Fix clippy errors.

Signed-off-by: lucasliang <[email protected]>

src/env/log_fd/unix.rs

@@ -83,7 +83,7 @@ impl LogFd {
         while readed < buf.len() {
             let bytes = match pread(self.0, &mut buf[readed..], offset as i64) {
                 Ok(bytes) => bytes,
-                Err(e) if e == Errno::EINTR => continue,
+                Err(Errno::EINTR) => continue,
                 Err(e) => return Err(from_nix_error(e, "pread")),
             };
             // EOF
@@ -106,7 +106,7 @@ impl LogFd {
         while written < content.len() {
             let bytes = match pwrite(self.0, &content[written..], offset as i64) {
                 Ok(bytes) => bytes,
-                Err(e) if e == Errno::EINTR => continue,
+                Err(Errno::EINTR) => continue,
                 Err(e) if e == Errno::ENOSPC => return Err(from_nix_error(e, "nospace")),
                 Err(e) => return Err(from_nix_error(e, "pwrite")),
             };

src/file_pipe_log/pipe.rs

@@ -713,7 +713,7 @@ mod tests {
         // Retire files.
         assert_eq!(pipe_log.purge_to(last).unwrap() as u64, last - first);
         // Try to read recycled file.
-        for (_, handle) in handles.into_iter().enumerate() {
+        for handle in handles.into_iter() {
             assert!(pipe_log.read_bytes(handle).is_err());
         }
         // Try to reuse.

src/swappy_allocator.rs

@@ -288,6 +288,7 @@ impl Page {
             .read(true)
             .write(true)
             .create(true)
+            .truncate(true)
             .open(path)
             .map_err(|e| error!("Failed to open swap file: {e}"))
             .ok()?;