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modfs
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modfs
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#! /bin/sh
# vim: set tabstop=4 shiftwidth=4 syntax=sh highlight=on
# SPDX-License-Identifier: GPL-2.0-or-later
################################################################################
# #
# an alternative approach to modify firmware images for AVM FRITZ!Box routers #
# #
# Copyright (C) 2014-2020 P.Hämmerlein (http://www.yourfritz.de) #
# #
# This program is free software; you can redistribute it and/or #
# modify it under the terms of the GNU General Public License #
# as published by the Free Software Foundation; either version 2 #
# of the License, or (at your option) any later version. #
# #
# This program is distributed in the hope that it will be useful, #
# but WITHOUT ANY WARRANTY; without even the implied warranty of #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
# GNU General Public License under #
# http://www.gnu.org/licenses/gpl-2.0.html #
# for more details. #
# #
# "FRITZ!Box" and "FRITZ!" are registered word marks and "AVM" is a registered #
# word and figurative mark of: #
# AVM Computersysteme Vertriebs GmbH, 10559, Berlin, DE. #
# #
################################################################################
#
# AVM "constants"
#
# procfs of MTD driver
procmtd="/proc/mtd"
# device name of MTD partition for access with character oriented I/O
mtdprefix="mtd"
# device name of MTD partitions for access with block oriented I/O
mtdblockname="mtdblock"
# prefix for inactive partition names
reservedprefix="reserved-"
# name of kernel partition
kernelname="kernel"
# name of file system partition
filesystemname="filesystem"
# name of the partition with NAND flash available to the user
nandname="nand-filesystem"
# environment file name within the TFFS procfs
envpathname="/proc/sys/urlader/environment"
# variable used to switch between boot time systems
fsvarname="linux_fs_start"
# hardware revision variable name
hwrevname="HWRevision"
# supported hardware revisions as "modfs" host
# 3370, 7490, 3390, 7362SL, 3490, 7430, 7412, 7272, 3272, 5490, 5491
hwrevs_supported="175 185 193 203 212 209 218 192 198 223 243"
# AVM's binary to modify the NAND based partitions (busybox has it's own tools, but not ooB on a device with original firmware)
update_kernel_binary="/sbin/update_kernel"
# where is the wrapper mounted at the running system ? (if any)
wrapperdir="/wrapper"
# the file name of the root file system image, if a wrapper YAFFS2 image exists
rootfsname="filesystem_core.squashfs"
# the name of a firmware image, it will be renamed during download
firmwarestoragename="firmware.image"
# the kernel image name within a firmware image
firmware_kernel_image="./var/tmp/kernel.image"
# the (outer) file system image name within a firmware image
firmware_filesystem_image="./var/tmp/filesystem.image"
# (outer) file system image file name
outerimagename="filesystem.image"
# kernel image file name
kernelfilename="kernel.image"
# the name of the busybox to be used, will be changed later
bb="/bin/busybox"
# the name of the shell on the box
shl="$bb sh"
# the name of vendor utility to "spy" into files
testvalue="/bin/testvalue"
# the name of the ring buffer utility from the vendor
debugoutput="/bin/showshringbuf -i \$scriptname"
## the name of the ring buffer utility from the vendor
debugtest="/bin/showshringbuf -?"
