I've just realized that in 9P the wstat would refuse to rename an entry if a target name already exists.
So how can I atomically replace one file with another one, so that during the operation clients opening it would not fail? In POSIX rename gives you such an atomicity: ----------------------------------------------------------------------- If the old argument points to the pathname of a file that is not a directory, the new argument shall not point to the pathname of a directory. If the link named by the new argument exists, it shall be removed and old renamed to new. In this case, a link named new shall remain visible to other processes throughout the renaming operation and refer either to the file referred to by new or old before the operation began. ------------------------------------------------------------------------ How can I achieve the same result with 9P? Thanks, Roman.
