src/lyx_main.C

   1 /* This file is part of
   2  * ======================================================
   3  *
   4  *           LyX, The Document Processor
   5  *
   6  *           Copyright 1995 Matthias Ettrich
   7  *           Copyright 1995-2000 The LyX Team.
   8  *
   9  * ====================================================== */
  10
  11 #include <config.h>
  12
  13 #include <cstdlib>
  14 #include <csignal>
  15
  16 #include "version.h"
  17 #include "lyx_main.h"
  18 #include "lyx_gui.h"
  19 #include "LyXView.h"
  20 #include "lyxfunc.h"
  21 #include "lyx_gui_misc.h"
  22 #include "lyxrc.h"
  23 #include "support/path.h"
  24 #include "support/filetools.h"
  25 #include "bufferlist.h"
  26 #include "debug.h"
  27 #include "support/FileInfo.h"
  28 #include "lastfiles.h"
  29 #include "intl.h"
  30 #include "lyxserver.h"
  31 #include "layout.h"
  32 #include "gettext.h"
  33 #include "kbmap.h"
  34
  35 using std::endl;
  36
  37 extern void LoadLyXFile(string const &);
  38
  39 string system_lyxdir;
  40 string build_lyxdir;
  41 string system_tempdir;
  42 string user_lyxdir;     // Default $HOME/.lyx
  43
  44 // Should this be kept global? Asger says Yes.
  45 DebugStream lyxerr;
  46
  47 LastFiles * lastfiles;
  48
  49 // This is the global bufferlist object
  50 BufferList bufferlist;
  51
  52 LyXServer * lyxserver = 0;
  53 // this should be static, but I need it in buffer.C
  54 bool finished = false;  // flag, that we are quitting the program
  55
  56 // convenient to have it here.
  57 kb_keymap * toplevel_keymap;
  58
  59
  60 LyX::LyX(int * argc, char * argv[])
  61 {
  62         // Prevent crash with --help
  63         lyxGUI = 0;
  64         lastfiles = 0;
  65
  66         // Here we need to parse the command line. At least
  67         // we need to parse for "-dbg" and "-help"
  68         bool gui = easyParse(argc, argv);
  69
  70         // Global bindings (this must be done as early as possible.) (Lgb)
  71         toplevel_keymap = new kb_keymap;
  72         defaultKeyBindings(toplevel_keymap);
  73
  74         // Make the GUI object, and let it take care of the
  75         // command line arguments that concerns it.
  76         lyxerr[Debug::INIT] << "Initializing LyXGUI..." << endl;
  77         lyxGUI = new LyXGUI(this, argc, argv, gui);
  78         lyxerr[Debug::INIT] << "Initializing LyXGUI...done" << endl;
  79
  80         // Initialization of LyX (reads lyxrc and more)
  81         lyxerr[Debug::INIT] << "Initializing LyX::init..." << endl;
  82         init(argc, argv, gui);
  83         lyxerr[Debug::INIT] << "Initializing LyX::init...done" << endl;
  84
  85         lyxGUI->init();
  86
  87         // Load the files specified in the command line.
  88         // Now the GUI and LyX have taken care of their arguments, so
  89         // the only thing left on the command line should be
  90         // filenames.
  91         if ((*argc) == 2)
  92                 lyxerr[Debug::INFO] << "Opening document..." << endl;
  93         else if ((*argc) > 2)
  94                 lyxerr[Debug::INFO] << "Opening documents..." << endl;
  95
  96         Buffer * last_loaded = 0;
  97
  98         for (int argi = (*argc) - 1; argi >= 1; --argi) {
  99                 Buffer * loadb = bufferlist.loadLyXFile(argv[argi]);
 100                 if (loadb != 0) {
 101                         last_loaded = loadb;
 102                 }
 103         }
 104
 105         if (first_start) {
 106                 string splash = i18nLibFileSearch("examples", "splash.lyx");
 107                 lyxerr.debug() << "Opening splash document "
 108                                << splash << "..." << endl;
 109                 Buffer * loadb = bufferlist.loadLyXFile(splash);
 110                 if (loadb != 0) {
 111                         last_loaded = loadb;
 112                 }
 113         }
 114
 115         if (last_loaded != 0) {
 116                 lyxerr.debug() << "Yes we loaded some files." << endl;
 117                 if (lyxrc.use_gui)
 118                         lyxGUI->regBuf(last_loaded);
 119         }
 120
 121         // Execute batch commands if available
 122         if (!batch_command.empty()) {
 123                 lyxerr << "About to handle -x '" << batch_command << "'" << endl;
 124
 125                 // no buffer loaded, create one
 126                 if (!last_loaded)
 127                         last_loaded = bufferlist.newFile("tmpfile", string());
 128
 129                 // try to dispatch to last loaded buffer first
 130                 bool dispatched = last_loaded->Dispatch(batch_command);
 131
 132                 // if this was successful, return.
