xattr-1.3.1/.cargo_vcs_info.json0000644000000001360000000000100122000ustar { "git": { "sha1": "16ceafd4c00c84fc0fb92d4a355f8fe57c102652" }, "path_in_vcs": "" }xattr-1.3.1/.github/workflows/android.yml000064400000000000000000000005561046102023000165360ustar 00000000000000on: push: branches: - master pull_request: branches: - master name: android jobs: build: runs-on: ubuntu-latest timeout-minutes: 30 steps: - uses: actions/checkout@v4 - uses: dtolnay/rust-toolchain@stable with: targets: x86_64-linux-android - run: cargo build --verbose --target x86_64-linux-android xattr-1.3.1/.github/workflows/freebsd.yml000064400000000000000000000016541046102023000165300ustar 00000000000000# Run cargo tests in a FreeBSD VM. This needs to run on one of the GitHub macos runners, because # they are currently the only ones to support virtualization. # # See https://github.com/vmactions/freebsd-vm on: push: branches: - master pull_request: branches: - master name: freebsd jobs: test: runs-on: ubuntu-22.04 steps: - uses: actions/checkout@v4 - name: Run tests in FreeBSD VM uses: vmactions/freebsd-vm@v1 with: usesh: true prepare: | pkg install -y curl curl https://sh.rustup.rs -sSf --output rustup.sh sh rustup.sh -y --profile minimal --default-toolchain stable export PATH="${HOME}/.cargo/bin:$PATH" echo "~~~~ rustc --version ~~~~" rustc --version run: | export PATH="${HOME}/.cargo/bin:$PATH" ls -la cargo build --verbose cargo test --verbose xattr-1.3.1/.github/workflows/linux.yml000064400000000000000000000004741046102023000162540ustar 00000000000000on: push: branches: - master pull_request: branches: - master name: linux jobs: build: runs-on: ubuntu-latest timeout-minutes: 30 steps: - uses: actions/checkout@v4 - uses: dtolnay/rust-toolchain@stable - run: cargo build --verbose - run: cargo test --verbose xattr-1.3.1/.github/workflows/macos.yml000064400000000000000000000004731046102023000162160ustar 00000000000000on: push: branches: - master pull_request: branches: - master name: macos jobs: build: runs-on: macos-latest timeout-minutes: 30 steps: - uses: actions/checkout@v4 - uses: dtolnay/rust-toolchain@stable - run: cargo build --verbose - run: cargo test --verbose xattr-1.3.1/.github/workflows/netbsd.yml000064400000000000000000000022711046102023000163710ustar 00000000000000# Run cargo tests in a NetBSD VM. This needs to run on one of the GitHub macos runners, because # they are currently the only ones to support virtualization. # # See https://github.com/vmactions/netbsd-vm # # The standard filesystem on NetBSD installs, ffs, doesn't support extended attributes. The # filesystem type needs to be set fo FFSv2ea (on NetBSD 10 or later) for this to be enabled. # See http://wikimirror.netbsd.de/tutorials/acls_and_extended_attributes_on_ffs/ # Disabled until NetBSD 10 is released and available via vmactions on: workflow_dispatch name: netbsd jobs: test: runs-on: ubuntu-22.04 steps: - uses: actions/checkout@v4 - name: Run tests in NetBSD VM uses: vmactions/netbsd-vm@v1 with: usesh: true prepare: | /usr/sbin/pkg_add curl curl https://sh.rustup.rs -sSf --output rustup.sh sh rustup.sh -y --profile minimal --default-toolchain stable export PATH="${HOME}/.cargo/bin:$PATH" echo "~~~~ rustc --version ~~~~" rustc --version run: | export PATH="${HOME}/.cargo/bin:$PATH" ls -la cargo build --verbose cargo test --verbose xattr-1.3.1/.github/workflows/unsupported.yml000064400000000000000000000005661046102023000175070ustar 00000000000000on: push: branches: - master pull_request: branches: - master name: unsupported jobs: build: runs-on: ubuntu-latest timeout-minutes: 30 steps: - uses: actions/checkout@v4 - uses: dtolnay/rust-toolchain@stable with: targets: x86_64-unknown-illumos - run: cargo build --verbose --target x86_64-unknown-illumos xattr-1.3.1/.gitignore000064400000000000000000000000221046102023000127520ustar 00000000000000target Cargo.lock xattr-1.3.1/Cargo.toml0000644000000025130000000000100101770ustar # 