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[$] Fending off unwanted file descriptors

Thursday June 5, 2025. 03:52 PM , from LWN.net
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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