EMILE/libemile/emile_second_set_configuration.c
2007-08-24 09:27:29 +00:00

54 lines
1.1 KiB
C

/*
*
* (c) 2005-2007 Laurent Vivier <Laurent@lvivier.info>
*
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include "libemile.h"
#include "emile.h"
#include "bootblock.h"
int emile_second_set_configuration(int fd, char *configuration)
{
emile_l2_header_t header;
int ret;
int size;
int len;
off_t offset;
if (configuration == NULL)
return EEMILE_CANNOT_READ_SECOND;
len = strlen (configuration) + 1; /* + 1 for ending 0 */
memset(&header, 0, sizeof(header));
ret = read(fd, &header, sizeof(header));
if (!EMILE_COMPAT(EMILE_06_SIGNATURE, read_long(&header.signature)))
{
offset = lseek(fd, FIRST_LEVEL_SIZE, SEEK_SET);
ret = read(fd, &header, sizeof(header));
if (!EMILE_COMPAT(EMILE_06_SIGNATURE, read_long(&header.signature)))
return EEMILE_INVALID_SECOND;
}
if (ret != sizeof(header))
return EEMILE_CANNOT_READ_SECOND;
size = read_short(&header.conf_size);
if (len > size)
return EEMILE_INVALID_SECOND;
ret = write(fd, configuration, len);
if (ret != len)
return EEMILE_CANNOT_WRITE_SECOND;
return 0;
}