# our debug ring buffer file name
ringbufferfile="/var/.srb_\$scriptname"
# our custom modscript selection file name
custom_selection_file="custom_modscripts"
#
# some more values which have to be changed, if AVM modifies its firmware
#
# 128MB ext3 image plus 10 percent
free_space_for_unpack="285M"
# 48 MB for packed and double space for unpacked image
free_space_for_unpack_tmpfs="512M"
# even with a small amount of RAM at all, there should be a minimum of free space
free_space_at_tmpfs="128M"
# that's really low on space, better restart the box again
warning_space_at_tmpfs="64M"
# one more time the space needed for our ext3 container + 5%
free_space_at_nand="285M"
# the estimated space needed to store an extracted squashfs image at NAND, it's hard
# to predict a correct value, because the available 48 MB of a filesystem partition
# may contain a much much larger "expanded" structure due to automatic avoidance of
# compression for identical files - so we use a value usually large enough to contain
# up to four different brandings
warning_space_at_nand="192M"
# the estimated space needed to download a firmware image from the FTP server,
# computed as filesystem partition size + kernel partition size + security surcharge
# for additional files in the tar archive - currently the images are uncompressed
download_space_needed="128M"
# the estimated space needed to extract an outer file system from a firmware image,
# the extracted tree may be be larger than the size of a filesystem partition
extract_space_needed="48M"
# the estimated space needed to store a kernel image, an outer image (if used) and the
# extracted SquashFS image - at least during the modify_rootfs execution,
# computed as kernel partition size + 2x filesystem partition size, because it's
# possible, that (in worst case) the (outer) ext2 image with the pseudo SquashFS header
# exists together with the "cutted" image (during "dd" execution) for a short time,
# the extracted SquashFS image will be smaller than the second ext2 copy
fullimage_space_needed="256M"
# needed swap space at all (MB)
swap_space_needed="512"
# the "normal" base for temporary files and directories
tmpfsbasedir="/var/tmp"
# known native file system types, we can use them without a container
nativefilesystems="tmpfs ext2 ext3 ext4 yaffs2"
#
# error codes
#
# 32 - different MD5 hashes for kernel MTDs
# 33 - unable to find kernel MTD
# 34 - unable to find alternative kernel MTD
# 35 - not used anymore, was missing linux_fs_start at environment
# 36 - unsupported hardware revision
# 37 - system modified already, restart needed
# 38 - specified squashfs source file not found
# 39 - unable to extract outer image from firmware archive
# 40 - unable to mount outer file system
# 41 - unable to copy root image from outer filesystem
# 42 - unable to download firmware image from manufacturer
# 43 - error downloading firmware image (file size is 0)
# 44 - error copying kernel image to alternative partition
# 45 - error copying outer file system to alternative partition
# 46 - unknown error copying running system to inactive partitions
# 47 - unable to get hardware revision
# 48 - unable to find file system MTD partition
# 49 - unable to find alternative file system MTD partition
# 50 - not enough free space available at tmpfs
# 51 - unable to find free space for unpacking of squashfs
# 52 - unable to find free space for squashfs extraction from image
# 53 - error saving permanent copy of source squashfs image
# 54 - error unpacking loopback device image
# 55 - error mounting loopback device image
# 56 - error unmounting loopback device image
# 57 - error removing loopback device image
# 58 - not enough free space on any storage volume
# 60 - wrong modscript detected, missing needed comment lines
# 61 - wrong modscript detected, missing header at all
# 62 - error extracting kernel image from firmware image file
# 66 - the message file was not found after fallback to 'en'
# 127 - internal error
# 187 - unable to detect the current firmware version on the FTP server
# 190 - no newer version found for "update" mode without local source file
# 191 - error comparing version numbers (e.g. wrong format of them)
# 200 - input image is missing or invalid
# 202 - unspecified error mounting an ext2 image to extract data from it
# 205 - a downloaded image file did not pass the integrity check (signature)
# 222 - error detecting filesystem type of an image file
#
# our "internal" constants
#
modfs_version=0.7.0-beta-130220222310
modfs_comment="please look at https://github.com/PeterPawn/modfs for further info"
bindirname="bin"
localedirname="locale"
filesdirname="files"
scriptdirname="modscripts"
contribdirname="contrib"
tmpdirbase="/var/tmp"
packedpartition="256MB_ext3.gz"
squashfsdirname="squashfs-root"
scriptwrapper="wrap_script"
modfsshelldebug="/var/tmp/modfs_debug_shell.log"
scriptsdir="bin/scripts"
getversionvaluesscript="$scriptsdir/extract_version_values"
showprogress=0
msgtext_clearscreen="\x1B[2J\x1B[0;0H"
msgtext_normal="\x1B[0m"
msgtext_bold="\x1B[1m"
msgtext_error="\x1B[1;31m"
msgtext_ok="\x1B[1;32m"
msgtext_warning="\x1B[1;33m"
msgtext_highlight="\x1B[1;34m"
msgtext_CR="\r\x1B[K"
#
# name and relative path of squashfs tools
#
sq_version=4 # default version
sq_pack="\$(bindir)/mksquashfs\${sq_version}"
sq_unpack="\$(bindir)/unsquashfs\${sq_version}"
#
# universal functions
#
# check, if a list contains an item and return its index (based on 1)
# $1 - the item to look for (needle)
# $2 - the haystack
#
index_of_item()
{
local item i=0
for item in $2; do
let i+=1
[ x"$1" == x"$item" ] && echo $i && return 0
done
return 1
}
#
# get binaries subdirectory name
#
bindir() { echo "$scriptpath/$bindirname/$(get_hardware_revision)"; }
#
# get scripts subdirectory name
#
scriptdir() { echo "$scriptpath/$scriptsdir"; }
#
# get locale subdirectory name
#
localedir() { echo "$scriptpath/$localedirname"; }
#
# get files subdirectory name
#
filesdir() { echo "$scriptpath/$filesdirname"; }
#
# get contributed content subdirectory name
#
contribdir() { echo "$scriptpath/$contribdirname"; }
#
# remove temporary file
# $1 - file name
#
remove_temp_file()
{
local rc
[ -z "$1" ] && return 127
[ ${#1} -lt 10 ] && return 127
$bb rm "$1" 2>/dev/null
rc=$?
