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# Copyright 1999-2019 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=6

inherit autotools eutils flag-o-matic pam tmpfiles toolchain-funcs user

DESCRIPTION="screen manager with VT100/ANSI terminal emulation"
HOMEPAGE="https://www.gnu.org/software/screen/"

if [[ "${PV}" != 9999 ]] ; then
	SRC_URI="mirror://gnu/${PN}/${P}.tar.gz"
	KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sh ~sparc ~x86 ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~x86-macos ~sparc-solaris ~sparc64-solaris ~x64-solaris ~x86-solaris"
else
	inherit git-r3
	EGIT_REPO_URI="https://git.savannah.gnu.org/git/screen.git"
	EGIT_CHECKOUT_DIR="${WORKDIR}/${P}" # needed for setting S later on
	S="${WORKDIR}"/${P}/src
fi

LICENSE="GPL-2"
SLOT="0"
IUSE="debug nethack pam selinux multiuser utmp"

CDEPEND="
	>=sys-libs/ncurses-5.2:0=
	pam? ( sys-libs/pam )"
RDEPEND="${CDEPEND}
	selinux? ( sec-policy/selinux-screen )
	utmp? (
		kernel_linux? ( sys-libs/libutempter )
		kernel_FreeBSD? ( || ( >=sys-freebsd/freebsd-lib-9.0 sys-libs/libutempter ) )
	)
"
DEPEND="${CDEPEND}
	sys-apps/texinfo"

RESTRICT="test"

pkg_setup() {
	# Make sure utmp group exists, as it's used later on.
	enewgroup utmp 406
}

src_prepare() {
	default

	# sched.h is a system header and causes problems with some C libraries
	mv sched.h _sched.h || die
	sed -i \
		-e '/include/ s:sched.h:_sched.h:' \
		screen.h winmsg.c canvas.h sched.c || die
	sed -i -e 's:sched.h:_sched.h:g' Makefile.in || die

	# Fix manpage.
	sed -i \
		-e "s:/usr/local/etc/screenrc:${EPREFIX}/etc/screenrc:g" \
		-e "s:/usr/local/screens:${EPREFIX}/tmp/screen:g" \
		-e "s:/local/etc/screenrc:${EPREFIX}/etc/screenrc:g" \
		-e "s:/etc/utmp:${EPREFIX}/var/run/utmp:g" \
		-e 's:/local/screens/S\\-:'"${EPREFIX}"'/tmp/screen/S\\-:g' \
		-e 's:/usr/tmp/screens/:'"${EPREFIX}"'/tmp/screen/:g' \
		doc/screen.1 \
		|| die

	# reconfigure
	eautoreconf
}

src_configure() {
	append-cppflags "-DMAXWIN=${MAX_SCREEN_WINDOWS:-100}"

	[[ ${CHOST} == *-solaris* ]] && append-libs -lsocket -lnsl

	use nethack || append-cppflags "-DNONETHACK"
	use debug && append-cppflags "-DDEBUG"

	econf \
		--enable-socket-dir="${EPREFIX}/tmp/screen" \
		--with-system_screenrc="${EPREFIX}/etc/screenrc" \
		--with-pty-mode=0620 \
		--with-pty-group=5 \
		--enable-telnet \
		$(use_enable pam) \
		$(use_enable utmp)
}

src_compile() {
	LC_ALL=POSIX emake comm.h term.h

	emake -C doc screen.info
	default
}

src_install() {
	local DOCS=(
		README ChangeLog INSTALL TODO NEWS*
		doc/{FAQ,README.DOTSCREEN,fdpat.ps,window_to_display.ps}
	)

	emake DESTDIR="${D}" SCREEN=screen-${PV} install

	local tmpfiles_perms tmpfiles_group

	if use multiuser || use prefix
	then
		fperms 4755 /usr/bin/screen-${PV}
		tmpfiles_perms="0755"
		tmpfiles_group="root"
	else
		fowners root:utmp /usr/bin/screen-${PV}
		fperms 2755 /usr/bin/screen-${PV}
		tmpfiles_perms="0775"
		tmpfiles_group="utmp"
	fi

	newtmpfiles - screen.conf <<<"d /tmp/screen ${tmpfiles_perms} root ${tmpfiles_group}"

	insinto /usr/share/screen
	doins terminfo/{screencap,screeninfo.src}

	insinto /etc
	doins "${FILESDIR}"/screenrc

	pamd_mimic_system screen auth

	dodoc "${DOCS[@]}"
}

pkg_postinst() {
	if [[ -z ${REPLACING_VERSIONS} ]]
	then
		elog "Some dangerous key bindings have been removed or changed to more safe values."
		elog "We enable some xterm hacks in our default screenrc, which might break some"
		elog "applications. Please check /etc/screenrc for information on these changes."
	fi

	# Add /tmp/screen in case it doesn't exist yet. This should solve
	# problems like bug #508634 where tmpfiles.d isn't in effect.
	local rundir="${EROOT%/}/tmp/screen"
	if [[ ! -d ${rundir} ]] ; then
		if use multiuser || use prefix ; then
			tmpfiles_group="root"
		else
			tmpfiles_group="utmp"
		fi
		mkdir -m 0775 "${rundir}"
		chgrp ${tmpfiles_group} "${rundir}"
	fi

	ewarn "This revision changes the screen socket location to ${rundir}"
}