);
 780     bool target(false);
 781     CYOptions options;
 782
 783     append_history$ = (int (*)(int, const char *)) (dlsym(RTLD_DEFAULT, "append_history"));
 784
 785 #ifdef CY_ATTACH
 786     pid_t pid(_not(pid_t));
 787 #endif
 788
 789     const char *host(NULL);
 790     const char *port(NULL);
 791
 792     optind = 1;
 793
 794     for (;;) {
 795         int option(getopt_long(argc, argv,
 796             "c"
 797             "g:"
 798             "n:"
 799 #ifdef CY_ATTACH
 800             "p:"
 801 #endif
 802             "r:"
 803             "s"
 804         , (const struct option[]) {
 805             {NULL, no_argument, NULL, 'c'},
 806             {NULL, required_argument, NULL, 'g'},
 807             {NULL, required_argument, NULL, 'n'},
 808 #ifdef CY_ATTACH
 809             {NULL, required_argument, NULL, 'p'},
 810 #endif
 811             {NULL, required_argument, NULL, 'r'},
 812             {NULL, no_argument, NULL, 's'},
 813         {0, 0, 0, 0}}, NULL));
 814
 815         switch (option) {
 816             case -1:
 817                 goto getopt;
 818
 819             case ':':
 820             case '?':
 821                 fprintf(stderr,
 822                     "usage: cycript [-c]"
 823 #ifdef CY_ATTACH
 824                     " [-p <pid|name>]"
 825 #endif
 826                     " [-r <host:port>]"
 827                     " [<script> [<arg>...]]\n"
 828                 );
 829                 return 1;
 830
 831             target:
 832                 if (!target)
 833                     target = true;
 834                 else {
 835                     fprintf(stderr, "only one of -[c"
 836 #ifdef CY_ATTACH
 837                     "p"
 838 #endif
 839                     "r] may be used at a time\n");
 840                     return 1;
 841                 }
 842             break;
 843
 844             case 'c':
 845                 compile = true;
 846             goto target;
 847
 848             case 'g':
 849                 if (false);
 850                 else if (strcmp(optarg, "rename") == 0)
 851                     options.verbose_ = true;
 852                 else if (strcmp(optarg, "bison") == 0)
 853                     bison_ = true;
 854                 else if (strcmp(optarg, "timing") == 0)
 855                     timing_ = true;
 856                 else {
 857                     fprintf(stderr, "invalid name for -g\n");
 858                     return 1;
 859                 }
 860             break;
 861
 862             case 'n':
 863                 if (false);
 864                 else if (strcmp(optarg, "minify") == 0)
 865                     pretty_ = true;
 866                 else {
 867                     fprintf(stderr, "invalid name for -n\n");
 868                     return 1;
 869                 }
 870             break;
 871
 872 #ifdef CY_ATTACH
 873             case 'p': {
 874                 size_t size(strlen(optarg));
 875                 char *end;
 876
 877                 pid = strtoul(optarg, &end, 0);
 878                 if (optarg + size != end) {
 879                     // XXX: arg needs to be escaped in some horrendous way of doom
 880                     // XXX: this is a memory leak now because I just don't care enough
 881                     char *command;
 882                     int writ(asprintf(&command, "ps axc|sed -e '/^ *[0-9]/{s/^ *\\([0-9]*\\)\\( *[^ ]*\\)\\{3\\} *-*\\([^ ]*\\)/\\3 \\1/;/^%s /{s/^[^ ]* //;q;};};d'", optarg));
 883                     _assert(writ != -1);
 884
 885                     if (FILE *pids = popen(command, "r")) {
 886                         char value[32];
 887                         size = 0;
 888
 889                         for (;;) {
 890                             size_t read(fread(value + size, 1, sizeof(value) - size, pids));
 891                             if (read == 0)
 892                                 break;
 893                             else {
 894                                 size += read;
 895                                 if (size == sizeof(value))
 896                                     goto fail;
 897                             }
 898                         }
 899
 900                       size:
