zfs/tests/zfs-tests/tests/functional/cli_user/misc/arc_summary_001_pos.ksh

#! /bin/ksh -p
#
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#
# Copyright (c) 2015 by Lawrence Livermore National Security, LLC.
# All rights reserved.
#

. $STF_SUITE/include/libtest.shlib

log_assert "arc_summary generates output and doesn't return an error code"

# Depending on which version of arc_summary is installed some command
# line options may not be available.  The python3 version includes
# several additional flags.
python3 -V 2>&1 > /dev/null
if (( $? )); then
	# Some systems have Python 3 installed, but only older versions
	# that don't have the subprocess.run() functionality. We catch
	# these with a separate test. Remove this when all systems have
	# reached 3.5 or greater
	VERSIONPYTEST=$(python3 -V)
	if [[ ${VERSIONPYTEST:9:1} -lt 5 ]]; then
		set -A args  "" "-a" "-d" "-p 1"
	else
		set -A args  "" "-a" "-d" "-p 1" "-g" "-s arc" "-r"
	fi
else
	set -A args  "" "-a" "-d" "-p 1"
fi

# Without this, the below checks aren't going to work the way we hope...
set -o pipefail

typeset -i i=0
while [[ $i -lt ${#args[*]} ]]; do
	log_must eval "arc_summary ${args[i]} > /dev/null"
	((i = i + 1))
done

log_must eval "arc_summary | head > /dev/null"
log_must eval "arc_summary | head -1 > /dev/null"

log_pass "arc_summary generates output and doesn't return an error code"