 133                 // Maybe we could do something more clever than aborting...
 134                 if (dispatched) {
 135                         lyxerr << "We are done!" << endl;
 136                         return;
 137                 }
 138
 139                 // otherwise, let the GUI handle the batch command
 140                 lyxGUI->regBuf(last_loaded);
 141                 lyxGUI->getLyXView()->getLyXFunc()->Dispatch(batch_command);
 142
 143                 // fall through...
 144         }
 145
 146         // Let the ball begin...
 147         lyxGUI->runTime();
 148 }
 149
 150
 151 // A destructor is always necessary  (asierra-970604)
 152 LyX::~LyX()
 153 {
 154         delete lastfiles;
 155         delete lyxGUI;
 156 }
 157
 158
 159 extern "C" void error_handler(int err_sig);
 160
 161 void LyX::init(int */*argc*/, char **argv, bool gui)
 162 {
 163         // Install the signal handlers
 164         signal(SIGHUP, error_handler);
 165         signal(SIGFPE, error_handler);
 166         signal(SIGSEGV, error_handler);
 167         signal(SIGINT, error_handler);
 168         signal(SIGTERM, error_handler);
 169
 170         //
 171         // Determine path of binary
 172         //
 173
 174         string fullbinpath;
 175         string binpath = subst(argv[0], '\\', '/');
 176         string binname = OnlyFilename(argv[0]);
 177         // Sorry for system specific code. (SMiyata)
 178         if (suffixIs(binname, ".exe"))
 179                 binname.erase(binname.length()-4, string::npos);
 180
 181         binpath = ExpandPath(binpath); // This expands ./ and ~/
 182
 183         if (!AbsolutePath(binpath)) {
 184                 string binsearchpath = GetEnvPath("PATH");
 185                 // This will make "src/lyx" work always :-)
 186                 binsearchpath += ";.";
 187                 binpath = FileOpenSearch(binsearchpath, argv[0]);
 188         }
 189
 190         fullbinpath = binpath;
 191         binpath = MakeAbsPath(OnlyPath(binpath));
 192
 193         // In case we are running in place and compiled with shared libraries
 194         if (suffixIs(binpath, "/.libs/"))
 195                 binpath.erase(binpath.length()-6, string::npos);
 196
 197         if (binpath.empty()) {
 198                 lyxerr << _("Warning: could not determine path of binary.")
 199                        << "\n"
 200                        << _("If you have problems, try starting LyX with an absolute path.")
 201                        << endl;
 202         }
 203         lyxerr[Debug::INIT] << "Path of binary: " << binpath << endl;
 204
 205         //
 206         // Determine system directory.
 207         //
 208
 209         // Directories are searched in this order:
 210         // 1) -sysdir command line parameter
 211         // 2) LYX_DIR_11x environment variable
 212         // 3) Maybe <path of binary>/TOP_SRCDIR/lib
 213         // 4) <path of binary>/../share/<name of binary>/
 214         // 4a) repeat 4 after following the Symlink if <path of
 215         //     binary> is a symbolic link.
 216         // 5) hardcoded lyx_dir
 217         // The directory is checked for the presence of the file
 218         // "chkconfig.ltx", and if that is present, the directory
 219         // is accepted as the system directory.
 220         // If no chkconfig.ltx file is found, a warning is given,
 221         // and the hardcoded lyx_dir is used.