 901                         if (size == 0)
 902                             goto fail;
 903                         if (value[size - 1] == '\n') {
 904                             --size;
 905                             goto size;
 906                         }
 907
 908                         value[size] = '\0';
 909                         size = strlen(value);
 910                         pid = strtoul(value, &end, 0);
 911                         if (value + size != end) fail:
 912                             pid = _not(pid_t);
 913                         _syscall(pclose(pids));
 914                     }
 915
 916                     if (pid == _not(pid_t)) {
 917                         fprintf(stderr, "unable to find process `%s' using ps\n", optarg);
 918                         return 1;
 919                     }
 920                 }
 921             } goto target;
 922 #endif
 923
 924             case 'r': {
 925                 //size_t size(strlen(optarg));
 926
 927                 char *colon(strrchr(optarg, ':'));
 928                 if (colon == NULL) {
 929                     fprintf(stderr, "missing colon in hostspec\n");
 930                     return 1;
 931                 }
 932
 933                 /*char *end;
 934                 port = strtoul(colon + 1, &end, 10);
 935                 if (end != optarg + size) {
 936                     fprintf(stderr, "invalid port in hostspec\n");
 937                     return 1;
 938                 }*/
 939
 940                 host = optarg;
 941                 *colon = '\0';
 942                 port = colon + 1;
 943             } goto target;
 944
 945             case 's':
 946                 strict_ = true;
 947             break;
 948
 949             default:
 950                 _assert(false);
 951         }
 952     }
 953
 954   getopt:
 955     argc -= optind;
 956     argv += optind;
 957
 958     const char *script;
 959
 960 #ifdef CY_ATTACH
 961     if (pid != _not(pid_t) && argc > 1) {
 962         fprintf(stderr, "-p cannot set argv\n");
 963         return 1;
 964     }
 965 #endif
 966
 967     if (argc == 0)
 968         script = NULL;
 969     else {
 970 #ifdef CY_EXECUTE
 971         // XXX: const_cast?! wtf gcc :(
 972         CYSetArgs(argc - 1, const_cast<const char **>(argv + 1));
 973 #endif
 974         script = argv[0];
 975         if (strcmp(script, "-") == 0)
 976             script = NULL;
 977     }
 978
 979 #ifdef CY_ATTACH
 980     if (pid == _not(pid_t))
 981         client_ = -1;
 982     else {
 983         struct Socket {
 984             int fd_;
 985
 986             Socket(int fd) :
 987                 fd_(fd)
 988             {
 989             }
 990
 991             ~Socket() {
 992                 close(fd_);
 993             }
 994
 995             operator int() {
 996                 return fd_;
 997             }
 998         } server(_syscall(socket(PF_UNIX, SOCK_STREAM, 0)));
 999
1000         struct sockaddr_un address;
1001         memset(&address, 0, sizeof(address));
1002         address.sun_family = AF_UNIX;
1003
1004         const char *tmp;
1005 #if defined(__APPLE__) && (defined(__arm__) || defined(__arm64__))
1006         tmp = "/Library/Caches";
1007 #else
1008         tmp = "/tmp";
1009 #endif
1010
1011         sprintf(address.sun_path, "%s/.s.cy.%u", tmp, getpid());
1012         unlink(address.sun_path);
1013
1014         struct File {
1015             const char *path_;
1016
1017             File(const char *path) :
1018                 path_(path)
1019             {
1020             }
1021
1022             ~File() {
1023                 unlink(path_);
1024             }
1025         } file(address.sun_path);
1026
1027         _syscall(bind(server, reinterpret_cast<sockaddr *>(&address), SUN_LEN(&address)));
1028         _syscall(chmod(address.sun_path, 0777));
1029
1030         _syscall(listen(server, 1));
1031         const char *const argv[] = {address.sun_path, NULL};
1032         InjectLibrary(pid, 1, argv);
1033         client_ = _syscall(accept(server, NULL, NULL));
1034     }
1035 #else
1036     client_ = -1;
1037 #endif
1038
1039     if (client_ == -1 && host != NULL && port != NULL) {
