void
tty_change_screen_size (void)
{
#if defined(TIOCGWINSZ) && NCURSES_VERSION_MAJOR >= 4
struct winsize winsz;
winsz.ws_col = winsz.ws_row = 0;
#ifndef NCURSES_VERSION
tty_noraw_mode ();
tty_reset_screen ();
#endif
/* Ioctl on the STDIN_FILENO */
ioctl (fileno (stdout), TIOCGWINSZ, &winsz);
if (winsz.ws_col != 0 && winsz.ws_row != 0)
{
#if defined(NCURSES_VERSION) && defined(HAVE_RESIZETERM)
resizeterm (winsz.ws_row, winsz.ws_col);
clearok (stdscr, TRUE); /* sigwinch's should use a semaphore! */
#else
COLS = winsz.ws_col;
LINES = winsz.ws_row;
#endif
}
#endif /* defined(TIOCGWINSZ) || NCURSES_VERSION_MAJOR >= 4 */
#ifdef ENABLE_SUBSHELL
if (mc_global.tty.use_subshell)
tty_resize (mc_global.tty.subshell_pty);
#endif
}
void
tty_change_screen_size (void)
{
SLtt_get_screen_size ();
SLsmg_reinit_smg ();
#ifdef ENABLE_SUBSHELL
if (mc_global.tty.use_subshell)
tty_resize (mc_global.tty.subshell_pty);
#endif
}
static void
init_subshell_child (const char *pty_name)
{
char *init_file = NULL;
pid_t mc_sid;
(void) pty_name;
setsid (); /* Get a fresh terminal session */
/* Make sure that it has become our controlling terminal */
/* Redundant on Linux and probably most systems, but just in case: */
#ifdef TIOCSCTTY
ioctl (subshell_pty_slave, TIOCSCTTY, 0);
#endif
/* Configure its terminal modes and window size */
/* Set up the pty with the same termios flags as our own tty */
if (tcsetattr (subshell_pty_slave, TCSANOW, &shell_mode))
{
fprintf (stderr, "Cannot set pty terminal modes: %s\r\n", unix_error_string (errno));
my_exit (FORK_FAILURE);
}
/* Set the pty's size (80x25 by default on Linux) according to the */
/* size of the real terminal as calculated by ncurses, if possible */
tty_resize (subshell_pty_slave);
/* Set up the subshell's environment and init file name */
/* It simplifies things to change to our home directory here, */
/* and the user's startup file may do a 'cd' command anyway */
{
int ret;
ret = chdir (mc_config_get_home_dir ()); /* FIXME? What about when we re-run the subshell? */
(void) ret;
}
/* Set MC_SID to prevent running one mc from another */
mc_sid = getsid (0);
if (mc_sid != -1)
{
char sid_str[BUF_SMALL];
g_snprintf (sid_str, sizeof (sid_str), "MC_SID=%ld", (long) mc_sid);
putenv (g_strdup (sid_str));
}
switch (subshell_type)
{
case BASH:
init_file = mc_config_get_full_path ("bashrc");
if (access (init_file, R_OK) == -1)
{
g_free (init_file);
init_file = g_strdup (".bashrc");
}
/* Make MC's special commands not show up in bash's history */
putenv ((char *) "HISTCONTROL=ignorespace");
/* Allow alternative readline settings for MC */
{
char *input_file = mc_config_get_full_path ("inputrc");
if (access (input_file, R_OK) == 0)
{
char *putenv_str = g_strconcat ("INPUTRC=", input_file, NULL);
putenv (putenv_str);
g_free (putenv_str);
}
g_free (input_file);
}
break;
/* TODO: Find a way to pass initfile to TCSH and ZSH */
case TCSH:
case ZSH:
case FISH:
break;
default:
fprintf (stderr, __FILE__ ": unimplemented subshell type %d\r\n", subshell_type);
my_exit (FORK_FAILURE);
}
/* Attach all our standard file descriptors to the pty */
/* This is done just before the fork, because stderr must still */
/* be connected to the real tty during the above error messages; */
/* otherwise the user will never see them. */
dup2 (subshell_pty_slave, STDIN_FILENO);
dup2 (subshell_pty_slave, STDOUT_FILENO);
dup2 (subshell_pty_slave, STDERR_FILENO);
close (subshell_pipe[READ]);
close (subshell_pty_slave); /* These may be FD_CLOEXEC, but just in case... */
/* Close master side of pty. This is important; apart from */
/* freeing up the descriptor for use in the subshell, it also */
/* means that when MC exits, the subshell will get a SIGHUP and */
/* exit too, because there will be no more descriptors pointing */
/* at the master side of the pty and so it will disappear. */
close (mc_global.tty.subshell_pty);
/* Execute the subshell at last */
switch (subshell_type)
{
case BASH:
execl (mc_global.tty.shell, "bash", "-rcfile", init_file, (char *) NULL);
break;
case TCSH:
execl (mc_global.tty.shell, "tcsh", (char *) NULL);
break;
case ZSH:
/* Use -g to exclude cmds beginning with space from history
* and -Z to use the line editor on non-interactive term */
execl (mc_global.tty.shell, "zsh", "-Z", "-g", (char *) NULL);
break;
case FISH:
execl (mc_global.tty.shell, "fish", (char *) NULL);
break;
}
/* If we get this far, everything failed miserably */
g_free (init_file);
my_exit (FORK_FAILURE);
}