$bb sed -e "\|^rm *$1\$|d" -i $tempfilelist 2>/dev/null
debug "remove_temp_file: file=$1, rc=$rc"
return 0
}
#
# remove directory and its reference from cleanup list too
# $1 - directory to remove
#
remove_directory()
{
local dir="$1" rc
[ ${#1} -lt 10 ] && return 127
$bb rm -r $dir 2>/dev/null
rc=$?
$bb sed -e "\|^rm -r *$dir\$|d" -i $tempfilelist 2>/dev/null
debug "remove_directory: directory=$1, rc=$rc"
return 0
}
#
# get temporary directory name
#
get_temp_dir()
{
local name="$tmpdirbase/$$_$($bb date +%s)"
$bb mkdir -p "$name"
echo "$bb rm -r $name" >>$tempfilelist
debug "get_temp_dir: directory=$name"
echo "$name"
return 0
}
#
# get temporary file name
# $1 - optional base directory name
#
get_temp_file()
{
local name="$1" dir out
dir="$(get_temp_dir)"
[ -z "$name" ] && out="$dir/$($bb date +%s)" || out="$dir/$name"
echo "$bb rm $out" >>$tempfilelist
debug "get_temp_file: file=$out"
echo "$out"
return 0
}
#
# write to debug ring buffer
# stdin -> lines to append to the buffer
#
debug()
{
[ $MODFS_DEBUG -ne 1 ] && return
echo -e "$@" | $bb sed -e ':x;$!N;s/\n/{LF}/;tx' | $debugoutput
}
#
# get next system index from environment
#
get_system_switch()
{
local fsvar
fsvar=$($bb sed -n -e "s/^$fsvarname\t\([01]\)/\1/p" $envpathname)
[ -z "$fsvar" ] && fsvar="0"
echo $fsvar
}
#
# get hardware revision from environment (it has not to be a number !)
#
get_hardware_revision() { $bb sed -n -e "s/^$hwrevname\t\(.*\)/\1/p" $envpathname; }
#
# check, if the specified hardware revision is supported
# $1 - hardware revision
#
check_hardware_revision() { return $(index_of_item "$1" "$hwrevs_supported"); }
#
# check MTD "name"
# $1 - MTD index number
# $2 - expected MTD name from /proc/mtd
#
check_mtd() { $bb grep "$mtdprefix$1: [0-9a-f]* [0-9a-f]* \"\($reservedprefix\)*$2\"" $procmtd; }
#
# get MTD number by name
# $1 - requested MTD partition name
#
get_mtd_by_name() { $bb sed -n -e "s|$mtdprefix\([0-9]\{1,2\}\): [0-9a-f]\{8\} [0-9a-f]\{8\} \"$1\"|\1|p" $procmtd; }
#
# get MTD name by number
# $1 - requested MTD partition number
#
get_mtd_by_number() { $bb sed -n -e "s|$mtdprefix$1: [0-9a-f]\{8\} [0-9a-f]\{8\} \"\(.*\)\"|\1|p" $procmtd; }
#
# build MTD partition groups
#
build_partitions()
{
local g1 g2
g1=$(get_mtd_by_name $kernelname):$(get_mtd_by_name $filesystemname)
g2=$(get_mtd_by_name $reservedprefix$kernelname):$(get_mtd_by_name $reservedprefix$filesystemname)
if [ ${g1:0:1} -lt ${g2:0:1} ]; then
echo "$g1 $g2"
else
echo "$g2 $g1"
fi
}
#
# convert string to upper case
# $@ - string(s) to convert
#
uppercase() { echo "$@" | $bb tr 'abcdefghijklmnopqrstuvwxyzäöü' 'ABCDEFGHIJKLMNOPQRSTUVWXYZÄÖÜ'; }
#
# escape a string to use it within a regular expression without any hassle
#
escape_regexp() { echo "$@" | $bb sed -e 's/\./\\./g'; }
#
# get localized strings (to make it easier for german users)
# - the message text may contain the macros '%{error}', '%{ok}', '%{warning}' and
# '%{normal}' to change text color
# - to insert variable parts into the text, the 'printf' command will be used with
# the specified parameters (shifted two times to remove our own arguments)
# $1 - language index (ISO 639-1 code)
# $2 - message id
# $3-$n - values to substitute
#
get_localized()
{
local lang=$1 lcfile=$(localedir)/$lang msgno=$2 rc=0 msg
shift 2
