src/args.c

   1 /*
   2    Handle command line arguments.
   3
   4    Copyright (C) 2009, 2011
   5    The Free Software Foundation, Inc.
   6
   7    Written by:
   8    Slava Zanko <slavazanko@gmail.com>, 2009.
   9
  10    This file is part of the Midnight Commander.
  11
  12    The Midnight Commander is free software: you can redistribute it
  13    and/or modify it under the terms of the GNU General Public License as
  14    published by the Free Software Foundation, either version 3 of the License,
  15    or (at your option) any later version.
  16
  17    The Midnight Commander is distributed in the hope that it will be useful,
  18    but WITHOUT ANY WARRANTY; without even the implied warranty of
  19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20    GNU General Public License for more details.
  21
  22    You should have received a copy of the GNU General Public License
  23    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  24  */
  25
  26 #include <config.h>
  27 #include <stdlib.h>
  28 #include <stdio.h>
  29
  30 #include "lib/global.h"
  31 #include "lib/tty/tty.h"
  32 #include "lib/strutil.h"
  33 #include "lib/vfs/vfs.h"
  34 #include "lib/util.h"           /* x_basename() */
  35
  36 #ifdef ENABLE_VFS_SMB
  37 #include "src/vfs/smbfs/smbfs.h"        /* smbfs_set_debugf()  */
  38 #endif
  39
  40 #include "src/main.h"
  41 #include "src/textconf.h"
  42
  43 #include "src/args.h"
  44
  45 /*** external variables **************************************************************************/
  46
  47 /*** global variables ****************************************************************************/
  48
  49 /* If true, show version info and exit */
  50 gboolean mc_args__show_version = FALSE;
  51
  52 /* If true, assume we are running on an xterm terminal */
  53 gboolean mc_args__force_xterm = FALSE;
  54
  55 gboolean mc_args__nomouse = FALSE;
  56
  57 /* Force colors, only used by Slang */
  58 gboolean mc_args__force_colors = FALSE;
  59
  60 /* Don't load keymap form file and use default one */
  61 gboolean mc_args__nokeymap = FALSE;
  62
  63 /* Line to start the editor on */
  64 int mc_args__edit_start_line = 0;
  65
  66 char *mc_args__last_wd_file = NULL;
  67
  68 /* when enabled NETCODE, use folowing file as logfile */
  69 char *mc_args__netfs_logfile = NULL;
  70
  71 /* keymap file */
  72 char *mc_args__keymap_file = NULL;
  73
  74 /* Debug level */
  75 int mc_args__debug_level = 0;
  76
  77 /*** file scope macro definitions ****************************************************************/
  78
  79 /*** file scope type declarations ****************************************************************/
  80
  81 /*** file scope variables ************************************************************************/
  82
  83 /* forward declarations */
  84 static gboolean parse_mc_e_argument (const gchar * option_name, const gchar * value,
  85                                      gpointer data, GError ** error);
  86 static gboolean parse_mc_v_argument (const gchar * option_name, const gchar * value,
  87                                      gpointer data, GError ** error);
  88
  89 static GOptionContext *context;
  90
  91 #ifdef HAVE_SUBSHELL_SUPPORT
  92 static gboolean mc_args__nouse_subshell = FALSE;
  93 #endif /* HAVE_SUBSHELL_SUPPORT */
  94 static gboolean mc_args__show_datadirs = FALSE;
  95 static gboolean mc_args__show_datadirs_extended = FALSE;
  96 static gboolean mc_args__show_configure_opts = FALSE;
  97
  98 static GOptionGroup *main_group;
  99
 100 static const GOptionEntry argument_main_table[] = {
 101     /* *INDENT-OFF* */
 102     /* generic options */
 103     {
 104      "version", 'V', G_OPTION_FLAG_IN_MAIN, G_OPTION_ARG_NONE,
 105      &mc_args__show_version,
 106      N_("Displays the current version"),
 107      NULL
 108     },
 109
 110     /* options for wrappers */
 111     {
 112      "datadir", 'f', G_OPTION_FLAG_IN_MAIN, G_OPTION_ARG_NONE,
 113      &mc_args__show_datadirs,
 114      N_("Print data directory"),
 115      NULL
