Subj : [$] Fending off unwanted file descriptors
To   : All
From : LWN.net
Date : Fri Jun 06 2025 06:40:08

One of the more obscure features provided by Unix-domain sockets is the
ability to pass a file descriptor from one process to another.  This
feature is often used to provide access to a specific file or network
connection to a process running in a relatively unprivileged context.  But
what if the recipient doesn't want a new file descriptor?  A feature
added for the 6.16 release makes it possible to refuse that offer.

https://lwn.net/Articles/1023085/
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