postinst is in sudo 1.8.21p2-3ubuntu1.
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.
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set -e
# remove old link
if [ -L /etc/alternatives/sudo ]; then
rm /etc/alternatives/sudo
fi
# remove legacy conffile no longer delivered
if [ -f /etc/sudoers.dist ]; then
rm /etc/sudoers.dist
fi
# complain if no sudoers file is present
if [ ! -f /etc/sudoers ];then
echo "WARNING: /etc/sudoers not present!";
fi
# make sure sudoers has the correct permissions and owner/group
if [ -f /etc/sudoers ];then
chown root:root /etc/sudoers
chmod 440 /etc/sudoers
fi
# if we've gotten this far .. remove the saved, unchanged old sudoers file
rm -f /etc/sudoers.pre-conffile
# make sure we have a sudo group
[ -n "`getent group sudo`" ] && exit 0 # we're finished if there is a group sudo:
# start search with gid 27
gid="27"
while [ -n "`getent group $gid | cut -d: -f3`" ];do
gid=`expr $gid + 1`
done
if [ "$gid" -ne "27" ];then
echo "On Debian we normally use gid 27 for 'sudo'."
gname="`getent group 27 | cut -d: -f1`"
echo "However, on your system gid 27 is group '$gname'."
echo ""
echo "Would you like me to stop configuring sudo so that you can change this?";
while true;do
echo -n "(Enter 'yes' to stop, enter to continue): "
read ans
[ "$ans" = "" ] && break
if [ "$ans" = "yes" -o "$ans" = "YES" ];then
echo "'dpkg --pending --configure' will restart the configuration."
exit 1;
fi
echo "Please enter exactly 'yes' to stop, or press the enter key to continue without stopping"
done
fi
echo "Creating group 'sudo' with gid = $gid";
groupadd -g $gid sudo
echo ""
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