This file is indexed.

postinst is in libapache2-mod-webauth 4.7.0-3build1.

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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#! /bin/sh

set -e

# Make sure that /var/lib/webauth exists and is writable by the www-data
# group, since this is where the keyring and service token cache will go.
if [ ! -d /var/lib/webauth ] ; then
    mkdir /var/lib/webauth
fi
chgrp www-data /var/lib/webauth
chmod 770 /var/lib/webauth

# On upgrade from versions prior to 4.6.0-2, ensure the keyring is owned by
# www-data if it was owned by root.  Earlier versions of WebAuth updated the
# keyring during Apache configuration and therefore created it owned by root,
# but keyring handling is now done in the child processes, so those keyrings
# would no longer be readable.
if [ "$1" = 'configure' ] && [ -f '/var/lib/webauth/keyring' ] ; then
    if [ -n "$2" ] && dpkg --compare-versions "$2" lt 4.6.0-2~ ; then
        if [ "$(stat -c '%U' /var/lib/webauth/keyring)" = 'root' ] ; then
            chown www-data:www-data /var/lib/webauth/keyring
        fi
    fi
fi

# dh_apache2 -e currently doesn't add code to restart Apache when a module
# that isn't enabled by default was enabled and is upgraded.  (#710463)  This
# code is somewhat odd since the cleanest way to restart Apache on upgrade is
# to invoke the enmod action, but we must not do that unless the module is
# already enabled.
if [ -e /usr/share/apache2/apache2-maintscript-helper ] ; then
    . /usr/share/apache2/apache2-maintscript-helper
    if a2query -q -m webauth ; then
        apache2_invoke enmod webauth
    fi
fi



exit 0