2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 1998 Robert Nordier
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS
18 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
23 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
25 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
26 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
27 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 static const char rcsid[] =
35 #include <sys/param.h>
45 #include "mkfs_msdos.h"
47 #define argto1(arg, lo, msg) argtou(arg, lo, 0xff, msg)
48 #define argto2(arg, lo, msg) argtou(arg, lo, 0xffff, msg)
49 #define argto4(arg, lo, msg) argtou(arg, lo, 0xffffffff, msg)
50 #define argtox(arg, lo, msg) argtou(arg, lo, UINT_MAX, msg)
52 static u_int argtou(const char *, u_int, u_int, const char *);
53 static off_t argtooff(const char *, const char *);
54 static void usage(void);
57 get_tstamp(const char *b)
63 if (stat(b, &st) != -1)
64 return (time_t)st.st_mtime;
67 l = strtoll(b, &eb, 0);
68 if (b == eb || *eb || errno)
69 errx(EXIT_FAILURE, "Can't parse timestamp '%s'", b);
74 * Construct a FAT12, FAT16, or FAT32 file system.
77 main(int argc, char *argv[])
79 static const char opts[] = "@:NAB:C:F:I:L:O:S:a:b:c:e:f:h:i:k:m:n:o:r:s:T:u:";
80 struct msdos_options o;
81 const char *fname, *dtype;
85 memset(&o, 0, sizeof(o));
87 while ((ch = getopt(argc, argv, opts)) != -1)
90 o.offset = argtooff(optarg, "offset");
102 o.create_size = argtooff(optarg, "create size");
105 if (strcmp(optarg, "12") &&
106 strcmp(optarg, "16") &&
107 strcmp(optarg, "32"))
108 errx(1, "%s: bad FAT type", optarg);
109 o.fat_type = atoi(optarg);
112 o.volume_id = argto4(optarg, 0, "volume ID");
116 o.volume_label = optarg;
119 o.OEM_string = optarg;
122 o.bytes_per_sector = argto2(optarg, 1, "bytes/sector");
125 o.sectors_per_fat = argto4(optarg, 1, "sectors/FAT");
128 o.block_size = argtox(optarg, 1, "block size");
129 o.sectors_per_cluster = 0;
132 o.sectors_per_cluster = argto1(optarg, 1, "sectors/cluster");
136 o.directory_entries = argto2(optarg, 1, "directory entries");
142 o.drive_heads = argto2(optarg, 1, "drive heads");
145 o.info_sector = argto2(optarg, 1, "info sector");
148 o.backup_sector = argto2(optarg, 1, "backup sector");
151 o.media_descriptor = argto1(optarg, 0, "media descriptor");
152 o.media_descriptor_set = 1;
155 o.num_FAT = argto1(optarg, 1, "number of FATs");
158 o.hidden_sectors = argto4(optarg, 0, "hidden sectors");
159 o.hidden_sectors_set = 1;
162 o.reserved_sectors = argto2(optarg, 1, "reserved sectors");
165 o.size = argto4(optarg, 1, "file system size");
169 o.timestamp = get_tstamp(optarg);
172 o.sectors_per_track = argto2(optarg, 1, "sectors/track");
179 if (argc < 1 || argc > 2)
182 if (o.reserved_sectors)
183 errx(1, "align (-A) is incompatible with -r");
186 if (!o.create_size && !strchr(fname, '/')) {
187 snprintf(buf, sizeof(buf), "%s%s", _PATH_DEV, fname);
191 exit(!!mkfs_msdos(fname, dtype, &o));
195 * Convert and check a numeric option argument.
198 argtou(const char *arg, u_int lo, u_int hi, const char *msg)
204 x = strtoul(arg, &s, 0);
205 if (errno || !*arg || *s || x < lo || x > hi)
206 errx(1, "%s: bad %s", arg, msg);
211 * Same for off_t, with optional skmgpP suffix
214 argtooff(const char *arg, const char *msg)
220 x = strtoll(arg, &s, 0);
221 /* allow at most one extra char */
222 if (errno || x < 0 || (s[0] && s[1]) )
223 errx(1, "%s: bad %s", arg, msg);
224 if (*s) { /* the extra char is the multiplier */
227 errx(1, "%s: bad %s", arg, msg);
230 case 's': /* sector */
232 x <<= 9; /* times 512 */
235 case 'k': /* kilobyte */
237 x <<= 10; /* times 1024 */
240 case 'm': /* megabyte */
242 x <<= 20; /* times 1024*1024 */
245 case 'g': /* gigabyte */
247 x <<= 30; /* times 1024*1024*1024 */
250 case 'p': /* partition start */
252 case 'l': /* partition length */
254 errx(1, "%s: not supported yet %s", arg, msg);
262 * Print usage message.
268 "usage: %s [ -options ] special [disktype]\n", getprogname());
269 fprintf(stderr, "where the options are:\n");
274 #define AOPT(_opt, _type, _name, _min, _desc) { _opt, _desc },
278 for (size_t i = 0; i < nitems(opts); i++)
279 fprintf(stderr, "\t-%c %s\n", opts[i].o, opts[i].h);