diff --git a/cut/cut.rs b/cut/cut.rs
index 16cc56636..b5ef40a12 100644
--- a/cut/cut.rs
+++ b/cut/cut.rs
@@ -14,7 +14,6 @@
 extern crate getopts;
 extern crate libc;
 
-use std::os;
 use std::io::{File, BufferedWriter, BufferedReader, stdin, print};
 use getopts::{optopt, optflag, getopts, usage};
 
@@ -414,9 +413,6 @@ fn cut_files(mut filenames: Vec<String>, mode: Mode) -> int {
     exit_code
 }
 
-#[allow(dead_code)]
-fn main() { os::set_exit_status(uumain(os::args())); }
-
 pub fn uumain(args: Vec<String>) -> int {
     let opts = [
         optopt("b", "bytes", "select only these bytes", "LIST"),
diff --git a/nohup/nohup.rs b/nohup/nohup.rs
index 4c7c493c3..492503eee 100644
--- a/nohup/nohup.rs
+++ b/nohup/nohup.rs
@@ -35,7 +35,10 @@ extern {
 
 #[cfg(target_os = "macos")]
 fn rewind_stdout<T: std::rt::rtio::RtioFileStream>(s: &mut T) {
-    s.seek(0, std::rt::rtio::SeekEnd);
+    match s.seek(0, std::rt::rtio::SeekEnd) {
+        Ok(_) => {}
+        Err(f) => crash!(1, "{}", f.detail.unwrap())
+    }
 }
 
 #[cfg(target_os = "linux")]
@@ -46,9 +49,6 @@ fn _vprocmgr_detach_from_console(_: u32) -> *libc::c_int { std::ptr::null() }
 #[cfg(target_os = "freebsd")]
 fn rewind_stdout<T: std::rt::rtio::RtioFileStream>(_: &mut T) {}
 
-#[allow(dead_code)]
-fn main () { std::os::set_exit_status(uumain(std::os::args())); }
-
 pub fn uumain(args: Vec<String>) -> int {
     let program = args.get(0);
 
@@ -78,7 +78,7 @@ pub fn uumain(args: Vec<String>) -> int {
 
     unsafe { signal(SIGHUP, SIG_IGN) };
 
-    if _vprocmgr_detach_from_console(0) != std::ptr::null() { crash!(2, "Cannot detach from console")};
+    if unsafe { _vprocmgr_detach_from_console(0) } != std::ptr::null() { crash!(2, "Cannot detach from console")};
 
     unsafe {
         // we ignore the memory leak here because it doesn't matter anymore