diff --git a/utshell-0.5/r_input/Cargo.toml b/utshell-0.5/r_input/Cargo.toml
index 34a6bdf7cbab224fea0b85d00e6100aa4e814a69..60505d414886c22a1e24110082b2e24296fe3818 100644
--- a/utshell-0.5/r_input/Cargo.toml
+++ b/utshell-0.5/r_input/Cargo.toml
@@ -13,3 +13,4 @@ r_bash = {path = "../r_bash"}
 [lib]
 name = "r_input"
 crate-type = ["staticlib","rlib"]
+
diff --git a/utshell-0.5/r_input/src/lib.rs b/utshell-0.5/r_input/src/lib.rs
index b76063114e8eb46cbffd0cc362ff4833bc219baa..085684641ef6b91f6ad25f40489f13346d780850 100644
--- a/utshell-0.5/r_input/src/lib.rs
+++ b/utshell-0.5/r_input/src/lib.rs
@@ -11,3 +11,41 @@
     unused_assignments,
     unused_mut
 )]
+use libc::FILE;
+use r_bash::*;
+extern "C" {
+    fn fcntl(__fd: libc::c_int, __cmd: libc::c_int, _: ...) -> libc::c_int;
+    fn open(__file: *const libc::c_char, __oflag: libc::c_int, _: ...) -> libc::c_int;
+    fn __fxstat(__ver: libc::c_int, __fildes: libc::c_int, __stat_buf: *mut stat) -> libc::c_int;
+    fn fileno(__stream: *mut FILE) -> libc::c_int;
+    fn __errno_location() -> *mut libc::c_int;
+    fn lseek(__fd: libc::c_int, __offset: __off_t, __whence: libc::c_int) -> __off_t;
+    fn close(__fd: libc::c_int) -> libc::c_int;
+    fn read(__fd: libc::c_int, __buf: *mut libc::c_void, __nbytes: size_t) -> ssize_t;
+    fn dcgettext(
+        __domainname: *const libc::c_char,
+        __msgid: *const libc::c_char,
+        __category: libc::c_int,
+    ) -> *mut libc::c_char;
+    fn sh_unset_nodelay_mode(_: libc::c_int) -> libc::c_int;
+    fn sys_error(_: *const libc::c_char, _: ...);
+    fn internal_error(_: *const libc::c_char, _: ...);
+    fn termsig_handler(_: libc::c_int);
+    fn throw_to_top_level();
+    static mut interrupt_state: sig_atomic_t;
+    static mut terminating_signal: sig_atomic_t;
+    fn return_EOF() -> libc::c_int;
+    fn xbcopy(_: *mut libc::c_char, _: *mut libc::c_char, _: libc::c_int);
+    fn zread(_: libc::c_int, _: *mut libc::c_char, _: size_t) -> ssize_t;
+    static mut interactive_shell: libc::c_int;
+    static mut default_buffered_input: libc::c_int;
+    static mut bash_input: BASH_INPUT;
+    fn init_yy_io(
+        _: Option<sh_cget_func_t>,
+        _: Option<sh_cunget_func_t>,
+        _: stream_type,
+        _: *const libc::c_char,
+        _: INPUT_STREAM,
+    );
+    fn run_pending_traps();
+}
\ No newline at end of file