 222
 223         // If we had a command line switch, system_lyxdir is already set
 224         string searchpath;
 225         if (!system_lyxdir.empty())
 226                 searchpath= MakeAbsPath(system_lyxdir) + ';';
 227
 228         // LYX_DIR_11x environment variable
 229         string lyxdir = GetEnvPath("LYX_DIR_11x");
 230
 231         if (!lyxdir.empty()) {
 232                 lyxerr[Debug::INIT] << "LYX_DIR_11x: " << lyxdir << endl;
 233                 searchpath += lyxdir + ';';
 234         }
 235
 236         // <path of binary>/TOP_SRCDIR/lib
 237         build_lyxdir = MakeAbsPath("../lib", binpath);
 238         if (!FileSearch(build_lyxdir, "lyxrc.defaults").empty()) {
 239                 searchpath += MakeAbsPath(AddPath(TOP_SRCDIR, "lib"),
 240                                           binpath) + ';';
 241                 lyxerr[Debug::INIT] << "Checking whether LyX is run in "
 242                         "place... yes" << endl;
 243         } else {
 244                 lyxerr[Debug::INIT]
 245                         << "Checking whether LyX is run in place... no"
 246                         << endl;
 247                 build_lyxdir.erase();
 248         }
 249
 250         bool FollowLink;
 251         do {
 252           // Path of binary/../share/name of binary/
 253                 searchpath += NormalizePath(AddPath(binpath, "../share/") +
 254                       OnlyFilename(binname)) + ';';
 255
 256           // Follow Symlinks
 257                 FileInfo file(fullbinpath, true);
 258                 FollowLink = file.isLink();
 259                 if (FollowLink) {
 260                         string Link;
 261                         if (LyXReadLink(fullbinpath, Link)) {
 262                                 fullbinpath = Link;
 263                                 binpath = MakeAbsPath(OnlyPath(fullbinpath));
 264                         }
 265                         else {
 266                                 FollowLink = false;
 267                         }
 268                 }
 269         } while (FollowLink);
 270
 271         // Hardcoded dir
 272         searchpath += LYX_DIR;
 273
 274         // If debugging, show complete search path
 275         lyxerr[Debug::INIT] << "System directory search path: "
 276                             << searchpath << endl;
 277
 278         string const filename = "chkconfig.ltx";
 279         string temp = FileOpenSearch(searchpath, filename, string());
 280         system_lyxdir = OnlyPath(temp);
 281
 282         // Reduce "path/../path" stuff out of system directory
 283         system_lyxdir = NormalizePath(system_lyxdir);
 284
 285         bool path_shown = false;
 286
 287         // Warn if environment variable is set, but unusable
 288         if (!lyxdir.empty()) {
 289                 if (system_lyxdir != NormalizePath(lyxdir)) {
 290                         lyxerr <<_("LYX_DIR_11x environment variable no good.")
 291                                << '\n'
 292                                << _("System directory set to: ")
 293                                << system_lyxdir << endl;
 294                         path_shown = true;
 295                 }
 296         }
 297
 298         // Warn the user if we couldn't find "chkconfig.ltx"
 299         if (system_lyxdir == "./") {
 300                 lyxerr <<_("LyX Warning! Couldn't determine system directory.")
 301                        <<_("Try the '-sysdir' command line parameter or")
 302                        <<_("set the environment variable LYX_DIR_11x to the "
 303                            "LyX system directory")
 304                        << _("containing the file `chkconfig.ltx'.") << endl;
 305                 if (!path_shown)
 306                         lyxerr << _("Using built-in default ")
 307                                << LYX_DIR << _(" but expect problems.")
 308                                << endl;
 309                 else
 310                         lyxerr << _("Expect problems.") << endl;
 311                 system_lyxdir = LYX_DIR;
 312                 path_shown = true;
 313         }
 314
 315         // Report the system directory if debugging is on
 316         if (!path_shown)
 317                 lyxerr[Debug::INIT] << "System directory: '"
 318                                     << system_lyxdir << '\'' << endl;
 319
 320         //
 321         // Determine user lyx-dir
 322         //
 323
 324         user_lyxdir = AddPath(GetEnvPath("HOME"), string(".") + PACKAGE);
 325         lyxerr[Debug::INIT] << "User LyX directory: '"
 326                             <<  user_lyxdir << '\'' << endl;
 327
 328         // Check that user LyX directory is ok.
