/* Main program for the Midnight Commander Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009 Free Software Foundation, Inc. Written by: 1994, 1995, 1996, 1997 Miguel de Icaza 1994, 1995 Janne Kukonlehto 1997 Norbert Warmuth This program 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 2 of the License, or (at your option) any later version. This program 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, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ /** \file main.c * \brief Source: this is a main module */ #include #include #include #include #include #include #include #include #include /* for username in xterm title */ #include #include "lib/global.h" #include "lib/event.h" #include "lib/tty/tty.h" #include "lib/tty/key.h" /* For init_key() */ #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 "vfs/plugins_init.h" #include "events_init.h" #include "args.h" #include "subshell.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 */ #include "main.h" /*** global variables ****************************************************************************/ mc_fhl_t *mc_filehighlight; /* Set when main loop should be terminated */ int quit = 0; #ifdef HAVE_CHARSET /* Numbers of (file I/O) and (input/display) codepages. -1 if not selected */ int default_source_codepage = -1; char *autodetect_codeset = NULL; gboolean is_autodetect_codeset_enabled = FALSE; #endif /* !HAVE_CHARSET */ /* If true use the internal viewer */ int use_internal_view = 1; /* If set, use the builtin editor */ int use_internal_edit = 1; char *mc_run_param0 = NULL; char *mc_run_param1 = NULL; /* The user's shell */ char *shell = NULL; /* The prompt */ const char *mc_prompt = NULL; /* Set to TRUE to suppress printing the last directory */ int print_last_revert = FALSE; /* If set, then print to the given file the last directory we were at */ char *last_wd_string = NULL; /* index to record_macro_buf[], -1 if not recording a macro */ int macro_index = -1; /* macro stuff */ struct macro_action_t record_macro_buf[MAX_MACRO_LENGTH]; GArray *macros_list; /*** 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, "Misc", "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 = getenv ("SHELL"); if ((shell_env == NULL) || (shell_env[0] == '\0')) { struct passwd *pwd; pwd = getpwuid (geteuid ()); if (pwd != NULL) shell = g_strdup (pwd->pw_shell); } else shell = g_strdup (shell_env); if ((shell == NULL) || (shell[0] == '\0')) { g_free (shell); shell = g_strdup ("/bin/sh"); } } /* --------------------------------------------------------------------------------------------- */ 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; sigchld_action.sa_handler = #ifdef HAVE_SUBSHELL_SUPPORT mc_global.tty.use_subshell ? sigchld_handler : #endif /* HAVE_SUBSHELL_SUPPORT */ sigchld_handler_no_subshell; sigemptyset (&sigchld_action.sa_mask); #ifdef SA_RESTART sigchld_action.sa_flags = SA_RESTART; #else sigchld_action.sa_flags = 0; #endif /* !SA_RESTART */ if (sigaction (SIGCHLD, &sigchld_action, NULL) == -1) { #ifdef HAVE_SUBSHELL_SUPPORT /* * 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 /* HAVE_SUBSHELL_SUPPORT */ } } /* --------------------------------------------------------------------------------------------- */ /*** public functions ****************************************************************************/ /* --------------------------------------------------------------------------------------------- */ int do_cd (const char *new_dir, enum cd_enum exact) { gboolean res; res = do_panel_cd (current_panel, new_dir, exact); #if HAVE_CHARSET if (res) { vfs_path_t *vpath = vfs_path_from_str (current_panel->cwd); vfs_path_element_t *path_element = vfs_path_get_by_index (vpath, -1); if (path_element->encoding != NULL) current_panel->codepage = get_codepage_index (path_element->encoding); else current_panel->codepage = SELECT_CHARSET_NO_TRANSLATE; vfs_path_free (vpath); } #endif /* HAVE_CHARSET */ return res ? 