Issue with Permissions Not Applying to All Shared Memory Objects in /dev/shm

[sravaniSam17]

Hello,

I'm facing an issue where my request-reply server-client application does not exchange data when running under different user accounts. To resolve this, I modified the permissions for files in /dev/shm by setting them to 664 instead of the default 644.
fastdds version using is 3.1.0

In particular, I made this change in the set_default() function in permissions.hpp. However, after making this modification, the new permissions (664) are applied only to certain FastDDS files, such as:

• fastdds_a4cd5ceca2ff1f5a(fastdds_xxxxxxxxxx)
• fastdds_port7400(fastdds_portxxxx)

But the permissions are not applied to the following files:

• fastdds_a4cd5ceca2ff1f5a_el(fastdds_xxxxxxxxxx_el)
• fastdds_port7400_sl(fastdds_portxxxx_sl)
• fastdds_port7400_el(fastdds_portxxxx_el)
• sem.fastdds_port7400_mutex(sem.fastdds_portxxx_mutex)

Could you provide guidance on how to ensure that the updated permissions apply to all FastDDS-related files in /dev/shm?

Thanks in advance for your help!