diff --git a/_demo/oslookpath/lookpath.go b/_demo/oslookpath/lookpath.go
new file mode 100644
index 00000000..70891f92
--- /dev/null
+++ b/_demo/oslookpath/lookpath.go
@@ -0,0 +1,19 @@
+package main
+
+import (
+	"fmt"
+	"os/exec"
+	"runtime"
+)
+
+func main() {
+	ls := "ls"
+	if runtime.GOOS == "windows" {
+		ls = "dir"
+	}
+	lspath, _ := exec.LookPath(ls)
+	if lspath != "" {
+		ls = lspath
+	}
+	fmt.Println(ls)
+}
diff --git a/c/os/os.go b/c/os/os.go
index 7010df7e..5f36a534 100644
--- a/c/os/os.go
+++ b/c/os/os.go
@@ -24,6 +24,7 @@ import (
 	_ "unsafe"
 
 	"github.com/goplus/llgo/c"
+	"github.com/goplus/llgo/c/syscall"
 )
 
 const (
@@ -40,7 +41,10 @@ type (
 	GidT  C.gid_t
 	OffT  C.off_t
 	DevT  C.dev_t
-	StatT C.struct_stat
+)
+
+type (
+	StatT = syscall.Stat_t
 )
 
 //go:linkname Errno errno
diff --git a/internal/lib/syscall/syscall.go b/internal/lib/syscall/syscall.go
index 6dffaf47..8d733ea8 100644
--- a/internal/lib/syscall/syscall.go
+++ b/internal/lib/syscall/syscall.go
@@ -124,3 +124,21 @@ func Close(fd int) (err error) {
 	}
 	return Errno(os.Errno)
 }
+
+type Stat_t = syscall.Stat_t
+
+func Lstat(path string, stat *Stat_t) (err error) {
+	ret := os.Lstat(c.AllocaCStr(path), stat)
+	if ret == 0 {
+		return nil
+	}
+	return Errno(os.Errno)
+}
+
+func Stat(path string, stat *Stat_t) (err error) {
+	ret := os.Stat(c.AllocaCStr(path), stat)
+	if ret == 0 {
+		return nil
+	}
+	return Errno(os.Errno)
+}