mc/src/main.c

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/*
Main program for the Midnight Commander
Copyright (C) 1994-2024
Free Software Foundation, Inc.
Written by:
Miguel de Icaza, 1994, 1995, 1996, 1997
Janne Kukonlehto, 1994, 1995
Norbert Warmuth, 1997
This file is part of the Midnight Commander.
The Midnight Commander is free software: you can redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation, either version 3 of the License,
or (at your option) any later version.
The Midnight Commander is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
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/** \file main.c
* \brief Source: this is a main module
*/
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#include <config.h>
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#include <ctype.h>
#include <errno.h>
#include <locale.h>
#include <pwd.h> /* for username in xterm title */
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <signal.h>
#include <unistd.h> /* getsid() */
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#include "lib/global.h"
#include "lib/event.h"
#include "lib/tty/tty.h"
#include "lib/tty/key.h" /* For init_key() */
#include "lib/tty/mouse.h" /* init_mouse() */
#include "lib/skin.h"
#include "lib/filehighlight.h"
#include "lib/fileloc.h"
#include "lib/strutil.h"
#include "lib/util.h"
#include "lib/vfs/vfs.h" /* vfs_init(), vfs_shut() */
#include "filemanager/filemanager.h"
#include "filemanager/treestore.h" /* tree_store_save */
#include "filemanager/layout.h"
#include "filemanager/ext.h" /* flush_extension_file() */
#include "filemanager/command.h" /* cmdline */
#include "filemanager/panel.h" /* panalized_panel */
#include "filemanager/filenot.h" /* my_rmdir() */
#ifdef USE_INTERNAL_EDIT
#include "editor/edit.h" /* edit_arg_free() */
#endif
#include "vfs/plugins_init.h"
#include "events_init.h"
#include "args.h"
#ifdef ENABLE_SUBSHELL
#include "subshell/subshell.h"
#endif
#include "keymap.h"
#include "setup.h" /* load_setup() */
#ifdef HAVE_CHARSET
#include "lib/charsets.h"
#include "selcodepage.h"
#endif /* HAVE_CHARSET */
#include "consaver/cons.saver.h" /* cons_saver_pid */
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/*** global variables ****************************************************************************/
/*** file scope macro definitions ****************************************************************/
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/*** file scope type declarations ****************************************************************/
/*** forward declarations (file scope functions) *************************************************/
/*** file scope variables ************************************************************************/
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/* --------------------------------------------------------------------------------------------- */
/*** file scope functions ************************************************************************/
/* --------------------------------------------------------------------------------------------- */
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static void
check_codeset (void)
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{
const char *current_system_codepage = NULL;
current_system_codepage = str_detect_termencoding ();
#ifdef HAVE_CHARSET
{
const char *_display_codepage;
_display_codepage = get_codepage_id (mc_global.display_codepage);
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if (strcmp (_display_codepage, current_system_codepage) != 0)
{
mc_global.display_codepage = get_codepage_index (current_system_codepage);
if (mc_global.display_codepage == -1)
mc_global.display_codepage = 0;
mc_config_set_string (mc_global.main_config, CONFIG_MISC_SECTION, "display_codepage",
cp_display);
}
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}
#endif
mc_global.utf8_display = str_isutf8 (current_system_codepage);
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}
/* --------------------------------------------------------------------------------------------- */
/** POSIX version. The only version we support. */
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static void
OS_Setup (void)
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{
const char *datadir_env;
mc_shell_init ();
/* This is the directory, where MC was installed, on Unix this is DATADIR */
/* and can be overridden by the MC_DATADIR environment variable */
datadir_env = g_getenv ("MC_DATADIR");
