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
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33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 #if !defined(lint) && !defined(SCCSID)
38 static char sccsid[] = "@(#)sig.c 8.1 (Berkeley) 6/4/93";
39 #endif /* not lint && not SCCSID */
42 * sig.c: Signal handling stuff.
43 * our policy is to trap all signals, set a good state
44 * and pass the ball to our caller.
50 private EditLine *sel = NULL;
52 private int sighdl[] = {
59 private void sig_handler __P((int));
62 * This is the handler called for all signals
63 * XXX: we cannot pass any data so we just store the old editline
64 * state in a private variable
73 (void) sigemptyset(&nset);
74 (void) sigaddset(&nset, signo);
75 (void) sigprocmask(SIG_BLOCK, &nset, &oset);
80 if (ed_redisplay(sel, 0) == CC_REFRESH)
94 for (i = 0; sighdl[i] != -1; i++)
95 if (signo == sighdl[i])
98 (void) signal(signo, sel->el_signal[i]);
99 (void) sigprocmask(SIG_SETMASK, &oset, NULL);
100 (void) kill(0, signo);
105 * Initialize all signal stuff
114 (void) sigemptyset(&nset);
115 #define _DO(a) (void) sigaddset(&nset, SIGWINCH);
118 (void) sigprocmask(SIG_BLOCK, &nset, &oset);
120 #define SIGSIZE (sizeof(sighdl) / sizeof(sighdl[0]) * sizeof(sig_t))
122 el->el_signal = (sig_t *) el_malloc(SIGSIZE);
123 for (i = 0; sighdl[i] != -1; i++)
124 el->el_signal[i] = SIG_ERR;
126 (void) sigprocmask(SIG_SETMASK, &oset, NULL);
133 * Clear all signal stuff
139 el_free((ptr_t) el->el_signal);
140 el->el_signal = NULL;
145 * set all the signal handlers
154 (void) sigemptyset(&nset);
155 #define _DO(a) (void) sigaddset(&nset, SIGWINCH);
158 (void) sigprocmask(SIG_BLOCK, &nset, &oset);
160 for (i = 0; sighdl[i] != -1; i++) {
162 /* This could happen if we get interrupted */
163 if ((s = signal(sighdl[i], sig_handler)) != sig_handler)
164 el->el_signal[i] = s;
167 (void) sigprocmask(SIG_SETMASK, &oset, NULL);
172 * clear all the signal handlers
181 (void) sigemptyset(&nset);
182 #define _DO(a) (void) sigaddset(&nset, SIGWINCH);
185 (void) sigprocmask(SIG_BLOCK, &nset, &oset);
187 for (i = 0; sighdl[i] != -1; i++)
188 if (el->el_signal[i] != SIG_ERR)
189 (void) signal(sighdl[i], el->el_signal[i]);
191 sel = NULL; /* we are going to die if the handler is called */
192 (void) sigprocmask(SIG_SETMASK, &oset, NULL);