ksud: Add command to shrink image

userspace/ksud/src/cli.rs

@@ -172,6 +172,9 @@ enum Module {
 
     /// list all modules
     List,
+
+    /// Shrink module image size
+    Shrink,
 }
 
 #[derive(clap::Subcommand, Debug)]
@@ -251,6 +254,7 @@ pub fn run() -> Result<()> {
                 Module::Enable { id } => module::enable_module(&id),
                 Module::Disable { id } => module::disable_module(&id),
                 Module::List => module::list_modules(),
+                Module::Shrink => module::shrink_image(),
             }
         }
         Commands::Install => event::install(),

userspace/ksud/src/module.rs

@@ -673,3 +673,12 @@ pub fn list_modules() -> Result<()> {
     println!("{}", serde_json::to_string_pretty(&modules)?);
     Ok(())
 }
+
+pub fn shrink_image() -> Result<()> {
+    Command::new("resize2fs")
+        .arg("-M")
+        .arg(defs::MODULE_IMG)
+        .stdout(Stdio::piped())
+        .status()?;
+    Ok(())
+}