2 Main program for the Midnight Commander
4 Copyright (C) 1994-2020
5 Free Software Foundation, Inc.
8 Miguel de Icaza, 1994, 1995, 1996, 1997
9 Janne Kukonlehto, 1994, 1995
12 This file is part of the Midnight Commander.
14 The Midnight Commander is free software: you can redistribute it
15 and/or modify it under the terms of the GNU General Public License as
16 published by the Free Software Foundation, either version 3 of the License,
17 or (at your option) any later version.
19 The Midnight Commander is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 GNU General Public License for more details.
24 You should have received a copy of the GNU General Public License
25 along with this program. If not, see <http://www.gnu.org/licenses/>.
29 * \brief Source: this is a main module
37 #include <pwd.h> /* for username in xterm title */
41 #include <sys/types.h>
44 #include <unistd.h> /* getsid() */
46 #include "lib/global.h"
48 #include "lib/event.h"
49 #include "lib/tty/tty.h"
50 #include "lib/tty/key.h" /* For init_key() */
51 #include "lib/tty/mouse.h" /* init_mouse() */
53 #include "lib/filehighlight.h"
54 #include "lib/fileloc.h"
55 #include "lib/strutil.h"
57 #include "lib/vfs/vfs.h" /* vfs_init(), vfs_shut() */
59 #include "filemanager/filemanager.h"
60 #include "filemanager/treestore.h" /* tree_store_save */
61 #include "filemanager/layout.h"
62 #include "filemanager/ext.h" /* flush_extension_file() */
63 #include "filemanager/command.h" /* cmdline */
64 #include "filemanager/panel.h" /* panalized_panel */
66 #include "vfs/plugins_init.h"
68 #include "events_init.h"
70 #ifdef ENABLE_SUBSHELL
71 #include "subshell/subshell.h"
73 #include "setup.h" /* load_setup() */
76 #include "lib/charsets.h"
77 #include "selcodepage.h"
78 #endif /* HAVE_CHARSET */
80 #include "consaver/cons.saver.h" /* cons_saver_pid */
82 /*** global variables ****************************************************************************/
84 /*** file scope macro definitions ****************************************************************/
86 /*** file scope type declarations ****************************************************************/
88 /*** file scope variables ************************************************************************/
90 /*** file scope functions ************************************************************************/
91 /* --------------------------------------------------------------------------------------------- */
96 const char *current_system_codepage
= NULL
;
98 current_system_codepage
= str_detect_termencoding ();
102 const char *_display_codepage
;
104 _display_codepage
= get_codepage_id (mc_global
.display_codepage
);
106 if (strcmp (_display_codepage
, current_system_codepage
) != 0)
108 mc_global
.display_codepage
= get_codepage_index (current_system_codepage
);
109 if (mc_global
.display_codepage
== -1)
110 mc_global
.display_codepage
= 0;
112 mc_config_set_string (mc_global
.main_config
, CONFIG_MISC_SECTION
, "display_codepage",
118 mc_global
.utf8_display
= str_isutf8 (current_system_codepage
);
121 /* --------------------------------------------------------------------------------------------- */
122 /** POSIX version. The only version we support. */
127 const char *datadir_env
;
131 /* This is the directory, where MC was installed, on Unix this is DATADIR */
132 /* and can be overriden by the MC_DATADIR environment variable */
133 datadir_env
= g_getenv ("MC_DATADIR");
134 if (datadir_env
!= NULL
)
135 mc_global
.sysconfig_dir
= g_strdup (datadir_env
);
137 mc_global
.sysconfig_dir
= g_strdup (SYSCONFDIR
);
139 mc_global
.share_data_dir
= g_strdup (DATADIR
);
142 /* --------------------------------------------------------------------------------------------- */
145 sigchld_handler_no_subshell (int sig
)
150 if (mc_global
.tty
.console_flag
== '\0')
153 /* COMMENT: if it were true that after the call to handle_console(..INIT)
154 the value of mc_global.tty.console_flag never changed, we could simply not install
155 this handler at all if (!mc_global.tty.console_flag && !mc_global.tty.use_subshell). */
