xref: /freebsd/sys/fs/msdosfs/msdosfs_conv.c (revision 924226fba12cc9a228c73b956e1b7fa24c60b055)
1 /* $FreeBSD$ */
2 /*	$NetBSD: msdosfs_conv.c,v 1.25 1997/11/17 15:36:40 ws Exp $	*/
3 
4 /*-
5  * SPDX-License-Identifier: BSD-4-Clause
6  *
7  * Copyright (C) 1995, 1997 Wolfgang Solfrank.
8  * Copyright (C) 1995, 1997 TooLs GmbH.
9  * All rights reserved.
10  * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below).
11  *
12  * Redistribution and use in source and binary forms, with or without
13  * modification, are permitted provided that the following conditions
14  * are met:
15  * 1. Redistributions of source code must retain the above copyright
16  *    notice, this list of conditions and the following disclaimer.
17  * 2. Redistributions in binary form must reproduce the above copyright
18  *    notice, this list of conditions and the following disclaimer in the
19  *    documentation and/or other materials provided with the distribution.
20  * 3. All advertising materials mentioning features or use of this software
21  *    must display the following acknowledgement:
22  *	This product includes software developed by TooLs GmbH.
23  * 4. The name of TooLs GmbH may not be used to endorse or promote products
24  *    derived from this software without specific prior written permission.
25  *
26  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
27  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
28  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
29  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
31  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
32  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
33  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
34  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
35  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36  */
37 /*-
38  * Written by Paul Popelka (paulp@uts.amdahl.com)
39  *
40  * You can do anything you want with this software, just don't say you wrote
41  * it, and don't remove this notice.
42  *
43  * This software is provided "as is".
44  *
45  * The author supplies this software to be publicly redistributed on the
46  * understanding that the author is not responsible for the correct
47  * functioning of this software in any circumstances and is not liable for
48  * any damages caused by this software.
49  *
50  * October 1992
51  */
52 
53 #include <sys/param.h>
54 #include <sys/systm.h>
55 #include <sys/dirent.h>
56 #include <sys/iconv.h>
57 #include <sys/mount.h>
58 
59 #include <fs/msdosfs/bpb.h>
60 #include <fs/msdosfs/direntry.h>
61 #include <fs/msdosfs/msdosfsmount.h>
62 
63 extern struct iconv_functions *msdosfs_iconv;
64 
65 static int mbsadjpos(const char **, size_t, size_t, int, int, void *handle);
66 static u_char * dos2unixchr(u_char *, const u_char **, size_t *, int, struct msdosfsmount *);
67 static uint16_t unix2doschr(const u_char **, size_t *, struct msdosfsmount *);
68 static u_char * win2unixchr(u_char *, uint16_t, struct msdosfsmount *);
69 static uint16_t unix2winchr(const u_char **, size_t *, int, struct msdosfsmount *);
70 
71 /*
72  * 0 - character disallowed in long file name.
73  * 1 - character should be replaced by '_' in DOS file name,
74  *     and generation number inserted.
75  * 2 - character ('.' and ' ') should be skipped in DOS file name,
76  *     and generation number inserted.
77  */
78 static const u_char
79 unix2dos[256] = {
80 /* iso8859-1 -> cp850 */
81 	0,    0,    0,    0,    0,    0,    0,    0,	/* 00-07 */
82 	0,    0,    0,    0,    0,    0,    0,    0,	/* 08-0f */
83 	0,    0,    0,    0,    0,    0,    0,    0,	/* 10-17 */
84 	0,    0,    0,    0,    0,    0,    0,    0,	/* 18-1f */
85 	2,    0x21, 0,    0x23, 0x24, 0x25, 0x26, 0x27,	/* 20-27 */
86 	0x28, 0x29, 0,    1,    1,    0x2d, 2,    0,	/* 28-2f */
87 	0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,	/* 30-37 */
88 	0x38, 0x39, 0,    1,    0,    1,    0,    0,	/* 38-3f */
89 	0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,	/* 40-47 */
90 	0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,	/* 48-4f */
91 	0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,	/* 50-57 */
92 	0x58, 0x59, 0x5a, 1,    0,    1,    0x5e, 0x5f,	/* 58-5f */
93 	0x60, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,	/* 60-67 */
94 	0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,	/* 68-6f */
95 	0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,	/* 70-77 */
96 	0x58, 0x59, 0x5a, 0x7b, 0,    0x7d, 0x7e, 0,	/* 78-7f */
97 	0,    0,    0,    0,    0,    0,    0,    0,	/* 80-87 */
98 	0,    0,    0,    0,    0,    0,    0,    0,	/* 88-8f */
99 	0,    0,    0,    0,    0,    0,    0,    0,	/* 90-97 */
100 	0,    0,    0,    0,    0,    0,    0,    0,	/* 98-9f */
101 	0,    0xad, 0xbd, 0x9c, 0xcf, 0xbe, 0xdd, 0xf5,	/* a0-a7 */
102 	0xf9, 0xb8, 0xa6, 0xae, 0xaa, 0xf0, 0xa9, 0xee,	/* a8-af */
103 	0xf8, 0xf1, 0xfd, 0xfc, 0xef, 0xe6, 0xf4, 0xfa,	/* b0-b7 */
104 	0xf7, 0xfb, 0xa7, 0xaf, 0xac, 0xab, 0xf3, 0xa8,	/* b8-bf */
105 	0xb7, 0xb5, 0xb6, 0xc7, 0x8e, 0x8f, 0x92, 0x80,	/* c0-c7 */
106 	0xd4, 0x90, 0xd2, 0xd3, 0xde, 0xd6, 0xd7, 0xd8,	/* c8-cf */
107 	0xd1, 0xa5, 0xe3, 0xe0, 0xe2, 0xe5, 0x99, 0x9e,	/* d0-d7 */
