#include	<unistd.h>
#include	<stdio.h>
#include	<fcntl.h>

int	main(int argc,char *argv[])
{
	int	FileHandle ;
	char	*FileName="/var/tmp/SampleBigFile" ;

	FileHandle = open(FileName,O_CREAT|O_RDWR,0644) ;
	if(FileHandle==-1)
		perror("Cannot open file") ;
	else {
		if(lseek(FileHandle,1024*1024*10,SEEK_SET)==-1)
			perror("Cannot seek to the required position") ;
		else if(write(FileHandle,"l",1)==-1)
			perror("Cannot write to file") ;
		sleep(1000) ;
		close(FileHandle) ;
	}

	return(0) ;
}