Struct tar::Entry

pub struct Entry<'a, R: 'a + Read> {
    // some fields omitted
}

A read-only view into an entry of an archive.

This structure is a window into a portion of a borrowed archive which can be inspected. It acts as a file handle by implementing the Reader trait. An entry cannot be rewritten once inserted into an archive.

Methods

impl<'a, R: Read> Entry<'a, R>

fn path(&self) -> Result<Cow<Path>>

Returns the path name for this entry.

This method may fail if the pathname is not valid unicode and this is called on a Windows platform.

Note that this function will convert any \ characters to directory separators, and it will not always return the same value as self.header().path() as some archive formats have support for longer path names described in separate entries.

It is recommended to use this method instead of inspecting the header directly to ensure that various archive formats are handled correctly.

fn path_bytes(&self) -> Cow<[u8]>

Returns the raw bytes listed for this entry.

Note that this function will convert any \ characters to directory separators, and it will not always return the same value as self.header().path_bytes() as some archive formats have support for longer path names described in separate entries.

fn link_name(&self) -> Result<Option<Cow<Path>>>

Returns the link name for this entry, if any is found.

This method may fail if the pathname is not valid unicode and this is called on a Windows platform. Ok(None) being returned, however, indicates that the link name was not present.

Note that this function will convert any \ characters to directory separators, and it will not always return the same value as self.header().link_name() as some archive formats have support for longer path names described in separate entries.

It is recommended to use this method instead of inspecting the header directly to ensure that various archive formats are handled correctly.

fn link_name_bytes(&self) -> Option<Cow<[u8]>>

Returns the link name for this entry, in bytes, if listed.

Note that this will not always return the same value as self.header().link_name_bytes() as some archive formats have support for longer path names described in separate entries.

fn pax_extensions(&mut self) -> Result<Option<PaxExtensions>>

Returns an iterator over the pax extensions contained in this entry.

Pax extensions are a form of archive where extra metadata is stored in key/value pairs in entries before the entry they're intended to describe. For example this can be used to describe long file name or other metadata like atime/ctime/mtime in more precision.

The returned iterator will yield key/value pairs for each extension.

None will be returned if this entry does not indicate that it itself contains extensions, or if there were no previous extensions describing it.

Note that global pax extensions are intended to be applied to all archive entries.

Also note that this function will read the entire entry if the entry itself is a list of extensions.

fn header(&self) -> &Header

Returns access to the header of this entry in the archive.

This provides access to the the metadata for this entry in the archive.

fn unpack<P: AsRef<Path>>(&mut self, dst: P) -> Result<()>

Writes this file to the specified location.

This function will write the entire contents of this file into the location specified by dst. Metadata will also be propagated to the path dst.

This function will create a file at the path dst, and it is required that the intermediate directories are created. Any existing file at the location dst will be overwritten.

Examples

use std::fs::File;
use tar::Archive;

let mut ar = Archive::new(File::open("foo.tar").unwrap());

for (i, file) in ar.entries().unwrap().enumerate() {
    let mut file = file.unwrap();
    file.unpack(format!("file-{}", i)).unwrap();
}

Trait Implementations

impl<'a, R: Read> Read for Entry<'a, R>

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

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

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, placing them into buf.

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

Read the exact number of bytes required to fill buf.

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

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

fn bytes(self) -> Bytes<Self>

Transforms this Read instance to an Iterator over its bytes.

fn chars(self) -> Chars<Self>

Unstable (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 chars.

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

Creates an adaptor which will chain this stream with another.

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

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