Equivalent of /dev/mqueue to enumerate SysV message queues Linux supports two kinds of message queues: POSIX (i.e., those created by `mq_open`), and System V (i.e., those created by `msgget`). For POSIX message queues, `mq_overview(7)` documents that you can enumerate them via the `mqueue` virtual filesystem, usually mounted at `/dev/mqueue`. However, System V message queues don't show up there. How can I enumerate them?

The `proc` virtual filesystem holds this information: `/proc/sysvipc/msg` is a file containing a list of all System V message queues. The `ipcs` program uses this file and shows you the same information, but in a more human-readable format.