sbin/newfs_msdos/newfs_msdos.c

   1 /*
   2  * Copyright (c) 1998 Robert Nordier
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in
  12  *    the documentation and/or other materials provided with the
  13  *    distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS
  16  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  17  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY
  19  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  21  * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  22  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  23  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
  25  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  *
  27  * $FreeBSD: head/sbin/newfs_msdos/newfs_msdos.c 291385 2015-11-27 14:40:21Z emaste $
  28  */
  29
  30 #include <sys/param.h>
  31
  32 #include <err.h>
  33 #include <errno.h>
  34 #include <paths.h>
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37 #include <string.h>
  38 #include <unistd.h>
  39
  40 #include "mkfs_msdos.h"
  41
  42 #define argto1(arg, lo, msg)  argtou(arg, lo, 0xff, msg)
  43 #define argto2(arg, lo, msg)  argtou(arg, lo, 0xffff, msg)
  44 #define argto4(arg, lo, msg)  argtou(arg, lo, 0xffffffff, msg)
  45 #define argtox(arg, lo, msg)  argtou(arg, lo, UINT_MAX, msg)
  46
  47 static u_int argtou(const char *, u_int, u_int, const char *);
  48 static off_t argtooff(const char *, const char *);
  49 static void usage(void);
  50
  51 /*
  52  * Construct a FAT12, FAT16, or FAT32 file system.
  53  */
  54 int
  55 main(int argc, char *argv[])
  56 {
  57     static const char opts[] = "@:NB:C:F:I:L:O:S:a:b:c:e:f:h:i:k:m:n:o:r:s:u:";
  58     struct msdos_options o;
  59     const char *fname, *dtype;
  60     char buf[MAXPATHLEN];
  61     int ch;
  62
  63     memset(&o, 0, sizeof(o));
  64
  65     while ((ch = getopt(argc, argv, opts)) != -1)
  66         switch (ch) {
  67         case '@':
  68             o.offset = argtooff(optarg, "offset");
  69             break;
  70         case 'N':
  71             o.no_create = 1;
  72             break;
  73         case 'B':
  74             o.bootstrap = optarg;
  75             break;
  76         case 'C':
  77             o.create_size = argtooff(optarg, "create size");
  78             break;
  79         case 'F':
  80             if (strcmp(optarg, "12") &&
  81                 strcmp(optarg, "16") &&
  82                 strcmp(optarg, "32"))
  83                 errx(1, "%s: bad FAT type", optarg);
  84             o.fat_type = atoi(optarg);
  85             break;
  86         case 'I':
  87             o.volume_id = argto4(optarg, 0, "volume ID");
  88             o.volume_id_set = 1;
  89             break;
  90         case 'L':
  91             o.volume_label = optarg;
  92             break;
  93         case 'O':
  94             o.OEM_string = optarg;
  95             break;
  96         case 'S':
  97             o.bytes_per_sector = argto2(optarg, 1, "bytes/sector");
  98             break;
  99         case 'a':
 100             o.sectors_per_fat = argto4(optarg, 1, "sectors/FAT");
 101             break;
 102         case 'b':
 103             o.block_size = argtox(optarg, 1, "block size");
 104             o.sectors_per_cluster = 0;
 105             break;
 106         case 'c':
 107             o.sectors_per_cluster = argto1(optarg, 1, "sectors/cluster");
 108             o.block_size = 0;
 109             break;
 110         case 'e':
 111             o.directory_entries = argto2(optarg, 1, "directory entries");
 112             break;
 113         case 'f':
 114             o.floppy = optarg;
 115             break;
 116         case 'h':
 117             o.drive_heads = argto2(optarg, 1, "drive heads");
 118             break;
 119         case 'i':
 120             o.info_sector = argto2(optarg, 1, "info sector");
 121             break;
