1 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 #![unstable(feature = "tempdir", reason = "needs an RFC before stabilization")]
12 #![deprecated(since = "1.0.0",
13 reason = "use the `tempdir` crate from crates.io instead")]
19 use io::{self, Error, ErrorKind};
21 use path::{self, PathBuf};
22 use rand::{thread_rng, Rng};
24 /// A wrapper for a path to temporary directory implementing automatic
25 /// scope-based deletion.
27 path: Option<PathBuf>,
30 // How many times should we (re)try finding an unused random name? It should be
31 // enough that an attacker will run out of luck before we run out of patience.
32 const NUM_RETRIES: u32 = 1 << 31;
33 // How many characters should we include in a random file name? It needs to
34 // be enough to dissuade an attacker from trying to preemptively create names
35 // of that length, but not so huge that we unnecessarily drain the random number
36 // generator of entropy.
37 const NUM_RAND_CHARS: uint = 12;
40 /// Attempts to make a temporary directory inside of `tmpdir` whose name
41 /// will have the prefix `prefix`. The directory will be automatically
42 /// deleted once the returned wrapper is destroyed.
44 /// If no directory can be created, `Err` is returned.
45 #[allow(deprecated)] // rand usage
46 pub fn new_in<P: AsRef<path::Path>>(tmpdir: P, prefix: &str) -> io::Result<TempDir> {
48 let mut tmpdir = tmpdir.as_ref();
49 if !tmpdir.is_absolute() {
50 let cur_dir = try!(env::current_dir());
51 storage = cur_dir.join(tmpdir);
53 // return TempDir::new_in(&cur_dir.join(tmpdir), prefix);
56 let mut rng = thread_rng();
57 for _ in 0..NUM_RETRIES {
58 let suffix: String = rng.gen_ascii_chars().take(NUM_RAND_CHARS).collect();
59 let leaf = if prefix.len() > 0 {
60 format!("{}.{}", prefix, suffix)
62 // If we're given an empty string for a prefix, then creating a
63 // directory starting with "." would lead to it being
64 // semi-invisible on some systems.
67 let path = tmpdir.join(&leaf);
68 match fs::create_dir(&path) {
69 Ok(_) => return Ok(TempDir { path: Some(path) }),
70 Err(ref e) if e.kind() == ErrorKind::AlreadyExists => {}
71 Err(e) => return Err(e)
75 Err(Error::new(ErrorKind::AlreadyExists,
76 "too many temporary directories already exist",
80 /// Attempts to make a temporary directory inside of `env::temp_dir()` whose
81 /// name will have the prefix `prefix`. The directory will be automatically
82 /// deleted once the returned wrapper is destroyed.
84 /// If no directory can be created, `Err` is returned.
86 pub fn new(prefix: &str) -> io::Result<TempDir> {
87 TempDir::new_in(&env::temp_dir(), prefix)
90 /// Unwrap the wrapped `std::path::Path` from the `TempDir` wrapper.
91 /// This discards the wrapper so that the automatic deletion of the
92 /// temporary directory is prevented.
93 pub fn into_path(mut self) -> PathBuf {
94 self.path.take().unwrap()
97 /// Access the wrapped `std::path::Path` to the temporary directory.
98 pub fn path(&self) -> &path::Path {
99 self.path.as_ref().unwrap()
102 /// Close and remove the temporary directory
104 /// Although `TempDir` removes the directory on drop, in the destructor
105 /// any errors are ignored. To detect errors cleaning up the temporary
106 /// directory, call `close` instead.
107 pub fn close(mut self) -> io::Result<()> {
111 fn cleanup_dir(&mut self) -> io::Result<()> {
113 Some(ref p) => fs::remove_dir_all(p),
119 impl Drop for TempDir {
121 let _ = self.cleanup_dir();
125 // the tests for this module need to change the path using change_dir,
126 // and this doesn't play nicely with other tests so these unit tests are located
127 // in src/test/run-pass/tempfile.rs