Re: [DNG] "post mortem" (was: Popcorn)
On Sunday 20 February 2022 at 12:57:07, Florian Zieboll via Dng wrote: > Dear list, > > I just want to share the two most important things I learned yesterday: > > 1.) I can "delete" files for which I do not have write permissions, if > the containing directory is writable by me: Indeed - this came as a surprise to me when I first found it. The explanation is remarkably simple: Write permissions on a *file* determine whether you can modify the *content* of the file. This has nothing to do with the *file name* (renaming or deleting). Write permissions on *the containing directory* determine whether you can delete or rename files in that contained directory. This is because a directory is essentially a file with a special type of content - names and pointers to other files (inodes). Antony. -- In the Beginning there was nothing, which exploded. - Terry Pratchett Please reply to the list; please *don't* CC me. ___ Dng mailing list Dng@lists.dyne.org https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/dng
[DNG] "post mortem" (was: Popcorn)
Dear list, I just want to share the two most important things I learned yesterday: 1.) I can "delete" files for which I do not have write permissions, if the containing directory is writable by me: || The system deletes files automatically when their reference || counts drops to zero. The owner of the file doesn't matter. https://superuser.com/questions/369493/ 2.) On logout, the user's processes are not terminated because they had been spawned from a common "ancestor" process, but because they have a common "session id" (SID). As I have not been able to find a detailed documentation of what's happening on quitting a session, I think about writing a summary of the related mechanisms in the pre-systemd world. Thus, I'd like to ask you for hints about related resources, also regarding the "backgrounding" and "detaching" of processes Thank you and libre Grüße, Florian ___ Dng mailing list Dng@lists.dyne.org https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/dng
