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- /*
- Execution routines for GNU Midnight Commander
- Copyright (C) 2003, 2004, 2005, 2007, 2011
- The Free Software Foundation, Inc.
- 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 execute.c
- * \brief Source: execution routines
- */
- #include <config.h>
- #include <signal.h>
- #include <sys/stat.h>
- #include <sys/time.h>
- #include "lib/global.h"
- #include "lib/tty/tty.h"
- #include "lib/tty/key.h"
- #include "lib/tty/win.h"
- #include "lib/vfs/vfs.h"
- #include "lib/mcconfig.h"
- #include "lib/util.h"
- #include "lib/widget.h"
- #include "filemanager/midnight.h"
- #include "filemanager/layout.h" /* use_dash() */
- #include "consaver/cons.saver.h"
- #include "subshell.h"
- #include "setup.h" /* clear_before_exec */
- #include "execute.h"
- /*** global variables ****************************************************************************/
- int pause_after_run = pause_on_dumb_terminals;
- /*** file scope macro definitions ****************************************************************/
- /*** file scope type declarations ****************************************************************/
- /*** file scope variables ************************************************************************/
- /*** file scope functions ************************************************************************/
- /* --------------------------------------------------------------------------------------------- */
- static void
- edition_post_exec (void)
- {
- do_enter_ca_mode ();
- /* FIXME: Missing on slang endwin? */
- tty_reset_prog_mode ();
- tty_flush_input ();
- tty_keypad (TRUE);
- tty_raw_mode ();
- channels_up ();
- enable_mouse ();
- if (mc_global.tty.alternate_plus_minus)
- application_keypad_mode ();
- }
- /* --------------------------------------------------------------------------------------------- */
- static void
- edition_pre_exec (void)
- {
- if (clear_before_exec)
- clr_scr ();
- else
- {
- if (!(mc_global.tty.console_flag != '\0' || mc_global.tty.xterm_flag))
- printf ("\n\n");
- }
- channels_down ();
- disable_mouse ();
- tty_reset_shell_mode ();
- tty_keypad (FALSE);
- tty_reset_screen ();
- numeric_keypad_mode ();
- /* on xterms: maybe endwin did not leave the terminal on the shell
- * screen page: do it now.
- *
- * Do not move this before endwin: in some systems rmcup includes
- * a call to clear screen, so it will end up clearing the shell screen.
- */
- do_exit_ca_mode ();
- }
- /* --------------------------------------------------------------------------------------------- */
- #ifdef HAVE_SUBSHELL_SUPPORT
- static void
- do_possible_cd (const vfs_path_t * new_dir_vpath)
- {
- if (!do_cd (new_dir_vpath, cd_exact))
- message (D_ERROR, _("Warning"),
- _("The Commander can't change to the directory that\n"
- "the subshell claims you are in. Perhaps you have\n"
- "deleted your working directory, or given yourself\n"
- "extra access permissions with the \"su\" command?"));
- }
- #endif /* HAVE_SUBSHELL_SUPPORT */
- /* --------------------------------------------------------------------------------------------- */
- static void
- do_execute (const char *lc_shell, const char *command, int flags)
- {
- #ifdef HAVE_SUBSHELL_SUPPORT
- vfs_path_t *new_dir_vpath = NULL;
- #endif /* HAVE_SUBSHELL_SUPPORT */
- vfs_path_t *old_vfs_dir_vpath = NULL;
- if (!vfs_current_is_local ())
- old_vfs_dir_vpath = vfs_path_clone (vfs_get_raw_current_dir ());
- if (mc_global.mc_run_mode == MC_RUN_FULL)
- save_cwds_stat ();
- pre_exec ();
- if (mc_global.tty.console_flag != '\0')
- handle_console (CONSOLE_RESTORE);
- if (!mc_global.tty.use_subshell && command && !(flags & EXECUTE_INTERNAL))
- {
- printf ("%s%s\n", mc_prompt, command);
- fflush (stdout);
- }
- #ifdef HAVE_SUBSHELL_SUPPORT
- if (mc_global.tty.use_subshell && !(flags & EXECUTE_INTERNAL))
- {
- do_update_prompt ();
- /* We don't care if it died, higher level takes care of this */
- invoke_subshell (command, VISIBLY, old_vfs_dir_vpath != NULL ? NULL : &new_dir_vpath);
- }
- else
- #endif /* HAVE_SUBSHELL_SUPPORT */
