sig.c revision 1573
11573Srgrimes/*- 21573Srgrimes * Copyright (c) 1992, 1993 31573Srgrimes * The Regents of the University of California. All rights reserved. 41573Srgrimes * 51573Srgrimes * This code is derived from software contributed to Berkeley by 61573Srgrimes * Christos Zoulas of Cornell University. 71573Srgrimes * 81573Srgrimes * Redistribution and use in source and binary forms, with or without 91573Srgrimes * modification, are permitted provided that the following conditions 101573Srgrimes * are met: 111573Srgrimes * 1. Redistributions of source code must retain the above copyright 121573Srgrimes * notice, this list of conditions and the following disclaimer. 131573Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 141573Srgrimes * notice, this list of conditions and the following disclaimer in the 151573Srgrimes * documentation and/or other materials provided with the distribution. 161573Srgrimes * 3. All advertising materials mentioning features or use of this software 171573Srgrimes * must display the following acknowledgement: 181573Srgrimes * This product includes software developed by the University of 191573Srgrimes * California, Berkeley and its contributors. 201573Srgrimes * 4. Neither the name of the University nor the names of its contributors 211573Srgrimes * may be used to endorse or promote products derived from this software 221573Srgrimes * without specific prior written permission. 231573Srgrimes * 241573Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 251573Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 261573Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 271573Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 281573Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 291573Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 301573Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 311573Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 321573Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 331573Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 341573Srgrimes * SUCH DAMAGE. 351573Srgrimes */ 361573Srgrimes 371573Srgrimes#if !defined(lint) && !defined(SCCSID) 381573Srgrimesstatic char sccsid[] = "@(#)sig.c 8.1 (Berkeley) 6/4/93"; 391573Srgrimes#endif /* not lint && not SCCSID */ 401573Srgrimes 411573Srgrimes/* 421573Srgrimes * sig.c: Signal handling stuff. 431573Srgrimes * our policy is to trap all signals, set a good state 441573Srgrimes * and pass the ball to our caller. 451573Srgrimes */ 461573Srgrimes#include "sys.h" 471573Srgrimes#include "el.h" 481573Srgrimes#include <stdlib.h> 491573Srgrimes 501573Srgrimesprivate EditLine *sel = NULL; 511573Srgrimes 521573Srgrimesprivate int sighdl[] = { 531573Srgrimes#define _DO(a) (a), 541573Srgrimes ALLSIGS 551573Srgrimes#undef _DO 561573Srgrimes -1 571573Srgrimes}; 581573Srgrimes 591573Srgrimesprivate void sig_handler __P((int)); 601573Srgrimes 611573Srgrimes/* sig_handler(): 621573Srgrimes * This is the handler called for all signals 631573Srgrimes * XXX: we cannot pass any data so we just store the old editline 641573Srgrimes * state in a private variable 651573Srgrimes */ 661573Srgrimesprivate void 671573Srgrimessig_handler(signo) 681573Srgrimes int signo; 691573Srgrimes{ 701573Srgrimes int i; 711573Srgrimes sigset_t nset, oset; 721573Srgrimes 731573Srgrimes (void) sigemptyset(&nset); 741573Srgrimes (void) sigaddset(&nset, signo); 751573Srgrimes (void) sigprocmask(SIG_BLOCK, &nset, &oset); 761573Srgrimes 771573Srgrimes switch (signo) { 781573Srgrimes case SIGCONT: 791573Srgrimes tty_rawmode(sel); 801573Srgrimes if (ed_redisplay(sel, 0) == CC_REFRESH) 811573Srgrimes