msg="$($bb sed -n -e "/^$msgno=/s/^[0-9]*=\(.*\)/\1/p" $lcfile | $bb sed -e "s/%{error}/\${msgtext_error}/g" | $bb sed -e "s/%{ok}/\${msgtext_ok}/g" | $bb sed -e "s/%{warning}/\${msgtext_warning}/g" | $bb sed -e "s/%{bold}/\${msgtext_bold}/g" | $bb sed -e "s/%{normal}/\${msgtext_normal}/g" | $bb sed -e "s/%{highlight}/\${msgtext_highlight}/g")"
if [ "${#msg}" = "0" ]; then
echo "The specified message number $msgno was not found at the language file for '$lang'." 1>&2
rc=1
else
eval "printf \"$msg\" "$@""
fi
return $rc
}
#
# get a yes or no decision from the user
# $1 - default answer to assume, if only return is pressed
# $2 - the question to display first
# - to avoid a default answer (return key), use any other default than 'y' or 'n'
#
ask_yes_or_no()
{
local def=$1 yes no p_yes p_no answer nl prompt="$2"
yes=$(get_localized $lang 129)
no=$(get_localized $lang 130)
cancel=$(get_localized $lang 227)
p_yes=$yes
p_no=$no
p_cancel="$(get_localized $lang 228)"
if [ $def == n ]; then
p_no=$(uppercase $no)
else
if [ $def == y ]; then
p_yes=$(uppercase $yes)
fi
fi
# 1 -eq 1 is better than 'true', because 'true' is not an ash builtin in every case
debug "ask_yes_or_no: Q=$prompt"
while [ 1 -eq 1 ]; do
while read -n 10 -s -t 1; do :; done
echo -ne "$prompt" 1>&2
read -n 1 -s -p " ($p_yes/$p_no/$p_cancel) " answer 1>&2
nl="$answer\n"
[ ${#answer} -eq 0 ] && answer=$def && nl="\n"
debug "ask_yes_or_no: A=$answer"
if [ "$answer" == $(uppercase $yes) -o $answer == $yes ]; then
echo -n 'Y'
echo -e -n "$nl" 1>&2
return 0
elif [ "$answer" == $(uppercase $no) -o $answer == $no ]; then
echo -n 'N'
echo -e -n "$nl" 1>&2
return 0
elif [ "$answer" == $(uppercase $cancel) -o $answer == $cancel ]; then
echo -n 'C'
echo -e -n "$nl" 1>&2
return 1
else
echo -e "$selection\n$(get_localized $lang 128)" 1>&2
fi
done
return 1
}
#
# show progress messages on console
# - output will be written to stderr
# $1 - message type
# 1 - CR + show text without LF
# 2 - show text without LF
# 3 - show text with LF
# 4 - show text with LF in front of it and at the end
# $2 - message id to get localized text version
#
progress()
{
local msg mode=$1
shift
msg="$(get_localized $lang "$@")"
if [ $mode -eq 1 ]; then
echo -ne "$msgtext_CR$msg" 1>&2
else
if [ $mode -eq 2 ]; then
echo -ne "$msg" 1>&2
else
if [ $mode -eq 3 ]; then
echo -ne "$msg\n" 1>&2
else
if [ $mode -eq 4 ]; then
echo -ne "\n$msg\n"
fi
fi
fi
fi
debug "progress: mode=$mode, msg=$msg"
return
}
#
# check next system against running
#
is_switched()
{
local nxt kernel filesys kname fname switched=1
nxt=$(get_system_switch)
set -- $(build_partitions)
[ $nxt -gt 0 ] && shift
kernel=${1%:*}
filesys=${1#*:}
kname="$(get_mtd_by_number $kernel)"
fname="$(get_mtd_by_number $filesys)"
[ "${kname:0:${#reservedprefix}}" == "$reservedprefix" ] && switched=0
return $switched
}
#
# compare kernel checksums to make sure, the systems are identical
# $1 and $2 have to be the MTD numbers of the two kernel images
#
check_kernels()
{
local rc=0
if [ ${#1} -eq 0 -o ${#2} -eq 0 ];then
rc=127
else
hash0=$($bb md5sum /dev/$mtdblockname$1 | $bb sed -n -e 's/^\([0-9a-f]*\).*/\1/p')
hash1=$($bb md5sum /dev/$mtdblockname$2 | $bb sed -n -e 's/^\([0-9a-f]*\).*/\1/p')
debug "check_kernels: /dev/$mtdblockname$1 = $hash0, /dev/$mtdblockname$2 = $hash1"
if [ $hash0 != $hash1 ]; then
rc=32
fi
fi
return $rc
}
#
# call mksquashfs utility
#
sq_mksquashfs()
{
local rc=0 binary
binary="$(eval echo $sq_pack)"
debug "sq_mksquashfs: $binary $@"
$binary "$@"
rc=$?
