Instead of doing some OS-specific magic to detect if the
spdk app has already initialized, just try to send it an
RPC. This serves mostly as cleanup, but also simplifies
test output in cases where the spdk app could not be fully
initialized. Previous waitforlisten implementation would
return as soon as the rpc subsystem was initialized, but
the app could have still failed on e.g. bdev initialization
later on. Since waitforlisten() returned success, the
script could continue its execution and try to execute
some RPCs. The logs from the SPDK app and the bash script
could easily mix, rendering the entire output not so clear
to the user.
To fix it, just try to send some RPC commands inside
waitforlisten().
Change-Id: I33eaf362e3cc645f8ea3ee22fd48db1643442129
Signed-off-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/457562
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
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