postinst is in btrfs-tools 3.12-1.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 | #!/bin/sh
set -e
case "${1}" in
	configure)
		if [ -x /usr/sbin/update-initramfs ] && [ -e /etc/initramfs-tools/initramfs.conf ]
		then
			update-initramfs -u
		fi
		rm -f /etc/default/grub.d/50_btrfs_enable_fastboot.cfg
		;;
	abort-upgrade|abort-remove|abort-deconfigure)
		;;
	*)
		echo "postinst called with unknown argument \`${1}'" >&2
		exit 1
		;;
esac
# Automatically added by dh_makeshlibs
if [ "$1" = "configure" ]; then
	ldconfig
fi
# End automatically added section
exit 0
 |