Struct tempfile::TempFile

pub struct TempFile(_);

An unnamed temporary file.

This variant is secure/reliable in the presence of a pathological temporary file cleaner.

Deletion:

Linux >= 3.11: The temporary file is never linked into the filesystem so it can't be leaked.

Other *nix: The temporary file is immediately unlinked on create. The OS will delete it when the last open copy of it is closed (the last TempFile reference to it is dropped).

Windows: The temporary file is marked DeleteOnClose and, again, will be deleted when the last open copy of it is closed. Unlike *nix operating systems, the file is not immediately unlinked from the filesystem.

Methods

impl TempFile

pub fn new() -> Result<TempFile>

Create a new temporary file.

pub fn new_in<P: AsRef<Path>>(dir: P) -> Result<TempFile>

Create a new temporary file in the specified directory.

pub fn shared(count: usize) -> Result<Vec<TempFile>>

Create a new temporary file and open it count times returning count independent references to the same file.

This can be useful if you want multiple seek positions in the same temporary file. Additionally, this function guarantees that all of the returned temporary file objects refer to the same underlying temporary file even in the presence of a pathological temporary file cleaner.

pub fn shared_in<P: AsRef<Path>>(dir: P, count: usize) -> Result<Vec<TempFile>>

Same as shared but creates the file in the specified directory.

pub fn len(&self) -> Result<u64>

Number of bytes in the file.

pub fn set_len(&self, size: u64) -> Result<()>

Truncate the file to size bytes.

Trait Implementations

impl Debug for TempFile

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

Formats the value using the given formatter.

impl Read for TempFile

fn read(&mut self, buf: &mut [u8]) -> Result<usize>

Pull some bytes from this source into the specified buffer, returning how many bytes were read.

unsafe fn initializer(&self) -> Initializer

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

Determines if this Reader can work with buffers of uninitialized memory.

fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize, Error>

Read all bytes until EOF in this source, placing them into buf.

fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>

Read all bytes until EOF in this source, appending them to buf.

fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Error>

Read the exact number of bytes required to fill buf.

Important traits for &'a mut R

impl<'a, R> Read for &'a mut R where
    R: Read + ?Sized, impl<'a, W> Write for &'a mut W where
    W: Write + ?Sized, impl<'a, I> Iterator for &'a mut I where
    I: Iterator + ?Sized,  type Item = <I as Iterator>::Item;

fn by_ref(&mut self) -> &mut Self

Creates a "by reference" adaptor for this instance of Read.

Important traits for Bytes<R>

impl<R> Iterator for Bytes<R> where
    R: Read,  type Item = Result<u8, Error>;

fn bytes(self) -> Bytes<Self>

Transforms this Read instance to an [Iterator] over its bytes.

Important traits for Chars<R>

impl<R> Iterator for Chars<R> where
    R: Read,  type Item = Result<char, CharsError>;

fn chars(self) -> Chars<Self>

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

the semantics of a partial read/write of where errors happen is currently unclear and may change

Transforms this Read instance to an [Iterator] over [char]s.

Important traits for Chain<T, U>

impl<T, U> Read for Chain<T, U> where
    T: Read,
    U: Read, 

fn chain<R>(self, next: R) -> Chain<Self, R> where     R: Read,

Creates an adaptor which will chain this stream with another.

Important traits for Take<T>

impl<T> Read for Take<T> where
    T: Read, 

fn take(self, limit: u64) -> Take<Self>

Creates an adaptor which will read at most limit bytes from it.

impl Write for TempFile

fn write(&mut self, buf: &[u8]) -> Result<usize>

Write a buffer into this object, returning how many bytes were written.

fn flush(&mut self) -> Result<()>

Flush this output stream, ensuring that all intermediately buffered contents reach their destination.

fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>

Attempts to write an entire buffer into this write.

fn write_fmt(&mut self, fmt: Arguments) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered.

Important traits for &'a mut R

impl<'a, R> Read for &'a mut R where
    R: Read + ?Sized, impl<'a, W> Write for &'a mut W where
    W: Write + ?Sized, impl<'a, I> Iterator for &'a mut I where
    I: Iterator + ?Sized,  type Item = <I as Iterator>::Item;

fn by_ref(&mut self) -> &mut Self

Creates a "by reference" adaptor for this instance of Write.

impl Seek for TempFile

fn seek(&mut self, pos: SeekFrom) -> Result<u64>

Seek to an offset, in bytes, in a stream.

impl AsRawFd for TempFile

fn as_raw_fd(&self) -> RawFd

Extracts the raw file descriptor.