/etc/acpi/events/asus-media-eject is in acpi-support 0.142-6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | # /etc/acpi/events/asus-media-eject
# This is called when the user presses the eject media button and calls
# /etc/acpi/media.sh for further processing.
event=hotkey (ATKD|HOTK) 0000004c
action=/etc/acpi/ejectbtn.sh
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