hypha: move libraries to libs/

libs/xen/xenstore/examples/list.rs

@@ -0,0 +1,35 @@
+use xenstore::client::{XsdClient, XsdInterface};
+use xenstore::error::Result;
+use xenstore::sys::XSD_ERROR_EINVAL;
+
+fn list_recursive(client: &mut XsdClient, level: usize, path: &str) -> Result<()> {
+    let children = match client.list(path) {
+        Ok(children) => children,
+        Err(error) => {
+            return if error.to_string() == XSD_ERROR_EINVAL.error {
+                Ok(())
+            } else {
+                Err(error)
+            }
+        }
+    };
+
+    for child in children {
+        let full = format!("{}/{}", if path == "/" { "" } else { path }, child);
+        let value = client.read(full.as_str())?;
+        println!(
+            "{}{} = {:?}",
+            " ".repeat(level),
+            child,
+            String::from_utf8(value)?
+        );
+        list_recursive(client, level + 1, full.as_str())?;
+    }
+    Ok(())
+}
+
+fn main() -> Result<()> {
+    let mut client = XsdClient::open()?;
+    list_recursive(&mut client, 0, "/")?;
+    Ok(())
+}