108 	0x9d, 0xeb, 0xe9, 0xea, 0x9a, 0xed, 0xe8, 0xe1,	/* d8-df */
109 	0xb7, 0xb5, 0xb6, 0xc7, 0x8e, 0x8f, 0x92, 0x80,	/* e0-e7 */
110 	0xd4, 0x90, 0xd2, 0xd3, 0xde, 0xd6, 0xd7, 0xd8,	/* e8-ef */
111 	0xd1, 0xa5, 0xe3, 0xe0, 0xe2, 0xe5, 0x99, 0xf6,	/* f0-f7 */
112 	0x9d, 0xeb, 0xe9, 0xea, 0x9a, 0xed, 0xe8, 0x98,	/* f8-ff */
113 };
114 
115 static const u_char
116 dos2unix[256] = {
117 /* cp850 -> iso8859-1 */
118 	0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f,	/* 00-07 */
119 	0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f,	/* 08-0f */
120 	0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f,	/* 10-17 */
121 	0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f,	/* 18-1f */
122 	0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,	/* 20-27 */
123 	0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,	/* 28-2f */
124 	0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,	/* 30-37 */
125 	0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,	/* 38-3f */
126 	0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,	/* 40-47 */
127 	0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,	/* 48-4f */
128 	0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,	/* 50-57 */
129 	0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,	/* 58-5f */
130 	0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,	/* 60-67 */
131 	0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,	/* 68-6f */
132 	0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,	/* 70-77 */
133 	0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,	/* 78-7f */
134 	0xc7, 0xfc, 0xe9, 0xe2, 0xe4, 0xe0, 0xe5, 0xe7,	/* 80-87 */
135 	0xea, 0xeb, 0xe8, 0xef, 0xee, 0xec, 0xc4, 0xc5,	/* 88-8f */
136 	0xc9, 0xe6, 0xc6, 0xf4, 0xf6, 0xf2, 0xfb, 0xf9,	/* 90-97 */
137 	0xff, 0xd6, 0xdc, 0xf8, 0xa3, 0xd8, 0xd7, 0x3f,	/* 98-9f */
138 	0xe1, 0xed, 0xf3, 0xfa, 0xf1, 0xd1, 0xaa, 0xba,	/* a0-a7 */
139 	0xbf, 0xae, 0xac, 0xbd, 0xbc, 0xa1, 0xab, 0xbb,	/* a8-af */
140 	0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xc1, 0xc2, 0xc0,	/* b0-b7 */
141 	0xa9, 0x3f, 0x3f, 0x3f, 0x3f, 0xa2, 0xa5, 0x3f,	/* b8-bf */
142 	0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xe3, 0xc3,	/* c0-c7 */
143 	0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0x3f, 0xa4,	/* c8-cf */
144 	0xf0, 0xd0, 0xca, 0xcb, 0xc8, 0x3f, 0xcd, 0xce,	/* d0-d7 */
145 	0xcf, 0x3f, 0x3f, 0x3f, 0x3f, 0xa6, 0xcc, 0x3f,	/* d8-df */
146 	0xd3, 0xdf, 0xd4, 0xd2, 0xf5, 0xd5, 0xb5, 0xfe,	/* e0-e7 */
147 	0xde, 0xda, 0xdb, 0xd9, 0xfd, 0xdd, 0xaf, 0x3f,	/* e8-ef */
148 	0xad, 0xb1, 0x3f, 0xbe, 0xb6, 0xa7, 0xf7, 0xb8,	/* f0-f7 */
149 	0xb0, 0xa8, 0xb7, 0xb9, 0xb3, 0xb2, 0x3f, 0x3f,	/* f8-ff */
150 };
151 
152 static const u_char
153 u2l[256] = {
154 /* tolower */
155 	0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 00-07 */
156 	0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 08-0f */
157 	0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 10-17 */
158 	0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 18-1f */
159 	0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
160 	0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 28-2f */
161 	0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
162 	0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 38-3f */
163 	0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 40-47 */
164 	0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 48-4f */
165 	0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 50-57 */
166 	0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 58-5f */
167 	0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 60-67 */
168 	0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 68-6f */
169 	0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 70-77 */
170 	0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 78-7f */
171 	0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 80-87 */
172 	0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 88-8f */
173 	0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 90-97 */
174 	0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 98-9f */
175 	0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* a0-a7 */
176 	0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* a8-af */
177 	0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* b0-b7 */
178 	0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* b8-bf */
179 	0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* c0-c7 */
180 	0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* c8-cf */
181 	0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xd7, /* d0-d7 */
182 	0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xdf, /* d8-df */
183 	0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* e0-e7 */
184 	0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* e8-ef */
185 	0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* f0-f7 */
186 	0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* f8-ff */
187 };
188 
189 static const u_char
190 l2u[256] = {
191 /* toupper */
192 	0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 00-07 */
193 	0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 08-0f */
