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/* $NetBSD: sig.c,v 1.8 2001/01/09 17:31:04 jdolecek Exp $ */ |
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/*- |
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* Copyright (c) 1992, 1993 |
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* The Regents of the University of California. All rights reserved. |
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* |
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* This code is derived from software contributed to Berkeley by |
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* Christos Zoulas of Cornell University. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. All advertising materials mentioning features or use of this software |
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* must display the following acknowledgement: |
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* This product includes software developed by the University of |
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* California, Berkeley and its contributors. |
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* 4. Neither the name of the University nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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#include "noitedit/compat.h" |
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#if !defined(lint) && !defined(SCCSID) |
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#if 0 |
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static char sccsid[] = "@(#)sig.c 8.1 (Berkeley) 6/4/93"; |
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#else |
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__RCSID("$NetBSD: sig.c,v 1.8 2001/01/09 17:31:04 jdolecek Exp $"); |
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#endif |
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#endif /* not lint && not SCCSID */ |
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/* |
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* sig.c: Signal handling stuff. |
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* our policy is to trap all signals, set a good state |
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* and pass the ball to our caller. |
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*/ |
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#include "noitedit/sys.h" |
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#include "noitedit/el.h" |
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#include <stdlib.h> |
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private EditLine *sel = NULL; |
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private const int sighdl[] = { |
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#define _DO(a) (a), |
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ALLSIGS |
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#undef _DO |
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- 1 |
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}; |
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private void sig_handler(int); |
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/* sig_handler(): |
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* This is the handler called for all signals |
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* XXX: we cannot pass any data so we just store the old editline |
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* state in a private variable |
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*/ |
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private void |
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sig_handler(int signo) |
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{ |
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int i; |
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sigset_t nset, oset; |
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(void) sigemptyset(&nset); |
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(void) sigaddset(&nset, signo); |
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(void) sigprocmask(SIG_BLOCK, &nset, &oset); |
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switch (signo) { |
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case SIGCONT: |
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tty_rawmode(sel); |
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if (ed_redisplay(sel, 0) == CC_REFRESH) |
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re_refresh(sel); |
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term__flush(); |
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break; |
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case SIGWINCH: |
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el_resize(sel); |
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break; |
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default: |
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tty_cookedmode(sel); |
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break; |
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} |
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for (i = 0; sighdl[i] != -1; i++) |
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if (signo == sighdl[i]) |
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break; |
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(void) signal(signo, sel->el_signal[i]); |
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(void) sigprocmask(SIG_SETMASK, &oset, NULL); |
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(void) kill(0, signo); |
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} |
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/* sig_init(): |
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* Initialize all signal stuff |
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*/ |
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protected int |
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sig_init(EditLine *el) |
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{ |
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int i; |
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sigset_t nset, oset; |
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(void) sigemptyset(&nset); |
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#define _DO(a) (void) sigaddset(&nset, a); |
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ALLSIGS |
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#undef _DO |
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(void) sigprocmask(SIG_BLOCK, &nset, &oset); |
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#define SIGSIZE (sizeof(sighdl) / sizeof(sighdl[0]) * sizeof(sig_t)) |
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el->el_signal = (sig_t *) el_malloc(SIGSIZE); |
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if (el->el_signal == NULL) |
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return (-1); |
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for (i = 0; sighdl[i] != -1; i++) |
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el->el_signal[i] = SIG_ERR; |
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(void) sigprocmask(SIG_SETMASK, &oset, NULL); |
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return (0); |
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} |
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/* sig_end(): |
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* Clear all signal stuff |
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*/ |
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protected void |
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sig_end(EditLine *el) |
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{ |
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el_free((ptr_t) el->el_signal); |
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el->el_signal = NULL; |
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} |
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/* sig_set(): |
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* set all the signal handlers |
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*/ |
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protected void |
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sig_set(EditLine *el) |
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{ |
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int i; |
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sigset_t nset, oset; |
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(void) sigemptyset(&nset); |
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#define _DO(a) (void) sigaddset(&nset, a); |
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ALLSIGS |
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#undef _DO |
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(void) sigprocmask(SIG_BLOCK, &nset, &oset); |
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for (i = 0; sighdl[i] != -1; i++) { |
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sig_t s; |
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/* This could happen if we get interrupted */ |
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if ((s = signal(sighdl[i], sig_handler)) != sig_handler) |
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el->el_signal[i] = s; |
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} |
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sel = el; |
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(void) sigprocmask(SIG_SETMASK, &oset, NULL); |
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} |
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/* sig_clr(): |
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* clear all the signal handlers |
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*/ |
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protected void |
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sig_clr(EditLine *el) |
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{ |
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int i; |
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sigset_t nset, oset; |
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(void) sigemptyset(&nset); |
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#define _DO(a) (void) sigaddset(&nset, a); |
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ALLSIGS |
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#undef _DO |
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(void) sigprocmask(SIG_BLOCK, &nset, &oset); |
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for (i = 0; sighdl[i] != -1; i++) |
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if (el->el_signal[i] != SIG_ERR) |
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(void) signal(sighdl[i], el->el_signal[i]); |
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sel = NULL; /* we are going to die if the handler is |
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* called */ |
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(void) sigprocmask(SIG_SETMASK, &oset, NULL); |
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} |
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