112e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala/* $NetBSD: sig.c,v 1.17 2011/07/28 20:50:55 christos Exp $ */ 212e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 312e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala/*- 412e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * Copyright (c) 1992, 1993 512e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * The Regents of the University of California. All rights reserved. 612e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * 712e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * This code is derived from software contributed to Berkeley by 812e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * Christos Zoulas of Cornell University. 912e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * 1012e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * Redistribution and use in source and binary forms, with or without 1112e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * modification, are permitted provided that the following conditions 1212e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * are met: 1312e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * 1. Redistributions of source code must retain the above copyright 1412e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * notice, this list of conditions and the following disclaimer. 1512e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * 2. Redistributions in binary form must reproduce the above copyright 1612e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * notice, this list of conditions and the following disclaimer in the 1712e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * documentation and/or other materials provided with the distribution. 1812e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * 3. Neither the name of the University nor the names of its contributors 1912e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * may be used to endorse or promote products derived from this software 2012e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * without specific prior written permission. 2112e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * 2212e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2312e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2412e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2512e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2612e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2712e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2812e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2912e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3012e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3112e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3212e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * SUCH DAMAGE. 3312e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala */ 3412e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 3512e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala#include "config.h" 3612e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala#if !defined(lint) && !defined(SCCSID) 3712e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala#if 0 3812e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fialastatic char sccsid[] = "@(#)sig.c 8.1 (Berkeley) 6/4/93"; 3912e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala#else 4012e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala__RCSID("$NetBSD: sig.c,v 1.17 2011/07/28 20:50:55 christos Exp $"); 4112e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala#endif 4212e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala#endif /* not lint && not SCCSID */ 4312e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 4412e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala/* 4512e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * sig.c: Signal handling stuff. 4612e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * our policy is to trap all signals, set a good state 4712e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * and pass the ball to our caller. 4812e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala */ 4912e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala#include "el.h" 5012e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala#include <stdlib.h> 5112e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 5212e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fialaprivate EditLine *sel = NULL; 5312e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 5412e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fialaprivate const int sighdl[] = { 5512e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala#define _DO(a) (a), 5612e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala ALLSIGS 5712e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala#undef _DO 5812e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala - 1 5912e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala}; 6012e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 6112e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fialaprivate void sig_handler(int); 6212e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 6312e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala/* sig_handler(): 6412e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * This is the handler called for all signals 6512e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * XXX: we cannot pass any data so we just store the old editline 6612e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * state in a private variable 6712e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala */ 6812e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fialaprivate void 6912e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fialasig_handler(int signo) 7012e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala{ 7112e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala int i; 7212e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala sigset_t nset, oset; 7312e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 7412e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala (void) sigemptyset(&nset); 7512e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala (void) sigaddset(&nset, signo); 7612e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala (void) sigprocmask(SIG_BLOCK, &nset, &oset); 7712e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 7812e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala sel->el_signal->sig_no = signo; 7912e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 8012e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala switch (signo) { 8112e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala case SIGCONT: 8212e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala tty_rawmode(sel); 8312e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala if (ed_redisplay(sel, 0) == CC_REFRESH) 8412e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala re_refresh(sel); 8512e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala terminal__flush(sel); 8612e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala break; 8712e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 8812e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala case SIGWINCH: 8912e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala el_resize(sel); 9012e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala break; 9112e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 9212e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala default: 9312e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala tty_cookedmode(sel); 9412e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala break; 9512e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala } 9612e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 9712e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala for (i = 0; sighdl[i] != -1; i++) 9812e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala if (signo == sighdl[i]) 9912e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala break; 10012e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 