Pascal Bourguignon wrote:
> In unix, disks are files like any other file. So if your programming
> language allows you to read and write files, it allows you to read and
> write disks.
>
> Just write the equivalent of:
>
> int fd=open("/dev/hda",O_RDWR,0);
> if(0<==fd){
> check_errors(lseek(fd,SECT_SIZE*sect_num,SEEK_SET));
> check_errors(read(fd,buffer,SECT_SIZE));
> modify(buffer);
> check_errors(lseek(fd,SECT_SIZE*sect_num,SEEK_SET));
> check_errors(write(fd,buffer,SECT_SIZE));
> close(fd); }
>
> and be sure to have the access rights on /dev/hda (and to know what
> you're doing!).
This means in practice that your program has to run
with root rights to handle complete disks or partitions.
Are you attempting to create a boot block virus?
--
Tauno Voipio
tauno voipio (at) iki fi
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