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 are reading this file be aware that the original Cargo.toml # will likely look very different (and much more reasonable). # See Cargo.toml.orig for the original contents. [package] edition = "2021" name = "xattr" version = "1.3.1" authors = ["Steven Allen "] description = "unix extended filesystem attributes" documentation = "https://docs.rs/xattr" readme = "README.md" keywords = [ "xattr", "filesystem", "unix", ] license = "MIT/Apache-2.0" repository = "https://github.com/Stebalien/xattr" [dependencies.rustix] version = "0.38.29" features = [ "fs", "std", ] default-features = false [dev-dependencies.rustix] version = "0.38.28" features = ["net"] default-features = false [dev-dependencies.tempfile] version = "3" [features] default = ["unsupported"] unsupported = [] [target."cfg(any(target_os = \"freebsd\", target_os = \"netbsd\"))".dependencies.libc] version = "0.2.150" [target."cfg(target_os = \"linux\")".dependencies.linux-raw-sys] version = "0.4.11" features = ["std"] default-features = false xattr-1.3.1/Cargo.toml.orig000064400000000000000000000022431046102023000136600ustar 00000000000000[package] name = "xattr" edition = "2021" version = "1.3.1" authors = ["Steven Allen "] description = "unix extended filesystem attributes" documentation = "https://docs.rs/xattr" repository = "https://github.com/Stebalien/xattr" keywords = ["xattr", "filesystem", "unix"] license = "MIT/Apache-2.0" [features] default = ["unsupported"] # Adds a dummy implementation for unsupported platforms. This is useful when # developing platform-independent code that doesn't absolutely need xattr # support. # # You can disable this feature if you want compilation to fail on unsupported # platforms. This would make sense if you absolutely need xattr support. unsupported = [] [dependencies.rustix] version = "0.38.29" default-features = false features = ["fs", "std"] # Enable the `std` feature here so that `std::os::raw` is used. [target.'cfg(target_os = "linux")'.dependencies.linux-raw-sys] version = "0.4.11" default-features = false features = ["std"] [target.'cfg(any(target_os = "freebsd", target_os = "netbsd"))'.dependencies] libc = "0.2.150" [dev-dependencies] rustix = { version = "0.38.28", default-features = false, features = ["net"] } tempfile = "3" xattr-1.3.1/LICENSE-APACHE000064400000000000000000000251371046102023000127240ustar 00000000000000 Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. 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While redistributing the Work or Derivative Works thereof, You may choose to offer, and charge a fee for, acceptance of support, warranty, indemnity, or other liability obligations and/or rights consistent with this License. However, in accepting such obligations, You may act only on Your own behalf and on Your sole responsibility, not on behalf of any other Contributor, and only if You agree to indemnify, defend, and hold each Contributor harmless for any liability incurred by, or claims asserted against, such Contributor by reason of your accepting any such warranty or additional liability. END OF TERMS AND CONDITIONS APPENDIX: How to apply the Apache License to your work. To apply the Apache License to your work, attach the following boilerplate notice, with the fields enclosed by brackets "[]" replaced with your own identifying information. (Don't include the brackets!) The text should be enclosed in the appropriate comment syntax for the file format. We also recommend that a file or class name and description of purpose be included on the same "printed page" as the copyright notice for easier identification within third-party archives. Copyright [yyyy] [name of copyright owner] Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. xattr-1.3.1/LICENSE-MIT000064400000000000000000000020401046102023000124200ustar 00000000000000Copyright (c) 2015 Steven Allen 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. xattr-1.3.1/README.md000064400000000000000000000012641046102023000122520ustar 00000000000000xattr ===== A small library for setting, getting, and listing extended attributes. Supported Platforms: Android, Linux, MacOS, FreeBSD, and NetBSD. API Documentation: https://docs.rs/xattr/latest/xattr/ Unsupported Platforms -------------------------- This library includes no-op support for unsupported Unix platforms. That is, it will build on *all* Unix platforms but always fail on unsupported Unix platforms. 