slackware-current/source/installer/sources/initrd/sbin/probe

#!/bin/bash
# This is 'probe', a wrapper for using fdisk to gather drive info for
# the Slackware setup scripts.  I hate to bounce this much garbage through
# a tmpdir, but it looks like large variables can make ash crash...

# Many thanks to Vincent Rivellino for contributing the patches to support
# Mylex and Compaq RAID controllers.

# Regularize output that will be parsed:
unset LANG LC_CTYPE LC_NUMERIC LC_TIME LC_COLLATE LC_MONETARY \
  LC_MESSAGES LC_PAPER LC_NAME LC_ADDRESS LC_TELEPHONE LC_MEASUREMENT \
  LC_IDENTIFICATION LC_ALL
LANG=C
export LANG

TMP=/var/log/setup/tmp

# Use cached results if they exist and /proc/partitions has not changed:
if [ -r $TMP/SeTpartition.md5 -a -r $TMP/SeTfdisk ]; then
  if [ "$(cat $TMP/SeTpartition.md5)" = "$(md5sum /proc/partitions)" ]; then
    cat $TMP/SeTfdisk
    exit 0
  fi
fi

# First run, or /proc/partitions has changed.
# Make a checksum for later comparison:
md5sum /proc/partitions > $TMP/SeTpartition.md5

# Wipe any previously existing results:
rm -f $TMP/SeTfdisk

# listide major minor hd1 hd2 (2 base devs for major)
list_ide() {
  if [ "$2" = "0" ]; then
    fdisk -l /dev/$3 >> $TMP/SeTfdisk
  elif [ "$2" = "64" ]; then
    fdisk -l /dev/$4 >> $TMP/SeTfdisk
  fi
}

list_scsi() {
  # find drive # 0 - 15
  DRV=`expr $1 / 16`
  NUM=`expr $1 % 16`
  if [ ! "$NUM" = "0" ]; then
    return
  fi
  if [ "$DRV" = "0" ]; then
    fdisk -l /dev/sda >> $TMP/SeTfdisk
  elif [ "$DRV" = "1" ]; then
    fdisk -l /dev/sdb >> $TMP/SeTfdisk
  elif [ "$DRV" = "2" ]; then
    fdisk -l /dev/sdc >> $TMP/SeTfdisk
  elif [ "$DRV" = "3" ]; then
    fdisk -l /dev/sdd >> $TMP/SeTfdisk
  elif [ "$DRV" = "4" ]; then
    fdisk -l /dev/sde >> $TMP/SeTfdisk
  elif [ "$DRV" = "5" ]; then
    fdisk -l /dev/sdf >> $TMP/SeTfdisk
  elif [ "$DRV" = "6" ]; then
    fdisk -l /dev/sdg >> $TMP/SeTfdisk
  elif [ "$DRV" = "7" ]; then
    fdisk -l /dev/sdh >> $TMP/SeTfdisk
  elif [ "$DRV" = "8" ]; then
    fdisk -l /dev/sdi >> $TMP/SeTfdisk
  elif [ "$DRV" = "9" ]; then
    fdisk -l /dev/sdj >> $TMP/SeTfdisk
  elif [ "$DRV" = "10" ]; then
    fdisk -l /dev/sdk >> $TMP/SeTfdisk
  elif [ "$DRV" = "11" ]; then
    fdisk -l /dev/sdl >> $TMP/SeTfdisk
  elif [ "$DRV" = "12" ]; then
    fdisk -l /dev/sdm >> $TMP/SeTfdisk
  elif [ "$DRV" = "13" ]; then
    fdisk -l /dev/sdn >> $TMP/SeTfdisk
  elif [ "$DRV" = "14" ]; then
    fdisk -l /dev/sdo >> $TMP/SeTfdisk
  elif [ "$DRV" = "15" ]; then
    fdisk -l /dev/sdp >> $TMP/SeTfdisk
  fi
}

# List Mylex RAID device
list_rd() {
  # find drive
  DRV=`expr $2 / 8`
  NUM=`expr $2 % 8`
  if [ ! "$NUM" = "0" ]; then
    return
  fi
  fdisk -l /dev/rd/c$1d$DRV >> $TMP/SeTfdisk
  #output_gpt_partitions /dev/rd/c$1d$DRV >> $TMP/SeTfdisk
}

