tar-0.4.26/.gitignore010066400017500001750000000000241236760601300126040ustar0000000000000000/target /Cargo.lock tar-0.4.26/.travis.yml010066400017500001750000000007571341754632400127470ustar0000000000000000language: rust matrix: include: - rust: stable - rust: beta - rust: nightly - name: "master doc to gh-pages" rust: nightly script: - cargo doc --no-deps deploy: provider: script script: curl -LsSf https://git.io/fhJ8n | rustc - && (cd target/doc && ../../rust_out) skip_cleanup: true on: branch: master script: - cargo test - cargo test --no-default-features notifications: email: on_success: never tar-0.4.26/Cargo.toml.orig010066400017500001750000000017061346761374000135220ustar0000000000000000[package] name = "tar" version = "0.4.26" authors = ["Alex Crichton "] homepage = "https://github.com/alexcrichton/tar-rs" repository = "https://github.com/alexcrichton/tar-rs" documentation = "https://docs.rs/tar" license = "MIT/Apache-2.0" keywords = ["tar", "tarfile", "encoding"] readme = "README.md" edition = "2018" exclude = ["tests/archives/*"] description = """ A Rust implementation of a TAR file reader and writer. This library does not currently handle compression, but it is abstract over all I/O readers and writers. Additionally, great lengths are taken to ensure that the entire contents are never required to be entirely resident in memory all at once. """ [dependencies] filetime = "0.2.6" [dev-dependencies] tempdir = "0.3" [target."cfg(unix)".dependencies] xattr = { version = "0.2", optional = true } libc = "0.2" [target.'cfg(target_os = "redox")'.dependencies] redox_syscall = "0.1" [features] default = ["xattr"] tar-0.4.26/Cargo.toml0000644000000030130000000000000077450ustar00# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO # # When uploading crates to the registry Cargo will automatically # "normalize" Cargo.toml files for maximal compatibility # with all versions of Cargo and also rewrite `path` dependencies # to registry (e.g., crates.io) dependencies # # If you believe there's an error in this file please file an # issue against the rust-lang/cargo repository. If you're # editing this file be aware that the upstream Cargo.toml # will likely look very different (and much more reasonable) [package] edition = "2018" name = "tar" version = "0.4.26" authors = ["Alex Crichton "] exclude = ["tests/archives/*"] description = "A Rust implementation of a TAR file reader and writer. This library does not\ncurrently handle compression, but it is abstract over all I/O readers and\nwriters. Additionally, great lengths are taken to ensure that the entire\ncontents are never required to be entirely resident in memory all at once.\n" homepage = "https://github.com/alexcrichton/tar-rs" documentation = "https://docs.rs/tar" readme = "README.md" keywords = ["tar", "tarfile", "encoding"] license = "MIT/Apache-2.0" repository = "https://github.com/alexcrichton/tar-rs" [dependencies.filetime] version = "0.2.6" [dev-dependencies.tempdir] version = "0.3" [features] default = ["xattr"] [target."cfg(target_os = \"redox\")".dependencies.redox_syscall] version = "0.1" [target."cfg(unix)".dependencies.libc] version = "0.2" [target."cfg(unix)".dependencies.xattr] version = "0.2" optional = true tar-0.4.26/LICENSE-APACHE010066400017500001750000000251371274351400000125440ustar0000000000000000 Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. Definitions. 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See the License for the specific language governing permissions and limitations under the License. tar-0.4.26/LICENSE-MIT010066400017500001750000000020411274351400000122410ustar0000000000000000Copyright (c) 2014 Alex Crichton Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. tar-0.4.26/README.md010066400017500001750000000041041341754632400121030ustar0000000000000000# tar-rs [![Build Status](https://travis-ci.com/alexcrichton/tar-rs.svg?branch=master)](https://travis-ci.com/alexcrichton/tar-rs) [![Build status](https://ci.appveyor.com/api/projects/status/0udgokm2fc6ljorj?svg=true)](https://ci.appveyor.com/project/alexcrichton/tar-rs) [![Coverage Status](https://coveralls.io/repos/alexcrichton/tar-rs/badge.svg?branch=master&service=github)](https://coveralls.io/github/alexcrichton/tar-rs?branch=master) [Documentation](https://docs.rs/tar) A tar archive reading/writing library for Rust. ```toml # Cargo.toml [dependencies] tar = "0.4" ``` ## Reading an archive ```rust,no_run extern crate tar; use std::io::prelude::*; use std::fs::File; use tar::Archive; fn main() { let file = File::open("foo.tar").unwrap(); let mut a = Archive::new(file); for file in a.entries().unwrap() { // Make sure there wasn't an I/O error let mut file = file.unwrap(); // Inspect metadata about the file println!("{:?}", file.header().path().unwrap()); println!("{}", file.header().size().unwrap()); // files implement the Read trait let mut s = String::new(); file.read_to_string(&mut s).unwrap(); println!("{}", s); } } ``` ## Writing an archive ```rust,no_run extern crate tar; use std::io::prelude::*; use std::fs::File; use tar::Builder; fn main() { let file = File::create("foo.tar").unwrap(); let mut a = Builder::new(file); a.append_path("file1.txt").unwrap(); a.append_file("file2.txt", &mut File::open("file3.txt").unwrap()).unwrap(); } ``` # License This project is licensed under either of * Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0) * MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT) at your option. ### Contribution Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in this project by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions. tar-0.4.26/appveyor.yml010066400017500001750000000011351277702424400132150ustar0000000000000000environment: matrix: - TARGET: x86_64-pc-windows-gnu MSYS_BITS: 64 - TARGET: i686-pc-windows-gnu MSYS_BITS: 32 - TARGET: x86_64-pc-windows-msvc - TARGET: i686-pc-windows-msvc install: - ps: Start-FileDownload "https://static.rust-lang.org/dist/rust-nightly-${env:TARGET}.exe" - rust-nightly-%TARGET%.exe /VERYSILENT /NORESTART /DIR="C:\Program Files (x86)\Rust" - SET PATH=%PATH%;C:\Program Files (x86)\Rust\bin - if defined MSYS_BITS set PATH=%PATH%;C:\msys64\mingw%MSYS_BITS%\bin - rustc -V - cargo -V build: false test_script: - cargo test --verbose --target %TARGET% tar-0.4.26/examples/extract_file.rs010066400017500001750000000012551332645215500154620ustar0000000000000000//! An example of extracting a file in an archive. //! //! Takes a tarball on standard input, looks for an entry with a listed file //! name as the first argument provided, and then prints the contents of that //! file to stdout. extern crate tar; use std::env::args_os; use std::io::{copy, stdin, stdout}; use std::path::Path; use tar::Archive; fn main() { let first_arg = args_os().skip(1).next().unwrap(); let filename = Path::new(&first_arg); let mut ar = Archive::new(stdin()); for file in ar.entries().unwrap() { let mut f = file.unwrap(); if f.path().unwrap() == filename { copy(&mut f, &mut stdout()).unwrap(); } } } tar-0.4.26/examples/list.rs010066400017500001750000000006021331500267700137550ustar0000000000000000//! An example of listing the file names of entries in an archive. //! //! Takes a tarball on stdin and prints out all of the entries inside. extern crate tar; use std::io::stdin; use tar::Archive; fn main() { let mut ar = Archive::new(stdin()); for file in ar.entries().unwrap() { let f = file.unwrap(); println!("{}", f.path().unwrap().display()); } } tar-0.4.26/examples/raw_list.rs010066400017500001750000000033051337304063300146270ustar0000000000000000//! An example of listing raw entries in an archive. //! //! Takes a tarball on stdin and prints out all of the entries inside. extern crate tar; use std::io::stdin; use tar::Archive; fn main() { let mut ar = Archive::new(stdin()); for (i, file) in ar.entries().unwrap().raw(true).enumerate() { println!("-------------------------- Entry {}", i); let mut f = file.unwrap(); println!("path: {}", f.path().unwrap().display()); println!("size: {}", f.header().size().unwrap()); println!("entry size: {}", f.header().entry_size().unwrap()); println!("link name: {:?}", f.link_name().unwrap()); println!("file type: {:#x}", f.header().entry_type().as_byte()); println!("mode: {:#o}", f.header().mode().unwrap()); println!("uid: {}", f.header().uid().unwrap()); println!("gid: {}", f.header().gid().unwrap()); println!("mtime: {}", f.header().mtime().unwrap()); println!("username: {:?}", f.header().username().unwrap()); println!("groupname: {:?}", f.header().groupname().unwrap()); if f.header().as_ustar().is_some() { println!("kind: UStar"); } else if f.header().as_gnu().is_some() { println!("kind: GNU"); } else { println!("kind: normal"); } if let Ok(Some(extensions)) = f.pax_extensions() { println!("pax extensions:"); for e in extensions { let e = e.unwrap(); println!( "\t{:?} = {:?}", String::from_utf8_lossy(e.key_bytes()), String::from_utf8_lossy(e.value_bytes()) ); } } } } tar-0.4.26/examples/write.rs010066400017500001750000000004351332645215500141420ustar0000000000000000extern crate tar; use std::fs::File; use tar::Builder; fn main() { let file = File::create("foo.tar").unwrap(); let mut a = Builder::new(file); a.append_path("README.md").unwrap(); a.append_file("lib.rs", &mut File::open("src/lib.rs").unwrap()) .unwrap(); } tar-0.4.26/src/archive.rs010066400017500001750000000402561345141053500134020ustar0000000000000000use std::cell::{Cell, RefCell}; use std::cmp; use std::io; use std::io::prelude::*; use std::marker; use std::path::Path; use crate::entry::{EntryFields, EntryIo}; use crate::error::TarError; use crate::other; use crate::{Entry, GnuExtSparseHeader, GnuSparseHeader, Header}; /// A top-level representation of an archive file. /// /// This archive can have an entry added to it and it can be iterated over. pub struct Archive { inner: ArchiveInner, } pub struct ArchiveInner { pos: Cell, unpack_xattrs: bool, preserve_permissions: bool, preserve_mtime: bool, ignore_zeros: bool, obj: RefCell, } /// An iterator over the entries of an archive. pub struct Entries<'a, R: 'a + Read> { fields: EntriesFields<'a>, _ignored: marker::PhantomData<&'a Archive>, } struct EntriesFields<'a> { archive: &'a Archive, next: u64, done: bool, raw: bool, } impl Archive { /// Create a new archive with the underlying object as the reader. pub fn new(obj: R) -> Archive { Archive { inner: ArchiveInner { unpack_xattrs: false, preserve_permissions: false, preserve_mtime: true, ignore_zeros: false, obj: RefCell::new(obj), pos: Cell::new(0), }, } } /// Unwrap this archive, returning the underlying object. pub fn into_inner(self) -> R { self.inner.obj.into_inner() } /// Construct an iterator over the entries in this archive. /// /// Note that care must be taken to consider each entry within an archive in /// sequence. If entries are processed out of sequence (from what the /// iterator returns), then the contents read for each entry may be /// corrupted. pub fn entries(&mut self) -> io::Result> { let me: &mut Archive = self; me._entries().map(|fields| Entries { fields: fields, _ignored: marker::PhantomData, }) } /// Unpacks the contents tarball into the specified `dst`. /// /// This function will iterate over the entire contents of this tarball, /// extracting each file in turn to the location specified by the entry's /// path name. /// /// This operation is relatively sensitive in that it will not write files /// outside of the path specified by `dst`. Files in the archive which have /// a '..' in their path are skipped during the unpacking process. /// /// # Examples /// /// ```no_run /// use std::fs::File; /// use tar::Archive; /// /// let mut ar = Archive::new(File::open("foo.tar").unwrap()); /// ar.unpack("foo").unwrap(); /// ``` pub fn unpack>(&mut self, dst: P) -> io::Result<()> { let me: &mut Archive = self; me._unpack(dst.as_ref()) } /// Indicate whether extended file attributes (xattrs on Unix) are preserved /// when unpacking this archive. /// /// This flag is disabled by default and is currently only implemented on /// Unix using xattr support. This may eventually be implemented for /// Windows, however, if other archive implementations are found which do /// this as well. pub fn set_unpack_xattrs(&mut self, unpack_xattrs: bool) { self.inner.unpack_xattrs = unpack_xattrs; } /// Indicate whether extended permissions (like suid on Unix) are preserved /// when unpacking this entry. /// /// This flag is disabled by default and is currently only implemented on /// Unix. pub fn set_preserve_permissions(&mut self, preserve: bool) { self.inner.preserve_permissions = preserve; } /// Indicate whether access time information is preserved when unpacking /// this entry. /// /// This flag is enabled by default. pub fn set_preserve_mtime(&mut self, preserve: bool) { self.inner.preserve_mtime = preserve; } /// Ignore zeroed headers, which would otherwise indicate to the archive that it has no more /// entries. /// /// This can be used in case multiple tar archives have been concatenated together. pub fn set_ignore_zeros(&mut self, ignore_zeros: bool) { self.inner.ignore_zeros = ignore_zeros; } } impl<'a> Archive { fn _entries(&mut self) -> io::Result { if self.inner.pos.get() != 0 { return Err(other( "cannot call entries unless archive is at \ position 0", )); } Ok(EntriesFields { archive: self, done: false, next: 0, raw: false, }) } fn _unpack(&mut self, dst: &Path) -> io::Result<()> { for entry in self._entries()? { let mut file = entry.map_err(|e| TarError::new("failed to iterate over archive", e))?; file.unpack_in(dst)?; } Ok(()) } fn skip(&self, mut amt: u64) -> io::Result<()> { let mut buf = [0u8; 4096 * 8]; while amt > 0 { let n = cmp::min(amt, buf.len() as u64); let n = (&self.inner).read(&mut buf[..n as usize])?; if n == 0 { return Err(other("unexpected EOF during skip")); } amt -= n as u64; } Ok(()) } } impl<'a, R: Read> Entries<'a, R> { /// Indicates whether this iterator will return raw entries or not. /// /// If the raw list of entries are returned, then no preprocessing happens /// on account of this library, for example taking into accout GNU long name /// or long link archive members. Raw iteration is disabled by default. pub fn raw(self, raw: bool) -> Entries<'a, R> { Entries { fields: EntriesFields { raw: raw, ..self.fields }, _ignored: marker::PhantomData, } } } impl<'a, R: Read> Iterator for Entries<'a, R> { type Item = io::Result>; fn next(&mut self) -> Option>> { self.fields .next() .map(|result| result.map(|e| EntryFields::from(e).into_entry())) } } impl<'a> EntriesFields<'a> { fn next_entry_raw(&mut self) -> io::Result>> { let mut header = Header::new_old(); let mut header_pos = self.next; loop { // Seek to the start of the next header in the archive let delta = self.next - self.archive.inner.pos.get(); self.archive.skip(delta)?; // EOF is an indicator that we are at the end of the archive. if !try_read_all(&mut &self.archive.inner, header.as_mut_bytes())? { return Ok(None); } // If a header is not all zeros, we have another valid header. // Otherwise, check if we are ignoring zeros and continue, or break as if this is the // end of the archive. if !header.as_bytes().iter().all(|i| *i == 0) { self.next += 512; break; } if !self.archive.inner.ignore_zeros { return Ok(None); } self.next += 512; header_pos = self.next; } // Make sure the checksum is ok let sum = header.as_bytes()[..148] .iter() .chain(&header.as_bytes()[156..]) .fold(0, |a, b| a + (*b as u32)) + 8 * 32; let cksum = header.cksum()?; if sum != cksum { return Err(other("archive header checksum mismatch")); } let file_pos = self.next; let size = header.entry_size()?; let ret = EntryFields { size: size, header_pos: header_pos, file_pos: file_pos, data: vec![EntryIo::Data((&self.archive.inner).take(size))], header: header, long_pathname: None, long_linkname: None, pax_extensions: None, unpack_xattrs: self.archive.inner.unpack_xattrs, preserve_permissions: self.archive.inner.preserve_permissions, preserve_mtime: self.archive.inner.preserve_mtime, }; // Store where the next entry is, rounding up by 512 bytes (the size of // a header); let size = (size + 511) & !(512 - 1); self.next += size; Ok(Some(ret.into_entry())) } fn next_entry(&mut self) -> io::Result>> { if self.raw { return self.next_entry_raw(); } let mut gnu_longname = None; let mut gnu_longlink = None; let mut pax_extensions = None; let mut processed = 0; loop { processed += 1; let entry = match self.next_entry_raw()? { Some(entry) => entry, None if processed > 1 => { return Err(other( "members found describing a future member \ but no future member found", )); } None => return Ok(None), }; if entry.header().as_gnu().is_some() && entry.header().entry_type().is_gnu_longname() { if gnu_longname.is_some() { return Err(other( "two long name entries describing \ the same member", )); } gnu_longname = Some(EntryFields::from(entry).read_all()?); continue; } if entry.header().as_gnu().is_some() && entry.header().entry_type().is_gnu_longlink() { if gnu_longlink.is_some() { return Err(other( "two long name entries describing \ the same member", )); } gnu_longlink = Some(EntryFields::from(entry).read_all()?); continue; } if entry.header().as_ustar().is_some() && entry.header().entry_type().is_pax_local_extensions() { if pax_extensions.is_some() { return Err(other( "two pax extensions entries describing \ the same member", )); } pax_extensions = Some(EntryFields::from(entry).read_all()?); continue; } let mut fields = EntryFields::from(entry); fields.long_pathname = gnu_longname; fields.long_linkname = gnu_longlink; fields.pax_extensions = pax_extensions; self.parse_sparse_header(&mut fields)?; return Ok(Some(fields.into_entry())); } } fn parse_sparse_header(&mut self, entry: &mut EntryFields<'a>) -> io::Result<()> { if !entry.header.entry_type().is_gnu_sparse() { return Ok(()); } let gnu = match entry.header.as_gnu() { Some(gnu) => gnu, None => return Err(other("sparse entry type listed but not GNU header")), }; // Sparse files are represented internally as a list of blocks that are // read. Blocks are either a bunch of 0's or they're data from the // underlying archive. // // Blocks of a sparse file are described by the `GnuSparseHeader` // structure, some of which are contained in `GnuHeader` but some of // which may also be contained after the first header in further // headers. // // We read off all the blocks here and use the `add_block` function to // incrementally add them to the list of I/O block (in `entry.data`). // The `add_block` function also validates that each chunk comes after // the previous, we don't overrun the end of the file, and each block is // aligned to a 512-byte boundary in the archive itself. // // At the end we verify that the sparse file size (`Header::size`) is // the same as the current offset (described by the list of blocks) as // well as the amount of data read equals the size of the entry // (`Header::entry_size`). entry.data.truncate(0); let mut cur = 0; let mut remaining = entry.size; { let data = &mut entry.data; let reader = &self.archive.inner; let size = entry.size; let mut add_block = |block: &GnuSparseHeader| -> io::Result<_> { if block.is_empty() { return Ok(()); } let off = block.offset()?; let len = block.length()?; if (size - remaining) % 512 != 0 { return Err(other( "previous block in sparse file was not \ aligned to 512-byte boundary", )); } else if off < cur { return Err(other( "out of order or overlapping sparse \ blocks", )); } else if cur < off { let block = io::repeat(0).take(off - cur); data.push(EntryIo::Pad(block)); } cur = off .checked_add(len) .ok_or_else(|| other("more bytes listed in sparse file than u64 can hold"))?; remaining = remaining.checked_sub(len).ok_or_else(|| { other( "sparse file consumed more data than the header \ listed", ) })?; data.push(EntryIo::Data(reader.take(len))); Ok(()) }; for block in gnu.sparse.iter() { add_block(block)? } if gnu.is_extended() { let mut ext = GnuExtSparseHeader::new(); ext.isextended[0] = 1; while ext.is_extended() { if !try_read_all(&mut &self.archive.inner, ext.as_mut_bytes())? { return Err(other("failed to read extension")); } self.next += 512; for block in ext.sparse.iter() { add_block(block)?; } } } } if cur != gnu.real_size()? { return Err(other( "mismatch in sparse file chunks and \ size in header", )); } entry.size = cur; if remaining > 0 { return Err(other( "mismatch in sparse file chunks and \ entry size in header", )); } Ok(()) } } impl<'a> Iterator for EntriesFields<'a> { type Item = io::Result>; fn next(&mut self) -> Option>> { if self.done { None } else { match self.next_entry() { Ok(Some(e)) => Some(Ok(e)), Ok(None) => { self.done = true; None } Err(e) => { self.done = true; Some(Err(e)) } } } } } impl<'a, R: ?Sized + Read> Read for &'a ArchiveInner { fn read(&mut self, into: &mut [u8]) -> io::Result { self.obj.borrow_mut().read(into).map(|i| { self.pos.set(self.pos.get() + i as u64); i }) } } /// Try to fill the buffer from the reader. /// /// If the reader reaches its end before filling the buffer at all, returns `false`. /// Otherwise returns `true`. fn try_read_all(r: &mut R, buf: &mut [u8]) -> io::Result { let mut read = 0; while read < buf.len() { match r.read(&mut buf[read..])