608bfe76c1
Set the $REMOTE_ADDR environment variable for AF_UNIX socket connections when using per-connection socket activation (Accept=yes). $REMOTE_ADDR will now contain the remote socket's file system path (starting with a slash "/") or its address in the abstract namespace (starting with an at symbol "@"). This information is essential for identifying the remote peer in AF_UNIX socket connections, but it's not easy to obtain in a shell script for example without pulling in a ton of additional tools. By setting $REMOTE_ADDR, we make this information readily available to the activated service.
System and Service Manager
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