157 /* That comment is no longer true. We need to wait() on a sigchld
158 handler (that's at least what the tarfs code expects currently). */
160 pid
= waitpid (cons_saver_pid
, &status
, WUNTRACED
| WNOHANG
);
162 if (pid
== cons_saver_pid
)
164 if (WIFSTOPPED (status
))
166 /* Someone has stopped cons.saver - restart it */
171 /* cons.saver has died - disable console saving */
172 handle_console (CONSOLE_DONE
);
173 mc_global
.tty
.console_flag
= '\0';
176 /* If we got here, some other child exited; ignore it */
177 #endif /* __linux__ */
182 /* --------------------------------------------------------------------------------------------- */
187 struct sigaction sigchld_action
;
189 memset (&sigchld_action
, 0, sizeof (sigchld_action
));
190 sigchld_action
.sa_handler
=
191 #ifdef ENABLE_SUBSHELL
192 mc_global
.tty
.use_subshell
? sigchld_handler
:
193 #endif /* ENABLE_SUBSHELL */
194 sigchld_handler_no_subshell
;
196 sigemptyset (&sigchld_action
.sa_mask
);
199 sigchld_action
.sa_flags
= SA_RESTART
;
200 #endif /* !SA_RESTART */
202 if (sigaction (SIGCHLD
, &sigchld_action
, NULL
) == -1)
204 #ifdef ENABLE_SUBSHELL
206 * This may happen on QNX Neutrino 6, where SA_RESTART
207 * is defined but not implemented. Fallback to no subshell.
209 mc_global
.tty
.use_subshell
= FALSE
;
210 #endif /* ENABLE_SUBSHELL */
214 /* --------------------------------------------------------------------------------------------- */
216 * Check MC_SID to prevent running one mc from another.
218 * @return TRUE if no parent mc in our session was found, FALSE otherwise.
224 pid_t my_sid
, old_sid
;
227 sid_str
= getenv ("MC_SID");
231 old_sid
= (pid_t
) strtol (sid_str
, NULL
, 0);
239 /* The parent mc is in a different session, it's OK */
240 return (old_sid
!= my_sid
);
243 /* --------------------------------------------------------------------------------------------- */
244 /*** public functions ****************************************************************************/
245 /* --------------------------------------------------------------------------------------------- */
248 main (int argc
, char *argv
[])
250 GError
*mcerror
= NULL
;
251 gboolean config_migrated
= FALSE
;
252 char *config_migrate_msg
= NULL
;
253 int exit_code
= EXIT_FAILURE
;
255 mc_global
.run_from_parent_mc
= !check_sid ();
257 /* We had LC_CTYPE before, LC_ALL includs LC_TYPE as well */
258 #ifdef HAVE_SETLOCALE
259 (void) setlocale (LC_ALL
, "");
261 (void) bindtextdomain (PACKAGE
, LOCALEDIR
);
262 (void) textdomain (PACKAGE
);
264 /* do this before args parsing */
265 str_init_strings (NULL
);
267 mc_setup_run_mode (argv
); /* are we mc? editor? viewer? etc... */
269 if (!mc_args_parse (&argc
, &argv
, "mc", &mcerror
))
272 fprintf (stderr
, _("Failed to run:\n%s\n"), mcerror
->message
);
273 g_error_free (mcerror
);
276 str_uninit_strings ();
280 /* do this before mc_args_show_info () to view paths in the --datadir-info output */
283 if (!g_path_is_absolute (mc_config_get_home_dir ()))
285 mc_propagate_error (&mcerror
, 0, "%s: %s", _("Home directory path is not absolute"),
286 mc_config_get_home_dir ());
287 mc_event_deinit (NULL
);
288 goto startup_exit_falure
;
291 if (!mc_args_show_info ())
293 exit_code
= EXIT_SUCCESS
;
294 goto startup_exit_ok
;
297 if (!events_init (&mcerror
))
298 goto startup_exit_falure
;
300 mc_config_init_config_paths (&mcerror
);
301 config_migrated
= mc_config_migrate_from_old_place (&mcerror
, &config_migrate_msg
);
304 mc_event_deinit (NULL
);
305 goto startup_exit_falure
;
313 /* Must be done after load_setup because depends on mc_global.vfs.cd_symlinks */
314 vfs_setup_work_dir ();
316 /* Set up temporary directory after VFS initialization */
319 /* do this after vfs initialization and vfs working directory setup
320 due to mc_setctl() and mcedit_arg_vpath_new() calls in mc_setup_by_args() */
321 if (!mc_setup_by_args (argc
, argv
, &mcerror
))
325 g_free (saved_other_dir
);
326 mc_event_deinit (NULL
);
327 goto startup_exit_falure
;
330 /* Resolve the other_dir panel option.
