preinst is in mailavenger 0.8.4-2.
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 | #!/bin/sh
set -e
DATADIR=/var/lib/mailavenger
if ! getent passwd avenger >/dev/null; then
# Adding system user: avenger.
adduser \
--system \
--disabled-login \
--ingroup nogroup \
--home $DATADIR \
--gecos "MailAvenger non-smtp user" \
--shell /usr/sbin/nologin \
avenger >/dev/null
fi
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