194 	0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 10-17 */
195 	0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 18-1f */
196 	0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 20-27 */
197 	0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 28-2f */
198 	0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 30-37 */
199 	0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 38-3f */
200 	0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 40-47 */
201 	0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 48-4f */
202 	0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 50-57 */
203 	0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 58-5f */
204 	0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 60-67 */
205 	0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 68-6f */
206 	0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 70-77 */
207 	0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 78-7f */
208 	0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 80-87 */
209 	0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 88-8f */
210 	0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 90-97 */
211 	0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 98-9f */
212 	0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* a0-a7 */
213 	0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* a8-af */
214 	0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* b0-b7 */
215 	0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* b8-bf */
216 	0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* c0-c7 */
217 	0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* c8-cf */
218 	0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xd7, /* d0-d7 */
219 	0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xdf, /* d8-df */
220 	0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* e0-e7 */
221 	0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* e8-ef */
222 	0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* f0-f7 */
223 	0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* f8-ff */
224 };
225 
226 /*
227  * DOS filenames are made of 2 parts, the name part and the extension part.
228  * The name part is 8 characters long and the extension part is 3
229  * characters long.  They may contain trailing blanks if the name or
230  * extension are not long enough to fill their respective fields.
231  */
232 
233 /*
234  * Convert a DOS filename to a unix filename. And, return the number of
235  * characters in the resulting unix filename excluding the terminating
236  * null.
237  */
238 int
239 dos2unixfn(u_char dn[11], u_char *un, int lower, struct msdosfsmount *pmp)
240 {
241 	size_t i;
242 	int thislong = 0;
243 	u_char *c, tmpbuf[5];
244 
245 	/*
246 	 * If first char of the filename is SLOT_E5 (0x05), then the real
247 	 * first char of the filename should be 0xe5. But, they couldn't
248 	 * just have a 0xe5 mean 0xe5 because that is used to mean a freed
249 	 * directory slot. Another dos quirk.
250 	 */
251 	if (*dn == SLOT_E5)
252 		*dn = 0xe5;
253 
254 	/*
255 	 * Copy the name portion into the unix filename string.
256 	 */
257 	for (i = 8; i > 0 && *dn != ' ';) {
258 		c = dos2unixchr(tmpbuf, __DECONST(const u_char **, &dn), &i,
259 		    lower & LCASE_BASE, pmp);
260 		while (*c != '\0') {
261 			*un++ = *c++;
262 			thislong++;
263 		}
264 	}
265 	dn += i;
266 
267 	/*
268 	 * Now, if there is an extension then put in a period and copy in
269 	 * the extension.
270 	 */
271 	if (*dn != ' ') {
272 		*un++ = '.';
273 		thislong++;
274 		for (i = 3; i > 0 && *dn != ' ';) {
275 			c = dos2unixchr(tmpbuf, __DECONST(const u_char **, &dn),
276 			    &i, lower & LCASE_EXT, pmp);
277 			while (*c != '\0') {
278 				*un++ = *c++;
279 				thislong++;
280 			}
281 		}
282 	}
283 	*un++ = 0;
284 
285 	return (thislong);
286 }
287 
288 /*
289  * Convert a unix filename to a DOS filename according to Win95 rules.
290  * If applicable and gen is not 0, it is inserted into the converted
291  * filename as a generation number.
292  * Returns
293  *	0 if name couldn't be converted
294  *	1 if the converted name is the same as the original
295  *	  (no long filename entry necessary for Win95)
296  *	2 if conversion was successful
297  *	3 if conversion was successful and generation number was inserted
298  */
299 int
300 unix2dosfn(const u_char *un, u_char dn[12], size_t unlen, u_int gen,
301     struct msdosfsmount *pmp)
302 {
303 	ssize_t i, j;
304 	int l;
305 	int conv = 1;
306 	const u_char *cp, *dp, *dp1;
307 	u_char gentext[6], *wcp;
308 	uint16_t c;
309 
310 	/*
311 	 * Fill the dos filename string with blanks. These are DOS's pad
312 	 * characters.
313 	 */
314 	for (i = 0; i < 11; i++)
315 		dn[i] = ' ';
316 	dn[11] = 0;
317 
318 	/*
319 	 * The filenames "." and ".." are handled specially, since they
320 	 * don't follow dos filename rules.
321 	 */
322 	if (un[0] == '.' && unlen == 1) {
323 		dn[0] = '.';
324 		return gen <= 1;
325 	}
326 	if (un[0] == '.' && un[1] == '.' && unlen == 2) {
327 		dn[0] = '.';
328 		dn[1] = '.';
329 		return gen <= 1;
330 	}
331 
332 	/*
333 	 * Filenames with only blanks and dots are not allowed!
