Add dirent DT_* definitions

Author: alexcrichton

src/unix/mod.rs

@@ -92,6 +92,14 @@ pub const SIG_DFL: sighandler_t = 0 as sighandler_t;
 pub const SIG_IGN: sighandler_t = 1 as sighandler_t;
 pub const SIG_ERR: sighandler_t = !0 as sighandler_t;
 
+pub const DT_FIFO: ::c_int = 1;
+pub const DT_CHR: ::c_int = 2;
+pub const DT_DIR: ::c_int = 4;
+pub const DT_BLK: ::c_int = 6;
+pub const DT_REG: ::c_int = 8;
+pub const DT_LNK: ::c_int = 10;
+pub const DT_SOCK: ::c_int = 12;
+
 cfg_if! {
     if #[cfg(feature = "default")] {
         // cargo build, don't pull in anything extra as the libstd  dep