1040         struct addrinfo hints;
1041         memset(&hints, 0, sizeof(hints));
1042         hints.ai_family = AF_UNSPEC;
1043         hints.ai_socktype = SOCK_STREAM;
1044         hints.ai_protocol = 0;
1045         hints.ai_flags = 0;
1046
1047         struct addrinfo *infos;
1048         _syscall(getaddrinfo(host, port, &hints, &infos));
1049
1050         _assert(infos != NULL); try {
1051             for (struct addrinfo *info(infos); info != NULL; info = info->ai_next) {
1052                 int client(_syscall(socket(info->ai_family, info->ai_socktype, info->ai_protocol))); try {
1053                     _syscall(connect(client, info->ai_addr, info->ai_addrlen));
1054                     client_ = client;
1055                     break;
1056                 } catch (...) {
1057                     _syscall(close(client));
1058                     throw;
1059                 }
1060             }
1061         } catch (...) {
1062             freeaddrinfo(infos);
1063             throw;
1064         }
1065     }
1066
1067     if (script == NULL && tty)
1068         Console(options);
1069     else {
1070         std::istream *stream;
1071         if (script == NULL) {
1072             stream = &std::cin;
1073             script = "<stdin>";
1074         } else {
1075             stream = new std::fstream(script, std::ios::in | std::ios::binary);
1076             _assert(!stream->fail());
1077         }
1078
1079         if (timing_) {
1080             std::stringbuf buffer;
1081             stream->get(buffer, '\0');
1082             _assert(!stream->fail());
1083
1084             double average(0);
1085             int samples(-50);
1086             uint64_t start(CYGetTime());
1087
1088             for (;;) {
1089                 stream = new std::istringstream(buffer.str());
1090
1091                 CYPool pool;
1092                 CYDriver driver(pool, *stream->rdbuf(), script);
1093                 Setup(driver);
1094
1095                 uint64_t begin(CYGetTime());
1096                 driver.Parse();
1097                 uint64_t end(CYGetTime());
1098
1099                 delete stream;
1100
1101                 average += (end - begin - average) / ++samples;
1102
1103                 uint64_t now(CYGetTime());
1104                 if (samples == 0)
1105                     average = 0;
1106                 else if ((now - start) / 1000000000 >= 1)
1107                     std::cout << std::fixed << average << '\t' << (end - begin) << '\t' << samples << std::endl;
1108                 else continue;
1109
1110                 start = now;
1111             }
1112
1113             stream = new std::istringstream(buffer.str());
1114             std::cin.get();
1115         }
1116
1117         CYPool pool;
1118         CYDriver driver(pool, *stream->rdbuf(), script);
1119         Setup(driver);
1120
1121         bool failed(driver.Parse());
1122
1123         if (failed || !driver.errors_.empty()) {
1124             for (CYDriver::Errors::const_iterator i(driver.errors_.begin()); i != driver.errors_.end(); ++i)
1125                 std::cerr << i->location_.begin << ": " << i->message_ << std::endl;
1126             return 1;
1127         } else if (driver.script_ != NULL) {
1128             std::stringbuf str;
1129             CYOutput out(str, options);
1130             Setup(out, driver, options, true);
1131             out << *driver.script_;
1132             std::string code(str.str());
1133             if (compile)
1134                 std::cout << code;
1135             else {
1136                 CYUTF8String json(Run(pool, client_, code));
1137                 if (CYStartsWith(json, "throw ")) {
1138                     CYLexerHighlight(json.data, json.size, std::cerr);
1139                     std::cerr << std::endl;
1140                     return 1;
1141                 }
1142             }
1143         }
1144     }
1145
1146     return 0;
1147 }
1148
1149 int main(int argc, char * const argv[], char const * const envp[]) {
1150     try {
1151         return Main(argc, argv, envp);
1152     } catch (const CYException &error) {
1153         CYPool pool;
1154         fprintf(stderr, "%s\n", error.PoolCString(pool));
1155         return 1;
1156     }
1157 }