diff --git a/sigchld_unix.go b/sigchld_unix.go
new file mode 100644
index 0000000..24ef95e
--- /dev/null
+++ b/sigchld_unix.go
@@ -0,0 +1,28 @@
+// +build linux darwin
+
+package main
+
+import (
+	"syscall"
+
+	"github.com/qiniu/log"
+)
+
+func init() {
+	go reapChildren()
+}
+
+func reapChildren() {
+	var wstatus syscall.WaitStatus
+
+	for {
+		pid, err := syscall.Wait4(-1, &wstatus, 0, nil)
+		for err == syscall.EINTR {
+			pid, err = syscall.Wait4(-1, &wstatus, 0, nil)
+		}
+		if err == syscall.ECHILD {
+			break
+		}
+		log.Printf("pid %d, finished, wstatus: %+v", pid, wstatus)
+	}
+}