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use nix;
use std::time::Duration;
#[derive(Debug)]
pub struct ProcessSignalInfo {
pub pid: nix::unistd::Pid,
pub signal: nix::sys::signal::Signal,
pub coredump: bool
}
#[derive(Debug)]
pub enum WaitError {
TimedOut(Duration),
ReturnNonZero(i32, nix::unistd::Pid),
Signaled(ProcessSignalInfo),
OsError(nix::Error),
NotExited
}
impl From<nix::Error> for WaitError {
fn from(err: nix::Error) -> Self {
WaitError::OsError(err)
}
}
impl std::fmt::Display for WaitError {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
match *self {
WaitError::TimedOut(dur) => write!(f, "process timed out in {:?}", dur),
WaitError::ReturnNonZero(ret, pid) =>
write!(f, "process exited with non-zero exit code ({}). was {}", ret, pid),
WaitError::Signaled(ref info) =>
write!(f, "process killed by {} {}. was {}",
info.signal, if info.coredump {"(core dumped)"} else {""}, info.pid),
WaitError::OsError(err) => err.fmt(f),
WaitError::NotExited => write!(f, "process signaled, but not exited")
}
}
}
impl std::error::Error for WaitError {
fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
match *self {
WaitError::TimedOut(_) |
WaitError::ReturnNonZero(_, _) |
WaitError::Signaled(_) |
WaitError::NotExited => None,
WaitError::OsError(ref e) => Some(e)
}
}
}
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