 122         case 'k':
 123             o.backup_sector = argto2(optarg, 1, "backup sector");
 124             break;
 125         case 'm':
 126             o.media_descriptor = argto1(optarg, 0, "media descriptor");
 127             o.media_descriptor_set = 1;
 128             break;
 129         case 'n':
 130             o.num_FAT = argto1(optarg, 1, "number of FATs");
 131             break;
 132         case 'o':
 133             o.hidden_sectors = argto4(optarg, 0, "hidden sectors");
 134             o.hidden_sectors_set = 1;
 135             break;
 136         case 'r':
 137             o.reserved_sectors = argto2(optarg, 1, "reserved sectors");
 138             break;
 139         case 's':
 140             o.size = argto4(optarg, 1, "file system size");
 141             break;
 142         case 'u':
 143             o.sectors_per_track = argto2(optarg, 1, "sectors/track");
 144             break;
 145         default:
 146             usage();
 147         }
 148     argc -= optind;
 149     argv += optind;
 150     if (argc < 1 || argc > 2)
 151         usage();
 152     fname = *argv++;
 153     if (!o.create_size && !strchr(fname, '/')) {
 154         snprintf(buf, sizeof(buf), "%s%s", _PATH_DEV, fname);
 155         if (!(fname = strdup(buf)))
 156             err(1, NULL);
 157     }
 158     dtype = *argv;
 159     return !!mkfs_msdos(fname, dtype, &o);
 160 }
 161
 162 /*
 163  * Convert and check a numeric option argument.
 164  */
 165 static u_int
 166 argtou(const char *arg, u_int lo, u_int hi, const char *msg)
 167 {
 168     char *s;
 169     u_long x;
 170
 171     errno = 0;
 172     x = strtoul(arg, &s, 0);
 173     if (errno || !*arg || *s || x < lo || x > hi)
 174         errx(1, "%s: bad %s", arg, msg);
 175     return x;
 176 }
 177
 178 /*
 179  * Same for off_t, with optional skmgpP suffix
 180  */
 181 static off_t
 182 argtooff(const char *arg, const char *msg)
 183 {
 184     char *s;
 185     off_t x;
 186
 187     errno = 0;
 188     x = strtoll(arg, &s, 0);
 189     /* allow at most one extra char */
 190     if (errno || x < 0 || (s[0] && s[1]) )
 191         errx(1, "%s: bad %s", arg, msg);
 192     if (*s) {   /* the extra char is the multiplier */
 193         switch (*s) {
 194         default:
 195             errx(1, "%s: bad %s", arg, msg);
 196             /* notreached */
 197
 198         case 's':               /* sector */
 199         case 'S':
 200             x <<= 9;            /* times 512 */
 201             break;
 202
 203         case 'k':               /* kilobyte */
 204         case 'K':
 205             x <<= 10;           /* times 1024 */
 206             break;
 207
 208         case 'm':               /* megabyte */
 209         case 'M':
 210             x <<= 20;           /* times 1024*1024 */
 211             break;
 212
 213         case 'g':               /* gigabyte */
 214         case 'G':
 215             x <<= 30;           /* times 1024*1024*1024 */
 216             break;
 217
 218         case 'p':               /* partition start */
 219         case 'P':
 220         case 'l':               /* partition length */
 221         case 'L':
 222             errx(1, "%s: not supported yet %s", arg, msg);
 223             /* notreached */
 224         }
 225     }
 226     return x;
 227 }
 228
 229 /*
 230  * Print usage message.
 231  */
 232 static void
 233 usage(void)
 234 {
 235     fprintf(stderr,
 236             "usage: %s [ -options ] special [disktype]\n", getprogname());
 237     fprintf(stderr, "where the options are:\n");
 238 static struct {
 239     char o;
 240     const char *h;
 241 } opts[] = {
 242 #define AOPT(_opt, _type, _name, _min, _desc) { _opt, _desc },
 243 ALLOPTS
 244 #undef AOPT
 245     };
 246     for (size_t i = 0; i < NELEM(opts); i++)
 247         fprintf(stderr, "\t-%c %s\n", opts[i].o, opts[i].h);
 248     exit(1);
 249 }