[vox-tech] files with holes in them

[Peter Jay Salzman]

i was playing around with creating files with holes in them:

        % ls -l holy_file
        -rw-------    1 p        p        10000003 Nov 17 19:59 holy_file

        % du -k holy_file
        24      holy_file

the program i wrote to generate this file looks more or less like:

        if((fd = open("holy_file", O_WRONLY|O_CREAT)) < 0)
                exit(0);

        write(fd, string1, strlen(string1));
        lseek(fd, 99999, SEEK_SET);
        write(fd, string2, strlen(string2));

ls gets its info from stat.  i did an strace on du, and it also calls stat.
i'm curious about the discrepency in file size.  does anyone know why the
two programs report different file sizes?

pete