? { 0 => { if read == 0 { return Ok(false); } return Err(other("failed to read entire block")); } n => read += n, } } Ok(true) } tar-0.4.26/src/builder.rs010066400017500001750000000443751345141053500134150ustar0000000000000000use std::borrow::Cow; use std::fs; use std::io; use std::io::prelude::*; use std::path::Path; use crate::header::{bytes2path, path2bytes, HeaderMode}; use crate::{other, EntryType, Header}; /// A structure for building archives /// /// This structure has methods for building up an archive from scratch into any /// arbitrary writer. pub struct Builder { mode: HeaderMode, follow: bool, finished: bool, obj: Option, } impl Builder { /// Create a new archive builder with the underlying object as the /// destination of all data written. The builder will use /// `HeaderMode::Complete` by default. pub fn new(obj: W) -> Builder { Builder { mode: HeaderMode::Complete, follow: true, finished: false, obj: Some(obj), } } /// Changes the HeaderMode that will be used when reading fs Metadata for /// methods that implicitly read metadata for an input Path. Notably, this /// does _not_ apply to `append(Header)`. pub fn mode(&mut self, mode: HeaderMode) { self.mode = mode; } /// Follow symlinks, archiving the contents of the file they point to rather /// than adding a symlink to the archive. Defaults to true. pub fn follow_symlinks(&mut self, follow: bool) { self.follow = follow; } /// Gets shared reference to the underlying object. pub fn get_ref(&self) -> &W { self.obj.as_ref().unwrap() } /// Gets mutable reference to the underlying object. /// /// Note that care must be taken while writing to the underlying /// object. But, e.g. `get_mut().flush()` is clamed to be safe and /// useful in the situations when one needs to be ensured that /// tar entry was flushed to the disk. pub fn get_mut(&mut self) -> &mut W { self.obj.as_mut().unwrap() } /// Unwrap this archive, returning the underlying object. /// /// This function will finish writing the archive if the `finish` function /// hasn't yet been called, returning any I/O error which happens during /// that operation. pub fn into_inner(mut self) -> io::Result { if !self.finished { self.finish()?; } Ok(self.obj.take().unwrap()) } /// Adds a new entry to this archive. /// /// This function will append the header specified, followed by contents of /// the stream specified by `data`. To produce a valid archive the `size` /// field of `header` must be the same as the length of the stream that's /// being written. Additionally the checksum for the header should have been /// set via the `set_cksum` method. /// /// Note that this will not attempt to seek the archive to a valid position, /// so if the archive is in the middle of a read or some other similar /// operation then this may corrupt the archive. /// /// Also note that after all entries have been written to an archive the /// `finish` function needs to be called to finish writing the archive. /// /// # Errors /// /// This function will return an error for any intermittent I/O error which /// occurs when either reading or writing. /// /// # Examples /// /// ``` /// use tar::{Builder, Header}; /// /// let mut header = Header::new_gnu(); /// header.set_path("foo").unwrap(); /// header.set_size(4); /// header.set_cksum(); /// /// let mut data: &[u8] = &[1, 2, 3, 4]; /// /// let mut ar = Builder::new(Vec::new()); /// ar.append(&header, data).unwrap(); /// let data = ar.into_inner().unwrap(); /// ``` pub fn append(&mut self, header: &Header, mut data: R) -> io::Result<()> { append(self.get_mut(), header, &mut data) } /// Adds a new entry to this archive with the specified path. /// /// This function will set the specified path in the given header, which may /// require appending a GNU long-name extension entry to the archive first. /// The checksum for the header will be automatically updated via the /// `set_cksum` method after setting the path. No other metadata in the /// header will be modified. /// /// Then it will append the header, followed by contents of the stream /// specified by `data`. To produce a valid archive the `size` field of /// `header` must be the same as the length of the stream that's being /// written. /// /// Note that this will not attempt to seek the archive to a valid position, /// so if the archive is in the middle of a read or some other similar /// operation then this may corrupt the archive. /// /// Also note that after all entries have been written to an archive the /// `finish` function needs to be called to finish writing the archive. /// /// # Errors /// /// This function will return an error for any intermittent I/O error which /// occurs when either reading or writing. /// /// # Examples /// /// ``` /// use tar::{Builder, Header}; /// /// let mut header = Header::new_gnu(); /// header.set_size(4); /// header.set_cksum(); /// /// let mut data: &[u8] = &[1, 2, 3, 4]; /// /// let mut ar = Builder::new(Vec::new()); /// ar.append_data(&mut header, "really/long/path/to/foo", data).unwrap(); /// let data = ar.into_inner().unwrap(); /// ``` pub fn append_data, R: Read>( &mut self, header: &mut Header, path: P, data: R, ) -> io::Result<()> { prepare_header_path(self.get_mut(), header, path.as_ref())?; header.set_cksum(); self.append(&header, data) } /// Adds a file on the local filesystem to this archive. /// /// This function will open the file specified by `path` and insert the file /// into the archive with the appropriate metadata set, returning any I/O /// error which occurs while writing. The path name for the file inside of /// this archive will be the same as `path`, and it is required that the /// path is a relative path. /// /// Note that this will not attempt to seek the archive to a valid position, /// so if the archive is in the middle of a read or some other similar /// operation then this may corrupt the archive. /// /// Also note that after all files have been written to an archive the /// `finish` function needs to be called to finish writing the archive. /// /// # Examples /// /// ```no_run /// use tar::Builder; /// /// let mut ar = Builder::new(Vec::new()); /// /// ar.append_path("foo/bar.txt").unwrap(); /// ``` pub fn append_path>(&mut self, path: P) -> io::Result<()> { let mode = self.mode.clone(); let follow = self.follow; append_path_with_name(self.get_mut(), path.as_ref(), None, mode, follow) } /// Adds a file on the local filesystem to this archive under another name. /// /// This function will open the file specified by `path` and insert the file /// into the archive as `name` with appropriate metadata set, returning any /// I/O error which occurs while writing. The path name for the file inside /// of this archive will be `name` and `path` is required to be a relative /// path. /// /// Note that this will not attempt to seek the archive to a valid position, /// so if the archive is in the middle of a read or some other similar /// operation then this may corrupt the archive. /// /// Also note that after all files have been written to an archive the /// `finish` function needs to be called to finish writing the archive. /// /// # Examples /// /// ```no_run /// use tar::Builder; /// /// let mut ar = Builder::new(Vec::new()); /// /// // Insert the local file "foo/bar.txt" in the archive but with the name /// // "bar/foo.txt". /// ar.append_path_with_name("foo/bar.txt", "bar/foo.txt").unwrap(); /// ``` pub fn append_path_with_name, N: AsRef>( &mut self, path: P, name: N, ) -> io::Result<()> { let mode = self.mode.clone(); let follow = self.follow; append_path_with_name( self.get_mut(), path.as_ref(), Some(name.as_ref()), mode, follow, ) } /// Adds a file to this archive with the given path as the name of the file /// in the archive. /// /// This will use the metadata of `file` to populate a `Header`, and it will /// then append the file to the archive with the name `path`. /// /// Note that this will not attempt to seek the archive to a valid position, /// so if the archive is in the middle of a read or some other similar /// operation then this may corrupt the archive. /// /// Also note that after all files have been written to an archive the /// `finish` function needs to be called to finish writing the archive. /// /// # Examples /// /// ```no_run /// use std::fs::File; /// use tar::Builder; /// /// let mut ar = Builder::new(Vec::new()); /// /// // Open the file at one location, but insert it into the archive with a /// // different name. /// let mut f = File::open("foo/bar/baz.txt").unwrap(); /// ar.append_file("bar/baz.txt", &mut f).unwrap(); /// ``` pub fn append_file>(&mut self, path: P, file: &mut fs::File) -> io::Result<()> { let mode = self.mode.clone(); append_file(self.get_mut(), path.as_ref(), file, mode) } /// Adds a directory to this archive with the given path as the name of the /// directory in the archive. /// /// This will use `stat` to populate a `Header`, and it will then append the /// directory to the archive with the name `path`. /// /// Note that this will not attempt to seek the archive to a valid position, /// so if the archive is in the middle of a read or some other similar /// operation then this may corrupt the archive. /// /// Also note that after all files have been written to an archive the /// `finish` function needs to be called to finish writing the archive. /// /// # Examples /// /// ``` /// use std::fs; /// use tar::Builder; /// /// let mut ar = Builder::new(Vec::new()); /// /// // Use the directory at one location, but insert it into the archive /// // with a different name. /// ar.append_dir("bardir", ".").unwrap(); /// ``` pub fn append_dir(&mut self, path: P, src_path: Q) -> io::Result<()> where P: AsRef, Q: AsRef, { let mode = self.mode.clone(); append_dir(self.get_mut(), path.as_ref(), src_path.as_ref(), mode) } /// Adds a directory and all of its contents (recursively) to this archive /// with the given path as the name of the directory in the archive. /// /// Note that this will not attempt to seek the archive to a valid position, /// so if the archive is in the middle of a read or some other similar /// operation then this may corrupt the archive. /// /// Also note that after all files have been written to an archive the /// `finish` function needs to be called to finish writing the archive. /// /// # Examples /// /// ``` /// use std::fs; /// use tar::Builder; /// /// let mut ar = Builder::new(Vec::new()); /// /// // Use the directory at one location, but insert it into the archive /// // with a different name. /// ar.append_dir_all("bardir", ".").unwrap(); /// ``` pub fn append_dir_all(&mut self, path: P, src_path: Q) -> io::Result<()> where P: AsRef, Q: AsRef, { let mode = self.mode.clone(); let follow = self.follow; append_dir_all( self.get_mut(), path.as_ref(), src_path.as_ref(), mode, follow, ) } /// Finish writing this archive, emitting the termination sections. /// /// This function should only be called when the archive has been written /// entirely and if an I/O error happens the underlying object still needs /// to be acquired. /// /// In most situations the `into_inner` method should be preferred. pub fn finish(&mut self) -> io::Result<()> { if self.finished { return Ok(()); } self.finished = true; self.get_mut().write_all(&[0; 1024]) } } fn append(mut dst: &mut Write, header: &Header, mut data: &mut Read) -> io::Result<()> { dst.write_all(header.as_bytes())?; let len = io::copy(&mut data, &mut dst)?; // Pad with zeros if necessary. let buf = [0; 512]; let remaining = 512 - (len % 512); if remaining < 512 { dst.write_all(&buf[..remaining as usize])?; } Ok(()) } fn append_path_with_name( dst: &mut Write, path: &Path, name: Option<&Path>, mode: HeaderMode, follow: bool, ) -> io::Result<()> { let stat = if follow { fs::metadata(path).map_err(|err| { io::Error::new( err.kind(), format!("{} when getting metadata for {}", err, path.display()), ) })? } else { fs::symlink_metadata(path).map_err(|err| { io::Error::new( err.kind(), format!("{} when getting metadata for {}", err, path.display()), ) })? }; let ar_name = name.unwrap_or(path); if stat.is_file() { append_fs(dst, ar_name, &stat, &mut fs::File::open(path)?, mode, None) } else if stat.is_dir() { append_fs(dst, ar_name, &stat, &mut io::empty(), mode, None) } else if stat.file_type().is_symlink() { let link_name = fs::read_link(path)?; append_fs( dst, ar_name, &stat, &mut io::empty(), mode, Some(&link_name), ) } else { Err(other(&format!("{} has unknown file type", path.display()))) } } fn append_file( dst: &mut Write, path: &Path, file: &mut fs::File, mode: HeaderMode, ) -> io::Result<()> { let stat = file.metadata()?; append_fs(dst, path, &stat, file, mode, None) } fn append_dir(dst: &mut Write, path: &Path, src_path: &Path, mode: HeaderMode) -> io::Result<()> { let stat = fs::metadata(src_path)?; append_fs(dst, path, &stat, &mut io::empty(), mode, None) } fn prepare_header(size: u64, entry_type: u8) -> Header { let mut header = Header::new_gnu(); let name = b"././@LongLink"; header.as_gnu_mut().unwrap().name[..name.len()].clone_from_slice(&name[..]); header.set_mode(0o644); header.set_uid(0); header.set_gid(0); header.set_mtime(0); // + 1 to be compliant with GNU tar header.set_size(size + 1); header.set_entry_type(EntryType::new(entry_type)); header.set_cksum(); header } fn prepare_header_path(dst: &mut Write, header: &mut Header, path: &Path) -> io::Result<()> { // Try to encode the path directly in the header, but if it ends up not // working (probably because it's too long) then try to use the GNU-specific // long name extension by emitting an entry which indicates that it's the // filename. if let Err(e) = header.set_path(path) { let data = path2bytes(&path)?; let max = header.as_old().name.len(); // Since e isn't specific enough to let us know the path is indeed too // long, verify it first before using the extension. if data.len() < max { return Err(e); } let header2 = prepare_header(data.len() as u64, b'L'); // null-terminated string let mut data2 = data.chain(io::repeat(0).take(1)); append(dst, &header2, &mut data2)?; // Truncate the path to store in the header we're about to emit to // ensure we've got something at least mentioned. let path = bytes2path(Cow::Borrowed(&data[..max]))?; header.set_path(&path)?; } Ok(()) } fn prepare_header_link(dst: &mut Write, header: &mut Header, link_name: &Path) -> io::Result<()> { // Same as previous function but for linkname if let Err(e) = header.set_link_name(&link_name) { let data = path2bytes(&link_name)?; if data.len() < header.as_old().linkname.len() { return Err(e); } let header2 = prepare_header(data.len() as u64, b'K'); let mut data2 = data.chain(io::repeat(0).take(1)); append(dst, &header2, &mut data2)?; } Ok(()) } fn append_fs( dst: &mut Write, path: &Path, meta: &fs::Metadata, read: &mut Read, mode: HeaderMode, link_name: Option<&Path>, ) -> io::Result<()> { let mut header = Header::new_gnu(); prepare_header_path(dst, &mut header, path)?; header.set_metadata_in_mode(meta, mode); if let Some(link_name) = link_name { prepare_header_link(dst, &mut header, link_name)?; } header.set_cksum(); append(dst, &header, read) } fn append_dir_all( dst: &mut Write, path: &Path, src_path: &Path, mode: HeaderMode, follow: bool, ) -> io::Result<()> { let mut stack = vec![(src_path.to_path_buf(), true, false)]; while let Some((src, is_dir, is_symlink)) = stack.pop() { let dest = path.join(src.strip_prefix(&src_path).unwrap()); // In case of a symlink pointing to a directory, is_dir is false, but src.is_dir() will return true if is_dir || (is_symlink && follow && src.is_dir()) { for entry in fs::read_dir(&src)? { let entry = entry?; let file_type = entry.file_type()?; stack.push((entry.path(), file_type.is_dir(), file_type.is_symlink())); } if dest != Path::new("") { append_dir(dst, &dest, &src, mode)?; } } else if !follow && is_symlink { let stat = fs::symlink_metadata(&src)?; let link_name = fs::read_link(&src)?; append_fs(dst, &dest, &stat, &mut io::empty(), mode, Some(&link_name))?; } else { append_file(dst, &dest, &mut fs::File::open(src)?, mode)?; } } Ok(()) } impl Drop for Builder { fn drop(&mut self) { let _ = self.finish(); } } tar-0.4.26/src/entry.rs010066400017500001750000000703131346760774600131420ustar0000000000000000use std::borrow::Cow; use std::cmp; use std::fs; use std::fs::OpenOptions; use std::io::prelude::*; use std::io::{self, Error, ErrorKind, SeekFrom}; use std::marker; use std::path::{Component, Path, PathBuf}; use filetime::{self, FileTime}; use crate::archive::ArchiveInner; use crate::error::TarError; use crate::header::bytes2path; use crate::other; use crate::pax::pax_extensions; use crate::{Archive, Header, PaxExtensions}; /// 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. pub struct Entry<'a, R: 'a + Read> { fields: