113 lines
3.6 KiB
Rust
113 lines
3.6 KiB
Rust
// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//! Temporary files and directories
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use io::{fs, IoResult};
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use io;
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use iter::{Iterator, range};
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use libc;
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use ops::Drop;
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use option::{Option, None, Some};
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use os;
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use path::{Path, GenericPath};
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use result::{Ok, Err};
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use sync::atomics;
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/// A wrapper for a path to temporary directory implementing automatic
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/// scope-based deletion.
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pub struct TempDir {
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path: Option<Path>,
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disarmed: bool
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}
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impl TempDir {
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/// Attempts to make a temporary directory inside of `tmpdir` whose name
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/// will have the suffix `suffix`. The directory will be automatically
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/// deleted once the returned wrapper is destroyed.
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///
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/// If no directory can be created, None is returned.
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pub fn new_in(tmpdir: &Path, suffix: &str) -> Option<TempDir> {
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if !tmpdir.is_absolute() {
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return TempDir::new_in(&os::make_absolute(tmpdir), suffix);
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}
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static mut CNT: atomics::AtomicUint = atomics::INIT_ATOMIC_UINT;
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for _ in range(0u, 1000) {
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let filename =
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format!("rs-{}-{}-{}",
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unsafe { libc::getpid() },
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unsafe { CNT.fetch_add(1, atomics::SeqCst) },
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suffix);
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let p = tmpdir.join(filename);
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match fs::mkdir(&p, io::UserRWX) {
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Err(..) => {}
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Ok(()) => return Some(TempDir { path: Some(p), disarmed: false })
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}
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}
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None
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}
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/// Attempts to make a temporary directory inside of `os::tmpdir()` whose
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/// name will have the suffix `suffix`. The directory will be automatically
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/// deleted once the returned wrapper is destroyed.
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///
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/// If no directory can be created, None is returned.
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pub fn new(suffix: &str) -> Option<TempDir> {
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TempDir::new_in(&os::tmpdir(), suffix)
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}
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/// Unwrap the wrapped `std::path::Path` from the `TempDir` wrapper.
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/// This discards the wrapper so that the automatic deletion of the
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/// temporary directory is prevented.
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pub fn unwrap(self) -> Path {
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let mut tmpdir = self;
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tmpdir.path.take_unwrap()
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}
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/// Access the wrapped `std::path::Path` to the temporary directory.
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pub fn path<'a>(&'a self) -> &'a Path {
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self.path.get_ref()
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}
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/// Close and remove the temporary directory
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///
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/// Although `TempDir` removes the directory on drop, in the destructor
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/// any errors are ignored. To detect errors cleaning up the temporary
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/// directory, call `close` instead.
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pub fn close(mut self) -> IoResult<()> {
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self.cleanup_dir()
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}
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fn cleanup_dir(&mut self) -> IoResult<()> {
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assert!(!self.disarmed);
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self.disarmed = true;
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match self.path {
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Some(ref p) => {
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fs::rmdir_recursive(p)
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}
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None => Ok(())
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}
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}
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}
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impl Drop for TempDir {
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fn drop(&mut self) {
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if !self.disarmed {
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let _ = self.cleanup_dir();
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}
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}
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}
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// the tests for this module need to change the path using change_dir,
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// and this doesn't play nicely with other tests so these unit tests are located
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// in src/test/run-pass/tempfile.rs
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