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Fix the fstatat syscall with empty filename

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LI Qing 2023-12-06 14:53:46 +08:00 committed by Tate, Hongliang Tian
parent 729c6ecd0c
commit e0d7b140ce
1 changed files with 9 additions and 3 deletions
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12
services/aster-nix/src/syscall/stat.rs
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@ -53,12 +53,18 @@ pub fn sys_fstatat(
"dirfd = {}, filename = {:?}, stat_buf_ptr = 0x{:x}, flags = {:?}",
dirfd, filename, stat_buf_ptr, flags
);
if filename.is_empty() {
if !flags.contains(StatFlags::AT_EMPTY_PATH) {
return_errno_with_message!(Errno::ENOENT, "path is empty");
}
// In this case, the behavior of fstatat() is similar to that of fstat().
return self::sys_fstat(dirfd, stat_buf_ptr);
}
let current = current!();
let dentry = {
let filename = filename.to_string_lossy();
if filename.is_empty() && !flags.contains(StatFlags::AT_EMPTY_PATH) {
return_errno_with_message!(Errno::ENOENT, "path is empty");
}
let fs_path = FsPath::new(dirfd, filename.as_ref())?;
let fs = current.fs().read();
if flags.contains(StatFlags::AT_SYMLINK_NOFOLLOW) {