tests: facilitate background process debug in ceph-helpers.sh #12183
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When displaying the output of a background process, do it on stderr so that it is not bufferized. Otherwise the output of the background process may be displayed after it completed. Prefix the output of a background process with the PID of the process known to the parent instead of the PID of the awk process processing the output. When wait_background loops, it will print the process on which it is waiting and it is confusing that they do not match with the PID prefixing the process output. Refs: http://tracker.ceph.com/issues/17830 Signed-off-by: Loic Dachary <loic@dachary.org>
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Nov 25, 2016
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When displaying the output of a background process, do it on stderr so
that it is not bufferized. Otherwise the output of the background
process may be displayed after it completed.
Prefix the output of a background process with the PID of the process
known to the parent instead of the PID of the awk process processing the
output. When wait_background loops, it will print the process on which
it is waiting and it is confusing that they do not match with the PID
prefixing the process output.
Refs: http://tracker.ceph.com/issues/17830
Signed-off-by: Loic Dachary loic@dachary.org