+`LTTNG_UST_APP_PATH`::
+ Path under which unix sockets used for the communication between
+ the application (tracee) instrumented with `liblttng-ust` and the
+ LTTng session and consumer daemons (part of the LTTng-tools project)
+ are located. When `$LTTNG_UST_APP_PATH` is specified, only this path
+ is considered for connecting to a session daemon. The
+ `$LTTNG_UST_APP_PATH` target directory must exist and be accessible
+ by the user before the application is executed for tracing to work.
+ Setting this environment variable disables connection to root and
+ per-user session daemons.
+