 329         queryUserLyXDir();
 330
 331         //
 332         // Load the layouts first
 333         //
 334
 335         lyxerr[Debug::INIT] << "Reading layouts..." << endl;
 336         LyXSetStyle();
 337
 338         //
 339         // Shine up lyxrc defaults
 340         //
 341
 342         // Default template path: system_dir/templates
 343         if (lyxrc.template_path.empty()){
 344                 lyxrc.template_path = AddPath(system_lyxdir, "templates");
 345         }
 346
 347         // Default lastfiles file: $HOME/.lyx/lastfiles
 348         if (lyxrc.lastfiles.empty()){
 349                 lyxrc.lastfiles = AddName(user_lyxdir, "lastfiles");
 350         }
 351
 352         // Disable gui when either lyxrc or easyparse says so
 353         if (!gui)
 354                 lyxrc.use_gui = false;
 355
 356         // Calculate screen dpi as average of x-DPI and y-DPI:
 357         if (lyxrc.use_gui) {
 358                 lyxrc.dpi = getScreenDPI();
 359                 lyxerr[Debug::INFO] << "DPI setting detected to be "
 360                                                 << lyxrc.dpi + 0.5 << endl;
 361         } else {
 362                 lyxrc.dpi = 1; // I hope this is safe
 363         }
 364
 365         //
 366         // Read configuration files
 367         //
 368
 369         ReadRcFile("lyxrc.defaults");
 370         ReadRcFile("lyxrc");
 371
 372         // Ensure that we have really read a bind file, so that LyX is
 373         // usable.
 374         if (!lyxrc.hasBindFile)
 375                 lyxrc.ReadBindFile();
 376
 377
 378         // Bind the X dead keys to the corresponding LyX functions if
 379         // necessary.
 380         if (lyxrc.override_x_deadkeys)
 381                 deadKeyBindings(toplevel_keymap);
 382
 383         if (lyxerr.debugging(Debug::LYXRC)) {
 384                 lyxrc.print();
 385         }
 386
 387         // Create temp directory
 388         system_tempdir = CreateLyXTmpDir(lyxrc.tempdir_path);
 389         if (lyxerr.debugging(Debug::INIT)) {
 390                 lyxerr << "LyX tmp dir: `" << system_tempdir << '\'' << endl;
 391         }
 392
 393         // load the lastfiles mini-database
 394         lyxerr[Debug::INIT] << "Reading lastfiles `"
 395                             << lyxrc.lastfiles << "'..." << endl;
 396         lastfiles = new LastFiles(lyxrc.lastfiles,
 397                                   lyxrc.check_lastfiles,
 398                                   lyxrc.num_lastfiles);
 399
 400         // start up the lyxserver. (is this a bit early?) (Lgb)
 401         // 0.12 this will be way to early, we need the GUI to be initialized
 402         // first, so move it for now.
 403         // lyxserver = new LyXServer;
 404 }
 405
 406 // These are the default bindings known to LyX
 407 void LyX::defaultKeyBindings(kb_keymap  * kbmap)
 408 {
 409         kbmap->bind("Right", LFUN_RIGHT);
 410         kbmap->bind("Left", LFUN_LEFT);
 411         kbmap->bind("Up", LFUN_UP);
 412         kbmap->bind("Down", LFUN_DOWN);
 413
 414         kbmap->bind("Tab", LFUN_TAB);
 415
 416         kbmap->bind("Home", LFUN_HOME);
 417         kbmap->bind("End", LFUN_END);
 418         kbmap->bind("Prior", LFUN_PRIOR);
 419         kbmap->bind("Next", LFUN_NEXT);
 420
 421         kbmap->bind("Return", LFUN_BREAKPARAGRAPH);
 422         kbmap->bind("~C-~S-~M-nobreakspace", LFUN_PROTECTEDSPACE);
 423
 424         kbmap->bind("Delete", LFUN_DELETE);
 425         kbmap->bind("BackSpace", LFUN_BACKSPACE);
 426
 427         // kbmap->bindings to enable the use of the numeric keypad
 428         // e.g. Num Lock set
 429         kbmap->bind("KP_0", LFUN_SELFINSERT);
 430         kbmap->bind("KP_Decimal", LFUN_SELFINSERT);
 431         kbmap->bind("KP_Enter", LFUN_SELFINSERT);
 432         kbmap->bind("KP_1", LFUN_SELFINSERT);
 433         kbmap->bind("KP_2", LFUN_SELFINSERT);
 434         kbmap->bind("KP_3", LFUN_SELFINSERT);
 435         kbmap->bind("KP_4", LFUN_SELFINSERT);
 436         kbmap->bind("KP_5", LFUN_SELFINSERT);
 437         kbmap->bind("KP_6", LFUN_SELFINSERT);
 438         kbmap->bind("KP_Add", LFUN_SELFINSERT);
 439         kbmap->bind("KP_7", LFUN_SELFINSERT);
 440         kbmap->bind("KP_8", LFUN_SELFINSERT);
 441         kbmap->bind("KP_9", LFUN_SELFINSERT);
 442         kbmap->bind("KP_Divide", LFUN_SELFINSERT);
 443         kbmap->bind("KP_Multiply", LFUN_SELFINSERT);
 444         kbmap->bind("KP_Subtract", LFUN_SELFINSERT);
 445
 446         /* Most self-insert keys are handled in the 'default:' section of
 447          * WorkAreaKeyPress - so we don't have to define them all.