debug "sq_mksquashfs: exiting, rc=$rc"
return $rc
}
#
# call unsquashfs utility
#
sq_unsquashfs()
{
local rc=0 binary
binary="$(eval echo $sq_unpack)"
debug "sq_unsquashfs: $binary $@"
$binary "$@"
rc=$?
debug "sq_unsquashfs: exiting, rc=$rc"
return $rc
}
#
# switch system selection variable to other value
#
switch_system()
{
local newval
newval=$(( ( $(get_system_switch) + 1 ) % 2 ))
echo $fsvarname $newval >$envpathname
debug "switch_system: switched to $newval"
}
#
# switch next boot time selection to specified system, if action is really needed
# $1 - 'running' / 'alternative' to switch to the specified system based on the running version
#
switch_system_to()
{
local next
next=$(get_system_switch)
debug "switch_system_to: $1"
if is_switched; then
if [ x"$1" == xcurrent ]; then
switch_system
fi
else
if [ x"$1" == xalternative ]; then
switch_system
fi
fi
return 0
}
#
# detect filesystem image type
# types supported: squashfs3, squashfs4, ext2, sqfs_dummy256_{type}, with "-de" suffix if different endianess detected
# $1 - source image
#
detect_image_filesystem()
{
local src="$1" rc=222 fstype major sig offset=${2:-0}
# do not use blkid anymore to avoid confusions from different versions
# instead we'll probe at different offsets to detect/guess the right type
[ -f "$src" ] || return $rc
sig=$($testvalue "$src" 4 $offset)
[ $? -ne 0 ] && return $rc
major=$($testvalue "$src" 2 $(( offset + 28 )))
[ $? -ne 0 ] && return $rc
if [ $sig == 1936814952 ]; then
# sqsh signature found at offset 0
if [ $major -ne 0 ]; then
fstype="squashfs$major"
else
if [ $offset -eq 0 ]; then
# recursive call with offset 256
sig="$(detect_image_filesystem "$src" 256)"
if [ $? -eq 0 ]; then
fstype="sqfs_dummy256_$sig"
fi
fi
fi
elif [ $sig == 1752396147 ]; then
# different endian signature found at offset 0
if [ $major -ne 0 ]; then
fstype="squashfs${major}-de"
fi
else
sig=$($testvalue "$src" 2 $(( offset + 1080 )))
if [ $sig -eq 21487 ]; then
fstype="ext2"
fi
fi
[ ${#fstype} -gt 0 ] && rc=0
echo $fstype
debug "detect_image_filesystem: src=$src, offset=$offset, fstype=$fstype, rc=$rc"
return $rc
}
#
# copy kernel image to alternative partition
# $1 - optional file name of the new kernel image - if omitted, the current kernel will be copied
#
copy_kernel_image()
{
local src="$1" target rc
if [ ${#src} -eq 0 ]; then
src=$(get_mtd_by_name $kernelname)
src="/dev/$mtdprefix$src"
fi
target=$(get_mtd_by_name $reservedprefix$kernelname)
debug "copy_kernel_image: src=$src, target=/dev/$mtdprefix$target"
$update_kernel_binary -i "$src" -o /dev/$mtdprefix$target >/dev/null 2>&1
rc=$?
debug "copy_kernel_image: exiting, rc=$rc"
return $rc
}
#
# copy outer file system to alternative partition
#
copy_filesystem()
{
local tmp target rc
target=$(get_mtd_by_name $reservedprefix$filesystemname)
$update_kernel_binary -o /dev/$mtdprefix$target >/dev/null 2>&1
debug "copy_filesystem: /dev/$mtdprefix$target cleared"
tmp=$(get_temp_dir)
$bb mount -t yaffs2 /dev/$mtdblockname$target "$tmp"
$bb cp -R $wrapperdir/* $tmp/
rc=$?
