kmc-solid: Use the filesystem thread-safety wrapper

library/std/src/sys/solid/fs.rs

@@ -289,7 +289,26 @@ impl OpenOptions {
 }
 
 fn cstr(path: &Path) -> io::Result<CString> {
- Ok(CString::new(path.as_os_str().as_bytes())?)
+ let path = path.as_os_str().as_bytes();
+
+ if !path.starts_with(br"\") {
+ // Relative paths aren't supported
+ return Err(crate::io::const_io_error!(
+ crate::io::ErrorKind::Unsupported,
+ "relative path is not supported on this platform",
+ ));
+ }
+
+ // Apply the thread-safety wrapper
+ const SAFE_PREFIX: &[u8] = br"\TS";
+ let wrapped_path = [SAFE_PREFIX, &path, &[0]].concat();
+
+ CString::from_vec_with_nul(wrapped_path).map_err(|_| {
+ crate::io::const_io_error!(
+ io::ErrorKind::InvalidInput,
+ "path provided contains a nul byte",
+ )
+ })
 }
 
 impl File {