 116     },
 117
 118     /* show extended information about used data directories */
 119     {
 120      "datadir-info", 'F', G_OPTION_FLAG_IN_MAIN, G_OPTION_ARG_NONE,
 121      &mc_args__show_datadirs_extended,
 122      N_("Print extended info about used data directories"),
 123      NULL
 124     },
 125
 126     /* show configure options */
 127     {
 128      "configure-options", '\0', G_OPTION_FLAG_IN_MAIN, G_OPTION_ARG_NONE,
 129      &mc_args__show_configure_opts,
 130      N_("Print configure options"),
 131      NULL
 132     },
 133
 134     {
 135      "printwd", 'P', G_OPTION_FLAG_IN_MAIN, G_OPTION_ARG_STRING,
 136      &mc_args__last_wd_file,
 137      N_("Print last working directory to specified file"),
 138      "<file>"
 139     },
 140
 141 #ifdef HAVE_SUBSHELL_SUPPORT
 142     {
 143      "subshell", 'U', G_OPTION_FLAG_IN_MAIN, G_OPTION_ARG_NONE,
 144      &mc_global.tty.use_subshell,
 145      N_("Enables subshell support (default)"),
 146      NULL
 147     },
 148
 149     {
 150      "nosubshell", 'u', G_OPTION_FLAG_IN_MAIN, G_OPTION_ARG_NONE,
 151      &mc_args__nouse_subshell,
 152      N_("Disables subshell support"),
 153      NULL
 154     },
 155 #endif
 156
 157     /* debug options */
 158 #ifdef ENABLE_VFS_FTP
 159     {
 160      "ftplog", 'l', G_OPTION_FLAG_IN_MAIN, G_OPTION_ARG_STRING,
 161      &mc_args__netfs_logfile,
 162      N_("Log ftp dialog to specified file"),
 163      "<file>"
 164     },
 165 #endif /* ENABLE_VFS_FTP */
 166 #ifdef ENABLE_VFS_SMB
 167     {
 168      "debuglevel", 'D', G_OPTION_FLAG_IN_MAIN, G_OPTION_ARG_INT,
 169      &mc_args__debug_level,
 170      N_("Set debug level"),
 171      "<integer>"
 172     },
 173 #endif /* ENABLE_VFS_SMB */
 174
 175     /* single file operations */
 176     {
 177      "view", 'v', G_OPTION_FLAG_IN_MAIN, G_OPTION_ARG_CALLBACK,
 178      parse_mc_v_argument,
 179      N_("Launches the file viewer on a file"),
 180      "<file>"
 181     },
 182
 183     {
 184      "edit", 'e', G_OPTION_FLAG_IN_MAIN, G_OPTION_ARG_CALLBACK,
 185      parse_mc_e_argument,
 186      N_("Edits one file"),
 187      "<file>"},
 188
 189     {
 190      NULL, '\0', 0, 0, NULL, NULL, NULL /* Complete struct initialization */
 191     }
 192     /* *INDENT-ON* */
 193 };
 194
 195 GOptionGroup *terminal_group;
 196 #define ARGS_TERM_OPTIONS 0
 197 static const GOptionEntry argument_terminal_table[] = {
 198     /* *INDENT-OFF* */
 199     /* terminal options */
 200     {
 201      "xterm", 'x', ARGS_TERM_OPTIONS, G_OPTION_ARG_NONE,
 202      &mc_args__force_xterm,
 203      N_("Forces xterm features"),
 204      NULL
 205     },
 206
 207     {
 208      "no-x11", 'X', ARGS_TERM_OPTIONS, G_OPTION_ARG_NONE,
 209      &mc_global.tty.disable_x11,
 210      N_("Disable X11 support"),
 211      NULL
 212     },
 213
 214     {
 215      "oldmouse", 'g', ARGS_TERM_OPTIONS, G_OPTION_ARG_NONE,
 216      &mc_global.tty.old_mouse,
 217      N_("Tries to use an old highlight mouse tracking"),
 218      NULL
 219     },
 220
 221     {
 222      "nomouse", 'd', ARGS_TERM_OPTIONS, G_OPTION_ARG_NONE,
 223      &mc_args__nomouse,
 224      N_("Disable mouse support in text version"),
 225      NULL
 226     },
 227
 228 #ifdef HAVE_SLANG
 229     {
 230      "termcap", 't', ARGS_TERM_OPTIONS, G_OPTION_ARG_NONE,
 231      &SLtt_Try_Termcap,
 232      N_("Tries to use termcap instead of terminfo"),
 233      NULL
 234     },
 235 #endif
 236
 237     {
 238      "slow", 's', ARGS_TERM_OPTIONS, G_OPTION_ARG_NONE,
 239      &mc_global.tty.slow_terminal,
 240      N_("To run on slow terminals"),
 241      NULL
 242     },
 243
 244     {
 245      "stickchars", 'a', ARGS_TERM_OPTIONS, G_OPTION_ARG_NONE,
 246      &mc_global.tty.ugly_line_drawing,
 247      N_("Use stickchars to draw"),
 248      NULL
 249     },
 250
 251     {
 252      "resetsoft", 'k', ARGS_TERM_OPTIONS, G_OPTION_ARG_NONE,
 253      &reset_hp_softkeys,
 254      N_("Resets soft keys on HP terminals"),
 255      NULL
 256     },
 257
 258     {
 259      "keymap", 'K', ARGS_TERM_OPTIONS, G_OPTION_ARG_STRING,
