diff --git a/_cmptest/readfiledemo/readf.go b/_cmptest/readfiledemo/readf.go
new file mode 100644
index 00000000..7f6c7bb4
--- /dev/null
+++ b/_cmptest/readfiledemo/readf.go
@@ -0,0 +1,25 @@
+package main
+
+import (
+	"fmt"
+	"os"
+)
+
+func main() {
+	fileName := "err.log"
+	os.WriteFile(fileName, []byte("123"), 0644)
+
+	_, err := os.Stat(fileName)
+	if os.IsNotExist(err) {
+		fmt.Fprintf(os.Stderr, "File %s not found\n", fileName)
+		return
+	}
+
+	data, err := os.ReadFile(fileName)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "ReadFile: %v\n", err)
+		return
+	}
+
+	fmt.Printf("%s\n", data)
+}
diff --git a/c/syscall/syscall.go b/c/syscall/syscall.go
index 69b266ec..e9a08e06 100644
--- a/c/syscall/syscall.go
+++ b/c/syscall/syscall.go
@@ -17,7 +17,7 @@
 package syscall
 
 const (
-	LLGoPackage = "decl"
+	LLGoPackage = "noinit"
 )
 
 type Errno = uintptr
@@ -25,3 +25,8 @@ type Errno = uintptr
 // A Signal is a number describing a process signal.
 // It implements the os.Signal interface.
 type Signal = int
+
+// Unix returns the time stored in ts as seconds plus nanoseconds.
+func (ts *Timespec) Unix() (sec int64, nsec int64) {
+	return int64(ts.Sec), int64(ts.Nsec)
+}
diff --git a/internal/lib/os/stat_darwin.go b/internal/lib/os/stat_darwin.go
index 0725f6bb..2f5dc575 100644
--- a/internal/lib/os/stat_darwin.go
+++ b/internal/lib/os/stat_darwin.go
@@ -5,8 +5,9 @@
 package os
 
 import (
-	"syscall"
 	"time"
+
+	"github.com/goplus/llgo/c/syscall"
 )
 
 func fillFileStatFromSys(fs *fileStat, name string) {
diff --git a/internal/lib/os/stat_unix.go b/internal/lib/os/stat_unix.go
index 04ae7304..c0840d31 100644
--- a/internal/lib/os/stat_unix.go
+++ b/internal/lib/os/stat_unix.go
@@ -6,12 +6,15 @@
 
 package os
 
-import "syscall"
+import (
+	"github.com/goplus/llgo/c"
+	"github.com/goplus/llgo/c/os"
+	"github.com/goplus/llgo/internal/lib/syscall"
+)
 
 // Stat returns the FileInfo structure describing file.
 // If there is an error, it will be of type *PathError.
 func (f *File) Stat() (FileInfo, error) {
-	/* TODO(xsw):
 	if f == nil {
 		return nil, ErrInvalid
 	}
@@ -22,8 +25,6 @@ func (f *File) Stat() (FileInfo, error) {
 	}
 	fillFileStatFromSys(&fs, f.name)
 	return &fs, nil
-	*/
-	panic("todo: os.File.Stat")
 }
 
 // statNolog stats a file with no test logging.
diff --git a/internal/lib/os/types_unix.go b/internal/lib/os/types_unix.go
index 1b90a5a1..602eee4c 100644
--- a/internal/lib/os/types_unix.go
+++ b/internal/lib/os/types_unix.go
@@ -7,8 +7,9 @@
 package os
 
 import (
-	"syscall"
 	"time"
+
+	"github.com/goplus/llgo/internal/lib/syscall"
 )
 
 // A fileStat is the implementation of FileInfo returned by Stat and Lstat.