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[18627] Note on the usage of SHM with privileged users #497

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Jun 1, 2023
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[18627] Note on the usage of SHM with privileged users #497

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6 changes: 6 additions & 0 deletions docs/fastdds/transport/shared_memory/shared_memory.rst
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Expand Up @@ -68,6 +68,12 @@ DomainParticipants, and the remote
DomainParticipants are able to read it directly using the
shared memory mechanisms.

.. note::

Launching any of the processes with a higher privileged user (for instance, *root*)
can lead to communication problems, as processes run by non-privileged users may
not be able to write into the memory segment.

Every segment has a *segmentId*, a 16 character UUID that uniquely identifies each shared memory segment.
These *segmentIds* are used to identify and access the segment of each DomainParticipant.

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