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|
use std::{
io::{Error, ErrorKind, Result},
process::ExitStatus,
result,
};
use ipc_channel::ipc;
use nix::sys::wait;
pub trait ToIOResult<T> {
fn to_io_result(self) -> Result<T>;
}
impl<T> ToIOResult<T> for nix::Result<T> {
fn to_io_result(self) -> Result<T> {
self.map_err(|error| match error {
nix::Error::Sys(code) => Error::from_raw_os_error(code as i32),
_ => Error::new(ErrorKind::Other, error),
})
}
}
pub trait Checkable {
fn check(&self) -> Result<()>;
}
impl Checkable for ExitStatus {
fn check(&self) -> Result<()> {
if self.success() {
Ok(())
} else {
Err(Error::new(
ErrorKind::Other,
format!("process exited with status {}", self),
))
}
}
}
impl Checkable for wait::WaitStatus {
fn check(&self) -> Result<()> {
match self {
wait::WaitStatus::Exited(_, 0) => Ok(()),
_ => Err(Error::new(
ErrorKind::Other,
format!("process exited with status {:?}", self),
)),
}
}
}
pub trait CheckDisconnect {
type Output;
fn check_disconnect(self) -> Result<Self::Output>;
}
impl<T> CheckDisconnect for result::Result<T, ipc::IpcError> {
type Output = result::Result<(), T>;
fn check_disconnect(self) -> Result<Self::Output> {
match self {
Ok(v) => Ok(Err(v)),
Err(ipc::IpcError::Disconnected) => Ok(Ok(())),
Err(error) => Err(Error::new(ErrorKind::Other, format!("{:?}", error))),
}
}
}
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