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Annotation of 43BSDTahoe/usr.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 the above copyright notice and this paragraph are
                      7:  * duplicated in all such forms and that any documentation,
                      8:  * advertising materials, and other materials related to such
                      9:  * distribution and use acknowledge that the software was developed
                     10:  * by the University of California, Berkeley.  The name of the
                     11:  * University may not be used to endorse or promote products derived
                     12:  * from this software without specific prior written permission.
                     13:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     14:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     15:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     16:  */
                     17: 
                     18: #ifndef lint
                     19: static char sccsid[] = "@(#)tstp.c     5.3 (Berkeley) 6/30/88";
                     20: #endif /* not lint */
                     21: 
                     22: # include      <signal.h>
                     23: 
                     24: # include      "curses.ext"
                     25: 
                     26: /*
                     27:  * handle stop and start signals
                     28:  *
                     29:  * @(#)tstp.c  5.3 (Berkeley) 6/30/88
                     30:  */
                     31: tstp() {
                     32: 
                     33: # ifdef SIGTSTP
                     34: 
                     35:        SGTTY   tty;
                     36:        int     omask;
                     37: # ifdef DEBUG
                     38:        if (outf)
                     39:                fflush(outf);
                     40: # endif
                     41:        tty = _tty;
                     42:        mvcur(0, COLS - 1, LINES - 1, 0);
                     43:        endwin();
                     44:        fflush(stdout);
                     45:        /* reset signal handler so kill below stops us */
                     46:        signal(SIGTSTP, SIG_DFL);
                     47: #define        mask(s) (1 << ((s)-1))
                     48:        omask = sigsetmask(sigblock(0) &~ mask(SIGTSTP));
                     49:        kill(0, SIGTSTP);
                     50:        sigblock(mask(SIGTSTP));
                     51:        signal(SIGTSTP, tstp);
                     52:        _tty = tty;
                     53:        stty(_tty_ch, &_tty);
                     54:        wrefresh(curscr);
                     55: # endif        SIGTSTP
                     56: }

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