debug "copy_filesystem: copied everything from $tmp, rc=$rc"
$bb umount "$tmp"
remove_directory "$tmp"
debug "copy_filesystem: exiting, rc=$rc"
return $rc
}
#
# copy running system to alternative partitions
#
copy_running_system()
{
local rc
# prepare MTD writes
# notify power management
echo MODE=update > /dev/avm_power
# prevent unwanted watchdog restarts, may be necessary but update is very fast
# echo "disable" > /dev/watchdog
copy_kernel_image
rc=$?
if [ $rc -ne 0 ]; then
rc=44
else
copy_filesystem
rc=$?
if [ $rc -ne 0 ]; then
rc=45
fi
fi
debug "copy_running_system: exiting, rc=$rc"
return $rc
}
#
# copy new outer file system
# $1 - source file system image
# $2 - root file system image name to be excluded from copying
#
copy_outer_filesystem()
{
local rc target src="$1" tmp fstype mrc=0 kernelversion
target=$(get_mtd_by_name $reservedprefix$filesystemname)
# prepare MTD writes
# notify power management
echo MODE=update > /dev/avm_power
# prevent unwanted watchdog restarts, may be necessary but update is very fast
# echo "disable" > /dev/watchdog
# clear filesystem first
debug "copy_outer_filesystem: src=$src, rootfs=$rootfsname"
$update_kernel_binary -o /dev/$mtdprefix$target >/dev/null 2>&1
rc=$?
debug "copy_outer_filesystem: clearing target device /dev/$mtdprefix$target, rc=$rc"
if [ $rc -ne 0 ]; then
rc=44
else
fstype=$(detect_image_filesystem "$src")
rc=$?
if [ $rc -eq 0 ]; then
# mount squashfs and yaffs2 partition and copy from one to the other
tmp="$(get_temp_dir)"
$bb mkdir -p "$tmp/yaffs" "$tmp/outerfs"
$bb mount -t yaffs2 /dev/$mtdblockname$target "$tmp/yaffs"
if [ "$fstype" == "ext2" -o "$fstype" == "sqfs_dummy256_ext2" ]; then
# ext2 image with AVM's dummy header
mount_ext2_image "$src" "$tmp/outerfs" "$fstype"
rc=$?
mrc=$rc
else
$bb mount "$src" "$tmp/outerfs" 2>/dev/null
rc=$?
mrc=$rc
if [ $rc -ne 0 ]; then
# try to extract with unsquashfs3, if this is a 3.xx kernel based
# system without knowledge about SquashFS3 format while mounting
kernelversion=$($bb uname -r)
kernelversion=${kernelversion%%.*}
if [ $kernelversion -eq 3 -a x"$fstype" == x"squashfs3" ]; then
unpack_squashfs "$src" "$tmp" 2>&1 >/dev/null
rc=$?
if [ $rc -eq 0 ]; then
$bb rmdir "$tmp/outerfs"
$bb mv "$tmp/$squashfsdirname" "$tmp/outerfs"
rc=$?
$bb rm "$tmp/outerfs/$rootfsname"
fi
fi
fi
fi
if [ $rc -eq 0 ]; then
$bb tar -c -O -C "$tmp/outerfs" --exclude=$rootfsname . | $bb tar -x -C "$tmp/yaffs"
rc=$?
debug "copy_outer_filesystem: copying done, rc=$rc"
if [ -n "$ADD_TO_WRAPPER" ]; then
ADD_TO_WRAPPER="$(eval printf "%s" "$ADD_TO_WRAPPER")"
if [ -d "$ADD_TO_WRAPPER" ]; then
debug "copy_outer_filesystem: subdirectory '$ADD_TO_WRAPPER' exists, copying content to the new wrapper partition"
cp -a $ADD_TO_WRAPPER/* $tmp/yaffs/
rc=$?
debug "copy_outer_filesystem: add_to_wrapper directory '$ADD_TO_WRAPPER' copied, rc=$rc"
else
debug "copy_outer_filesystem: add_to_wrapper directory '$ADD_TO_WRAPPER' not found"
fi
fi
[ $mrc -eq 0 ] && $bb umount -d "$tmp/outerfs"
$bb umount "$tmp/yaffs"
remove_directory "$tmp"
rc=0
fi
fi
fi
debug "copy_outer_filesystem: exiting, rc=$rc"
return $rc
}
#
# copy new root file system to alternative YAFFS2 partition
# $1 - file name of new root file system image
#
copy_new_root_filesystem()
{
local src="$1" target tmp
target=$(get_mtd_by_name $reservedprefix$filesystemname)
tmp="$(get_temp_dir)"
debug "copy_new_root_filesystem: src=$src, target=/dev/$mtdblockname$target"
$bb mount -t yaffs2 /dev/$mtdblockname$target "$tmp"
$bb cp -a "$src" "$tmp/$rootfsname"
rc=$?
