1 /* $NetBSD: metachar.c,v 1.8 2020/10/30 19:14:20 rillig Exp $ */
4 * Copyright (c) 2015 The NetBSD Foundation, Inc.
7 * This code is derived from software contributed to The NetBSD Foundation
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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.
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.
32 #if HAVE_NBTOOL_CONFIG_H
33 #include "nbtool_config.h"
36 #if defined(MAKE_NATIVE) || defined(HAVE_NBTOOL_CONFIG_H)
37 #include <sys/cdefs.h>
42 MAKE_RCSID("$NetBSD: metachar.c,v 1.8 2020/10/30 19:14:20 rillig Exp $");
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
51 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,
63 1, 1, 1, 0, 0, 0, 0, 0,
65 0, 0, 0, 0, 0, 0, 0, 0,
67 0, 0, 0, 1, 1, 0, 1, 1,
69 0, 0, 0, 0, 0, 0, 0, 0,
71 0, 0, 0, 0, 0, 0, 0, 0,
73 0, 0, 0, 0, 0, 0, 0, 0,
75 0, 0, 0, 1, 1, 1, 1, 0,
77 1, 0, 0, 0, 0, 0, 0, 0,
79 0, 0, 0, 0, 0, 0, 0, 0,
81 0, 0, 0, 0, 0, 0, 0, 0,
82 /* x y z { | } ~ del */
83 0, 0, 0, 1, 1, 1, 1, 0,