1. You can turn this off by disabling the default `unsupported` feature. If you do so, this library will fail to compile on unsupported platforms. 2. Alternatively, you can detect unsupported platforms at runtime by checking the `xattr::SUPPORTED_PLATFORM` boolean. xattr-1.3.1/src/error.rs000064400000000000000000000015671046102023000132670ustar 00000000000000use std::error::Error; use std::fmt; /// The error type returned on unsupported platforms. /// /// On unsupported platforms, all operations will fail with an `io::Error` with /// a kind `io::ErrorKind::Unsupported` and an `UnsupportedPlatformError` error as the inner error. /// While you *could* check the inner error, it's probably simpler just to check /// `xattr::SUPPORTED_PLATFORM`. /// /// This error mostly exists for pretty error messages. #[derive(Copy, Clone, Debug)] pub struct UnsupportedPlatformError; impl Error for UnsupportedPlatformError { fn description(&self) -> &str { "unsupported platform" } } impl fmt::Display for UnsupportedPlatformError { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { write!( f, "unsupported platform, please file a bug at `https://github.com/Stebalien/xattr'" ) } } xattr-1.3.1/src/lib.rs000064400000000000000000000107761046102023000127060ustar 00000000000000#![allow(clippy::comparison_chain)] //! A pure-Rust library to manage extended attributes. //! //! It provides support for manipulating extended attributes //! (`xattrs`) on modern Unix filesystems. See the `attr(5)` //! manpage for more details. //! //! An extension trait [`FileExt`] is provided to directly work with //! standard `File` objects and file descriptors. //! //! If the path argument is a symlink, the get/set/list/remove functions //! operate on the symlink itself. To operate on the symlink target, use //! the _deref variant of these functions. //! //! ```rust //! let mut xattrs = xattr::list("/").unwrap().peekable(); //! //! if xattrs.peek().is_none() { //! println!("no xattr set on root"); //! return; //! } //! //! println!("Extended attributes:"); //! for attr in xattrs { //! println!(" - {:?}", attr); //! } //! ``` mod error; mod sys; mod util; use std::ffi::OsStr; use std::fs::File; use std::io; use std::os::unix::io::{AsRawFd, BorrowedFd}; use std::path::Path; pub use error::UnsupportedPlatformError; pub use sys::{XAttrs, SUPPORTED_PLATFORM}; /// Get an extended attribute for the specified file. pub fn get(path: P, name: N) -> io::Result>> where P: AsRef, N: AsRef, { util::extract_noattr(sys::get_path(path.as_ref(), name.as_ref(), false)) } /// Get an extended attribute for the specified file (dereference symlinks). pub fn get_deref(path: P, name: N) -> io::Result>> where P: AsRef, N: AsRef, { util::extract_noattr(sys::get_path(path.as_ref(), name.as_ref(), true)) } /// Set an extended attribute on the specified file. pub fn set(path: P, name: N, value: &[u8]) -> io::Result<()> where P: AsRef, N: AsRef, { sys::set_path(path.as_ref(), name.as_ref(), value, false) } /// Set an extended attribute on the specified file (dereference symlinks). pub fn set_deref(path: P, name: N, value: &[u8]) -> io::Result<()> where P: AsRef, N: AsRef, { sys::set_path(path.as_ref(), name.as_ref(), value, true) } /// Remove an extended attribute from the specified file. pub fn remove(path: P, name: N) -> io::Result<()> where P: AsRef, N: AsRef, { sys::remove_path(path.as_ref(), name.as_ref(), false) } /// Remove an extended attribute from the specified file (dereference symlinks). pub fn remove_deref(path: P, name: N) -> io::Result<()> where P: AsRef, N: AsRef, { sys::remove_path(path.as_ref(), name.as_ref(), true) } /// List extended attributes attached to the specified file. /// /// Note: this may not list *all* attributes. Speficially, it definitely won't list any trusted /// attributes unless you are root and it may not list system attributes. pub fn list