if (datadir_env != NULL)
mc_global.sysconfig_dir = g_strdup (datadir_env);
else
mc_global.sysconfig_dir = g_strdup (SYSCONFDIR);
mc_global.share_data_dir = g_strdup (DATADIR);
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}
/* --------------------------------------------------------------------------------------------- */
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static void
sigchld_handler_no_subshell (int sig)
{
#ifdef __linux__
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int pid, status;
if (mc_global.tty.console_flag == '\0')
return;
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/* COMMENT: if it were true that after the call to handle_console(..INIT)
the value of mc_global.tty.console_flag never changed, we could simply not install
this handler at all if (!mc_global.tty.console_flag && !mc_global.tty.use_subshell). */
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/* That comment is no longer true. We need to wait() on a sigchld
handler (that's at least what the tarfs code expects currently). */
pid = waitpid (cons_saver_pid, &status, WUNTRACED | WNOHANG);
if (pid == cons_saver_pid)
{
if (WIFSTOPPED (status))
{
/* Someone has stopped cons.saver - restart it */
kill (pid, SIGCONT);
}
else
{
/* cons.saver has died - disable console saving */
handle_console (CONSOLE_DONE);
mc_global.tty.console_flag = '\0';
}
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}
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/* If we got here, some other child exited; ignore it */
#endif /* __linux__ */
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(void) sig;
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}
/* --------------------------------------------------------------------------------------------- */
static void
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init_sigchld (void)
{
struct sigaction sigchld_action;
memset (&sigchld_action, 0, sizeof (sigchld_action));
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sigchld_action.sa_handler =
#ifdef ENABLE_SUBSHELL
mc_global.tty.use_subshell ? sigchld_handler :
#endif /* ENABLE_SUBSHELL */
sigchld_handler_no_subshell;
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sigemptyset (&sigchld_action.sa_mask);
#ifdef SA_RESTART
sigchld_action.sa_flags = SA_RESTART;
#endif /* !SA_RESTART */
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if (my_sigaction (SIGCHLD, &sigchld_action, NULL) == -1)
{
#ifdef ENABLE_SUBSHELL
/*
* This may happen on QNX Neutrino 6, where SA_RESTART
* is defined but not implemented. Fallback to no subshell.
*/
mc_global.tty.use_subshell = FALSE;
#endif /* ENABLE_SUBSHELL */
}
}
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/* --------------------------------------------------------------------------------------------- */
/**
* Check MC_SID to prevent running one mc from another.
*
* @return TRUE if no parent mc in our session was found, FALSE otherwise.
*/
static gboolean
check_sid (void)
{
pid_t my_sid, old_sid;
const char *sid_str;
sid_str = getenv ("MC_SID");
if (sid_str == NULL)
return TRUE;
old_sid = (pid_t) strtol (sid_str, NULL, 0);
if (old_sid == 0)
return TRUE;
my_sid = getsid (0);
if (my_sid == -1)
return TRUE;
/* The parent mc is in a different session, it's OK */
return (old_sid != my_sid);
}
/* --------------------------------------------------------------------------------------------- */
/*** public functions ****************************************************************************/
/* --------------------------------------------------------------------------------------------- */
int
main (int argc, char *argv[])
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{
GError *mcerror = NULL;
int exit_code = EXIT_FAILURE;
const char *tmpdir = NULL;
mc_global.run_from_parent_mc = !check_sid ();
/* We had LC_CTYPE before, LC_ALL includs LC_TYPE as well */
#ifdef HAVE_SETLOCALE
(void) setlocale (LC_ALL, "");
#endif
(void) bindtextdomain (PACKAGE, LOCALEDIR);
(void) textdomain (PACKAGE);
/* do this before args parsing */
str_init_strings (NULL);
mc_setup_run_mode (argv); /* are we mc? editor? viewer? etc... */
if (!mc_args_parse (&argc, &argv, "mc", &mcerror))
{
startup_exit_falure:
fprintf (stderr, _("Failed to run:\n%s\n"), mcerror->message);
g_error_free (mcerror);
startup_exit_ok:
mc_shell_deinit ();
str_uninit_strings ();
return exit_code;
}
/* check terminal type
* $TERM must be set and not empty
* mc_global.tty.xterm_flag is used in init_key() and tty_init()
* Do this after mc_args_parse() where mc_args__force_xterm is set up.
