1 //! Reboot/shutdown or enable/disable Ctrl-Alt-Delete. 2 3 use crate::errno::Errno; 4 use crate::Result; 5 use std::convert::Infallible; 6 use std::mem::drop; 7 8 libc_enum! { 9 /// How exactly should the system be rebooted. 10 /// 11 /// See [`set_cad_enabled()`](fn.set_cad_enabled.html) for 12 /// enabling/disabling Ctrl-Alt-Delete. 13 #[repr(i32)] 14 #[non_exhaustive] 15 pub enum RebootMode { 16 /// Halt the system. 17 RB_HALT_SYSTEM, 18 /// Execute a kernel that has been loaded earlier with 19 /// [`kexec_load(2)`](https://man7.org/linux/man-pages/man2/kexec_load.2.html). 20 RB_KEXEC, 21 /// Stop the system and switch off power, if possible. 22 RB_POWER_OFF, 23 /// Restart the system. 24 RB_AUTOBOOT, 25 // we do not support Restart2. 26 /// Suspend the system using software suspend. 27 RB_SW_SUSPEND, 28 } 29 } 30 31 /// Reboots or shuts down the system. reboot(how: RebootMode) -> Result<Infallible>32pub fn reboot(how: RebootMode) -> Result<Infallible> { 33 unsafe { libc::reboot(how as libc::c_int) }; 34 Err(Errno::last()) 35 } 36 37 /// Enable or disable the reboot keystroke (Ctrl-Alt-Delete). 38 /// 39 /// Corresponds to calling `reboot(RB_ENABLE_CAD)` or `reboot(RB_DISABLE_CAD)` in C. set_cad_enabled(enable: bool) -> Result<()>40pub fn set_cad_enabled(enable: bool) -> Result<()> { 41 let cmd = if enable { 42 libc::RB_ENABLE_CAD 43 } else { 44 libc::RB_DISABLE_CAD 45 }; 46 let res = unsafe { libc::reboot(cmd) }; 47 Errno::result(res).map(drop) 48 } 49