# List Cpq SMART/2 RAID device
list_ida() {
  # find drive
  DRV=`expr $2 / 16`
  NUM=`expr $2 % 16`
  if [ ! "$NUM" = "0" ]; then
    return
  fi
  fdisk -l /dev/ida/c$1d$DRV >> $TMP/SeTfdisk
  #output_gpt_partitions /dev/ida/c$1d$DRV >> $TMP/SeTfdisk
}

list_cciss() {
  # find drive
  DRV=`expr $2 / 16`
  NUM=`expr $2 % 16`
  if [ ! "$NUM" = "0" ]; then
    return
  fi
  fdisk -l /dev/cciss/c$1d$DRV >> $TMP/SeTfdisk
  #output_gpt_partitions /dev/cciss/c$1d$DRV >> $TMP/SeTfdisk
}

list_ataraid() {
  # find drive
  DRV=`expr $2 / 16`
  NUM=`expr $2 % 16`
  if [ "$NUM" = "0" ]; then
     fdisk -l /dev/ataraid/d$DRV >> $TMP/SeTfdisk
     #output_gpt_partitions /dev/ataraid/d$DRV >> $TMP/SeTfdisk
  else
     return
  fi
}

list_amiraid() {
  # find drive
  DRV=`expr $2 / 16`
  NUM=`expr $2 % 16`
  if [ "$NUM" = "0" ]; then
     fdisk -l /dev/amiraid/ar$DRV >> $TMP/SeTfdisk
     #output_gpt_partitions /dev/amiraid/ar$DRV >> $TMP/SeTfdisk
  else
     return
  fi
}

list_mmc() {
  local device
  # Filter out any partitions on the block device, as we'll use
  # fdisk to capture those:
  grep -qE 'mmcblk[0-9]' /proc/partitions && {
    lsblk -o name,type -Mripnd /dev/mmcblk* | grep -E 'disk$' | awk '{print $1}' | while read device ; do
      fdisk -l $device >> $TMP/SeTfdisk
    done ;}
}

list_nvme() {
  fdisk -l | grep $1 >> $TMP/SeTfdisk 2> /dev/null
}

is_swap() {
  HEADER=$(dd if="$1" bs=1 skip=4086 count=10 2>/dev/null | strings)
  if [ "$HEADER" = "SWAPSPACE2" -o "$HEADER" = "SWAP_SPACE" ]; then
    return 0
  else
    return 1
  fi
}

list_md() {
  if ( is_swap "/dev/$2" ); then TYPE="Linux swap"; else TYPE="Linux"; fi
  echo "/dev/$2  1 2 $1 kk $TYPE" >> $TMP/SeTfdisk
}

list_lvm() {
  lvscan 2>/dev/null | grep "ACTIVE" | while read line ; do
    SMASHED_LINE=$line
    if [ "$SMASHED_LINE" = "" ]; then
      break;
    fi
    DEV=`echo $SMASHED_LINE | cut -f2 -d"'"`
    SIZE=`lvdisplay $DEV -C --units k --noheadings --separator : | cut -f4 -d':'  | sed -e 's/^\([0-9]*\)[^0-9].*/\1/'`
    TYPE="Linux"
    if ( is_swap "$DEV" ); then TYPE="Linux swap"; fi
    echo "$DEV  0  0  $SIZE  lv  $TYPE" >> $TMP/SeTfdisk
  done
}

# List any volumes created by cryptsetup
list_crypt() {
  for i in $(/bin/ls /dev/mapper/); do
    if cryptsetup status $i 2>/dev/null | grep -wq "cipher:" ; then
      DEV=$(cryptsetup status $i | head -n 1 | cut -f 1 -d ' ')
      SIZE=$(fdisk -s $(cryptsetup status $i | grep "device:" | cut -f 2 -d : | tr -d ' '))
      echo "$DEV  0  0  $SIZE  lc  Linux" >> $TMP/SeTfdisk
    fi
  done
}

