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/* This work is copyrighted. See COPYRIGHT.OLD & COPYRIGHT.NEW for *
* details. If they are missing then this copy is in violation of *
* the copyright conditions. */
/*
** lib_tstp.c
**
** The routine tstp().
**
*/
#include "curses.priv.h"
#include "terminfo.h"
#ifdef SVR4_ACTION
#define _POSIX_SOURCE
#endif
#include <signal.h>
void tstp(int dummy)
{
sigaction_t act, oact;
sigset_t mask, omask;
T(("tstp() called"));
/*
* The user may have changed the prog_mode tty bits, so save them.
*/
def_prog_mode();
/*
* Block window change and timer signals. The latter
* is because applications use timers to decide when
* to repaint the screen.
*/
(void)sigemptyset(&mask);
(void)sigaddset(&mask, SIGALRM);
#ifdef SIGWINCH
(void)sigaddset(&mask, SIGWINCH);
#endif
(void)sigprocmask(SIG_BLOCK, &mask, &omask);
endwin();
sigemptyset(&mask);
sigaddset(&mask, SIGTSTP);
sigprocmask(SIG_UNBLOCK, &mask, NULL);
act.sa_handler = SIG_DFL;
sigemptyset(&act.sa_mask);
act.sa_flags = 0;
#ifdef SA_RESTART
act.sa_flags |= SA_RESTART;
#endif
sigaction(SIGTSTP, &act, &oact);
kill(getpid(), SIGTSTP);
T(("SIGCONT received"));
sigaction(SIGTSTP, &oact, NULL);
flushinp();
/*
* If the user modified the tty state while suspended, he wants
* those changes to stick. So save the new "default" terminal state.
*/
def_shell_mode();
/*
* This relies on the fact that doupdate() will restore the
* program-mode tty state, and issue enter_ca_mode if need be.
*/
doupdate();
/* Reset the signals. */
(void)sigprocmask(SIG_SETMASK, &omask, NULL);
}
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