new dir module

This is a lower-level interface than `std::fs::ReadDir`. Notable differences:

   * can be opened from a file descriptor (as returned by `openat`, perhaps
     before knowing if the path represents a file or directory). Uses
     `fdopendir` for this, available on all Unix platforms as of
     rust-lang/libc#1018.

   * implements `AsRawFd`, so it can be passed to `fstat`, `openat`, etc.

   * can be iterated through multiple times without closing and reopening the
     file descriptor. Each iteration rewinds when finished.

   * returns entries for `.` (current directory) and `..` (parent directory).

   * returns entries' names as a `CStr` (no allocation or conversion beyond
     whatever libc does).

1 files changed, 1 insertions, 0 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 07e84c12..ed96a8e1 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -29,6 +29,7 @@ pub extern crate libc;
 #[macro_use] mod macros;
 
 // Public crates
+pub mod dir;
 pub mod errno;
 #[deny(missing_docs)]
 pub mod features;