- my_system (flags, lc_shell, command);
- if (!(flags & EXECUTE_INTERNAL))
- {
- if ((pause_after_run == pause_always
- || (pause_after_run == pause_on_dumb_terminals && !mc_global.tty.xterm_flag
- && mc_global.tty.console_flag == '\0')) && quit == 0
- #ifdef HAVE_SUBSHELL_SUPPORT
- && subshell_state != RUNNING_COMMAND
- #endif /* HAVE_SUBSHELL_SUPPORT */
- )
- {
- printf (_("Press any key to continue..."));
- fflush (stdout);
- tty_raw_mode ();
- get_key_code (0);
- printf ("\r\n");
- fflush (stdout);
- }
- if (mc_global.tty.console_flag != '\0')
- {
- if (output_lines && mc_global.keybar_visible)
- {
- putchar ('\n');
- fflush (stdout);
- }
- }
- }
- if (mc_global.tty.console_flag != '\0')
- handle_console (CONSOLE_SAVE);
- edition_post_exec ();
- #ifdef HAVE_SUBSHELL_SUPPORT
- if (new_dir_vpath != NULL)
- {
- do_possible_cd (new_dir_vpath);
- vfs_path_free (new_dir_vpath);
- }
- #endif /* HAVE_SUBSHELL_SUPPORT */
- if (old_vfs_dir_vpath != NULL)
- {
- mc_chdir (old_vfs_dir_vpath);
- vfs_path_free (old_vfs_dir_vpath);
- }
- if (mc_global.mc_run_mode == MC_RUN_FULL)
- {
- update_panels (UP_OPTIMIZE, UP_KEEPSEL);
- update_xterm_title_path ();
- }
- do_refresh ();
- use_dash (TRUE);
- }
- /* --------------------------------------------------------------------------------------------- */
- static void
- do_suspend_cmd (void)
- {
- pre_exec ();
- if (mc_global.tty.console_flag != '\0' && !mc_global.tty.use_subshell)
- handle_console (CONSOLE_RESTORE);
- #ifdef SIGTSTP
- {
- struct sigaction sigtstp_action;
- /* Make sure that the SIGTSTP below will suspend us directly,
- without calling ncurses' SIGTSTP handler; we *don't* want
- ncurses to redraw the screen immediately after the SIGCONT */
- sigaction (SIGTSTP, &startup_handler, &sigtstp_action);
- kill (getpid (), SIGTSTP);
- /* Restore previous SIGTSTP action */
- sigaction (SIGTSTP, &sigtstp_action, NULL);
- }
- #endif /* SIGTSTP */
- if (mc_global.tty.console_flag != '\0' && !mc_global.tty.use_subshell)
- handle_console (CONSOLE_SAVE);
- edition_post_exec ();
- }
- /* --------------------------------------------------------------------------------------------- */
- /*** public functions ****************************************************************************/
- /* --------------------------------------------------------------------------------------------- */
- /** Set up the terminal before executing a program */
- void
- pre_exec (void)
- {
- use_dash (FALSE);
- edition_pre_exec ();
- }
- /* --------------------------------------------------------------------------------------------- */
- /** Hide the terminal after executing a program */
- void
- post_exec (void)
- {
- edition_post_exec ();
- use_dash (TRUE);
- repaint_screen ();
- }
- /* --------------------------------------------------------------------------------------------- */
- /* Executes a command */
- void
- shell_execute (const char *command, int flags)
- {
- char *cmd = NULL;
- if (flags & EXECUTE_HIDE)
- {
- cmd = g_strconcat (" ", command, (char *) NULL);
- flags ^= EXECUTE_HIDE;
- }
- #ifdef HAVE_SUBSHELL_SUPPORT
- if (mc_global.tty.use_subshell)
- if (subshell_state == INACTIVE)
- do_execute (shell, cmd ? cmd : command, flags | EXECUTE_AS_SHELL);
- else
- message (D_ERROR, MSG_ERROR, _("The shell is already running a command"));
- else
- #endif /* HAVE_SUBSHELL_SUPPORT */
- do_execute (shell, cmd ? cmd : command, flags | EXECUTE_AS_SHELL);
- g_free (cmd);
- }
- /* --------------------------------------------------------------------------------------------- */
- void
- exec_shell (void)
- {
- do_execute (shell, 0, 0);
- }
- /* --------------------------------------------------------------------------------------------- */
- void
- toggle_panels (void)
- {
- #ifdef HAVE_SUBSHELL_SUPPORT
- vfs_path_t *new_dir_vpath = NULL;
- vfs_path_t **new_dir_p;
- #endif /* HAVE_SUBSHELL_SUPPORT */
- channels_down ();
- disable_mouse ();
- if (clear_before_exec)
- clr_scr ();
- if (mc_global.tty.alternate_plus_minus)
- numeric_keypad_mode ();
- #ifndef HAVE_SLANG
