diff --git a/bash-5.1/r_execute_cmd/src/lib.rs b/bash-5.1/r_execute_cmd/src/lib.rs
index 2366482639c5a2c7b3f3085cf4573ef6bc5b0c53..5eb1022b033fd28b8f7bdd87dc1e58103ce49477 100644
--- a/bash-5.1/r_execute_cmd/src/lib.rs
+++ b/bash-5.1/r_execute_cmd/src/lib.rs
@@ -1999,7 +1999,45 @@ unsafe extern "C" fn coproc_setstatus(mut cp: *mut coproc, mut status: libc::c_i
     (*cp).c_lock = 0 as libc::c_int;
 }
 
+#[no_mangle]
+pub unsafe extern "C" fn coproc_pidchk(mut pid: pid_t, mut status: libc::c_int) {
+    let mut cp: *mut coproc = 0 as *mut coproc;
+
+    cp = getcoprocbypid(pid);
+    if !cp.is_null() {
+        coproc_setstatus(cp, status);
+    }
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn coproc_active() -> pid_t {
+    return if sh_coproc.c_flags & COPROC_DEAD as libc::c_int != 0 {
+        NO_PID!()
+    } else {
+        sh_coproc.c_pid
+    };
+}
 
+#[macro_export]
+macro_rules! INVALID_NAMEREF_VALUE {
+    () => {
+        &mut nameref_invalid_value as *mut SHELL_VAR 
+    };
+}
+
+#[macro_export]
+macro_rules! att_nameref {
+    () => {
+        0x0000800
+    };
+}
+
+#[macro_export]
+macro_rules! nameref_p {
+    ($var:expr) => {
+        (*$var).attributes & att_nameref!()
+    };
+}