2 files changed, 55 insertions, 0 deletions

diff --git a/bins/ls/Cargo.toml b/bins/ls/Cargo.toml
new file mode 100644
index 0000000..78497bd
--- /dev/null
+++ b/bins/ls/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "ls"
+version.workspace = true
+edition.workspace = true
+[lints]
+workspace = true
+[dependencies]
+rsapi = { path = "../../rsapi" }
diff --git a/bins/ls/src/main.rs b/bins/ls/src/main.rs
new file mode 100644
index 0000000..956bf18
--- /dev/null
+++ b/bins/ls/src/main.rs
@@ -0,0 +1,47 @@
+//! ls — list directory contents via the exports table.
+//!
+//! Args: [path] — defaults to "." (root).
+
+#![no_std]
+#![no_main]
+
+#[panic_handler]
+fn panic(_info: &core::panic::PanicInfo) -> ! {
+    loop { core::hint::spin_loop(); }
+}
+
+fn put(exports: &rsapi::Exports, buf: &[u8]) {
+    (exports.put_line)(rsapi::Line { ptr: buf.as_ptr(), len: buf.len() });
+}
+
+#[unsafe(no_mangle)]
+pub extern "C" fn efi_main(exports: &'static rsapi::Exports, argc: usize, argv: *const rsapi::Arg) -> i32 {
+    let path_str = if argc > 0 {
+        let a = unsafe { &*argv };
+        unsafe { core::str::from_utf8_unchecked(core::slice::from_raw_parts(a.ptr, a.len)) }
+    } else {
+        "/"
+    };
+    let h = (exports.fs_resolve)(rsapi::Line { ptr: path_str.as_ptr(), len: path_str.len() });
+    if h < 0 { return 1; }
+    let mut entry = rsapi::DirEntry {
+        name: rsapi::Line { ptr: core::ptr::null(), len: 0 },
+        is_dir: false,
+        _pad: 0,
+        size: 0,
+    };
+    while (exports.fs_dir_next)(h, &mut entry) {
+        let name = unsafe { core::str::from_utf8_unchecked(core::slice::from_raw_parts(entry.name.ptr, entry.name.len)) };
+        if entry.is_dir {
+            let mut buf = [0u8; 64];
+            let nb = name.as_bytes();
+            buf[..nb.len()].copy_from_slice(nb);
+            buf[nb.len()] = b'/';
+            put(exports, &buf[..nb.len() + 1]);
+        } else {
+            put(exports, name.as_bytes());
+        }
+    }
+    (exports.fs_close)(h);
+    0
+}