mirror of
https://github.com/vivier/EMILE.git
synced 2024-12-21 18:30:20 +00:00
94 lines
2.2 KiB
C
94 lines
2.2 KiB
C
static __attribute__((used)) char* rcsid = "$CVSHeader$";
|
|
/*
|
|
*
|
|
* (c) 2004 Laurent Vivier <Laurent@Vivier.EU>
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <sys/types.h>
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
|
|
#include "libemile.h"
|
|
|
|
#define BLOCK_SIZE 512 /* FIXME: should ask the disk driver */
|
|
|
|
int emile_first_set_param_scsi(int fd, char *second_name)
|
|
{
|
|
int ret;
|
|
int fd_second;
|
|
char first[1024];
|
|
int i;
|
|
int current;
|
|
struct emile_container *container;
|
|
unsigned short max_blocks;
|
|
unsigned short *first_max_blocks = (unsigned short*)&first[1022];
|
|
unsigned long *second_size = (unsigned long*)&first[1018];
|
|
unsigned short *unit_id = (unsigned short*)&first[1016];
|
|
unsigned short *block_size = (unsigned short*)&first[1014];
|
|
unsigned short *count;
|
|
unsigned long *offset;
|
|
off_t location;
|
|
|
|
location = lseek(fd, 0, SEEK_CUR);
|
|
if (location == -1)
|
|
return EEMILE_CANNOT_READ_FIRST;
|
|
|
|
ret = read(fd, first, 1024);
|
|
if (ret == -1)
|
|
return EEMILE_CANNOT_READ_FIRST;
|
|
|
|
max_blocks = *first_max_blocks / 6;
|
|
|
|
container = (struct emile_container*)
|
|
malloc(sizeof(struct emile_container)
|
|
+ max_blocks * sizeof(struct emile_block));
|
|
if (container == NULL)
|
|
return EEMILE_MALLOC_ERROR;
|
|
|
|
fd_second = open(second_name, O_RDONLY);
|
|
if (fd_second == -1)
|
|
return EEMILE_CANNOT_OPEN_FILE;
|
|
|
|
ret = emile_scsi_create_container(fd_second, unit_id, container, max_blocks);
|
|
if (ret != 0)
|
|
return ret;
|
|
close(fd_second);
|
|
|
|
*block_size = BLOCK_SIZE;
|
|
|
|
*second_size = 0;
|
|
current = 1014;
|
|
for(i = 0; i < max_blocks - 1; i++)
|
|
{
|
|
current -= 2;
|
|
count = (unsigned short*)(&first[current]);
|
|
*count = container->blocks[i].count;
|
|
if (container->blocks[i].count == 0)
|
|
break;
|
|
current -= 4;
|
|
offset = (unsigned long*)(&first[current]);
|
|
*offset = container->blocks[i].offset;
|
|
(*second_size) += container->blocks[i].count;
|
|
}
|
|
/* mark end of blocks list */
|
|
current -= 2;
|
|
count = (unsigned short*)(&first[current]);
|
|
*count = 0;
|
|
/* set second level size */
|
|
(*second_size) *= BLOCK_SIZE;
|
|
|
|
ret = lseek(fd, location, SEEK_SET);
|
|
if (ret != 0)
|
|
return EEMILE_CANNOT_WRITE_FIRST;
|
|
|
|
ret = write(fd, first, 1024);
|
|
if (ret == -1)
|
|
return EEMILE_CANNOT_WRITE_FIRST;
|
|
|
|
return 0;
|
|
}
|