2 * Copyright (c) 1992, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * Christos Zoulas of Cornell University.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * $FreeBSD: src/lib/libedit/sig.c,v 1.3.6.1 2000/08/16 14:43:40 ache Exp $
37 * $DragonFly: src/lib/libedit/sig.c,v 1.3 2003/11/12 20:21:29 eirikn Exp $
39 * @(#)sig.c 8.1 (Berkeley) 6/4/93
43 * sig.c: Signal handling stuff.
44 * our policy is to trap all signals, set a good state
45 * and pass the ball to our caller.
51 private EditLine *sel = NULL;
53 private int sighdl[] = {
60 private void sig_handler (int);
63 * This is the handler called for all signals
64 * XXX: we cannot pass any data so we just store the old editline
65 * state in a private variable
74 (void) sigemptyset(&nset);
75 (void) sigaddset(&nset, signo);
76 (void) sigprocmask(SIG_BLOCK, &nset, &oset);
81 if (ed_redisplay(sel, 0) == CC_REFRESH)
95 for (i = 0; sighdl[i] != -1; i++)
96 if (signo == sighdl[i])
99 (void) signal(signo, sel->el_signal[i]);
100 (void) sigprocmask(SIG_SETMASK, &oset, NULL);
101 (void) kill(0, signo);
106 * Initialize all signal stuff
115 (void) sigemptyset(&nset);
116 #define _DO(a) (void) sigaddset(&nset, a);
119 (void) sigprocmask(SIG_BLOCK, &nset, &oset);
121 #define SIGSIZE (sizeof(sighdl) / sizeof(sighdl[0]) * sizeof(sig_t))
123 el->el_signal = (sig_t *) el_malloc(SIGSIZE);
124 for (i = 0; sighdl[i] != -1; i++)
125 el->el_signal[i] = SIG_ERR;
127 (void) sigprocmask(SIG_SETMASK, &oset, NULL);
134 * Clear all signal stuff
140 el_free((ptr_t) el->el_signal);
141 el->el_signal = NULL;
146 * set all the signal handlers
155 (void) sigemptyset(&nset);
156 #define _DO(a) (void) sigaddset(&nset, a);
159 (void) sigprocmask(SIG_BLOCK, &nset, &oset);
161 for (i = 0; sighdl[i] != -1; i++) {
163 /* This could happen if we get interrupted */
164 if ((s = signal(sighdl[i], sig_handler)) != sig_handler)
165 el->el_signal[i] = s;
168 (void) sigprocmask(SIG_SETMASK, &oset, NULL);
173 * clear all the signal handlers
182 (void) sigemptyset(&nset);
183 #define _DO(a) (void) sigaddset(&nset, a);
186 (void) sigprocmask(SIG_BLOCK, &nset, &oset);
188 for (i = 0; sighdl[i] != -1; i++)
189 if (el->el_signal[i] != SIG_ERR)
190 (void) signal(sighdl[i], el->el_signal[i]);
192 sel = NULL; /* we are going to die if the handler is called */
193 (void) sigprocmask(SIG_SETMASK, &oset, NULL);