util.c revision 91498
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 37#include <sys/types.h> 38 39__FBSDID("$FreeBSD: head/bin/ls/util.c 91498 2002-02-28 18:52:47Z ache $"); 40 41#if 0 42#ifndef lint 43static char sccsid[] = "@(#)util.c 8.3 (Berkeley) 4/2/94"; 44#endif /* not lint */ 45#endif 46 47#include <sys/types.h> 48#include <sys/stat.h> 49 50#include <ctype.h> 51#include <err.h> 52#include <fts.h> 53#include <stdio.h> 54#include <stdlib.h> 55#include <string.h> 56 57#include "ls.h" 58#include "extern.h" 59 60int 61prn_printable(const char *s) 62{ 63 char c; 64 int n; 65 66 for (n = 0; (c = *s) != '\0'; ++s, ++n) 67 if (isprint((unsigned char)c)) 68 putchar(c); 69 else 70 putchar('?'); 71 return n; 72} 73 74/* 75 * The fts system makes it difficult to replace fts_name with a different- 76 * sized string, so we just calculate the real length here and do the 77 * conversion in prn_octal() 78 * 79 * XXX when using f_octal_escape (-b) rather than f_octal (-B), the 80 * length computed by len_octal may be too big. I just can't be buggered 81 * to fix this as an efficient fix would involve a lookup table. Same goes 82 * for the rather inelegant code in prn_octal. 83 * 84 * DES 1998/04/23 85 */ 86 87size_t 88len_octal(const char *s, int len) 89{ 90 size_t r = 0; 91 92 while (len--) 93 if (isprint((unsigned const char)*s++)) r++; else r += 4; 94 return r; 95} 96 97int 98prn_octal(const char *s) 99{ 100 unsigned char ch; 101 int len = 0; 102 103 while ((ch = (unsigned char)*s++)) { 104 if (isprint(ch) && (ch != '\"') && (ch != '\\')) 105 putchar(ch), len++; 106 else if (f_octal_escape) { 107 putchar('\\'); 108 switch (ch) { 109 case '\\': 110 putchar('\\'); 111 break; 112 case '\"': 113 putchar('"'); 114 break; 115 case '\a': 116 putchar('a'); 117 break; 118 case '\b': 119 putchar('b'); 120 break; 121 case '\f': 122 putchar('f'); 123 break; 124 case '\n': 125 putchar('n'); 126 break; 127 case '\r': 128 putchar('r'); 129 break; 130 case '\t': 131 putchar('t'); 132 break; 133 case '\v': 134 putchar('v'); 135 break; 136 default: 137 putchar('0' + (ch >> 6)); 138 putchar('0' + ((ch >> 3) & 7)); 139 putchar('0' + (ch & 7)); 140 len += 2; 141 break; 142 } 143 len += 2; 144 } 145 else { 146 putchar('\\'); 147 putchar('0' + (ch >> 6)); 148 putchar('0' + ((ch >> 3) & 7)); 149 putchar('0' + (ch & 7)); 150 len += 4; 151 } 152 } 153 return len; 154} 155 156void 157usage(void) 158{ 159 (void)fprintf(stderr, 160#ifdef COLORLS 161 "usage: ls [-ABCFGHLPRTWZabcdfghiklnoqrstu1]" 162#else 163 "usage: ls [-ABCFHLPRTWZabcdfghiklnoqrstu1]" 164#endif 165 " [file ...]\n"); 166 exit(1); 167} 168