postrm is in c-icap 1:0.3.2-1.
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 32 33 | #! /bin/sh
set -e
# Automatically added by dh_installinit
if [ "$1" = "purge" ] ; then
	update-rc.d c-icap remove >/dev/null
fi
# In case this system is running systemd, we make systemd reload the unit files
# to pick up changes.
if [ -d /run/systemd/system ] ; then
	systemctl --system daemon-reload >/dev/null || true
fi
# End automatically added section
if [ $1 = purge ]; then
    rm -rf /var/run/c-icap
    if [ -x "$(command -v deluser)" ]; then
      deluser --quiet --system c-icap > /dev/null || true
    else
      echo >&2 "not removing c-icap system account because deluser command was not found"
    fi
    if [ -x "$(command -v delgroup)" ]; then
      delgroup --quiet --system c-icap > /dev/null || true
    else
      echo >&2 "not removing c-icap group because delgroup command was not found"
    fi
fi
exit 0
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