src/sys/reboot.rs


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

//! Reboot/shutdown or enable/disable Ctrl-Alt-Delete.

use {Errno, Error, Result};
use libc;
use void::Void;
use std::mem::drop;

libc_enum! {
    /// How exactly should the system be rebooted.
    ///
    /// See [`set_cad_enabled()`](fn.set_cad_enabled.html) for
    /// enabling/disabling Ctrl-Alt-Delete.
    #[repr(i32)]
    pub enum RebootMode {
        RB_HALT_SYSTEM,
        RB_KEXEC,
        RB_POWER_OFF,
        RB_AUTOBOOT,
        // we do not support Restart2,
        RB_SW_SUSPEND,
    }
}

pub fn reboot(how: RebootMode) -> Result<Void> {
    unsafe {
        libc::reboot(how as libc::c_int)
    };
    Err(Error::Sys(Errno::last()))
}

/// Enable or disable the reboot keystroke (Ctrl-Alt-Delete).
///
/// Corresponds to calling `reboot(RB_ENABLE_CAD)` or `reboot(RB_DISABLE_CAD)` in C.
pub fn set_cad_enabled(enable: bool) -> Result<()> {
    let cmd = if enable {
        libc::RB_ENABLE_CAD
    } else {
        libc::RB_DISABLE_CAD
    };
    let res = unsafe {
        libc::reboot(cmd)
    };
    Errno::result(res).map(drop)
}