Superkkt Blog

int
main(int argc, char **argv)
{
   struct statvfs st;

   if (argc != 2)
   {
       fprintf(stderr, "Usage: %s path\n", argv[0]);
       exit(EXIT_FAILURE);
   }

   if (statvfs(argv[1], &st) < 0)
   {
       fprintf(stderr, "Failed to statvfs: %s\n", strerror(errno));
       exit(EXIT_FAILURE);
   }

   /* Filesystem block size */
   printf("Block size: %lu\n", st.f_bsize);

   /* Total block size */
   printf("Total blocks: %lu (%llu Bytes)\n",
           st.f_blocks, (unsigned long long) st.f_bsize * st.f_blocks);

   /* Used block size */
   printf("Used blocks: %lu (%llu Bytes)\n",
           st.f_blocks - st.f_bfree,
           (unsigned long long) st.f_bsize * (st.f_blocks - st.f_bfree));

   /* Free block size */
   printf("Free blocks: %lu (%llu Bytes)\n",
           st.f_bfree, (unsigned long long) st.f_bsize * st.f_bfree);

   /* Available block size for non-superuser */
   printf("Available blocks (For non-superuser): %lu (%llu Bytes)\n",
           st.f_bavail, (unsigned long long) st.f_bsize * st.f_bavail);

   return 0;
}