*/
mc_global.tty.xterm_flag = tty_check_term (mc_args__force_xterm);
/* do this before mc_args_show_info () to view paths in the --datadir-info output */
OS_Setup ();
if (!g_path_is_absolute (mc_config_get_home_dir ()))
{
mc_propagate_error (&mcerror, 0, "%s: %s", _("Home directory path is not absolute"),
mc_config_get_home_dir ());
mc_event_deinit (NULL);
goto startup_exit_falure;
}
if (!mc_args_show_info ())
{
exit_code = EXIT_SUCCESS;
goto startup_exit_ok;
}
if (!events_init (&mcerror))
goto startup_exit_falure;
mc_config_init_config_paths (&mcerror);
if (mcerror != NULL)
{
mc_event_deinit (NULL);
goto startup_exit_falure;
}
vfs_init ();
vfs_plugins_init ();
load_setup ();
/* Must be done after load_setup because depends on mc_global.vfs.cd_symlinks */
vfs_setup_work_dir ();
/* Set up temporary directory after VFS initialization */
tmpdir = mc_tmpdir ();
/* do this after vfs initialization and vfs working directory setup
due to mc_setctl() and mcedit_arg_vpath_new() calls in mc_setup_by_args() */
if (!mc_setup_by_args (argc, argv, &mcerror))
{
/* At exit, do this before vfs_shut():
normally, temporary directory should be empty */
vfs_expire (TRUE);
(void) my_rmdir (tmpdir);
vfs_shut ();
done_setup ();
g_free (saved_other_dir);
mc_event_deinit (NULL);
goto startup_exit_falure;
}
/* Resolve the other_dir panel option.
* 1. Must be done after vfs_setup_work_dir().
* 2. Must be done after mc_setup_by_args() because of mc_run_mode.
*/
if (mc_global.mc_run_mode == MC_RUN_FULL)
{
char *buffer;
vfs_path_t *vpath;
buffer = mc_config_get_string (mc_global.panels_config, "Dirs", "other_dir", ".");
vpath = vfs_path_from_str (buffer);
if (vfs_file_is_local (vpath))
saved_other_dir = buffer;
else
g_free (buffer);
vfs_path_free (vpath, TRUE);
}
/* NOTE: This has to be called before tty_init or whatever routine
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calls any define_sequence */
init_key ();
/* Must be done before installing the SIGCHLD handler [[FIXME]] */
handle_console (CONSOLE_INIT);
#ifdef ENABLE_SUBSHELL
/* Disallow subshell when invoked as standalone viewer or editor from running mc */
if (mc_global.mc_run_mode != MC_RUN_FULL && mc_global.run_from_parent_mc)
mc_global.tty.use_subshell = FALSE;
if (mc_global.tty.use_subshell)
subshell_get_console_attributes ();
#endif /* ENABLE_SUBSHELL */
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/* Install the SIGCHLD handler; must be done before init_subshell() */
init_sigchld ();
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/* We need this, since ncurses endwin () doesn't restore the signals */
save_stop_handler ();
/* Must be done before init_subshell, to set up the terminal size: */
/* FIXME: Should be removed and LINES and COLS computed on subshell */
tty_init (!mc_args__nomouse, mc_global.tty.xterm_flag);
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/* start check mc_global.display_codepage and mc_global.source_codepage */
check_codeset ();
/* Removing this from the X code let's us type C-c */
load_key_defs ();
keymap_load (!mc_args__nokeymap);
#ifdef USE_INTERNAL_EDIT
macros_list = g_array_new (TRUE, FALSE, sizeof (macros_t));
#endif /* USE_INTERNAL_EDIT */
tty_init_colors (mc_global.tty.disable_colors, mc_args__force_colors);
mc_skin_init (NULL, &mcerror);
dlg_set_default_colors ();
input_set_default_colors ();
if (mc_global.mc_run_mode == MC_RUN_FULL)
command_set_default_colors ();
mc_error_message (&mcerror, NULL);
#ifdef ENABLE_SUBSHELL
/* Done here to ensure that the subshell doesn't */
/* inherit the file descriptors opened below, etc */
if (mc_global.tty.use_subshell && mc_global.run_from_parent_mc)
{
int r;
r = query_dialog (_("Warning"),
