postinst is in dpkg-www 2.54+nmu1.
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 38 39 | #!/bin/sh
set -e
case "$1" in
    configure)
	;;
    abort-upgrade|abort-remove|abort-deconfigure)
	exit 0
	;;
    *)
        echo "postinst called with unknown argument \`$1'" >&2
	exit 1
	;;
esac
for server in apache2 apache apache-ssl; do
    apachectl="/usr/sbin/${server}ctl"
    apachepid="/var/run/${server}.pid"
    if [ -x $apachectl -a -f $apachepid ]; then
	echo "Restarting $server..." >&2
	$apachectl restart >&2 </dev/null || true
    fi
done
# Automatically added by dh_installmenu
if [ "$1" = "configure" ] && [ -x "`which update-menus 2>/dev/null`" ]; then
	update-menus
fi
# End automatically added section
# Automatically added by dh_installmime
if [ "$1" = "configure" ] && [ -x "`which update-mime 2>/dev/null`" ]; then
	update-mime
fi
# End automatically added section
exit 0
# end of file
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