Use libc's declarations

src/sys/reboot.rs

@@ -1,41 +1,37 @@
 use {Errno, Error, Result};
-use libc::c_int;
+use libc;
 use void::Void;
 use std::mem::drop;
 
-#[allow(overflowing_literals)]
+#[repr(i32)]
 #[derive(Copy, Clone, Debug, Eq, PartialEq)]
 pub enum RebootMode {
-    Halt = 0xcdef0123,
-    kexec = 0x45584543,
-    PowerOff = 0x4321fedc,
-    Restart = 0x1234567,
+    Halt = libc::RB_HALT_SYSTEM,
+    kexec = libc::RB_KEXEC,
+    PowerOff = libc::RB_POWER_OFF,
+    Restart = libc::RB_AUTOBOOT,
     // we do not support Restart2,
-    Suspend = 0xd000fce1,
+    Suspend = libc::RB_SW_SUSPEND,
 }
 
 pub fn reboot(how: RebootMode) -> Result<Void> {
     unsafe {
-        ext::reboot(how as c_int)
+        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.
-#[allow(overflowing_literals)]
 pub fn set_cad_enabled(enable: bool) -> Result<()> {
+    let cmd = if enable {
+        libc::RB_ENABLE_CAD
+    } else {
+        libc::RB_DISABLE_CAD
+    };
     let res = unsafe {
-        ext::reboot(if enable { 0x89abcdef } else { 0 })
+        libc::reboot(cmd)
     };
     Errno::result(res).map(drop)
 }
-
-mod ext {
-    use libc::c_int;
-    extern {
-        pub fn reboot(cmd: c_int) -> c_int;
-    }
-}