Implement more of fs

Signed-off-by: Ayush Singh <[email protected]>

library/std/src/os/uefi/path.rs

@@ -4,9 +4,18 @@ use crate::ffi::OsStr;
 use crate::io;
 use crate::path::{Path, PathBuf};
 use crate::ptr::NonNull;
-use crate::sys_common::ucs2;
+use crate::sys_common::{ucs2, AsInner};
 use r_efi::protocols::{device_path, device_path_from_text, device_path_to_text};
 
+#[unstable(feature = "uefi_std", issue = "none")]
+impl TryFrom<&DevicePath> for PathBuf {
+    type Error = crate::io::Error;
+
+    fn try_from(value: &DevicePath) -> Result<Self, Self::Error> {
+        PathBuf::try_from(*value.as_inner())
+    }
+}
+
 #[unstable(feature = "uefi_std", issue = "none")]
 impl TryFrom<NonNull<device_path::Protocol>> for PathBuf {
     type Error = crate::io::Error;

library/std/src/os/uefi/raw.rs

@@ -5,6 +5,7 @@ pub use r_efi::efi::{BootServices, RuntimeServices, SystemTable};
 use crate::alloc::{Allocator, Global, Layout};
 use crate::io;
 use crate::ptr::NonNull;
+use crate::sys_common::AsInner;
 
 // A type to make working with Variable Sized Types easier
 pub(crate) struct VariableSizeType<T> {
@@ -43,6 +44,12 @@ impl<T> VariableSizeType<T> {
     }
 }
 
+impl<T> AsInner<NonNull<T>> for VariableSizeType<T> {
+    fn as_inner(&self) -> &NonNull<T> {
+        &self.inner
+    }
+}
+
 impl<T> Drop for VariableSizeType<T> {
     fn drop(&mut self) {
         unsafe { Global.deallocate(self.inner.cast(), self.layout) }