kernel_cmdline: Add Cmdline::new()

This creates an empty, owned ('static) Cmdline.

Signed-off-by: John Eckersberg <[email protected]>

Author: jeckersb

crates/kernel_cmdline/src/bytes.rs

@@ -51,6 +51,13 @@ impl<'a> Iterator for CmdlineIter<'a> {
 }
 
 impl<'a> Cmdline<'a> {
+    /// Creates a new empty owned `Cmdline`.
+    ///
+    /// This is equivalent to `Cmdline::default()` but makes ownership explicit.
+    pub fn new() -> Cmdline<'static> {
+        Cmdline::default()
+    }
+
     /// Reads the kernel command line from `/proc/cmdline`.
     ///
     /// Returns an error if the file cannot be read or if there are I/O issues.
@@ -609,6 +616,16 @@ mod tests {
         assert_eq!(kargs.iter().next(), None);
     }
 
+    #[test]
+    fn test_cmdline_new() {
+        let kargs = Cmdline::new();
+        assert_eq!(kargs.iter().next(), None);
+        assert!(kargs.is_owned());
+
+        // Verify we can store it in a 'static context
+        let _static_kargs: Cmdline<'static> = Cmdline::new();
+    }
+
     #[test]
     fn test_kargs_iter_utf8() {
         let kargs = Cmdline::from(b"foo=bar,bar2 \xff baz=fuz bad=oh\xffno wiz");

crates/kernel_cmdline/src/utf8.rs

@@ -50,6 +50,13 @@ impl<'a> Iterator for CmdlineIter<'a> {
 }
 
 impl<'a> Cmdline<'a> {
+    /// Creates a new empty owned `Cmdline`.
+    ///
+    /// This is equivalent to `Cmdline::default()` but makes ownership explicit.
+    pub fn new() -> Cmdline<'static> {
+        Cmdline::default()
+    }
+
     /// Reads the kernel command line from `/proc/cmdline`.
     ///
     /// Returns an error if:
@@ -550,6 +557,16 @@ mod tests {
         assert_eq!(kargs.iter().next(), None);
     }
 
+    #[test]
+    fn test_cmdline_new() {
+        let kargs = Cmdline::new();
+        assert_eq!(kargs.iter().next(), None);
+        assert!(kargs.is_owned());
+
+        // Verify we can store it in a 'static context
+        let _static_kargs: Cmdline<'static> = Cmdline::new();
+    }
+
     #[test]
     fn test_kargs_simple_from_string() {
         let kargs = Cmdline::from("foo=bar,bar2 baz=fuz wiz".to_string());