 260      &mc_args__keymap_file,
 261      N_("Load definitions of key bindings from specified file"),
 262      "<file>"
 263     },
 264
 265     {
 266      "nokeymap", '\0', ARGS_TERM_OPTIONS, G_OPTION_ARG_NONE,
 267      &mc_args__nokeymap,
 268      N_("Don't load definitions of key bindings from file, use defaults"),
 269      NULL
 270     },
 271
 272     {
 273      NULL, '\0', 0, 0, NULL, NULL, NULL /* Complete struct initialization */
 274     }
 275     /* *INDENT-ON* */
 276 };
 277
 278 #undef ARGS_TERM_OPTIONS
 279
 280 GOptionGroup *color_group;
 281 #define ARGS_COLOR_OPTIONS 0
 282 /* #define ARGS_COLOR_OPTIONS G_OPTION_FLAG_IN_MAIN */
 283 static const GOptionEntry argument_color_table[] = {
 284     /* *INDENT-OFF* */
 285     /* color options */
 286     {
 287      "nocolor", 'b', ARGS_COLOR_OPTIONS, G_OPTION_ARG_NONE,
 288      &mc_global.tty.disable_colors,
 289      N_("Requests to run in black and white"),
 290      NULL
 291     },
 292
 293     {
 294      "color", 'c', ARGS_COLOR_OPTIONS, G_OPTION_ARG_NONE,
 295      &mc_args__force_colors,
 296      N_("Request to run in color mode"),
 297      NULL
 298     },
 299
 300     {
 301      "colors", 'C', ARGS_COLOR_OPTIONS, G_OPTION_ARG_STRING,
 302      &mc_global.tty.command_line_colors,
 303      N_("Specifies a color configuration"),
 304      "<string>"
 305     },
 306
 307     {
 308      "skin", 'S', ARGS_COLOR_OPTIONS, G_OPTION_ARG_STRING,
 309      &mc_global.tty.skin,
 310      N_("Show mc with specified skin"),
 311      "<string>"
 312     },
 313
 314     {
 315      NULL, '\0', 0, 0, NULL, NULL, NULL /* Complete struct initialization */
 316     }
 317     /* *INDENT-ON* */
 318 };
 319
 320 #undef ARGS_COLOR_OPTIONS
 321
 322 static gchar *mc_args__loc__colors_string = NULL;
 323 static gchar *mc_args__loc__footer_string = NULL;
 324 static gchar *mc_args__loc__header_string = NULL;
 325 static gchar *mc_args__loc__usage_string = NULL;
 326
 327 /*** file scope functions ************************************************************************/
 328
 329 /* --------------------------------------------------------------------------------------------- */
 330 static void
 331 mc_args_clean_temp_help_strings (void)
 332 {
 333     g_free (mc_args__loc__colors_string);
 334     mc_args__loc__colors_string = NULL;
 335
 336     g_free (mc_args__loc__footer_string);
 337     mc_args__loc__footer_string = NULL;
 338
 339     g_free (mc_args__loc__header_string);
 340     mc_args__loc__header_string = NULL;
 341
 342     g_free (mc_args__loc__usage_string);
 343     mc_args__loc__usage_string = NULL;
 344 }
 345
 346 /* --------------------------------------------------------------------------------------------- */
 347
 348 static GOptionGroup *
 349 mc_args_new_color_group (void)
 350 {
 351 /* *INDENT-OFF* */
 352     /* FIXME: to preserve translations, lines should be split. */
 353     mc_args__loc__colors_string = g_strdup_printf ("%s\n%s",
 354                                                    /* TRANSLATORS: don't translate keywords */
 355                                                    _("--colors KEYWORD={FORE},{BACK},{ATTR}:KEYWORD2=...\n\n"
 356                                                      "{FORE}, {BACK} and {ATTR} can be omitted, and the default will be used\n"
 357                                                      "\n Keywords:\n"
 358                                                      "   Global:       errors, disabled, reverse, gauge, header\n"
 359                                                      "                 input, inputmark, inputunchanged, commandlinemark\n"
 360                                                      "                 bbarhotkey, bbarbutton, statusbar\n"
 361                                                      "   File display: normal, selected, marked, markselect\n"
 362                                                      "   Dialog boxes: dnormal, dfocus, dhotnormal, dhotfocus, errdhotnormal,\n"
 363                                                      "                 errdhotfocus\n"
