mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-23 11:18:54 +00:00
51 lines
1.2 KiB
C
51 lines
1.2 KiB
C
/*
|
|
* ----------------------------------------------------------------------------
|
|
* "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;
|
|
}
|