--- /dev/null
+/* $NetBSD: sig.c,v 1.15 2009/02/19 15:20:22 christos Exp $ */
+
+/*-
+ * Copyright (c) 1992, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Christos Zoulas of Cornell University.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include "config.h"
+#if !defined(lint) && !defined(SCCSID)
+#if 0
+static char sccsid[] = "@(#)sig.c 8.1 (Berkeley) 6/4/93";
+#else
+__RCSID("$NetBSD: sig.c,v 1.15 2009/02/19 15:20:22 christos Exp $");
+#endif
+#endif /* not lint && not SCCSID */
+
+/*
+ * sig.c: Signal handling stuff.
+ * our policy is to trap all signals, set a good state
+ * and pass the ball to our caller.
+ */
+#include "el.h"
+#include <stdlib.h>
+
+private EditLine *sel = NULL;
+
+private const int sighdl[] = {
+#define _DO(a) (a),
+ ALLSIGS
+#undef _DO
+ - 1
+};
+
+private void sig_handler(int);
+
+/* sig_handler():
+ * This is the handler called for all signals
+ * XXX: we cannot pass any data so we just store the old editline
+ * state in a private variable
+ */
+private void
+sig_handler(int signo)
+{
+ int i;
+ sigset_t nset, oset;
+
+ (void) sigemptyset(&nset);
+ (void) sigaddset(&nset, signo);
+ (void) sigprocmask(SIG_BLOCK, &nset, &oset);
+
+ sel->el_signal->sig_no = signo;
+
+ switch (signo) {
+ case SIGCONT:
+ tty_rawmode(sel);
+ if (ed_redisplay(sel, 0) == CC_REFRESH)
+ re_refresh(sel);
+ term__flush(sel);
+ break;
+
+ case SIGWINCH:
+ el_resize(sel);
+ break;
+
+ default:
+ tty_cookedmode(sel);
+ break;
+ }
+
+ for (i = 0; sighdl[i] != -1; i++)
+ if (signo == sighdl[i])
+ break;
+
+ (void) sigaction(signo, &sel->el_signal->sig_action[i], NULL);
+ sel->el_signal->sig_action[i].sa_handler = SIG_ERR;
+ sel->el_signal->sig_action[i].sa_flags = 0;
+ sigemptyset(&sel->el_signal->sig_action[i].sa_mask);
+ (void) sigprocmask(SIG_SETMASK, &oset, NULL);
+ (void) kill(0, signo);
+}
+
+
+/* sig_init():
+ * Initialize all signal stuff
+ */
+protected int
+sig_init(EditLine *el)
+{
+ size_t i;
+ sigset_t *nset, oset;
+
+ el->el_signal = el_malloc(sizeof(*el->el_signal));
+ if (el->el_signal == NULL)
+ return -1;
+
+ nset = &el->el_signal->sig_set;
+ (void) sigemptyset(nset);
+#define _DO(a) (void) sigaddset(nset, a);
+ ALLSIGS
+#undef _DO
+ (void) sigprocmask(SIG_BLOCK, nset, &oset);
+
+ for (i = 0; sighdl[i] != -1; i++) {
+ el->el_signal->sig_action[i].sa_handler = SIG_ERR;
+ el->el_signal->sig_action[i].sa_flags = 0;
+ sigemptyset(&el->el_signal->sig_action[i].sa_mask);
+ }
+
+ (void) sigprocmask(SIG_SETMASK, &oset, NULL);
+
+ return 0;
+}
+
+
+/* sig_end():
+ * Clear all signal stuff
+ */
+protected void
+sig_end(EditLine *el)
+{
+
+ el_free((ptr_t) el->el_signal);
+ el->el_signal = NULL;
+}
+
+
+/* sig_set():
+ * set all the signal handlers
+ */
+protected void
+sig_set(EditLine *el)
+{
+ size_t i;
+ sigset_t oset;
+ struct sigaction osa, nsa;
+
+ nsa.sa_handler = sig_handler;
+ nsa.sa_flags = 0;
+ sigemptyset(&nsa.sa_mask);
+
+ (void) sigprocmask(SIG_BLOCK, &el->el_signal->sig_set, &oset);
+
+ for (i = 0; sighdl[i] != -1; i++) {
+ /* This could happen if we get interrupted */
+ if (sigaction(sighdl[i], &nsa, &osa) != -1 &&
+ osa.sa_handler != sig_handler)
+ el->el_signal->sig_action[i] = osa;
+ }
+ sel = el;
+ (void) sigprocmask(SIG_SETMASK, &oset, NULL);
+}
+
+
+/* sig_clr():
+ * clear all the signal handlers
+ */
+protected void
+sig_clr(EditLine *el)
+{
+ size_t i;
+ sigset_t oset;
+
+ (void) sigprocmask(SIG_BLOCK, &el->el_signal->sig_set, &oset);
+
+ for (i = 0; sighdl[i] != -1; i++)
+ if (el->el_signal->sig_action[i].sa_handler != SIG_ERR)
+ (void)sigaction(sighdl[i],
+ &el->el_signal->sig_action[i], NULL);
+
+ sel = NULL; /* we are going to die if the handler is
+ * called */
+ (void)sigprocmask(SIG_SETMASK, &oset, NULL);
+}
projects / deliverable / titan.core.git / blobdiff