usr/src/lib/libcurses/screen/tstp.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 1997 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*      Copyright (c) 1988 AT&T */
  28 /*        All Rights Reserved   */
  29
  30 /*
  31  * University Copyright- Copyright (c) 1982, 1986, 1988
  32  * The Regents of the University of California
  33  * All Rights Reserved
  34  *
  35  * University Acknowledgment- Portions of this document are derived from
  36  * software developed by the University of California, Berkeley, and its
  37  * contributors.
  38  */
  39
  40 #pragma ident   "%Z%%M% %I%     %E% SMI"
  41
  42 /*LINTLIBRARY*/
  43
  44 #include        <sys/types.h>
  45 #include        <stdlib.h>
  46 #include        <signal.h>
  47 #include        "curses_inc.h"
  48
  49
  50 /* handle stop and start signals */
  51
  52 #ifdef  SIGTSTP
  53 void
  54 _tstp(int dummy)
  55 {
  56 #ifdef  DEBUG
  57         if (outf)
  58                 (void) fflush(outf);
  59 #endif  /* DEBUG */
  60         curscr->_attrs = A_ATTRIBUTES;
  61         (void) endwin();
  62         (void) fflush(stdout);
  63         (void) kill(0, SIGTSTP);
  64         (void) signal(SIGTSTP, _tstp);
  65         (void) fixterm();
  66         /* changed ehr3 SP->doclear = 1; */
  67         curscr->_clear = TRUE;
  68         (void) wrefresh(curscr);
  69 }
  70 #endif  /* SIGTSTP */
  71
  72 void
  73 _ccleanup(int signo)
  74 {
  75         (void) signal(signo, SIG_IGN);
  76
  77         /*
  78          * Fake curses into thinking that all attributes are on so that
  79          * endwin will turn them off since the < BREAK > key may have
  80          * interrupted the sequence to turn them off.
  81          */
  82
  83         curscr->_attrs = A_ATTRIBUTES;
  84         (void) endwin();
  85 #ifdef  DEBUG
  86         fprintf(stderr, "signal %d caught. quitting.\n", signo);
  87 #endif  /* DEBUG */
  88         if (signo == SIGQUIT)
  89                 (void) abort();
  90         else
  91                 exit(1);
  92 }