postinst is in cron 3.0pl1-127+deb8u1.
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
crondir="/var/spool/cron"
action="$1"
if [ "$action" != configure ]; then
exit 0
fi
# LEGACY: This hasn't been relevant to Debian cron since the last Millenium,
# but we keep it here to preserve the upgrade path...
# Copy existing allow/deny files
pausemessage="F"
for fname in allow deny ; do
if [ -f $crondir/$fname ] ; then
if [ ! -f $/etc/cron.$fname ] ; then
mv $crondir/$fname /etc/cron.$fname
echo " "
echo "Moving $crondir/$fname to /etc/cron.$fname to comply with Debian policy"
pausemessage="T"
else
echo " "
echo "Warning:"
echo "Both $crondir/$fname and /etc/cron.$fname exist -- cron will"
echo "use /etc/cron.$fname"
pausemessage="T"
fi
fi
done
# Conffiles that are now obsolete
dpkg-maintscript-helper rm_conffile /etc/cron.monthly/standard "3.0pl1-113" -- "$@"
dpkg-maintscript-helper rm_conffile /etc/cron.daily/standard "3.0pl1-124" -- "$@"
# If dpkg-maintscript-helper renames it instead of removing it because it has
# local modifications, we must rename it back to a valid name, or crond
# will not accept it. Thanks to Raphaël Hertzog for the tip.
if [ -e /etc/cron.monthly/standard.dpkg-bak ]; then
mv /etc/cron.monthly/standard.dpkg-bak \
/etc/cron.monthly/standard-obsolete-please-verify-and-remove
fi
# Add group for crontabs
getent group crontab > /dev/null 2>&1 || addgroup --system crontab
# Fixup crontab binary for new group 'crontab'.
if ! dpkg-statoverride --list /usr/bin/crontab > /dev/null ; then
dpkg-statoverride --update --add root crontab 2755 /usr/bin/crontab
fi
# Fixup crontab , directory and files for new group 'crontab'.
# Can't use dpkg-statoverride for this because it doesn't cooperate nicely
# with cron alternatives such as bcron
if [ -d $crondir/crontabs ] ; then
chown root:crontab $crondir/crontabs
chmod 1730 $crondir/crontabs
# This used to be done conditionally. For versions prior to "3.0pl1-81"
# It has been disabled to suit cron alternative such as bcron.
cd $crondir/crontabs
set +e
ls -1 | xargs -r -n 1 --replace=xxx chown 'xxx:crontab' 'xxx'
ls -1 | xargs -r -n 1 chmod 600
set -e
fi
# Automatically added by dh_systemd_enable
# This will only remove masks created by d-s-h on package removal.
deb-systemd-helper unmask cron.service >/dev/null || true
# was-enabled defaults to true, so new installations run enable.
if deb-systemd-helper --quiet was-enabled cron.service; then
# Enables the unit on first installation, creates new
# symlinks on upgrades if the unit file has changed.
deb-systemd-helper enable cron.service >/dev/null || true
else
# Update the statefile to add new symlinks (if any), which need to be
# cleaned up on purge. Also remove old symlinks.
deb-systemd-helper update-state cron.service >/dev/null || true
fi
# End automatically added section
# Automatically added by dh_installinit
if [ -x "/etc/init.d/cron" ]; then
update-rc.d cron start 89 2 3 4 5 . >/dev/null
invoke-rc.d cron start || exit $?
fi
# End automatically added section
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