diff --git a/proc.c.v b/proc.c.v
index 88e49f1..a410d9a 100644
--- a/proc.c.v
+++ b/proc.c.v
@@ -76,20 +76,19 @@ pub fn (s ProcessState) str() string {
 			sig_str := os.sigint_to_signal_name(sig)
 			str = 'signal: ${sig} (${sig_str})'
 		}
-		// s.status.stopped() {
-		// 	str = 'stop signal: ${s.status.stop_signal()}'
-		// }
-		// s.status.continued() {
-		// 	str = 'continued'
-		// }
+		s.status.stopped() {
+			str = 'stop signal: ${s.status.stop_signal()}'
+		}
+		s.status.continued() {
+			str = 'continued'
+		}
 		else {
 			str = 'unknown'
 		}
 	}
-
-	// if s.status.coredump() {
-	// 	str += ' (core dumped)'
-	// }
+	if s.status.coredump() {
+		str += ' (core dumped)'
+	}
 	return str
 }
 
diff --git a/wait.c.v b/wait.c.v
index 762d800..e4f6f81 100644
--- a/wait.c.v
+++ b/wait.c.v
@@ -1,15 +1,19 @@
 module runcmd
 
-// fn C.WIFSTOPPED(i32) bool
+@[trusted]
+fn C.WIFSTOPPED(int) bool
 
-// fn C.WCOREDUMP(i32) bool
+@[trusted]
+fn C.WCOREDUMP(int) bool
 
-// fn C.WIFCONTINUED(i32) bool
+@[trusted]
+fn C.WIFCONTINUED(int) bool
 
-// fn C.WSTOPSIG(i32) int
+@[trusted]
+fn C.WSTOPSIG(int) int
 
 // WaitStatus stores the result value of [wait(2)](https://www.man7.org/linux/man-pages/man2/wait.2.html) syscall.
-pub type WaitStatus = int
+pub type WaitStatus = u32
 
 // exited returns true if process is exited.
 pub fn (w WaitStatus) exited() bool {
@@ -37,29 +41,29 @@ pub fn (w WaitStatus) term_signal() int {
 	return -1
 }
 
-// // stopped returns true if the child process was stopped by delivery of a signal.
-// pub fn (w WaitStatus) stopped() bool {
-// 	return C.WIFSTOPPED(w)
-// }
+// stopped returns true if the child process was stopped by delivery of a signal.
+pub fn (w WaitStatus) stopped() bool {
+	return C.WIFSTOPPED(w)
+}
 
-// // stop_signal returns the number of the signal which caused the child to stop.
-// pub fn (w WaitStatus) stop_signal() int {
-// 	if w.stopped() {
-// 		return C.WSTOPSIG(w)
-// 	}
-// 	return -1
-// }
+// stop_signal returns the number of the signal which caused the child to stop.
+pub fn (w WaitStatus) stop_signal() int {
+	if w.stopped() {
+		return C.WSTOPSIG(w)
+	}
+	return -1
+}
 
-// // continued returns true if the child process was resumed by delivery of SIGCONT.
-// pub fn (w WaitStatus) continued() bool {
-// 	return C.WIFCONTINUED(w)
-// }
+// continued returns true if the child process was resumed by delivery of SIGCONT.
+pub fn (w WaitStatus) continued() bool {
+	return C.WIFCONTINUED(w)
+}
 
-// // coredump returns true if the child produced a core dump.
-// // See [core(5)](https://man7.org/linux/man-pages/man5/core.5.html).
-// pub fn (w WaitStatus) coredump() bool {
-// 	if w.signaled() {
-// 		return C.WCOREDUMP(w)
-// 	}
-// 	return false
-// }
+// coredump returns true if the child produced a core dump.
+// See [core(5)](https://man7.org/linux/man-pages/man5/core.5.html).
+pub fn (w WaitStatus) coredump() bool {
+	if w.signaled() {
+		return C.WCOREDUMP(w)
+	}
+	return false
+}