postinst is in barbican-common 1:2.0.0-0ubuntu1.
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 | #!/bin/sh -e
if [ "$1" = "configure" ]; then
if ! getent group barbican > /dev/null 2>&1; then
addgroup --system barbican >/dev/null
fi
if ! getent passwd barbican > /dev/null 2>&1; then
adduser --system --home /var/lib/barbican --ingroup barbican --no-create-home --shell /bin/false barbican
fi
chown -R barbican:adm /var/log/barbican
chmod 0750 /var/log/barbican
chown -R barbican:barbican /var/lib/barbican /etc/barbican
mkdir -p /var/lib/barbican
chown barbican:barbican /var/lib/barbican
fi
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