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use std::fs;
use std::io;
use std::os::unix::fs::MetadataExt;
use std::os::unix::fs::PermissionsExt;
use std::os::unix::net::UnixStream;
use std::path::Path;
#[derive(Clone, Copy, Debug, Eq, PartialEq)]
pub(crate) struct SocketFileIdentity {
dev: u64,
ino: u64,
}
pub(crate) fn prepare_socket_path(
path: &Path,
busy_message: impl FnOnce(&Path) -> String,
) -> io::Result<()> {
if let Some(parent) = path.parent() {
fs::create_dir_all(parent)?;
}
if !path.exists() {
return Ok(());
}
match UnixStream::connect(path) {
Ok(_) => {
return Err(io::Error::new(io::ErrorKind::AddrInUse, busy_message(path)));
}
Err(err)
if matches!(
err.kind(),
io::ErrorKind::ConnectionRefused
| io::ErrorKind::NotFound
| io::ErrorKind::TimedOut
) => {}
Err(err) => return Err(err),
}
if let Err(err) = fs::remove_file(path) {
if err.kind() != io::ErrorKind::NotFound {
return Err(err);
}
}
Ok(())
}
pub(crate) fn socket_file_identity(path: &Path) -> io::Result<SocketFileIdentity> {
let metadata = fs::metadata(path)?;
Ok(SocketFileIdentity {
dev: metadata.dev(),
ino: metadata.ino(),
})
}
pub(crate) fn remove_socket_file_if_owned(
path: &Path,
identity: SocketFileIdentity,
) -> io::Result<()> {
let current = match socket_file_identity(path) {
Ok(current) => current,
Err(err) if err.kind() == io::ErrorKind::NotFound => return Ok(()),
Err(err) => return Err(err),
};
if current != identity {
return Ok(());
}
match fs::remove_file(path) {
Ok(()) => Ok(()),
Err(err) if err.kind() == io::ErrorKind::NotFound => Ok(()),
Err(err) => Err(err),
}
}
pub(crate) fn restrict_socket_permissions(path: &Path, mode: u32) -> io::Result<()> {
let mut permissions = fs::metadata(path)?.permissions();
permissions.set_mode(mode);
fs::set_permissions(path, permissions)
}
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