(path: P) -> io::Result where P: AsRef, { sys::list_path(path.as_ref(), false) } /// List extended attributes attached to the specified file (dereference symlinks). pub fn list_deref

(path: P) -> io::Result where P: AsRef, { sys::list_path(path.as_ref(), true) } /// Extension trait to manipulate extended attributes on `File`-like objects. pub trait FileExt: AsRawFd { /// Get an extended attribute for the specified file. fn get_xattr(&self, name: N) -> io::Result>> where N: AsRef, { // SAFETY: Implement I/O safety later. let fd = unsafe { BorrowedFd::borrow_raw(self.as_raw_fd()) }; util::extract_noattr(sys::get_fd(fd, name.as_ref())) } /// Set an extended attribute on the specified file. fn set_xattr(&self, name: N, value: &[u8]) -> io::Result<()> where N: AsRef, { let fd = unsafe { BorrowedFd::borrow_raw(self.as_raw_fd()) }; sys::set_fd(fd, name.as_ref(), value) } /// Remove an extended attribute from the specified file. fn remove_xattr(&self, name: N) -> io::Result<()> where N: AsRef, { let fd = unsafe { BorrowedFd::borrow_raw(self.as_raw_fd()) }; sys::remove_fd(fd, name.as_ref()) } /// List extended attributes attached to the specified file. /// /// Note: this may not list *all* attributes. Speficially, it definitely won't list any trusted /// attributes unless you are root and it may not list system attributes. fn list_xattr(&self) -> io::Result { let fd = unsafe { BorrowedFd::borrow_raw(self.as_raw_fd()) }; sys::list_fd(fd) } } impl FileExt for File {} xattr-1.3.1/src/sys/bsd.rs000064400000000000000000000242101046102023000135120ustar 00000000000000//! FreeBSD and NetBSD xattr support. use std::ffi::{CString, OsStr, OsString}; use std::io; use std::mem; use std::os::unix::ffi::{OsStrExt, OsStringExt}; use std::os::unix::io::{BorrowedFd, AsRawFd}; use std::path::Path; use std::ptr; use libc::{c_int, c_void, size_t, EPERM}; use libc::{ extattr_delete_fd, extattr_delete_link, extattr_delete_file, extattr_get_fd, extattr_get_link, extattr_get_file, extattr_list_fd, extattr_list_link, extattr_list_file, extattr_set_fd, extattr_set_link, extattr_set_file, EXTATTR_NAMESPACE_SYSTEM, EXTATTR_NAMESPACE_USER, }; use crate::util::allocate_loop; pub const ENOATTR: i32 = libc::ENOATTR; const EXTATTR_NAMESPACE_USER_STRING: &str = "user"; const EXTATTR_NAMESPACE_SYSTEM_STRING: &str = "system"; const EXTATTR_NAMESPACE_NAMES: [&str; 3] = [ "empty", EXTATTR_NAMESPACE_USER_STRING, EXTATTR_NAMESPACE_SYSTEM_STRING, ]; fn path_to_c(path: &Path) -> io::Result { match CString::new(path.as_os_str().as_bytes()) { Ok(name) => Ok(name), Err(_) => Err(io::Error::new(io::ErrorKind::NotFound, "file not found")), } } #[inline] fn slice_parts(buf: &mut [u8]) -> (*mut c_void, size_t) { if buf.is_empty() { (ptr::null_mut(), 0) } else { ( buf.as_mut_ptr().cast(), buf.len() as size_t ) } } /// An iterator over a set of extended attributes names. pub struct XAttrs { user_attrs: Box<[u8]>, system_attrs: Box<[u8]>, offset: usize, } impl Clone for XAttrs { fn clone(&self) -> Self { XAttrs { user_attrs: Vec::from(&*self.user_attrs).into_boxed_slice(), system_attrs: Vec::from(&*self.system_attrs).into_boxed_slice(), offset: self.offset, } } fn clone_from(&mut self, other: &XAttrs) { self.offset = other.offset; let mut data = mem::replace(&mut self.user_attrs, Box::new([])).into_vec(); data.extend(other.user_attrs.iter().cloned()); self.user_attrs = data.into_boxed_slice(); data = mem::replace(&mut self.system_attrs, Box::new([])).into_vec(); data.extend(other.system_attrs.iter().cloned()); self.system_attrs = data.into_boxed_slice(); } } impl