This file is indexed.

/etc/xen-tools/role.d/resolv is in xen-tools 4.6.2-1.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

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#!/bin/sh
#
#  This role helps to customize guest's /etc/resolv.conf
#

prefix=$1

#
#  Source our common functions - this will let us install a Debian package.
#
if [ -e /usr/share/xen-tools/common.sh ]; then
    . /usr/share/xen-tools/common.sh
else
    echo "Installation problem"
fi


#
# Log our start
#
logMessage Script $0 starting


#
# WARNING :
#
# resolv.conf is backed up as resolv.conf.old during roles execution to
# permit the chrooted guest to be able to resolve during installation.
# Use resolv.conf.old name during hooks, it will be correctly renamed
# after hooks execution
#

#
# Create Guest's resolv.conf as resolv.conf.old (see WARNING before) :
#
cat <<RESOLV_CONF_EOF >${prefix}/etc/resolv.conf.old
nameserver 192.168.1.1
#search domain.tld
RESOLV_CONF_EOF

#
#  Log our finish
#
logMessage Script $0 finished