/lib/bilibop/drivemap.sh is in bilibop-common 0.4.20.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# vim: set et sw=4 sts=4 ts=4 fdm=marker fcl=all:
# The _drivemap_* functions need some more common functions:
. /lib/bilibop/common.sh
get_udev_root
### DRIVEMAP FUNCTIONS ###
# _drivemap_initial_indent() ================================================{{{
# What we want is: initialize the indentation values to show the disk map as
# a tree. We use the length of the $udev_root string to align indentations on
# the path separator (/). We will have to consider two types of indentation:
# the absolute one is N times the indent unit, N being the indentation level;
# the relative one is the addition of an indent unit to the previous
# indentation string, without knowledge of its level. Here we want the absolute
# form. The relative indentations will be set using local variables (local
# indent="${indent}${I}") in some functions. By this way we will go back to
# the previous indentation level after the function (and sub-functions) has
# terminated.
_drivemap_initial_indent() {
${DEBUG} && echo "> _drivemap_initial_indent $@" >&2
I="$(echo ${udev_root} | sed 's;.; ;g')"
indent=""
}
# ===========================================================================}}}
# _drivemap_max_mp_length() ================================================={{{
# What we want is: define the length of the longest mountpoint string to use it
# in a formated output (with a fixed width), but with aligned paths.
_drivemap_max_mp_length() {
${DEBUG} && echo "> _drivemap_max_mp_length $@" >&2
local length=1
for mp in $(grep "^${udev_root}/" /proc/mounts | sed 's,^[^ ]\+ \([^ ]\+\) .*,\1,')
do [ ${#mp} -gt ${length} ] && length=${#mp}
done
echo ${length}
}
# ===========================================================================}}}
# _drivemap_volume_size() ==================================================={{{
# What we want is: output the size of a device given as argument. This size
# will be added to the informations about the device, and must be human
# readable. To avoid some kind of confusion, we use the same units than the
# vendors, i.e powers of 10 instead of powers of 2 (factor 1000 instead of
# factor 1024). This size string is formated to be right-aligned into a six
# columns space, including the size unit. Sizes into /sys/class/block/*/size
# seem to be given in 512 bytes units, even when /sys/block/*/queue/*_size
# give something different. This can be verified with CDROMs, having a sector
# size of 2048 bytes.
_drivemap_volume_size() {
${DEBUG} && echo "> _drivemap_volume_size $@" >&2
local dev="${1}"
local size="$(cat /sys/class/block/${dev##*/}/size)"
if [ $((size*512/1000/1000/1000/1000)) -gt 1 ]
then printf "%6s" "$((size*512/1000/1000/1000/1000))TB"
elif [ $((size*512/1000/1000/1000)) -ge 10 ]
then printf "%6s" "$((size*512/1000/1000/1000))GB"
elif [ $((size*512/1000/1000)) -gt 10 ]
then printf "%6s" "$((size*512/1000/1000))MB"
elif [ $((size*512/1000)) -gt 10 ]
then printf "%6s" "$((size*512/1000))KB"
else printf "%6s" "$((size*512))B"
fi
}
# ===========================================================================}}}
# _drivemap_mount_point() ==================================================={{{
# What we want is: output the mountpoint of a device given as argument. If the
# argument is a regular file, we assume the corresponding block device is a
# loopback device.
_drivemap_mount_point() {
${DEBUG} && echo "> _drivemap_mount_point $@" >&2
local dev mnt opt
[ -f "${1}" ] &&
for dev in /sys/block/loop?*/loop/backing_file
do
if [ "${1}" = "$(cat ${dev})" ]
then
dev="${dev%/loop/backing_file}"
dev="${udev_root}/${dev##*/}"