 448          * However keys explicit decleared as self-insert are
 449          * handled seperatly (LFUN_SELFINSERT.) Lgb. */
 450
 451         kbmap->bind("C-Tab", LFUN_TABINSERT);  // ale970515
 452         kbmap->bind("S-Tab", LFUN_SHIFT_TAB);  // jug20000522
 453 }
 454
 455 // LyX can optionally take over the handling of deadkeys
 456 void LyX::deadKeyBindings(kb_keymap * kbmap)
 457 {
 458         // bindKeyings for transparent handling of deadkeys
 459         // The keysyms are gotten from XFree86 X11R6
 460         kbmap->bind("~C-~S-~M-dead_acute", LFUN_ACUTE);
 461         kbmap->bind("~C-~S-~M-dead_breve", LFUN_BREVE);
 462         kbmap->bind("~C-~S-~M-dead_caron", LFUN_CARON);
 463         kbmap->bind("~C-~S-~M-dead_cedilla", LFUN_CEDILLA);
 464         kbmap->bind("~C-~S-~M-dead_abovering", LFUN_CIRCLE);
 465         kbmap->bind("~C-~S-~M-dead_circumflex", LFUN_CIRCUMFLEX);
 466         kbmap->bind("~C-~S-~M-dead_abovedot", LFUN_DOT);
 467         kbmap->bind("~C-~S-~M-dead_grave", LFUN_GRAVE);
 468         kbmap->bind("~C-~S-~M-dead_doubleacute", LFUN_HUNG_UMLAUT);
 469         kbmap->bind("~C-~S-~M-dead_macron", LFUN_MACRON);
 470         // nothing with this name
 471         // kbmap->bind("~C-~S-~M-dead_special_caron", LFUN_SPECIAL_CARON);
 472         kbmap->bind("~C-~S-~M-dead_tilde", LFUN_TILDE);
 473         kbmap->bind("~C-~S-~M-dead_diaeresis", LFUN_UMLAUT);
 474         // nothing with this name either...
 475         //kbmap->bind("~C-~S-~M-dead_underbar", LFUN_UNDERBAR);
 476         kbmap->bind("~C-~S-~M-dead_belowdot", LFUN_UNDERDOT);
 477         kbmap->bind("~C-~S-~M-dead_tie", LFUN_TIE);
 478         kbmap->bind("~C-~S-~M-dead_ogonek", LFUN_OGONEK);
 479 }
 480
 481
 482
 483 // This one is not allowed to use anything on the main form, since that
 484 // one does not exist yet. (Asger)
 485 void LyX::queryUserLyXDir()
 486 {
 487         // Does user directory exist?
 488         FileInfo fileInfo(user_lyxdir);
 489         if (fileInfo.isOK() && fileInfo.isDir()) {
 490                 first_start = false;
 491                 return;
 492         } else {
 493                 first_start = true;
 494         }
 495
 496         // Nope
 497         if (!AskQuestion(_("You don't have a personal LyX directory."),
 498                          _("It is needed to keep your own configuration."),
 499                          _("Should I try to set it up for you (recommended)?"))) {
 500                 lyxerr << _("Running without personal LyX directory.") << endl;
 501                 // No, let's use $HOME instead.
 502                 user_lyxdir = GetEnvPath("HOME");
 503                 return;
 504         }
 505
 506         // Tell the user what is going on
 507         lyxerr << _("LyX: Creating directory ") << user_lyxdir
 508                << _(" and running configure...") << endl;
 509
 510         // Create directory structure
 511         if (!createDirectory(user_lyxdir, 0755)) {
 512                 // Failed, let's use $HOME instead.
