postinst is in tcpcryptd 0.3~rc1-3.
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 | #!/bin/sh -e
VARLIB=/var/lib/tcpcryptd
TCPCRYPT_USER=debian-tcpcryptd
case $1 in
configure)
# add a debian-tcpcryptd user if one does not already exist
if ! getent passwd "$TCPCRYPT_USER" >/dev/null ; then
echo "adding tcpcryptd user..."
adduser --quiet --system --no-create-home --group \
--home "$VARLIB" \
--shell '/bin/false' \
--gecos 'tcpcrypt user,,,' \
"$TCPCRYPT_USER"
fi
mkdir -p "$VARLIB"
chown "$TCPCRYPT_USER" "$VARLIB"
chmod 0700 "$VARLIB"
;;
esac
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