diff options
Diffstat (limited to 'lib/libedit/sig.c')
| -rw-r--r-- | lib/libedit/sig.c | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/lib/libedit/sig.c b/lib/libedit/sig.c new file mode 100644 index 000000000000..55bebb03b59c --- /dev/null +++ b/lib/libedit/sig.c @@ -0,0 +1,196 @@ +/*- + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. 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. + * + * $NetBSD: sig.c,v 1.7 2001/01/04 15:55:03 christos Exp $ + */ + +#if !defined(lint) && !defined(SCCSID) +static char sccsid[] = "@(#)sig.c 8.1 (Berkeley) 6/4/93"; +#endif /* not lint && not SCCSID */ +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +/* + * sig.c: Signal handling stuff. + * our policy is to trap all signals, set a good state + * and pass the ball to our caller. + */ +#include "sys.h" +#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); + + switch (signo) { + case SIGCONT: + tty_rawmode(sel); + if (ed_redisplay(sel, 0) == CC_REFRESH) + re_refresh(sel); + term__flush(); + 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) signal(signo, sel->el_signal[i]); + (void) sigprocmask(SIG_SETMASK, &oset, NULL); + (void) kill(0, signo); +} + + +/* sig_init(): + * Initialize all signal stuff + */ +protected int +sig_init(EditLine *el) +{ + int i; + sigset_t nset, oset; + + (void) sigemptyset(&nset); +#define _DO(a) (void) sigaddset(&nset, a); + ALLSIGS +#undef _DO + (void) sigprocmask(SIG_BLOCK, &nset, &oset); + +#define SIGSIZE (sizeof(sighdl) / sizeof(sighdl[0]) * sizeof(sig_t)) + + el->el_signal = (sig_t *) el_malloc(SIGSIZE); + if (el->el_signal == NULL) + return (-1); + for (i = 0; sighdl[i] != -1; i++) + el->el_signal[i] = SIG_ERR; + + (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) +{ + int i; + sigset_t nset, oset; + + (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++) { + sig_t s; + /* This could happen if we get interrupted */ + if ((s = signal(sighdl[i], sig_handler)) != sig_handler) + el->el_signal[i] = s; + } + sel = el; + (void) sigprocmask(SIG_SETMASK, &oset, NULL); +} + + +/* sig_clr(): + * clear all the signal handlers + */ +protected void +sig_clr(EditLine *el) +{ + int i; + sigset_t nset, oset; + + (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++) + if (el->el_signal[i] != SIG_ERR) + (void) signal(sighdl[i], el->el_signal[i]); + + sel = NULL; /* we are going to die if the handler is + * called */ + (void) sigprocmask(SIG_SETMASK, &oset, NULL); +} |