1 files changed, 64 insertions, 0 deletions
diff --git a/sys-process/rtirq/rtirq-20220923.ebuild b/sys-process/rtirq/rtirq-20220923.ebuild
new file mode 100644
index 000000000000..6b890d40b8ae
--- /dev/null
+++ b/sys-process/rtirq/rtirq-20220923.ebuild
@@ -0,0 +1,64 @@
+# Copyright 1999-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI="8"
+
+inherit linux-info systemd
+
+DESCRIPTION="Modify realtime scheduling policy and priority of IRQ handlers"
+HOMEPAGE="https://www.rncbc.org/archive/#rtirq"
+SRC_URI="https://www.rncbc.org/archive/${P}.tar.gz
+	https://www.rncbc.org/archive/old/${P}.tar.gz"
+
+LICENSE="GPL-2+"
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+
+RDEPEND="
+	sys-apps/util-linux
+"
+
+src_prepare() {
+	# We install into bin
+	sed -i -e "s:/usr/sbin/rtirq:/usr/bin/rtirq:" ${PN}{,-resume}.service || die
+
+	default
+}
+
+src_install() {
+	newbin rtirq.sh rtirq
+	newinitd "${FILESDIR}"/rtirq.initd rtirq
+	insinto /etc/
+	doins rtirq.conf
+	systemd_dounit rtirq{,-resume}.service
+}
+
+pkg_postinst() {
+	local kconfig_warn=1
+	local cmdline
+	local ver
+
+	if linux-info_get_any_version && linux_config_exists; then
+		if linux_chkconfig_present PREEMPT_RT; then
+			kconfig_warn=0
+		elif linux_chkconfig_present IRQ_FORCED_THREADING; then
+			cmdline=$(< /proc/cmdline) || die
+			[[ ${cmdline} == *threadirqs* ]] && kconfig_warn=0
+		fi
+	fi
+
+	if (( ${kconfig_warn} )); then
+		ewarn "To use rtirq, you need one of the following kernel configurations:"
+		ewarn " - PREEMPT_RT config option enabled (e.g. with sys-kernel/rt-sources);"
+		ewarn " - IRQ_FORCED_THREADING config option enabled and 'threadirqs' option"
+		ewarn "   added to the kernel cmdline."
+	fi
+
+	for ver in ${REPLACING_VERSIONS}; do
+		if ver_test ${ver} -lt "20210329"; then
+			elog "Starting with 20210329 version the config has been moved to '${EROOT}/etc/rtirq.conf'"
+			elog "Please migrate all you setting from '${EROOT}/etc/conf.d/rtirq'"
+			break
+		fi
+	done
+}