postinst is in adduser 3.113+nmu3ubuntu3.
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 34 35 36 37 | #!/bin/sh
set -e
# create an initial adduser configfile if it does not exist yet
if [ ! -e "/etc/adduser.conf" ]; then
cp /usr/share/adduser/adduser.conf /etc/adduser.conf
fi
# modify adduser.conf
if . /usr/share/debconf/confmodule
then
db_get adduser/homedir-changed || RET="false"
if [ "$RET" != "true" ]
then
db_get adduser/homedir-permission || RET="true"
if [ "$RET" = "false" ]
then
NEW_PERMISSION="0751"
else
NEW_PERMISSION="0755"
fi
if grep -q '^DIR_MODE=' /etc/adduser.conf
then
OLD_PERMISSION=$(cat /etc/adduser.conf|sed -ne 's/^DIR_MODE=\([0-9]*\).*$/\1/p')
if [ "$OLD_PERMISSION" != "$NEW_PERMISSION" ]; then
mv /etc/adduser.conf /etc/adduser.conf.dpkg-save
cat /etc/adduser.conf.dpkg-save | \
sed -e "s/^DIR_MODE=.*$/DIR_MODE=$NEW_PERMISSION/" > \
/etc/adduser.conf
fi
else
cp /etc/adduser.conf /etc/adduser.conf.dpkg-save
echo "DIR_MODE=$NEW_PERMISSION" >> /etc/adduser.conf
fi
fi
fi
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