+++ /dev/null
-// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-use std::env;
-use std::io::{self, Error, ErrorKind};
-use std::fs;
-use std::path::{self, PathBuf, Path};
-use rand::{thread_rng, Rng};
-
-/// A wrapper for a path to temporary directory implementing automatic
-/// scope-based deletion.
-pub struct TempDir {
- path: Option<PathBuf>,
-}
-
-// How many times should we (re)try finding an unused random name? It should be
-// enough that an attacker will run out of luck before we run out of patience.
-const NUM_RETRIES: u32 = 1 << 31;
-// How many characters should we include in a random file name? It needs to
-// be enough to dissuade an attacker from trying to preemptively create names
-// of that length, but not so huge that we unnecessarily drain the random number
-// generator of entropy.
-const NUM_RAND_CHARS: usize = 12;
-
-impl TempDir {
- /// Attempts to make a temporary directory inside of `tmpdir` whose name
- /// will have the prefix `prefix`. The directory will be automatically
- /// deleted once the returned wrapper is destroyed.
- ///
- /// If no directory can be created, `Err` is returned.
- #[allow(deprecated)] // rand usage
- pub fn new_in<P: AsRef<Path>>(tmpdir: P, prefix: &str)
- -> io::Result<TempDir> {
- Self::_new_in(tmpdir.as_ref(), prefix)
- }
-
- fn _new_in(tmpdir: &Path, prefix: &str) -> io::Result<TempDir> {
- let storage;
- let mut tmpdir = tmpdir;
- if !tmpdir.is_absolute() {
- let cur_dir = env::current_dir()?;
- storage = cur_dir.join(tmpdir);
- tmpdir = &storage;
- // return TempDir::new_in(&cur_dir.join(tmpdir), prefix);
- }
-
- let mut rng = thread_rng();
- for _ in 0..NUM_RETRIES {
- let suffix: String = rng.gen_ascii_chars().take(NUM_RAND_CHARS).collect();
- let leaf = if !prefix.is_empty() {
- format!("{}.{}", prefix, suffix)
- } else {
- // If we're given an empty string for a prefix, then creating a
- // directory starting with "." would lead to it being
- // semi-invisible on some systems.
- suffix
- };
- let path = tmpdir.join(&leaf);
- match fs::create_dir(&path) {
- Ok(_) => return Ok(TempDir { path: Some(path) }),
- Err(ref e) if e.kind() == ErrorKind::AlreadyExists => {}
- Err(e) => return Err(e)
- }
- }
-
- Err(Error::new(ErrorKind::AlreadyExists,
- "too many temporary directories already exist"))
- }
-
- /// Attempts to make a temporary directory inside of `env::temp_dir()` whose
- /// name will have the prefix `prefix`. The directory will be automatically
- /// deleted once the returned wrapper is destroyed.
- ///
- /// If no directory can be created, `Err` is returned.
- pub fn new(prefix: &str) -> io::Result<TempDir> {
- TempDir::new_in(&env::temp_dir(), prefix)
- }
-
- /// Unwrap the wrapped `std::path::Path` from the `TempDir` wrapper.
- /// This discards the wrapper so that the automatic deletion of the
- /// temporary directory is prevented.
- pub fn into_path(mut self) -> PathBuf {
- self.path.take().unwrap()
- }
-
- /// Access the wrapped `std::path::Path` to the temporary directory.
- pub fn path(&self) -> &path::Path {
- self.path.as_ref().unwrap()
- }
-
- fn cleanup_dir(&mut self) -> io::Result<()> {
- match self.path {
- Some(ref p) => fs::remove_dir_all(p),
- None => Ok(())
- }
- }
-}
-
-impl Drop for TempDir {
- fn drop(&mut self) {
- let _ = self.cleanup_dir();
- }
-}
-
-// the tests for this module need to change the path using change_dir,
-// and this doesn't play nicely with other tests so these unit tests are located
-// in src/test/run-pass/tempfile.rs
projects / rust.git / commitdiff