systemd/test/test-fstab-generator.sh

#!/usr/bin/env bash
# SPDX-License-Identifier: LGPL-2.1-or-later
set -e

if [[ -n "$1" ]]; then
    generator=$1
elif [[ -x /usr/lib/systemd/system-generators/systemd-fstab-generator ]]; then
    generator=/usr/lib/systemd/system-generators/systemd-fstab-generator
elif [[ -x /lib/systemd/system-generators/systemd-fstab-generator ]]; then
    generator=/lib/systemd/system-generators/systemd-fstab-generator
else
    exit 1
fi

src="$(dirname "$0")/testdata/test-fstab-generator"

# fsck(8) is located in /usr/sbin on Debian
PATH=$PATH:/usr/sbin

for f in "$src"/test-*.input; do
    echo "*** Running $f"

    (
        out=$(mktemp --tmpdir --directory "test-fstab-generator.XXXXXXXXXX")
        # shellcheck disable=SC2064
        trap "rm -rf '$out'" EXIT INT QUIT PIPE

        # shellcheck disable=SC2046
        SYSTEMD_LOG_LEVEL=debug SYSTEMD_IN_INITRD=yes SYSTEMD_PROC_CMDLINE="fstab=no $(cat "$f")" $generator "$out" "$out" "$out"

        if [[ -f "$out"/systemd-fsck-root.service ]]; then
            # For split-usr system
            sed -i -e 's:ExecStart=/lib/systemd/systemd-fsck:ExecStart=/usr/lib/systemd/systemd-fsck:' "$out"/systemd-fsck-root.service
        fi

        # We store empty files rather than symlinks, so that they don't get pruned when packaged up, so compare
        # the list of filenames rather than their content
        if ! diff -u <(find "$out" -printf '%P\n' | sort) <(find "${f%.input}.expected" -printf '%P\n' | sort); then
            echo "**** Unexpected output for $f"
            exit 1
        fi
    ) || exit 1
done