- /* With slang we don't want any of this, since there
- * is no raw_mode supported
- */
- tty_reset_shell_mode ();
- #endif /* !HAVE_SLANG */
- tty_noecho ();
- tty_keypad (FALSE);
- tty_reset_screen ();
- do_exit_ca_mode ();
- tty_raw_mode ();
- if (mc_global.tty.console_flag != '\0')
- handle_console (CONSOLE_RESTORE);
- #ifdef HAVE_SUBSHELL_SUPPORT
- if (mc_global.tty.use_subshell)
- {
- new_dir_p = vfs_current_is_local () ? &new_dir_vpath : NULL;
- invoke_subshell (NULL, VISIBLY, new_dir_p);
- }
- else
- #endif /* HAVE_SUBSHELL_SUPPORT */
- {
- if (output_starts_shell)
- {
- fprintf (stderr, _("Type `exit' to return to the Midnight Commander"));
- fprintf (stderr, "\n\r\n\r");
- my_system (EXECUTE_INTERNAL, shell, NULL);
- }
- else
- get_key_code (0);
- }
- if (mc_global.tty.console_flag != '\0')
- handle_console (CONSOLE_SAVE);
- do_enter_ca_mode ();
- tty_reset_prog_mode ();
- tty_keypad (TRUE);
- /* Prevent screen flash when user did 'exit' or 'logout' within
- subshell */
- if ((quit & SUBSHELL_EXIT) != 0)
- {
- /* User did `exit' or `logout': quit MC */
- if (quiet_quit_cmd ())
- return;
- quit = 0;
- #ifdef HAVE_SUBSHELL_SUPPORT
- /* restart subshell */
- if (mc_global.tty.use_subshell)
- init_subshell ();
- #endif /* HAVE_SUBSHELL_SUPPORT */
- }
- enable_mouse ();
- channels_up ();
- if (mc_global.tty.alternate_plus_minus)
- application_keypad_mode ();
- #ifdef HAVE_SUBSHELL_SUPPORT
- if (mc_global.tty.use_subshell)
- {
- do_load_prompt ();
- if (new_dir_vpath != NULL)
- do_possible_cd (new_dir_vpath);
- if (mc_global.tty.console_flag != '\0' && output_lines)
- show_console_contents (output_start_y,
- LINES - mc_global.keybar_visible - output_lines -
- 1, LINES - mc_global.keybar_visible - 1);
- }
- vfs_path_free (new_dir_vpath);
- #endif /* HAVE_SUBSHELL_SUPPORT */
- if (mc_global.mc_run_mode == MC_RUN_FULL)
- {
- update_panels (UP_OPTIMIZE, UP_KEEPSEL);
- update_xterm_title_path ();
- }
- repaint_screen ();
- }
- /* --------------------------------------------------------------------------------------------- */
- /* event callback */
- gboolean
- execute_suspend (const gchar * event_group_name, const gchar * event_name,
- gpointer init_data, gpointer data)
- {
- (void) event_group_name;
- (void) event_name;
- (void) init_data;
- (void) data;
- if (mc_global.mc_run_mode == MC_RUN_FULL)
- save_cwds_stat ();
- do_suspend_cmd ();
- if (mc_global.mc_run_mode == MC_RUN_FULL)
- update_panels (UP_OPTIMIZE, UP_KEEPSEL);
- do_refresh ();
- return TRUE;
- }
- /* --------------------------------------------------------------------------------------------- */
- /**
- * Execute command on a filename that can be on VFS.
- * Errors are reported to the user.
- */
- void
- execute_with_vfs_arg (const char *command, const vfs_path_t * filename_vpath)
- {
- struct stat st;
- time_t mtime;
- vfs_path_t *localcopy_vpath;
- /* Simplest case, this file is local */
- if (filename_vpath == NULL || vfs_file_is_local (filename_vpath))
- {
- do_execute (command, vfs_path_get_last_path_str (filename_vpath), EXECUTE_INTERNAL);
- return;
- }
- /* FIXME: Creation of new files on VFS is not supported */
- if (vfs_path_len (filename_vpath) == 0)
- return;
- localcopy_vpath = mc_getlocalcopy (filename_vpath);
- if (localcopy_vpath == NULL)
- {
- char *filename;
- filename = vfs_path_to_str (filename_vpath);
- message (D_ERROR, MSG_ERROR, _("Cannot fetch a local copy of %s"), filename);
- g_free (filename);
- return;
- }
- /*
- * filename can be an entry on panel, it can be changed by executing
- * the command, so make a copy. Smarter VFS code would make the code
- * below unnecessary.
- */
- mc_stat (localcopy_vpath, &st);
- mtime = st.st_mtime;
- do_execute (command, vfs_path_get_last_path_str (localcopy_vpath), EXECUTE_INTERNAL);
- mc_stat (localcopy_vpath, &st);
- mc_ungetlocalcopy (filename_vpath, localcopy_vpath, mtime != st.st_mtime);
- vfs_path_free (localcopy_vpath);
- }
- /* --------------------------------------------------------------------------------------------- */
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