_("GNU Midnight Commander\nis already running on this terminal.\n"
"Subshell support will be disabled."),
D_ERROR, 2, _("&OK"), _("&Quit"));
if (r == 0)
{
/* parent mc was found and the user wants to continue */
;
}
else
{
/* parent mc was found and the user wants to quit mc */
mc_global.midnight_shutdown = TRUE;
}
mc_global.tty.use_subshell = FALSE;
}
if (mc_global.tty.use_subshell)
init_subshell ();
#endif /* ENABLE_SUBSHELL */
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if (!mc_global.midnight_shutdown)
{
/* Also done after init_subshell, to save any shell init file messages */
if (mc_global.tty.console_flag != '\0')
handle_console (CONSOLE_SAVE);
if (mc_global.tty.alternate_plus_minus)
application_keypad_mode ();
These are a bunch of changes to fix CORBA and session management. They are almost complete (i.e. to handle all nitty gritty cases), but they seem to be working OK right now. SM should be much more stable now. Please tell me if you find any weird behavior - Federico 1999-03-30 Federico Mena Quintero <federico@nuclecu.unam.mx> * gdesktop-icon.c (desktop_icon_realize): Remove the WM_CLIENT_LEADER property from icon windows so that window managers will not store SM information for them. * gnome-open-dialog.c: Added missing #includes. * gdesktop-init.c (desktop_init_at): Removed an unused variable. * gdesktop.h: Added some missing prototypes. * gmain.h: Added some missing prototypes. * Makefile.in: Added gsession.[ch] to the list of sources. * gmain.c (create_panels): Consider whether we have a CORBA server and session management. * gdesktop.c: #include "gdesktop-init.h" * gdesktop.c: Added a missing cast to GNOME_DIALOG. * gmain.c (create_panels): Removed the run_desktop global variable. * glayout.c (create_container): Set the wmclass of the panel to include its unique ID. * gsession.[ch]: New file with the functions that deal with session management. * glayout.c (gnome_exit): Use session_set_restart(). * gcorba.c (corba_init): Now returns an int with an error value. (corba_init_server): Initialize the server properly. Fixed all the object implementation code. (corba_create_window): New function used to create a window with the CORBA server. * gmain.c (gnome_check_super_user): Now the check for running as root is done here. There should be no GUI code in src/. 1999-03-30 Federico Mena Quintero <federico@nuclecu.unam.mx> * dlg.c (dlg_run_done): Do not call the callback of a NULL current widget. * setup.h: Added missing prototype for setup_init(). * filegui.c (check_progress_buttons): Added a missing return value. * dlg.c (remove_widget): Added a missing return value. * main.c: Removed the global directory_list variable. Removed the main_corba_register_server() function. * main.h: Removed the global run_desktop variable. * panel.h: Now the panel structure has a unique numerical ID used for session management. * screen.c (panel_new): Maintain a unique ID for each panel. * main.c (maybe_display_linksdir): Handle display of the desktop init dir here. (main): Call gnome_check_super_user(). (init_corba_with_args): Call corba_init_server(). * main.c (init_corba_with_args): Do CORBA initialization here. Also removed the global force_activation option. 1999-03-30 Federico Mena Quintero <federico@nuclecu.unam.mx> * vfs.c (vfs_add_current_stamps): Only do stamping of the panels if they exist. * mcserv.c: #include <sys/wait.h> (get_client): Put `#ifdef __EMX__' around an otherwise-unused variable. * utilvfs.c (vfs_split_url): Fix NULL <-> 0 confusion when comparing characters. * ftpfs.c (retrieve_dir): Removed unused variable dot_dot_found. * extfs.c (extfs_init): Assign `key' to c, not `&key'.