334 	 */
335 	for (cp = un, i = unlen; --i >= 0; cp++)
336 		if (*cp != ' ' && *cp != '.')
337 			break;
338 	if (i < 0)
339 		return 0;
340 
341 	/*
342 	 * Filenames with some characters are not allowed!
343 	 */
344 	for (cp = un, i = unlen; i > 0;)
345 		if (unix2doschr(&cp, (size_t *)&i, pmp) == 0)
346 			return 0;
347 
348 	/*
349 	 * Now find the extension
350 	 * Note: dot as first char doesn't start extension
351 	 *	 and trailing dots and blanks are ignored
352 	 * Note(2003/7): It seems recent Windows has
353 	 *	 defferent rule than this code, that Windows
354 	 *	 ignores all dots before extension, and use all
355 	 *	 chars as filename except for dots.
356 	 */
357 	dp = dp1 = NULL;
358 	for (cp = un + 1, i = unlen - 1; --i >= 0;) {
359 		switch (*cp++) {
360 		case '.':
361 			if (!dp1)
362 				dp1 = cp;
363 			break;
364 		case ' ':
365 			break;
366 		default:
367 			if (dp1)
368 				dp = dp1;
369 			dp1 = NULL;
370 			break;
371 		}
372 	}
373 
374 	/*
375 	 * Now convert it (this part is for extension).
376 	 * As Windows XP do, if it's not ascii char,
377 	 * this function should return 2 or 3, so that checkng out Unicode name.
378 	 */
379 	if (dp) {
380 		if (dp1)
381 			l = dp1 - dp;
382 		else
383 			l = unlen - (dp - un);
384 		for (cp = dp, i = l, j = 8; i > 0 && j < 11; j++) {
385 			c = unix2doschr(&cp, (size_t *)&i, pmp);
386 			if (c & 0xff00) {
387 				dn[j] = c >> 8;
388 				if (++j < 11) {
389 					dn[j] = c;
390 					if (conv != 3)
391 						conv = 2;
392 					continue;
393 				} else {
394 					conv = 3;
395 					dn[j-1] = ' ';
396 					break;
397 				}
398 			} else {
399 				dn[j] = c;
400 			}
401 			if (((dn[j] & 0x80) || *(cp - 1) != dn[j]) && conv != 3)
402 				conv = 2;
403 			if (dn[j] == 1) {
404 				conv = 3;
405 				dn[j] = '_';
406 			}
407 			if (dn[j] == 2) {
408 				conv = 3;
409 				dn[j--] = ' ';
410 			}
411 		}
412 		if (i > 0)
413 			conv = 3;
414 		dp--;
415 	} else {
416 		for (dp = cp; *--dp == ' ' || *dp == '.';);
417 		dp++;
418 	}
419 
420 	/*
421 	 * Now convert the rest of the name
422 	 */
423 	for (i = dp - un, j = 0; un < dp && j < 8; j++) {
424 		c = unix2doschr(&un, &i, pmp);
425 		if (c & 0xff00) {
426 			dn[j] = c >> 8;
427 			if (++j < 8) {
428 				dn[j] = c;
429 				if (conv != 3)
430 					conv = 2;
431 				continue;
432 			} else {
433 				conv = 3;
434 				dn[j-1] = ' ';
435 				break;
436 			}
437 		} else {
438 			dn[j] = c;
439 		}
440 		if (((dn[j] & 0x80) || *(un - 1) != dn[j]) && conv != 3)
441 			conv = 2;
442 		if (dn[j] == 1) {
443 			conv = 3;
444 			dn[j] = '_';
445 		}
446 		if (dn[j] == 2) {
447 			conv = 3;
448 			dn[j--] = ' ';
449 		}
450 	}
451 	if (un < dp)
452 		conv = 3;
453 	/*
454 	 * If we didn't have any chars in filename,
455 	 * generate a default
456 	 */
457 	if (!j)
458 		dn[0] = '_';
459 
460 	/*
461 	 * If there wasn't any char dropped,
462 	 * there is no place for generation numbers
463 	 */
464 	if (conv != 3) {
465 		if (gen > 1)
466 			conv = 0;
467 		goto done;
468 	}
469 
470 	/*
471 	 * Now insert the generation number into the filename part
472 	 */
473 	if (gen == 0)
474 		goto done;
475 	for (wcp = gentext + sizeof(gentext); wcp > gentext && gen; gen /= 10)
476 		*--wcp = gen % 10 + '0';
477 	if (gen) {
478 		conv = 0;
479 		goto done;
480 	}
481 	for (i = 8; dn[--i] == ' ';);
482 	i++;
483 	if (gentext + sizeof(gentext) - wcp + 1 > 8 - i)
484 		i = 8 - (gentext + sizeof(gentext) - wcp + 1);
485 	/*
486 	 * Correct posision to where insert the generation number