 364                                                      "   Menus:        menunormal, menuhot, menusel, menuhotsel, menuinactive\n"
 365                                                      "   Popup menus:  pmenunormal, pmenusel, pmenutitle\n"
 366                                                      "   Editor:       editnormal, editbold, editmarked, editwhitespace,\n"
 367                                                      "                 editlinestate\n"
 368                                                      "   Viewer:       viewbold, viewunderline, viewselected\n"
 369                                                      "   Help:         helpnormal, helpitalic, helpbold, helplink, helpslink\n"),
 370                                                    /* TRANSLATORS: don't translate color names and attributes */
 371                                                    _("Standard Colors:\n"
 372                                                     "   black, gray, red, brightred, green, brightgreen, brown,\n"
 373                                                     "   yellow, blue, brightblue, magenta, brightmagenta, cyan,\n"
 374                                                     "   brightcyan, lightgray and white\n\n"
 375                                                     "Extended colors, when 256 colors are available:\n"
 376                                                     "   color16 to color255, or rgb000 to rgb555 and gray0 to gray23\n\n"
 377                                                     "Attributes:\n"
 378                                                     "   bold, underline, reverse, blink; append more with '+'\n")
 379                                                     );
 380 /* *INDENT-ON* */
 381
 382     return g_option_group_new ("color", mc_args__loc__colors_string,
 383                                _("Color options"), NULL, NULL);
 384
 385 }
 386
 387 /* --------------------------------------------------------------------------------------------- */
 388
 389 static gchar *
 390 mc_args_add_usage_info (void)
 391 {
 392     mc_args__loc__usage_string = g_strdup_printf ("[%s] %s\n %s - %s\n",
 393                                                   _("+number"),
 394                                                   _("[this_dir] [other_panel_dir]"),
 395                                                   _("+number"),
 396                                                   _
 397                                                   ("Set initial line number for the internal editor"));
 398     return mc_args__loc__usage_string;
 399 }
 400
 401 /* --------------------------------------------------------------------------------------------- */
 402
 403 static void
 404 mc_args_add_extended_info_to_help (void)
 405 {
 406     mc_args__loc__footer_string = g_strdup_printf ("%s",
 407                                                    _
 408                                                    ("\n"
 409                                                     "Please send any bug reports (including the output of `mc -V')\n"
 410                                                     "as tickets at www.midnight-commander.org\n"));
 411     mc_args__loc__header_string = g_strdup_printf (_("GNU Midnight Commander %s\n"), VERSION);
 412
 413     g_option_context_set_description (context, mc_args__loc__footer_string);
 414     g_option_context_set_summary (context, mc_args__loc__header_string);
 415 }
 416
 417 /* --------------------------------------------------------------------------------------------- */
 418
 419 static gchar *
 420 mc_args__convert_help_to_syscharset (const gchar * charset, const gchar * error_message,
 421                                      const gchar * help_str)
 422 {
 423     GString *buffer;
 424     GIConv conv;
 425     gchar *full_help_str;
 426
 427     buffer = g_string_new ("");
 428     conv = g_iconv_open (charset, "UTF-8");
 429     full_help_str = g_strdup_printf ("%s\n\n%s\n", error_message, help_str);
 430
