def populate_packages(d):
    # Add in the preinst function for ${PN}
    # We have to do this here as prior to this, passwd/group.master
    # would be unavailable. We need to create these files at preinst
    # time before the files from the package may be available, hence
    # storing the data from the files in the preinst directly.

    f = open(d.expand("${STAGING_DATADIR}/base-passwd/passwd.master"), 'r')
    passwd = "".join(f.readlines())
    f.close()
    f = open(d.expand("${STAGING_DATADIR}/base-passwd/group.master"), 'r')
    group = "".join(f.readlines())
    f.close()

    preinst = """#!/bin/sh
mkdir -p $D${sysconfdir}
if [ ! -e $D${sysconfdir}/passwd ]; then
\tcat << 'EOF' > $D${sysconfdir}/passwd
""" + passwd + """EOF
fi
if [ ! -e $D${sysconfdir}/group ]; then
\tcat << 'EOF' > $D${sysconfdir}/group
""" + group + """EOF
fi
"""
    d.setVar(d.expand('pkg_preinst:${PN}'), preinst)
    oe.package.populate_packages(d)

populate_packages(d)