487 	 */
488 	cp = dn;
489 	i -= mbsadjpos((const char**)&cp, i, unlen, 1, pmp->pm_flags, pmp->pm_d2u);
490 
491 	dn[i++] = '~';
492 	while (wcp < gentext + sizeof(gentext))
493 		dn[i++] = *wcp++;
494 
495 	/*
496 	 * Tail of the filename should be space
497 	 */
498 	while (i < 8)
499 		dn[i++] = ' ';
500 	conv = 3;
501 
502 done:
503 	/*
504 	 * The first character cannot be E5,
505 	 * because that means a deleted entry
506 	 */
507 	if (dn[0] == 0xe5)
508 		dn[0] = SLOT_E5;
509 
510 	return conv;
511 }
512 
513 /*
514  * Create a Win95 long name directory entry
515  * Note: assumes that the filename is valid,
516  *	 i.e. doesn't consist solely of blanks and dots
517  */
518 int
519 unix2winfn(const u_char *un, size_t unlen, struct winentry *wep, int cnt,
520     int chksum, struct msdosfsmount *pmp)
521 {
522 	uint8_t *wcp;
523 	int i, end;
524 	uint16_t code;
525 
526 	/*
527 	 * Drop trailing blanks and dots
528 	 */
529 	unlen = winLenFixup(un, unlen);
530 
531 	/*
532 	 * Cut *un for this slot
533 	 */
534 	unlen = mbsadjpos((const char **)&un, unlen, (cnt - 1) * WIN_CHARS, 2,
535 			  pmp->pm_flags, pmp->pm_u2w);
536 
537 	/*
538 	 * Initialize winentry to some useful default
539 	 */
540 	memset(wep, 0xff, sizeof(*wep));
541 	wep->weCnt = cnt;
542 	wep->weAttributes = ATTR_WIN95;
543 	wep->weReserved1 = 0;
544 	wep->weChksum = chksum;
545 	wep->weReserved2 = 0;
546 
547 	/*
548 	 * Now convert the filename parts
549 	 */
550 	end = 0;
551 	for (wcp = wep->wePart1, i = sizeof(wep->wePart1)/2; --i >= 0 && !end;) {
552 		code = unix2winchr(&un, &unlen, 0, pmp);
553 		*wcp++ = code;
554 		*wcp++ = code >> 8;
555 		if (!code)
556 			end = WIN_LAST;
557 	}
558 	for (wcp = wep->wePart2, i = sizeof(wep->wePart2)/2; --i >= 0 && !end;) {
559 		code = unix2winchr(&un, &unlen, 0, pmp);
560 		*wcp++ = code;
561 		*wcp++ = code >> 8;
562 		if (!code)
563 			end = WIN_LAST;
564 	}
565 	for (wcp = wep->wePart3, i = sizeof(wep->wePart3)/2; --i >= 0 && !end;) {
566 		code = unix2winchr(&un, &unlen, 0, pmp);
567 		*wcp++ = code;
568 		*wcp++ = code >> 8;
569 		if (!code)
570 			end = WIN_LAST;
571 	}
572 	if (!unlen)
573 		end = WIN_LAST;
574 	wep->weCnt |= end;
575 	return !end;
576 }
577 
578 /*
579  * Compare our filename to the one in the Win95 entry
580  * Returns the checksum or -1 if no match
581  */
582 int
583 winChkName(struct mbnambuf *nbp, const u_char *un, size_t unlen, int chksum,
584     struct msdosfsmount *pmp)
585 {
586 	size_t len;
587 	uint16_t c1, c2;
588 	u_char *np;
589 	struct dirent dirbuf;
590 
591 	/*
592 	 * We already have winentry in *nbp.
593 	 */
594 	if (!mbnambuf_flush(nbp, &dirbuf) || dirbuf.d_namlen == 0)
595 		return -1;
596 
597 #ifdef MSDOSFS_DEBUG
598 	printf("winChkName(): un=%s:%zu,d_name=%s:%d\n", un, unlen,
599 							dirbuf.d_name,
600 							dirbuf.d_namlen);
601 #endif
602 
603 	/*
604 	 * Compare the name parts
605 	 */
606 	len = dirbuf.d_namlen;
607 	if (unlen != len)
608 		return -2;
609 
610 	for (np = dirbuf.d_name; unlen > 0 && len > 0;) {
611 		/*
612 		 * Comparison must be case insensitive, because FAT disallows
613 		 * to look up or create files in case sensitive even when
614 		 * it's a long file name.
615 		 */
616 		c1 = unix2winchr(__DECONST(const u_char **, &np), &len,
617 		    LCASE_BASE, pmp);
618 		c2 = unix2winchr(&un, &unlen, LCASE_BASE, pmp);
619 		if (c1 != c2)
620 			return -2;
621 	}
622 	return chksum;
623 }
624 
625 /*
626  * Convert Win95 filename to dirbuf.