 513                 user_lyxdir = GetEnvPath("HOME");
 514                 lyxerr << _("Failed. Will use ") << user_lyxdir
 515                        << _(" instead.") << endl;
 516                 return;
 517         }
 518
 519         // Run configure in user lyx directory
 520         Path p(user_lyxdir);
 521         system(AddName(system_lyxdir, "configure").c_str());
 522         lyxerr << "LyX: " << _("Done!") << endl;
 523 }
 524
 525
 526 // Read the rc file `name'
 527 void LyX::ReadRcFile(string const & name)
 528 {
 529         lyxerr[Debug::INIT] << "About to read " << name << "..." << endl;
 530
 531         string lyxrc_path = LibFileSearch(string(), name);
 532         if (!lyxrc_path.empty()){
 533                 lyxerr[Debug::INIT] << "Found " << name
 534                                     << " in " << lyxrc_path << endl;
 535                 if (lyxrc.read(lyxrc_path) < 0) {
 536                         WriteAlert(_("LyX Warning!"),
 537                                    _("Error while reading ")+lyxrc_path+".",
 538                                    _("Using built-in defaults."));
 539                 }
 540         } else
 541                 lyxerr[Debug::INIT] << "Could not find " << name << endl;
 542 }
 543
 544
 545 // Set debugging level and report result to user
 546 void setDebuggingLevel(string const & dbgLevel)
 547 {
 548         lyxerr << _("Setting debug level to ") <<  dbgLevel << endl;
 549         lyxerr.level(Debug::value(dbgLevel));
 550         Debug::showLevel(lyxerr, lyxerr.level());
 551 }
 552
 553
 554 // Give command line help
 555 void commandLineHelp()
 556 {
 557         lyxerr << "LyX " LYX_VERSION << " of " LYX_RELEASE << endl;
 558         lyxerr <<
 559                 _("Usage: lyx [ command line switches ] [ name.lyx ... ]\n"
 560                   "Command line switches (case sensitive):\n"
 561                   "\t-help           summarize LyX usage\n"
 562                   "\t-sysdir x       try to set system directory to x\n"
 563                   "\t-width x        set the width of the main window\n"
 564                   "\t-height y       set the height of the main window\n"
 565                   "\t-xpos x         set the x position of the main window\n"
 566                   "\t-ypos y         set the y position of the main window\n"
 567                   "\t-dbg feature[,feature]...\n"
 568                   "                  select the features to debug.\n"
 569                   "                  Type `lyx -dbg' to see the list of features\n"
 570                   "Check the LyX man page for more options.") << endl;
 571 }
 572
 573
 574 bool LyX::easyParse(int * argc, char * argv[])
 575 {
 576         bool gui = true;
 577         for(int i = 1; i < *argc; ++i) {
 578                 string arg = argv[i];
 579
 580                 // Check for -dbg int
 581                 if (arg == "-dbg") {
 582                         if (i + 1 < *argc) {
 583                                 setDebuggingLevel(argv[i + 1]);
 584
 585                                 // Now, remove these two arguments by shifting
 586                                 // the following two places down.
 587                                 (*argc) -= 2;
 588                                 for (int j = i; j < (*argc); ++j)
 589                                         argv[j] = argv[j + 2];
 590                                 --i; // After shift, check this number again.
 591                         } else {
 592                                 lyxerr << _("List of supported debug flags:")
 593                                        << endl;
 594                                 Debug::showTags(lyxerr);
 595                                 exit(0);
 596                         }
 597                 }
 598                 // Check for "-sysdir"
 599                 else if (arg == "-sysdir") {
 600                         if (i + 1 < *argc) {
 601                                 system_lyxdir = argv[i + 1];
 602
 603                                 // Now, remove these two arguments by shifting
 604                                 // the following two places down.
 605                                 (*argc) -= 2;
 606                                 for (int j= i; j < (*argc); ++j)
 607                                         argv[j] = argv[j + 2];
 608                                 --i; // After shift, check this number again.
 609                         } else
 610                                 lyxerr << _("Missing directory for -sysdir switch!")
 611                                        << endl;
 612                 // Check for --help or -help
 613                 } else if (arg == "--help" || arg == "-help") {
 614                         commandLineHelp();
 615                         exit(0);
 616                 }
 617                 // Check for "-nw": No XWindows as for emacs this should
 618                 // give a LyX that could be used in a terminal window.
