webgui/etc/rc.d/rc.S

#!/bin/bash
#
# /etc/rc.d/rc.S:  System initialization script.
#
# Mostly written by:  Patrick J. Volkerding, <volkerdi@slackware.com>
# LimeTech - Modified for Unraid OS
#

PATH=/usr/local/sbin:/usr/sbin:/sbin:/usr/local/bin:/usr/bin:/bin

# Mount /proc if it is not already mounted:
if [ ! -d /proc/sys ]; then
  /sbin/mount -v proc /proc -n -t proc 2> /dev/null
fi

# Mount /sys if it is not already mounted:
if [ ! -d /sys/kernel ]; then
  /sbin/mount -v sysfs /sys -n -t sysfs 2> /dev/null
fi

# The efivarfs filesystem is used for reading and writing EFI variables, such
# as the boot menu entries. By default efivarfs will be mounted read-write on
# the /sys/firmware/efi/efivars directory. To modify this behavior, edit the
# file: /etc/default/efivarfs
# Only try to mount if this directory exists (so the kernel supports efivarfs):
if [ -d /sys/firmware/efi/efivars ]; then
  # Only try to mount if efivarfs is not already mounted:
  if ! /sbin/mount | /bin/grep -wq efivarfs ; then
    # Mount according to /etc/default/efivarfs:
    if [ -r /etc/default/efivarfs ]; then
      . /etc/default/efivarfs
    else # default
      EFIVARFS=rw
    fi
    case "$EFIVARFS" in
      'rw')
      /sbin/mount -o rw -t efivarfs none /sys/firmware/efi/efivars
      ;;
      'ro')
      /sbin/mount -o ro -t efivarfs none /sys/firmware/efi/efivars
      ;;
    esac
  fi
fi

# If /run exists, mount a tmpfs on it (unless the
# initrd has already done so):
if [ -d /run ]; then
  if ! /bin/grep -wq "tmpfs /run tmpfs" /proc/mounts ; then
    /sbin/mount -v -n -t tmpfs tmpfs /run -o mode=0755,size=32M,nodev,nosuid,noexec
  fi
fi

# limetech - lets mount debugfs
/sbin/mount -v -t debugfs none /sys/kernel/debug

# limetech - determine if the 'unraidlabel' kernel append parameter was
# provided to override which device is mounted for /boot (default: UNRAID)
UNRAIDLABEL="UNRAID"
UNRAIDROOT=
set -- $(cat /proc/cmdline)
for x in "$@"; do
    case "$x" in
        unraidlabel=*)
        UNRAIDLABEL="${x#unraidlabel=}"
        ;;
        root=*)
        UNRAIDROOT="${x#root=}"
        ;;
    esac
done

# limetech - poll for device with $UNRAIDLABEL present, with 30-sec timeout
# this serves to synchronize this script with USB subsystem
abort() {
  read -p "$1 - press ENTER key to reboot ..."
  echo
  /sbin/reboot
}
find_device() {
  # find which USB flash device/partition has the indicated label
  local i
  for i in {1..30} ; do
    DEVICE=$(/sbin/blkid -L $UNRAIDLABEL)
    [[ -z $DEVICE ]] && sleep 1 || return 0
  done
  return 1
}
echo -n "waiting up to 30 sec for device with label $UNRAIDLABEL to come online ... "
find_device && echo "found $DEVICE" || abort "not found"

echo "Checking $DEVICE ..."
/sbin/fsck.fat -a -w $DEVICE 2>/dev/null

/sbin/mount -v -t vfat -o auto,rw,flush,noatime,nodiratime,dmask=77,fmask=177,shortname=mixed $DEVICE /boot || abort "cannot mount $DEVICE"

# check initial files used to boot
bzcheck () {
  local BZFILE=$1
  if [[ -f /boot/config/skipbzcheck ]]; then
    echo "Skipping $BZFILE checksum verification"
    return
  fi
  echo "Verifying $BZFILE checksum ..."
  [[ ! -f "/boot/$BZFILE" ]] && abort "$BZFILE not present"
  local BZFILECHK="$BZFILE.sha256"
  [[ ! -f "/boot/$BZFILECHK" ]] && abort "$BZFILECHK not present"
  local SUM1=$(/bin/sha256sum /boot/$BZFILE)
  local SUM2=$(/bin/cat /boot/$BZFILECHK)
  [[ "${SUM1:0:63}" != "${SUM2:0:63}" ]] && abort "$BZFILE checksum error"
}
bzmount () {
  local BZFILE=$1
  local MNTDIR=$2
  bzcheck $BZFILE
  /bin/mkdir -p /$MNTDIR
  /sbin/mount -v -r -t squashfs /boot/$BZFILE /$MNTDIR || abort "cannot mount $BZFILE"
  # setup an overlayfs
  /bin/mkdir -p /var/local/overlay/$MNTDIR
  /bin/mkdir -p /var/local/overlay-work/$MNTDIR
  /sbin/mount -v -t overlay overlay -o lowerdir=/$MNTDIR,upperdir=/var/local/overlay/$MNTDIR,workdir=/var/local/overlay-work/$MNTDIR /$MNTDIR
}
if [[ $UNRAIDROOT == "" ]]; then
  bzcheck "bzimage"
  bzcheck "bzroot"
  bzcheck "bzroot-gui"

  bzmount "bzmodules" "lib"
  bzmount "bzfirmware" "usr"

  # now that /usr is mounted make /etc/rc.d a symlink
  /bin/rm -r /etc/rc.d
  /bin/ln -s /usr/local/etc/rc.d /etc

  # move /var/log to a tmpfs
  /bin/mv /var/log/* /var/empty
  /sbin/mount -t tmpfs -o size=128m,mode=0755 tmpfs /var/log
  /bin/mv /var/empty/* /var/log
else
  echo "Checking root filesystem"
  /sbin/fsck -C -a $UNRAIDROOT
  RETVAL=$?
  [[ $RETVAL -ge 2 ]] && abort "fsck failed with return value $RETVAL"
  # Remount the root filesystem in read-write mode
  echo "Remounting $UNRAIDROOT with read-write enabled."
  /sbin/mount -w -v -n -o remount /
  RETVAL=$?
  [[ $RETVAL -gt 0 ]] && abort "failed to remount $UNRAIDROOT r/w with return value $RETVAL"
fi

# invoke testing hook
if [[ -f /boot/config/rc.S.extra ]]; then
  source /boot/config/rc.S.extra
fi
# and continue in separate script
source /etc/rc.d/rc.S.cont