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#include "disklab.h"

#include <stdio.h>
#include <malloc.h>



extern int fd;
extern int blk_size;

void* getoneblk(__u32 block)
{
        int bytes_read;
        char *buf;

        if ( lseek(fd, block * blk_size, SEEK_SET) <  0) {/* ... */
                printf("seek file ext2.img error....\n");
                return NULL;
        }
        
        buf = malloc(blk_size);
        
        if ( (bytes_read = read(fd, buf, blk_size)) < blk_size )
                printf("%s:%s: read %d bytes less than %dB..\n", 
                       __FILE__, __FUNCTION__, bytes_read, blk_size);
        
        return buf;        
}


void getlinsec(char *buf, int sector, int sector_cnt)
{
        int bytes_read;

        if ( lseek(fd, sector*512, SEEK_SET) < 0 ) {
                printf("seek file ext2.img error ....\n");
                return;
        }

        if ( (bytes_read = read(fd, buf, 512*sector_cnt)) < 512*sector_cnt) 
                printf("%s:%s: read %d bytes less than %d bytes..\n", 
                       __FILE__, __FUNCTION__, bytes_read, 512 * sector_cnt);
        
}