1 : 0; } /* --------------------------------------------------------------------------------------------- */ #ifdef HAVE_SUBSHELL_SUPPORT int load_prompt (int fd, void *unused) { (void) fd; (void) unused; if (!read_subshell_prompt ()) return 0; /* Don't actually change the prompt if it's invisible */ if (((Dlg_head *) top_dlg->data == midnight_dlg) && command_prompt) { char *tmp_prompt; int prompt_len; tmp_prompt = strip_ctrl_codes (subshell_prompt); prompt_len = str_term_width1 (tmp_prompt); /* Check for prompts too big */ if (COLS > 8 && prompt_len > COLS - 8) { prompt_len = COLS - 8; tmp_prompt[prompt_len] = '\0'; } mc_prompt = tmp_prompt; label_set_text (the_prompt, mc_prompt); input_set_origin ((WInput *) cmdline, prompt_len, COLS - prompt_len); /* since the prompt has changed, and we are called from one of the * tty_get_event channels, the prompt updating does not take place * automatically: force a cursor update and a screen refresh */ update_cursor (midnight_dlg); mc_refresh (); } update_subshell_prompt = TRUE; return 0; } #endif /* HAVE_SUBSHELL_SUPPORT */ /* --------------------------------------------------------------------------------------------- */ /** Show current directory in the xterm title */ void update_xterm_title_path (void) { /* TODO: share code with midnight_get_title () */ const char *path; char host[BUF_TINY]; char *p; struct passwd *pw = NULL; char *login = NULL; int res = 0; if (mc_global.tty.xterm_flag && xterm_title) { path = strip_home_and_password (current_panel->cwd); res = gethostname (host, sizeof (host)); if (res) { /* On success, res = 0 */ host[0] = '\0'; } else { host[sizeof (host) - 1] = '\0'; } pw = getpwuid (getuid ()); if (pw) { login = g_strdup_printf ("%s@%s", pw->pw_name, host); } else { login = g_strdup (host); } p = g_strdup_printf ("mc [%s]:%s", login, path); fprintf (stdout, "\33]0;%s\7", str_term_form (p)); g_free (login); g_free (p); if (!mc_global.tty.alternate_plus_minus) numeric_keypad_mode (); (void) fflush (stdout); } } /* --------------------------------------------------------------------------------------------- */ int main (int argc, char *argv[]) { GError *error = NULL; gboolean isInitialized; /* We had LC_CTYPE before, LC_ALL includs LC_TYPE as well */ (void) setlocale (LC_ALL, ""); (void) bindtextdomain ("mc", LOCALEDIR); (void) textdomain ("mc"); if (!events_init (&error)) { fprintf (stderr, _("Failed to run:\n%s\n"), error->message); g_error_free (error); (void) mc_event_deinit (NULL); exit (EXIT_FAILURE); } /* Set up temporary directory */ (void) mc_tmpdir (); OS_Setup (); str_init_strings (NULL); /* Initialize and create home directories */ /* do it after the screen library initialization to show the error message */ mc_config_init_config_paths (&error); if (error == NULL && mc_config_deprecated_dir_present ()) mc_config_migrate_from_old_place (&error); vfs_init (); vfs_plugins_init (); vfs_setup_work_dir (); if (!mc_args_handle (argc, argv, "mc")) exit (EXIT_FAILURE); /* 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 HAVE_SUBSHELL_SUPPORT /* 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 /* HAVE_SUBSHELL_SUPPORT */ /* 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); load_setup (); /* 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); { GError *error2 = NULL; isInitialized = mc_skin_init (&error2); mc_filehighlight = mc_fhl_new (TRUE); dlg_set_default_colors (); if (!isInitialized) { message (D_ERROR, _("Warning"), "%s", error2->message); g_error_free (error2); error2 = NULL; } } if (error != NULL) { message (D_ERROR, _("Warning"), "%s", error->message); g_error_free (error); error = NULL; } #ifdef HAVE_SUBSHELL_SUPPORT /* 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 /* HAVE_SUBSHELL_SUPPORT */ /* 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 (); #ifdef HAVE_SUBSHELL_SUPPORT if (mc_global.tty.use_subshell) { mc_prompt = strip_ctrl_codes (subshell_prompt); if (mc_prompt == NULL) mc_prompt = (geteuid () == 0) ? "# " : "$ "; } else #endif /* HAVE_SUBSHELL_SUPPORT */ mc_prompt = (geteuid () == 0) ? "# " : "$ "; /* Program main loop */ if (!mc_global.widget.midnight_shutdown) do_nc (); /* 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_fhl_free (&mc_filehighlight); 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); } } g_free (last_wd_string); g_free (shell); done_key (); if (macros_list != NULL) { guint i; macros_t *macros; for (i = 0; i < macros_list->len; i++) { 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 (); g_free (mc_run_param0); g_free (mc_run_param1); (void) mc_event_deinit (&error); mc_config_deinit_config_paths (); if (error != NULL) { fprintf (stderr, _("\nFailed while close:\n%s\n"), error->message); g_error_free (error); exit (EXIT_FAILURE); } (void) putchar ('\n'); /* Hack to make shell's prompt start at left of screen */ return 0; } /* --------------------------------------------------------------------------------------------- */