#!/bin/sh

set -e

# Alternatively this check can be disabled by preseeding:
#   echo "iproute2/setcaps boolean false" | debconf-set-selections

. /usr/share/debconf/confmodule

case "$1" in
    configure)
        if command -v setcap > /dev/null; then
            db_get iproute2/setcaps

            # Allow dpkg-reconfigure to remove caps
            if test "$RET" = "true"; then
                if ! setcap "cap_dac_override,cap_bpf,cap_net_admin=ep" /bin/ip; then
                   echo "Setcap failed on /bin/ip, ip vrf exec will not be runnable by non-root" >&2
                fi
            else
                # setcap -r fails if the xattr is not present
                if getcap /bin/ip | grep -qs "/bin/ip"; then
                    if ! setcap "-r" /bin/ip; then
                       echo "Setcap -r failed on /bin/ip, could not remove capabilities" >&2
                    fi
                fi
            fi
        fi
    ;;

    abort-upgrade|abort-remove|abort-deconfigure)
    ;;

    *)
        echo "postinst called with unknown argument \`$1'" >&2
        exit 1
    ;;
esac

# dh_installdeb will replace this with shell code automatically
# generated by other debhelper scripts.

#DEBHELPER#

# TODO: drop in forky
if [ "$1" = "configure" ] && [ -n "$2" ] &&  dpkg --compare-versions "$2" lt 6.5.0-4~; then
    # If any of the config files that used to ship in /etc before were modified
    # locally, then try to copy them back as overrides, but don't fail if it
    # cannot be done for any weird reason, as is it not crucial for iproute2's
    # functionality
    for f in /etc/iproute2/group /etc/iproute2/rt_realms /etc/iproute2/rt_scopes /etc/iproute2/rt_tables /etc/iproute2/rt_tables.d/README /etc/iproute2/rt_protos.d/README /etc/iproute2/rt_protos /etc/iproute2/rt_dsfield /etc/iproute2/nl_protos /etc/iproute2/ematch_map /etc/iproute2/bpf_pinning; do
        if [ -f "${f}.dpkg-bak" ]; then
            mv "${f}.dpkg-bak" "${f}" || true
        fi
    done

    if [ -d /etc/iproute2/rt_protos.d/ ]; then
        rmdir --ignore-fail-on-non-empty /etc/iproute2/rt_protos.d
    fi
    if [ -d /etc/iproute2/rt_tables.d/ ]; then
        rmdir --ignore-fail-on-non-empty /etc/iproute2/rt_tables.d
    fi
    if [ -d /etc/iproute2/ ]; then
        rmdir --ignore-fail-on-non-empty /etc/iproute2
    fi
fi

exit 0