1 /* 2 * Copyright (c) 1989, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Michael Fischbein. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)util.c 8.3 (Berkeley) 4/2/94 37 * $FreeBSD: src/bin/ls/util.c,v 1.20.2.5 2002/07/08 06:59:27 tjr Exp $ 38 * $DragonFly: src/bin/ls/util.c,v 1.3 2003/12/27 17:49:38 drhodus Exp $ 39 */ 40 41 #include <sys/types.h> 42 #include <sys/stat.h> 43 44 #include <ctype.h> 45 #include <err.h> 46 #include <fts.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 51 #include "ls.h" 52 #include "extern.h" 53 54 int 55 prn_printable(const char *s) 56 { 57 char c; 58 int n; 59 60 for (n = 0; (c = *s) != '\0'; ++s, ++n) 61 if (isprint((unsigned char)c)) 62 putchar(c); 63 else 64 putchar('?'); 65 return n; 66 } 67 68 /* 69 * The fts system makes it difficult to replace fts_name with a different- 70 * sized string, so we just calculate the real length here and do the 71 * conversion in prn_octal() 72 * 73 * XXX when using f_octal_escape (-b) rather than f_octal (-B), the 74 * length computed by len_octal may be too big. I just can't be buggered 75 * to fix this as an efficient fix would involve a lookup table. Same goes 76 * for the rather inelegant code in prn_octal. 77 * 78 * DES 1998/04/23 79 */ 80 81 size_t 82 len_octal(const char *s, int len) 83 { 84 size_t r = 0; 85 86 while (len--) 87 if (isprint((unsigned const char)*s++)) r++; else r += 4; 88 return r; 89 } 90 91 int 92 prn_octal(const char *s) 93 { 94 unsigned char ch; 95 int len = 0; 96 97 while ((ch = (unsigned char)*s++)) { 98 if (isprint(ch) && (ch != '\"') && (ch != '\\')) 99 putchar(ch), len++; 100 else if (f_octal_escape) { 101 putchar('\\'); 102 switch (ch) { 103 case '\\': 104 putchar('\\'); 105 break; 106 case '\"': 107 putchar('"'); 108 break; 109 case '\a': 110 putchar('a'); 111 break; 112 case '\b': 113 putchar('b'); 114 break; 115 case '\f': 116 putchar('f'); 117 break; 118 case '\n': 119 putchar('n'); 120 break; 121 case '\r': 122 putchar('r'); 123 break; 124 case '\t': 125 putchar('t'); 126 break; 127 case '\v': 128 putchar('v'); 129 break; 130 default: 131 putchar('0' + (ch >> 6)); 132 putchar('0' + ((ch >> 3) & 7)); 133 putchar('0' + (ch & 7)); 134 len += 2; 135 break; 136 } 137 len += 2; 138 } 139 else { 140 putchar('\\'); 141 putchar('0' + (ch >> 6)); 142 putchar('0' + ((ch >> 3) & 7)); 143 putchar('0' + (ch & 7)); 144 len += 4; 145 } 146 } 147 return len; 148 } 149 150 void 151 usage(void) 152 { 153 (void)fprintf(stderr, 154 #ifdef COLORLS 155 "usage: ls [-ABCFGHLPRTWabcdfghiklmnoqrstuwx1]" 156 #else 157 "usage: ls [-ABCFHLPRTWabcdfghiklmnoqrstuwx1]" 158 #endif 159 " [file ...]\n"); 160 exit(1); 161 } 162