$bb umount "$tmp"
remove_directory "$tmp"
debug "copy_new_root_filesystem: exiting, rc=$rc"
return $rc
}
#
# get squash file system block size
# $1 - source file system name
#
get_squashfs_blocksize()
{
local bs sq_version
sq_version=$(get_squashfs_tools_version "$1")
debug "get_squashfs_blocksize: using SquashFS version $sq_version"
bs=$(sq_unsquashfs -s "$1" 2>/dev/null | $bb sed -n -e "s/^Block size \(.*\)/\1/p")
debug "get_squashfs_blocksize: block size=$bs"
echo $bs
}
#
# get squash file system block size
# $1 - source file system name
#
get_squashfs_endianess()
{
local endianess=0 endian sq_version
sq_version=$(get_squashfs_tools_version "$1")
debug "get_squashfs_endianess: using SquashFS version $sq_version"
endian=$(sq_unsquashfs -s "$1" 2>/dev/null | $bb sed -n -e "s/Found a valid \(big\|little\) endian SQUASHFS.*/\1/p")
[ ${#endian} -gt 0 ] && [ x"$endian" == xlittle ] && endianess=1
debug "get_squashfs_endianess: $endian endian"
echo $endianess
return 0
}
#
# unpack squash file system
# $1 - source file system name
# $2 - target directory (has to exist)
# $3 - optional file with list of names to unpack
#
unpack_squashfs()
{
local src="$1" target="$2" files="$3" popd rc sq_version
if [ -r "$src" ]; then
sq_version=$(get_squashfs_tools_version "$src")
debug "unpack_squashfs: using SquashFS version $sq_version"
[ -z "$files" ] || files="-e $files"
popd="$(pwd)"
cd "$target"
sq_unsquashfs -info "$src" $files
rc=$?
cd "$popd"
else
rc=38
fi
debug "unpack_squashfs: exiting, rc=$rc"
return $rc
}
#
# pack squash file system image from source tree
# $1 - source directory
# $2 - target file name
# $3 - endianess (0 - BE, 1 - LE)
# $4 - block size
#
pack_squashfs()
{
local src="$1" target="$2" endian blocksize="$4" popd rc sq_version=$5
if [ $sq_version -eq 3 ]; then
[ $3 -eq 0 ] && endian="-be" || endian="-le"
else
endian=""
fi
popd="$(pwd)"
debug "pack_squashfs: using SquashFS version $sq_version"
cd "$src"
echo $modfs_version > squashfs-root/etc/.modfs_version
sq_mksquashfs squashfs-root "$target" -info -b $blocksize $endian -force-uid 0 -force-gid 0
rc=$?
cd "$popd"
debug "pack_squashfs: exiting, rc=$rc"
return $rc
}
#
# check, if an option is supported
# $1 - option to look for
# $2 - options from script
is_supported()
{
local option="$1" options="$2" opt rc=0
for opt in $options; do
curr="$opt"
if [ $(expr index "\(" "$opt") -gt 0 ]; then
opt="${opt%%(*)}"
fi
if [ x"$opt" == x"$option" ]; then
echo "$curr"
rc=1
break
fi
done
debug "is_supported: option=$option, from=$options, rc=$rc"
return $rc
}
#
# get version values from unpacked image
# $1 - target directory
#
extract_values_from_image()
{
$bb sh $getversionvaluesscript "$1" -m MODFS_
}
#
# get the kernel version from target system
# $1 - target directory
get_target_kernel_version()
{
local rootdir="$1"
local rc=0
local version
version="$(extract_values_from_image "$rootdir" | $bb sed -n -e "s|^MODFS_KernelVersion=\"\(.*\)\"\$|\1|p")"
debug "get_target_kernel_version: result=\"$version\", rc=$rc"
echo "TARGET_KERNEL_VERSION=\"$version\""
}
#
# get the FRITZ!OS version from target system
# $1 - target directory
get_target_system_version()
{
local rootdir="$1"
local rc=0
local version
local subversion
local date
local values
values="$(extract_values_from_image "$rootdir")"
version="$(printf "%s\n" "$values" | $bb sed -n -e "s|^MODFS_Version=\"\(.*\)\"\$|\1|p")"
