Many functions of configure-layer3 terminate the program after
successful execution, as they were originally only intended for
execution of configure-layer3 commands.
However, some functions are used both for command exection, but also as
helper functions. For example, revert_changes() is used as a helper
function in test_changes(). Terminating the program at the end of the
function therefore ends the exection of test_changes() prematurely. As a
result, the test mode of configure-layer3 never reloads services after
a successful configuration revert.
Replace exit commands with appropriate function return values, which can
then be evaluated by the caller where appropriate.
While at it, add a missing return to the parameter validation in
execute_subshell().
Fixes: #256
Signed-off-by: Fabian Bläse <fabian@blaese.de>
Fabian Bläse