diff --git a/utshell-0.5/r_general/src/lib.rs b/utshell-0.5/r_general/src/lib.rs
index b43c64397a050d244ce47d50d6e3346d455e62bc..a6a68e80bfe20cac00b832b317210897dc5c374d 100644
--- a/utshell-0.5/r_general/src/lib.rs
+++ b/utshell-0.5/r_general/src/lib.rs
@@ -102,3 +102,273 @@ extern "C" {
     static mut tilde_additional_suffixes: *mut *mut libc::c_char;
     fn tilde_expand(_: *const libc::c_char) -> *mut libc::c_char;
 }
+
+
+pub const _ISalnum: libc::c_int = 8;
+pub const _ISalpha: libc::c_int = 1024;
+pub const _ISblank: libc::c_int = 1;
+pub const _CS_PATH: libc::c_int = 0;
+pub const W_HASDOLLAR: libc::c_int = 1 << 0;
+pub const W_QUOTED: libc::c_int = 1 << 1;
+pub const CBLANK: libc::c_int = 0x2000;
+pub const CSHBRK: libc::c_int = 0x0002;
+pub const CXQUOTE: libc::c_int = 0x0400;
+pub const F_GETFL: libc::c_int = 3;
+pub const F_SETFL: libc::c_int = 4;
+pub const O_NONBLOCK: libc::c_int = 0o4000;
+pub const O_NDELAY: libc::c_int = 0o4000;
+pub const F_SETFD: libc::c_int = 2;
+pub const FD_CLOEXEC: libc::c_int = 1;
+pub const F_GETFD: libc::c_int = 1;
+pub const SEEK_CUR: libc::c_int = 1;
+pub const ESPIPE: libc::c_int = 29;
+pub const O_RDWR: libc::c_int = 0o2;
+pub const HIGH_FD_MAX: libc::c_int = 256;
+pub const W_OK: libc::c_int = 2;
+pub const MP_DOCWD: libc::c_int = 0x02;
+pub const MP_RMDOT: libc::c_int = 0x04;
+pub const PATH_MAX: libc::c_int = 4096;
+
+pub type size_t = libc::c_ulong;
+pub type __off64_t = libc::c_long;
+pub type _IO_lock_t = ();
+pub type __off_t = libc::c_long;
+pub type __intmax_t = libc::c_long;
+pub type __dev_t = libc::c_ulong;
+pub type __uid_t = libc::c_uint;
+pub type __gid_t = libc::c_uint;
+pub type __ino_t = libc::c_ulong;
+pub type __mode_t = libc::c_uint;
+pub type __nlink_t = libc::c_ulong;
+pub type __rlim_t = libc::c_ulong;
+pub type __time_t = libc::c_long;
+pub type __blksize_t = libc::c_long;
+pub type __blkcnt_t = libc::c_long;
+pub type __syscall_slong_t = libc::c_long;
+pub type __sig_atomic_t = libc::c_int;
+pub type gid_t = __gid_t;
+pub type uid_t = __uid_t;
+#[derive(Copy, Clone)]
+#[repr(C)]
+pub struct timespec {
+    pub tv_sec: __time_t,
+    pub tv_nsec: __syscall_slong_t,
+}
+pub type intmax_t = __intmax_t;
+pub type sig_atomic_t = __sig_atomic_t;
+#[derive(Copy, Clone)]
+#[repr(C)]
+pub struct stat {
+    pub st_dev: __dev_t,
+    pub st_ino: __ino_t,
+    pub st_nlink: __nlink_t,
+    pub st_mode: __mode_t,
+    pub st_uid: __uid_t,
+    pub st_gid: __gid_t,
+    pub __pad0: libc::c_int,
+    pub st_rdev: __dev_t,
+    pub st_size: __off_t,
+    pub st_blksize: __blksize_t,
+    pub st_blocks: __blkcnt_t,
+    pub st_atim: timespec,
+    pub st_mtim: timespec,
+    pub st_ctim: timespec,
+    pub __glibc_reserved: [__syscall_slong_t; 3],
+}
+
+#[derive(Copy, Clone)]
+#[repr(C)]
+pub struct user_info {
+    pub uid: uid_t,
+    pub euid: uid_t,
+    pub gid: gid_t,
+    pub egid: gid_t,
+    pub user_name: *mut libc::c_char,
+    pub shell: *mut libc::c_char,
+    pub home_dir: *mut libc::c_char,
+}
+
+#[derive(Copy, Clone)]
+#[repr(C)]
+pub struct word_desc {
+    pub word: *mut libc::c_char,
+    pub flags: libc::c_int,
+}
+pub type WORD_DESC = word_desc;
+pub type rlim_t = __rlim_t;
+#[derive(Copy, Clone)]
+#[repr(C)]
+pub struct C2RustUnnamed_1 {
+    pub posix_mode_var: *mut libc::c_int,
+}
+pub type tilde_hook_func_t = unsafe extern "C" fn(*mut libc::c_char) -> *mut libc::c_char;
+
+#[macro_export]
+macro_rules! whitespace {
+    ($c:expr) => {
+        ($c as libc::c_int == ' ' as i32 || $c as libc::c_int == '\t' as i32)
+    };
+}
+#[macro_export]
+macro_rules! DIGIT {
+    ($c:expr) => {
+        ($c as libc::c_int >= '0' as i32 && $c as libc::c_int <= '9' as i32)
