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#!/bin/sh
REQUIRED_MB=250 # minimum megabytes available to offer install
MENUFIFO=/menu.fifo
DEBUG=y
LOGBASE=/var/log

debug_log()
{
  if [ -n "$DEBUG" ]; then
    if [ -n "$1" ]; then
      DEBUG_LOG=$LOGBASE/"$1".$$.log
    else
      DEBUG_LOG=$LOGBASE/$(basename $0).$$.log
    fi
    mkdir -p $LOGBASE
    exec >>$DEBUG_LOG 2>&1
    set -x
  fi
}
addmenu()
{
  cat <<END >>$MENUFIFO # mind the tabs
setItem "$1" "dummy" "$2" "$3"
END
}
menutitle()
{
  printf 'setTitle "%s"\n' "$1" >>$MENUFIFO
  printf 'setWelcomeText "%s"\n' "$2" >>$MENUFIFO
}
bootmenu()
{
  local do_trigger="$1" no_panic="$2"
  /bin/openvt -f -c 7 -- dynmenu "$MENUFIFO" &&
  chvt 7 &&
  menutitle 'Samizdat\n\nAs the Internet develops there are\ntransitions in the management arrangements.\nThe time has come to take\na small step in one of those transitions.' 'Choose an installation target.'
# menutitle 'Samizdat\nfreedom from surveillance\nno trusted authorities' 'Choose an installation target.'
  addmenu "ramdisk" "[ Boot to RAM without installing anything ]" "menu-select boot-ram"
  if [ $? != 0 -a ! "$no_panic" ]; then
    panic "error loading boot menu!  the system won't be usable :("
  fi
  if [ "$do_trigger" ]; then
    udevadm trigger --subsystem-match=block --action=add
  fi
}
find_squashfs_root()
{
  # TODO: "make" puts the correct location in $iso_squashfs_dir.  Get
  # information into this function!

  bootwait samizdat-cdrom
  for dir in /cdrom/live /cdrom/liveos /cdrom/aptosid /cdrom/*
  do
    [ -d "$dir" ] || continue;
    if [ -f "$dir"/filesystem.module ]; then
      while read fs; do
	[ -f "$dir"/"$fs" ] && echo "$dir" "$fs"
      done < "$dir"/filesystem.module
      return
    fi
  done
  for fs in /cdrom/live/filesystem.squashfs /cdrom/live/grml-small.squashfs /cdrom/liveos/squashfs.img /cdrom/aptosid/aptosid.* /cdrom/*/*.squashfs
  do
    if [ -f "$fs" ]; then
      echo "${fs%/*}" "${fs##*/}"
      break
    fi
  done
}
xtrace()
{
  case "$-" in
  *x*) "$@" ;;
  *) set -x; "$@"; set +x ;;
  esac
}
sleepcmd() {
  local t=$1
  shift
  echo "about to run '$*' (in $t)"
  sleep $t
  "$@"
}
sleep_forever_verbose() {
  sleep 4294967295 &
  local sleep=$!
  warn "sleeping until you kill $sleep..."
  wait $sleep
}
warn() { [ -z "$warnings" ] || echo "$@" >&2; }
panic()
{
  set +x
  exec </dev/tty1 >/dev/tty1 2>&1
  reset
  echo "[p$$] initramfs /init: fatal error: $@"
  echo "[p$$] will now exec emergency shell"
  export PS1="[p$$ \\w]# "
  chvt 1
  exec /bin/sh -i
}
bootwait()
{
  mkdir -p /bootwait
  local i=$#; while [ $i -gt 0 ]; do
    i=$((i-1))
    local f="$1"; shift; set -- "$@" "/bootwait/$f" 
  done
  wait_for_files "$@"
}
bootdone()
{
  mkdir -p /bootwait
  local i=$#; while [ $i -gt 0 ]; do
    i=$((i-1))
    local f="$1"; shift; set -- "$@" "/bootwait/$f" 
  done
  touch "$@"
}
my_openvt()
{
  /bin/openvt -c "$@"
}

# This runs before way before NTP and on a LiveCD we have no
# reason to trust the system clock.
gpg2_nobatch() { GPG_TTY=$(tty) command gpg2 --ignore-time-conflict --ignore-valid-from "$@"; }
gpg2() { gpg2_nobatch --batch "$@"; }

xcp() { if [ -f "$1" -a ! -f "$2" ]; then cp "$1" "$2"; fi; }

mountsquashes()
{
  local name dirname basename
  while read dirname basename && [ -d "$dirname" -a -f "$dirname/$basename" ]; do
    name=${basename%.squashfs}
    mkdir -p "/squashes/$name" || return 1
    xcp "$dirname"/filesystem.module /squashes/filesystem.module || return 1
    mountpoint -q "/squashes/$name" ||
    mount -o ro,loop "$dirname/$basename" "/squashes/$name" || return 1
  done
}