# List virtual partitions
list_virt() {
  fdisk -l /dev/$1 >> $TMP/SeTfdisk
  #output_gpt_partitions /dev/$1 >> $TMP/SeTfdisk
}

output_gpt_partitions() {
# First, make sure the device is GPT:
if fdisk -l $1 2> /dev/null | grep -wq -e "GPT" -e "Disklabel type: gpt" ; then 
  unset output
  # In the case of some RAID device like Mylex we will need to delimit the
  # partition number.  We will set a partition delimiter variable P set
  # either to an empty string (default) or the needed delimiter.
  TESTRAID="$(echo $1 | cut -f 2 -d /)"
  case "$TESTRAID" in
  'amiraid' )
    P="p"
    ;;
  'ataraid' )
    P="p"
    ;;
  'cciss' )
    P="p"
    ;;
  'ida' )
    P="p"
    ;;
  'rd' )
    P="p"
    ;;
  *)
    P=""
    ;;
  esac
  gdisk -l $1 | tr -d '*' | while read parse ; do
    if [ ! -z $output ]; then
      line=$parse
      if [ ! "$(echo $line | cut -b1)" = "" ]; then
        gptpartition=${1}${P}$(echo $line | cut -f 1 -d ' ')
        gpttype="$(echo $line | cut -f 6 -d ' ')"
        if [ "$gpttype" = "8200" ]; then
          fdisktype="Linux swap"
        elif [ "$gpttype" = "0700" ]; then
          if dd if=$gptpartition bs=1K count=1 2> /dev/null | grep -wq NTFS ; then
            fdisktype="HPFS/NTFS"
          elif dd if=$gptpartition bs=1K count=1 2> /dev/null | grep -wq EXFAT ; then
            fdisktype="exFAT"
          else
            fdisktype="W95 FAT32"
          fi
        elif [ "$gpttype" = "AF00" ]; then
          fdisktype="HFS+"
        elif [ "$gpttype" = "EF00" ]; then
          fdisktype="EFI System Partition"
        elif [ "$gpttype" = "8300" ]; then
          fdisktype=Linux
        else
          fdisktype="Unknown hex code $gpttype"
        fi
        sectorsize="$(gdisk -l $1 | tr -d '*' | grep "Logical sector size" | cut -f 2 -d : | cut -f 2 -d ' ')"
        gptstart="$(expr $(echo $line | cut -f 2 -d ' ') \* $sectorsize / 1024)"
        gptend="$(expr $(echo $line | cut -f 3 -d ' ') \* $sectorsize / 1024)"
        gptsize="$(expr $gptend - $gptstart)"
        echo $gptpartition $gptstart $gptend $gptsize $gpttype $fdisktype
      fi
    fi
    if echo $parse | grep -q "^Number" ; then
      output=true
    fi
  done
fi
}

list_scsi_gpt() {
  # find drive # 0 - 15
  DRV=`expr $1 / 16`
  NUM=`expr $1 % 16`
  if [ ! "$NUM" = "0" ]; then
    return
  fi
  if [ "$DRV" = "0" ]; then
    output_gpt_partitions /dev/sda
  elif [ "$DRV" = "1" ]; then
    output_gpt_partitions /dev/sdb
  elif [ "$DRV" = "2" ]; then
    output_gpt_partitions /dev/sdc
  elif [ "$DRV" = "3" ]; then
    output_gpt_partitions /dev/sdd
  elif [ "$DRV" = "4" ]; then
    output_gpt_partitions /dev/sde
  elif [ "$DRV" = "5" ]; then
    output_gpt_partitions /dev/sdf
  elif [ "$DRV" = "6" ]; then
    output_gpt_partitions /dev/sdg
  elif [ "$DRV" = "7" ]; then
    output_gpt_partitions /dev/sdh
  elif [ "$DRV" = "8" ]; then
    output_gpt_partitions /dev/sdi
  elif [ "$DRV" = "9" ]; then
    output_gpt_partitions /dev/sdj
  elif [ "$DRV" = "10" ]; then
    output_gpt_partitions /dev/sdk
  elif [ "$DRV" = "11" ]; then
    output_gpt_partitions /dev/sdl
  elif [ "$DRV" = "12" ]; then
    output_gpt_partitions /dev/sdm
  elif [ "$DRV" = "13" ]; then
    output_gpt_partitions /dev/sdn
  elif [ "$DRV" = "14" ]; then
    output_gpt_partitions /dev/sdo
  elif [ "$DRV" = "15" ]; then
    output_gpt_partitions /dev/sdp
  fi
}

