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() */
52 #include "lib/timer.h"
54 #include "lib/filehighlight.h"
55 #include "lib/fileloc.h"
56 #include "lib/strutil.h"
58 #include "lib/vfs/vfs.h" /* vfs_init(), vfs_shut() */
60 #include "filemanager/midnight.h" /* current_panel */
61 #include "filemanager/treestore.h" /* tree_store_save */
62 #include "filemanager/layout.h"
63 #include "filemanager/ext.h" /* flush_extension_file() */
64 #include "filemanager/command.h" /* cmdline */
65 #include "filemanager/panel.h" /* panalized_panel */
67 #include "vfs/plugins_init.h"
69 #include "events_init.h"
71 #ifdef ENABLE_SUBSHELL
72 #include "subshell/subshell.h"
74 #include "setup.h" /* load_setup() */
77 #include "lib/charsets.h"
78 #include "selcodepage.h"
79 #endif /* HAVE_CHARSET */
81 #include "consaver/cons.saver.h" /* cons_saver_pid */
83 /*** global variables ****************************************************************************/
85 /*** file scope macro definitions ****************************************************************/
87 /*** file scope type declarations ****************************************************************/
89 /*** file scope variables ************************************************************************/
91 /*** file scope functions ************************************************************************/
92 /* --------------------------------------------------------------------------------------------- */
97 const char *current_system_codepage
= NULL
;
99 current_system_codepage
= str_detect_termencoding ();
103 const char *_display_codepage
;
105 _display_codepage
= get_codepage_id (mc_global
.display_codepage
);
107 if (strcmp (_display_codepage
, current_system_codepage
) != 0)
109 mc_global
.display_codepage
= get_codepage_index (current_system_codepage
);
110 if (mc_global
.display_codepage
== -1)
111 mc_global
.display_codepage
= 0;
113 mc_config_set_string (mc_global
.main_config
, CONFIG_MISC_SECTION
, "display_codepage",
119 mc_global
.utf8_display
= str_isutf8 (current_system_codepage
);
122 /* --------------------------------------------------------------------------------------------- */
123 /** POSIX version. The only version we support. */
128 const char *datadir_env
;
132 /* This is the directory, where MC was installed, on Unix this is DATADIR */
133 /* and can be overriden by the MC_DATADIR environment variable */
134 datadir_env
= g_getenv ("MC_DATADIR");
135 if (datadir_env
!= NULL
)
136 mc_global
.sysconfig_dir
= g_strdup (datadir_env
);
138 mc_global
.sysconfig_dir
= g_strdup (SYSCONFDIR
);
140 mc_global
.share_data_dir
= g_strdup (DATADIR
);
143 /* --------------------------------------------------------------------------------------------- */
146 sigchld_handler_no_subshell (int sig
)
151 if (mc_global
.tty
.console_flag
== '\0')
154 /* COMMENT: if it were true that after the call to handle_console(..INIT)
155 the value of mc_global.tty.console_flag never changed, we could simply not install
156 this handler at all if (!mc_global.tty.console_flag && !mc_global.tty.use_subshell). */
158 /* That comment is no longer true. We need to wait() on a sigchld
159 handler (that's at least what the tarfs code expects currently). */
161 pid
= waitpid (cons_saver_pid
, &status
, WUNTRACED
| WNOHANG
);
163 if (pid
== cons_saver_pid
)
165 if (WIFSTOPPED (status
))
167 /* Someone has stopped cons.saver - restart it */
172 /* cons.saver has died - disable console saving */
173 handle_console (CONSOLE_DONE
);
174 mc_global
.tty
.console_flag
= '\0';
177 /* If we got here, some other child exited; ignore it */
178 #endif /* __linux__ */
183 /* --------------------------------------------------------------------------------------------- */
188 struct sigaction sigchld_action
;
190 memset (&sigchld_action
, 0, sizeof (sigchld_action
));
191 sigchld_action
.sa_handler
=
192 #ifdef ENABLE_SUBSHELL
193 mc_global
.tty
.use_subshell
? sigchld_handler
:
194 #endif /* ENABLE_SUBSHELL */
195 sigchld_handler_no_subshell
;
197 sigemptyset (&sigchld_action
.sa_mask
);
200 sigchld_action
.sa_flags
= SA_RESTART
;
201 #endif /* !SA_RESTART */
203 if (sigaction (SIGCHLD
, &sigchld_action
, NULL
) == -1)
205 #ifdef ENABLE_SUBSHELL
207 * This may happen on QNX Neutrino 6, where SA_RESTART
208 * is defined but not implemented. Fallback to no subshell.
210 mc_global
.tty
.use_subshell
= FALSE
;
211 #endif /* ENABLE_SUBSHELL */
215 /* --------------------------------------------------------------------------------------------- */
217 * Check MC_SID to prevent running one mc from another.
219 * @return TRUE if no parent mc in our session was found, FALSE otherwise.
