EMILE/libemile/emile_second_set_buffer_size.c

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2004-12-14 23:49:59 +00:00
static __attribute__((used)) char* rcsid = "$CVSHeader$";
/*
*
* (c) 2004 Laurent Vivier <LaurentVivier@wanadoo.fr>
*
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include "libemile.h"
#include "emile.h"
#include "bootblock.h"
int emile_second_set_buffer_size(int fd, u_int32_t buffer_size)
{
emile_l2_header_t header;
int ret;
off_t location;
location = lseek(fd, 0, SEEK_CUR);
if (ret == -1)
return EEMILE_CANNOT_READ_SECOND;
ret = read(fd, &header, sizeof(header));
if (ret != sizeof(header))
return EEMILE_CANNOT_READ_SECOND;
write_long(&header.kernel_size, buffer_size);
ret = lseek(fd, location, SEEK_SET);
if (ret == -1)
return EEMILE_CANNOT_WRITE_SECOND;
ret = write(fd, &header, sizeof(header));
if (ret != sizeof(header))
return EEMILE_CANNOT_WRITE_SECOND;
return 0;
}