627  * Returns the checksum or -1 if impossible
628  */
629 int
630 win2unixfn(struct mbnambuf *nbp, struct winentry *wep, int chksum,
631     struct msdosfsmount *pmp)
632 {
633 	u_char *c, tmpbuf[5];
634 	uint8_t *cp;
635 	uint8_t *np, name[WIN_CHARS * 3 + 1];
636 	uint16_t code;
637 	int i;
638 
639 	if ((wep->weCnt&WIN_CNT) > howmany(WIN_MAXLEN, WIN_CHARS)
640 	    || !(wep->weCnt&WIN_CNT))
641 		return -1;
642 
643 	/*
644 	 * First compare checksums
645 	 */
646 	if (wep->weCnt&WIN_LAST) {
647 		chksum = wep->weChksum;
648 	} else if (chksum != wep->weChksum)
649 		chksum = -1;
650 	if (chksum == -1)
651 		return -1;
652 
653 	/*
654 	 * Convert the name parts
655 	 */
656 	np = name;
657 	for (cp = wep->wePart1, i = sizeof(wep->wePart1)/2; --i >= 0;) {
658 		code = (cp[1] << 8) | cp[0];
659 		switch (code) {
660 		case 0:
661 			*np = '\0';
662 			if (mbnambuf_write(nbp, name,
663 			    (wep->weCnt & WIN_CNT) - 1) != 0)
664 				return -1;
665 			return chksum;
666 		case '/':
667 			*np = '\0';
668 			return -1;
669 		default:
670 			c = win2unixchr(tmpbuf, code, pmp);
671 			while (*c != '\0')
672 				*np++ = *c++;
673 			break;
674 		}
675 		cp += 2;
676 	}
677 	for (cp = wep->wePart2, i = sizeof(wep->wePart2)/2; --i >= 0;) {
678 		code = (cp[1] << 8) | cp[0];
679 		switch (code) {
680 		case 0:
681 			*np = '\0';
682 			if (mbnambuf_write(nbp, name,
683 			    (wep->weCnt & WIN_CNT) - 1) != 0)
684 				return -1;
685 			return chksum;
686 		case '/':
687 			*np = '\0';
688 			return -1;
689 		default:
690 			c = win2unixchr(tmpbuf, code, pmp);
691 			while (*c != '\0')
692 				*np++ = *c++;
693 			break;
694 		}
695 		cp += 2;
696 	}
697 	for (cp = wep->wePart3, i = sizeof(wep->wePart3)/2; --i >= 0;) {
698 		code = (cp[1] << 8) | cp[0];
699 		switch (code) {
700 		case 0:
701 			*np = '\0';
702 			if (mbnambuf_write(nbp, name,
703 			    (wep->weCnt & WIN_CNT) - 1) != 0)
704 				return -1;
705 			return chksum;
706 		case '/':
707 			*np = '\0';
708 			return -1;
709 		default:
710 			c = win2unixchr(tmpbuf, code, pmp);
711 			while (*c != '\0')
712 				*np++ = *c++;
713 			break;
714 		}
715 		cp += 2;
716 	}
717 	*np = '\0';
718 	if (mbnambuf_write(nbp, name, (wep->weCnt & WIN_CNT) - 1) != 0)
719 		return -1;
720 	return chksum;
721 }
722 
723 /*
724  * Compute the unrolled checksum of a DOS filename for Win95 LFN use.
725  */
726 uint8_t
727 winChksum(uint8_t *name)
728 {
729 	int i;
730 	uint8_t s;
731 
732 	for (s = 0, i = 11; --i >= 0; s += *name++)
733 		s = (s << 7)|(s >> 1);
734 	return (s);
735 }
736 
737 /*
738  * Determine the number of slots necessary for Win95 names
739  */
740 int
741 winSlotCnt(const u_char *un, size_t unlen, struct msdosfsmount *pmp)
742 {
743 	size_t wlen;
744 	char wn[WIN_MAXLEN * 2 + 1], *wnp;
745 
746 	unlen = winLenFixup(un, unlen);
747 
748 	if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) {
749 		wlen = WIN_MAXLEN * 2;
750 		wnp = wn;
751 		msdosfs_iconv->conv(pmp->pm_u2w, (const char **)&un, &unlen, &wnp, &wlen);
752 		if (unlen > 0)
753 			return 0;
754 		return howmany(WIN_MAXLEN - wlen/2, WIN_CHARS);
755 	}
756 
757 	if (unlen > WIN_MAXLEN)
758 		return 0;
759 	return howmany(unlen, WIN_CHARS);
760 }
761 
762 /*
763  * Determine the number of bytes necessary for Win95 names
764  */
765 size_t
766 winLenFixup(const u_char *un, size_t unlen)
767 {
768 	for (un += unlen; unlen > 0; unlen--)
769 		if (*--un != ' ' && *un != '.')
770 			break;
771 	return unlen;
772 }
773 
774 /*
775  * Store an area with multi byte string instr, and returns left
776  * byte of instr and moves pointer forward. The area's size is
777  * inlen or outlen.
