Struct memfd::Memfd

source · [−]

pub struct Memfd { /* private fields */ }

Expand description

An anonymous volatile file, with sealing capabilities.

Implementations

impl Memfd

pub fn try_from_fd<F>(fd: F) -> Result<Self, F> where
F: AsRawFd + IntoRawFd,

Try to convert an object that owns a file descriptor into a Memfd.

This function consumes the ownership of the specified object. If the underlying file-descriptor is compatible with memfd/sealing, a Memfd object is returned. Otherwise the supplied object is returned as error.

pub fn try_from_file(file: File) -> Result<Self, File>

Try to convert a File object into a Memfd.

This function consumes the ownership of the specified File. If the underlying file-descriptor is compatible with memfd/sealing, a Memfd object is returned. Otherwise the supplied File is returned for further usage.

pub const fn as_file(&self) -> &File

Return a reference to the backing File.

pub fn into_file(self) -> File

Convert Memfd to the backing File.

pub fn seals(&self) -> Result<SealsHashSet, Error>

Obtain the current set of seals for the Memfd.

pub fn add_seal(&self, seal: FileSeal) -> Result<(), Error>

Add a seal to the existing set of seals.

pub fn add_seals<'a>(
&self,
seals: impl IntoIterator<Item = &'a FileSeal>
) -> Result<(), Error>

Add some seals to the existing set of seals.

Trait Implementations

impl AsRawFd for Memfd

fn as_raw_fd(&self) -> RawFd

Extracts the raw file descriptor. Read more

impl Debug for Memfd

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

Formats the value using the given formatter. Read more

impl FromRawFd for Memfd

unsafe fn from_raw_fd(fd: RawFd) -> Self

Convert a raw file-descriptor to a Memfd.

This function consumes ownership of the specified file descriptor. Memfd will take responsibility for closing it when the object goes out of scope.

Safety

fd must be a valid file descriptor representing a memfd file.

impl IntoRawFd for Memfd

fn into_raw_fd(self) -> RawFd

Consumes this object, returning the raw underlying file descriptor. Read more

Auto Trait Implementations

impl RefUnwindSafe for Memfd

impl Send for Memfd

impl Sync for Memfd

impl Unpin for Memfd

impl UnwindSafe for Memfd

Blanket Implementations

impl<T> Any for T where
T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> AsRawFilelike for T where
T: AsRawFd,

fn as_raw_filelike(&self) -> i32

Returns the raw value.

impl<T> AsRawSocketlike for T where
T: AsRawFd,

fn as_raw_socketlike(&self) -> i32

Returns the raw value.

impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

impl<T> FromRawFilelike for T where
T: FromRawFd,

unsafe fn from_raw_filelike(raw: i32) -> T

Constructs Self from the raw value. Read more

impl<T> FromRawSocketlike for T where
T: FromRawFd,

unsafe fn from_raw_socketlike(raw: i32) -> T

Constructs Self from the raw value. Read more

impl<T, U> Into<U> for T where
U: From<T>,

const: unstable · source

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T> IntoRawFilelike for T where
T: IntoRawFd,

fn into_raw_filelike(self) -> i32

Returns the raw value.

impl<T> IntoRawSocketlike for T where
T: IntoRawFd,

fn into_raw_socketlike(self) -> i32

Returns the raw value.

impl<T, U> TryFrom<U> for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.