331 * 1. Must be done after vfs_setup_work_dir().
332 * 2. Must be done after mc_setup_by_args() because of mc_run_mode.
334 if (mc_global
.mc_run_mode
== MC_RUN_FULL
)
339 buffer
= mc_config_get_string (mc_global
.panels_config
, "Dirs", "other_dir", ".");
340 vpath
= vfs_path_from_str (buffer
);
341 if (vfs_file_is_local (vpath
))
342 saved_other_dir
= buffer
;
345 vfs_path_free (vpath
);
348 /* check terminal type
349 * $TERM must be set and not empty
350 * mc_global.tty.xterm_flag is used in init_key() and tty_init()
351 * Do this after mc_args_handle() where mc_args__force_xterm is set up.
353 mc_global
.tty
.xterm_flag
= tty_check_term (mc_args__force_xterm
);
355 /* NOTE: This has to be called before tty_init or whatever routine
356 calls any define_sequence */
359 /* Must be done before installing the SIGCHLD handler [[FIXME]] */
360 handle_console (CONSOLE_INIT
);
362 #ifdef ENABLE_SUBSHELL
363 /* Disallow subshell when invoked as standalone viewer or editor from running mc */
364 if (mc_global
.mc_run_mode
!= MC_RUN_FULL
&& mc_global
.run_from_parent_mc
)
365 mc_global
.tty
.use_subshell
= FALSE
;
367 if (mc_global
.tty
.use_subshell
)
368 subshell_get_console_attributes ();
369 #endif /* ENABLE_SUBSHELL */
371 /* Install the SIGCHLD handler; must be done before init_subshell() */
374 /* We need this, since ncurses endwin () doesn't restore the signals */
375 save_stop_handler ();
377 /* Must be done before init_subshell, to set up the terminal size: */
378 /* FIXME: Should be removed and LINES and COLS computed on subshell */
379 tty_init (!mc_args__nomouse
, mc_global
.tty
.xterm_flag
);
381 /* start check mc_global.display_codepage and mc_global.source_codepage */
384 /* Removing this from the X code let's us type C-c */
387 load_keymap_defs (!mc_args__nokeymap
);
389 #ifdef USE_INTERNAL_EDIT
390 macros_list
= g_array_new (TRUE
, FALSE
, sizeof (macros_t
));
391 #endif /* USE_INTERNAL_EDIT */
393 tty_init_colors (mc_global
.tty
.disable_colors
, mc_args__force_colors
);
395 mc_skin_init (NULL
, &mcerror
);
396 dlg_set_default_colors ();
397 input_set_default_colors ();
398 if (mc_global
.mc_run_mode
== MC_RUN_FULL
)
399 command_set_default_colors ();
401 mc_error_message (&mcerror
, NULL
);
403 #ifdef ENABLE_SUBSHELL
404 /* Done here to ensure that the subshell doesn't */
405 /* inherit the file descriptors opened below, etc */
406 if (mc_global
.tty
.use_subshell
&& mc_global
.run_from_parent_mc
)
410 r
= query_dialog (_("Warning"),
411 _("GNU Midnight Commander\nis already running on this terminal.\n"
412 "Subshell support will be disabled."),
413 D_ERROR
, 2, _("&OK"), _("&Quit"));
416 /* parent mc was found and the user wants to continue */
421 /* parent mc was found and the user wants to quit mc */
422 mc_global
.midnight_shutdown
= TRUE
;
425 mc_global
.tty
.use_subshell
= FALSE
;
428 if (mc_global
.tty
.use_subshell
