/usr/share/live/build/functions/losetup.sh is in live-build 3.0~a24-1ubuntu32.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 | #!/bin/sh
## live-build(7) - System Build Scripts
## Copyright (C) 2006-2011 Daniel Baumann <daniel@debian.org>
##
## live-build comes with ABSOLUTELY NO WARRANTY; for details see COPYING.
## This is free software, and you are welcome to redistribute it
## under certain conditions; see COPYING for details.
Losetup ()
{
DEVICE="${1}"
FILE="${2}"
PARTITION="${3:-1}"
${LB_ROOT_COMMAND} ${LB_LOSETUP} "${DEVICE}" "${FILE}"
FDISK_OUT="$(${LB_FDISK} -l -u ${DEVICE} 2>&1)"
${LB_ROOT_COMMAND} ${LB_LOSETUP} -d "${DEVICE}"
LOOPDEVICE="$(echo ${DEVICE}p${PARTITION})"
if [ "${PARTITION}" = "0" ]
then
Echo_message "Mounting %s with offset 0" "${DEVICE}"
${LB_ROOT_COMMAND} ${LB_LOSETUP} "${DEVICE}" "${FILE}"
else
SECTORS="$(echo "$FDISK_OUT" | sed -ne "s|^$LOOPDEVICE[ *]*\([0-9]*\).*|\1|p")"
OFFSET="$(expr ${SECTORS} '*' 512)"
Echo_message "Mounting %s with offset %s" "${DEVICE}" "${OFFSET}"
${LB_ROOT_COMMAND} ${LB_LOSETUP} -o "${OFFSET}" "${DEVICE}" "${FILE}"
fi
}
Calculate_partition_size ()
{
ORIGINAL_SIZE="${1}"
FILESYSTEM="${2}"
case "${FILESYSTEM}" in
ext2|ext3)
PERCENT="5"
;;
*)
PERCENT="3"
;;
esac
echo $(expr ${ORIGINAL_SIZE} + ${ORIGINAL_SIZE} \* ${PERCENT} / 100 + 1)
}
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