Fix libc module name for FreeBSD

Author: lenaschoenburg

src/libstd/sys/unix/os.rs

@@ -167,22 +167,20 @@ impl StdError for JoinPathsError {
 #[cfg(target_os = "freebsd")]
 pub fn current_exe() -> io::Result<PathBuf> {
     unsafe {
-        use libc::funcs::bsd44::*;
-        use libc::consts::os::extra::*;
-        let mut mib = [CTL_KERN as c_int,
-                       KERN_PROC as c_int,
-                       KERN_PROC_PATHNAME as c_int,
+        let mut mib = [libc::CTL_KERN as c_int,
+                       libc::KERN_PROC as c_int,
+                       libc::KERN_PROC_PATHNAME as c_int,
                        -1 as c_int];
         let mut sz: libc::size_t = 0;
-        let err = sysctl(mib.as_mut_ptr(), mib.len() as ::libc::c_uint,
-                         ptr::null_mut(), &mut sz, ptr::null_mut(),
-                         0 as libc::size_t);
+        let err = libc::sysctl(mib.as_mut_ptr(), mib.len() as ::libc::c_uint,
+                               ptr::null_mut(), &mut sz, ptr::null_mut(),
+                               0 as libc::size_t);
         if err != 0 { return Err(io::Error::last_os_error()); }
         if sz == 0 { return Err(io::Error::last_os_error()); }
         let mut v: Vec<u8> = Vec::with_capacity(sz as usize);
-        let err = sysctl(mib.as_mut_ptr(), mib.len() as ::libc::c_uint,
-                         v.as_mut_ptr() as *mut libc::c_void, &mut sz,
-                         ptr::null_mut(), 0 as libc::size_t);
+        let err = libc::sysctl(mib.as_mut_ptr(), mib.len() as ::libc::c_uint,
+                               v.as_mut_ptr() as *mut libc::c_void, &mut sz,
+                               ptr::null_mut(), 0 as libc::size_t);
         if err != 0 { return Err(io::Error::last_os_error()); }
         if sz == 0 { return Err(io::Error::last_os_error()); }
         v.set_len(sz as usize - 1); // chop off trailing NUL