EntryFields<'a>, _ignored: marker::PhantomData<&'a Archive>, } // private implementation detail of `Entry`, but concrete (no type parameters) // and also all-public to be constructed from other modules. pub struct EntryFields<'a> { pub long_pathname: Option>, pub long_linkname: Option>, pub pax_extensions: Option>, pub header: Header, pub size: u64, pub header_pos: u64, pub file_pos: u64, pub data: Vec>, pub unpack_xattrs: bool, pub preserve_permissions: bool, pub preserve_mtime: bool, } pub enum EntryIo<'a> { Pad(io::Take), Data(io::Take<&'a ArchiveInner>), } /// When unpacking items the unpacked thing is returned to allow custom /// additional handling by users. Today the File is returned, in future /// the enum may be extended with kinds for links, directories etc. #[derive(Debug)] pub enum Unpacked { /// A file was unpacked. File(std::fs::File), /// A directory, hardlink, symlink, or other node was unpacked. #[doc(hidden)] __Nonexhaustive, } impl<'a, R: Read> Entry<'a, R> { /// 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. pub fn path(&self) -> io::Result> { self.fields.path() } /// 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. pub fn path_bytes(&self) -> Cow<[u8]> { self.fields.path_bytes() } /// 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. pub fn link_name(&self) -> io::Result>> { self.fields.link_name() } /// 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. pub fn link_name_bytes(&self) -> Option> { self.fields.link_name_bytes() } /// 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. pub fn pax_extensions(&mut self) -> io::Result> { self.fields.pax_extensions() } /// Returns access to the header of this entry in the archive. /// /// This provides access to the the metadata for this entry in the archive. pub fn header(&self) -> &Header { &self.fields.header } /// Returns the starting position, in bytes, of the header of this entry in /// the archive. /// /// The header is always a contiguous section of 512 bytes, so if the /// underlying reader implements `Seek`, then the slice from `header_pos` to /// `header_pos + 512` contains the raw header bytes. pub fn raw_header_position(&self) -> u64 { self.fields.header_pos } /// Returns the starting position, in bytes, of the file of this entry in /// the archive. /// /// If the file of this entry is continuous (e.g. not a sparse file), and /// if the underlying reader implements `Seek`, then the slice from /// `file_pos` to `file_pos + entry_size` contains the raw file bytes. pub fn raw_file_position(&self) -> u64 { self.fields.file_pos } /// 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. /// /// > **Note**: This function does not have as many sanity checks as /// > `Archive::unpack` or `Entry::unpack_in`. As a result if you're /// > thinking of unpacking untrusted tarballs you may want to review the /// > implementations of the previous two functions and perhaps implement /// > similar logic yourself. /// /// # Examples /// /// ```no_run /// 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(); /// } /// ``` pub fn unpack>(&mut self, dst: P) -> io::Result { self.fields.unpack(None, dst.as_ref()) } /// Extracts this file under the specified path, avoiding security issues. /// /// This function will write the entire contents of this file into the /// location obtained by appending the path of this file in the archive to /// `dst`, creating any intermediate directories if needed. Metadata will /// also be propagated to the path `dst`. Any existing file at the location /// `dst` will be overwritten. /// /// This function carefully avoids writing outside of `dst`. If the file has /// a '..' in its path, this function will skip it and return false. /// /// # Examples /// /// ```no_run /// 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_in("target").unwrap(); /// } /// ``` pub fn unpack_in>(&mut self, dst: P) -> io::Result { self.fields.unpack_in(dst.as_ref()) } /// Indicate whether extended file attributes (xattrs on Unix) are preserved /// when unpacking this entry. /// /// This flag is disabled by default and is currently only implemented on /// Unix using xattr support. This may eventually be implemented for /// Windows, however, if other archive implementations are found which do /// this as well. pub fn set_unpack_xattrs(&mut self, unpack_xattrs: bool) { self.fields.unpack_xattrs = unpack_xattrs; } /// Indicate whether extended permissions (like suid on Unix) are preserved /// when unpacking this entry. /// /// This flag is disabled by default and is currently only implemented on /// Unix. pub fn set_preserve_permissions(&mut self, preserve: bool) { self.fields.preserve_permissions = preserve; } /// Indicate whether access time information is preserved when unpacking /// this entry. /// /// This flag is enabled by default. pub fn set_preserve_mtime(&mut self, preserve: bool) { self.fields.preserve_mtime = preserve; } } impl<'a, R: Read> Read for Entry<'a, R> { fn read(&mut self, into: &mut [u8]) -> io::Result { self.fields.read(into) } } impl<'a> EntryFields<'a> { pub fn from(entry: Entry) -> EntryFields { entry.fields } pub fn into_entry(self) -> Entry<'a, R> { Entry { fields: self, _ignored: marker::PhantomData, } } pub fn read_all(&mut self) -> io::Result> { // Preallocate some data but don't let ourselves get too crazy now. let cap = cmp::min(self.size, 128 * 1024); let mut v = Vec::with_capacity(cap as usize); self.read_to_end(&mut v).map(|_| v) } fn path(&self) -> io::Result> { bytes2path(self.path_bytes()) } fn path_bytes(&self) -> Cow<[u8]> { match self.long_pathname { Some(ref bytes) => { if let Some(&0) = bytes.last() { Cow::Borrowed(&bytes[..bytes.len() - 1]) } else { Cow::Borrowed(bytes) } } None => { if let Some(ref pax) = self.pax_extensions { let pax = pax_extensions(pax) .filter_map(|f| f.ok()) .find(|f| f.key_bytes() == b"path") .map(|f| f.value_bytes()); if let Some(field) = pax { return Cow::Borrowed(field); } } self.header.path_bytes() } } } /// Gets the path in a "lossy" way, used for error reporting ONLY. fn path_lossy(&self) -> String { String::from_utf8_lossy(&self.path_bytes()).to_string() } fn link_name(&self) -> io::Result>> { match self.link_name_bytes() { Some(bytes) => bytes2path(bytes).map(Some), None => Ok(None), } } fn link_name_bytes(&self) -> Option> { match self.long_linkname { Some(ref bytes) => { if let Some(&0) = bytes.last() { Some(Cow::Borrowed(&bytes[..bytes.len() - 1])) } else { Some(Cow::Borrowed(bytes)) } } None => self.header.link_name_bytes(), } } fn pax_extensions(&mut self) -> io::Result> { if self.pax_extensions.is_none() { if !self.header.entry_type().is_pax_global_extensions() && !self.header.entry_type().is_pax_local_extensions() { return Ok(None); } self.pax_extensions = Some(self.read_all()?); } Ok(Some(pax_extensions(self.pax_extensions.as_ref().unwrap()))) } fn unpack_in(&mut self, dst: &Path) -> io::Result { // Notes regarding bsdtar 2.8.3 / libarchive 2.8.3: // * Leading '/'s are trimmed. For example, `///test` is treated as // `test`. // * If the filename contains '..', then the file is skipped when // extracting the tarball. // * '//' within a filename is effectively skipped. An error is // logged, but otherwise the effect is as if any two or more // adjacent '/'s within the filename were consolidated into one // '/'. // // Most of this is handled by the `path` module of the standard // library, but we specially handle a few cases here as well. let mut file_dst = dst.to_path_buf(); { let path = self.path().map_err(|e| { TarError::new( &format!("invalid path in entry header: {}", self.path_lossy()), e, ) })?; for part in path.components() { match part { // Leading '/' characters, root paths, and '.' // components are just ignored and treated as "empty // components" Component::Prefix(..) | Component::RootDir | Component::CurDir => continue, // If any part of the filename is '..', then skip over // unpacking the file to prevent directory traversal // security issues. See, e.g.: CVE-2001-1267, // CVE-2002-0399, CVE-2005-1918, CVE-2007-4131 Component::ParentDir => return Ok(false), Component::Normal(part) => file_dst.push(part), } } } // Skip cases where only slashes or '.' parts were seen, because // this is effectively an empty filename. if *dst == *file_dst { return Ok(true); } // Skip entries without a parent (i.e. outside of FS root) let parent = match file_dst.parent() { Some(p) => p, None => return Ok(false), }; if parent.symlink_metadata().is_err() { fs::create_dir_all(&parent).map_err(|e| { TarError::new(&format!("failed to create `{}`", parent.display()), e) })?; } let canon_target = self.validate_inside_dst(&dst, parent)?; self.unpack(Some(&canon_target), &file_dst) .map_err(|e| TarError::new(&format!("failed to unpack `{}`", file_dst.display()), e))?; Ok(true) } /// Unpack as destination directory `dst`. fn unpack_dir(&mut self, dst: &Path) -> io::Result<()> { // If the directory already exists just let it slide fs::create_dir(dst).or_else(|err| { if err.kind() == ErrorKind::AlreadyExists { let prev = fs::metadata(dst); if prev.map(|m| m.is_dir()).unwrap_or(false) { return Ok(()); } } Err(Error::new( err.kind(), format!("{} when creating dir {}", err, dst.display()), )) }) } /// Returns access to the header of this entry in the archive. fn unpack(&mut self, target_base: Option<&Path>, dst: &Path) -> io::Result { let kind = self.header.entry_type(); if kind.is_dir() { self.unpack_dir(dst)?; if let Ok(mode) = self.header.mode() { set_perms(dst, None, mode, self.preserve_permissions)?; } return Ok(Unpacked::__Nonexhaustive); } else if kind.is_hard_link() || kind.is_symlink() { let src = match self.link_name()? { Some(name) => name, None => { return Err(other(&format!( "hard link listed for {} but no link name found", String::from_utf8_lossy(self.header.as_bytes()) ))); } }; if src.iter().count() == 0 { return Err(other(&format!( "symlink destination for {} is empty", String::from_utf8_lossy(self.header.as_bytes()) ))); } if kind.is_hard_link() { let link_src = match target_base { // If we're unpacking within a directory then ensure that // the destination of this hard link is both present and // inside our own directory. This is needed because we want // to make sure to not overwrite anything outside the root. // // Note that this logic is only needed for hard links // currently. With symlinks the `validate_inside_dst` which // happens before this method as part of `unpack_in` will // use canonicalization to ensure this guarantee. For hard // links though they're canonicalized to their existing path // so we need to validate at this time. Some(ref p) => { let link_src = p.join(src); self.validate_inside_dst(p, &link_src)?; link_src } None => src.into_owned(), }; fs::hard_link(&link_src, dst).map_err(|err| { Error::new( err.kind(), format!( "{} when hard linking {} to {}", err, link_src.display(), dst.display() ), ) })?; } else { symlink(&src, dst).map_err(|err| { Error::new( err.kind(), format!( "{} when symlinking {} to {}", err, src.display(), dst.display() ), ) })?; }; return Ok(Unpacked::__Nonexhaustive); #[cfg(target_arch = "wasm32")] #[allow(unused_variables)] fn symlink(src: &Path, dst: &Path) -> io::Result<()> { Err(io::Error::new(io::ErrorKind::Other, "Not implemented")) } #[cfg(windows)] fn symlink(src: &Path, dst: &Path) -> io::Result<()> { ::std::os::windows::fs::symlink_file(src, dst) } #[cfg(any(unix, target_os = "redox"))] fn symlink(src: &Path, dst: &Path) -> io::Result<()> { ::std::os::unix::fs::symlink(src, dst) } } else if kind.is_pax_global_extensions() || kind.is_pax_local_extensions() || kind.is_gnu_longname() || kind.is_gnu_longlink() { return Ok(Unpacked::__Nonexhaustive); }; // Old BSD-tar compatibility. // Names that have a trailing slash should be treated as a directory. // Only applies to old headers. if self.header.as_ustar().is_none() && self.path_bytes().ends_with(b"/") { self.unpack_dir(dst)?; if let Ok(mode) = self.header.mode() { set_perms(dst, None, mode, self.preserve_permissions)?; } return Ok(Unpacked::__Nonexhaustive); } // Note the lack of `else` clause above. According to the FreeBSD // documentation: // // > A POSIX-compliant implementation must treat any unrecognized // > typeflag value as a regular file. // // As a result if we don't recognize the kind we just write out the file // as we would normally. // Ensure we write a new file rather than overwriting in-place which // is attackable; if an existing file is found unlink it. fn open(dst: &Path) -> io::Result { OpenOptions::new().write(true).create_new(true).open(dst) }; let mut f = (|| -> io::Result { let mut f = open(dst).or_else(|err| { if err.kind() != ErrorKind::AlreadyExists { Err(err) } else { match fs::remove_file(dst) { Ok(()) => open(dst), Err(ref e) if e.kind() == io::ErrorKind::NotFound => open(dst), Err(e) => Err(e), } } })?; for io in self.data.drain(..) { match io { EntryIo::Data(mut d) => { let expected = d.limit(); if io::copy(&mut d, &mut f)? != expected { return Err(other("failed to write entire file")); } } EntryIo::Pad(d) => { // TODO: checked cast to i64 let to = SeekFrom::Current(d.limit() as i64); let size = f.seek(to)?; f.set_len(size)?; } } } Ok(f) })() .map_err(|e| { let header = self.header.path_bytes(); TarError::new( &format!( "failed to unpack `{}` into `{}`", String::from_utf8_lossy(&header), dst.display() ), e, ) })?; if self.preserve_mtime { if let Ok(mtime) = self.header.mtime() { let mtime = FileTime::from_unix_time(mtime as i64, 0); filetime::set_file_handle_times(&f, Some(mtime), Some(mtime)).map_err(|e| { TarError::new(&format!("failed to set mtime for `{}`", dst.display()), e) })?; } } if let Ok(mode) = self.header.mode() { set_perms(dst, Some(&mut f), mode, self.preserve_permissions)?; } if self.unpack_xattrs { set_xattrs(self, dst)?; } return Ok(Unpacked::File(f)); fn set_perms( dst: &Path, f: Option<&mut std::fs::File>, mode: u32, preserve: bool, ) -> Result<(), TarError> { _set_perms(dst, f, mode, preserve).map_err(|e| { TarError::new( &format!( "failed to set permissions to {:o} \ for `{}`", mode, dst.display() ), e, ) }) } #[cfg(any(unix, target_os = "redox"))] fn _set_perms( dst: &Path, f: Option<&mut std::fs::File>, mode: u32, preserve: bool, ) -> io::Result<()> { use std::os::unix::prelude::*; let mode = if preserve { mode } else { mode & 0o777 }; let perm = fs::Permissions::from_mode(mode as _); match f { Some(f) => f.set_permissions(perm), None => fs::set_permissions(dst, perm), } } #[cfg(windows)] fn _set_perms( dst: &Path, f: Option<&mut std::fs::File>, mode: u32, _preserve: bool, ) -> io::Result<()> { if mode & 0o200 == 0o200 { return Ok(()); } match f { Some(f) => { let mut perm = f.metadata()?.permissions(); perm.set_readonly(true); f.set_permissions(perm) } None => { let mut perm = fs::metadata(dst)?.permissions(); perm.set_readonly(true); fs::set_permissions(dst, perm) } } } #[cfg(target_arch = "wasm32")] #[allow(unused_variables)] fn _set_perms( dst: &Path, f: Option<&mut std::fs::File>, mode: u32, _preserve: bool, ) -> io::Result<()> { Err(io::Error::new(io::ErrorKind::Other, "Not implemented")) } #[cfg(all(unix, feature = "xattr"))] fn set_xattrs(me: &mut EntryFields, dst: &Path) -> io::Result<()> { use std::ffi::OsStr; use std::os::unix::prelude::*; let exts = match me.pax_extensions() { Ok(Some(e)) => e, _ => return Ok(()), }; let exts = exts .filter_map(|e| e.ok()) .filter_map(|e| { let key = e.key_bytes(); let prefix = b"SCHILY.xattr."; if key.starts_with(prefix) { Some((&key[prefix.len()..], e)) } else { None } }) .map(|(key, e)| (OsStr::from_bytes(key), e.value_bytes())); for (key, value) in exts { xattr::set(dst, key, value).map_err(|e| { TarError::new( &format!( "failed to set extended \ attributes to {}. \ Xattrs: key={:?}, value={:?}.", dst.display(), key, String::from_utf8_lossy(value) ), e, ) })?; } Ok(()) } // Windows does not completely support posix xattrs // https://en.wikipedia.org/wiki/Extended_file_attributes#Windows_NT #[cfg(any( windows, target_os = "redox", not(feature = "xattr"), target_arch = "wasm32" ))] fn set_xattrs(_: &mut EntryFields, _: &Path) -> io::Result<()> { Ok(()) } } fn validate_inside_dst(&self, dst: &Path, file_dst: &Path) -> io::Result { // Abort if target (canonical) parent is outside of `dst` let canon_parent = file_dst.canonicalize().map_err(|err| { Error::new( err.kind(), format!("{} while canonicalizing {}", err, file_dst.display()), ) })?; let canon_target = dst.canonicalize().map_err(|err| { Error::new( err.kind(), format!("{} while canonicalizing {}", err, dst.display()), ) })?; if !canon_parent.starts_with(&canon_target) { let err = TarError::new( &format!