From 05b7749fdc147b3f413b97b3a0adfc0cec91891c Mon Sep 17 00:00:00 2001
From: Qingping Hou <dave2008713@gmail.com>
Date: Tue, 28 Apr 2015 01:59:17 -0400
Subject: feat: add chroot syscall

---
 src/unistd.rs | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

(limited to 'src/unistd.rs')

diff --git a/src/unistd.rs b/src/unistd.rs
index 6d7e2982..354e46db 100644
--- a/src/unistd.rs
+++ b/src/unistd.rs
@@ -41,6 +41,10 @@ mod ffi {
         // gets the hostname
         // doc: http://man7.org/linux/man-pages/man2/gethostname.2.html
         pub fn sethostname(name: *const c_char, len: size_t) -> c_int;
+
+        // change root directory
+        // doc: http://man7.org/linux/man-pages/man2/gethostname.2.html
+        pub fn chroot(path: *const c_char) -> c_int;
     }
 }
 
@@ -293,6 +297,19 @@ pub fn unlink<P: ?Sized + NixPath>(path: &P) -> Result<()> {
     from_ffi(res)
 }
 
+#[inline]
+pub fn chroot<P: ?Sized + NixPath>(path: &P) -> Result<()> {
+    let res = try!(path.with_nix_path(|osstr| {
+        unsafe { ffi::chroot(osstr.as_ext_str()) }
+    }));
+
+    if res != 0 {
+        return Err(Error::Sys(Errno::last()));
+    }
+
+    Ok(())
+}
+
 #[cfg(any(target_os = "linux", target_os = "android"))]
 mod linux {
     use sys::syscall::{syscall, SYSPIVOTROOT};
-- 
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