Enum KargsError 

pub enum KargsError {
    BothEmpty,
}

Modify kernel arguments in GRUB_CMDLINE_LINUX_DEFAULT, back up the original file, then run update-grub.

Risk: High. Kernel argument changes affect every boot. Incorrect arguments can prevent the system from booting. The helper script writes a backup to /etc/default/grub.sysknife.bak and restores it on update-grub failure.

append — arguments to add (validated before call). delete — arguments to remove (validated before call).

At least one of append / delete MUST be non-empty — calling with both empty is a no-op that still rewrites the GRUB config and runs update-grub, which is wasteful and misleading. The constructor returns Err(KargsError::BothEmpty) in that case.

The underlying mechanism is a single sudo invocation of the root-owned helper script GRUB_KARGS_HELPER (no shell involved), which closes the unconstrained python3, cp, and update-grub sudoers grants.

Variants

BothEmpty

Trait Implementations

impl Debug for KargsError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for KargsError

fn fmt(&self, __formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for KargsError

impl Error for KargsError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl PartialEq for KargsError

fn eq(&self, other: &KargsError) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for KargsError