( "trying to unpack outside of destination path: {}", canon_target.display() ), // TODO: use ErrorKind::InvalidInput here? (minor breaking change) Error::new(ErrorKind::Other, "Invalid argument"), ); return Err(err.into()); } Ok(canon_target) } } impl<'a> Read for EntryFields<'a> { fn read(&mut self, into: &mut [u8]) -> io::Result { loop { match self.data.get_mut(0).map(|io| io.read(into)) { Some(Ok(0)) => { self.data.remove(0); } Some(r) => return r, None => return Ok(0), } } } } impl<'a> Read for EntryIo<'a> { fn read(&mut self, into: &mut [u8]) -> io::Result { match *self { EntryIo::Pad(ref mut io) => io.read(into), EntryIo::Data(ref mut io) => io.read(into), } } } tar-0.4.26/src/entry_type.rs010066400017500001750000000134321332645215500141640ustar0000000000000000// See https://en.wikipedia.org/wiki/Tar_%28computing%29#UStar_format /// Indicate for the type of file described by a header. /// /// Each `Header` has an `entry_type` method returning an instance of this type /// which can be used to inspect what the header is describing. /// A non-exhaustive enum representing the possible entry types #[derive(Clone, Copy, PartialEq, Eq, Debug)] pub enum EntryType { /// Regular file Regular, /// Hard link Link, /// Symbolic link Symlink, /// Character device Char, /// Block device Block, /// Directory Directory, /// Named pipe (fifo) Fifo, /// Implementation-defined 'high-performance' type, treated as regular file Continuous, /// GNU extension - long file name GNULongName, /// GNU extension - long link name (link target) GNULongLink, /// GNU extension - sparse file GNUSparse, /// Global extended header XGlobalHeader, /// Extended Header XHeader, /// Hints that destructuring should not be exhaustive. /// /// This enum may grow additional variants, so this makes sure clients /// don't count on exhaustive matching. (Otherwise, adding a new variant /// could break existing code.) #[doc(hidden)] __Nonexhaustive(u8), } impl EntryType { /// Creates a new entry type from a raw byte. /// /// Note that the other named constructors of entry type may be more /// appropriate to create a file type from. pub fn new(byte: u8) -> EntryType { match byte { b'\x00' | b'0' => EntryType::Regular, b'1' => EntryType::Link, b'2' => EntryType::Symlink, b'3' => EntryType::Char, b'4' => EntryType::Block, b'5' => EntryType::Directory, b'6' => EntryType::Fifo, b'7' => EntryType::Continuous, b'x' => EntryType::XHeader, b'g' => EntryType::XGlobalHeader, b'L' => EntryType::GNULongName, b'K' => EntryType::GNULongLink, b'S' => EntryType::GNUSparse, b => EntryType::__Nonexhaustive(b), } } /// Returns the raw underlying byte that this entry type represents. pub fn as_byte(&self) -> u8 { match *self { EntryType::Regular => b'0', EntryType::Link => b'1', EntryType::Symlink => b'2', EntryType::Char => b'3', EntryType::Block => b'4', EntryType::Directory => b'5', EntryType::Fifo => b'6', EntryType::Continuous => b'7', EntryType::XHeader => b'x', EntryType::XGlobalHeader => b'g', EntryType::GNULongName => b'L', EntryType::GNULongLink => b'K', EntryType::GNUSparse => b'S', EntryType::__Nonexhaustive(b) => b, } } /// Creates a new entry type representing a regular file. pub fn file() -> EntryType { EntryType::Regular } /// Creates a new entry type representing a hard link. pub fn hard_link() -> EntryType { EntryType::Link } /// Creates a new entry type representing a symlink. pub fn symlink() -> EntryType { EntryType::Symlink } /// Creates a new entry type representing a character special device. pub fn character_special() -> EntryType { EntryType::Char } /// Creates a new entry type representing a block special device. pub fn block_special() -> EntryType { EntryType::Block } /// Creates a new entry type representing a directory. pub fn dir() -> EntryType { EntryType::Directory } /// Creates a new entry type representing a FIFO. pub fn fifo() -> EntryType { EntryType::Fifo } /// Creates a new entry type representing a contiguous file. pub fn contiguous() -> EntryType { EntryType::Continuous } /// Returns whether this type represents a regular file. pub fn is_file(&self) -> bool { self == &EntryType::Regular } /// Returns whether this type represents a hard link. pub fn is_hard_link(&self) -> bool { self == &EntryType::Link } /// Returns whether this type represents a symlink. pub fn is_symlink(&self) -> bool { self == &EntryType::Symlink } /// Returns whether this type represents a character special device. pub fn is_character_special(&self) -> bool { self == &EntryType::Char } /// Returns whether this type represents a block special device. pub fn is_block_special(&self) -> bool { self == &EntryType::Block } /// Returns whether this type represents a directory. pub fn is_dir(&self) -> bool { self == &EntryType::Directory } /// Returns whether this type represents a FIFO. pub fn is_fifo(&self) -> bool { self == &EntryType::Fifo } /// Returns whether this type represents a contiguous file. pub fn is_contiguous(&self) -> bool { self == &EntryType::Continuous } /// Returns whether this type represents a GNU long name header. pub fn is_gnu_longname(&self) -> bool { self == &EntryType::GNULongName } /// Returns whether this type represents a GNU sparse header. pub fn is_gnu_sparse(&self) -> bool { self == &EntryType::GNUSparse } /// Returns whether this type represents a GNU long link header. pub fn is_gnu_longlink(&self) -> bool { self == &EntryType::GNULongLink } /// Returns whether this type represents a GNU long name header. pub fn is_pax_global_extensions(&self) -> bool { self == &EntryType::XGlobalHeader } /// Returns whether this type represents a GNU long link header. pub fn is_pax_local_extensions(&self) -> bool { self == &EntryType::XHeader } } tar-0.4.26/src/error.rs010066400017500001750000000013261346161707700131200ustar0000000000000000use std::error; use std::fmt; use std::io::{self, Error}; #[derive(Debug)] pub struct TarError { desc: String, io: io::Error, } impl TarError { pub fn new(desc: &str, err: Error) -> TarError { TarError { desc: desc.to_string(), io: err, } } } impl error::Error for TarError { fn description(&self) -> &str { &self.desc } fn source(&self) -> Option<&(error::Error + 'static)> { Some(&self.io) } } impl fmt::Display for TarError { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { self.desc.fmt(f) } } impl From for Error { fn from(t: TarError) -> Error { Error::new(t.io.kind(), t) } } tar-0.4.26/src/header.rs010066400017500001750000001500411345764073700132220ustar0000000000000000#[cfg(any(unix, target_os = "redox"))] use std::os::unix::prelude::*; #[cfg(windows)] use std::os::windows::prelude::*; use std::borrow::Cow; use std::fmt; use std::fs; use std::io; use std::iter; use std::iter::repeat; use std::mem; use std::path::{Component, Path, PathBuf}; use std::str; use crate::other; use crate::EntryType; /// Representation of the header of an entry in an archive #[repr(C)] #[allow(missing_docs)] pub struct Header { bytes: [u8; 512], } /// Declares the information that should be included when filling a Header /// from filesystem metadata. #[derive(Clone, Copy, PartialEq, Eq, Debug)] pub enum HeaderMode { /// All supported metadata, including mod/access times and ownership will /// be included. Complete, /// Only metadata that is directly relevant to the identity of a file will /// be included. In particular, ownership and mod/access times are excluded. Deterministic, #[doc(hidden)] __Nonexhaustive, } /// Representation of the header of an entry in an archive #[repr(C)] #[allow(missing_docs)] pub struct OldHeader { pub name: [u8; 100], pub mode: [u8; 8], pub uid: [u8; 8], pub gid: [u8; 8], pub size: [u8; 12], pub mtime: [u8; 12], pub cksum: [u8; 8], pub linkflag: [u8; 1], pub linkname: [u8; 100], pub pad: [u8; 255], } /// Representation of the header of an entry in an archive #[repr(C)] #[allow(missing_docs)] pub struct UstarHeader { pub name: [u8; 100], pub mode: [u8; 8], pub uid: [u8; 8], pub gid: [u8; 8], pub size: [u8; 12], pub mtime: [u8; 12], pub cksum: [u8; 8], pub typeflag: [u8; 1], pub linkname: [u8; 100], // UStar format pub magic: [u8; 6], pub version: [u8; 2], pub uname: [u8; 32], pub gname: [u8; 32], pub dev_major: [u8; 8], pub dev_minor: [u8; 8], pub prefix: [u8; 155], pub pad: [u8; 12], } /// Representation of the header of an entry in an archive #[repr(C)] #[allow(missing_docs)] pub struct GnuHeader { pub name: [u8; 100], pub mode: [u8; 8], pub uid: [u8; 8], pub gid: [u8; 8], pub size: [u8; 12], pub mtime: [u8; 12], pub cksum: [u8; 8], pub typeflag: [u8; 1], pub linkname: [u8; 100], // GNU format pub magic: [u8; 6], pub version: [u8; 2], pub uname: [u8; 32], pub gname: [u8; 32], pub dev_major: [u8; 8], pub dev_minor: [u8; 8], pub atime: [u8; 12], pub ctime: [u8; 12], pub offset: [u8; 12], pub longnames: [u8; 4], pub unused: [u8; 1], pub sparse: [GnuSparseHeader; 4], pub isextended: [u8; 1], pub realsize: [u8; 12], pub pad: [u8; 17], } /// Description of the header of a spare entry. /// /// Specifies the offset/number of bytes of a chunk of data in octal. #[repr(C)] #[allow(missing_docs)] pub struct GnuSparseHeader { pub offset: [u8; 12], pub numbytes: [u8; 12], } /// Representation of the entry found to represent extended GNU sparse files. /// /// When a `GnuHeader` has the `isextended` flag set to `1` then the contents of /// the next entry will be one of these headers. #[repr(C)] #[allow(missing_docs)] pub struct GnuExtSparseHeader { pub sparse: [GnuSparseHeader; 21], pub isextended: [u8; 1], pub padding: [u8; 7], } impl Header { /// Creates a new blank GNU header. /// /// The GNU style header is the default for this library and allows various /// extensions such as long path names, long link names, and setting the /// atime/ctime metadata attributes of files. pub fn new_gnu() -> Header { let mut header = Header { bytes: [0; 512] }; unsafe { let gnu = cast_mut::<_, GnuHeader>(&mut header); gnu.magic = *b"ustar "; gnu.version = *b" \0"; } header.set_mtime(0); header } /// Creates a new blank UStar header. /// /// The UStar style header is an extension of the original archive header /// which enables some extra metadata along with storing a longer (but not /// too long) path name. /// /// UStar is also the basis used for pax archives. pub fn new_ustar() -> Header { let mut header = Header { bytes: [0; 512] }; unsafe { let gnu = cast_mut::<_, UstarHeader>(&mut header); gnu.magic = *b"ustar\0"; gnu.version = *b"00"; } header.set_mtime(0); header } /// Creates a new blank old header. /// /// This header format is the original archive header format which all other /// versions are compatible with (e.g. they are a superset). This header /// format limits the path name limit and isn't able to contain extra /// metadata like atime/ctime. pub fn new_old() -> Header { let mut header = Header { bytes: [0; 512] }; header.set_mtime(0); header } fn is_ustar(&self) -> bool { let ustar = unsafe { cast::<_, UstarHeader>(self) }; ustar.magic[..] == b"ustar\0"[..] && ustar.version[..] == b"00"[..] } fn is_gnu(&self) -> bool { let ustar = unsafe { cast::<_, UstarHeader>(self) }; ustar.magic[..] == b"ustar "[..] && ustar.version[..] == b" \0"[..] } /// View this archive header as a raw "old" archive header. /// /// This view will always succeed as all archive header formats will fill /// out at least the fields specified in the old header format. pub fn as_old(&self) -> &OldHeader { unsafe { cast(self) } } /// Same as `as_old`, but the mutable version. pub fn as_old_mut(&mut self) -> &mut OldHeader { unsafe { cast_mut(self) } } /// View this archive header as a raw UStar archive header. /// /// The UStar format is an extension to the tar archive format which enables /// longer pathnames and a few extra attributes such as the group and user /// name. /// /// This cast may not succeed as this function will test whether the /// magic/version fields of the UStar format have the appropriate values, /// returning `None` if they aren't correct. pub fn as_ustar(&self) -> Option<&UstarHeader> { if self.is_ustar() { Some(unsafe { cast(self) }) } else { None } } /// Same as `as_ustar_mut`, but the mutable version. pub fn as_ustar_mut(&mut self) -> Option<&mut UstarHeader> { if self.is_ustar() { Some(unsafe { cast_mut(self) }) } else { None } } /// View this archive header as a raw GNU archive header. /// /// The GNU format is an extension to the tar archive format which enables /// longer pathnames and a few extra attributes such as the group and user /// name. /// /// This cast may not succeed as this function will test whether the /// magic/version fields of the GNU format have the appropriate values, /// returning `None` if they aren't correct. pub fn as_gnu(&self) -> Option<&GnuHeader> { if self.is_gnu() { Some(unsafe { cast(self) }) } else { None } } /// Same as `as_gnu`, but the mutable version. pub fn as_gnu_mut(&mut self) -> Option<&mut GnuHeader> { if self.is_gnu() { Some(unsafe { cast_mut(self) }) } else { None } } /// Treats the given byte slice as a header. /// /// Panics if the length of the passed slice is not equal to 512. pub fn from_byte_slice(bytes: &[u8]) -> &Header { assert_eq!(bytes.len(), mem::size_of::
()); assert_eq!(mem::align_of_val(bytes), mem::align_of::
()); unsafe { &*(bytes.as_ptr() as *const Header) } } /// Returns a view into this header as a byte array. pub fn as_bytes(&self) -> &[u8; 512] { &self.bytes } /// Returns a view into this header as a byte array. pub fn as_mut_bytes(&mut self) -> &mut [u8; 512] { &mut self.bytes } /// Blanket sets the metadata in this header from the metadata argument /// provided. /// /// This is useful for initializing a `Header` from the OS's metadata from a /// file. By default, this will use `HeaderMode::Complete` to include all /// metadata. pub fn set_metadata(&mut self, meta: &fs::Metadata) { self.fill_from(meta, HeaderMode::Complete); } /// Sets only the metadata relevant to the given HeaderMode in this header /// from the metadata argument provided. pub fn set_metadata_in_mode(&mut self, meta: &fs::Metadata, mode: HeaderMode) { self.fill_from(meta, mode); } /// Returns the size of entry's data this header represents. /// /// This is different from `Header::size` for sparse files, which have /// some longer `size()` but shorter `entry_size()`. The `entry_size()` /// listed here should be the number of bytes in the archive this header /// describes. /// /// May return an error if the field is corrupted. pub fn entry_size(&self) -> io::Result { num_field_wrapper_from(&self.as_old().size).map_err(|err| { io::Error::new( err.kind(), format!("{} when getting size for {}", err, self.path_lossy()), ) }) } /// Returns the file size this header represents. /// /// May return an error if the field is corrupted. pub fn size(&self) -> io::Result { if self.entry_type().is_gnu_sparse() { self.as_gnu() .ok_or_else(|| other("sparse header was not a gnu header")) .and_then(|h| h.real_size()) } else { self.entry_size() } } /// Encodes the `size` argument into the size field of this header. pub fn set_size(&mut self, size: u64) { num_field_wrapper_into(&mut self.as_old_mut().size, size); } /// Returns the raw path name stored in this header. /// /// 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. pub fn path(&self) -> io::Result> { bytes2path(self.path_bytes()) } /// Returns the pathname stored in this header as a byte array. /// /// This function is guaranteed to succeed, but you may wish to call the /// `path` method to convert to a `Path`. /// /// Note that this function will convert any `\` characters to directory /// separators. pub fn path_bytes(&self) -> Cow<[u8]> { if let Some(ustar) = self.as_ustar() { ustar.path_bytes() } else { let name = truncate(&self.as_old().name); Cow::Borrowed(name) } } /// Gets the path in a "lossy" way, used for error reporting ONLY. fn path_lossy(&self) -> String { String::from_utf8_lossy(&self.path_bytes()).to_string() } /// Sets the path name for this header. /// /// This function will set the pathname listed in this header, encoding it /// in the appropriate format. May fail if the path is too long or if the /// path specified is not unicode and this is a Windows platform. pub fn set_path>(&mut self, p: P) -> io::Result<()> { self._set_path(p.as_ref()) } fn _set_path(&mut self, path: &Path) -> io::Result<()> { if let Some(ustar) = self.as_ustar_mut() { return ustar.set_path(path); } copy_path_into(&mut self.as_old_mut().name, path, false).map_err(|err| { io::Error::new( err.kind(), format!("{} when setting path for {}", err, self.path_lossy()), ) }) } /// Returns the link name stored in this header, 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. pub fn link_name(&self) -> io::Result>> { match self.link_name_bytes() { Some(bytes) => bytes2path(bytes).map(Some), None => Ok(None), } } /// Returns the link name stored in this header as a byte array, if any. /// /// This function is guaranteed to succeed, but you may wish to call the /// `link_name` method to convert to a `Path`. /// /// Note that this function will convert any `\` characters to directory /// separators. pub fn link_name_bytes(&self) -> Option> { let old = self.as_old(); if old.linkname[0] != 0 { Some(Cow::Borrowed(truncate(&old.linkname))) } else { None } } /// Sets the link name for this header. /// /// This function will set the linkname listed in this header, encoding it /// in the appropriate format. May fail if the link name is too long or if /// the path specified is not unicode and this is a Windows platform. pub fn set_link_name>(&mut self, p: P) -> io::Result<()> { self._set_link_name(p.as_ref()) } fn _set_link_name(&mut self, path: &Path) -> io::Result<()> { copy_path_into(&mut self.as_old_mut().linkname, path, true).map_err(|err| { io::Error::new( err.kind(), format!("{} when setting link name for {}", err, self.path_lossy()), ) }) } /// Returns the mode bits for this file /// /// May return an error if the field is corrupted. pub fn mode(&self) -> io::Result { octal_from(&self.as_old().mode) .map(|u| u as u32) .map_err(|err| { io::Error::new( err.kind(), format!("{} when getting mode for {}", err, self.path_lossy()), ) }) } /// Encodes the `mode` provided into this header. pub fn set_mode(&mut self, mode: u32) { octal_into(&mut self.as_old_mut().mode, mode); } /// Returns the value of the owner's user ID field /// /// May return an error if the field is corrupted. pub fn uid(&self) -> io::Result { num_field_wrapper_from(&self.as_old().uid) .map(|u| u as u64) .map_err(|err| { io::Error::new( err.kind(), format!("{} when getting uid for {}", err, self.path_lossy()), ) }) } /// Encodes the `uid` provided into this header. pub fn set_uid(&mut self, uid: u64) { num_field_wrapper_into(&mut self.as_old_mut().uid, uid); } /// Returns the value of the group's user ID field pub fn gid(&self) -> io::Result { num_field_wrapper_from(&self.as_old().gid) .map(|u| u as u64) .map_err(|err| { io::Error::new( err.kind(), format!("{} when getting gid for {}", err, self.path_lossy()), ) }) } /// Encodes the `gid` provided into this header. pub fn set_gid(&mut self, gid: u64) { num_field_wrapper_into(&mut self.as_old_mut().gid, gid); } /// Returns the last modification time in Unix time format pub fn mtime(&self) -> io::Result { num_field_wrapper_from(&self.as_old().mtime).map_err(|err| { io::Error::new( err.kind(), format!("{} when getting mtime for {}", err, self.path_lossy()), ) }) } /// Encodes the `mtime` provided into this header. /// /// Note that this time is typically a number of seconds passed since /// January 1, 1970. pub fn set_mtime(&mut self, mtime: u64) { num_field_wrapper_into(&mut self.as_old_mut().mtime, mtime); } /// Return the user name of the owner of this file. /// /// A return value of `Ok(Some(..))` indicates that the user name was /// present and was valid utf-8, `Ok(None)` indicates that the user name is /// not present in this archive format, and `Err` indicates that the user /// name was present but was not valid utf-8. pub fn username(&self) -> Result, str::Utf8Error> { match self.username_bytes() { Some(bytes) => str::from_utf8(bytes).map(Some), None => Ok(None), } } /// Returns the user name of the owner of this file, if present. /// /// A return value of `None` indicates that the user name is not present in /// this header format. pub fn username_bytes(&self) -> Option<&[u8]> { if let Some(ustar) = self.as_ustar() { Some(ustar.username_bytes()) } else if let Some(gnu) = self.as_gnu() { Some(gnu.username_bytes()) } else { None } } /// Sets the username inside this header. /// /// This function will return an error if this header format cannot encode a /// user name or the name is too long. pub fn set_username(&mut self, name: &str) -> io::Result<()> { if let Some(ustar) = self.as_ustar_mut() { return ustar.set_username(name); } if let Some(gnu) = self.as_gnu_mut() { gnu.set_username(name) } else { Err(other("not a ustar or gnu archive, cannot set username")) } } /// Return the group name of the owner of this file. /// /// A return value of `Ok(Some(..))