dump/main.c

   1 /*
   2         main.c (08.11.10)
   3         Prints detailed information about exFAT volume.
   4
   5         Copyright (C) 2010  Andrew Nayenko
   6
   7         This program is free software: you can redistribute it and/or modify
   8         it under the terms of the GNU General Public License as published by
   9         the Free Software Foundation, either version 3 of the License, or
  10         (at your option) any later version.
  11
  12         This program is distributed in the hope that it will be useful,
  13         but WITHOUT ANY WARRANTY; without even the implied warranty of
  14         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15         GNU General Public License for more details.
  16
  17         You should have received a copy of the GNU General Public License
  18         along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include <fcntl.h>
  22 #include <unistd.h>
  23 #include <inttypes.h>
  24 #include <stdio.h>
  25 #include <string.h>
  26 #include <exfat.h>
  27
  28 static void print_generic_info(const struct exfat_super_block* sb)
  29 {
  30         printf("Volume serial number      0x%08x\n",
  31                         le32_to_cpu(sb->volume_serial));
  32         printf("FS version                       %hhu.%hhu\n",
  33                         sb->version.major, sb->version.minor);
  34         printf("Block size                %10u\n",
  35                         BLOCK_SIZE(*sb));
  36         printf("Cluster size              %10u\n",
  37                         CLUSTER_SIZE(*sb));
  38 }
  39
  40 static void print_block_info(const struct exfat_super_block* sb)
  41 {
  42         printf("Blocks count              %10"PRIu64"\n",
  43                         le64_to_cpu(sb->block_count));
  44 }
  45
  46 static void print_cluster_info(const struct exfat_super_block* sb)
  47 {
  48         printf("Clusters count            %10u\n",
  49                         le32_to_cpu(sb->cluster_count));
  50 }
  51
  52 static void print_other_info(const struct exfat_super_block* sb)
  53 {
  54         printf("First block               %10"PRIu64"\n",
  55                         le64_to_cpu(sb->block_start));
  56         printf("FAT first block           %10u\n",
  57                         le32_to_cpu(sb->fat_block_start));
  58         printf("FAT blocks count          %10u\n",
  59                         le32_to_cpu(sb->fat_block_count));
  60         printf("First cluster block       %10u\n",
  61                         le32_to_cpu(sb->cluster_block_start));
  62         printf("Root directory cluster    %10u\n",
  63                         le32_to_cpu(sb->rootdir_cluster));
  64         printf("Volume state                  0x%04hx\n",
  65                         le16_to_cpu(sb->volume_state));
  66         printf("FATs count                %10hhu\n",
  67                         sb->fat_count);
  68         printf("Drive number                    0x%02hhx\n",
  69                         sb->drive_no);
  70         printf("Allocated space           %9hhu%%\n",
  71                         sb->allocated_percent);
  72 }
  73
  74 static int dump_sb(const char* spec)
  75 {
  76         int fd;
  77         struct exfat_super_block sb;
  78
  79         fd = open(spec, O_RDONLY);
  80         if (fd < 0)
  81         {
  82                 exfat_error("failed to open `%s'", spec);
  83                 return 1;
  84         }
  85         if (read(fd, &sb, sizeof(struct exfat_super_block))
  86                         != sizeof(struct exfat_super_block))
  87         {
  88                 close(fd);
  89                 exfat_error("failed to read from `%s'", spec);
  90                 return 1;
  91         }
  92         if (memcmp(sb.oem_name, "EXFAT   ", sizeof(sb.oem_name)) != 0)
  93         {
  94                 close(fd);
  95                 exfat_error("exFAT file system is not found on `%s'", spec);
  96                 return 1;
  97         }
  98
  99         print_generic_info(&sb);
 100         print_block_info(&sb);
 101         print_cluster_info(&sb);
 102         print_other_info(&sb);
 103
 104         close(fd);
 105         return 0;
 106 }
 107
 108 static int dump_full(const char* spec)
 109 {
 110         struct exfat ef;
 111         uint32_t free_clusters;
 112         uint64_t free_blocks;
 113
 114         if (exfat_mount(&ef, spec, "ro") != 0)
 115                 return 1;
 116
 117         free_clusters = exfat_count_free_clusters(&ef);
 118         free_blocks = (uint64_t) free_clusters << ef.sb->bpc_bits;
 119
 120         printf("Volume label         %15s\n", exfat_get_label(&ef));
 121         print_generic_info(ef.sb);
 122         print_block_info(ef.sb);
 123         printf("Free blocks               %10"PRIu64"\n", free_blocks);
 124         print_cluster_info(ef.sb);
 125         printf("Free clusters             %10u\n", free_clusters);
 126         print_other_info(ef.sb);
 127
 128         exfat_unmount(&ef);
 129         return 0;
 130 }
 131
 132 static void usage(const char* prog)
 133 {
 134         fprintf(stderr, "Usage: %s [-s] <device>\n", prog);
 135         exit(1);
 136 }
 137
 138 int main(int argc, char* argv[])
 139 {
 140         char** pp;
 141         const char* spec = NULL;
 142         int sb_only = 0;
 143
 144         for (pp = argv + 1; *pp; pp++)
 145         {
 146                 if (strcmp(*pp, "-s") == 0)
 147                         sb_only = 1;
 148                 else if (spec == NULL)
 149                         spec = *pp;
 150                 else
 151                         usage(argv[0]);
 152         }
 153         if (spec == NULL)
 154                 usage(argv[0]);
 155
 156         if (sb_only)
 157                 return dump_sb(spec);
 158         else
 159                 return dump_full(spec);
 160 }