 431     str_convert (conv, full_help_str, buffer);
 432
 433     g_free (full_help_str);
 434     g_iconv_close (conv);
 435
 436     return g_string_free (buffer, FALSE);
 437 }
 438
 439 /* --------------------------------------------------------------------------------------------- */
 440
 441 static gboolean
 442 parse_mc_e_argument (const gchar * option_name, const gchar * value, gpointer data, GError ** error)
 443 {
 444     (void) option_name;
 445     (void) data;
 446     (void) error;
 447
 448     mc_global.mc_run_mode = MC_RUN_EDITOR;
 449     mc_run_param0 = g_strdup (value);
 450
 451     return TRUE;
 452 }
 453
 454 /* --------------------------------------------------------------------------------------------- */
 455
 456 static gboolean
 457 parse_mc_v_argument (const gchar * option_name, const gchar * value, gpointer data, GError ** error)
 458 {
 459     (void) option_name;
 460     (void) data;
 461     (void) error;
 462
 463     mc_global.mc_run_mode = MC_RUN_VIEWER;
 464     mc_run_param0 = g_strdup (value);
 465
 466     return TRUE;
 467 }
 468
 469 /* --------------------------------------------------------------------------------------------- */
 470 /*** public functions ****************************************************************************/
 471 /* --------------------------------------------------------------------------------------------- */
 472
 473 gboolean
 474 mc_args_parse (int *argc, char ***argv, const char *translation_domain, GError ** error)
 475 {
 476     const gchar *_system_codepage;
 477     gboolean ok = TRUE;
 478
 479     _system_codepage = str_detect_termencoding ();
 480
 481 #ifdef ENABLE_NLS
 482     if (!str_isutf8 (_system_codepage))
 483         bind_textdomain_codeset ("mc", "UTF-8");
 484 #endif
 485
 486     context = g_option_context_new (mc_args_add_usage_info ());
 487
 488     g_option_context_set_ignore_unknown_options (context, FALSE);
 489
 490     mc_args_add_extended_info_to_help ();
 491
 492     main_group = g_option_group_new ("main", _("Main options"), _("Main options"), NULL, NULL);
 493
 494     g_option_group_add_entries (main_group, argument_main_table);
 495     g_option_context_set_main_group (context, main_group);
 496     g_option_group_set_translation_domain (main_group, translation_domain);
 497
 498     terminal_group = g_option_group_new ("terminal", _("Terminal options"),
 499                                          _("Terminal options"), NULL, NULL);
 500
 501     g_option_group_add_entries (terminal_group, argument_terminal_table);
 502     g_option_context_add_group (context, terminal_group);
 503     g_option_group_set_translation_domain (terminal_group, translation_domain);
 504
 505     color_group = mc_args_new_color_group ();
 506
 507     g_option_group_add_entries (color_group, argument_color_table);
 508     g_option_context_add_group (context, color_group);
 509     g_option_group_set_translation_domain (color_group, translation_domain);
 510
 511     if (!g_option_context_parse (context, argc, argv, error))
 512     {
 513         GError *error2 = NULL;
 514
 515         if (*error == NULL)
 516             *error = g_error_new (MC_ERROR, 0, "%s\n", _("Arguments parse error!"));
 517         else
 518         {
 519             gchar *help_str;
 520
 521 #if GLIB_CHECK_VERSION(2,14,0)
 522             help_str = g_option_context_get_help (context, TRUE, NULL);
 523 #else
 524             help_str = g_strdup ("");
 525 #endif
 526             if (str_isutf8 (_system_codepage))
 527                 error2 = g_error_new ((*error)->domain, (*error)->code, "%s\n\n%s\n",
 528                                       (*error)->message, help_str);
 529             else
 530             {
 531                 gchar *full_help_str;
 532
 533                 full_help_str =
 534                     mc_args__convert_help_to_syscharset (_system_codepage, (*error)->message,
 535                                                          help_str);
 536                 error2 = g_error_new ((*error)->domain, (*error)->code, "%s", full_help_str);