` indicates that the group name was /// present and was valid utf-8, `Ok(None)` indicates that the group name is /// not present in this archive format, and `Err` indicates that the group /// name was present but was not valid utf-8. pub fn groupname(&self) -> Result, str::Utf8Error> { match self.groupname_bytes() { Some(bytes) => str::from_utf8(bytes).map(Some), None => Ok(None), } } /// Returns the group name of the owner of this file, if present. /// /// A return value of `None` indicates that the group name is not present in /// this header format. pub fn groupname_bytes(&self) -> Option<&[u8]> { if let Some(ustar) = self.as_ustar() { Some(ustar.groupname_bytes()) } else if let Some(gnu) = self.as_gnu() { Some(gnu.groupname_bytes()) } else { None } } /// Sets the group name inside this header. /// /// This function will return an error if this header format cannot encode a /// group name or the name is too long. pub fn set_groupname(&mut self, name: &str) -> io::Result<()> { if let Some(ustar) = self.as_ustar_mut() { return ustar.set_groupname(name); } if let Some(gnu) = self.as_gnu_mut() { gnu.set_groupname(name) } else { Err(other("not a ustar or gnu archive, cannot set groupname")) } } /// Returns the device major number, if present. /// /// This field may not be present in all archives, and it may not be /// correctly formed in all archives. `Ok(Some(..))` means it was present /// and correctly decoded, `Ok(None)` indicates that this header format does /// not include the device major number, and `Err` indicates that it was /// present and failed to decode. pub fn device_major(&self) -> io::Result> { if let Some(ustar) = self.as_ustar() { ustar.device_major().map(Some) } else if let Some(gnu) = self.as_gnu() { gnu.device_major().map(Some) } else { Ok(None) } } /// Encodes the value `major` into the dev_major field of this header. /// /// This function will return an error if this header format cannot encode a /// major device number. pub fn set_device_major(&mut self, major: u32) -> io::Result<()> { if let Some(ustar) = self.as_ustar_mut() { return Ok(ustar.set_device_major(major)); } if let Some(gnu) = self.as_gnu_mut() { Ok(gnu.set_device_major(major)) } else { Err(other("not a ustar or gnu archive, cannot set dev_major")) } } /// Returns the device minor number, if present. /// /// This field may not be present in all archives, and it may not be /// correctly formed in all archives. `Ok(Some(..))` means it was present /// and correctly decoded, `Ok(None)` indicates that this header format does /// not include the device minor number, and `Err` indicates that it was /// present and failed to decode. pub fn device_minor(&self) -> io::Result> { if let Some(ustar) = self.as_ustar() { ustar.device_minor().map(Some) } else if let Some(gnu) = self.as_gnu() { gnu.device_minor().map(Some) } else { Ok(None) } } /// Encodes the value `minor` into the dev_minor field of this header. /// /// This function will return an error if this header format cannot encode a /// minor device number. pub fn set_device_minor(&mut self, minor: u32) -> io::Result<()> { if let Some(ustar) = self.as_ustar_mut() { return Ok(ustar.set_device_minor(minor)); } if let Some(gnu) = self.as_gnu_mut() { Ok(gnu.set_device_minor(minor)) } else { Err(other("not a ustar or gnu archive, cannot set dev_minor")) } } /// Returns the type of file described by this header. pub fn entry_type(&self) -> EntryType { EntryType::new(self.as_old().linkflag[0]) } /// Sets the type of file that will be described by this header. pub fn set_entry_type(&mut self, ty: EntryType) { self.as_old_mut().linkflag = [ty.as_byte()]; } /// Returns the checksum field of this header. /// /// May return an error if the field is corrupted. pub fn cksum(&self) -> io::Result { octal_from(&self.as_old().cksum) .map(|u| u as u32) .map_err(|err| { io::Error::new( err.kind(), format!("{} when getting cksum for {}", err, self.path_lossy()), ) }) } /// Sets the checksum field of this header based on the current fields in /// this header. pub fn set_cksum(&mut self) { let cksum = self.calculate_cksum(); octal_into(&mut self.as_old_mut().cksum, cksum); } fn calculate_cksum(&self) -> u32 { let old = self.as_old(); let start = old as *const _ as usize; let cksum_start = old.cksum.as_ptr() as *const _ as usize; let offset = cksum_start - start; let len = old.cksum.len(); self.bytes[0..offset] .iter() .chain(iter::repeat(&b' ').take(len)) .chain(&self.bytes[offset + len..]) .fold(0, |a, b| a + (*b as u32)) } fn fill_from(&mut self, meta: &fs::Metadata, mode: HeaderMode) { self.fill_platform_from(meta, mode); // Set size of directories to zero self.set_size(if meta.is_dir() || meta.file_type().is_symlink() { 0 } else { meta.len() }); if let Some(ustar) = self.as_ustar_mut() { ustar.set_device_major(0); ustar.set_device_minor(0); } if let Some(gnu) = self.as_gnu_mut() { gnu.set_device_major(0); gnu.set_device_minor(0); } } #[cfg(target_arch = "wasm32")] #[allow(unused_variables)] fn fill_platform_from(&mut self, meta: &fs::Metadata, mode: HeaderMode) { unimplemented!(); } #[cfg(any(unix, target_os = "redox"))] fn fill_platform_from(&mut self, meta: &fs::Metadata, mode: HeaderMode) { match mode { HeaderMode::Complete => { self.set_mtime(meta.mtime() as u64); self.set_uid(meta.uid() as u64); self.set_gid(meta.gid() as u64); self.set_mode(meta.mode() as u32); } HeaderMode::Deterministic => { self.set_mtime(0); self.set_uid(0); self.set_gid(0); // Use a default umask value, but propagate the (user) execute bit. let fs_mode = if meta.is_dir() || (0o100 & meta.mode() == 0o100) { 0o755 } else { 0o644 }; self.set_mode(fs_mode); } HeaderMode::__Nonexhaustive => panic!(), } // Note that if we are a GNU header we *could* set atime/ctime, except // the `tar` utility doesn't do that by default and it causes problems // with 7-zip [1]. // // It's always possible to fill them out manually, so we just don't fill // it out automatically here. // // [1]: https://github.com/alexcrichton/tar-rs/issues/70 // TODO: need to bind more file types self.set_entry_type(entry_type(meta.mode())); #[cfg(not(target_os = "redox"))] fn entry_type(mode: u32) -> EntryType { match mode as libc::mode_t & libc::S_IFMT { libc::S_IFREG => EntryType::file(), libc::S_IFLNK => EntryType::symlink(), libc::S_IFCHR => EntryType::character_special(), libc::S_IFBLK => EntryType::block_special(), libc::S_IFDIR => EntryType::dir(), libc::S_IFIFO => EntryType::fifo(), _ => EntryType::new(b' '), } } #[cfg(target_os = "redox")] fn entry_type(mode: u32) -> EntryType { use syscall; match mode as u16 & syscall::MODE_TYPE { syscall::MODE_FILE => EntryType::file(), syscall::MODE_SYMLINK => EntryType::symlink(), syscall::MODE_DIR => EntryType::dir(), _ => EntryType::new(b' '), } } } #[cfg(windows)] fn fill_platform_from(&mut self, meta: &fs::Metadata, mode: HeaderMode) { // There's no concept of a file mode on windows, so do a best approximation here. match mode { HeaderMode::Complete => { self.set_uid(0); self.set_gid(0); // The dates listed in tarballs are always seconds relative to // January 1, 1970. On Windows, however, the timestamps are returned as // dates relative to January 1, 1601 (in 100ns intervals), so we need to // add in some offset for those dates. let mtime = (meta.last_write_time() / (1_000_000_000 / 100)) - 11644473600; self.set_mtime(mtime); let fs_mode = { const FILE_ATTRIBUTE_READONLY: u32 = 0x00000001; let readonly = meta.file_attributes() & FILE_ATTRIBUTE_READONLY; match (meta.is_dir(), readonly != 0) { (true, false) => 0o755, (true, true) => 0o555, (false, false) => 0o644, (false, true) => 0o444, } }; self.set_mode(fs_mode); } HeaderMode::Deterministic => { self.set_uid(0); self.set_gid(0); self.set_mtime(0); let fs_mode = if meta.is_dir() { 0o755 } else { 0o644 }; self.set_mode(fs_mode); } HeaderMode::__Nonexhaustive => panic!(), } let ft = meta.file_type(); self.set_entry_type(if ft.is_dir() { EntryType::dir() } else if ft.is_file() { EntryType::file() } else if ft.is_symlink() { EntryType::symlink() } else { EntryType::new(b' ') }); } fn debug_fields(&self, b: &mut fmt::DebugStruct) { if let Ok(entry_size) = self.entry_size() { b.field("entry_size", &entry_size); } if let Ok(size) = self.size() { b.field("size", &size); } if let Ok(path) = self.path() { b.field("path", &path); } if let Ok(link_name) = self.link_name() { b.field("link_name", &link_name); } if let Ok(mode) = self.mode() { b.field("mode", &DebugAsOctal(mode)); } if let Ok(uid) = self.uid() { b.field("uid", &uid); } if let Ok(gid) = self.gid() { b.field("gid", &gid); } if let Ok(mtime) = self.mtime() { b.field("mtime", &mtime); } if let Ok(username) = self.username() { b.field("username", &username); } if let Ok(groupname) = self.groupname() { b.field("groupname", &groupname); } if let Ok(device_major) = self.device_major() { b.field("device_major", &device_major); } if let Ok(device_minor) = self.device_minor() { b.field("device_minor", &device_minor); } if let Ok(cksum) = self.cksum() { b.field("cksum", &cksum); b.field("cksum_valid", &(cksum == self.calculate_cksum())); } } } struct DebugAsOctal(T); impl fmt::Debug for DebugAsOctal { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { fmt::Octal::fmt(&self.0, f) } } unsafe fn cast(a: &T) -> &U { assert_eq!(mem::size_of_val(a), mem::size_of::()); assert_eq!(mem::align_of_val(a), mem::align_of::()); &*(a as *const T as *const U) } unsafe fn cast_mut(a: &mut T) -> &mut U { assert_eq!(mem::size_of_val(a), mem::size_of::()); assert_eq!(mem::align_of_val(a), mem::align_of::()); &mut *(a as *mut T as *mut U) } impl Clone for Header { fn clone(&self) -> Header { Header { bytes: self.bytes } } } impl fmt::Debug for Header { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { if let Some(me) = self.as_ustar() { me.fmt(f) } else if let Some(me) = self.as_gnu() { me.fmt(f) } else { self.as_old().fmt(f) } } } impl OldHeader { /// Views this as a normal `Header` pub fn as_header(&self) -> &Header { unsafe { cast(self) } } /// Views this as a normal `Header` pub fn as_header_mut(&mut self) -> &mut Header { unsafe { cast_mut(self) } } } impl fmt::Debug for OldHeader { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { let mut f = f.debug_struct("OldHeader"); self.as_header().debug_fields(&mut f); f.finish() } } impl UstarHeader { /// See `Header::path_bytes` pub fn path_bytes(&self) -> Cow<[u8]> { if self.prefix[0] == 0 && !self.name.contains(&b'\\') { Cow::Borrowed(truncate(&self.name)) } else { let mut bytes = Vec::new(); let prefix = truncate(&self.prefix); if prefix.len() > 0 { bytes.extend_from_slice(prefix); bytes.push(b'/'); } bytes.extend_from_slice(truncate(&self.name)); Cow::Owned(bytes) } } /// Gets the path in a "lossy" way, used for error reporting ONLY. fn path_lossy(&self) -> String { String::from_utf8_lossy(&self.path_bytes()).to_string() } /// See `Header::set_path` pub fn set_path>(&mut self, p: P) -> io::Result<()> { self._set_path(p.as_ref()) } fn _set_path(&mut self, path: &Path) -> io::Result<()> { // This can probably be optimized quite a bit more, but for now just do // something that's relatively easy and readable. // // First up, if the path fits within `self.name` then we just shove it // in there. If not then we try to split it between some existing path // components where it can fit in name/prefix. To do that we peel off // enough until the path fits in `prefix`, then we try to put both // halves into their destination. let bytes = path2bytes(path)?; let (maxnamelen, maxprefixlen) = (self.name.len(), self.prefix.len()); if bytes.len() <= maxnamelen { copy_path_into(&mut self.name, path, false).map_err(|err| { io::Error::new( err.kind(), format!("{} when setting path for {}", err, self.path_lossy()), ) })?; } else { let mut prefix = path; let mut prefixlen; loop { match prefix.parent() { Some(parent) => prefix = parent, None => { return Err(other(&format!( "path cannot be split to be inserted into archive: {}", path.display() ))); } } prefixlen = path2bytes(prefix)?.len(); if prefixlen <= maxprefixlen { break; } } copy_path_into(&mut self.prefix, prefix, false).map_err(|err| { io::Error::new( err.kind(), format!("{} when setting path for {}", err, self.path_lossy()), ) })?; let path = bytes2path(Cow::Borrowed(&bytes[prefixlen + 1..]))?; copy_path_into(&mut self.name, &path, false).map_err(|err| { io::Error::new( err.kind(), format!("{} when setting path for {}", err, self.path_lossy()), ) })?; } Ok(()) } /// See `Header::username_bytes` pub fn username_bytes(&self) -> &[u8] { truncate(&self.uname) } /// See `Header::set_username` pub fn set_username(&mut self, name: &str) -> io::Result<()> { copy_into(&mut self.uname, name.as_bytes()).map_err(|err| { io::Error::new( err.kind(), format!("{} when setting username for {}", err, self.path_lossy()), ) }) } /// See `Header::groupname_bytes` pub fn groupname_bytes(&self) -> &[u8] { truncate(&self.gname) } /// See `Header::set_groupname` pub fn set_groupname(&mut self, name: &str) -> io::Result<()> { copy_into(&mut self.gname, name.as_bytes()).map_err(|err| { io::Error::new( err.kind(), format!("{} when setting groupname for {}", err, self.path_lossy()), ) }) } /// See `Header::device_major` pub fn device_major(&self) -> io::Result { octal_from(&self.dev_major) .map(|u| u as u32) .map_err(|err| { io::Error::new( err.kind(), format!( "{} when getting device_major for {}", err, self.path_lossy() ), ) }) } /// See `Header::set_device_major` pub fn set_device_major(&mut self, major: u32) { octal_into(&mut self.dev_major, major); } /// See `Header::device_minor` pub fn device_minor(&self) -> io::Result { octal_from(&self.dev_minor) .map(|u| u as u32) .map_err(|err| { io::Error::new( err.kind(), format!( "{} when getting device_minor for {}", err, self.path_lossy() ), ) }) } /// See `Header::set_device_minor` pub fn set_device_minor(&mut self, minor: u32) { octal_into(&mut self.dev_minor, minor); } /// Views this as a normal `Header` pub fn as_header(&self) -> &Header { unsafe { cast(self) } } /// Views this as a normal `Header` pub fn as_header_mut(&mut self) -> &mut Header { unsafe { cast_mut(self) } } } impl fmt::Debug for UstarHeader { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { let mut f = f.debug_struct("UstarHeader"); self.as_header().debug_fields(&mut f); f.finish() } } impl GnuHeader { /// See `Header::username_bytes` pub fn username_bytes(&self) -> &[u8] { truncate(&self.uname) } /// Gets the fullname (group:user) in a "lossy" way, used for error reporting ONLY. fn fullname_lossy(&self) -> String { format!( "{}:{}", String::from_utf8_lossy(&self.groupname_bytes()), String::from_utf8_lossy(&self.username_bytes()), ) } /// See `Header::set_username` pub fn set_username(&mut self, name: &str) -> io::Result<()> { copy_into(&mut self.uname, name.as_bytes()).map_err(|err| { io::Error::new( err.kind(), format!( "{} when setting username for {}", err, self.fullname_lossy() ), ) }) } /// See `Header::groupname_bytes` pub fn groupname_bytes(&self) -> &[u8] { truncate(&self.gname) } /// See `Header::set_groupname` pub fn set_groupname(&mut self, name: &str) -> io::Result<()> { copy_into(&mut self.gname, name.as_bytes()).map_err(|err| { io::Error::new( err.kind(), format!( "{} when setting groupname for {}", err, self.fullname_lossy() ), ) }) } /// See `Header::device_major` pub fn device_major(&self) -> io::Result { octal_from(&self.dev_major) .map(|u| u as u32) .map_err(|err| { io::Error::new( err.kind(), format!( "{} when getting device_major for {}", err, self.fullname_lossy() ), ) }) } /// See `Header::set_device_major` pub fn set_device_major(&mut self, major: u32) { octal_into(&mut self.dev_major, major); } /// See `Header::device_minor` pub fn device_minor(&self) -> io::Result { octal_from(&self.dev_minor) .map(|u| u as u32) .map_err(|err| { io::Error::new( err.kind(), format!( "{} when getting device_minor for {}", err, self.fullname_lossy() ), ) }) } /// See `Header::set_device_minor` pub fn set_device_minor(&mut self, minor: u32) { octal_into(&mut self.dev_minor, minor); } /// Returns the last modification time in Unix time format pub fn atime(&self) -> io::Result { num_field_wrapper_from(&self.atime).map_err(|err| { io::Error::new( err.kind(), format!("{} when getting atime for {}", err, self.fullname_lossy()), ) }) } /// Encodes the `atime` provided into this header. /// /// Note that this time is typically a number of seconds passed since /// January 1, 1970. pub fn set_atime(&mut self, atime: u64) { num_field_wrapper_into(&mut self.atime, atime); } /// Returns the last modification time in Unix time format pub fn ctime(&self) -> io::Result { num_field_wrapper_from(&self.ctime).map_err(|err| { io::Error::new( err.kind(), format!("{} when getting ctime for {}", err, self.fullname_lossy()), ) }) } /// Encodes the `ctime` provided into this header. /// /// Note that this time is typically a number of seconds passed since /// January 1, 1970. pub fn set_ctime(&mut self, ctime: u64) { num_field_wrapper_into(&mut self.ctime, ctime); } /// Returns the "real size" of the file this header represents. /// /// This is applicable for sparse files where the returned size here is the /// size of the entire file after the sparse regions have been filled in. pub fn real_size(&self) -> io::Result { octal_from(&self.realsize).map_err(|err| { io::Error::new( err.kind(), format!( "{} when getting real_size for {}", err, self.fullname_lossy() ), ) }) } /// Indicates whether this header will be followed by additional /// sparse-header records. /// /// Note that this is handled internally by this library, and is likely only /// interesting if a `raw` iterator is being used. pub fn is_extended(&self) -> bool { self.isextended[0] == 1 } /// Views this as a normal `Header` pub fn as_header(&self) -> &Header { unsafe { cast(self) } } /// Views this as a normal `Header` pub fn as_header_mut(&mut self) -> &mut Header { unsafe { cast_mut(self) } } } impl fmt::Debug for GnuHeader { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { let mut f = f.debug_struct("GnuHeader"); self.as_header().debug_fields(&mut f); if let Ok(atime) = self.atime() { f.field("atime", &atime); } if let Ok(ctime) = self.ctime() { f.field("ctime", &ctime); } f.field("is_extended", &self.is_extended()) .field("sparse", &DebugSparseHeaders(&self.sparse)) .finish() } } struct DebugSparseHeaders<'a>(&'a [GnuSparseHeader]); impl<'a> fmt::Debug for DebugSparseHeaders<'a> { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { let mut f = f.debug_list(); for header in self.0 { if !header.is_empty() { f.entry(header); } } f.finish() } } impl GnuSparseHeader { /// Returns true if block is empty pub fn is_empty(&self) -> bool { self.offset[0] == 0 || self.numbytes[0] == 0 } /// Offset of the block from the start of the file /// /// Returns `Err` for a malformed `offset` field. pub fn offset(&self) -> io::Result { octal_from(&self.offset).map_err(|err| { io::Error::new( err.kind(), format!("{} when getting offset from sparce header", err), ) }) } /// Length of the block /// /// Returns `Err` for a malformed `numbytes` field. pub fn length(&self) -> io::Result { octal_from(&self.numbytes).map_err(|err| { io::Error::new( err.kind(), format!