# targetcli restoreconfig xxx
Restore file xxx not found
# echo $?
0

An attempt to restore non-existing or unreadable file should return proper error code to be fully usable in scripts. This works as expected when there's a failure with JSON parsing:

# targetcli restoreconfig /etc/fstab
Expecting value: line 1 column 1 (char 0)
# echo $?
1

targetcli-2.1.58-4.fc42.noarch
targetcli-2.1.57-2.el9.noarch