 619                 //else if (arg == "-nw") {
 620                 //      gui = false;
 621                 //}
 622
 623                 // Check for "-x": Execute commands
 624                 else if (arg == "-x" || arg == "--execute") {
 625                         if (i + 1 < *argc) {
 626                                 batch_command = string(argv[i + 1]);
 627
 628                                 // Now, remove these two arguments by shifting
 629                                 // the following two places down.
 630                                 (*argc) -= 2;
 631                                 for (int j = i; j < (*argc); ++j)
 632                                         argv[j] = argv[j + 2];
 633                                 --i; // After shift, check this number again.
 634
 635                         }
 636                         else
 637                                 lyxerr << _("Missing command string after  -x switch!") << endl;
 638
 639                         // Argh. Setting gui to false segfaults..
 640                         //gui = false;
 641                 }
 642
 643                 else if (arg == "-e" || arg == "--export") {
 644                         if (i + 1 < *argc) {
 645                                 string type(argv[i+1]);
 646
 647                                 (*argc) -= 2;
 648                                 for (int j = i; j < (*argc); ++j)
 649                                         argv[j] = argv[j + 2];
 650                                 --i; // After shift, check this number again.
 651
 652                                 if (type == "tex")
 653                                         type = "latex";
 654                                 else if (type == "ps")
 655                                         type = "postscript";
 656                                 else if (type == "text" || type == "txt")
 657                                         type = "ascii";
 658
 659                                 if (type == "latex" || type == "postscript"
 660                                     || type == "ascii" || type == "html")
 661                                         batch_command = "buffer-export " + type;
 662                                 else
 663                                         lyxerr << _("Unknown file type '")
 664                                                << type << _("' after ")
 665                                                << arg << _(" switch!") << endl;
 666                         } else
 667                                 lyxerr << _("Missing file type [eg latex, "
 668                                             "ps...] after ")
 669                                        << arg << _(" switch!") << endl;
 670                 }
 671
 672                 else if (arg == "--import") {
 673                         if (i + 1 < *argc) {
 674                                 string type(argv[i+1]);
 675                                 string file(argv[i+2]);
 676
 677                                 (*argc) -= 3;
 678                                 for (int j = i; j < (*argc); ++j)
 679                                         argv[j] = argv[j + 3];
 680                                 --i; // After shift, check this number again.
 681
 682                                 batch_command = "buffer-import " + type + " " + file;
 683                                 lyxerr << "batch_command: "
 684                                        << batch_command << endl;
 685
 686                         } else
 687                                 lyxerr << _("Missing type [eg latex, "
 688                                             "ps...] after ")
 689                                        << arg << _(" switch!") << endl;
 690                 }
 691         }
 692
 693         return gui;
 694 }
 695
 696
 697 extern "C"
 698 void error_handler(int err_sig)
 699 {
 700         switch (err_sig) {
 701         case SIGHUP:
 702                 lyxerr << "\nlyx: SIGHUP signal caught" << endl;
 703                 break;
 704         case SIGINT:
 705                 // no comments
 706                 break;
 707         case SIGFPE:
 708                 lyxerr << "\nlyx: SIGFPE signal caught" << endl;
 709                 break;
 710         case SIGSEGV:
 711                 lyxerr << "\nlyx: SIGSEGV signal caught" << endl;
 712                 lyxerr <<
 713                         "Sorry, you have found a bug in LyX."
 714                         " If possible, please read 'Known bugs'\n"
 715                         "under the Help menu and then send us "
 716                         "a full bug report. Thanks!" << endl;
 717                 break;
 718         case SIGTERM:
 719                 // no comments
 720                 break;
 721         }
 722
 723         // Deinstall the signal handlers
 724         signal(SIGHUP, SIG_DFL);
 725         signal(SIGINT, SIG_DFL);
 726         signal(SIGFPE, SIG_DFL);
 727         signal(SIGSEGV, SIG_DFL);
 728         signal(SIGTERM, SIG_DFL);
 729
 730         bufferlist.emergencyWriteAll();
 731
 732         lyxerr << "Bye." << endl;
 733         if(err_sig!= SIGHUP && (!GetEnv("LYXDEBUG").empty() || err_sig == SIGSEGV))
 734                 lyx::abort();
 735         exit(0);
 736 }