Adding upstream version 3:4.8.29.upstream/3%4.8.29upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 553 insertions, 0 deletions

diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..3a33dfb
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,553 @@
+/*
+   Main program for the Midnight Commander
+
+   Copyright (C) 1994-2022
+   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/types.h>
+#include <sys/wait.h>
+#include <signal.h>
+#include <unistd.h>             /* getsid() */
+
+#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 "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 */
+
+/*** 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_global.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 *datadir_env;
+
+    mc_shell_init ();
+
+    /* 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 */
+    }
+}
+
+/* --------------------------------------------------------------------------------------------- */
+/**
+ * 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[])
+{
+    GError *mcerror = NULL;
+    int exit_code = EXIT_FAILURE;
+
+    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;
+    }
+
+    /* 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 */
+    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;
+    }
+
+    /* 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);
+    }
+
+    /* 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_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
+    /* 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 */
+
+    /* 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 ();
+
+    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 */
+
+    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 ();
+
+        /* 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) ? "# " : "$ ";
+    }
+
+    /* 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 ();
+
+    /* 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);
+
+    mc_shell_deinit ();
+
+    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);
+    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;
+    }
+
+    (void) putchar ('\n');      /* Hack to make shell's prompt start at left of screen */
+
+    return exit_code;
+}
+
+/* --------------------------------------------------------------------------------------------- */