Adapt adapts the input to api.FS unless it is already one.

Chown is like os.Chown, except it returns a syscall.Errno, not a fs.PathError.

Lchown is like os.Lchown, except it returns a syscall.Errno, not a fs.PathError.

NewReadFS is used to mask an existing api.FS for reads.

Utimens set file access and modification times on a path resolved to the current working directory, at nanosecond precision.

UTIME_NOW is a special syscall.Timespec NSec value used to set the file's timestamp to a value close to, but not greater than the current system time.

UTIME_OMIT is a special syscall.Timespec NSec value used to avoid setting the file's timestamp.