1 /* $NetBSD: shquote.c,v 1.8 2006/03/19 02:33:02 christos Exp $ */ 2 3 /* 4 * Copyright (c) 2001 Christopher G. Demetriou 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed for the 18 * NetBSD Project. See http://www.NetBSD.org/ for 19 * information about NetBSD. 20 * 4. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 * 34 * <<Id: LICENSE,v 1.2 2000/06/14 15:57:33 cgd Exp>> 35 */ 36 37 #include <sys/cdefs.h> 38 #if defined(LIBC_SCCS) && !defined(lint) 39 __RCSID("$NetBSD: shquote.c,v 1.8 2006/03/19 02:33:02 christos Exp $"); 40 #endif /* LIBC_SCCS and not lint */ 41 42 /* 43 * Define SHQUOTE_USE_MULTIBYTE if you want shquote() to handle multibyte 44 * characters using mbrtowc(). 45 * 46 * Please DO NOT rip this #ifdef out of the code. It's also here to help 47 * portability. 48 */ 49 #undef SHQUOTE_USE_MULTIBYTE 50 51 #include "namespace.h" 52 #include <stdlib.h> 53 #include <string.h> 54 #ifdef SHQUOTE_USE_MULTIBYTE 55 #include <limits.h> 56 #include <stdio.h> 57 #include <wchar.h> 58 #endif 59 60 #ifdef __weak_alias 61 __weak_alias(shquote,_shquote) 62 #endif 63 64 /* 65 * shquote(): 66 * 67 * Requotes arguments so that they'll be interpreted properly by the 68 * shell (/bin/sh). 69 * 70 * Wraps single quotes around the string, and replaces single quotes 71 * in the string with the sequence: 72 * '\'' 73 * 74 * Returns the number of characters required to hold the resulting quoted 75 * argument. 76 * 77 * The buffer supplied is filled in and NUL-terminated. If 'bufsize' 78 * indicates that the buffer is too short to hold the output string, the 79 * first (bufsize - 1) bytes of quoted argument are filled in and the 80 * buffer is NUL-terminated. 81 * 82 * Changes could be made to optimize the length of strings output by this 83 * function: 84 * 85 * * if there are no metacharacters or whitespace in the input, 86 * the output could be the input string. 87 */ 88 89 #ifdef SHQUOTE_USE_MULTIBYTE 90 91 #define XLATE_OUTCH(x) wcrtomb(outch, (x), &mbso) 92 #define XLATE_INCH() \ 93 do { \ 94 n = mbrtowc(&c, arg, MB_CUR_MAX, &mbsi); \ 95 } while (/*LINTED const cond*/0) 96 97 #else 98 99 #define XLATE_OUTCH(x) (outch[0] = (x), 1) 100 #define XLATE_INCH() \ 101 do { \ 102 n = ((c = *arg) != '\0') ? 1 : 0; \ 103 } while (/*LINTED const cond*/0) 104 105 #endif 106 107 #define PUT(x) \ 108 do { \ 109 outchlen = XLATE_OUTCH(x); \ 110 if (outchlen == (size_t)-1) \ 111 goto bad; \ 112 rv += outchlen; \ 113 if (bufsize != 0) { \ 114 if (bufsize < outchlen || \ 115 (bufsize == outchlen && \ 116 outch[outchlen - 1] != '\0')) { \ 117 *buf = '\0'; \ 118 bufsize = 0; \ 119 } else { \ 120 memcpy(buf, outch, outchlen); \ 121 buf += outchlen; \ 122 bufsize -= outchlen; \ 123 } \ 124 } \ 125 } while (/*LINTED const cond*/0) 126 127 size_t 128 shquote(const char *arg, char *buf, size_t bufsize) 129 { 130 #ifdef SHQUOTE_USE_MULTIBYTE 131 char outch[MB_LEN_MAX]; 132 mbstate_t mbsi, mbso; 133 wchar_t c, lastc; 134 size_t outchlen; 135 #else 136 char outch[1]; 137 char c, lastc; 138 size_t outchlen; 139 #endif 140 size_t rv; 141 int n; 142 143 rv = 0; 144 lastc = 0; 145 #ifdef SHQUOTE_USE_MULTIBYTE 146 memset(&mbsi, 0, sizeof mbsi); 147 memset(&mbso, 0, sizeof mbso); 148 #endif 149 150 if (*arg != '\'') 151 PUT('\''); 152 for (;;) { 153 XLATE_INCH(); 154 if (n <= 0) 155 break; 156 arg += n; 157 lastc = c; 158 159 if (c == '\'') { 160 if (rv != 0) 161 PUT('\''); 162 PUT('\\'); 163 PUT('\''); 164 for (;;) { 165 XLATE_INCH(); 166 if (n <= 0 || c != '\'') 167 break; 168 PUT('\\'); 169 PUT('\''); 170 arg += n; 171 } 172 if (n > 0) 173 PUT('\''); 174 } else 175 PUT(c); 176 } 177 if (lastc != '\'') 178 PUT('\''); 179 180 /* Put multibyte or NUL terminator, but don't count the NUL. */ 181 PUT('\0'); 182 rv--; 183 184 return rv; 185 186 bad: 187 /* A multibyte character encoding or decoding error occurred. */ 188 return (size_t)-1; 189 } 190
Indexes created Mon Sep 22 05:09:51 GMT 2025