Instead of requiring the user to always specifying a command to launch, default to spawning a shell (/bin/sh) if no command has been specified.
pm-inhibit - Power Management inhibitor
Pm-inhibit is a tool to prevent a computer from going into any kind of
“sleep mode” while a given program is running. It is intended as a
systemd-inhibit, for systems where systemd itself is
not available (e.g., Slackware distributions) but where the desktop
environment provides systemd-compatible DBus services.
pm-inhibit with the name of the program you want to run
unhindered by power management features:
$ pm-inhibit /usr/bin/qjackctl
This will request the inhibition of power management features and start the QjackCtl application. The inhibition will be released when QjackCtl terminates.
Pm-inhibit is distributed under the terms of the GNU General Public License, version 3 or higher. The full license is included in the COPYING file of the source distribution.