("{} when getting length from sparse header", err), ) }) } } impl fmt::Debug for GnuSparseHeader { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { let mut f = f.debug_struct("GnuSparseHeader"); if let Ok(offset) = self.offset() { f.field("offset", &offset); } if let Ok(length) = self.length() { f.field("length", &length); } f.finish() } } impl GnuExtSparseHeader { /// Crates a new zero'd out sparse header entry. pub fn new() -> GnuExtSparseHeader { unsafe { mem::zeroed() } } /// Returns a view into this header as a byte array. pub fn as_bytes(&self) -> &[u8; 512] { debug_assert_eq!(mem::size_of_val(self), 512); unsafe { mem::transmute(self) } } /// Returns a view into this header as a byte array. pub fn as_mut_bytes(&mut self) -> &mut [u8; 512] { debug_assert_eq!(mem::size_of_val(self), 512); unsafe { mem::transmute(self) } } /// Returns a slice of the underlying sparse headers. /// /// Some headers may represent empty chunks of both the offset and numbytes /// fields are 0. pub fn sparse(&self) -> &[GnuSparseHeader; 21] { &self.sparse } /// Indicates if another sparse header should be following this one. pub fn is_extended(&self) -> bool { self.isextended[0] == 1 } } impl Default for GnuExtSparseHeader { fn default() -> Self { Self::new() } } fn octal_from(slice: &[u8]) -> io::Result { let trun = truncate(slice); let num = match str::from_utf8(trun) { Ok(n) => n, Err(_) => { return Err(other(&format!( "numeric field did not have utf-8 text: {}", String::from_utf8_lossy(trun) ))); } }; match u64::from_str_radix(num.trim(), 8) { Ok(n) => Ok(n), Err(_) => Err(other(&format!("numeric field was not a number: {}", num))), } } fn octal_into(dst: &mut [u8], val: T) { let o = format!("{:o}", val); let value = o.bytes().rev().chain(repeat(b'0')); for (slot, value) in dst.iter_mut().rev().skip(1).zip(value) { *slot = value; } } // Wrapper to figure out if we should fill the header field using tar's numeric // extension (binary) or not (octal). fn num_field_wrapper_into(dst: &mut [u8], src: u64) { if src >= 8589934592 || (src >= 2097152 && dst.len() == 8) { numeric_extended_into(dst, src); } else { octal_into(dst, src); } } // Wrapper to figure out if we should read the header field in binary (numeric // extension) or octal (standard encoding). fn num_field_wrapper_from(src: &[u8]) -> io::Result { if src[0] & 0x80 != 0 { Ok(numeric_extended_from(src)) } else { octal_from(src) } } // When writing numeric fields with is the extended form, the high bit of the // first byte is set to 1 and the remainder of the field is treated as binary // instead of octal ascii. // This handles writing u64 to 8 (uid, gid) or 12 (size, *time) bytes array. fn numeric_extended_into(dst: &mut [u8], src: u64) { let len: usize = dst.len(); for (slot, val) in dst.iter_mut().zip( repeat(0) .take(len - 8) // to zero init extra bytes .chain((0..8).rev().map(|x| ((src >> (8 * x)) & 0xff) as u8)), ) { *slot = val; } dst[0] |= 0x80; } fn numeric_extended_from(src: &[u8]) -> u64 { let mut dst: u64 = 0; let mut b_to_skip = 1; if src.len() == 8 { // read first byte without extension flag bit dst = (src[0] ^ 0x80) as u64; } else { // only read last 8 bytes b_to_skip = src.len() - 8; } for byte in src.iter().skip(b_to_skip) { dst <<= 8; dst |= *byte as u64; } dst } fn truncate(slice: &[u8]) -> &[u8] { match slice.iter().position(|i| *i == 0) { Some(i) => &slice[..i], None => slice, } } /// Copies `bytes` into the `slot` provided, returning an error if the `bytes` /// array is too long or if it contains any nul bytes. fn copy_into(slot: &mut [u8], bytes: &[u8]) -> io::Result<()> { if bytes.len() > slot.len() { Err(other("provided value is too long")) } else if bytes.iter().any(|b| *b == 0) { Err(other("provided value contains a nul byte")) } else { for (slot, val) in slot.iter_mut().zip(bytes.iter().chain(Some(&0))) { *slot = *val; } Ok(()) } } /// Copies `path` into the `slot` provided /// /// Returns an error if: /// /// * the path is too long to fit /// * a nul byte was found /// * an invalid path component is encountered (e.g. a root path or parent dir) /// * the path itself is empty fn copy_path_into(mut slot: &mut [u8], path: &Path, is_link_name: bool) -> io::Result<()> { let mut emitted = false; let mut needs_slash = false; for component in path.components() { let bytes = path2bytes(Path::new(component.as_os_str()))?; match (component, is_link_name) { (Component::Prefix(..), false) | (Component::RootDir, false) => { return Err(other("paths in archives must be relative")); } (Component::ParentDir, false) => { return Err(other("paths in archives must not have `..`")); } // Allow "./" as the path (Component::CurDir, false) if path.components().count() == 1 => {} (Component::CurDir, false) => continue, (Component::Normal(_), _) | (_, true) => {} }; if needs_slash { copy(&mut slot, b"/")?; } if bytes.contains(&b'/') { if let Component::Normal(..) = component { return Err(other("path component in archive cannot contain `/`")); } } copy(&mut slot, &*bytes)?; if &*bytes != b"/" { needs_slash = true; } emitted = true; } if !emitted { return Err(other("paths in archives must have at least one component")); } if ends_with_slash(path) { copy(&mut slot, &[b'/'])?; } return Ok(()); fn copy(slot: &mut &mut [u8], bytes: &[u8]) -> io::Result<()> { copy_into(*slot, bytes)?; let tmp = mem::replace(slot, &mut []); *slot = &mut tmp[bytes.len()..]; Ok(()) } } #[cfg(target_arch = "wasm32")] fn ends_with_slash(p: &Path) -> bool { p.to_string_lossy().ends_with('/') } #[cfg(windows)] fn ends_with_slash(p: &Path) -> bool { let last = p.as_os_str().encode_wide().last(); last == Some(b'/' as u16) || last == Some(b'\\' as u16) } #[cfg(any(unix, target_os = "redox"))] fn ends_with_slash(p: &Path) -> bool { p.as_os_str().as_bytes().ends_with(&[b'/']) } #[cfg(any(windows, target_arch = "wasm32"))] pub fn path2bytes(p: &Path) -> io::Result> { p.as_os_str() .to_str() .map(|s| s.as_bytes()) .ok_or_else(|| other(&format!("path {} was not valid unicode", p.display()))) .map(|bytes| { if bytes.contains(&b'\\') { // Normalize to Unix-style path separators let mut bytes = bytes.to_owned(); for b in &mut bytes { if *b == b'\\' { *b = b'/'; } } Cow::Owned(bytes) } else { Cow::Borrowed(bytes) } }) } #[cfg(any(unix, target_os = "redox"))] /// On unix this will never fail pub fn path2bytes(p: &Path) -> io::Result> { Ok(p.as_os_str().as_bytes()).map(Cow::Borrowed) } #[cfg(windows)] /// On windows we cannot accept non-unicode bytes because it /// is impossible to convert it to UTF-16. pub fn bytes2path(bytes: Cow<[u8]>) -> io::Result> { return match bytes { Cow::Borrowed(bytes) => { let s = r#try!(str::from_utf8(bytes).map_err(|_| not_unicode(bytes))); Ok(Cow::Borrowed(Path::new(s))) } Cow::Owned(bytes) => { let s = r#try!(String::from_utf8(bytes).map_err(|uerr| not_unicode(&uerr.into_bytes()))); Ok(Cow::Owned(PathBuf::from(s))) } }; fn not_unicode(v: &[u8]) -> io::Error { other(&format!( "only unicode paths are supported on windows: {}", String::from_utf8_lossy(v) )) } } #[cfg(any(unix, target_os = "redox"))] /// On unix this operation can never fail. pub fn bytes2path(bytes: Cow<[u8]>) -> io::Result> { use std::ffi::{OsStr, OsString}; Ok(match bytes { Cow::Borrowed(bytes) => Cow::Borrowed({ Path::new(OsStr::from_bytes(bytes)) }), Cow::Owned(bytes) => Cow::Owned({ PathBuf::from(OsString::from_vec(bytes)) }), }) } #[cfg(target_arch = "wasm32")] pub fn bytes2path(bytes: Cow<[u8]>) -> io::Result> { Ok(match bytes { Cow::Borrowed(bytes) => { Cow::Borrowed({ Path::new(str::from_utf8(bytes).map_err(invalid_utf8)?) }) } Cow::Owned(bytes) => { Cow::Owned({ PathBuf::from(String::from_utf8(bytes).map_err(invalid_utf8)?) }) } }) } #[cfg(target_arch = "wasm32")] fn invalid_utf8(_: T) -> io::Error { io::Error::new(io::ErrorKind::InvalidData, "Invalid utf8") } tar-0.4.26/src/lib.rs010066400017500001750000000031741346760774600125500ustar0000000000000000//! A library for reading and writing TAR archives //! //! This library provides utilities necessary to manage [TAR archives][1] //! abstracted over a reader or writer. Great strides are taken to ensure that //! an archive is never required to be fully resident in memory, and all objects //! provide largely a streaming interface to read bytes from. //! //! [1]: http://en.wikipedia.org/wiki/Tar_%28computing%29 // More docs about the detailed tar format can also be found here: // http://www.freebsd.org/cgi/man.cgi?query=tar&sektion=5&manpath=FreeBSD+8-current // NB: some of the coding patterns and idioms here may seem a little strange. // This is currently attempting to expose a super generic interface while // also not forcing clients to codegen the entire crate each time they use // it. To that end lots of work is done to ensure that concrete // implementations are all found in this crate and the generic functions are // all just super thin wrappers (e.g. easy to codegen). #![doc(html_root_url = "https://docs.rs/tar/0.4")] #![deny(missing_docs)] #![cfg_attr(test, deny(warnings))] use std::io::{Error, ErrorKind}; pub use crate::archive::{Archive, Entries}; pub use crate::builder::Builder; pub use crate::entry::{Entry, Unpacked}; pub use crate::entry_type::EntryType; pub use crate::header::GnuExtSparseHeader; pub use crate::header::{GnuHeader, GnuSparseHeader, Header, HeaderMode, OldHeader, UstarHeader}; pub use crate::pax::{PaxExtension, PaxExtensions}; mod archive; mod builder; mod entry; mod entry_type; mod error; mod header; mod pax; fn other(msg: &str) -> Error { Error::new(ErrorKind::Other, msg) } tar-0.4.26/src/pax.rs010066400017500001750000000053021345141040600125370ustar0000000000000000use std::io; use std::slice; use std::str; use crate::other; /// An iterator over the pax extensions in an archive entry. /// /// This iterator yields structures which can themselves be parsed into /// key/value pairs. pub struct PaxExtensions<'entry> { data: slice::Split<'entry, u8, fn(&u8) -> bool>, } /// A key/value pair corresponding to a pax extension. pub struct PaxExtension<'entry> { key: &'entry [u8], value: &'entry [u8], } pub fn pax_extensions(a: &[u8]) -> PaxExtensions { fn is_newline(a: &u8) -> bool { *a == b'\n' } PaxExtensions { data: a.split(is_newline), } } impl<'entry> Iterator for PaxExtensions<'entry> { type Item = io::Result>; fn next(&mut self) -> Option>> { let line = match self.data.next() { Some(line) if line.is_empty() => return None, Some(line) => line, None => return None, }; Some( line.iter() .position(|b| *b == b' ') .and_then(|i| { str::from_utf8(&line[..i]) .ok() .and_then(|len| len.parse::().ok().map(|j| (i + 1, j))) }) .and_then(|(kvstart, reported_len)| { if line.len() + 1 == reported_len { line[kvstart..] .iter() .position(|b| *b == b'=') .map(|equals| (kvstart, equals)) } else { None } }) .map(|(kvstart, equals)| PaxExtension { key: &line[kvstart..kvstart + equals], value: &line[kvstart + equals + 1..], }) .ok_or_else(|| other("malformed pax extension")), ) } } impl<'entry> PaxExtension<'entry> { /// Returns the key for this key/value pair parsed as a string. /// /// May fail if the key isn't actually utf-8. pub fn key(&self) -> Result<&'entry str, str::Utf8Error> { str::from_utf8(self.key) } /// Returns the underlying raw bytes for the key of this key/value pair. pub fn key_bytes(&self) -> &'entry [u8] { self.key } /// Returns the value for this key/value pair parsed as a string. /// /// May fail if the value isn't actually utf-8. pub fn value(&self) -> Result<&'entry str, str::Utf8Error> { str::from_utf8(self.value) } /// Returns the underlying raw bytes for this value of this key/value pair. pub fn value_bytes(&self) -> &'entry [u8] { self.value } } tar-0.4.26/tests/all.rs010066400017500001750000001002721345141053500130770ustar0000000000000000extern crate filetime; extern crate tar; extern crate tempdir; #[cfg(all(unix, feature = "xattr"))] extern crate xattr; use std::fs::{self, File}; use std::io::prelude::*; use std::io::{self, Cursor}; use std::iter::repeat; use std::path::{Path, PathBuf}; use self::tempdir::TempDir; use filetime::FileTime; use tar::{Archive, Builder, EntryType, Header}; macro_rules! t { ($e:expr) => { match $e { Ok(v) => v, Err(e) => panic!("{} returned {}", stringify!($e), e), } }; } macro_rules! tar { ($e:expr) => { &include_bytes!(concat!("archives/", $e))[..] }; } mod header; /// test that we can concatenate the simple.tar archive and extract the same entries twice when we /// use the ignore_zeros option. #[test] fn simple_concat() { let bytes = tar!("simple.tar"); let mut archive_bytes = Vec::new(); archive_bytes.extend(bytes); let original_names: Vec = decode_names(&mut Archive::new(Cursor::new(&archive_bytes))); let expected: Vec<&str> = original_names.iter().map(|n| n.as_str()).collect(); // concat two archives (with null in-between); archive_bytes.extend(bytes); // test now that when we read the archive, it stops processing at the first zero header. let actual = decode_names(&mut Archive::new(Cursor::new(&archive_bytes))); assert_eq!(expected, actual); // extend expected by itself. let expected: Vec<&str> = { let mut o = Vec::new(); o.extend(&expected); o.extend(&expected); o }; let mut ar = Archive::new(Cursor::new(&archive_bytes)); ar.set_ignore_zeros(true); let actual = decode_names(&mut ar); assert_eq!(expected, actual); fn decode_names(ar: &mut Archive) -> Vec where R: Read, { let mut names = Vec::new(); for entry in t!(ar.entries()) { let e = t!(entry); names.push(t!(::std::str::from_utf8(&e.path_bytes())).to_string()); } names } } #[test] fn header_impls() { let mut ar = Archive::new(Cursor::new(tar!("simple.tar"))); let hn = Header::new_old(); let hnb = hn.as_bytes(); for file in t!(ar.entries()) { let file = t!(file); let h1 = file.header(); let h1b = h1.as_bytes(); let h2 = h1.clone(); let h2b = h2.as_bytes(); assert!(h1b[..] == h2b[..] && h2b[..] != hnb[..]) } } #[test] fn header_impls_missing_last_header() { let mut ar = Archive::new(Cursor::new(tar!("simple_missing_last_header.tar"))); let hn = Header::new_old(); let hnb = hn.as_bytes(); for file in t!(ar.entries()) { let file = t!(file); let h1 = file.header(); let h1b = h1.as_bytes(); let h2 = h1.clone(); let h2b = h2.as_bytes(); assert!(h1b[..] == h2b[..] && h2b[..] != hnb[..]) } } #[test] fn reading_files() { let rdr = Cursor::new(tar!("reading_files.tar")); let mut ar = Archive::new(rdr); let mut entries = t!(ar.entries()); let mut a = t!(entries.next().unwrap()); assert_eq!(&*a.header().path_bytes(), b"a"); let mut s = String::new(); t!(a.read_to_string(&mut s)); assert_eq!(s, "a\na\na\na\na\na\na\na\na\na\na\n"); let mut b = t!(entries.next().unwrap()); assert_eq!(&*b.header().path_bytes(), b"b"); s.truncate(0); t!(b.read_to_string(&mut s)); assert_eq!(s, "b\nb\nb\nb\nb\nb\nb\nb\nb\nb\nb\n"); assert!(entries.next().is_none()); } #[test] fn writing_files() { let mut ar = Builder::new(Vec::new()); let td = t!(TempDir::new("tar-rs")); let path = td.path().join("test"); t!(t!(File::create(&path)).write_all(b"test")); t!(ar.append_file("test2", &mut t!(File::open(&path)))); let data = t!(ar.into_inner()); let mut ar = Archive::new(Cursor::new(data)); let mut entries = t!(ar.entries()); let mut f = t!(entries.next().unwrap()); assert_eq!(&*f.header().path_bytes(), b"test2"); assert_eq!(f.header().size().unwrap(), 4); let mut s = String::new(); t!(f.read_to_string(&mut s)); assert_eq!(s, "test"); assert!(entries.next().is_none()); } #[test] fn large_filename() { let mut ar = Builder::new(Vec::new()); let td = t!(TempDir::new("tar-rs")); let path = td.path().join("test"); t!(t!(File::create(&path)).write_all(b"test")); let filename = repeat("abcd/").take(50).collect::(); let mut header = Header::new_ustar(); header.set_path(&filename).unwrap(); header.set_metadata(&t!(fs::metadata(&path))); header.set_cksum(); t!(ar.append(&header, &b"test"[..])); let too_long = repeat("abcd").take(200).collect::(); t!(ar.append_file(&too_long, &mut t!(File::open(&path)))); t!(ar.append_data(&mut header, &too_long, &b"test"[..])); let rd = Cursor::new(t!(ar.into_inner())); let mut ar = Archive::new(rd); let mut entries = t!(ar.entries()); // The short entry added with `append` let mut f = entries.next().unwrap().unwrap(); assert_eq!(&*f.header().path_bytes(), filename.as_bytes()); assert_eq!(f.header().size().unwrap(), 4); let mut s = String::new(); t!(f.read_to_string(&mut s)); assert_eq!(s, "test"); // The long entry added with `append_file` let mut f = entries.next().unwrap().unwrap(); assert_eq!(&*f.path_bytes(), too_long.as_bytes()); assert_eq!(f.header().size().unwrap(), 4); let mut s = String::new(); t!(f.read_to_string(&mut s)); assert_eq!(s, "test"); // The long entry added with `append_data` let mut f = entries.next().unwrap().unwrap(); assert!(f.header().path_bytes().len() < too_long.len()); assert_eq!(&*f.path_bytes(), too_long.as_bytes()); assert_eq!(f.header().size().unwrap(), 4); let mut s = String::new(); t!(f.read_to_string(&mut s)); assert_eq!(s, "test"); assert!(entries.next().is_none()); } #[test] fn reading_entries() { let rdr = Cursor::new(tar!("reading_files.tar")); let mut ar = Archive::new(rdr); let mut entries = t!(ar.entries()); let mut a = t!(entries.next().unwrap()); assert_eq!(&*a.header().path_bytes(), b"a"); let mut s = String::new(); t!(a.read_to_string(&mut s)); assert_eq!(s, "a\na\na\na\na\na\na\na\na\na\na\n"); s.truncate(0); t!(a.read_to_string(&mut s)); assert_eq!(s, ""); let mut b = t!(entries.next().unwrap()); assert_eq!(&*b.header().path_bytes(), b"b"); s.truncate(0); t!(b.read_to_string(&mut s)); assert_eq!(s, "b\nb\nb\nb\nb\nb\nb\nb\nb\nb\nb\n"); assert!(entries.next().is_none()); } fn check_dirtree(td: &TempDir) { let dir_a = td.path().join("a"); let dir_b = td.path().join("a/b"); let file_c = td.path().join("a/c"); assert!(fs::metadata(&dir_a).map(|m| m.is_dir()).unwrap_or(false)); assert!(fs::metadata(&dir_b).map(|m| m.is_dir()).unwrap_or(false)); assert!(fs::metadata(&file_c).map(|m| m.is_file()).unwrap_or(false)); } #[test] fn extracting_directories() { let td = t!(TempDir::new("tar-rs")); let rdr = Cursor::new(tar!("directory.tar")); let mut ar = Archive::new(rdr); t!(ar.unpack(td.path())); check_dirtree(&td); } #[test] #[cfg(all(unix, feature = "xattr"))] fn xattrs() { // If /tmp is a tmpfs, xattr will fail // The xattr crate's unit tests also use /var/tmp for this reason let td = t!(TempDir::new_in("/var/tmp", "tar-rs")); let rdr = Cursor::new(tar!("xattrs.tar")); let mut ar = Archive::new(rdr); ar.set_unpack_xattrs(true); t!(ar.unpack(td.path())); let val = xattr::get(td.path().join("a/b"), "user.pax.flags").unwrap(); assert_eq!(val.unwrap(), "epm".as_bytes()); } #[test] #[cfg(all(unix, feature = "xattr"))] fn no_xattrs() { // If /tmp is a tmpfs, xattr will fail // The xattr crate's unit tests also use /var/tmp for this reason let td = t!(TempDir::new_in("/var/tmp", "tar-rs")); let rdr = Cursor::new(tar!("xattrs.tar")); let mut ar = Archive::new(rdr); ar.set_unpack_xattrs(false); t!(ar.unpack(td.path())); assert_eq!( xattr::get(td.path().join("a/b"), "user.pax.flags").unwrap(), None ); } #[test] fn writing_and_extracting_directories() { let td = t!