mc/src/main.c
Andrew Borodin be938c611b Ticket #3247: refactoring of status_msg engine.
Initial commit: create global timer.

Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
2014-10-03 13:19:25 +04:00

512 lines
15 KiB
C

/*
Main program for the Midnight Commander
Copyright (C) 1994-2014
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,
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/>.
*/
/** \file main.c
* \brief Source: this is a main module
*/
#include <config.h>
#include <ctype.h>
#include <errno.h>
#include <locale.h>
#include <pwd.h> /* for username in xterm title */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/wait.h>
#include <signal.h>
#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/timer.h"
#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/midnight.h" /* current_panel */
#include "filemanager/treestore.h" /* tree_store_save */
#include "filemanager/layout.h" /* command_prompt */
#include "filemanager/ext.h" /* flush_extension_file() */
#include "filemanager/command.h" /* cmdline */
#include "filemanager/panel.h" /* panalized_panel */
#include "vfs/plugins_init.h"
#include "events_init.h"
#include "args.h"
#ifdef ENABLE_SUBSHELL
#include "subshell.h"
#endif
#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 */
/*** global variables ****************************************************************************/
/*** file scope macro definitions ****************************************************************/
/*** file scope type declarations ****************************************************************/
/*** file scope variables ************************************************************************/
/*** file scope functions ************************************************************************/
/* --------------------------------------------------------------------------------------------- */
static void
check_codeset (void)
{
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);
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_main_config, CONFIG_MISC_SECTION, "display_codepage",
cp_display);
}
}
#endif
mc_global.utf8_display = str_isutf8 (current_system_codepage);
}
/* --------------------------------------------------------------------------------------------- */
/** POSIX version. The only version we support. */
static void
OS_Setup (void)
{
const char *shell_env;
const char *datadir_env;
shell_env = getenv ("SHELL");
if ((shell_env == NULL) || (shell_env[0] == '\0'))
{
struct passwd *pwd;
pwd = getpwuid (geteuid ());
if (pwd != NULL)
mc_global.tty.shell = g_strdup (pwd->pw_shell);
}
else
mc_global.tty.shell = g_strdup (shell_env);
if ((mc_global.tty.shell == NULL) || (mc_global.tty.shell[0] == '\0'))
{
g_free (mc_global.tty.shell);
mc_global.tty.shell = g_strdup ("/bin/sh");
}
/* This is the directory, where MC was installed, on Unix this is DATADIR */
/* and can be overriden 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);
}
/* --------------------------------------------------------------------------------------------- */
static void
sigchld_handler_no_subshell (int sig)
{
#ifdef __linux__
int pid, status;
if (mc_global.tty.console_flag == '\0')
return;
/* 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). */
/* 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';
}
}
/* If we got here, some other child exited; ignore it */
#endif /* __linux__ */
(void) sig;
}
/* --------------------------------------------------------------------------------------------- */
static void
init_sigchld (void)
{
struct sigaction sigchld_action;
memset (&sigchld_action, 0, sizeof (sigchld_action));
sigchld_action.sa_handler =
#ifdef ENABLE_SUBSHELL
mc_global.tty.use_subshell ? sigchld_handler :
#endif /* ENABLE_SUBSHELL */
sigchld_handler_no_subshell;
sigemptyset (&sigchld_action.sa_mask);
#ifdef SA_RESTART
sigchld_action.sa_flags = SA_RESTART;
#endif /* !SA_RESTART */
if (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 */
}
}
/* --------------------------------------------------------------------------------------------- */
/*** public functions ****************************************************************************/
/* --------------------------------------------------------------------------------------------- */
int
main (int argc, char *argv[])
{
GError *mcerror = NULL;
gboolean config_migrated = FALSE;
char *config_migrate_msg;
int exit_code = EXIT_FAILURE;
mc_global.timer = mc_timer_new ();
/* 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);
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);
g_free (mc_global.tty.shell);
startup_exit_ok:
str_uninit_strings ();
mc_timer_destroy (mc_global.timer);
return exit_code;
}
/* 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);
config_migrated = mc_config_migrate_from_old_place (&mcerror, &config_migrate_msg);
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 ();
/* Resolve the other_dir panel option. Must be done after vfs_setup_work_dir */
{
char *buffer;
vfs_path_t *vpath;
buffer = mc_config_get_string (mc_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);
}
/* Set up temporary directory after VFS initialization */
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))
{
vfs_shut ();
done_setup ();
g_free (saved_other_dir);
mc_event_deinit (NULL);
goto startup_exit_falure;
}
/* check terminal type
* $TEMR must be set and not empty
* mc_global.tty.xterm_flag is used in init_key() and tty_init()
* Do this after mc_args_handle() where mc_args__force_xterm is set up.
*/
mc_global.tty.xterm_flag = tty_check_term (mc_args__force_xterm);
/* NOTE: This has to be called before tty_init or whatever routine
calls any define_sequence */
init_key ();
/* Must be done before installing the SIGCHLD handler [[FIXME]] */
handle_console (CONSOLE_INIT);
#ifdef ENABLE_SUBSHELL
/* Don't use subshell when invoked as viewer or editor */
if (mc_global.mc_run_mode != MC_RUN_FULL)
mc_global.tty.use_subshell = FALSE;
if (mc_global.tty.use_subshell)
subshell_get_console_attributes ();
#endif /* ENABLE_SUBSHELL */
/* Install the SIGCHLD handler; must be done before init_subshell() */
init_sigchld ();
/* 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);
/* 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 ();
load_keymap_defs (!mc_args__nokeymap);
macros_list = g_array_new (TRUE, FALSE, sizeof (macros_t));
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);
#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)
init_subshell ();
#endif /* ENABLE_SUBSHELL */
/* 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 ();
/* 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 do_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) ? "# " : "$ ";
if (config_migrated)
{
message (D_ERROR, _("Warning"), "%s", config_migrate_msg);
g_free (config_migrate_msg);
}
/* Program main loop */
if (mc_global.midnight_shutdown)
exit_code = EXIT_SUCCESS;
else
exit_code = do_nc ()? EXIT_SUCCESS : EXIT_FAILURE;
/* Save the tree store */
(void) tree_store_save ();
free_keymap_defs ();
/* Virtual File System shutdown */
vfs_shut ();
flush_extension_file (); /* does only free memory */
mc_skin_deinit ();
tty_colors_done ();
tty_shutdown ();
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 ();
(void) 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 | O_EXCL,
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;
}
}
g_free (last_wd_string);
g_free (mc_global.tty.shell);
done_key ();
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, FALSE);
}
(void) g_array_free (macros_list, TRUE);
}
str_uninit_strings ();
if (mc_global.mc_run_mode != MC_RUN_EDITOR)
g_free (mc_run_param0);
else
g_list_free_full ((GList *) mc_run_param0, (GDestroyNotify) mcedit_arg_free);
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;
}
mc_timer_destroy (mc_global.timer);
(void) putchar ('\n'); /* Hack to make shell's prompt start at left of screen */
return exit_code;
}
/* --------------------------------------------------------------------------------------------- */