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Annotation of 43BSDReno/lib/libcurses/tstp.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1981 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms are permitted
        !             6:  * provided that: (1) source distributions retain this entire copyright
        !             7:  * notice and comment, and (2) distributions including binaries display
        !             8:  * the following acknowledgement:  ``This product includes software
        !             9:  * developed by the University of California, Berkeley and its contributors''
        !            10:  * in the documentation or other materials provided with the distribution
        !            11:  * and in all advertising materials mentioning features or use of this
        !            12:  * software. Neither the name of the University nor the names of its
        !            13:  * contributors may be used to endorse or promote products derived
        !            14:  * from this software without specific prior written permission.
        !            15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            18:  */
        !            19: 
        !            20: #ifndef lint
        !            21: static char sccsid[] = "@(#)tstp.c     5.5 (Berkeley) 6/1/90";
        !            22: #endif /* not lint */
        !            23: 
        !            24: # include      <signal.h>
        !            25: 
        !            26: # include      "curses.ext"
        !            27: 
        !            28: /*
        !            29:  * handle stop and start signals
        !            30:  *
        !            31:  * @(#)tstp.c  5.5 (Berkeley) 6/1/90
        !            32:  */
        !            33: tstp() {
        !            34: 
        !            35: # ifdef SIGTSTP
        !            36: 
        !            37:        SGTTY   tty;
        !            38:        int     omask;
        !            39: # ifdef DEBUG
        !            40:        if (outf)
        !            41:                fflush(outf);
        !            42: # endif
        !            43:        tty = _tty;
        !            44:        mvcur(0, COLS - 1, LINES - 1, 0);
        !            45:        endwin();
        !            46:        fflush(stdout);
        !            47:        /* reset signal handler so kill below stops us */
        !            48:        signal(SIGTSTP, SIG_DFL);
        !            49: #define        mask(s) (1 << ((s)-1))
        !            50:        omask = sigsetmask(sigblock(0) &~ mask(SIGTSTP));
        !            51:        kill(0, SIGTSTP);
        !            52:        sigblock(mask(SIGTSTP));
        !            53:        signal(SIGTSTP, tstp);
        !            54:        _tty = tty;
        !            55:        ioctl(_tty_ch, TIOCSETP, &_tty);
        !            56:        wrefresh(curscr);
        !            57: # endif        SIGTSTP
        !            58: }

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