add openrc support for osi-shell, build an openrc base imageHEADmaster

1 files changed, 35 insertions, 0 deletions

diff --git a/osi-mk.d/openrc-osi-shell.sh b/osi-mk.d/openrc-osi-shell.sh
new file mode 100644
index 0000000..654cc31
--- /dev/null
+++ b/osi-mk.d/openrc-osi-shell.sh
@@ -0,0 +1,35 @@
+#!/hint/bash -euE
+# Copyright (C) 2018  Luke Shumaker
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+post_install+=(10:openrc-osi-shell:post_install)
+openrc-osi-shell:post_install() {
+	local arg_mountpoint=$1
+
+	install -Dm755 /dev/stdin "${arg_mountpoint}/etc/osi-shell" <<-'EOT'
+		#!/bin/sh
+		# We can't use login(1) because it masks the exit status of the shell,
+		# but we want this to be a real local login with PAM, so use su(1),
+		# but trick in in to using login(1)'s PAM config.  We undo this trick by
+		# using nsenter(1) to reset the mount namespace after we've done the PAM stuff.
+		# This hardcodes the shell as /bin/bash, which is the default for root.
+		unshare --mount -- sh -c 'mount --bind /etc/pam.d/login /etc/pam.d/su && exec -- su -c "exec nsenter --mount --target=1 -- setsid bash -l"' <>/dev/ttyS0 >&0 2>&0
+		echo $? >/dev/ttyS1
+		openrc-shutdown --poweroff
+		sleep infinity
+		EOT
+
+	install -Dm755 /dev/stdin "${arg_mountpoint}/etc/init.d/osi-shell" <<-'EOT'
+		#!/usr/bin/openrc-run
+
+		description="osi-shell service"
+		supervisor=supervise-daemon
+		command=/etc/osi-shell
+		pidfile="/run/${RC_SVCNAME}.pid"
+
+		depend() {
+			 after network-online
+		}
+		EOT
+	arch-chroot -- "$arg_mountpoint" rc-update add osi-shell default
+}