1 files changed, 48 insertions, 0 deletions
diff --git a/third_party/rust/nix/src/sys/reboot.rs b/third_party/rust/nix/src/sys/reboot.rs
new file mode 100644
index 0000000000..02d98162bd
--- /dev/null
+++ b/third_party/rust/nix/src/sys/reboot.rs
@@ -0,0 +1,48 @@
+//! Reboot/shutdown or enable/disable Ctrl-Alt-Delete.
+
+use crate::errno::Errno;
+use crate::Result;
+use std::convert::Infallible;
+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)]
+    #[non_exhaustive]
+    pub enum RebootMode {
+        /// Halt the system.
+        RB_HALT_SYSTEM,
+        /// Execute a kernel that has been loaded earlier with
+        /// [`kexec_load(2)`](https://man7.org/linux/man-pages/man2/kexec_load.2.html).
+        RB_KEXEC,
+        /// Stop the system and switch off power, if possible.
+        RB_POWER_OFF,
+        /// Restart the system.
+        RB_AUTOBOOT,
+        // we do not support Restart2.
+        /// Suspend the system using software suspend.
+        RB_SW_SUSPEND,
+    }
+}
+
+/// Reboots or shuts down the system.
+pub fn reboot(how: RebootMode) -> Result<Infallible> {
+    unsafe { libc::reboot(how as libc::c_int) };
+    Err(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)
+}