# Copyright 1999-2020 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=6
inherit user versionator

PATCH_VER="0.8"
MY_P="${PN}-$(replace_version_separator 2 'a')"

DESCRIPTION="An ethernet monitor program that keeps track of ethernet/IP address pairings"
HOMEPAGE="https://ee.lbl.gov/"
SRC_URI="
	https://ee.lbl.gov/downloads/arpwatch/${MY_P}.tar.gz
	https://dev.gentoo.org/~jer/arpwatch-patchset-${PATCH_VER}.tar.xz
"

LICENSE="BSD GPL-2"
SLOT="0"
KEYWORDS="amd64 hppa ppc sparc x86"
IUSE="selinux"

DEPEND="
	net-libs/libpcap
	sys-libs/ncurses:*
"
RDEPEND="
	${DEPEND}
	selinux? ( sec-policy/selinux-arpwatch )
"

S="${WORKDIR}/${MY_P}"

pkg_setup() {
	# We need to create /var/lib/arpwatch with this group, so it must
	# exist during src_install.
	enewgroup arpwatch
}

pkg_postinst() {
	# The user, however, is not needed until runtime.
	enewuser arpwatch -1 -1 -1 arpwatch
}

src_prepare() {
	local patchdir="${WORKDIR}/arpwatch-patchset"

	eapply "${patchdir}"/*.patch
	eapply_user

	cp "${patchdir}"/*.8 ./ || die "failed to copy man pages from ${patchdir}"
}

src_install() {
	dosbin arpwatch arpsnmp arp2ethers massagevendor arpfetch bihourly.sh
	doman arpwatch.8 arpsnmp.8 arp2ethers.8 massagevendor.8 arpfetch.8 bihourly.8

	insinto /usr/share/arpwatch
	doins ethercodes.dat

	insinto /usr/share/arpwatch/awk
	doins duplicates.awk euppertolower.awk p.awk e.awk d.awk

	diropts --group=arpwatch --mode=770
	keepdir /var/lib/arpwatch
	dodoc README CHANGES

	newinitd "${FILESDIR}"/arpwatch.initd-r1 arpwatch
	newconfd "${FILESDIR}"/arpwatch.confd-r1 arpwatch
}

pkg_postinst() {
	# Previous revisions installed /var/lib/arpwatch with the wrong
	# ownership. Instead of the intended arpwatch:root, it was left as
	# root:root. If we find any such mis-owned directories, we fix them,
	# and then set the permission bits how we want them in *this*
	# revision.
	#
	# The "--from" flag ensures that we only fix directories that need
	# fixing, and the "&& chmod" ensures that we only adjust the
	# permissions if the owner also needed fixing.
	chown --from=root:root \
		  --no-dereference \
		  :arpwatch \
		  "${ROOT}"/var/lib/arpwatch && \
		chmod 770 "${ROOT}"/var/lib/arpwatch
}