778  */
779 static int
780 mbsadjpos(const char **instr, size_t inlen, size_t outlen, int weight, int flag, void *handle)
781 {
782 	char *outp, outstr[outlen * weight + 1];
783 
784 	if (flag & MSDOSFSMNT_KICONV && msdosfs_iconv) {
785 		outp = outstr;
786 		outlen *= weight;
787 		msdosfs_iconv->conv(handle, instr, &inlen, &outp, &outlen);
788 		return (inlen);
789 	}
790 
791 	(*instr) += min(inlen, outlen);
792 	return (inlen - min(inlen, outlen));
793 }
794 
795 /*
796  * Convert DOS char to Local char
797  */
798 static u_char *
799 dos2unixchr(u_char *outbuf, const u_char **instr, size_t *ilen, int lower, struct msdosfsmount *pmp)
800 {
801 	u_char c, *outp;
802 	size_t len, olen;
803 
804 	outp = outbuf;
805 	if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) {
806 		olen = len = 4;
807 
808 		if (lower & (LCASE_BASE | LCASE_EXT))
809 			msdosfs_iconv->convchr_case(pmp->pm_d2u, (const char **)instr,
810 						  ilen, (char **)&outp, &olen, KICONV_LOWER);
811 		else
812 			msdosfs_iconv->convchr(pmp->pm_d2u, (const char **)instr,
813 					     ilen, (char **)&outp, &olen);
814 		len -= olen;
815 
816 		/*
817 		 * return '?' if failed to convert
818 		 */
819 		if (len == 0) {
820 			(*ilen)--;
821 			(*instr)++;
822 			*outp++ = '?';
823 		}
824 	} else {
825 		(*ilen)--;
826 		c = *(*instr)++;
827 		c = dos2unix[c];
828 		if (lower & (LCASE_BASE | LCASE_EXT))
829 			c = u2l[c];
830 		*outp++ = c;
831 		outbuf[1] = '\0';
832 	}
833 
834 	*outp = '\0';
835 	outp = outbuf;
836 	return (outp);
837 }
838 
839 /*
840  * Convert Local char to DOS char
841  */
842 static uint16_t
843 unix2doschr(const u_char **instr, size_t *ilen, struct msdosfsmount *pmp)
844 {
845 	u_char c;
846 	char *up, *outp, unicode[3], outbuf[3];
847 	uint16_t wc;
848 	size_t len, ucslen, unixlen, olen;
849 
850 	if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) {
851 		/*
852 		 * to hide an invisible character, using a unicode filter
853 		 */
854 		ucslen = 2;
855 		len = *ilen;
856 		up = unicode;
857 		msdosfs_iconv->convchr(pmp->pm_u2w, (const char **)instr,
858 				     ilen, &up, &ucslen);
859 		unixlen = len - *ilen;
860 
861 		/*
862 		 * cannot be converted
863 		 */
864 		if (unixlen == 0) {
865 			(*ilen)--;
866 			(*instr)++;
867 			return (0);
868 		}
869 
870 		/*
871 		 * return magic number for ascii char
872 		 */
873 		if (unixlen == 1) {
874 			c = *(*instr -1);
875 			if (! (c & 0x80)) {
876 				c = unix2dos[c];
877 				if (c <= 2)
878 					return (c);
879 			}
880 		}
881 
882 		/*
883 		 * now convert using libiconv
884 		 */
885 		*instr -= unixlen;
886 		*ilen = len;
887 
888 		olen = len = 2;
889 		outp = outbuf;
890 		msdosfs_iconv->convchr_case(pmp->pm_u2d, (const char **)instr,
891 					  ilen, &outp, &olen, KICONV_FROM_UPPER);
892 		len -= olen;
893 
894 		/*
895 		 * cannot be converted, but has unicode char, should return magic number
896 		 */
897 		if (len == 0) {
898 			(*ilen) -= unixlen;
899 			(*instr) += unixlen;
900 			return (1);
901 		}
902 
903 		wc = 0;
904 		while(len--)
905 			wc |= (*(outp - len - 1) & 0xff) << (len << 3);
906 		return (wc);
907 	}
908 
909 	(*ilen)--;
910 	c = *(*instr)++;
911 	c = l2u[c];
912 	c = unix2dos[c];
913 	return ((uint16_t)c);
914 }
915 
916 /*
917  * Convert Windows char to Local char
918  */
919 static u_char *
920 win2unixchr(u_char *outbuf, uint16_t wc, struct msdosfsmount *pmp)
921 {
922 	u_char *inp, *outp, inbuf[3];
923 	size_t ilen, olen, len;
924 
925 	outp = outbuf;
926 	if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) {
927 		inbuf[0] = (u_char)(wc>>8);
928 		inbuf[1] = (u_char)wc;
929 		inbuf[2] = '\0';
930 
931 		ilen = 2;
932 		olen = len = 4;
933 		inp = inbuf;
934 		msdosfs_iconv->convchr(pmp->pm_w2u, __DECONST(const char **,
935 		    &inp), &ilen, (char **)&outp, &olen);
936 		len -= olen;
937 
938 		/*
939 		 * return '?' if failed to convert
940 		 */
941 		if (len == 0)
942 			*outp++ = '?';
943 	} else {
944 		*outp++ = (wc & 0xff00) ? '?' : (u_char)(wc & 0xff);
945 	}
946 
947 	*outp = '\0';
948 	outp = outbuf;
949 	return (outp);
950 }
951 
952 /*
953  * Convert Local char to Windows char
954  */
955 static uint16_t
956 unix2winchr(const u_char **instr, size_t *ilen, int lower, struct msdosfsmount *pmp)
957 {
958 	u_char *outp, outbuf[3];
959 	uint16_t wc;
960 	size_t olen;
961 
962 	if (*ilen == 0)
963 		return (0);
964 
965 	if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) {
966 		outp = outbuf;
967 		olen = 2;
968 		if (lower & (LCASE_BASE | LCASE_EXT))
969 			msdosfs_iconv->convchr_case(pmp->pm_u2w, (const char **)instr,
970 						  ilen, (char **)&outp, &olen,
971 						  KICONV_FROM_LOWER);
972 		else
973 			msdosfs_iconv->convchr(pmp->pm_u2w, (const char **)instr,
974 					     ilen, (char **)&outp, &olen);
975 
976 		/*
977 		 * return '0' if end of filename
978 		 */
979 		if (olen == 2)
980 			return (0);
981 
982 		wc = (outbuf[0]<<8) | outbuf[1];
983 
984 		return (wc);
985 	}
986 
987 	(*ilen)--;
988 	wc = (*instr)[0];
989 	if (lower & (LCASE_BASE | LCASE_EXT))
990 		wc = u2l[wc];
991 	(*instr)++;
992 	return (wc);
993 }
994 
995 /*
996  * Initialize the temporary concatenation buffer.
