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Add struct Path for VFS

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Signed-off-by: Zhenchen Wang <m202372036@hust.edu.cn>
This commit is contained in:
plucky
2024-04-09 09:30:58 +08:00
committed by Tate, Hongliang Tian
parent bc1bf4cb53
commit 6d486c6c01
39 changed files with 561 additions and 447 deletions
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14
kernel/aster-nix/src/syscall/truncate.rs
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@ -28,21 +28,21 @@ pub fn sys_ftruncate(fd: FileDesc, len: isize) -> Result<SyscallReturn> {
pub fn sys_truncate(path_ptr: Vaddr, len: isize) -> Result<SyscallReturn> {
log_syscall_entry!(SYS_TRUNCATE);
let path = read_cstring_from_user(path_ptr, PATH_MAX)?;
debug!("path = {:?}, length = {}", path, len);
let pathname = read_cstring_from_user(path_ptr, PATH_MAX)?;
debug!("pathname = {:?}, length = {}", pathname, len);
check_length(len)?;
let current = current!();
let dentry = {
let path = path.to_string_lossy();
if path.is_empty() {
let path = {
let pathname = pathname.to_string_lossy();
if pathname.is_empty() {
return_errno_with_message!(Errno::ENOENT, "path is empty");
}
let fs_path = FsPath::new(AT_FDCWD, path.as_ref())?;
let fs_path = FsPath::new(AT_FDCWD, pathname.as_ref())?;
current.fs().read().lookup(&fs_path)?
};
dentry.resize(len as usize)?;
path.dentry().resize(len as usize)?;
Ok(SyscallReturn::Return(0))
}