eval set -- ${dev}
break
fi
done
grep '^/' /proc/mounts |
while read dev mnt opt
do
[ "$(readlink -f ${dev})" = "$(readlink -f ${1})" ] &&
echo "${mnt}" &&
return 0
done
grep '^/' /proc/swaps |
while read dev opt
do
[ "$(readlink -f ${dev})" = "$(readlink -f ${1})" ] &&
echo "<SWAP>" &&
return 0
done
}
# ===========================================================================}}}
# _drivemap_whole_disk_id() ================================================={{{
# What we want is: output a string identifying the disk given as argument as
# surely as possible for a common user. If possible, this string should begin
# by the bus type, that says where the disk is connected to the computer, and
# include the vendor|manufacturer|product|model name.
_drivemap_whole_disk_id() {
${DEBUG} && echo "> _drivemap_whole_disk_id $@" >&2
local DRIVE_ID devlink bus
# Some device id are not very comprehensive for the standard user. Try to
# use the most explicit if possible...
for bus in usb ieee1394 memstick scsi
do
for devlink in ${DEVLINKS}
do
case "${devlink}" in
/dev/disk/by-id/${bus}-*)
DRIVE_ID="${devlink#/dev/disk/by-id/}"
break 2
;;
esac
done
done
# ...or fallback to the first one, except if it is the obscur wwn-0x*:
# what to do with an hexadecimal number?
[ -z "${DRIVE_ID}" ] &&
for devlink in ${DEVLINKS}
do
case "${devlink}" in
/dev/disk/by-id/wwn-*)
break
;;
/dev/disk/by-id/*)
DRIVE_ID="${devlink#/dev/disk/by-id/}"
break
;;
esac
done
# If not sufficient, try something else
[ -z "${DRIVE_ID}" ] &&
DRIVE_ID="${ID_SERIAL}"
echo "${DRIVE_ID}"
}
# ===========================================================================}}}
# _drivemap_whole_disk_fs() ================================================={{{
_drivemap_whole_disk_fs() {
${DEBUG} && echo "> _drivemap_whole_disk_fs $@" >&2
local DRIVE_SIZE DRIVE_INFO
if [ "${ID_CDROM}" = "1" ]
then
if [ "${_info_}" = "true" ]
then DRIVE_SIZE="$(_drivemap_volume_size ${1})"
DRIVE_INFO="${ID_FS_TYPE:+${ID_FS_TYPE} | }${DRIVE_SIZE}"
else DRIVE_INFO=
fi
_drivemap_print_line "${I}${ID_FS_LABEL:-${1}}" "${DRIVE_INFO:+[ ${DRIVE_INFO} ]}" fill
else
if [ "${_info_}" = "true" ]
then DRIVE_SIZE="$(_drivemap_volume_size ${1})"
DRIVE_INFO="${ID_FS_TYPE:+${ID_FS_TYPE} | }${DRIVE_SIZE}"
else DRIVE_INFO=
fi
_drivemap_print_line "${1}" "${DRIVE_INFO:+[ ${DRIVE_INFO} ]}" fill
fi
}
# ===========================================================================}}}
# _drivemap_whole_disk() ===================================================={{{
# What we want is: generate the elements of a line about the whole disk given
# as argument
_drivemap_whole_disk() {
${DEBUG} && echo "> _drivemap_whole_disk $@" >&2
local DRIVE_ID DRIVE_SIZE DRIVE_INFO
if [ "${_info_}" = "true" ]
then
eval $(query_udev_envvar "${1}")
DRIVE_ID="$(_drivemap_whole_disk_id ${1})"
DRIVE_SIZE="$(_drivemap_volume_size ${1})"
# No sense to attribute a size to an optical drive. Only the
# inserted medium, if it exists, can have a size.
[ "${ID_CDROM}" = "1" ] && DRIVE_SIZE=" --"
# Catenate id and size and with a separator between them.
DRIVE_INFO="${DRIVE_ID:+${DRIVE_ID} | }${DRIVE_SIZE}"
fi
# Print the result, but never fill the line with dots:
_drivemap_print_line "${1}" "${DRIVE_INFO:+[ ${DRIVE_INFO} ]}" #fill
}
# ===========================================================================}}}
# _drivemap_dotline() ======================================================={{{
# What we want is: output a line of dots with a length depending of two numbers
# given as arguments.
_drivemap_dotline() {
${DEBUG} && echo "> _drivemap_dotline $@" >&2
[ $((${_width_}-2-${1}-${2})) -gt 0 ] &&
echo "........................................................................................................................................................................................................" |
sed "s;^\(\.\{$((${_width_}-2-${1}-${2}))\}\).*;\1;"
