What other ioctl$()$ operations $($at least $5)$ might be useful for a scanner?

ioctl$()$:

$/*$ ioctl takes in a command and arguments

there is only one command, $0,$ which is used to rewrite the seperators

When the command is called flag will be set so the next write can rewrite the seperators

$*/$

static long ioctl$($struct file $*$filp$,$

unsigned int cmd$,//$ used for rewriting seperators

unsigned long arg$)\{//$ arguments used for if cmd had args

File $*$file$=$ filp$->$private$\_$data;

if $($cmd $==0)\{//$ set seperators

file$->$flag $=$ true; $//$ set flag to true

$\}$ else $\{$

$//$ do nothing, seperators are not being rewritten

$\}$

return $0$;

$\}$