ksud: dummy mount stdout and stderr

userspace/ksud/src/utils.rs

@@ -8,7 +8,10 @@ use retry::delay::NoDelay;
 use subprocess::Exec;
 
 fn do_mount_image(src: &str, target: &str) -> Result<()> {
-    let result = Exec::shell(format!("mount -t ext4 {} {}", src, target)).join()?;
+    let result = Exec::shell(format!("mount -t ext4 {} {}", src, target))
+        .stdout(subprocess::NullFile)
+        .stderr(subprocess::Redirection::Merge)
+        .join()?;
     ensure!(result.success(), "do mount: {} -> {} failed.", src, target);
     Ok(())
 }
@@ -57,4 +60,4 @@ pub fn get_zip_uncompressed_size(zip_path: &str) -> Result<u64> {
         .map(|i| zip.by_index(i).unwrap().size())
         .sum();
     Ok(total)
-}
+}