Iterator for XAttrs { type Item = OsString; fn next(&mut self) -> Option { if self.user_attrs.is_empty() && self.system_attrs.is_empty() { return None; } if self.offset == self.user_attrs.len() + self.system_attrs.len() { return None; } let data = if self.offset < self.system_attrs.len() { &self.system_attrs[self.offset..] } else { &self.user_attrs[self.offset - self.system_attrs.len()..] }; let siz = data[0] as usize; self.offset += siz + 1; if self.offset < self.system_attrs.len() { Some(prefix_namespace( OsStr::from_bytes(&data[1..siz + 1]), EXTATTR_NAMESPACE_SYSTEM, )) } else { Some(prefix_namespace( OsStr::from_bytes(&data[1..siz + 1]), EXTATTR_NAMESPACE_USER, )) } } fn size_hint(&self) -> (usize, Option) { if self.user_attrs.len() + self.system_attrs.len() == self.offset { (0, Some(0)) } else { (1, None) } } } // This could use libc::extattr_string_to_namespace, but it's awkward because // that requires nul-terminated strings, which Rust's std is loathe to provide. fn name_to_ns(name: &OsStr) -> io::Result<(c_int, CString)> { let mut groups = name.as_bytes().splitn(2, |&b| b == b'.').take(2); let nsname = match groups.next() { Some(s) => s, None => { return Err(io::Error::new( io::ErrorKind::InvalidInput, "couldn't find namespace", )) } }; let propname = match groups.next() { Some(s) => s, None => { return Err(io::Error::new( io::ErrorKind::InvalidInput, "couldn't find attribute", )) } }; let ns_int = match EXTATTR_NAMESPACE_NAMES .iter() .position(|&s| s.as_bytes() == nsname) { Some(i) => i, None => { return Err(io::Error::new( io::ErrorKind::InvalidInput, "no matching namespace", )) } }; Ok((ns_int as c_int, CString::new(propname)?)) } fn prefix_namespace(attr: &OsStr, ns: c_int) -> OsString { let nsname = EXTATTR_NAMESPACE_NAMES[ns as usize]; let mut v = Vec::with_capacity(nsname.as_bytes().len() + attr.as_bytes().len() + 1); v.extend(nsname.as_bytes()); v.extend(".".as_bytes()); v.extend(attr.as_bytes()); OsString::from_vec(v) } fn cvt(res: libc::ssize_t) -> io::Result { if res < 0 { Err(io::Error::last_os_error()) } else { Ok(res as usize) } } pub fn get_fd(fd: BorrowedFd<'_>, name: &OsStr) -> io::Result> { let (ns, name) = name_to_ns(name)?; unsafe { allocate_loop(|buf| { let (ptr, len) = slice_parts(buf); cvt(extattr_get_fd(fd.as_raw_fd(), ns, name.as_ptr(), ptr, len)) }) } } pub fn set_fd(fd: BorrowedFd<'_>, name: &OsStr, value: &[u8]) -> io::Result<()> { let (ns, name) = name_to_ns(name)?; let ret = unsafe { extattr_set_fd( fd.as_raw_fd(), ns, name.as_ptr(), value.as_ptr() as *const c_void, value.len() as size_t, ) }; if ret == -1 { Err(io::Error::last_os_error()) } else { Ok(()) } } pub fn remove_fd(fd: BorrowedFd<'_>, name: &OsStr) -> io::Result<()> { let (ns, name) = name_to_ns(name)?; let ret = unsafe { extattr_delete_fd(fd.as_raw_fd(), ns, name.as_ptr()) }; if ret != 0 { Err(io::Error::last_os_error()) } else { Ok(()) } } pub fn list_fd(fd: BorrowedFd<'_>) -> io::Result { let sysvec = unsafe { let res = allocate_loop(|buf| { let (ptr, len) = slice_parts(buf); cvt(extattr_list_fd( fd.as_raw_fd(), EXTATTR_NAMESPACE_SYSTEM, ptr, len )) }); // On FreeBSD, system attributes require root privileges to view. However, // to mimic the behavior of listxattr in linux and osx, we need to query // them anyway and return empty results if we get EPERM match res { Ok(v) => v, Err(err) => { if err.raw_os_error() == Some(EPERM) { Vec::new() } else { return Err(err); } } } }; let uservec = unsafe { let res = allocate_loop(|buf| { let (ptr, len) = slice_parts(buf); cvt(extattr_list_fd( fd.as_raw_fd(), EXTATTR_NAMESPACE_USER, ptr, len )) }); match res { Ok(v) => v, Err(err) => return Err(err), } }; Ok(XAttrs { system_attrs: sysvec.into_boxed_slice(), user_attrs: uservec.into_boxed_slice(), offset: 0, }) } pub fn get_path(path: &Path, name: &OsStr, deref: bool) -> io::Result> { let (ns, name) = name_to_ns(name)?; let path = path_to_c(path)?; let extattr_get_func = if deref { extattr_get_file } else { extattr_get_link }; unsafe { allocate_loop(|buf| { let (ptr, len) = slice_parts(buf); cvt(extattr_get_func( path.as_ptr(), ns, name.as_ptr(), ptr, len )) }) } } pub fn set_path(path: &Path, name: &OsStr, value: &[u8], deref: bool) -> io::Result<()> { let (ns, name) = name_to_ns(name)?; let path = path_to_c(path)?; let extattr_set_func = if deref { extattr_set_file } else { extattr_set_link }; let ret = unsafe { extattr_set_func( path.as_ptr(), ns, name.as_ptr(), value.as_ptr() as *const c_void, value.len() as size_t, ) }; if ret == -1 { Err(io::Error::last_os_error()) } else { Ok(()) } } pub fn remove_path(path: &Path, name: &OsStr, deref: bool) -> io::Result<()> { let (ns, name) = name_to_ns(name)?; let path = path_to_c(path)?; let extattr_delete_func = if deref { extattr_delete_file } else { extattr_delete_link }; let ret = unsafe { extattr_delete_func(path.as_ptr(), ns, name.as_ptr()) }; if ret != 0 { Err(io::Error::last_os_error()) } else { Ok(()) } } pub fn list_path(path: &Path, deref: bool) -> io::Result { let path = path_to_c(path)?; let extattr_list_func = if deref { extattr_list_file } else { extattr_list_link }; let sysvec = unsafe { let res = allocate_loop(|buf| { let (ptr, len) = slice_parts(buf); cvt(extattr_list_func( path.as_ptr(), EXTATTR_NAMESPACE_SYSTEM, ptr, len )) }); // On FreeBSD, system attributes require root privileges to view. However, // to mimic the behavior of listxattr in linux and osx, we need to query // them anyway and return empty results if we get EPERM match res { Ok(v) => v, Err(err) => { if err.raw_os_error() == Some(EPERM) { Vec::new() } else { return Err(err); } } } }; let uservec = unsafe { let res = allocate_loop(|buf| { let (ptr, len) = slice_parts(buf); cvt(extattr_list_func( path.as_ptr(), EXTATTR_NAMESPACE_USER, ptr, len )) }); match res { Ok(v) => v, Err(err) => return Err(err), } }; Ok(XAttrs { system_attrs: sysvec.into_boxed_slice(), user_attrs: uservec.into_boxed_slice(), offset: 0, }) } xattr-1.3.1/src/sys/linux_macos.rs000064400000000000000000000076001046102023000152670ustar 00000000000000use std::ffi::{OsStr, OsString}; use std::io; use std::mem; use std::os::unix::ffi::OsStrExt; use std::os::unix::io::BorrowedFd; use std::path::Path; use rustix::fs as rfs; use rustix::path::Arg; use crate::util::allocate_loop; use std::os::raw::c_char; #[cfg(not(target_os = "macos"))] pub const ENOATTR: i32 = rustix::io::Errno::NODATA.raw_os_error(); #[cfg(target_os = "macos")] pub const ENOATTR: i32 = rustix::io::Errno::NOATTR.raw_os_error(); // Convert an `&mut [u8]` to an `&mut [c_char]` #[inline] fn as_listxattr_buffer(buf: &mut [u8]) -> &mut [c_char] { // SAFETY: u8 and i8 have the same size and alignment unsafe { &mut *(buf as *mut [u8] as *mut [c_char]) } } /// An iterator over a set of extended attributes names. pub struct XAttrs { data: Box<[u8]>, offset: usize, } impl Clone for XAttrs { fn clone(&self) -> Self { XAttrs { data: Vec::from(&*self.data).into_boxed_slice(), offset: self.offset, } } fn clone_from(&mut self, other: &XAttrs) { self.offset = other.offset; let mut data = mem::replace(&mut self.data, Box::new([])).into_vec(); data.extend(other.data.iter().cloned()); self.data = data.into_boxed_slice(); } } // Yes, I could avoid these allocations on linux/macos. However, if we ever want to be freebsd // compatible, we need to be able to prepend the namespace to the extended attribute names. // Furthermore, borrowing makes the API messy. impl Iterator for XAttrs { type Item = OsString; fn next(&mut self) -> Option { let data = &self.data[self.offset..]; if data.is_empty() { None } else { // always null terminated (unless empty). let end = data.iter().position(|&b| b == 0u8).unwrap(); self.offset += end + 1; Some(OsStr::from_bytes(&data[..end]).to_owned()) } } fn size_hint(&self) -> (usize, Option) { if self.data.len() == self.offset { (0, Some(0)) } else { (1, None) } } } pub fn get_fd(fd: BorrowedFd<'_>, name: &OsStr) -> io::Result> { allocate_loop(|buf| { rfs::fgetxattr(fd, name, buf) }) } pub fn set_fd(fd: BorrowedFd<'_>, name: &OsStr, value: &[u8]) -> io::Result<()> { rfs::fsetxattr(fd, name, value, rfs::XattrFlags::empty())?; Ok(()) } pub fn remove_fd(fd: BorrowedFd<'_>, name: &OsStr) -> io::Result<()> { rfs::fremovexattr(fd, name)?; Ok(()) } pub fn list_fd(fd: BorrowedFd<'_>) -> io::Result { let vec = allocate_loop(|buf| { rfs::flistxattr(fd, as_listxattr_buffer(buf)) })?; Ok(XAttrs { data: vec.into_boxed_slice(), offset: 0, }) } pub fn get_path(path: &Path, name: &OsStr, deref: bool) -> io::Result> { let path = path.into_c_str()?; let name = name.into_c_str()?; allocate_loop(|buf| { let getxattr_func = if deref { rfs::getxattr } else { rfs::lgetxattr }; let size = getxattr_func(&*path, &*name, buf)?; io::Result::Ok(size) }) } pub fn set_path(path: &Path, name: &OsStr, value: &[u8], deref: bool) -> io::Result<()> { let setxattr_func = if deref { rfs::setxattr } else { rfs::lsetxattr }; setxattr_func(path, name, value, rfs::XattrFlags::empty())?; Ok(()) } pub fn remove_path(path: &Path, name: &OsStr, deref: bool) -> io::Result<()> { let removexattr_func = if deref { rfs::removexattr } else { rfs::lremovexattr }; removexattr_func(path, name)?; Ok(()) } pub fn list_path(path: &Path, deref: bool) -> io::Result { let listxattr_func = if deref { rfs::listxattr } else { rfs::llistxattr }; let path = path.as_cow_c_str()?; let vec = allocate_loop(|buf| { listxattr_func(&*path, as_listxattr_buffer(buf)) })?; Ok(XAttrs { data: vec.into_boxed_slice(), offset: 0, }) } xattr-1.3.1/src/sys/mod.rs000064400000000000000000000024111046102023000135200ustar 00000000000000macro_rules! platforms { ($($($platform:expr);* => $module:ident),*) => { $( #[cfg(any($(target_os = $platform),*))] #[cfg_attr(not(any($(target_os = $platform),*)), allow(dead_code))] mod $module; #[cfg(any($(target_os = $platform),*))] pub use self::$module::*; )* #[cfg(all(feature = "unsupported", not(any($($(target_os = $platform),*),*))))] #[cfg_attr(any($($(target_os = $platform),*),*), allow(dead_code))] mod unsupported; #[cfg(all(feature = "unsupported", not(any($($(target_os = $platform),*),*))))] pub use self::unsupported::*; /// A constant indicating whether or not the target platform is supported. /// /// To make programmer's lives easier, this library builds on all platforms. /// However, all function calls on unsupported platforms will return /// `io::Error`s. /// /// Note: If you would like compilation to simply fail on unsupported platforms, /// turn of the `unsupported` feature. pub const SUPPORTED_PLATFORM: bool = cfg!(any($($(target_os = $platform),*),*)); } } platforms! { "android"; "linux"; "macos" => linux_macos, "freebsd"; "netbsd" => bsd } xattr-1.3.1/src/sys/unsupported.rs000064400000000000000000000035641046102023000153430ustar 00000000000000use std::ffi::{OsStr, OsString}; use std::io; use std::os::unix::io::BorrowedFd; use std::path::Path; use crate::UnsupportedPlatformError; pub const ENOATTR: i32 = 0; /// An iterator over a set of extended attributes names. #[derive(Clone, Debug)] pub struct XAttrs; impl Iterator for XAttrs { type Item = OsString; fn next(&mut self) -> Option { unreachable!("this should never exist") } fn size_hint(&self) -> (usize, Option) { unreachable!("this should never exist") } } pub fn get_fd(_: BorrowedFd<'_>, _: &OsStr) -> io::Result> { Err(io::Error::new( io::ErrorKind::Unsupported, UnsupportedPlatformError, )) } pub fn set_fd(_: BorrowedFd<'_>, _: &OsStr, _: &[u8]) -> io::Result<()> { Err(io::Error::new( io::ErrorKind::Unsupported, UnsupportedPlatformError, )) } pub fn remove_fd(_: BorrowedFd<'_>, _: &OsStr) -> io::Result<()> { Err(io::Error::new( io::ErrorKind::Unsupported, UnsupportedPlatformError, )) } pub fn list_fd(_: BorrowedFd<'_>) -> io::Result { Err(io::Error::new( io::ErrorKind::Unsupported, UnsupportedPlatformError, )) } pub fn get_path(_: &Path, _: &OsStr, _: