mirror of
https://github.com/GnoConsortium/gno.git
synced 2024-12-30 04:33:01 +00:00
129 lines
3.6 KiB
C
129 lines
3.6 KiB
C
/*
|
|
* Copyright (c) 1981, 1993, 1994
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static char sccsid[] = "@(#)tstp.c 8.3 (Berkeley) 5/4/94";
|
|
#endif /* not lint */
|
|
|
|
#include <errno.h>
|
|
#include <signal.h>
|
|
#include <termios.h>
|
|
#include <unistd.h>
|
|
|
|
#include "curses.h"
|
|
|
|
/*
|
|
* stop_signal_handler --
|
|
* Handle stop signals.
|
|
*/
|
|
void
|
|
__stop_signal_handler(signo)
|
|
int signo;
|
|
{
|
|
struct termios save;
|
|
sigset_t oset, set;
|
|
|
|
/* Get the current terminal state (which the user may have changed). */
|
|
if (tcgetattr(__tty_fileno, &save))
|
|
return;
|
|
|
|
/*
|
|
* Block window change and timer signals. The latter is because
|
|
* applications use timers to decide when to repaint the screen.
|
|
*/
|
|
(void)sigemptyset(&set);
|
|
(void)sigaddset(&set, SIGALRM);
|
|
(void)sigaddset(&set, SIGWINCH);
|
|
(void)sigprocmask(SIG_BLOCK, &set, &oset);
|
|
|
|
/*
|
|
* End the window, which also resets the terminal state to the
|
|
* original modes.
|
|
*/
|
|
endwin();
|
|
|
|
/* Unblock SIGTSTP. */
|
|
(void)sigemptyset(&set);
|
|
(void)sigaddset(&set, SIGTSTP);
|
|
(void)sigprocmask(SIG_UNBLOCK, &set, NULL);
|
|
|
|
/* Stop ourselves. */
|
|
__restore_stophandler();
|
|
(void)kill(0, SIGTSTP);
|
|
|
|
/* Time passes ... */
|
|
|
|
/* Reset the curses SIGTSTP signal handler. */
|
|
__set_stophandler();
|
|
|
|
/* save the new "default" terminal state */
|
|
(void)tcgetattr(__tty_fileno, &__orig_termios);
|
|
|
|
/* Reset the terminal state to the mode just before we stopped. */
|
|
(void)tcsetattr(__tty_fileno, __tcaction ?
|
|
TCSASOFT | TCSADRAIN : TCSADRAIN, &save);
|
|
|
|
/* Restart the screen. */
|
|
__startwin();
|
|
|
|
/* Repaint the screen. */
|
|
wrefresh(curscr);
|
|
|
|
/* Reset the signals. */
|
|
(void)sigprocmask(SIG_SETMASK, &oset, NULL);
|
|
}
|
|
|
|
static void (*otstpfn)() = SIG_DFL;
|
|
|
|
/*
|
|
* Set the TSTP handler.
|
|
*/
|
|
void
|
|
__set_stophandler()
|
|
{
|
|
otstpfn = signal(SIGTSTP, __stop_signal_handler);
|
|
}
|
|
|
|
/*
|
|
* Restore the TSTP handler.
|
|
*/
|
|
void
|
|
__restore_stophandler()
|
|
{
|
|
(void)signal(SIGTSTP, otstpfn);
|
|
}
|
|
|
|
/* For compatibility */
|
|
|
|
void tstp() { __stop_signal_handler(SIGTSTP); }
|