sbin/newfs_msdos/newfs_msdos.c

   1 /*      $NetBSD: newfs_msdos.c,v 1.43 2015/04/23 13:27:14 abs Exp $     */
   2
   3 /*
   4  * Copyright (c) 1998 Robert Nordier
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  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
  15  *    distribution.
  16  *
  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.
  28  */
  29
  30 #include <sys/cdefs.h>
  31 #ifndef lint
  32 #if 0
  33 static const char rcsid[] =
  34   "$FreeBSD: src/sbin/newfs_msdos/newfs_msdos.c,v 1.15 2000/10/10 01:49:37 wollman Exp $";
  35 #else
  36 __RCSID("$NetBSD: newfs_msdos.c,v 1.43 2015/04/23 13:27:14 abs Exp $");
  37 #endif
  38 #endif /* not lint */
  39
  40 #include <sys/param.h>
  41 #include <stdio.h>
  42 #include <string.h>
  43 #include <err.h>
  44 #include <stdlib.h>
  45 #include <unistd.h>
  46 #include <paths.h>
  47 #include <errno.h>
  48
  49 #include "mkfs_msdos.h"
  50
  51 #define argto1(arg, lo, msg)  argtou(arg, lo, 0xff, msg)
  52 #define argto2(arg, lo, msg)  argtou(arg, lo, 0xffff, msg)
  53 #define argto4(arg, lo, msg)  argtou(arg, lo, 0xffffffff, msg)
  54 #define argtox(arg, lo, msg)  argtou(arg, lo, UINT_MAX, msg)
  55
  56 __dead static void usage(void);
  57 static u_int argtou(const char *, u_int, u_int, const char *);
  58 static off_t argtooff(const char *, const char *);
  59
  60 /*
  61  * Construct a FAT12, FAT16, or FAT32 file system.
  62  */
  63 int
  64 main(int argc, char *argv[])
  65 {
  66     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:";
  67     struct msdos_options o;
  68     char *fname, *dtype;
  69     char buf[MAXPATHLEN];
  70     int ch;
  71
  72     memset(&o, 0, sizeof(o));
  73
  74     while ((ch = getopt(argc, argv, opts)) != -1)
  75         switch (ch) {
  76         case '@':
  77             o.offset = argtooff(optarg, "offset");
  78             break;
  79         case 'N':
  80             o.no_create = 1;
  81             break;
  82         case 'B':
  83             o.bootstrap = optarg;
  84             break;
  85         case 'C':
  86             o.create_size = argtooff(optarg, "create size");
  87             break;
  88         case 'F':
  89             o.fat_type = atoi(optarg);
  90             break;
  91         case 'I':
  92             o.volume_id = argto4(optarg, 0, "volume ID");
  93             o.volume_id_set = 1;
  94             break;
  95         case 'L':
  96             o.volume_label = optarg;
  97             break;
  98         case 'O':
  99             o.OEM_string = optarg;
 100             break;
 101         case 'S':
 102             o.bytes_per_sector = argto2(optarg, 1, "bytes/sector");
 103             break;
 104         case 'a':
 105             o.sectors_per_fat = argto4(optarg, 1, "sectors/FAT");
 106             break;
 107         case 'b':
 108             o.block_size = argtox(optarg, 1, "block size");
 109             break;
 110         case 'c':
 111             o.sectors_per_cluster = argto1(optarg, 1, "sectors/cluster");
 112             break;
 113         case 'e':
 114             o.directory_entries = argto2(optarg, 1, "directory entries");
 115             break;
 116         case 'f':
 117             o.floppy = optarg;
 118             break;
 119         case 'h':
 120             o.drive_heads = argto2(optarg, 1, "drive heads");
 121             break;
 122         case 'i':
 123             o.info_sector = argto2(optarg, 1, "info sector");
 124             break;
 125         case 'k':
 126             o.backup_sector = argto2(optarg, 1, "backup sector");
 127             break;
 128         case 'm':
 129             o.media_descriptor = argto1(optarg, 0, "media descriptor");
