1 /* $NetBSD: metachar.c,v 1.10 2021/06/21 18:54:41 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 42 MAKE_RCSID("$NetBSD: metachar.c,v 1.10 2021/06/21 18:54:41 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 51 const unsigned char _metachar[128] = { 52 /* nul soh stx etx eot enq ack bel */ 53 1, 0, 0, 0, 0, 0, 0, 0, 54 /* bs ht nl vt np cr so si */ 55 0, 0, 1, 0, 0, 0, 0, 0, 56 /* dle dc1 dc2 dc3 dc4 nak syn etb */ 57 0, 0, 0, 0, 0, 0, 0, 0, 58 /* can em sub esc fs gs rs us */ 59 0, 0, 0, 0, 0, 0, 0, 0, 60 /* sp ! " # $ % & ' */ 61 0, 1, 1, 1, 1, 0, 1, 1, 62 /* ( ) * + , - . / */ 63 1, 1, 1, 0, 0, 0, 0, 0, 64 /* 0 1 2 3 4 5 6 7 */ 65 0, 0, 0, 0, 0, 0, 0, 0, 66 /* 8 9 : ; < = > ? */ 67 0, 0, 0, 1, 1, 0, 1, 1, 68 /* @ A B C D E F G */ 69 0, 0, 0, 0, 0, 0, 0, 0, 70 /* H I J K L M N O */ 71 0, 0, 0, 0, 0, 0, 0, 0, 72 /* P Q R S T U V W */ 73 0, 0, 0, 0, 0, 0, 0, 0, 74 /* X Y Z [ \ ] ^ _ */ 75 0, 0, 0, 1, 1, 1, 1, 0, 76 /* ` a b c d e f g */ 77 1, 0, 0, 0, 0, 0, 0, 0, 78 /* h i j k l m n o */ 79 0, 0, 0, 0, 0, 0, 0, 0, 80 /* p q r s t u v w */ 81 0, 0, 0, 0, 0, 0, 0, 0, 82 /* x y z { | } ~ del */ 83 0, 0, 0, 1, 1, 1, 1, 0, 84 }; 85