10112e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala (void) sigaction(signo, &sel->el_signal->sig_action[i], NULL); 10212e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala sel->el_signal->sig_action[i].sa_handler = SIG_ERR; 10312e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala sel->el_signal->sig_action[i].sa_flags = 0; 10412e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala sigemptyset(&sel->el_signal->sig_action[i].sa_mask); 10512e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala (void) sigprocmask(SIG_SETMASK, &oset, NULL); 10612e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala (void) kill(0, signo); 10712e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala} 10812e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 10912e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 11012e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala/* sig_init(): 11112e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * Initialize all signal stuff 11212e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala */ 11312e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fialaprotected int 11412e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fialasig_init(EditLine *el) 11512e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala{ 11612e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala size_t i; 11712e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala sigset_t *nset, oset; 11812e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 11912e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala el->el_signal = el_malloc(sizeof(*el->el_signal)); 12012e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala if (el->el_signal == NULL) 12112e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala return -1; 12212e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 12312e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala nset = &el->el_signal->sig_set; 12412e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala (void) sigemptyset(nset); 12512e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala#define _DO(a) (void) sigaddset(nset, a); 12612e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala ALLSIGS 12712e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala#undef _DO 12812e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala (void) sigprocmask(SIG_BLOCK, nset, &oset); 12912e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 13012e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala for (i = 0; sighdl[i] != -1; i++) { 13112e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala el->el_signal->sig_action[i].sa_handler = SIG_ERR; 13212e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala el->el_signal->sig_action[i].sa_flags = 0; 13312e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala sigemptyset(&el->el_signal->sig_action[i].sa_mask); 13412e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala } 13512e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 13612e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala (void) sigprocmask(SIG_SETMASK, &oset, NULL); 13712e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 13812e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala return 0; 13912e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala} 14012e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 14112e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 14212e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala/* sig_end(): 14312e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * Clear all signal stuff 14412e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala */ 14512e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fialaprotected void 14612e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fialasig_end(EditLine *el) 14712e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala{ 14812e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 14912e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala el_free(el->el_signal); 15012e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala el->el_signal = NULL; 15112e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala} 15212e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 15312e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 15412e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala/* sig_set(): 15512e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * set all the signal handlers 15612e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala */ 15712e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fialaprotected void 15812e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fialasig_set(EditLine *el) 15912e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala{ 16012e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala size_t i; 16112e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala sigset_t oset; 16212e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala struct sigaction osa, nsa; 16312e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 16412e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala nsa.sa_handler = sig_handler; 16512e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala nsa.sa_flags = 0; 16612e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala sigemptyset(&nsa.sa_mask); 16712e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 16812e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala (void) sigprocmask(SIG_BLOCK, &el->el_signal->sig_set, &oset); 16912e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 17012e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala for (i = 0; sighdl[i] != -1; i++) { 17112e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala /* This could happen if we get interrupted */ 17212e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala if (sigaction(sighdl[i], &nsa, &osa) != -1 && 17312e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala osa.sa_handler != sig_handler) 17412e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala el->el_signal->sig_action[i] = osa; 17512e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala } 17612e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala sel = el; 17712e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala (void) sigprocmask(SIG_SETMASK, &oset, NULL); 17812e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala} 17912e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 18012e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 18112e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala/* sig_clr(): 18212e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * clear all the signal handlers 18312e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala */ 18412e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fialaprotected void 18512e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fialasig_clr(EditLine *el) 18612e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala{ 18712e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala size_t i; 18812e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala sigset_t oset; 18912e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 19012e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala (void) sigprocmask(SIG_BLOCK, &el->el_signal->sig_set, &oset); 19112e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 19212e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala for (i = 0; sighdl[i] != -1; i++) 19312e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala if (el->el_signal->sig_action[i].sa_handler != SIG_ERR) 19412e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala (void)sigaction(sighdl[i], 19512e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala &el->el_signal->sig_action[i], NULL); 19612e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala 19712e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala sel = NULL; /* we are going to die if the handler is 19812e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala * called */ 19912e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala (void)sigprocmask(SIG_SETMASK, &oset, NULL); 20012e21689bc88a77c7b5b9b220fec31e049e5ec0fTodd Fiala} 201