util.c revision 35440 
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#ifndef lint
38#if 0
39static char sccsid[] = "@(#)util.c	8.3 (Berkeley) 4/2/94";
40#else
41static const char rcsid[] =
42	"$Id: util.c,v 1.15 1998/04/24 20:15:43 des Exp $";
43#endif
44#endif /* not lint */
45
46#include <sys/types.h>
47#include <sys/stat.h>
48
49#include <ctype.h>
50#include <err.h>
51#include <fts.h>
52#include <stdio.h>
53#include <stdlib.h>
54#include <string.h>
55
56#include "ls.h"
57#include "extern.h"
58
59void
60prcopy(src, dest, len)
61	char *src, *dest;
62	int len;
63{
64	unsigned char ch;
65
66	while (len--) {
67		ch = *src++;
68		*dest++ = isprint(ch) ? ch : '?';
69	}
70}
71
72/*
73 * The fts system makes it difficult to replace fts_name with a different-
74 * sized string, so we just calculate the real length here and do the
75 * conversion in prn_octal()
76 *
77 * XXX when using f_octal_escape (-b) rather than f_octal (-B), the
78 * length computed by len_octal may be too big. I just can't be buggered
79 * to fix this as an efficient fix would involve a lookup table. Same goes
80 * for the rather inelegant code in prn_octal.
81 *
82 *                                              DES 1998/04/23
83 */
84
85int
86len_octal(s, len)
87        char *s;
88	int len;
89{
90        int r;
91
92	while (len--)
93		if (isprint((unsigned char)*s++)) r++; else r += 4;
94	return r;
95}
96
97int
98prn_octal(s)
99        char *s;
100{
101        unsigned char ch;
102	int len = 0;
103
104        while ((ch = *s++))
105	{
106	        if (isprint(ch) && (ch != '\"') && (ch != '\\'))
107		        putchar(ch), len++;
108	        else if (f_octal_escape) {
109	                putchar('\\');
110		        switch (ch) {
111			case '\\':
112			        putchar('\\');
113				break;
114			case '\"':
115			        putchar('"');
116				break;
117			case '\a':
118			        putchar('a');
119				break;
120			case '\b':
121			        putchar('b');
122				break;
123			case '\f':
124			        putchar('f');
125				break;
126			case '\n':
127			        putchar('n');
128				break;
129			case '\r':
130			        putchar('r');
131				break;
132			case '\t':
133			        putchar('t');
134				break;
135			case '\v':
136			        putchar('v');
137				break;
138 		        default:
139		                putchar('0' + (ch >> 6));
140		                putchar('0' + ((ch >> 3) & 3));
141		                putchar('0' + (ch & 3));
142		                len += 2;
143			        break;
144		        }
145		        len += 2;
146	        }
147		else {
148			putchar('\\');
149	                putchar('0' + (ch >> 6));
150	                putchar('0' + ((ch >> 3) & 3));
151	                putchar('0' + (ch & 3));
152	                len += 4;
153		}
154	}
155	return len;
156}
157
158void
159usage()
160{
161	(void)fprintf(stderr, "usage: ls [-ACFHLPRTWacdfgikloqrstu1]"
162		      " [file ...]\n");
163	exit(1);
164}
165