Fix compilation on Redox

Cargo.lock

-[root]
-name = "redox-ssh"
-version = "0.1.0"
-dependencies = [
- "byteorder 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.26 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-bigint 0.1.39 (git+https://github.com/rust-num/num)",
- "rand 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
- "redox_syscall 0.1.26 (registry+https://github.com/rust-lang/crates.io-index)",
- "rust-crypto 0.2.36 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "byteorder"
 version = "1.1.0"
@@ -72,6 +59,19 @@ dependencies = [
  "libc 0.2.26 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "redox-ssh"
+version = "0.1.0"
+dependencies = [
+ "byteorder 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.26 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-bigint 0.1.39 (git+https://github.com/rust-num/num)",
+ "rand 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "redox_syscall 0.1.26 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rust-crypto 0.2.36 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "redox_syscall"
 version = "0.1.26"

src/channel.rs

@@ -86,10 +86,17 @@ impl Channel {
                 );
 
                 self.read_thread = Some(thread::spawn(move || {
+                    #[cfg(target_os = "redox")]
+                    use syscall::dup;
+                    #[cfg(target_os = "redox")]
+                    let master2 = unsafe { dup(master_fd, &[]).unwrap_or(!0) };
+
+                    #[cfg(not(target_os = "redox"))]
                     use libc::dup;
+                    #[cfg(not(target_os = "redox"))]
                     let master2 = unsafe { dup(master_fd) };
 
-                    println!("dup result: {}", dup as u32);
+                    println!("dup result: {}", master2 as u32);
                     let mut master = unsafe { File::from_raw_fd(master2) };
                     loop {
                         use std::str::from_utf8_unchecked;