metachar.c revision 1.7
1/* $NetBSD: metachar.c,v 1.7 2020/09/13 15:15:51 rillig Exp $ */ 2 3/*- 4 * Copyright (c) 2015 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Christos Zoulas. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#if HAVE_NBTOOL_CONFIG_H 33#include "nbtool_config.h" 34#endif 35 36#if defined(MAKE_NATIVE) || defined(HAVE_NBTOOL_CONFIG_H) 37#include <sys/cdefs.h> 38#endif 39 40#include "metachar.h" 41 42MAKE_RCSID("$NetBSD: metachar.c,v 1.7 2020/09/13 15:15:51 rillig Exp $"); 43 44/* 45 * The following array is used to make a fast determination of which 46 * characters are interpreted specially by the shell. If a command 47 * contains any of these characters, it is executed by the shell, not 48 * directly by us. 49 * 50 * perhaps move it to ctype? 51 */ 52 53unsigned char _metachar[128] = { 54/* nul soh stx etx eot enq ack bel */ 55 1, 0, 0, 0, 0, 0, 0, 0, 56/* bs ht nl vt np cr so si */ 57 0, 0, 1, 0, 0, 0, 0, 0, 58/* dle dc1 dc2 dc3 dc4 nak syn etb */ 59 0, 0, 0, 0, 0, 0, 0, 0, 60/* can em sub esc fs gs rs us */ 61 0, 0, 0, 0, 0, 0, 0, 0, 62/* sp ! " # $ % & ' */ 63 0, 1, 1, 1, 1, 0, 1, 1, 64/* ( ) * + , - . / */ 65 1, 1, 1, 0, 0, 0, 0, 0, 66/* 0 1 2 3 4 5 6 7 */ 67 0, 0, 0, 0, 0, 0, 0, 0, 68/* 8 9 : ; < = > ? */ 69 0, 0, 0, 1, 1, 0, 1, 1, 70/* @ A B C D E F G */ 71 0, 0, 0, 0, 0, 0, 0, 0, 72/* H I J K L M N O */ 73 0, 0, 0, 0, 0, 0, 0, 0, 74/* P Q R S T U V W */ 75 0, 0, 0, 0, 0, 0, 0, 0, 76/* X Y Z [ \ ] ^ _ */ 77 0, 0, 0, 1, 1, 1, 1, 0, 78/* ` a b c d e f g */ 79 1, 0, 0, 0, 0, 0, 0, 0, 80/* h i j k l m n o */ 81 0, 0, 0, 0, 0, 0, 0, 0, 82/* p q r s t u v w */ 83 0, 0, 0, 0, 0, 0, 0, 0, 84/* x y z { | } ~ del */ 85 0, 0, 0, 1, 1, 1, 1, 0, 86}; 87 88