subversion="$(printf "%s\n" "$values" | $bb sed -n -e "s|^MODFS_Subversion=\"\(.*\)\"\$|\1|p")"
date="$(printf "%s\n" "$values" | $bb sed -n -e "s|^MODFS_Date=\"\(.*\)\"\$|\1|p")"
debug "get_target_system_version: version=\"$version\", subversion=\"$subversion\", date=\"$date\", rc=$rc"
echo "TARGET_SYSTEM_VERSION=\"$version\" TARGET_SYSTEM_SUBVERSION=\"$subversion\" TARGET_SYSTEM_DATE=\"$date\""
}
#
# get the FRITZ!OS brandings from target system
# $1 - target directory
get_target_brandings()
{
local rootdir="$1"
local rc=0
local brandings
brandings="$(extract_values_from_image "$rootdir" | $bb sed -n -e "s|^MODFS_Brandings=\"\(.*\)\"\$|\1|p")"
debug "get_target_brandings: brandings=\"$brandings\", rc=$rc"
printf "%s\n" "$brandings"
}
#
# get the FRITZ!OS brandings from target system
# $1 - target directory
get_first_branding()
{
local brandings="$1"
for branding in $brandings; do
debug "get_first_branding: brandings=\"$brandings\", branding=\"$branding\", rc=$rc"
printf "%s\n" "$branding"
return
done
}
#
# execute a modscript without further user interaction
# $1 - script name
# $2 - root file system directory
# $3 - mode (auto / onrequest)
#
execute_modscript()
{
local script="$1" scriptname="${script##*/}" rootdir="$2" mode="$3" rc=0 supports name language uselang languages header opt msg
debug "execute_modscript: script=$script, root=$rootdir, mode=$mode"
header="$($bb sed -n -e "1p" "$script")"
if [ x"$header" == x"# MODFS_MODSCRIPT" ]; then
supports="$($bb sed -n -e "s/^# SUPPORTS \(.*\)/\1/p" "$script")"
name="$($bb sed -n -e "s/^# NAME \(.*\)/\1/p" "$script")"
name="${name// /\\ }"
if [ ${#name} -gt 0 -a ${#supports} -gt 0 ]; then
if [ x"$mode" == xauto ]; then
echo -e "$(get_localized $lang 172 "$name")" 1>&2
progress 1 173
fi
language="$(is_supported 'language' "$supports")"
if [ $? -eq 1 ]; then
languages="${language##language(}"
languages="${languages%)}"
uselang=$(IFS=, set -- $languages; for lng in $@; do [ $lng == $lang ] && echo $lng && break; done)
if [ ${#uselang} -eq 0 ]; then
[ x"$mode" == xauto ] && progress 3 174
uselang=en
else
[ x"$mode" == xauto ] && progress 3 96
fi
else
[ x"$mode" == xauto ] && progress 3 174
uselang=en
fi
if [ x"$mode" == xauto -o x"$mode" == xprecheck ]; then
rc=0
progress 1 175
opt=$(is_supported 'precheck' "$supports")
if [ $? -eq 1 ]; then
# execute pre check
msg="$(eval export $MODSCRIPT_ENV;$shl $scriptwrapper $script $uselang $rootdir $mode precheck)"
rc=$?
if [ $rc -gt 0 ]; then
progress 3 177 $rc
echo -e "${msgtext_bold}$msg${msgtext_normal}" 1>&2
else
progress 3 96
[ ${#msg} -gt 0 ] && echo -e "${msgtext_bold}$msg${msgtext_normal}" 1>&2
fi
else
progress 3 176
fi
if [ x"$mode" == xprecheck ]; then
return $rc
fi
else
rc=0
fi
if [ $rc -eq 0 ]; then
progress 1 178
msg="$(eval export $MODSCRIPT_ENV;$shl $scriptwrapper $script $uselang $rootdir $mode install)"
rc=$?
if [ $rc -gt 0 ]; then
progress 3 177 $rc
echo -e "${msgtext_bold}$msg${msgtext_normal}" 1>&2
else
progress 3 96
[ ${#msg} -gt 0 ] && echo -e "${msgtext_bold}$msg${msgtext_normal}" 1>&2
progress 1 179
opt=$(is_supported 'postcheck' "$supports")
if [ $? -eq 1 ]; then
# execute post check
msg="$(eval export $MODSCRIPT_ENV;$shl $scriptwrapper $script $uselang $rootdir $mode postcheck)"
rc=$?
if [ $rc -gt 0 ]; then
progress 3 177 $rc
echo -e "${msgtext_bold}$msg${msgtext_normal}" 1>&2
else
progress 3 96
[ ${#msg} -gt 0 ] && echo -e "${msgtext_bold}$msg${msgtext_normal}" 1>&2
fi
else
progress 3 176
fi
fi
fi