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#include "project.h"
#include <sys/ioctl.h>
#include <linux/fs.h>
DISK *
disk_open (char *fn)
{
DISK *ret = calloc (1, sizeof (DISK));
off_t o;
ret->fd = open (fn, O_RDWR);
if (ret->fd < 0)
{
free (ret);
return NULL;
}
ret->name = strdup (fn);
ret->lbas = lseek (ret->fd, (off_t) 0, SEEK_END);
ret->lbas = ret->lbas / (uint64_t) SECTOR_SIZE;
fprintf (stderr, "Opened %s with size of %lld lbas\n", ret->name,
(long long) ret->lbas);
return ret;
}
void
disk_read (DISK * d, void *buf, uint64_t lba, int lbas)
{
lba *= SECTOR_SIZE;
if (lseek (d->fd, lba, SEEK_SET) != lba)
{
perror ("lseek");
abort ();
}
lbas *= SECTOR_SIZE;
if (read (d->fd, buf, lbas) != lbas)
{
perror ("read");
// abort ();
}
}
void
disk_write (DISK * d, void *buf, uint64_t lba, int lbas)
{
lba *= SECTOR_SIZE;
if (lseek (d->fd, lba, SEEK_SET) != lba)
{
perror ("lseek");
abort ();
}
lbas *= SECTOR_SIZE;
if (write (d->fd, buf, lbas) != lbas)
{
perror ("write");
abort ();
}
}
uint64_t
disk_lbas (DISK * d)
{
return d->lbas;
}
disk_reread_kernel_table (DISK * d)
{
if (ioctl (d->fd, BLKRRPART, NULL))
{
perror ("Telling kernel to re-read partition table failed:");
}
else
{
fprintf (stderr, "Kernel has re-read partition table\n");
}
}
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