bool) -> io::Result> { Err(io::Error::new( io::ErrorKind::Unsupported, UnsupportedPlatformError, )) } pub fn set_path(_: &Path, _: &OsStr, _: &[u8], _: bool) -> io::Result<()> { Err(io::Error::new( io::ErrorKind::Unsupported, UnsupportedPlatformError, )) } pub fn remove_path(_: &Path, _: &OsStr, _: bool) -> io::Result<()> { Err(io::Error::new( io::ErrorKind::Unsupported, UnsupportedPlatformError, )) } pub fn list_path(_: &Path, _: bool) -> io::Result { Err(io::Error::new( io::ErrorKind::Unsupported, UnsupportedPlatformError, )) } xattr-1.3.1/src/util.rs000064400000000000000000000020161046102023000131010ustar 00000000000000use std::io; pub fn extract_noattr(result: io::Result>) -> io::Result>> { result.map(Some).or_else(|e| { if e.raw_os_error() == Some(crate::sys::ENOATTR) { Ok(None) } else { Err(e) } }) } #[allow(dead_code)] pub fn allocate_loop Result>(mut f: F) -> io::Result> where io::Error: From, { const ERANGE: i32 = rustix::io::Errno::RANGE.raw_os_error(); let mut vec: Vec = Vec::new(); loop { let ret = f(&mut [])?; vec.resize(ret, 0); match f(&mut vec) { Ok(size) => { vec.truncate(size); vec.shrink_to_fit(); return Ok(vec); } Err(e) => { let err: io::Error = e.into(); if err.raw_os_error() == Some(ERANGE) { continue; } else { return Err(err); } } } } } xattr-1.3.1/tests/main.rs000064400000000000000000000061641046102023000134330ustar 00000000000000use std::collections::BTreeSet; use std::ffi::OsStr; use xattr::FileExt; use tempfile::{tempfile_in, NamedTempFile}; #[test] #[cfg(any(target_os = "linux", target_os = "freebsd", target_os = "macos"))] fn test_fd() { use std::os::unix::ffi::OsStrExt; // Only works on "real" filesystems. let tmp = tempfile_in("/var/tmp").unwrap(); assert!(tmp.get_xattr("user.test").unwrap().is_none()); assert_eq!( tmp.list_xattr() .unwrap() .filter(|x| x.as_bytes().starts_with(b"user.")) .count(), 0 ); tmp.set_xattr("user.test", b"my test").unwrap(); assert_eq!(tmp.get_xattr("user.test").unwrap().unwrap(), b"my test"); assert_eq!( tmp.list_xattr() .unwrap() .filter(|x| x.as_bytes().starts_with(b"user.")) .collect::>(), vec![OsStr::new("user.test")] ); tmp.remove_xattr("user.test").unwrap(); assert!(tmp.get_xattr("user.test").unwrap().is_none()); assert_eq!( tmp.list_xattr() .unwrap() .filter(|x| x.as_bytes().starts_with(b"user.")) .count(), 0 ); } #[test] #[cfg(any(target_os = "linux", target_os = "freebsd", target_os = "macos"))] fn test_path() { use std::os::unix::ffi::OsStrExt; // Only works on "real" filesystems. let tmp = NamedTempFile::new_in("/var/tmp").unwrap(); assert!(xattr::get(tmp.path(), "user.test").unwrap().is_none()); assert_eq!( xattr::list(tmp.path()) .unwrap() .filter(|x| x.as_bytes().starts_with(b"user.")) .count(), 0 ); xattr::set(tmp.path(), "user.test", b"my test").unwrap(); assert_eq!( xattr::get(tmp.path(), "user.test").unwrap().unwrap(), b"my test" ); assert_eq!( xattr::list(tmp.path()) .unwrap() .filter(|x| x.as_bytes().starts_with(b"user.")) .collect::>(), vec![OsStr::new("user.test")] ); xattr::remove(tmp.path(), "user.test").unwrap(); assert!(xattr::get(tmp.path(), "user.test").unwrap().is_none()); assert_eq!( xattr::list(tmp.path()) .unwrap() .filter(|x| x.as_bytes().starts_with(b"user.")) .count(), 0 ); } #[test] #[cfg(any(target_os = "linux", target_os = "freebsd", target_os = "macos"))] fn test_missing() { assert!(xattr::get("/var/empty/does-not-exist", "user.test").is_err()); } #[test] #[cfg(any(target_os = "linux", target_os = "freebsd", target_os = "macos"))] fn test_multi() { use std::os::unix::ffi::OsStrExt; // Only works on "real" filesystems. let tmp = tempfile_in("/var/tmp").unwrap(); let mut items: BTreeSet<_> = [ OsStr::new("user.test1"), OsStr::new("user.test2"), OsStr::new("user.test3"), ] .iter() .cloned() .collect(); for it in &items { tmp.set_xattr(it, b"value").unwrap(); } for it in tmp .list_xattr() .unwrap() .filter(|x| x.as_bytes().starts_with(b"user.")) { assert!(items.remove(&*it)); } assert!(items.is_empty()); }