# List the LVM volumes:
list_lvm

# List CRYPT volumes:
list_crypt

# List MMC (e.g. SD cards) partitions:
list_mmc

## This is obsolete, since fdisk handles GPT now.
## List GPT partitions:
#cat /proc/partitions | while read line ; do
#  SMASHED_LINE=$line
#  MAJOR=`echo $SMASHED_LINE | cut -f 1 -d ' '`
#  MINOR=`echo $SMASHED_LINE | cut -f 2 -d ' '`
#  if [ "$MAJOR" = "8" ]; then
#    list_scsi_gpt $MINOR
#  fi
#done

# Other partitions:
if cat /proc/partitions | grep -E '/|[0-9]' 1>/dev/null 2>/dev/null ; then # new
  cat /proc/partitions | grep -E '/|[0-9]' | while read line ; do
    SMASHED_LINE=$line
    MAJOR=`echo $SMASHED_LINE | cut -f 1 -d ' '`
    MINOR=`echo $SMASHED_LINE | cut -f 2 -d ' '`
    DEVNAME=`echo $SMASHED_LINE | cut -f 4 -d ' '`
    if [ "$MAJOR" = "3" ]; then
      list_ide $MAJOR $MINOR hda hdb
    elif [ "$MAJOR" = "8" ]; then
      list_scsi $MINOR
    elif [ "$MAJOR" = "9" ]; then
      list_md `echo $SMASHED_LINE | cut -f 3 -d ' ' | tr -d '/'` \
              `echo $SMASHED_LINE | cut -f 4 -d ' '`
    elif [ "$MAJOR" = "22" ]; then
      list_ide $MAJOR $MINOR hdc hdd
    elif [ "$MAJOR" = "33" ]; then
      list_ide $MAJOR $MINOR hde hdf
    elif [ "$MAJOR" = "34" ]; then
      list_ide $MAJOR $MINOR hdg hdh
    elif [ "$MAJOR" = "48" ]; then
      list_rd 0 $MINOR
    elif [ "$MAJOR" = "49" ]; then
      list_rd 1 $MINOR
    elif [ "$MAJOR" = "50" ]; then
      list_rd 2 $MINOR
    elif [ "$MAJOR" = "51" ]; then
      list_rd 3 $MINOR
    elif [ "$MAJOR" = "52" ]; then
      list_rd 4 $MINOR
    elif [ "$MAJOR" = "53" ]; then
      list_rd 5 $MINOR
    elif [ "$MAJOR" = "54" ]; then
      list_rd 6 $MINOR
    elif [ "$MAJOR" = "55" ]; then
      list_rd 7 $MINOR
    elif [ "$MAJOR" = "56" ]; then
      list_ide $MAJOR $MINOR hdi hdj
    elif [ "$MAJOR" = "57" ]; then
      list_ide $MAJOR $MINOR hdk hdl
    elif [ "$MAJOR" = "72" ]; then
      list_ida 0 $MINOR
    elif [ "$MAJOR" = "73" ]; then
      list_ida 1 $MINOR
    elif [ "$MAJOR" = "74" ]; then
      list_ida 2 $MINOR
    elif [ "$MAJOR" = "75" ]; then
      list_ida 3 $MINOR
    elif [ "$MAJOR" = "76" ]; then
      list_ida 4 $MINOR
    elif [ "$MAJOR" = "77" ]; then
      list_ida 5 $MINOR
    elif [ "$MAJOR" = "78" ]; then
      list_ida 6 $MINOR
    elif [ "$MAJOR" = "79" ]; then
      list_ida 7 $MINOR
    elif [ "$MAJOR" = "80" ]; then
      list_ide $MAJOR $MINOR hdm hdn
    elif [ "$MAJOR" = "89" ]; then
      list_ide $MAJOR $MINOR hdo hdp
    elif [ "$MAJOR" = "90" ]; then
      list_ide $MAJOR $MINOR hdq hdr
    elif [ "$MAJOR" = "91" ]; then
      list_ide $MAJOR $MINOR hds hdt
    elif [ "$MAJOR" = "101" ]; then
      list_amiraid $MAJOR $MINOR
    elif [ "$MAJOR" = "104" \
      -o "$MAJOR" = "105" \
      -o "$MAJOR" = "106" \
      -o "$MAJOR" = "107" \
      -o "$MAJOR" = "108" \
      -o "$MAJOR" = "109" \
      -o "$MAJOR" = "110" \
      -o "$MAJOR" = "111" ]; then
      list_cciss $(( $MAJOR - 104 )) $MINOR
    elif [ "$MAJOR" = "114" ]; then
      list_ataraid $MAJOR $MINOR
    elif [ "$MAJOR" = "259" ]; then
      if echo $line | grep -q p; then
        list_nvme $DEVNAME
      fi
    elif [ $(expr $DEVNAME : 'x\?vd[^0-9]*$') -ne 0 ]; then
      # The virtio devices have no set major dev number, so we have to search
      # by name.  Matches full drive names for KVM/lguest (vda) and Xen (xvda).
      list_virt $DEVNAME
    fi
  done
else # old format and no RAID:
  if cat /proc/partitions | grep md 1> /dev/null 2> /dev/null ; then
    cat /proc/partitions | grep md | while read line ; do
      SMASHED_LINE=$line
      MAJOR=`echo $SMASHED_LINE | cut -f 1 -d ' '`
      if [ "$MAJOR" = "9" ]; then
        list_md `echo $SMASHED_LINE | cut -f 3 -d ' ' | tr -d '/'` \
                `echo $SMASHED_LINE | cut -f 4 -d ' '`
      fi
    done
  fi
  fdisk -l 2> /dev/null >> $TMP/SeTfdisk
fi

