use generic function to move and rename firecracker kernel

Signed-off-by: JooYoung Park <[email protected]>

scripts/setup/setup.go

@@ -88,7 +88,7 @@ func SetupFirecrackerContainerd() error {
 	if !utils.CheckErrorWithMsg(err, "Failed to download kernel image!\n") {
 		return err
 	}
-	err = utils.CopyKernelToDirAndRename(kernelImgPath, true)
+	err = utils.CopyToDir(kernelImgPath, "/var/lib/firecracker-containerd/runtime/hello-vmlinux.bin", true)
 	if !utils.CheckErrorWithMsg(err, "Failed to copy kernel image!\n") {
 		return err
 	}

scripts/utils/system.go

@@ -183,20 +183,6 @@ func CopyToDir(source string, target string, privileged bool) error {
 	return err
 }
 
-func CopyKernelToDirAndRename(source string, privileged bool) error {
-	var err error
-
-	privilegedCmd := ""
-	if privileged {
-		privilegedCmd = "sudo"
-	}
-	// Copy recursively
-
-	_, err = ExecShellCmd("%s cp -R %s %s", privilegedCmd, source, "/var/lib/firecracker-containerd/runtime/hello-vmlinux.bin")
-
-	return err
-}
-
 // Get kernel version info (equivalent to `uname -r`)
 func GetKernelVersion() (string, error) {
 	kernelVersion, err := ExecShellCmd("uname -r")