#!/bin/bash
#%stage: block
#
#%modules: dm-mod
#
#%udevmodules: virtio_blk
#%udevmodules: virtio_console
#%udevmodules: virtio_net
#%udevmodules: virtio_pci
#%udevmodules: virtio_scsi
#%udevmodules: sg
#%udevmodules: sd_mod
#%udevmodules: sr_mod
#%udevmodules: 
#%udevmodules: loop
#%udevmodules: 
#%udevmodules: 9p
#%udevmodules: btrfs
#%udevmodules: cramfs
#%udevmodules: ext2
#%udevmodules: ext3
#%udevmodules: ext4
#%udevmodules: fat
#%udevmodules: fuse
#%udevmodules: hfs
#%udevmodules: hfsplus
#%udevmodules: jfs
#%udevmodules: minix
#%udevmodules: nfs
#%udevmodules: quota
#%udevmodules: reiserfs
#%udevmodules: squashfs
#%udevmodules: squashfs3
#%udevmodules: udf
#%udevmodules: ufs
#%udevmodules: xfs
#%udevmodules: 
#%udevmodules: nls_ascii
#%udevmodules: nls_cp1250
#%udevmodules: nls_cp1251
#%udevmodules: nls_cp1255
#%udevmodules: nls_cp437
#%udevmodules: nls_cp737
#%udevmodules: nls_cp775
#%udevmodules: nls_cp850
#%udevmodules: nls_cp852
#%udevmodules: nls_cp855
#%udevmodules: nls_cp857
#%udevmodules: nls_cp860
#%udevmodules: nls_cp861
#%udevmodules: nls_cp862
#%udevmodules: nls_cp863
#%udevmodules: nls_cp864
#%udevmodules: nls_cp865
#%udevmodules: nls_cp866
#%udevmodules: nls_cp869
#%udevmodules: nls_cp874
#%udevmodules: nls_cp932
#%udevmodules: nls_cp936
#%udevmodules: nls_cp949
#%udevmodules: nls_cp950
#%udevmodules: nls_euc-jp
#%udevmodules: nls_iso8859-1
#%udevmodules: nls_iso8859-13
#%udevmodules: nls_iso8859-14
#%udevmodules: nls_iso8859-15
#%udevmodules: nls_iso8859-2
#%udevmodules: nls_iso8859-3
#%udevmodules: nls_iso8859-4
#%udevmodules: nls_iso8859-5
#%udevmodules: nls_iso8859-6
#%udevmodules: nls_iso8859-7
#%udevmodules: nls_iso8859-9
#%udevmodules: nls_koi8-r
#%udevmodules: nls_koi8-ru
#%udevmodules: nls_koi8ru
#%udevmodules: nls_utf8
#
#%programs: mdadm
#%programs: modprobe
#%programs: lvm
#%programs: grep
#%programs: ls
#%programs: head
#%programs: cat
#%programs: ip
#%programs: date
#%programs: valgrind
#%programs: guestfsd
#%programs: find
#%programs: xargs
#%programs: setctsid
# mount-rootfs-and-do-chroot.sh
#%programs: mkdir
#%programs: stat
#%programs: mount
#%programs: chroot
#%programs: umount
#
# Generated at build time:
#@GUESTFS_EXT_CMDS@
#
missing_commands="@GUESTFS_MISSING_CMDS@"

# Make the modules available now
# run_all.sh will load them after this script is sourced
load_modules

# from libguestfs-1.19.34/appliance/init:

# Scan for MDs.
mdadm -As --auto=yes --run

# Scan for LVM.
lvm vgscan --ignorelockingfailure
lvm vgchange -ay --ignorelockingfailure

# Improve virtio-blk performance (RHBZ#509383).
for f in /sys/block/vd*/queue/rotational; do if test -f $f ; then echo 1 > $f; fi ; done

# These are useful when debugging.
if grep -sq guestfs_verbose=1 /proc/cmdline; then
    ls -lR /dev
    head -n 1234 \
    	/proc/mounts \
	/proc/modules \
	/proc/cpuinfo \
	/proc/uptime \
	/proc/version \
	/proc/partitions
    lvm pvs
    lvm vgs
    lvm lvs
#   ip a
#   ip r
    date
    echo "These commands might be called by guestfsd, but they were not available at buildtime:"
    echo "missing commands: $missing_commands"
    echo
fi

if ! grep -sq guestfs_rescue=1 /proc/cmdline; then
  # Run the daemon under valgrind if ./configure --enable-valgrind-daemon
  vg_channel=/dev/virtio-ports/org.libguestfs.valgrind
  if [ -w $vg_channel ]; then
    if [ -r /etc/guestfsd.suppressions ]; then
      suppressions="--suppressions=/etc/guestfsd.suppressions"
    fi
    exec 3>$vg_channel
    vg="valgrind --leak-check=full --log-fd=3 --error-exitcode=119 --max-stackframe=8388608 --child-silent-after-fork=yes $suppressions"
    echo "enabling valgrind: $vg"
  fi

  # The host will kill qemu abruptly if guestfsd shuts down normally
  $vg guestfsd

  # Otherwise we try to clean up gracefully. For example, this ensures that a
  # core dump generated by the guest daemon will be written to disk.
else
  # Use appliance in rescue mode, also used by the virt-rescue command.
  eval $(grep -Eo 'TERM=[^[:space:]]+' /proc/cmdline)
  PS1='><rescue> '
  console_kname=ttyS0
  if test -f /proc/consoles
  then
    console_major_minor="`sed 's@^.* @@;p;Q' < /proc/consoles `"
    console_dev="`find /sys/ -name dev -type f -print0 | xargs -0 --no-run-if-empty grep -m 1 -l ${console_major_minor}`"
    console_kname=${console_dev%/dev}
    console_kname=${console_kname##*/}
  fi
  export TERM PS1
  echo
  echo "------------------------------------------------------------"
  echo
  echo "Welcome to virt-rescue, the libguestfs rescue shell."
  echo
  echo "Note: The contents of / are the rescue appliance."
  echo "You have to mount the guest's partitions under /sysroot"
  echo "before you can examine them. A helper script for that exists:"
  echo "mount-rootfs-and-do-chroot.sh /dev/sda2"
  echo
  setctsid "/dev/${console_kname}" bash -i
  echo
  echo "virt-rescue: Syncing the disk now before exiting ..."
  echo
fi

echo "Leaving."
echo s > /proc/sysrq-trigger
echo b > /proc/sysrq-trigger
exit 0