On Sat, Aug 25, 2018 at 06:51:07AM -0700, Matthew Wilcox wrote: > > Let's go over the properties of a file stream: > > - It has no life independent of the file it's attached to; you can't move > it from one file to another > - If the file is deleted, it is also deleted > - If the file is renamed, it travels with the file > - If the file is copied, the copying program decides whether any named > streams are copied along with it. > - Can be created, deleted. Can be renamed? > - Openable, seekable, cachable > - Does not have sub-streams of its own > - Directories may also have streams which are distinct from the files > in the directory > - Can pipes / sockets / device nodes / symlinks / ... have streams? Unclear. > Probably not useful. Let's *not* make the mistakes Solaris did, and don't allow an fchdirat() into a streams directory. Let's also not allow executing rootkits^H^H^H^H^H^H^H^H binaries as a stream. :-) - Ted
