2 * Copyright (c) 2016 The DragonFly Project
3 * Copyright (c) 2005 Takanori Watanabe
4 * Copyright (c) 2014 The FreeBSD Foundation
7 * This software was developed by Edward Tomasz Napierala under sponsorship
8 * from the FreeBSD Foundation.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
41 #define NTFS_A_VOLUMENAME 0x60
42 #define NTFS_FILEMAGIC ((uint32_t)(0x454C4946))
43 #define NTFS_VOLUMEINO 3
52 uint8_t a_compression;
71 uint32_t fr_allocated;
76 struct ntfs_bootfile {
86 uint8_t reserver4[12];
89 uint64_t bf_mftmirrcn;
96 convert_label(const void *label /* LE */, size_t labellen, char *label_out,
103 /* dstname="" means convert to the current locale. */
104 cd = iconv_open("", NTFS_ENC);
105 if (cd == (iconv_t)-1) {
106 warn("ntfs: Could not open iconv");
110 label_out_orig = label_out;
112 rc = iconv(cd, __DECONST(char **, &label), &labellen, &label_out,
114 if (rc == (size_t)-1) {
115 warn("ntfs: iconv()");
116 *label_out_orig = '\0';
118 /* NUL-terminate result (iconv advances label_out). */
128 fstyp_ntfs(FILE *fp, char *label, size_t size, const char *devpath)
130 struct ntfs_bootfile *bf;
131 struct ntfs_filerec *fr;
132 struct ntfs_attr *atr;
140 bf = (struct ntfs_bootfile *)read_buf(fp, 0, 512);
141 if (bf == NULL || strncmp(bf->bf_sysid, "NTFS ", 8) != 0)
146 mftrecsz = bf->bf_mftrecsz;
147 recsize = (mftrecsz > 0) ? (mftrecsz * bf->bf_bps * bf->bf_spc) : (1 << -mftrecsz);
149 voloff = bf->bf_mftcn * bf->bf_spc * bf->bf_bps +
150 recsize * NTFS_VOLUMEINO;
152 filerecp = read_buf(fp, voloff, recsize);
153 if (filerecp == NULL)
155 fr = (struct ntfs_filerec *)filerecp;
157 if (fr->fr_hdrmagic != NTFS_FILEMAGIC)
160 for (ap = filerecp + fr->fr_attroff;
161 atr = (struct ntfs_attr *)ap, (int)atr->a_type != -1;
163 if (atr->a_type != NTFS_A_VOLUMENAME)
166 convert_label(ap + atr->a_dataoff,
167 atr->a_datalen, label, size);