 130             o.media_descriptor_set = 1;
 131             break;
 132         case 'n':
 133             o.num_FAT = argto1(optarg, 1, "number of FATs");
 134             break;
 135         case 'o':
 136             o.hidden_sectors = argto4(optarg, 0, "hidden sectors");
 137             o.hidden_sectors_set = 1;
 138             break;
 139         case 'r':
 140             o.reserved_sectors = argto2(optarg, 1, "reserved sectors");
 141             break;
 142         case 's':
 143             o.size = argto4(optarg, 1, "file system size");
 144             break;
 145         case 'u':
 146             o.sectors_per_track = argto2(optarg, 1, "sectors/track");
 147             break;
 148         default:
 149             usage();
 150         }
 151     argc -= optind;
 152     argv += optind;
 153     if (argc < 1 || argc > 2)
 154         usage();
 155     fname = *argv++;
 156     if (!strchr(fname, '/') && !o.create_size) {
 157         snprintf(buf, sizeof(buf), "%sr%s", _PATH_DEV, fname);
 158         if (!(fname = strdup(buf)))
 159             err(1, NULL);
 160     }
 161     dtype = *argv;
 162     return mkfs_msdos(fname, dtype, &o);
 163 }
 164
 165 /*
 166  * Convert and check a numeric option argument.
 167  */
 168 static u_int
 169 argtou(const char *arg, u_int lo, u_int hi, const char *msg)
 170 {
 171     off_t x;
 172
 173     errno = 0;
 174     x = argtooff(arg, msg);
 175     if (x < lo || x > hi)
 176         errx(1, "%s: bad %s", arg, msg);
 177     return (u_int)x;
 178 }
 179
 180 /*
 181  * Same for off_t, with optional skmgpP suffix
 182  */
 183 static off_t
 184 argtooff(const char *arg, const char *msg)
 185 {
 186     char *s;
 187     off_t x;
 188
 189     errno = 0;
 190     x = strtoll(arg, &s, 0);
 191     /* allow at most one extra char */
 192     if (errno || x < 0 || (s[0] && s[1]) )
 193         errx(1, "%s: bad %s", arg, msg);
 194     if (*s) {   /* the extra char is the multiplier */
 195         switch (*s) {
 196         default:
 197             errx(1, "%s: bad %s", arg, msg);
 198             /* notreached */
 199
 200         case 's':       /* sector */
 201         case 'S':
 202             x <<= 9;    /* times 512 */
 203             break;
 204
 205         case 'k':       /* kilobyte */
 206         case 'K':
 207             x <<= 10;   /* times 1024 */
 208             break;
 209
 210         case 'm':       /* megabyte */
 211         case 'M':
 212             x <<= 20;   /* times 1024*1024 */
 213             break;
 214
 215         case 'g':       /* gigabyte */
 216         case 'G':
 217             x <<= 30;   /* times 1024*1024*1024 */
 218             break;
 219
 220         case 'p':       /* partition start */
 221         case 'P':       /* partition start */
 222         case 'l':       /* partition length */
 223         case 'L':       /* partition length */
 224             errx(1, "%s: not supported yet %s", arg, msg);
 225             return -1;
 226             /* notreached */
 227         }
 228     }
 229     return x;
 230 }
 231
 232 /*
 233  * Print usage message.
 234  */
 235 static void
 236 usage(void)
 237 {
 238     fprintf(stderr,
 239             "usage: %s [ -options ] special [disktype]\n", getprogname());
 240     fprintf(stderr, "where the options are:\n");
 241 static struct {
 242         char o;
 243         const char *h;
 244 } opts[] = {
 245 #define AOPT(_opt, _type, _name, _min, _desc) { _opt, _desc },
 246 ALLOPTS
 247 #undef AOPT
 248 };
 249     for (size_t i = 0; i < __arraycount(opts); i++)
 250         fprintf(stderr, "\t-%c %s\n", opts[i].o, opts[i].h);
 251     exit(1);
 252 }