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/*
* ----------------------------------------------------------------------------
* "THE BEER-WARE LICENSE" (Revision 42):
* <phk@FreeBSD.org> wrote this file. As long as you retain this notice you
* can do whatever you want with this stuff. If we meet some day, and you think
* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
* ----------------------------------------------------------------------------
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "libdisk.h"
void *
read_block(int fd, daddr_t block, u_long sector_size)
{
void *foo;
int i;
foo = malloc(sector_size);
if (foo == NULL)
return (NULL);
if (-1 == lseek(fd, (off_t)block * sector_size, SEEK_SET)) {
free (foo);
return (NULL);
}
i = read(fd, foo, sector_size);
if ((int)sector_size != i) {
free (foo);
return (NULL);
}
return foo;
}
int
write_block(int fd, daddr_t block, const void *foo, u_long sector_size)
{
int i;
if (-1 == lseek(fd, (off_t)block * sector_size, SEEK_SET))
return (-1);
i = write(fd, foo, sector_size);
if ((int)sector_size != i)
return (-1);
return 0;
}
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