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/* Done after subshell initialization to allow select and paste text by mouse
w/o Shift button in subshell in the native console */
init_mouse ();
/* Done after tty_enter_ca_mode (tty_init) because in VTE bracketed mode is
separate for the normal and alternate screens */
enable_bracketed_paste ();
/* subshell_prompt is NULL here */
mc_prompt = (geteuid () == 0) ? "# " : "$ ";
}
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/* Program main loop */
if (mc_global.midnight_shutdown)
exit_code = EXIT_SUCCESS;
else
exit_code = do_nc ()? EXIT_SUCCESS : EXIT_FAILURE;
disable_bracketed_paste ();
disable_mouse ();
/* Save the tree store */
(void) tree_store_save ();
keymap_free ();
/* At exit, do this before vfs_shut():
normally, temporary directory should be empty */
vfs_expire (TRUE);
(void) my_rmdir (tmpdir);
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/* Virtual File System shutdown */
vfs_shut ();
flush_extension_file (); /* does only free memory */
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mc_skin_deinit ();
tty_colors_done ();
tty_shutdown ();
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done_setup ();
if (mc_global.tty.console_flag != '\0' && (quit & SUBSHELL_EXIT) == 0)
handle_console (CONSOLE_RESTORE);
if (mc_global.tty.alternate_plus_minus)
numeric_keypad_mode ();
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(void) my_signal (SIGCHLD, SIG_DFL); /* Disable the SIGCHLD handler */
if (mc_global.tty.console_flag != '\0')
handle_console (CONSOLE_DONE);
if (mc_global.mc_run_mode == MC_RUN_FULL && mc_args__last_wd_file != NULL
&& last_wd_string != NULL && !print_last_revert)
{
int last_wd_fd;
last_wd_fd = open (mc_args__last_wd_file, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
if (last_wd_fd != -1)
{
ssize_t ret1;
int ret2;
ret1 = write (last_wd_fd, last_wd_string, strlen (last_wd_string));
ret2 = close (last_wd_fd);
(void) ret1;
(void) ret2;
}
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}
g_free (last_wd_string);
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mc_shell_deinit ();
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done_key ();
#ifdef USE_INTERNAL_EDIT
if (macros_list != NULL)
{
guint i;
for (i = 0; i < macros_list->len; i++)
{
macros_t *macros;
macros = &g_array_index (macros_list, struct macros_t, i);
if (macros != NULL && macros->macro != NULL)
(void) g_array_free (macros->macro, TRUE);
}
(void) g_array_free (macros_list, TRUE);
}
#endif /* USE_INTERNAL_EDIT */
str_uninit_strings ();
if (mc_global.mc_run_mode != MC_RUN_EDITOR)
g_free (mc_run_param0);
#ifdef USE_INTERNAL_EDIT
else
g_list_free_full ((GList *) mc_run_param0, (GDestroyNotify) edit_arg_free);
#endif /* USE_INTERNAL_EDIT */
g_free (mc_run_param1);
g_free (saved_other_dir);
mc_config_deinit_config_paths ();
(void) mc_event_deinit (&mcerror);
if (mcerror != NULL)
{
fprintf (stderr, _("\nFailed while close:\n%s\n"), mcerror->message);
g_error_free (mcerror);
exit_code = EXIT_FAILURE;
}
(void) putchar ('\n'); /* Hack to make shell's prompt start at left of screen */
return exit_code;
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}
/* --------------------------------------------------------------------------------------------- */