225 pid_t my_sid
, old_sid
;
228 sid_str
= getenv ("MC_SID");
232 old_sid
= (pid_t
) strtol (sid_str
, NULL
, 0);
240 /* The parent mc is in a different session, it's OK */
241 return (old_sid
!= my_sid
);
244 /* --------------------------------------------------------------------------------------------- */
245 /*** public functions ****************************************************************************/
246 /* --------------------------------------------------------------------------------------------- */
249 main (int argc
, char *argv
[])
251 GError
*mcerror
= NULL
;
252 gboolean config_migrated
= FALSE
;
253 char *config_migrate_msg
= NULL
;
254 int exit_code
= EXIT_FAILURE
;
256 mc_global
.run_from_parent_mc
= !check_sid ();
258 mc_global
.timer
= mc_timer_new ();
260 /* We had LC_CTYPE before, LC_ALL includs LC_TYPE as well */
261 #ifdef HAVE_SETLOCALE
262 (void) setlocale (LC_ALL
, "");
264 (void) bindtextdomain (PACKAGE
, LOCALEDIR
);
265 (void) textdomain (PACKAGE
);
267 /* do this before args parsing */
268 str_init_strings (NULL
);
270 mc_setup_run_mode (argv
); /* are we mc? editor? viewer? etc... */
272 if (!mc_args_parse (&argc
, &argv
, "mc", &mcerror
))
275 fprintf (stderr
, _("Failed to run:\n%s\n"), mcerror
->message
);
276 g_error_free (mcerror
);
279 str_uninit_strings ();
280 mc_timer_destroy (mc_global
.timer
);
284 /* do this before mc_args_show_info () to view paths in the --datadir-info output */
287 if (!g_path_is_absolute (mc_config_get_home_dir ()))
289 mc_propagate_error (&mcerror
, 0, "%s: %s", _("Home directory path is not absolute"),
290 mc_config_get_home_dir ());
291 mc_event_deinit (NULL
);
292 goto startup_exit_falure
;
295 if (!mc_args_show_info ())
297 exit_code
= EXIT_SUCCESS
;
298 goto startup_exit_ok
;
301 if (!events_init (&mcerror
))
302 goto startup_exit_falure
;
304 mc_config_init_config_paths (&mcerror
);
305 config_migrated
= mc_config_migrate_from_old_place (&mcerror
, &config_migrate_msg
);
308 mc_event_deinit (NULL
);
309 goto startup_exit_falure
;
317 /* Must be done after load_setup because depends on mc_global.vfs.cd_symlinks */
318 vfs_setup_work_dir ();
320 /* Set up temporary directory after VFS initialization */
323 /* do this after vfs initialization and vfs working directory setup
324 due to mc_setctl() and mcedit_arg_vpath_new() calls in mc_setup_by_args() */
325 if (!mc_setup_by_args (argc
, argv
, &mcerror
))
329 g_free (saved_other_dir
);
330 mc_event_deinit (NULL
);
331 goto startup_exit_falure
;
334 /* Resolve the other_dir panel option.
335 * 1. Must be done after vfs_setup_work_dir().
336 * 2. Must be done after mc_setup_by_args() because of mc_run_mode.
338 if (mc_global
.mc_run_mode
== MC_RUN_FULL
)
343 buffer
= mc_config_get_string (mc_global
.panels_config
, "Dirs", "other_dir", ".");
344 vpath
= vfs_path_from_str (buffer
);
345 if (vfs_file_is_local (vpath
))
346 saved_other_dir
= buffer
;
349 vfs_path_free (vpath
);
352 /* check terminal type
353 * $TERM must be set and not empty
354 * mc_global.tty.xterm_flag is used in init_key() and tty_init()
355 * Do this after mc_args_handle() where mc_args__force_xterm is set up.