(TempDir::new("tar-rs")); let mut ar = Builder::new(Vec::new()); let tmppath = td.path().join("tmpfile"); t!(t!(File::create(&tmppath)).write_all(b"c")); t!(ar.append_dir("a", ".")); t!(ar.append_dir("a/b", ".")); t!(ar.append_file("a/c", &mut t!(File::open(&tmppath)))); t!(ar.finish()); let rdr = Cursor::new(t!(ar.into_inner())); let mut ar = Archive::new(rdr); t!(ar.unpack(td.path())); check_dirtree(&td); } #[test] fn writing_directories_recursively() { let td = t!(TempDir::new("tar-rs")); let base_dir = td.path().join("base"); t!(fs::create_dir(&base_dir)); t!(t!(File::create(base_dir.join("file1"))).write_all(b"file1")); let sub_dir = base_dir.join("sub"); t!(fs::create_dir(&sub_dir)); t!(t!(File::create(sub_dir.join("file2"))).write_all(b"file2")); let mut ar = Builder::new(Vec::new()); t!(ar.append_dir_all("foobar", base_dir)); let data = t!(ar.into_inner()); let mut ar = Archive::new(Cursor::new(data)); t!(ar.unpack(td.path())); let base_dir = td.path().join("foobar"); assert!(fs::metadata(&base_dir).map(|m| m.is_dir()).unwrap_or(false)); let file1_path = base_dir.join("file1"); assert!(fs::metadata(&file1_path) .map(|m| m.is_file()) .unwrap_or(false)); let sub_dir = base_dir.join("sub"); assert!(fs::metadata(&sub_dir).map(|m| m.is_dir()).unwrap_or(false)); let file2_path = sub_dir.join("file2"); assert!(fs::metadata(&file2_path) .map(|m| m.is_file()) .unwrap_or(false)); } #[test] fn append_dir_all_blank_dest() { let td = t!(TempDir::new("tar-rs")); let base_dir = td.path().join("base"); t!(fs::create_dir(&base_dir)); t!(t!(File::create(base_dir.join("file1"))).write_all(b"file1")); let sub_dir = base_dir.join("sub"); t!(fs::create_dir(&sub_dir)); t!(t!(File::create(sub_dir.join("file2"))).write_all(b"file2")); let mut ar = Builder::new(Vec::new()); t!(ar.append_dir_all("", base_dir)); let data = t!(ar.into_inner()); let mut ar = Archive::new(Cursor::new(data)); t!(ar.unpack(td.path())); let base_dir = td.path(); assert!(fs::metadata(&base_dir).map(|m| m.is_dir()).unwrap_or(false)); let file1_path = base_dir.join("file1"); assert!(fs::metadata(&file1_path) .map(|m| m.is_file()) .unwrap_or(false)); let sub_dir = base_dir.join("sub"); assert!(fs::metadata(&sub_dir).map(|m| m.is_dir()).unwrap_or(false)); let file2_path = sub_dir.join("file2"); assert!(fs::metadata(&file2_path) .map(|m| m.is_file()) .unwrap_or(false)); } #[test] fn append_dir_all_does_not_work_on_non_directory() { let td = t!(TempDir::new("tar-rs")); let path = td.path().join("test"); t!(t!(File::create(&path)).write_all(b"test")); let mut ar = Builder::new(Vec::new()); let result = ar.append_dir_all("test", path); assert!(result.is_err()); } #[test] fn extracting_duplicate_dirs() { let td = t!(TempDir::new("tar-rs")); let rdr = Cursor::new(tar!("duplicate_dirs.tar")); let mut ar = Archive::new(rdr); t!(ar.unpack(td.path())); let some_dir = td.path().join("some_dir"); assert!(fs::metadata(&some_dir).map(|m| m.is_dir()).unwrap_or(false)); } #[test] fn unpack_old_style_bsd_dir() { let td = t!(TempDir::new("tar-rs")); let mut ar = Builder::new(Vec::new()); let mut header = Header::new_old(); header.set_entry_type(EntryType::Regular); t!(header.set_path("testdir/")); header.set_size(0); header.set_cksum(); t!(ar.append(&header, &mut io::empty())); // Extracting let rdr = Cursor::new(t!(ar.into_inner())); let mut ar = Archive::new(rdr); t!(ar.unpack(td.path())); // Iterating let rdr = Cursor::new(ar.into_inner().into_inner()); let mut ar = Archive::new(rdr); assert!(t!(ar.entries()).all(|fr| fr.is_ok())); assert!(td.path().join("testdir").is_dir()); } #[test] fn handling_incorrect_file_size() { let td = t!(TempDir::new("tar-rs")); let mut ar = Builder::new(Vec::new()); let path = td.path().join("tmpfile"); t!(File::create(&path)); let mut file = t!(File::open(&path)); let mut header = Header::new_old(); t!(header.set_path("somepath")); header.set_metadata(&t!(file.metadata())); header.set_size(2048); // past the end of file null blocks header.set_cksum(); t!(ar.append(&header, &mut file)); // Extracting let rdr = Cursor::new(t!(ar.into_inner())); let mut ar = Archive::new(rdr); assert!(ar.unpack(td.path()).is_err()); // Iterating let rdr = Cursor::new(ar.into_inner().into_inner()); let mut ar = Archive::new(rdr); assert!(t!(ar.entries()).any(|fr| fr.is_err())); } #[test] fn extracting_malicious_tarball() { let td = t!(TempDir::new("tar-rs")); let mut evil_tar = Vec::new(); { let mut a = Builder::new(&mut evil_tar); let mut append = |path: &str| { let mut header = Header::new_gnu(); assert!(header.set_path(path).is_err(), "was ok: {:?}", path); { let h = header.as_gnu_mut().unwrap(); for (a, b) in h.name.iter_mut().zip(path.as_bytes()) { *a = *b; } } header.set_size(1); header.set_cksum(); t!(a.append(&header, io::repeat(1).take(1))); }; append("/tmp/abs_evil.txt"); append("//tmp/abs_evil2.txt"); append("///tmp/abs_evil3.txt"); append("/./tmp/abs_evil4.txt"); append("//./tmp/abs_evil5.txt"); append("///./tmp/abs_evil6.txt"); append("/../tmp/rel_evil.txt"); append("../rel_evil2.txt"); append("./../rel_evil3.txt"); append("some/../../rel_evil4.txt"); append(""); append("././//./.."); append(".."); append("/////////.."); append("/////////"); } let mut ar = Archive::new(&evil_tar[..]); t!(ar.unpack(td.path())); assert!(fs::metadata("/tmp/abs_evil.txt").is_err()); assert!(fs::metadata("/tmp/abs_evil.txt2").is_err()); assert!(fs::metadata("/tmp/abs_evil.txt3").is_err()); assert!(fs::metadata("/tmp/abs_evil.txt4").is_err()); assert!(fs::metadata("/tmp/abs_evil.txt5").is_err()); assert!(fs::metadata("/tmp/abs_evil.txt6").is_err()); assert!(fs::metadata("/tmp/rel_evil.txt").is_err()); assert!(fs::metadata("/tmp/rel_evil.txt").is_err()); assert!(fs::metadata(td.path().join("../tmp/rel_evil.txt")).is_err()); assert!(fs::metadata(td.path().join("../rel_evil2.txt")).is_err()); assert!(fs::metadata(td.path().join("../rel_evil3.txt")).is_err()); assert!(fs::metadata(td.path().join("../rel_evil4.txt")).is_err()); // The `some` subdirectory should not be created because the only // filename that references this has '..'. assert!(fs::metadata(td.path().join("some")).is_err()); // The `tmp` subdirectory should be created and within this // subdirectory, there should be files named `abs_evil.txt` through // `abs_evil6.txt`. assert!(fs::metadata(td.path().join("tmp")) .map(|m| m.is_dir()) .unwrap_or(false)); assert!(fs::metadata(td.path().join("tmp/abs_evil.txt")) .map(|m| m.is_file()) .unwrap_or(false)); assert!(fs::metadata(td.path().join("tmp/abs_evil2.txt")) .map(|m| m.is_file()) .unwrap_or(false)); assert!(fs::metadata(td.path().join("tmp/abs_evil3.txt")) .map(|m| m.is_file()) .unwrap_or(false)); assert!(fs::metadata(td.path().join("tmp/abs_evil4.txt")) .map(|m| m.is_file()) .unwrap_or(false)); assert!(fs::metadata(td.path().join("tmp/abs_evil5.txt")) .map(|m| m.is_file()) .unwrap_or(false)); assert!(fs::metadata(td.path().join("tmp/abs_evil6.txt")) .map(|m| m.is_file()) .unwrap_or(false)); } #[test] fn octal_spaces() { let rdr = Cursor::new(tar!("spaces.tar")); let mut ar = Archive::new(rdr); let entry = ar.entries().unwrap().next().unwrap().unwrap(); assert_eq!(entry.header().mode().unwrap() & 0o777, 0o777); assert_eq!(entry.header().uid().unwrap(), 0); assert_eq!(entry.header().gid().unwrap(), 0); assert_eq!(entry.header().size().unwrap(), 2); assert_eq!(entry.header().mtime().unwrap(), 0o12440016664); assert_eq!(entry.header().cksum().unwrap(), 0o4253); } #[test] fn extracting_malformed_tar_null_blocks() { let td = t!(TempDir::new("tar-rs")); let mut ar = Builder::new(Vec::new()); let path1 = td.path().join("tmpfile1"); let path2 = td.path().join("tmpfile2"); t!(File::create(&path1)); t!(File::create(&path2)); t!(ar.append_file("tmpfile1", &mut t!(File::open(&path1)))); let mut data = t!(ar.into_inner()); let amt = data.len(); data.truncate(amt - 512); let mut ar = Builder::new(data); t!(ar.append_file("tmpfile2", &mut t!(File::open(&path2)))); t!(ar.finish()); let data = t!(ar.into_inner()); let mut ar = Archive::new(&data[..]); assert!(ar.unpack(td.path()).is_ok()); } #[test] fn empty_filename() { let td = t!(TempDir::new("tar-rs")); let rdr = Cursor::new(tar!("empty_filename.tar")); let mut ar = Archive::new(rdr); assert!(ar.unpack(td.path()).is_ok()); } #[test] fn file_times() { let td = t!(TempDir::new("tar-rs")); let rdr = Cursor::new(tar!("file_times.tar")); let mut ar = Archive::new(rdr); t!(ar.unpack(td.path())); let meta = fs::metadata(td.path().join("a")).unwrap(); let mtime = FileTime::from_last_modification_time(&meta); let atime = FileTime::from_last_access_time(&meta); assert_eq!(mtime.unix_seconds(), 1000000000); assert_eq!(mtime.nanoseconds(), 0); assert_eq!(atime.unix_seconds(), 1000000000); assert_eq!(atime.nanoseconds(), 0); } #[test] fn backslash_treated_well() { // Insert a file into an archive with a backslash let td = t!(TempDir::new("tar-rs")); let mut ar = Builder::new(Vec::::new()); t!(ar.append_dir("foo\\bar", td.path())); let mut ar = Archive::new(Cursor::new(t!(ar.into_inner()))); let f = t!(t!(ar.entries()).next().unwrap()); if cfg!(unix) { assert_eq!(t!(f.header().path()).to_str(), Some("foo\\bar")); } else { assert_eq!(t!(f.header().path()).to_str(), Some("foo/bar")); } // Unpack an archive with a backslash in the name let mut ar = Builder::new(Vec::::new()); let mut header = Header::new_gnu(); header.set_metadata(&t!(fs::metadata(td.path()))); header.set_size(0); for (a, b) in header.as_old_mut().name.iter_mut().zip(b"foo\\bar\x00") { *a = *b; } header.set_cksum(); t!(ar.append(&header, &mut io::empty())); let data = t!(ar.into_inner()); let mut ar = Archive::new(&data[..]); let f = t!(t!(ar.entries()).next().unwrap()); assert_eq!(t!(f.header().path()).to_str(), Some("foo\\bar")); let mut ar = Archive::new(&data[..]); t!(ar.unpack(td.path())); assert!(fs::metadata(td.path().join("foo\\bar")).is_ok()); } #[cfg(unix)] #[test] fn nul_bytes_in_path() { use std::ffi::OsStr; use std::os::unix::prelude::*; let nul_path = OsStr::from_bytes(b"foo\0"); let td = t!(TempDir::new("tar-rs")); let mut ar = Builder::new(Vec::::new()); let err = ar.append_dir(nul_path, td.path()).unwrap_err(); assert!(err.to_string().contains("contains a nul byte")); } #[test] fn links() { let mut ar = Archive::new(Cursor::new(tar!("link.tar"))); let mut entries = t!(ar.entries()); let link = t!(entries.next().unwrap()); assert_eq!( t!(link.header().link_name()).as_ref().map(|p| &**p), Some(Path::new("file")) ); let other = t!(entries.next().unwrap()); assert!(t!(other.header().link_name()).is_none()); } #[test] #[cfg(unix)] // making symlinks on windows is hard fn unpack_links() { let td = t!(TempDir::new("tar-rs")); let mut ar = Archive::new(Cursor::new(tar!("link.tar"))); t!(ar.unpack(td.path())); let md = t!(fs::symlink_metadata(td.path().join("lnk"))); assert!(md.file_type().is_symlink()); assert_eq!( &*t!(fs::read_link(td.path().join("lnk"))), Path::new("file") ); t!(File::open(td.path().join("lnk"))); } #[test] fn pax_simple() { let mut ar = Archive::new(tar!("pax.tar")); let mut entries = t!(ar.entries()); let mut first = t!(entries.next().unwrap()); let mut attributes = t!(first.pax_extensions()).unwrap(); let first = t!(attributes.next().unwrap()); let second = t!(attributes.next().unwrap()); let third = t!(attributes.next().unwrap()); assert!(attributes.next().is_none()); assert_eq!(first.key(), Ok("mtime")); assert_eq!(first.value(), Ok("1453146164.953123768")); assert_eq!(second.key(), Ok("atime")); assert_eq!(second.value(), Ok("1453251915.24892486")); assert_eq!(third.key(), Ok("ctime")); assert_eq!(third.value(), Ok("1453146164.953123768")); } #[test] fn pax_path() { let mut ar = Archive::new(tar!("pax2.tar")); let mut entries = t!(ar.entries()); let first = t!(entries.next().unwrap()); assert!(first.path().unwrap().ends_with("aaaaaaaaaaaaaaa")); } #[test] fn long_name_trailing_nul() { let mut b = Builder::new(Vec::::new()); let mut h = Header::new_gnu(); t!(h.set_path("././@LongLink")); h.set_size(4); h.set_entry_type(EntryType::new(b'L')); h.set_cksum(); t!(b.append(&h, "foo\0".as_bytes())); let mut h = Header::new_gnu(); t!(h.set_path("bar")); h.set_size(6); h.set_entry_type(EntryType::file()); h.set_cksum(); t!(b.append(&h, "foobar".as_bytes())); let contents = t!(b.into_inner()); let mut a = Archive::new(&contents[..]); let e = t!(t!(a.entries()).next().unwrap()); assert_eq!(&*e.path_bytes(), b"foo"); } #[test] fn long_linkname_trailing_nul() { let mut b = Builder::new(Vec::::new()); let mut h = Header::new_gnu(); t!(h.set_path("././@LongLink")); h.set_size(4); h.set_entry_type(EntryType::new(b'K')); h.set_cksum(); t!(b.append(&h, "foo\0".as_bytes())); let mut h = Header::new_gnu(); t!(h.set_path("bar")); h.set_size(6); h.set_entry_type(EntryType::file()); h.set_cksum(); t!(b.append(&h, "foobar".as_bytes())); let contents = t!(b.into_inner()); let mut a = Archive::new(&contents[..]); let e = t!(t!(a.entries()).next().unwrap()); assert_eq!(&*e.link_name_bytes().unwrap(), b"foo"); } #[test] fn encoded_long_name_has_trailing_nul() { let td = t!(TempDir::new("tar-rs")); let path = td.path().join("foo"); t!(t!(File::create(&path)).write_all(b"test")); let mut b = Builder::new(Vec::::new()); let long = repeat("abcd").take(200).collect::(); t!(b.append_file(&long, &mut t!(File::open(&path)))); let contents = t!(b.into_inner()); let mut a = Archive::new(&contents[..]); let mut e = t!(t!(a.entries()).raw(true).next().unwrap()); let mut name = Vec::new(); t!(e.read_to_end(&mut name)); assert_eq!(name[name.len() - 1], 0); let header_name = &e.header().as_gnu().unwrap().name; assert!(header_name.starts_with(b"././@LongLink\x00")); } #[test] fn reading_sparse() { let rdr = Cursor::new(tar!("sparse.tar")); let mut ar = Archive::new(rdr); let mut entries = t!(ar.entries()); let mut a = t!(entries.next().unwrap()); let mut s = String::new(); assert_eq!(&*a.header().path_bytes(), b"sparse_begin.txt"); t!(a.read_to_string(&mut s)); assert_eq!(&s[..5], "test\n"); assert!(s[5..].chars().all(|x| x == '\u{0}')); let mut a = t!(entries.next().unwrap()); let mut s = String::new(); assert_eq!(&*a.header().path_bytes(), b"sparse_end.txt"); t!(a.read_to_string(&mut s)); assert!(s[..s.len() - 9].chars().all(|x| x == '\u{0}')); assert_eq!(&s[s.len() - 9..], "test_end\n"); let mut a = t!(entries.next().unwrap()); let mut s = String::new(); assert_eq!(&*a.header().path_bytes(), b"sparse_ext.txt"); t!(a.read_to_string(&mut s)); assert!(s[..0x1000].chars().all(|x| x == '\u{0}')); assert_eq!(&s[0x1000..0x1000 + 5], "text\n"); assert!(s[0x1000 + 5..0x3000].chars().all(|x| x == '\u{0}')); assert_eq!(&s[0x3000..0x3000 + 5], "text\n"); assert!(s[0x3000 + 5..0x5000].chars().all(|x| x == '\u{0}')); assert_eq!(&s[0x5000..0x5000 + 5], "text\n"); assert!(s[0x5000 + 5..0x7000].chars().all(|x| x == '\u{0}')); assert_eq!(&s[0x7000..0x7000 + 5], "text\n"); assert!(s[0x7000 + 5..0x9000].chars().all(|x| x == '\u{0}')); assert_eq!(&s[0x9000..0x9000 + 5], "text\n"); assert!(s[0x9000 + 5..0xb000].chars().all(|x| x == '\u{0}')); assert_eq!(&s[0xb000..0xb000 + 5], "text\n"); let mut a = t!(entries.next().unwrap()); let mut s = String::new(); assert_eq!(&*a.header().path_bytes(), b"sparse.txt"); t!(a.read_to_string(&mut s)); assert!(s[..0x1000].chars().all(|x| x == '\u{0}')); assert_eq!(&s[0x1000..0x1000 + 6], "hello\n"); assert!(s[0x1000 + 6..0x2fa0].chars().all(|x| x == '\u{0}')); assert_eq!(&s[0x2fa0..0x2fa0 + 6], "world\n"); assert!(s[0x2fa0 + 6..0x4000].chars().all(|x| x == '\u{0}')); assert!(entries.next().is_none()); } #[test] fn extract_sparse() { let rdr = Cursor::new(tar!("sparse.tar")); let mut ar = Archive::new(rdr); let td = t!(TempDir::new("tar-rs")); t!(ar.unpack(td.path())); let mut s = String::new(); t!(t!(File::open(td.path().join("sparse_begin.txt"))).read_to_string(&mut s)); assert_eq!(&s[..5], "test\n"); assert!(s[5..].chars().all(|x| x == '\u{0}')); s.truncate(0); t!(t!(File::open(td.path().join("sparse_end.txt"))).read_to_string(&mut s)); assert!(s[..s.len() - 9].chars().all(|x| x == '\u{0}')); assert_eq!(&s[s.len() - 9..], "test_end\n"); s.truncate(0); t!(t!(File::open(td.path().join("sparse_ext.txt"))).read_to_string(&mut s)); assert!(s[..0x1000].chars().all(|x| x == '\u{0}')); assert_eq!(&s[0x1000..0x1000 + 5], "text\n"); assert!(s[0x1000 + 5..0x3000].chars().all(|x| x == '\u{0}')); assert_eq!(&s[0x3000..0x3000 + 5], "text\n"); assert!(s[0x3000 + 5..0x5000].chars().all(|x| x == '\u{0}')); assert_eq!(&s[0x5000..0x5000 + 5], "text\n"); assert!(s[0x5000 + 5..0x7000].chars().all(|x| x == '\u{0}')); assert_eq!(&s[0x7000..0x7000 + 5], "text\n"); assert!(s[0x7000 + 5..0x9000].chars().all(|x| x == '\u{0}')); assert_eq!(&s[0x9000..0x9000 + 5], "text\n"); assert!(s[0x9000 + 5..0xb000].chars().all(|x| x == '\u{0}')); assert_eq!(&s[0xb000..0xb000 + 5], "text\n"); s.truncate(0); t!(t!(File::open(td.path().join("sparse.txt"))).read_to_string(&mut s)); assert!(s[..0x1000].chars().all(|x| x == '\u{0}')); assert_eq!(&s[0x1000..0x1000 + 6], "hello\n"); assert!(s[0x1000 + 6..0x2fa0].chars().all(|x| x == '\u{0}')); assert_eq!(&s[0x2fa0..0x2fa0 + 6], "world\n"); assert!(s[0x2fa0 + 6..0x4000].chars().all(|x| x == '\u{0}')); } #[test] fn path_separators() { let mut ar = Builder::new(Vec::new()); let td = t!(TempDir::new("tar-rs")); let path = td.path().join("test"); t!(t!(File::create(&path)).write_all(b"test")); let short_path: PathBuf = repeat("abcd").take(2).collect(); let long_path: PathBuf = repeat("abcd").take(50).collect(); // Make sure UStar headers normalize to Unix path separators let mut header = Header::new_ustar(); t!(header.set_path(&short_path)); assert_eq!(t!(header.path()), short_path); assert!(!header.path_bytes().contains(&b'\\')); t!(header.set_path(&long_path)); assert_eq!(t!(header.path()), long_path); assert!(!header.path_bytes().contains(&b'\\')); // Make sure GNU headers normalize to Unix path separators, // including the `@LongLink` fallback used by `append_file`. t!(ar.append_file(&short_path, &mut t!(File::open(&path)))); t!(ar.append_file(&long_path, &mut t!(File::open(&path)))); let rd = Cursor::new(t!(ar.into_inner())); let mut ar = Archive::new(rd); let mut entries = t!(ar.entries()); let entry = t!(entries.next().unwrap()); assert_eq!(t!(entry.path()), short_path); assert!(!entry.path_bytes().contains(&b'\\')); let entry = t!(entries.next().unwrap()); assert_eq!(t!(entry.path()), long_path); assert!(!entry.path_bytes().contains(&b'\\')); assert!(entries.next().is_none()); } #[test] #[cfg(unix)] fn append_path_symlink() { use std::borrow::Cow; use std::env; use std::os::unix::fs::symlink; let mut ar = Builder::new(Vec::new()); ar.follow_symlinks(false); let td = t!(TempDir::new("tar-rs")); let long_linkname = repeat("abcd").take(30).collect::(); let long_pathname = repeat("dcba").take(30).collect::(); t!(env::set_current_dir(td.path())); // "short" path name / short link name t!(symlink("testdest", "test")); t!(ar.append_path("test")); // short path name / long link name t!