)
430 #endif /* ENABLE_SUBSHELL */
432 if (!mc_global
.midnight_shutdown
)
434 /* Also done after init_subshell, to save any shell init file messages */
435 if (mc_global
.tty
.console_flag
!= '\0')
436 handle_console (CONSOLE_SAVE
);
438 if (mc_global
.tty
.alternate_plus_minus
)
439 application_keypad_mode ();
441 /* Done after subshell initialization to allow select and paste text by mouse
442 w/o Shift button in subshell in the native console */
445 /* Done after tty_enter_ca_mode (tty_init) because in VTE bracketed mode is
446 separate for the normal and alternate screens */
447 enable_bracketed_paste ();
449 /* subshell_prompt is NULL here */
450 mc_prompt
= (geteuid () == 0) ? "# " : "$ ";
454 message (D_ERROR
, _("Warning"), "%s", config_migrate_msg
);
455 g_free (config_migrate_msg
);
459 /* Program main loop */
460 if (mc_global
.midnight_shutdown
)
461 exit_code
= EXIT_SUCCESS
;
463 exit_code
= do_nc ()? EXIT_SUCCESS
: EXIT_FAILURE
;
465 disable_bracketed_paste ();
469 /* Save the tree store */
470 (void) tree_store_save ();
474 /* Virtual File System shutdown */
477 flush_extension_file (); /* does only free memory */
486 if (mc_global
.tty
.console_flag
!= '\0' && (quit
& SUBSHELL_EXIT
) == 0)
487 handle_console (CONSOLE_RESTORE
);
488 if (mc_global
.tty
.alternate_plus_minus
)
489 numeric_keypad_mode ();
491 (void) signal (SIGCHLD
, SIG_DFL
); /* Disable the SIGCHLD handler */
493 if (mc_global
.tty
.console_flag
!= '\0')
494 handle_console (CONSOLE_DONE
);
496 if (mc_global
.mc_run_mode
== MC_RUN_FULL
&& mc_args__last_wd_file
!= NULL
497 && last_wd_string
!= NULL
&& !print_last_revert
)
501 last_wd_fd
= open (mc_args__last_wd_file
, O_WRONLY
| O_CREAT
| O_TRUNC
| O_EXCL
,
503 if (last_wd_fd
!= -1)
507 ret1
= write (last_wd_fd
, last_wd_string
, strlen (last_wd_string
));
508 ret2
= close (last_wd_fd
);
513 g_free (last_wd_string
);
519 #ifdef USE_INTERNAL_EDIT
520 if (macros_list
!= NULL
)
524 for (i
= 0; i
< macros_list
->len
; i
++)
528 macros
= &g_array_index (macros_list
, struct macros_t
, i
);
529 if (macros
!= NULL
&& macros
->macro
!= NULL
)
530 (void) g_array_free (macros
->macro
, TRUE
);
532 (void) g_array_free (macros_list
, TRUE
);
534 #endif /* USE_INTERNAL_EDIT */
536 str_uninit_strings ();
538 if (mc_global
.mc_run_mode
!= MC_RUN_EDITOR
)
539 g_free (mc_run_param0
);
541 g_list_free_full ((GList
*) mc_run_param0
, (GDestroyNotify
) mcedit_arg_free
);
543 g_free (mc_run_param1
);
544 g_free (saved_other_dir
);
546 mc_config_deinit_config_paths ();
548 (void) mc_event_deinit (&mcerror
);
551 fprintf (stderr
, _("\nFailed while close:\n%s\n"), mcerror
->message
);
552 g_error_free (mcerror
);
553 exit_code
= EXIT_FAILURE
;
556 (void) putchar ('\n'); /* Hack to make shell's prompt start at left of screen */
561 /* --------------------------------------------------------------------------------------------- */