static void
save_external_state (struct terminal_state_recording * s)
{
(s -> recorded_p) =
(scheme_in_foreground
&& (isatty (s -> fd))
&& ((get_terminal_state ((s -> fd), (& (s -> state)))) >= 0)
&& ((get_flags ((s -> fd), (& (s -> flags)))) >= 0));
}
void
save_internal_state (struct terminal_state_recording * s,
struct terminal_state_recording * es)
{
/* Don't do anything unless we have a recording of the external
state. Otherwise, we should preserve the previous recording of
the internal state, if any. */
if (es -> recorded_p)
(s -> recorded_p) =
(((get_terminal_state ((s -> fd), (& (s -> state)))) >= 0)
&& ((get_flags ((s -> fd), (& (s -> flags)))) >= 0));
}
static void
ctty_set_interrupt_chars (Tinterrupt_chars * ic)
{
Ttty_state s;
if ((get_terminal_state (ctty_fildes, (&s))) == 0)
{
#ifdef HAVE_TERMIOS_H
((s . tio . c_cc) [VQUIT]) = (ic -> quit);
((s . tio . c_cc) [VINTR]) = (ic -> intrpt);
((s . tio . c_cc) [VSUSP]) = (ic -> tstp);
#ifdef VDSUSP
((s . tio . c_cc) [VDSUSP]) = (ic -> dtstp);
#else /* not VDSUSP */
#ifdef __HPUX__
(s . ltc . t_suspc) = (ic -> tstp);
(s . ltc . t_dsuspc) = (ic -> dtstp);
#endif /* __HPUX__ */
#endif /* not VDSUSP */
#else /* not HAVE_TERMIOS_H */
#ifdef HAVE_TERMIO_H
((s . tio . c_cc) [VQUIT]) = (ic -> quit);
((s . tio . c_cc) [VINTR]) = (ic -> intrpt);
#ifdef HAVE_STRUCT_LTCHARS
(s . ltc . t_suspc) = (ic -> tstp);
(s . ltc . t_dsuspc) = (ic -> dtstp);
#endif
#else /* not HAVE_TERMIO_H */
#ifdef HAVE_SGTTY_H
(s . tc . t_quitc) = (ic -> quit);
(s . tc . t_intrc) = (ic -> intrpt);
#ifdef HAVE_STRUCT_LTCHARS
(s . ltc . t_suspc) = (ic -> tstp);
(s . ltc . t_dsuspc) = (ic -> dtstp);
#endif
#endif /* HAVE_SGTTY_H */
#endif /* HAVE_TERMIO_H */
#endif /* HAVE_TERMIOS_H */
set_terminal_state (ctty_fildes, (&s));
}
}
int steal_pty(pid_t pid, int *pty) {
int err = 0;
struct steal_pty_state steal = {};
long page_size = sysconf(_SC_PAGE_SIZE);
if ((err = preflight_check(pid)))
goto out;
if ((err = get_terminal_state(&steal, pid)))
goto out;
if ((err = setup_steal_socket(&steal)))
goto out;
debug("Listening on socket: %s", steal.addr_un.sun_path);
debug("Attaching terminal emulator pid=%d", steal.emulator_pid);
if ((err = grab_pid(steal.emulator_pid, &steal.child, &steal.child_scratch)))
goto out;
debug("Attached to terminal emulator (pid %d)",
(int)steal.emulator_pid);
if ((err = find_master_fd(&steal))) {
error("Unable to find the fd for the pty!");
goto out;
}
if ((err = setup_steal_socket_child(&steal)))
goto out;
if ((err = steal_child_pty(&steal)))
goto out;
if ((err = steal_block_hup(&steal)))
goto out;
if ((err = steal_cleanup_child(&steal)))
goto out;
goto out_no_child;
out:
if (steal.ptyfd) {
close(steal.ptyfd);
steal.ptyfd = 0;
}
if (steal.child_fd > 0)
do_syscall(&steal.child, close, steal.child_fd, 0, 0, 0, 0, 0);
if (steal.child_scratch > 0)
do_unmap(&steal.child, steal.child_scratch, page_size);
if (steal.child.state != ptrace_detached) {
ptrace_restore_regs(&steal.child);
ptrace_detach_child(&steal.child);
}
out_no_child:
if (steal.sockfd > 0) {
close(steal.sockfd);
unlink(steal.addr_un.sun_path);
}
if (steal.tmpdir[0]) {
rmdir(steal.tmpdir);
}
if (steal.ptyfd)
*pty = steal.ptyfd;
free(steal.master_fds.fds);
return err;
}
/* not currently used */
static void
ctty_get_interrupt_chars (Tinterrupt_chars * ic)
{
Ttty_state s;
if ((get_terminal_state (ctty_fildes, (&s))) == 0)
{
#ifdef HAVE_TERMIOS_H
(ic -> quit) = ((s . tio . c_cc) [VQUIT]);
(ic -> intrpt) = ((s . tio . c_cc) [VINTR]);
(ic -> tstp) = ((s . tio . c_cc) [VSUSP]);
#ifdef VDSUSP
(ic -> dtstp) = ((s . tio . c_cc) [VDSUSP]);
#else /* not VDSUSP */
#ifdef __HPUX__
(ic -> dtstp) = (s . ltc . t_dsuspc);
#endif /* __HPUX__ */
#endif /* not VDSUSP */
#else /* not HAVE_TERMIOS_H */
#ifdef HAVE_TERMIO_H
(ic -> quit) = ((s . tio . c_cc) [VQUIT]);
(ic -> intrpt) = ((s . tio . c_cc) [VINTR]);
#ifdef HAVE_STRUCT_LTCHARS
(ic -> tstp) = (s . ltc . t_suspc);
(ic -> dtstp) = (s . ltc . t_dsuspc);
#else /* not HAVE_STRUCT_LTCHARS */
{
cc_t disabled_char = (UX_PC_VDISABLE (ctty_fildes));
(ic -> tstp) = disabled_char;
(ic -> dtstp) = disabled_char;
}
#endif /* not HAVE_STRUCT_LTCHARS */
#else /* not HAVE_TERMIO_H */
#ifdef HAVE_SGTTY_H
(ic -> quit) = (s . tc . t_quitc);
(ic -> intrpt) = (s . tc . t_intrc);
#ifdef HAVE_STRUCT_LTCHARS
(ic -> tstp) = (s . ltc . t_suspc);
(ic -> dtstp) = (s . ltc . t_dsuspc);
#else /* not HAVE_STRUCT_LTCHARS */
{
cc_t disabled_char = (UX_PC_VDISABLE (ctty_fildes));
(ic -> tstp) = disabled_char;
(ic -> dtstp) = disabled_char;
}
#endif /* not HAVE_STRUCT_LTCHARS */
#endif /* HAVE_SGTTY_H */
#endif /* HAVE_TERMIO_H */
#endif /* HAVE_TERMIOS_H */
}
else
{
cc_t disabled_char = (UX_PC_VDISABLE (ctty_fildes));
(ic -> quit) = disabled_char;
(ic -> intrpt) = disabled_char;
(ic -> tstp) = disabled_char;
(ic -> dtstp) = disabled_char;
}
}