+    };
+}
+#[macro_export]
+macro_rules! TODIGIT {
+    ($c:expr) => {
+        ($c as libc::c_int - '0' as i32)
+    };
+}
+#[macro_export]
+macro_rules! savestring {
+    ($x:expr) => {
+        strcpy(
+            libc::malloc((strlen($x as *const libc::c_char) + 1) as usize) as *mut libc::c_char,
+            $x,
+        ) as *mut libc::c_char
+    };
+}
+#[macro_export]
+macro_rules! IN_CTYPE_DOMAIN {
+    ($c:expr) => {
+        1 as i32
+    };
+}
+#[macro_export]
+macro_rules! ISALPHA {
+    ($c:expr) => {
+        IN_CTYPE_DOMAIN!($c) != 0 && isalpha!($c) != 0 as libc::c_int
+    };
+}
+#[macro_export]
+macro_rules! isalpha {
+    ($c:expr) => {
+        __isctype_f!($c, _ISalpha)
+    };
+}
+#[macro_export]
+macro_rules! __isctype_f {
+    ($c:expr,$type:expr) => {
+        *(*__ctype_b_loc()).offset($c as libc::c_int as isize) as libc::c_int
+            & ($type as libc::c_int as libc::c_ushort as libc::c_int)
+    };
+}
+#[macro_export]
+macro_rules! legal_variable_starter {
+    ($c: expr) => {
+        (ISALPHA!($c) || ($c as i32 == '_' as i32))
+    };
+}
+#[macro_export]
+macro_rules! legal_variable_char {
+    ($c: expr) => {
+        (ISALNUM!($c) || ($c as i32 == '_' as i32))
+    };
+}
+#[macro_export]
+macro_rules! ISALNUM {
+    ($c:expr) => {
+        IN_CTYPE_DOMAIN!($c) != 0 && isalnum!($c) != 0 as libc::c_int
+    };
+}
+#[macro_export]
+macro_rules! isalnum {
+    ($c:expr) => {
+        __isctype_f!($c, _ISalnum)
+    };
+}
+
+#[macro_export]
+macro_rules! STREQ {
+    ($a:expr, $b:expr) => {
+        (*$a.offset(0 as libc::c_int as isize) as libc::c_int
+            == *$b.offset(0 as libc::c_int as isize) as libc::c_int
+            && strcmp($a, $b) == 0 as libc::c_int)
+    };
+}
+
+#[macro_export]
+macro_rules! shellblank {
+    ($c: expr) => {
+        (*sh_syntaxtab.as_mut_ptr().offset($c) & CBLANK)
+    };
+}
+#[macro_export]
+macro_rules! shellbreak {
+    ($c: expr) => {
+        (*sh_syntaxtab.as_mut_ptr().offset($c) & CSHBRK)
+    };
+}
+#[macro_export]
+macro_rules! shellxquote {
+    ($c: expr) => {
+        (*sh_syntaxtab.as_mut_ptr().offset($c) & CXQUOTE)
+    };
+}
+#[macro_export]
+macro_rules! shellexp {
+    ($c: expr) => {
+        ($c == '$' as i32 || $c == '<' as i32  || $c == '>' as i32)
+    };
+}
+#[macro_export]
+macro_rules! isblank {
+    ($c: expr) => {
+        (__isctype_f!(($c), _ISblank))
+    };
+}
+#[macro_export]
+macro_rules! SET_CLOSE_ON_EXEC {
+    ($fd: expr) => {
+        (fcntl(($fd), F_SETFD, FD_CLOEXEC))
+    };
+}
+#[macro_export]
+macro_rules! S_ISDIR {
+    ($mode:expr) => {
+        $mode & 0o170000 as libc::c_uint == 0o40000 as libc::c_uint
+    };
+}
+#[macro_export]
+macro_rules! PATHSEP {
+    ($c: expr) => {
+        (ISDIRSEP!($c) || ($c) == 0)
+    };
+}
+#[macro_export]
+macro_rules! ISDIRSEP {
+    ($c: expr) => {
+        (($c) == '/' as i32)
+    };
+}
+#[macro_export]
+macro_rules! ABSPATH {
+    ($c: expr) => {
+        (*$c.offset(0 as libc::c_int as isize) as libc::c_int == '/' as i32)
+    };
+}
+#[macro_export]
+macro_rules! TILDE_END {
+    ($c: expr) => {
+        (($c) == '\0' as i32 || ($c) == '/' as i32 || ($c) == ':' as i32)
+    };
+}
+#[macro_export]
+macro_rules! QUIT {
+    () => {
+        if terminating_signal != 0 {
+            termsig_handler(terminating_signal);
+        }
+        if interrupt_state != 0 {
+            throw_to_top_level();
+        }
+    };
+}
+#[macro_export]
+macro_rules! STANDARD_UTILS_PATH {
+    () => {
+        (b"/bin:/usr/bin:/usr/sbin:/sbin\0" as *const u8 as *const libc::c_char)
+    };
+}
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