2.11BSD#431 - /usr/src/usr.lib/libcurses/tstp.c

   1: /*
   2:  * Copyright (c) 1980 Regents of the University of California.
   3:  * All rights reserved.  The Berkeley software License Agreement
   4:  * specifies the terms and conditions for redistribution.
   5:  */
   6: 
   7: #if !defined(lint) && !defined(NOSCCS)
   8: static char sccsid[] = "@(#)tstp.c	5.1.1 (2.11BSD) 1999/10/24";
   9: #endif
  10: 
  11: #include    <signal.h>
  12: #include    "curses.ext"
  13: 
  14: /*
  15:  * handle stop and start signals
  16:  */
  17: tstp() {
  18:     SGTTY   tty;
  19:     sigset_t oset, set;
  20: #ifdef DEBUG
  21:     if (outf)
  22:         fflush(outf);
  23: #endif
  24:     /*
  25: 	 * Block window change and timer signals.  The latter is because
  26: 	 * applications use timers to decide when to repaint the screen.
  27: 	 */
  28:     (void)sigemptyset(&set);
  29:     (void)sigaddset(&set, SIGALRM);
  30:     (void)sigaddset(&set, SIGWINCH);
  31:     (void)sigprocmask(SIG_BLOCK, &set, &oset);
  32: 
  33:     tty = _tty;
  34:     mvcur(0, COLS - 1, LINES - 1, 0);
  35:     endwin();
  36:     fflush(stdout);
  37: 
  38:     /* Unblock SIGTSTP. */
  39:     (void)sigemptyset(&set);
  40:     (void)sigaddset(&set, SIGTSTP);
  41:     (void)sigprocmask(SIG_UNBLOCK, &set, NULL);
  42: 
  43:     /* Stop ourselves. */
  44:     signal(SIGTSTP, SIG_DFL);
  45:     kill(0, SIGTSTP);
  46: 
  47:     /* Time passes ... */
  48: 
  49:     /* Reset the SIGTSTP handler. */
  50:     signal(SIGTSTP, tstp);
  51: 
  52:     _tty = tty;
  53:     stty(_tty_ch, &_tty);
  54: 
  55:     /* Repaint the screen. */
  56:     wrefresh(curscr);
  57: 
  58:     /* Reset the signals. */
  59:     (void)sigprocmask(SIG_SETMASK, &oset, NULL);
  60: }

Defined functions

Defined variables