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#!/usr/bin/expect -f
# Automated OpenBSD installer via serial console.
# Called by setup.sh — arguments: disk iso ram cpus ssh_port
set timeout 600
log_user 1
set disk [lindex $argv 0]
set iso [lindex $argv 1]
set ram [lindex $argv 2]
set cpus [lindex $argv 3]
set sshport [lindex $argv 4]
spawn qemu-system-x86_64 \
-machine accel=kvm \
-cpu host \
-m $ram \
-smp $cpus \
-drive file=$disk,format=qcow2,if=virtio \
-cdrom $iso \
-boot d \
-netdev user,id=net0,hostfwd=tcp::${sshport}-:22 \
-device virtio-net-pci,netdev=net0 \
-nographic
# Redirect console to serial at boot prompt
expect "boot>"
send "set tty com0\r"
expect "boot>"
send "\r"
# Installer menu
expect "(I)nstall"
send "i\r"
# Terminal type — accept default vt220
expect "Terminal type"
send "\r"
expect "System hostname"
send "buildvm\r"
# Network — accept default vio0
expect "Network interface to configure"
send "\r"
# IPv4 — default is autoconf
expect "IPv4 address"
send "\r"
expect "IPv6 address"
send "none\r"
# Done configuring interfaces
expect "Network interface to configure"
send "done\r"
# DNS domain — installer may skip this prompt entirely.
# Either way, wait for the password prompt.
expect -re "will not echo.*$"
sleep 2
send "build123\r"
expect -re "again.*$"
sleep 2
send "build123\r"
expect "Start sshd"
send "\r"
expect "Do you expect to run the X"
send "no\r"
# Console redirect prompt (because we set tty com0)
expect "Change the default console"
send "yes\r"
# Speed — accept default
expect "Which speed"
send "\r"
# User setup — wait for full prompt to appear before sending
expect -re "etup a user.*\\]"
sleep 1
send "pbuild\r"
expect "Full name"
send "\r"
# User password — same serial console timing as root password
expect -re "will not echo.*$"
sleep 2
send "build123\r"
expect -re "again.*$"
sleep 2
send "build123\r"
expect "Allow root ssh login"
send "no\r"
expect "timezone"
send "UTC\r"
expect "root disk"
send "\r"
# Disk encryption — decline (OpenBSD 7.8+)
expect "Encrypt the root disk"
send "\r"
# Whole disk
expect "Use (W)hole"
send "w\r"
# GPT or auto layout
expect {
"Use (G)PT" { send "\r"; exp_continue }
"(A)uto layout" { send "a\r" }
}
expect "Location of sets"
send "cd0\r"
expect "Pathname to the sets"
send "\r"
expect "Set name"
send -- "-game*\r"
expect "Set name"
send -- "-x*\r"
expect "Set name"
send "\r"
expect "without verification"
send "yes\r"
# After sets install, installer asks if we want more sets — accept "done" default
expect -timeout 600 "Location of sets"
send "\r"
# Wait for finalization
expect -timeout 120 "CONGRATULATIONS"
# Time may or may not appear wrong
expect -re "Time appears wrong|Exit to"
if {[string match "*Time*" $expect_out(0,string)]} {
send "\r"
expect "Exit to"
}
# Drop to installer shell instead of rebooting (CD is still attached,
# reboot would boot the installer again). The installed system is at /mnt.
send "s\r"
expect "#"
# Configure doas and wheel group on the installed system
send "chroot /mnt usermod -G wheel pbuild\r"
expect "#"
send "echo 'permit nopass pbuild' > /mnt/etc/doas.conf\r"
expect "#"
# Shut down cleanly
send "halt -p\r"
expect -timeout 60 eof
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