1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53

use std::fmt;
use {Signal};


/// The exit status of a process
///
/// Returned either by `reap_zombies()` or by `child_events()`
/// or by `Child::wait()`
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum ExitStatus {
    /// Process exited normally with some exit code
    Exited(i8),
    /// Process was killed by a signal (bool flag is true when core is dumped)
    Signaled(Signal, /* dore dumped */bool)
}

impl ExitStatus {
    /// Returns `true` if this exit status means successful exit
    pub fn success(&self) -> bool {
        self == &ExitStatus::Exited(0)
    }
    /// Returns exit code if the process has exited normally
    pub fn code(&self) -> Option<i32> {
        match self {
            &ExitStatus::Exited(e) => Some(e as i32),
            &ExitStatus::Signaled(_, _) => None,
        }
    }
    /// Returns signal number if he process was killed by signal
    pub fn signal(&self) -> Option<i32> {
        match self {
            &ExitStatus::Exited(_) => None,
            &ExitStatus::Signaled(sig, _) => Some(sig as i32),
        }
    }
}

impl fmt::Display for ExitStatus {
    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
        use self::ExitStatus::*;
        match self {
            &Exited(c) => write!(fmt, "exited with code {}", c),
            &Signaled(sig, false) => {
                write!(fmt, "killed by signal {:?}[{}]",
                    sig, sig as i32)
            }
            &Signaled(sig, true) => {
                write!(fmt, "killed by signal {:?}[{}] (core dumped)",
                    sig, sig as i32)
            }
        }
    }
}