 537                 g_free (full_help_str);
 538             }
 539
 540             g_free (help_str);
 541             g_error_free (*error);
 542             *error = error2;
 543         }
 544
 545         ok = FALSE;
 546     }
 547
 548     g_option_context_free (context);
 549     mc_args_clean_temp_help_strings ();
 550
 551 #ifdef ENABLE_NLS
 552     if (!str_isutf8 (_system_codepage))
 553         bind_textdomain_codeset ("mc", _system_codepage);
 554 #endif
 555
 556     return ok;
 557 }
 558
 559 /* --------------------------------------------------------------------------------------------- */
 560
 561 gboolean
 562 mc_args_show_info (void)
 563 {
 564     if (mc_args__show_version)
 565     {
 566         show_version ();
 567         return FALSE;
 568     }
 569
 570     if (mc_args__show_datadirs)
 571     {
 572         printf ("%s (%s)\n", mc_global.sysconfig_dir, mc_global.share_data_dir);
 573         return FALSE;
 574     }
 575
 576     if (mc_args__show_datadirs_extended)
 577     {
 578         show_datadirs_extended ();
 579         return FALSE;
 580     }
 581
 582     if (mc_args__show_configure_opts)
 583     {
 584         show_configure_options ();
 585         return FALSE;
 586     }
 587
 588     return TRUE;
 589 }
 590
 591 /* --------------------------------------------------------------------------------------------- */
 592
 593 gboolean
 594 mc_setup_by_args (int argc, char **argv, GError ** error)
 595 {
 596     const char *base;
 597     char *tmp;
 598
 599     if (mc_args__force_colors)
 600         mc_global.tty.disable_colors = FALSE;
 601
 602 #ifdef HAVE_SUBSHELL_SUPPORT
 603     if (mc_args__nouse_subshell)
 604         mc_global.tty.use_subshell = FALSE;
 605 #endif /* HAVE_SUBSHELL_SUPPORT */
 606
 607 #ifdef ENABLE_VFS_SMB
 608     if (mc_args__debug_level != 0)
 609         smbfs_set_debug (mc_args__debug_level);
 610 #endif /* ENABLE_VFS_SMB */
 611
 612 #if defined ENABLE_VFS_FTP || defined ENABLE_VFS_FTP
 613     if (mc_args__netfs_logfile != NULL)
 614     {
 615         vfs_path_t *vpath;
 616
 617 #ifdef ENABLE_VFS_FTP
 618         vpath = vfs_path_from_str ("ftp://");
 619         mc_setctl (vpath, VFS_SETCTL_LOGFILE, (void *) mc_args__netfs_logfile);
 620         vfs_path_free (vpath);
 621 #endif /* ENABLE_VFS_FTP */
 622 #ifdef ENABLE_VFS_SMB
 623         vpath = vfs_path_from_str ("smb://");
 624         mc_setctl (vpath, VFS_SETCTL_LOGFILE, (void *) mc_args__netfs_logfile);
 625         vfs_path_free (vpath);
 626 #endif /* ENABLE_VFS_SMB */
 627     }
 628 #endif /* ENABLE_VFS_FTP || ENABLE_VFS_SMB */
 629
 630     base = x_basename (argv[0]);
 631     tmp = (argc > 0) ? argv[1] : NULL;
 632
 633     if (strncmp (base, "mce", 3) == 0 || strcmp (base, "vi") == 0)
 634     {
 635         /* mce* or vi is link to mc */
 636
 637         mc_run_param0 = g_strdup ("");
 638         if (tmp != NULL)
 639         {
 640             /*
 641              * Check for filename:lineno, followed by an optional colon.
 642              * This format is used by many programs (especially compilers)
 643              * in error messages and warnings. It is supported so that
 644              * users can quickly copy and paste file locations.
 645              */
 646             char *end, *p;
 647
 648             end = tmp + strlen (tmp);
 649             p = end;
 650
 651             if (p > tmp && p[-1] == ':')
 652                 p--;
 653             while (p > tmp && g_ascii_isdigit ((gchar) p[-1]))
 654                 p--;
 655             if (tmp < p && p < end && p[-1] == ':')
 656             {
 657                 char *fname;
 658                 struct stat st;
 659                 vfs_path_t *tmp_vpath, *fname_vpath;
 660                 gboolean ok;
 661
 662                 fname = g_strndup (tmp, p - 1 - tmp);
 663                 tmp_vpath = vfs_path_from_str (tmp);
 664                 fname_vpath = vfs_path_from_str (fname);
 665                 /*
 666                  * Check that the file before the colon actually exists.
