Use libc::uname and libc::utsname

Author: Susurrus

src/sys/utsname.rs

@@ -1,62 +1,41 @@
 use std::mem;
-use libc::{c_char};
+use libc::{self, c_char};
 use std::ffi::CStr;
-use std::str::from_utf8_unchecked; 
-
-mod ffi {
-    use libc::c_int;
-    use super::UtsName;
-
-    extern {
-        pub fn uname(buf: *mut UtsName) -> c_int;
-    }
-}
-
-
-const UTSNAME_LEN: usize = 65;
+use std::str::from_utf8_unchecked;
 
 #[repr(C)]
 #[derive(Copy)]
-pub struct UtsName {
-    sysname: [c_char; UTSNAME_LEN],
-    nodename: [c_char; UTSNAME_LEN],
-    release: [c_char; UTSNAME_LEN],
-    version: [c_char; UTSNAME_LEN],
-    machine: [c_char; UTSNAME_LEN],
-    // ifdef _GNU_SOURCE
-    #[allow(dead_code)]
-    domainname: [c_char; UTSNAME_LEN]
-}
+pub struct UtsName(libc::utsname);
 
 // workaround for `derive(Clone)` not working for fixed-length arrays
 impl Clone for UtsName { fn clone(&self) -> UtsName { *self } }
 
 impl UtsName {
     pub fn sysname<'a>(&'a self) -> &'a str {
-        to_str(&(&self.sysname as *const c_char ) as *const *const c_char)
+        to_str(&(&self.0.sysname as *const c_char ) as *const *const c_char)
     }
 
     pub fn nodename<'a>(&'a self) -> &'a str {
-        to_str(&(&self.nodename as *const c_char ) as *const *const c_char)
+        to_str(&(&self.0.nodename as *const c_char ) as *const *const c_char)
     }
 
     pub fn release<'a>(&'a self) -> &'a str {
-        to_str(&(&self.release as *const c_char ) as *const *const c_char)
+        to_str(&(&self.0.release as *const c_char ) as *const *const c_char)
     }
 
     pub fn version<'a>(&'a self) -> &'a str {
-        to_str(&(&self.version as *const c_char ) as *const *const c_char)
+        to_str(&(&self.0.version as *const c_char ) as *const *const c_char)
     }
 
     pub fn machine<'a>(&'a self) -> &'a str {
-        to_str(&(&self.machine as *const c_char ) as *const *const c_char)
+        to_str(&(&self.0.machine as *const c_char ) as *const *const c_char)
     }
 }
 
 pub fn uname() -> UtsName {
     unsafe {
         let mut ret: UtsName = mem::uninitialized();
-        ffi::uname(&mut ret as *mut UtsName);
+        libc::uname(&mut ret.0);
         ret
     }
 }