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fix SgxFile read/write empty buffer

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This commit is contained in:
WangRunji 2019-04-13 21:03:10 +08:00
parent d19676032d
commit 4811044c14
1 changed files with 6 additions and 0 deletions
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6
src/libos/src/fs/sgx_impl.rs
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@ -64,6 +64,9 @@ unsafe impl Sync for LockedFile {}
impl File for LockedFile { impl File for LockedFile {
fn read_at(&self, buf: &mut [u8], offset: usize) -> DevResult<usize> { fn read_at(&self, buf: &mut [u8], offset: usize) -> DevResult<usize> {
if buf.len() == 0 {
return Ok(0);
}
let mut file = self.0.lock().unwrap(); let mut file = self.0.lock().unwrap();
let offset = offset as u64; let offset = offset as u64;
file.seek(SeekFrom::Start(offset)) file.seek(SeekFrom::Start(offset))
@ -73,6 +76,9 @@ impl File for LockedFile {
} }
fn write_at(&self, buf: &[u8], offset: usize) -> DevResult<usize> { fn write_at(&self, buf: &[u8], offset: usize) -> DevResult<usize> {
if buf.len() == 0 {
return Ok(0);
}
let mut file = self.0.lock().unwrap(); let mut file = self.0.lock().unwrap();
let offset = offset as u64; let offset = offset as u64;
file.seek(SeekFrom::Start(offset)) file.seek(SeekFrom::Start(offset))