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// Copyright 2013 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.
//! Temporary files and directories
use io::fs;
use io;
use iter::{Iterator, range};
use libc;
use ops::Drop;
use option::{Option, None, Some};
use os;
use path::{Path, GenericPath};
use result::{Ok, Err};
use sync::atomics;
/// A wrapper for a path to temporary directory implementing automatic
/// scope-based deletion.
pub struct TempDir {
priv path: Option<Path>
}
impl TempDir {
/// Attempts to make a temporary directory inside of `tmpdir` whose name
/// will have the suffix `suffix`. The directory will be automatically
/// deleted once the returned wrapper is destroyed.
///
/// If no directory can be created, None is returned.
pub fn new_in(tmpdir: &Path, suffix: &str) -> Option<TempDir> {
if !tmpdir.is_absolute() {
return TempDir::new_in(&os::make_absolute(tmpdir), suffix);
}
static mut CNT: atomics::AtomicUint = atomics::INIT_ATOMIC_UINT;
for _ in range(0u, 1000) {
let filename = format!("rs-{}-{}-{}",
unsafe { libc::getpid() },
unsafe { CNT.fetch_add(1, atomics::SeqCst) },
suffix);
let p = tmpdir.join(filename);
match fs::mkdir(&p, io::UserRWX) {
Err(..) => {}
Ok(()) => return Some(TempDir { path: Some(p) })
}
}
None
}
/// Attempts to make a temporary directory inside of `os::tmpdir()` whose
/// name will have the suffix `suffix`. The directory will be automatically
/// deleted once the returned wrapper is destroyed.
///
/// If no directory can be created, None is returned.
pub fn new(suffix: &str) -> Option<TempDir> {
TempDir::new_in(&os::tmpdir(), suffix)
}
/// 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 unwrap(self) -> Path {
let mut tmpdir = self;
tmpdir.path.take_unwrap()
}
/// Access the wrapped `std::path::Path` to the temporary directory.
pub fn path<'a>(&'a self) -> &'a Path {
self.path.get_ref()
}
}
impl Drop for TempDir {
fn drop(&mut self) {
for path in self.path.iter() {
if path.exists() {
// FIXME: is failing the right thing to do?
fs::rmdir_recursive(path).unwrap();
}
}
}
}
// 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
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