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systemd/tools/check-help.sh
Zbigniew Jędrzejewski-Szmek 9ee03516df tree-wide: add spdx header on all scripts and helpers
Even though many of those scripts are very simple, it is easier to include
the header than to try to say whether each of those files is trivial enough
not to require one.
2021-01-28 09:55:35 +01:00

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#!/bin/sh
# SPDX-License-Identifier: LGPL-2.1-or-later
set -eu
export SYSTEMD_LOG_LEVEL=info
# output width
if "$1" --help | grep -v 'default:' | grep -E -q '.{80}.'; then
echo "$(basename "$1") --help output is too wide:"
"$1" --help | awk 'length > 80' | grep -E --color=yes '.{80}'
exit 1
fi
# --help prints something. Also catches case where args are ignored.
if ! "$1" --help | grep -q .; then
echo "$(basename "$1") --help output is empty."
exit 2
fi
# no --help output to stdout
if "$1" --help 2>&1 1>/dev/null | grep .; then
echo "$(basename "$1") --help prints to stderr"
exit 3
fi
# error output to stderr
if ! "$1" --no-such-parameter 2>&1 1>/dev/null | grep -q .; then
echo "$(basename "$1") with an unknown parameter does not print to stderr"
exit 4
fi