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Annotation of 43BSDReno/lib/libcurses/tstp.c, revision 1.1.1.1

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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