}
# ===========================================================================}}}
# _drivemap_print_line() ===================================================={{{
# What we want is: output a device name and optionally information about
# it. The line can be indented, formated for 70 columns, and filled with
# dots to make it more readable. The first argument is the indentation
# string and the device name. It is mandatory. The second argument consists
# in informations about the device (device id and size, or fstype and size)
# between square brackets. It can be empty. If not, this information will
# be right-aligned. The last argument, optional, is a flag to say: fill
# the line between the device name and the informations with dots. Of
# course, this flag is ignored if the information block is not provided.
_drivemap_print_line() {
${DEBUG} && echo "> _drivemap_print_line $@" >&2
[ "${_mountpoint_}" = "true" ] &&
local mntpnt="$(_drivemap_mount_point ${1%(\*)})"
if [ -n "${2}" -a "${3}" = "fill" ]
then
local dotline="$(_drivemap_dotline ${#1} ${#2})"
printf "${1} ${dotline} ${2}${mntpnt:+ ${mntpnt}}\n"
elif [ -n "${mntpnt}" -a "${3}" = "fill" ]
then
local dotline="$(_drivemap_dotline ${#1} ${length})"
printf "${1} ${dotline} ${mntpnt}\n"
elif [ -n "${2}" ]
then
printf "%s%*s\n" "${1}" $((${_width_}-${#1})) "${2}"
else printf "${1}\n"
fi
}
# ===========================================================================}}}
# _drivemap_loopback_device() ==============================================={{{
# What we want is: print a line about a loop device associated to a file hosted
# on the device given as argument. After what we can check if there is some
# dm device or another loop device hosted on the loop device.
_drivemap_loopback_device() {
${DEBUG} && echo "> _drivemap_loopback_device $@" >&2
local dev loop lofile LOOP_SIZE LOOP_INFO
# Set the indentation string relatively to the previous one, as this:
# local indent="${indent}${I}"
# ^^^^ ^^^^
# local global or at least inherited from the calling function.
# The new (local) indent variable will be inherited by any function called
# by this one.
local indent="${indent}${I}"
# Check only associated loop devices (listed in /proc/partitions)
for loop in $(grep '\sloop[0-9]\+$' /proc/partitions | sed 's,.*\s\([^ ]\+\)$,\1,')
do
# Reset dev - this is mandatory:
dev=
lofile=
# Avoid infinite loops between loopback and dm devices, because each
# of _drivemap_loopback_device and _drivemap_dmdevice_holder calls the
# other:
echo "${ALREADY_DONE}" | grep -qw "${loop}" && continue
if [ "$(underlying_device_from_loop ${udev_root}/${loop})" = "${udev_root}/${1}" ]
then
dev="${udev_root}/${loop}"
fi
[ -b "${dev}" ] || continue
ALREADY_DONE="${ALREADY_DONE:+${ALREADY_DONE} }${loop}"
[ "${_backing_file_}" = "true" ] &&
lofile="$(backing_file_from_loop ${dev})"
[ -e "${lofile}" ] ||
lofile="${dev}"
if [ "${_info_}" = "true" ]
then
# ID_FS_* are not local; so reset it here:
ID_FS_TYPE=
eval "$(query_udev_envvar ${dev})"
LOOP_SIZE="$(_drivemap_volume_size ${dev})"
LOOP_INFO="${ID_FS_TYPE:+${ID_FS_TYPE} | }${LOOP_SIZE}"
fi
[ "${DEVICE}" = "${udev_root}/${loop}" ] &&
[ "${_mark_}" = "true" ] &&
device="${lofile}(*)" ||
device="${lofile}"
_drivemap_print_line "${indent}${device}" "${LOOP_INFO:+[ ${LOOP_INFO} ]}" fill
_drivemap_loopback_device "${loop}"
_drivemap_dmdevice_holder "${loop}"