re_refresh(sel); 821573Srgrimes term__flush(); 831573Srgrimes break; 841573Srgrimes 851573Srgrimes case SIGWINCH: 861573Srgrimes el_resize(sel); 871573Srgrimes break; 881573Srgrimes 891573Srgrimes default: 901573Srgrimes tty_cookedmode(sel); 911573Srgrimes break; 921573Srgrimes } 931573Srgrimes 941573Srgrimes for (i = 0; sighdl[i] != -1; i++) 951573Srgrimes if (signo == sighdl[i]) 961573Srgrimes break; 971573Srgrimes 981573Srgrimes (void) signal(signo, sel->el_signal[i]); 991573Srgrimes (void) sigprocmask(SIG_SETMASK, &oset, NULL); 1001573Srgrimes (void) kill(0, signo); 1011573Srgrimes} 1021573Srgrimes 1031573Srgrimes 1041573Srgrimes/* sig_init(): 1051573Srgrimes * Initialize all signal stuff 1061573Srgrimes */ 1071573Srgrimesprotected int 1081573Srgrimessig_init(el) 1091573Srgrimes EditLine *el; 1101573Srgrimes{ 1111573Srgrimes int i; 1121573Srgrimes sigset_t nset, oset; 1131573Srgrimes 1141573Srgrimes (void) sigemptyset(&nset); 1151573Srgrimes#define _DO(a) (void) sigaddset(&nset, SIGWINCH); 1161573Srgrimes ALLSIGS 1171573Srgrimes#undef _DO 1181573Srgrimes (void) sigprocmask(SIG_BLOCK, &nset, &oset); 1191573Srgrimes 1201573Srgrimes#define SIGSIZE (sizeof(sighdl) / sizeof(sighdl[0]) * sizeof(sig_t)) 1211573Srgrimes 1221573Srgrimes el->el_signal = (sig_t *) el_malloc(SIGSIZE); 1231573Srgrimes for (i = 0; sighdl[i] != -1; i++) 1241573Srgrimes el->el_signal[i] = BADSIG; 1251573Srgrimes 1261573Srgrimes (void) sigprocmask(SIG_SETMASK, &oset, NULL); 1271573Srgrimes 1281573Srgrimes return 0; 1291573Srgrimes} 1301573Srgrimes 1311573Srgrimes 1321573Srgrimes/* sig_end(): 1331573Srgrimes * Clear all signal stuff 1341573Srgrimes */ 1351573Srgrimesprotected void 1361573Srgrimessig_end(el) 1371573Srgrimes EditLine *el; 1381573Srgrimes{ 1391573Srgrimes el_free((ptr_t) el->el_signal); 1401573Srgrimes el->el_signal = NULL; 1411573Srgrimes} 1421573Srgrimes 1431573Srgrimes 1441573Srgrimes/* sig_set(): 1451573Srgrimes * set all the signal handlers 1461573Srgrimes */ 1471573Srgrimesprotected void 1481573Srgrimessig_set(el) 1491573Srgrimes EditLine *el; 1501573Srgrimes{ 1511573Srgrimes int i; 1521573Srgrimes sigset_t nset, oset; 1531573Srgrimes 1541573Srgrimes (void) sigemptyset(&nset); 1551573Srgrimes#define _DO(a) (void) sigaddset(&nset, SIGWINCH); 1561573Srgrimes ALLSIGS 1571573Srgrimes#undef _DO 1581573Srgrimes (void) sigprocmask(SIG_BLOCK, &nset, &oset); 1591573Srgrimes 1601573Srgrimes for (i = 0; sighdl[i] != -1; i++) { 1611573Srgrimes sig_t s; 1621573Srgrimes /* This could happen if we get interrupted */ 1631573Srgrimes if ((s = signal(sighdl[i], sig_handler)) != sig_handler) 1641573Srgrimes el->el_signal[i] = s; 1651573Srgrimes } 1661573Srgrimes sel = el; 1671573Srgrimes (void) sigprocmask(SIG_SETMASK, &oset, NULL); 1681573Srgrimes} 1691573Srgrimes 1701573Srgrimes 1711573Srgrimes/* sig_clr(): 1721573Srgrimes * clear all the signal handlers 1731573Srgrimes */ 1741573Srgrimesprotected void 1751573Srgrimessig_clr(el) 1761573Srgrimes EditLine *el; 1771573Srgrimes{ 1781573Srgrimes int i; 1791573Srgrimes sigset_t nset, oset; 1801573Srgrimes 1811573Srgrimes (void) sigemptyset(&nset); 1821573Srgrimes#define _DO(a) (void) sigaddset(&nset, SIGWINCH); 1831573Srgrimes ALLSIGS 1841573Srgrimes#undef _DO 1851573Srgrimes (void) sigprocmask(SIG_BLOCK, &nset, &oset); 1861573Srgrimes 1871573Srgrimes for (i = 0; sighdl[i] != -1; i++) 1881573Srgrimes if (el->el_signal[i] != BADSIG) 1891573Srgrimes (void) signal(sighdl[i], el->el_signal[i]); 1901573Srgrimes 1911573Srgrimes sel = NULL; /* we are going to die if the handler is called */ 1921573Srgrimes (void) sigprocmask(SIG_SETMASK, &oset, NULL); 1931573Srgrimes} 194