From 6eac0a95ec07ee675e539a159964b22a08daf670 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Thu, 4 Sep 2025 07:40:47 +0000
Subject: [PATCH] Fix OneDrive casefold crash by handling long paths in
 GetFinalPathNameByHandleW

Co-authored-by: sxyazi <17523360+sxyazi@users.noreply.github.com>
---
 yazi-fs/src/provider/local/casefold.rs | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/yazi-fs/src/provider/local/casefold.rs b/yazi-fs/src/provider/local/casefold.rs
index 6b70ef5f..f90e3e8e 100644
--- a/yazi-fs/src/provider/local/casefold.rs
+++ b/yazi-fs/src/provider/local/casefold.rs
@@ -148,6 +148,28 @@ fn final_path(path: &Path) -> io::Result<PathBuf> {
 
 	if len == 0 {
 		Err(io::Error::last_os_error())
+	} else if len as usize > buf.len() {
+		// Buffer too small, allocate a larger buffer and retry
+		let mut large_buf = vec![0u16; len as usize];
+		let new_len = unsafe {
+			GetFinalPathNameByHandleW(
+				file.as_raw_handle() as HANDLE,
+				large_buf.as_mut_ptr(),
+				large_buf.len() as u32,
+				VOLUME_NAME_DOS,
+			)
+		};
+		
+		if new_len == 0 {
+			Err(io::Error::last_os_error())
+		} else if new_len as usize > large_buf.len() {
+			// Still too large, give up
+			Err(io::Error::new(io::ErrorKind::InvalidInput, "Path too long"))
+		} else if large_buf.starts_with(&[92, 92, 63, 92]) {
+			Ok(PathBuf::from(OsString::from_wide(&large_buf[4..new_len as usize])))
+		} else {
+			Ok(PathBuf::from(OsString::from_wide(&large_buf[0..new_len as usize])))
+		}
 	} else if buf.starts_with(&[92, 92, 63, 92]) {
 		Ok(PathBuf::from(OsString::from_wide(&buf[4..len as usize])))
 	} else {