# Change the names to be the same as what the old fdisk used:
sed -i -e "s/Linux filesystem/Linux/g" $TMP/SeTfdisk
sed -i -e "s/EFI System/EFI System Partition/g" $TMP/SeTfdisk
sed -i -e "s,EFI (FAT-12/16/32),EFI System Partition,g" $TMP/SeTfdisk

# Filter out reserved file system labels for Slackware ARM/AArch64 and the
# Slackware A-i-O (All in One Offline) Installer file systems.
# This prevents them from being offered as candidates for formatting/mounting
# during the installation.
#
# Labels:
#
# Used within the OS:
# -------------------
# SLKhwm_bw = Hardware Model Bootware - native Bootware for the RPi
# SLKefi = FAT32 file system, /boot/efi mountpoint within the OS for Hardware Models
#          that use UEFI firmware.
#
# SLKins = Media (usually a USB stick) containing the Slackware install media
#          This FS label isn't required to locate the media, but it's helpful
#          as a way to exclude the media from the list of candidates.
#          This label is included within the Installation Guide for the USB
#          media installation option.
#
# Used only within the Slackware Installer environment
# ----------------------------------------------------
# SLKins_aio-pkgs =
#          The label of the partition on the All-In-One Installer that contains the
#          Slackware packages.
# SLKins_efi = FAT32 file system for the Installer EFI partition, for Hardware Models
#          that use UEFI firmware.
#          The contents of this are deployed by 'grub-install', which is called from
#          the Hardware Model's 'sdcards.build' plugin.
#          This is not used within the installed OS.
# SLKins_boot = ext4 file system containing the GRUB configuration to boot the
#          Slackware Installer, for Hardware Models using UEFI firmware.
#
# 'SLKroot' is used to identify the OS root file system on ARM, but we don't
# filter it out because it's *supposed* to appear as a candidate within the
# menu.  Whilst we don't ship any images that contain a file system with this label,
# the user might be reinstalling, thus would never be presented with the partition.
#
# SLKboot = Slackware OS /boot partition, but is only reserved only on ARM/AArch64:
[[ "$( uname -m )" =~ a(rm*|arch64) ]] && aexc="boot|"

awk '/^\/dev\// {print $1}' /var/log/setup/tmp/SeTfdisk | while read device; do
    # The wrapping of e2label is because whilst it handles other file system types,
    # it includes verbosity about the filesystem type; where as for ext filesystems
    # it outputs only the label.
    { ( e2label ${device} 2>/dev/null | tail -n1 | rev \
       | awk '{print $1}' | rev | tr -d "'" | \
       grep -Eq "^SLK(${aexc}ins|ins_aio-pkgs|ins_efi|ins_boot|efi|hwm_bw)$" ) && sed -i '\|^'"${device}\s"'|d' $TMP/SeTfdisk ;}
done

# Dump the discovered storage:
cat $TMP/SeTfdisk