(symlink(&long_linkname, "test2")); t!(ar.append_path("test2")); // long path name / long link name t!(symlink(&long_linkname, &long_pathname)); t!(ar.append_path(&long_pathname)); let rd = Cursor::new(t!(ar.into_inner())); let mut ar = Archive::new(rd); let mut entries = t!(ar.entries()); let entry = t!(entries.next().unwrap()); assert_eq!(t!(entry.path()), Path::new("test")); assert_eq!( t!(entry.link_name()), Some(Cow::from(Path::new("testdest"))) ); assert_eq!(t!(entry.header().size()), 0); let entry = t!(entries.next().unwrap()); assert_eq!(t!(entry.path()), Path::new("test2")); assert_eq!( t!(entry.link_name()), Some(Cow::from(Path::new(&long_linkname))) ); assert_eq!(t!(entry.header().size()), 0); let entry = t!(entries.next().unwrap()); assert_eq!(t!(entry.path()), Path::new(&long_pathname)); assert_eq!( t!(entry.link_name()), Some(Cow::from(Path::new(&long_linkname))) ); assert_eq!(t!(entry.header().size()), 0); assert!(entries.next().is_none()); } #[test] fn name_with_slash_doesnt_fool_long_link_and_bsd_compat() { let td = t!(TempDir::new("tar-rs")); let mut ar = Builder::new(Vec::new()); let mut h = Header::new_gnu(); t!(h.set_path("././@LongLink")); h.set_size(4); h.set_entry_type(EntryType::new(b'L')); h.set_cksum(); t!(ar.append(&h, "foo\0".as_bytes())); let mut header = Header::new_gnu(); header.set_entry_type(EntryType::Regular); t!(header.set_path("testdir/")); header.set_size(0); header.set_cksum(); t!(ar.append(&header, &mut io::empty())); // Extracting let rdr = Cursor::new(t!(ar.into_inner())); let mut ar = Archive::new(rdr); t!(ar.unpack(td.path())); // Iterating let rdr = Cursor::new(ar.into_inner().into_inner()); let mut ar = Archive::new(rdr); assert!(t!(ar.entries()).all(|fr| fr.is_ok())); assert!(td.path().join("foo").is_file()); } #[test] fn insert_local_file_different_name() { let mut ar = Builder::new(Vec::new()); let td = t!(TempDir::new("tar-rs")); let path = td.path().join("directory"); t!(fs::create_dir(&path)); ar.append_path_with_name(&path, "archive/dir").unwrap(); let path = td.path().join("file"); t!(t!(File::create(&path)).write_all(b"test")); ar.append_path_with_name(&path, "archive/dir/f").unwrap(); let rd = Cursor::new(t!(ar.into_inner())); let mut ar = Archive::new(rd); let mut entries = t!(ar.entries()); let entry = t!(entries.next().unwrap()); assert_eq!(t!(entry.path()), Path::new("archive/dir")); let entry = t!(entries.next().unwrap()); assert_eq!(t!(entry.path()), Path::new("archive/dir/f")); assert!(entries.next().is_none()); } #[test] #[cfg(unix)] fn tar_directory_containing_symlink_to_directory() { use std::os::unix::fs::symlink; let td = t!(TempDir::new("tar-rs")); let dummy_src = t!(TempDir::new("dummy_src")); let dummy_dst = td.path().join("dummy_dst"); let mut ar = Builder::new(Vec::new()); t!(symlink(dummy_src.path().display().to_string(), &dummy_dst)); assert!(dummy_dst.read_link().is_ok()); assert!(dummy_dst.read_link().unwrap().is_dir()); ar.append_dir_all("symlinks", td.path()).unwrap(); ar.finish().unwrap(); } tar-0.4.26/tests/entry.rs010066400017500001750000000233101343731660400134730ustar0000000000000000extern crate tar; extern crate tempdir; use std::fs::File; use std::io::Read; use tempdir::TempDir; macro_rules! t { ($e:expr) => { match $e { Ok(v) => v, Err(e) => panic!("{} returned {}", stringify!($e), e), } }; } #[test] fn absolute_symlink() { let mut ar = tar::Builder::new(Vec::new()); let mut header = tar::Header::new_gnu(); header.set_size(0); header.set_entry_type(tar::EntryType::Symlink); t!(header.set_path("foo")); t!(header.set_link_name("/bar")); header.set_cksum(); t!(ar.append(&header, &[][..])); let bytes = t!(ar.into_inner()); let mut ar = tar::Archive::new(&bytes[..]); let td = t!(TempDir::new("tar")); t!(ar.unpack(td.path())); t!(td.path().join("foo").symlink_metadata()); let mut ar = tar::Archive::new(&bytes[..]); let mut entries = t!(ar.entries()); let entry = t!(entries.next().unwrap()); assert_eq!(&*entry.link_name_bytes().unwrap(), b"/bar"); } #[test] fn absolute_hardlink() { let td = t!(TempDir::new("tar")); let mut ar = tar::Builder::new(Vec::new()); let mut header = tar::Header::new_gnu(); header.set_size(0); header.set_entry_type(tar::EntryType::Regular); t!(header.set_path("foo")); header.set_cksum(); t!(ar.append(&header, &[][..])); let mut header = tar::Header::new_gnu(); header.set_size(0); header.set_entry_type(tar::EntryType::Link); t!(header.set_path("bar")); // This absolute path under tempdir will be created at unpack time t!(header.set_link_name(td.path().join("foo"))); header.set_cksum(); t!(ar.append(&header, &[][..])); let bytes = t!(ar.into_inner()); let mut ar = tar::Archive::new(&bytes[..]); t!(ar.unpack(td.path())); t!(td.path().join("foo").metadata()); t!(td.path().join("bar").metadata()); } #[test] fn relative_hardlink() { let mut ar = tar::Builder::new(Vec::new()); let mut header = tar::Header::new_gnu(); header.set_size(0); header.set_entry_type(tar::EntryType::Regular); t!(header.set_path("foo")); header.set_cksum(); t!(ar.append(&header, &[][..])); let mut header = tar::Header::new_gnu(); header.set_size(0); header.set_entry_type(tar::EntryType::Link); t!(header.set_path("bar")); t!(header.set_link_name("foo")); header.set_cksum(); t!(ar.append(&header, &[][..])); let bytes = t!(ar.into_inner()); let mut ar = tar::Archive::new(&bytes[..]); let td = t!(TempDir::new("tar")); t!(ar.unpack(td.path())); t!(td.path().join("foo").metadata()); t!(td.path().join("bar").metadata()); } #[test] fn absolute_link_deref_error() { let mut ar = tar::Builder::new(Vec::new()); let mut header = tar::Header::new_gnu(); header.set_size(0); header.set_entry_type(tar::EntryType::Symlink); t!(header.set_path("foo")); t!(header.set_link_name("/")); header.set_cksum(); t!(ar.append(&header, &[][..])); let mut header = tar::Header::new_gnu(); header.set_size(0); header.set_entry_type(tar::EntryType::Regular); t!(header.set_path("foo/bar")); header.set_cksum(); t!(ar.append(&header, &[][..])); let bytes = t!(ar.into_inner()); let mut ar = tar::Archive::new(&bytes[..]); let td = t!(TempDir::new("tar")); assert!(ar.unpack(td.path()).is_err()); t!(td.path().join("foo").symlink_metadata()); assert!(File::open(td.path().join("foo").join("bar")).is_err()); } #[test] fn relative_link_deref_error() { let mut ar = tar::Builder::new(Vec::new()); let mut header = tar::Header::new_gnu(); header.set_size(0); header.set_entry_type(tar::EntryType::Symlink); t!(header.set_path("foo")); t!(header.set_link_name("../../../../")); header.set_cksum(); t!(ar.append(&header, &[][..])); let mut header = tar::Header::new_gnu(); header.set_size(0); header.set_entry_type(tar::EntryType::Regular); t!(header.set_path("foo/bar")); header.set_cksum(); t!(ar.append(&header, &[][..])); let bytes = t!(ar.into_inner()); let mut ar = tar::Archive::new(&bytes[..]); let td = t!(TempDir::new("tar")); assert!(ar.unpack(td.path()).is_err()); t!(td.path().join("foo").symlink_metadata()); assert!(File::open(td.path().join("foo").join("bar")).is_err()); } #[test] #[cfg(unix)] fn directory_maintains_permissions() { use ::std::os::unix::fs::PermissionsExt; let mut ar = tar::Builder::new(Vec::new()); let mut header = tar::Header::new_gnu(); header.set_size(0); header.set_entry_type(tar::EntryType::Directory); t!(header.set_path("foo")); header.set_mode(0o777); header.set_cksum(); t!(ar.append(&header, &[][..])); let bytes = t!(ar.into_inner()); let mut ar = tar::Archive::new(&bytes[..]); let td = t!(TempDir::new("tar")); t!(ar.unpack(td.path())); let f = t!(File::open(td.path().join("foo"))); let md = t!(f.metadata()); assert!(md.is_dir()); assert_eq!(md.permissions().mode(), 0o40777); } #[test] fn modify_link_just_created() { let mut ar = tar::Builder::new(Vec::new()); let mut header = tar::Header::new_gnu(); header.set_size(0); header.set_entry_type(tar::EntryType::Symlink); t!(header.set_path("foo")); t!(header.set_link_name("bar")); header.set_cksum(); t!(ar.append(&header, &[][..])); let mut header = tar::Header::new_gnu(); header.set_size(0); header.set_entry_type(tar::EntryType::Regular); t!(header.set_path("bar/foo")); header.set_cksum(); t!(ar.append(&header, &[][..])); let mut header = tar::Header::new_gnu(); header.set_size(0); header.set_entry_type(tar::EntryType::Regular); t!(header.set_path("foo/bar")); header.set_cksum(); t!(ar.append(&header, &[][..])); let bytes = t!(ar.into_inner()); let mut ar = tar::Archive::new(&bytes[..]); let td = t!(TempDir::new("tar")); t!(ar.unpack(td.path())); t!(File::open(td.path().join("bar/foo"))); t!(File::open(td.path().join("bar/bar"))); t!(File::open(td.path().join("foo/foo"))); t!(File::open(td.path().join("foo/bar"))); } #[test] fn parent_paths_error() { let mut ar = tar::Builder::new(Vec::new()); let mut header = tar::Header::new_gnu(); header.set_size(0); header.set_entry_type(tar::EntryType::Symlink); t!(header.set_path("foo")); t!(header.set_link_name("..")); header.set_cksum(); t!(ar.append(&header, &[][..])); let mut header = tar::Header::new_gnu(); header.set_size(0); header.set_entry_type(tar::EntryType::Regular); t!(header.set_path("foo/bar")); header.set_cksum(); t!(ar.append(&header, &[][..])); let bytes = t!(ar.into_inner()); let mut ar = tar::Archive::new(&bytes[..]); let td = t!(TempDir::new("tar")); assert!(ar.unpack(td.path()).is_err()); t!(td.path().join("foo").symlink_metadata()); assert!(File::open(td.path().join("foo").join("bar")).is_err()); } #[test] #[cfg(unix)] fn good_parent_paths_ok() { use std::path::PathBuf; let mut ar = tar::Builder::new(Vec::new()); let mut header = tar::Header::new_gnu(); header.set_size(0); header.set_entry_type(tar::EntryType::Symlink); t!(header.set_path(PathBuf::from("foo").join("bar"))); t!(header.set_link_name(PathBuf::from("..").join("bar"))); header.set_cksum(); t!(ar.append(&header, &[][..])); let mut header = tar::Header::new_gnu(); header.set_size(0); header.set_entry_type(tar::EntryType::Regular); t!(header.set_path("bar")); header.set_cksum(); t!(ar.append(&header, &[][..])); let bytes = t!(ar.into_inner()); let mut ar = tar::Archive::new(&bytes[..]); let td = t!(TempDir::new("tar")); t!(ar.unpack(td.path())); t!(td.path().join("foo").join("bar").read_link()); let dst = t!(td.path().join("foo").join("bar").canonicalize()); t!(File::open(dst)); } #[test] fn modify_hard_link_just_created() { let mut ar = tar::Builder::new(Vec::new()); let mut header = tar::Header::new_gnu(); header.set_size(0); header.set_entry_type(tar::EntryType::Link); t!(header.set_path("foo")); t!(header.set_link_name("../test")); header.set_cksum(); t!(ar.append(&header, &[][..])); let mut header = tar::Header::new_gnu(); header.set_size(1); header.set_entry_type(tar::EntryType::Regular); t!(header.set_path("foo")); header.set_cksum(); t!(ar.append(&header, &b"x"[..])); let bytes = t!(ar.into_inner()); let mut ar = tar::Archive::new(&bytes[..]); let td = t!(TempDir::new("tar")); let test = td.path().join("test"); t!(File::create(&test)); let dir = td.path().join("dir"); assert!(ar.unpack(&dir).is_err()); let mut contents = Vec::new(); t!(t!(File::open(&test)).read_to_end(&mut contents)); assert_eq!(contents.len(), 0); } #[test] fn modify_symlink_just_created() { let mut ar = tar::Builder::new(Vec::new()); let mut header = tar::Header::new_gnu(); header.set_size(0); header.set_entry_type(tar::EntryType::Symlink); t!(header.set_path("foo")); t!(header.set_link_name("../test")); header.set_cksum(); t!(ar.append(&header, &[][..])); let mut header = tar::Header::new_gnu(); header.set_size(1); header.set_entry_type(tar::EntryType::Regular); t!(header.set_path("foo")); header.set_cksum(); t!(ar.append(&header, &b"x"[..])); let bytes = t!(ar.into_inner()); let mut ar = tar::Archive::new(&bytes[..]); let td = t!(TempDir::new("tar")); let test = td.path().join("test"); t!(File::create(&test)); let dir = td.path().join("dir"); t!(ar.unpack(&dir)); let mut contents = Vec::new(); t!(t!(File::open(&test)).read_to_end(&mut contents)); assert_eq!(contents.len(), 0); } tar-0.4.26/tests/header/mod.rs010066400017500001750000000165331332645215500143510ustar0000000000000000use std::fs::{self, File}; use std::io::{self, Write}; use std::path::Path; use std::{iter, mem, thread, time}; use tempdir::TempDir; use tar::{GnuHeader, Header, HeaderMode}; #[test] fn default_gnu() { let mut h = Header::new_gnu(); assert!(h.as_gnu().is_some()); assert!(h.as_gnu_mut().is_some()); assert!(h.as_ustar().is_none()); assert!(h.as_ustar_mut().is_none()); } #[test] fn goto_old() { let mut h = Header::new_old(); assert!(h.as_gnu().is_none()); assert!(h.as_gnu_mut().is_none()); assert!(h.as_ustar().is_none()); assert!(h.as_ustar_mut().is_none()); } #[test] fn goto_ustar() { let mut h = Header::new_ustar(); assert!(h.as_gnu().is_none()); assert!(h.as_gnu_mut().is_none()); assert!(h.as_ustar().is_some()); assert!(h.as_ustar_mut().is_some()); } #[test] fn link_name() { let mut h = Header::new_gnu(); t!(h.set_link_name("foo")); assert_eq!(t!(h.link_name()).unwrap().to_str(), Some("foo")); t!(h.set_link_name("../foo")); assert_eq!(t!(h.link_name()).unwrap().to_str(), Some("../foo")); t!(h.set_link_name("foo/bar")); assert_eq!(t!(h.link_name()).unwrap().to_str(), Some("foo/bar")); t!(h.set_link_name("foo\\ba")); if cfg!(windows) { assert_eq!(t!(h.link_name()).unwrap().to_str(), Some("foo/ba")); } else { assert_eq!(t!(h.link_name()).unwrap().to_str(), Some("foo\\ba")); } let name = "foo\\bar\0"; for (slot, val) in h.as_old_mut().linkname.iter_mut().zip(name.as_bytes()) { *slot = *val; } assert_eq!(t!(h.link_name()).unwrap().to_str(), Some("foo\\bar")); assert!(h.set_link_name("\0").is_err()); } #[test] fn mtime() { let h = Header::new_gnu(); assert_eq!(t!(h.mtime()), 0); let h = Header::new_ustar(); assert_eq!(t!(h.mtime()), 0); let h = Header::new_old(); assert_eq!(t!(h.mtime()), 0); } #[test] fn user_and_group_name() { let mut h = Header::new_gnu(); t!(h.set_username("foo")); t!(h.set_groupname("bar")); assert_eq!(t!(h.username()), Some("foo")); assert_eq!(t!(h.groupname()), Some("bar")); h = Header::new_ustar(); t!(h.set_username("foo")); t!(h.set_groupname("bar")); assert_eq!(t!(h.username()), Some("foo")); assert_eq!(t!(h.groupname()), Some("bar")); h = Header::new_old(); assert_eq!(t!(h.username()), None); assert_eq!(t!(h.groupname()), None); assert!(h.set_username("foo").is_err()); assert!(h.set_groupname("foo").is_err()); } #[test] fn dev_major_minor() { let mut h = Header::new_gnu(); t!(h.set_device_major(1)); t!(h.set_device_minor(2)); assert_eq!(t!(h.device_major()), Some(1)); assert_eq!(t!(h.device_minor()), Some(2)); h = Header::new_ustar(); t!(h.set_device_major(1)); t!(h.set_device_minor(2)); assert_eq!(t!(h.device_major()), Some(1)); assert_eq!(t!(h.device_minor()), Some(2)); h.as_ustar_mut().unwrap().dev_minor[0] = 0x7f; h.as_ustar_mut().unwrap().dev_major[0] = 0x7f; assert!(h.device_major().is_err()); assert!(h.device_minor().is_err()); h.as_ustar_mut().unwrap().dev_minor[0] = b'g'; h.as_ustar_mut().unwrap().dev_major[0] = b'h'; assert!(h.device_major().is_err()); assert!(h.device_minor().is_err()); h = Header::new_old(); assert_eq!(t!(h.device_major()), None); assert_eq!(t!(h.device_minor()), None); assert!(h.set_device_major(1).is_err()); assert!(h.set_device_minor(1).is_err()); } #[test] fn set_path() { let mut h = Header::new_gnu(); t!(h.set_path("foo")); assert_eq!(t!(h.path()).to_str(), Some("foo")); t!(h.set_path("foo/")); assert_eq!(t!(h.path()).to_str(), Some("foo/")); t!(h.set_path("foo/bar")); assert_eq!(t!(h.path()).to_str(), Some("foo/bar")); t!(h.set_path("foo\\bar")); if cfg!(windows) { assert_eq!(t!(h.path()).to_str(), Some("foo/bar")); } else { assert_eq!(t!(h.path()).to_str(), Some("foo\\bar")); } let long_name = iter::repeat("foo").take(100).collect::(); let medium1 = iter::repeat("foo").take(52).collect::(); let medium2 = iter::repeat("fo/").take(52).collect::(); assert!(h.set_path(&long_name).is_err()); assert!(h.set_path(&medium1).is_err()); assert!(h.set_path(&medium2).is_err()); assert!(h.set_path("\0").is_err()); h = Header::new_ustar(); t!(h.set_path("foo")); assert_eq!(t!(h.path()).to_str(), Some("foo")); assert!(h.set_path(&long_name).is_err()); assert!(h.set_path(&medium1).is_err()); t!(h.set_path(&medium2)); assert_eq!(t!(h.path()).to_str(), Some(&medium2[..])); } #[test] fn set_ustar_path_hard() { let mut h = Header::new_ustar(); let p = Path::new("a").join(&vec!["a"; 100].join("")); t!(h.set_path(&p)); assert_eq!(t!(h.path()), p); } #[test] fn set_metadata_deterministic() { let td = t!(TempDir::new("tar-rs")); let tmppath = td.path().join("tmpfile"); fn mk_header(path: &Path, readonly: bool) -> Result { let mut file = t!(File::create(path)); t!(file.write_all(b"c")); let mut perms = t!(file.metadata()).permissions(); perms.set_readonly(readonly); t!(fs::set_permissions(path, perms)); let mut h = Header::new_ustar(); h.set_metadata_in_mode(&t!(path.metadata()), HeaderMode::Deterministic); Ok(h) } // Create "the same" File twice in a row, one second apart, with differing readonly values. let one = t!(mk_header(tmppath.as_path(), false)); thread::sleep(time::Duration::from_millis(1050)); let two = t!(mk_header(tmppath.as_path(), true)); // Always expected to match. assert_eq!(t!(one.size()), t!(two.size())); assert_eq!(t!(one.path()), t!(two.path())); assert_eq!(t!(one.mode()), t!(two.mode())); // Would not match without `Deterministic`. assert_eq!(t!(one.mtime()), t!(two.mtime())); // TODO: No great way to validate that these would not be filled, but // check them anyway. assert_eq!(t!(one.uid()), t!(two.uid())); assert_eq!(t!(one.gid()), t!(two.gid())); } #[test] fn extended_numeric_format() { let mut h: GnuHeader = unsafe { mem::zeroed() }; h.as_header_mut().set_size(42); assert_eq!(h.size, [48, 48, 48, 48, 48, 48, 48, 48, 48, 53, 50, 0]); h.as_header_mut().set_size(8589934593); assert_eq!(h.size, [0x80, 0, 0, 0, 0, 0, 0, 0x02, 0, 0, 0, 1]); h.size = [0x80, 0, 0, 0, 0, 0, 0, 0x02, 0, 0, 0, 0]; assert_eq!(h.as_header().entry_size().unwrap(), 0x0200000000); h.size = [48, 48, 48, 48, 48, 48, 48, 48, 48, 53, 51, 0]; assert_eq!(h.as_header().entry_size().unwrap(), 43); h.as_header_mut().set_gid(42); assert_eq!(h.gid, [48, 48, 48, 48, 48, 53, 50, 0]); assert_eq!(h.as_header().gid().unwrap(), 42); h.as_header_mut().set_gid(0x7fffffffffffffff); assert_eq!(h.gid, [0xff; 8]); assert_eq!(h.as_header().gid().unwrap(), 0x7fffffffffffffff); h.uid = [0x80, 0x00, 0x00, 0x00, 0x12, 0x34, 0x56, 0x78]; assert_eq!(h.as_header().uid().unwrap(), 0x12345678); h.mtime = [ 0x80, 0, 0, 0, 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, ]; assert_eq!(h.as_header().mtime().unwrap(), 0x0123456789abcdef); } #[test] fn byte_slice_conversion() { let h = Header::new_gnu(); let b: &[u8] = h.as_bytes(); let b_conv: &[u8] = Header::from_byte_slice(h.as_bytes()).as_bytes(); assert_eq!(b, b_conv); } tar-0.4.26/.cargo_vcs_info.json0000644000000001120000000000000117440ustar00{ "git": { "sha1": "e9ac1f6ad3afac7b96302b52c489885fa74e39e0" } }