997  */
998 void
999 mbnambuf_init(struct mbnambuf *nbp)
1000 {
1001 
1002 	nbp->nb_len = 0;
1003 	nbp->nb_last_id = -1;
1004 	nbp->nb_buf[sizeof(nbp->nb_buf) - 1] = '\0';
1005 }
1006 
1007 /*
1008  * Fill out our concatenation buffer with the given substring, at the offset
1009  * specified by its id.  Since this function must be called with ids in
1010  * descending order, we take advantage of the fact that ASCII substrings are
1011  * exactly WIN_CHARS in length.  For non-ASCII substrings, we shift all
1012  * previous (i.e. higher id) substrings upwards to make room for this one.
1013  * This only penalizes portions of substrings that contain more than
1014  * WIN_CHARS bytes when they are first encountered.
1015  */
1016 int
1017 mbnambuf_write(struct mbnambuf *nbp, char *name, int id)
1018 {
1019 	char *slot;
1020 	size_t count, newlen;
1021 
1022 	if (nbp->nb_len != 0 && id != nbp->nb_last_id - 1) {
1023 #ifdef MSDOSFS_DEBUG
1024 		printf("msdosfs: non-decreasing id: id %d, last id %d\n",
1025 		    id, nbp->nb_last_id);
1026 #endif
1027 		return (EINVAL);
1028 	}
1029 
1030 	/* Will store this substring in a WIN_CHARS-aligned slot. */
1031 	slot = &nbp->nb_buf[id * WIN_CHARS];
1032 	count = strlen(name);
1033 	newlen = nbp->nb_len + count;
1034 	if (newlen > WIN_MAXLEN || newlen > MAXNAMLEN) {
1035 #ifdef MSDOSFS_DEBUG
1036 		printf("msdosfs: file name length %zu too large\n", newlen);
1037 #endif
1038 		return (ENAMETOOLONG);
1039 	}
1040 
1041 	/* Shift suffix upwards by the amount length exceeds WIN_CHARS. */
1042 	if (count > WIN_CHARS && nbp->nb_len != 0) {
1043 		if ((id * WIN_CHARS + count + nbp->nb_len) >
1044 		    sizeof(nbp->nb_buf))
1045 			return (ENAMETOOLONG);
1046 
1047 		memmove(slot + count, slot + WIN_CHARS, nbp->nb_len);
1048 	}
1049 
1050 	/* Copy in the substring to its slot and update length so far. */
1051 	memcpy(slot, name, count);
1052 	nbp->nb_len = newlen;
1053 	nbp->nb_last_id = id;
1054 
1055 	return (0);
1056 }
1057 
1058 /*
1059  * Take the completed string and use it to setup the struct dirent.
1060  * Be sure to always nul-terminate the d_name and then copy the string
1061  * from our buffer.  Note that this function assumes the full string has
1062  * been reassembled in the buffer.  If it's called before all substrings
1063  * have been written via mbnambuf_write(), the result will be incorrect.
1064  */
1065 char *
1066 mbnambuf_flush(struct mbnambuf *nbp, struct dirent *dp)
1067 {
1068 
1069 	if (nbp->nb_len > sizeof(dp->d_name) - 1) {
1070 		mbnambuf_init(nbp);
1071 		return (NULL);
1072 	}
1073 	memcpy(dp->d_name, &nbp->nb_buf[0], nbp->nb_len);
1074 	dp->d_name[nbp->nb_len] = '\0';
1075 	dp->d_namlen = nbp->nb_len;
1076 
1077 	mbnambuf_init(nbp);
1078 	return (dp->d_name);
1079 }
1080