Struct Memfd

pub struct Memfd { /* private fields */ }

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.

impl Debug for Memfd

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

Formats the value using the given formatter.

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.