357 mc_global
.tty
.xterm_flag
= tty_check_term (mc_args__force_xterm
);
359 /* NOTE: This has to be called before tty_init or whatever routine
360 calls any define_sequence */
363 /* Must be done before installing the SIGCHLD handler [[FIXME]] */
364 handle_console (CONSOLE_INIT
);
366 #ifdef ENABLE_SUBSHELL
367 /* Disallow subshell when invoked as standalone viewer or editor from running mc */
368 if (mc_global
.mc_run_mode
!= MC_RUN_FULL
&& mc_global
.run_from_parent_mc
)
369 mc_global
.tty
.use_subshell
= FALSE
;
371 if (mc_global
.tty
.use_subshell
)
372 subshell_get_console_attributes ();
373 #endif /* ENABLE_SUBSHELL */
375 /* Install the SIGCHLD handler; must be done before init_subshell() */
378 /* We need this, since ncurses endwin () doesn't restore the signals */
379 save_stop_handler ();
381 /* Must be done before init_subshell, to set up the terminal size: */
382 /* FIXME: Should be removed and LINES and COLS computed on subshell */
383 tty_init (!mc_args__nomouse
, mc_global
.tty
.xterm_flag
);
385 /* start check mc_global.display_codepage and mc_global.source_codepage */
388 /* Removing this from the X code let's us type C-c */
391 load_keymap_defs (!mc_args__nokeymap
);
393 #ifdef USE_INTERNAL_EDIT
394 macros_list
= g_array_new (TRUE
, FALSE
, sizeof (macros_t
));
395 #endif /* USE_INTERNAL_EDIT */
397 tty_init_colors (mc_global
.tty
.disable_colors
, mc_args__force_colors
);
399 mc_skin_init (NULL
, &mcerror
);
400 dlg_set_default_colors ();
401 input_set_default_colors ();
402 if (mc_global
.mc_run_mode
== MC_RUN_FULL
)
403 command_set_default_colors ();
405 mc_error_message (&mcerror
, NULL
);
407 #ifdef ENABLE_SUBSHELL
408 /* Done here to ensure that the subshell doesn't */
409 /* inherit the file descriptors opened below, etc */
410 if (mc_global
.tty
.use_subshell
&& mc_global
.run_from_parent_mc
)
414 r
= query_dialog (_("Warning"),
415 _("GNU Midnight Commander\nis already running on this terminal.\n"
416 "Subshell support will be disabled."),
417 D_ERROR
, 2, _("&OK"), _("&Quit"));
420 /* parent mc was found and the user wants to continue */
425 /* parent mc was found and the user wants to quit mc */
426 mc_global
.midnight_shutdown
= TRUE
;
429 mc_global
.tty
.use_subshell
= FALSE
;
432 if (mc_global
.tty
.use_subshell
)
434 #endif /* ENABLE_SUBSHELL */
436 if (!mc_global
.midnight_shutdown
)
438 /* Also done after init_subshell, to save any shell init file messages */
439 if (mc_global
.tty
.console_flag
!= '\0')
440 handle_console (CONSOLE_SAVE
);
442 if (mc_global
.tty
.alternate_plus_minus
)
443 application_keypad_mode ();
445 /* Done after subshell initialization to allow select and paste text by mouse
446 w/o Shift button in subshell in the native console */
449 /* Done after tty_enter_ca_mode (tty_init) because in VTE bracketed mode is
450 separate for the normal and alternate screens */
451 enable_bracketed_paste ();
453 /* subshell_prompt is NULL here */
454 mc_prompt
= (geteuid () == 0) ? "# " : "$ ";
458 message (D_ERROR
, _("Warning"), "%s", config_migrate_msg
);
459 g_free (config_migrate_msg
);
463 /* Program main loop */
464 if (mc_global
.midnight_shutdown
)
465 exit_code
= EXIT_SUCCESS
;
467 exit_code
= do_nc ()? EXIT_SUCCESS
: EXIT_FAILURE
;
469 disable_bracketed_paste ();
473 /* Save the tree store */
474 (void) tree_store_save ();
478 /* Virtual File System shutdown */
481 flush_extension_file (); /* does only free memory */
490 if (mc_global
.tty
.console_flag
!= '\0' && (quit
& SUBSHELL_EXIT
) == 0)
491 handle_console (CONSOLE_RESTORE
);
492 if (mc_global
.tty
.alternate_plus_minus
)
493 numeric_keypad_mode ();
495 (void) signal (SIGCHLD
, SIG_DFL
); /* Disable the SIGCHLD handler */
497 if (mc_global
.tty
.console_flag
!= '\0')
498 handle_console (CONSOLE_DONE
);
500 if (mc_global
.mc_run_mode
== MC_RUN_FULL
&& mc_args__last_wd_file
!= NULL
501 && last_wd_string
!= NULL
&& !print_last_revert
)
505 last_wd_fd
= open (mc_args__last_wd_file
, O_WRONLY
| O_CREAT
| O_TRUNC
| O_EXCL
,
507 if (last_wd_fd
!= -1)
511 ret1
= write (last_wd_fd
, last_wd_string
, strlen (last_wd_string
));
512 ret2
= close (last_wd_fd
);
517 g_free (last_wd_string
);
523 #ifdef USE_INTERNAL_EDIT
524 if (macros_list
!= NULL
)
528 for (i
= 0; i
< macros_list
->len
; i
++)
532 macros
= &g_array_index (macros_list
, struct macros_t
, i
);
533 if (macros
!= NULL
&& macros
->macro
!= NULL
)
534 (void) g_array_free (macros
->macro
, TRUE
);
536 (void) g_array_free (macros_list
, TRUE
);
538 #endif /* USE_INTERNAL_EDIT */
540 str_uninit_strings ();
542 if (mc_global
.mc_run_mode
!= MC_RUN_EDITOR
)
543 g_free (mc_run_param0
);
545 g_list_free_full ((GList
*) mc_run_param0
, (GDestroyNotify
) mcedit_arg_free
);
547 g_free (mc_run_param1
);
548 g_free (saved_other_dir
);
550 mc_config_deinit_config_paths ();
552 (void) mc_event_deinit (&mcerror
);
555 fprintf (stderr
, _("\nFailed while close:\n%s\n"), mcerror
->message
);
556 g_error_free (mcerror
);
557 exit_code
= EXIT_FAILURE
;
560 mc_timer_destroy (mc_global
.timer
);
562 (void) putchar ('\n'); /* Hack to make shell's prompt start at left of screen */
567 /* --------------------------------------------------------------------------------------------- */