done
}
# ===========================================================================}}}
# _drivemap_dmdevice_holder() ==============================================={{{
# What we want is: find the dm devices hosted by the dm device or the partition
# given as argument, query informations about it (optional), output the result
# and continue by calling this function from inside itself.
_drivemap_dmdevice_holder() {
${DEBUG} && echo "> _drivemap_dmdevice_holder $@" >&2
local device holder mapped DEVICE_SIZE DEVICE_INFO
# Set the indentation string relatively to the previous one:
local indent="${indent}${I}"
[ "$(echo /sys/class/block/${1}/holders/*)" != "/sys/class/block/${1}/holders/*" ] ||
return 1
for holder in /sys/class/block/${1}/holders/*
do
holder="${holder##*/}"
device="${udev_root}/${holder}"
if [ "${_info_}" = "true" ]
then
ID_FS_TYPE=
eval $(query_udev_envvar "${device}")
DEVICE_SIZE="$(_drivemap_volume_size ${device})"
DEVICE_INFO="${ID_FS_TYPE:+${ID_FS_TYPE} | }${DEVICE_SIZE}"
fi
[ "${_dm_name_}" = "true" ] &&
case "${holder}" in
dm-*)
device="${udev_root}/mapper/$(mapper_name_from_dm_node ${holder})"
;;
esac
[ "${DEVICE}" = "${udev_root}/${holder}" ] &&
[ "${_mark_}" = "true" ] &&
device="${device}(*)"
_drivemap_print_line "${indent}${device}" "${DEVICE_INFO:+[ ${DEVICE_INFO} ]}" fill
_drivemap_loopback_device "${holder}"
_drivemap_dmdevice_holder "${holder}"
done
}
# ===========================================================================}}}
# _drivemap_primary_partitions() ============================================{{{
# What we want is: print a line about each primary partition. If there is an
# extended primary partition, we have to deal with an MBR partition scheme;
# partitions from number 5 to N are logical partitions, and included onto the
# extended one. Or, if there is no extended partition but partitions with a
# number greater than 4, we have to deal with a GPT partition table: this
# means all partitions will be on the same level (no more indent in the tree).
_drivemap_primary_partitions() {
${DEBUG} && echo "> _drivemap_primary_partitions $@" >&2
local n PART PART_SIZE PART_INFO
# At first, find if there is an extended partition on the disk, to treat
# logical partitions as subdevices of this extended one in the tree of
# devices instead of sequentially.
local extended="$(extended_partition "${1}" | sed 's,.*\([1-4]\)$,\1,')"
for PART in ${1}?*
do
# Partition number:
n="$(cat /sys/class/block/${PART##*/}/partition)"
# Absolute indentation, first level:
indent="${I}"
ID_FS_TYPE=
ID_PART_ENTRY_TYPE=
[ -n "${extended}" ] &&
case "${n}" in
[1-4]) ;;
*) continue ;;
esac
if [ "${_info_}" = "true" ]
then
eval $(query_udev_envvar "${PART}")
[ "${n}" = "${extended}" ] &&
case "${ID_PART_ENTRY_TYPE}" in
0x5) ID_FS_TYPE="Extended" ;;
0xf) ID_FS_TYPE="Extended W95 (LBA)" ;;
0x85) ID_FS_TYPE="Linux Extended" ;;
esac
PART_SIZE="$(_drivemap_volume_size ${PART})"
PART_INFO="${ID_FS_TYPE:+${ID_FS_TYPE} | }${PART_SIZE}"
fi
[ "${DEVICE}" = "${PART}" ] &&
[ "${_mark_}" = "true" ] &&
device="${PART}(*)" ||
device="${PART}"
_drivemap_print_line "${indent}${device}" "${PART_INFO:+[ ${PART_INFO} ]}" fill
if [ "${n}" = "${extended}" ]
then _drivemap_logical_partitions "${1}"
else _drivemap_loopback_device "${PART##*/}"
_drivemap_dmdevice_holder "${PART##*/}"
fi
done
}
# ===========================================================================}}}
# _drivemap_logical_partitions() ============================================{{{
# What we want is: the same than in the previous function, except that this one
# is called only if it exists an extended partition. In that case, partition
# with a number greater than 4 will be treated as logical partitions, and so
# will be shown as subdevices of the extended partition. If there is no
# extended partition but partition numbers greater than 4, we assume we have
# to deal with a GPT partition table.
_drivemap_logical_partitions() {
${DEBUG} && echo "> _drivemap_logical_partitions $@" >&2
local n PART PART_SIZE PART_INFO
for PART in ${1}?*
do
# Partition number:
n="$(cat /sys/class/block/${PART##*/}/partition)"
# Absolute indentation, second level (we consider a logical partition is
# a subdevice of an extended one).
indent="${I}${I}"
case "${n}" in
[1-4])
continue
;;
esac
if [ "${_info_}" = "true" ]
then
ID_FS_TYPE=
eval $(query_udev_envvar "${PART}")
PART_SIZE="$(_drivemap_volume_size ${PART})"
PART_INFO="${ID_FS_TYPE:+${ID_FS_TYPE} | }${PART_SIZE}"
fi
[ "${DEVICE}" = "${PART}" ] &&
[ "${_mark_}" = "true" ] &&
device="${PART}(*)" ||
device="${PART}"
_drivemap_print_line "${indent}${device}" "${PART_INFO:+[ ${PART_INFO} ]}" fill
_drivemap_loopback_device "${PART##*/}"
_drivemap_dmdevice_holder "${PART##*/}"
done
}
# ===========================================================================}}}
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