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#!/hint/bash -euE
# Copyright (C) 2018 Luke Shumaker
# SPDX-License-Identifier: AGPL-3.0-or-later
post_install+=(10:systemd-osi-shell:post_install)
systemd-osi-shell:post_install() {
local arg_mountpoint=$1
cat <<-'EOT' > "${arg_mountpoint}/etc/systemd/system/osi-shell.target"
[Unit]
Description=osi-shell target
Requires=multi-user.target
After=multi-user.target
Conflicts=rescue.target
AllowIsolate=yes
EOT
ln -sfT -- osi-shell.target "${arg_mountpoint}/etc/systemd/system/default.target"
cat <<-'EOT' > "${arg_mountpoint}/etc/systemd/system/osi-shell.service"
[Unit]
Description=osi-shell service
Wants=network-online.target
After=network-online.target
[Service]
KillSignal=SIGHUP
KillMode=process
IgnoreSIGPIPE=no
ExecStart=/bin/login -p -f root
StandardInput=tty
TTYPath=/dev/ttyS0
TTYReset=yes
TTYVHangup=yes
# Write the exit status to ttyS1 and poweroff
# Bash sets exit status to 128+SIGNAL if we get killed by a signal,
# but there's not a good one-liner way to get from signal name to number,
# so just use 128.
ExecStopPost=/bin/sh -c 'if [ "$EXIT_CODE" = exited ]; then echo $EXIT_STATUS; else echo 128; fi > /dev/ttyS1; systemctl poweroff --no-block'
[Install]
WantedBy=osi-shell.target
EOT
systemctl --root="$arg_mountpoint" enable osi-shell.service
}
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