Merge pull request #18 from ids1024/fifo

Add flag for fifo

src/flag.rs

@@ -27,6 +27,7 @@ pub const MODE_TYPE: u16 = 0xF000;
 pub const MODE_DIR: u16 = 0x4000;
 pub const MODE_FILE: u16 = 0x8000;
 pub const MODE_SYMLINK: u16 = 0xA000;
+pub const MODE_FIFO: u16 = 0x1000;
 pub const MODE_CHR: u16 = 0x2000;
 
 pub const MODE_PERM: u16 = 0x0FFF;