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use std::io::{self, Read, Write};
use std::fs::{File, remove_file};
use std::os::unix::io::FromRawFd;
use std::ffi::CString;
use std::fmt::Arguments;
extern crate libc;
pub struct TempFile {
file: Option<File>,
path: String,
auto_delete: bool
}
impl TempFile {
pub fn new(template: &str, auto_delete: bool) -> io::Result<TempFile> {
let ptr = CString::new(template)?.into_raw();
let fd = unsafe { libc::mkstemp(ptr) };
let path = unsafe { CString::from_raw(ptr) };
if fd < 0 {
return Err(io::Error::last_os_error())
}
let file = unsafe { File::from_raw_fd(fd) };
Ok(TempFile {
file: Some(file),
path: path.into_string().map_err(|e| io::Error::new(io::ErrorKind::Other, e))?,
auto_delete: auto_delete
})
}
pub fn path(&self) -> &str {
&self.path
}
pub fn inner(&mut self) -> &mut File {
self.file.as_mut().unwrap()
}
}
impl Drop for TempFile {
fn drop(&mut self) {
self.file = None;
if self.auto_delete {
let _ = remove_file(&self.path);
}
}
}
impl Read for TempFile {
fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
self.inner().read(buf)
}
fn read_to_end(&mut self, buf: &mut Vec<u8>) -> io::Result<usize> {
self.inner().read_to_end(buf)
}
fn read_to_string(&mut self, buf: &mut String) -> io::Result<usize> {
self.inner().read_to_string(buf)
}
fn read_exact(&mut self, buf: &mut [u8]) -> io::Result<()> {
self.inner().read_exact(buf)
}
}
impl Write for TempFile {
fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
self.inner().write(buf)
}
fn flush(&mut self) -> io::Result<()> {
self.inner().flush()
}
fn write_all(&mut self, buf: &[u8]) -> io::Result<()> {
self.inner().write_all(buf)
}
fn write_fmt(&mut self, fmt: Arguments) -> io::Result<()> {
self.inner().write_fmt(fmt)
}
}