 667                  * If it doesn't exist, revert to the old behavior.
 668                  */
 669                 ok = mc_stat (tmp_vpath, &st) == -1 && mc_stat (fname_vpath, &st) != -1;
 670                 vfs_path_free (tmp_vpath);
 671                 vfs_path_free (fname_vpath);
 672
 673                 if (ok)
 674                 {
 675                     mc_run_param0 = fname;
 676                     mc_args__edit_start_line = atoi (p);
 677                 }
 678                 else
 679                 {
 680                     g_free (fname);
 681                     goto try_plus_filename;
 682                 }
 683             }
 684             else
 685             {
 686               try_plus_filename:
 687                 if (*tmp == '+' && g_ascii_isdigit ((gchar) tmp[1]))
 688                 {
 689                     int start_line;
 690
 691                     start_line = atoi (tmp);
 692
 693                     /*
 694                      * If start_line is zero, position the cursor at the
 695                      * beginning of the file as other editors (vi, nano)
 696                      */
 697                     if (start_line == 0)
 698                         start_line++;
 699
 700                     if (start_line > 0)
 701                     {
 702                         char *file;
 703
 704                         file = (argc > 1) ? argv[2] : NULL;
 705                         if (file != NULL)
 706                         {
 707                             tmp = file;
 708                             mc_args__edit_start_line = start_line;
 709                         }
 710                     }
 711                 }
 712                 mc_run_param0 = g_strdup (tmp);
 713             }
 714         }
 715         mc_global.mc_run_mode = MC_RUN_EDITOR;
 716     }
 717     else if (strncmp (base, "mcv", 3) == 0 || strcmp (base, "view") == 0)
 718     {
 719         /* mcv* or view is link to mc */
 720
 721         if (tmp != NULL)
 722             mc_run_param0 = g_strdup (tmp);
 723         else
 724         {
 725             *error = g_error_new (MC_ERROR, 0, "%s\n", _("No arguments given to the viewer."));
 726             return FALSE;
 727         }
 728         mc_global.mc_run_mode = MC_RUN_VIEWER;
 729     }
 730 #ifdef USE_DIFF_VIEW
 731     else if (strncmp (base, "mcd", 3) == 0 || strcmp (base, "diff") == 0)
 732     {
 733         /* mcd* or diff is link to mc */
 734
 735         if (argc < 3)
 736         {
 737             *error = g_error_new (MC_ERROR, 0, "%s\n",
 738                                   _("Two files are required to evoke the diffviewer."));
 739             return FALSE;
 740         }
 741
 742         if (tmp != NULL)
 743         {
 744             mc_run_param0 = g_strdup (tmp);
 745             tmp = (argc > 1) ? argv[2] : NULL;
 746             if (tmp != NULL)
 747                 mc_run_param1 = g_strdup (tmp);
 748             mc_global.mc_run_mode = MC_RUN_DIFFVIEWER;
 749         }
 750     }
 751 #endif /* USE_DIFF_VIEW */
 752     else
 753     {
 754         /* MC is run as mc */
 755
 756         switch (mc_global.mc_run_mode)
 757         {
 758         case MC_RUN_EDITOR:
 759         case MC_RUN_VIEWER:
 760             /* mc_run_param0 is set up in parse_mc_e_argument() and parse_mc_v_argument() */
 761             break;
 762
 763         case MC_RUN_DIFFVIEWER:
 764             /* not implemented yet */
 765             break;
 766
 767         case MC_RUN_FULL:
 768         default:
 769             /* sets the current dir and the other dir */
 770             if (tmp != NULL)
 771             {
 772                 mc_run_param0 = g_strdup (tmp);
 773                 tmp = (argc > 1) ? argv[2] : NULL;
 774                 if (tmp != NULL)
 775                     mc_run_param1 = g_strdup (tmp);
 776             }
 777             mc_global.mc_run_mode = MC_RUN_FULL;
 778             break;
 779         }
 780     }
 781
 782     return TRUE;
 783 }
 784
 785 /* --------------------------------------------------------------------------------------------- */