#!/bin/hush

# Announce version
sed -n 's/PRETTY_NAME="\([^"]*\)"/\1/p' /etc/os-release

export HOME=/home
export PATH=/bin:/sbin

# Mount filesystems
mountpoint -q proc || mount -t proc proc proc
mountpoint -q sys || mount -t sysfs sys sys
mountpoint -q dev || mount -t devtmpfs dev dev || mdev -s
mkdir -p dev/pts
mountpoint -q dev/pts || mount -t devpts dev/pts dev/pts
# /tmp inherited from initmpfs

# If nobody said how many CPUS to use in builds, try to figure it out.
if test -z $CPUS
{
  export CPUS=$(echo /sys/devices/system/cpu/cpu[0-9]* | wc -w)
  test $CPUS -lt 1 && setvar CPUS = '1'
}
export PS1="($HOST:$CPUS) \w \$ "

# When running under qemu, do some more setup
if test $$ -eq 1
{

  # Note that 10.0.2.2 forwards to 127.0.0.1 on the host.

  # Setup networking for QEMU (needs /proc)
  ifconfig eth0 10.0.2.15
  route add default gw 10.0.2.2

  # If we have no RTC, try rdate instead:
  test $(date +%s) -lt 1000 && rdate 10.0.2.2 # or time-b.nist.gov

  # mount hda on /usr/overlay, hdb on /home, and hdc on /mnt, if available

  test -b /dev/[hsv]da &&
    mkdir -p /usr/overlay && mount /dev/[hsv]da /usr/overlay
  test -b /dev/[hsv]db && mount -o noatime /dev/[hsv]db /home && cd /home
  test -b /dev/[hsv]dc && mount -o ro /dev/[hsv]dc /mnt

  test -z $CONSOLE &&
    setvar CONSOLE = "$(sed -n 's@.* console=\(/dev/\)*\([^ ]*\).*@\2@p' /proc/cmdline)"

  # Call overlay/init if available
  test -e /usr/overlay/init && source /usr/overlay/init

  test -z $HANDOFF && echo Type exit when done. && setvar HANDOFF = "/bin/hush"
  test -z $CONSOLE && setvar CONSOLE = 'console'
  exec /sbin/oneit -c /dev/"$CONSOLE" $HANDOFF

# If we're not PID 1, it's probably a chroot.
} else {
  test ! -z $(grep "default for QEMU" /etc/resolv.conf) &&
    echo "nameserver 8.8.8.8" > /etc/resolv.conf

  # If we have no RTC, try using ntp to set the clock
  test $(date +%s) -lt 10000000 && ntpd -nq -p north-america.pool.ntp.org

  # Switch to a shell with command history.

  echo Type exit when done.
  /bin/hush
  cd /
  umount ./dev/pts
  umount ./dev
  umount ./sys
  umount ./proc
  sync
}