From: Alan Cox > Sent: 22 November 2017 16:52 > > On Wed, 22 Nov 2017 09:01:46 +0100 > Salvatore Mesoraca <s.mesoraca16@xxxxxxxxx> wrote: > > > Disallows O_CREAT open missing the O_EXCL flag, in world or > > group writable directories, even if the file doesn't exist yet. > > With few exceptions (e.g. shared lock files based on flock()) > > Enough exceptions to make it a bad idea. > > Firstly if you care this much *stop* having shared writable directories. > We have namespaces, you don't need them. You can give every user their > own /tmp etc. Looks like a very bad idea to me as well. Doesn't this stop all shell redirects into a shared /tmp ? I'm pretty sure most programs use O_CREAT | O_TRUNC for output files - they'll all stop working. If there are some directories where you need to force O_EXCL you need to make it a property of the directory, not the kernel. David
