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initial commit
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longpanda
154
IMG/cpio/ventoy/init
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154
IMG/cpio/ventoy/init
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#!/ventoy/busybox/sh
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#************************************************************************************
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# Copyright (c) 2020, longpanda <admin@ventoy.net>
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation; either version 3 of the
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# License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, see <http://www.gnu.org/licenses/>.
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#
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#************************************************************************************
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###################################################################
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# #
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# Step 1 : parse kernel debug parameter #
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# #
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####################################################################
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mkdir /proc; mount -t proc proc /proc
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vtcmdline=$(cat /proc/cmdline)
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vtkerver=$(cat /proc/version)
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umount /proc; rm -rf /proc
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echo "kenel version=$vtkerver" >>$VTLOG
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echo "kenel cmdline=$vtcmdline" >>$VTLOG
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#break here for debug
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if [ "$VTOY_BREAK_LEVEL" = "01" ] || [ "$VTOY_BREAK_LEVEL" = "11" ]; then
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sleep 5
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echo -e "\n\n\033[32m ################################################# \033[0m"
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echo -e "\033[32m ################ VENTOY DEBUG ################### \033[0m"
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echo -e "\033[32m ################################################# \033[0m \n"
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if [ "$VTOY_BREAK_LEVEL" = "11" ]; then
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cat $VTLOG
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fi
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exec $BUSYBOX_PATH/sh
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fi
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####################################################################
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# #
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# Step 2 : extract real initramfs to / #
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# #
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####################################################################
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cd /
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rm -rf /init /linuxrc /sbin /dev/ /root
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ventoy_is_initrd_ramdisk() {
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#As I known, PCLinuxOS use ramdisk
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if echo $vtkerver | grep -i -q 'PCLinuxOS'; then
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true
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else
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false
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fi
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}
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# param: file skip magic tmp
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ventoy_unpack_initramfs() {
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vtfile=$1; vtskip=$2; vtmagic=$3; vttmp=$4
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echo "=====ventoy_unpack_initramfs: #$*#" >> $VTLOG
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for vtx in '1F8B zcat' '1F9E zcat' '425A bzcat' '5D00 lzcat' 'FD37 xzcat' '894C lzopcat' '0221 lz4cat' '28B5 zstdcat' '3037 cat'; do
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if [ "${vtx:0:4}" = "${vtmagic:0:4}" ]; then
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echo "vtx=$vtx" >> $VTLOG
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if [ $vtskip -eq 0 ]; then
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${vtx:5} $vtfile | (cpio -idm 2>>$VTLOG; cat > $vttmp)
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else
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dd if=$vtfile skip=$vtskip iflag=skip_bytes status=none | ${vtx:5} | (cpio -idm 2>>$VTLOG; cat > $vttmp)
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fi
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break
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fi
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done
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}
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# param: file magic tmp
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ventoy_unpack_initrd() {
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vtfile=$1; vtmagic=$2; vttmp=$3
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echo "=====ventoy_unpack_initrd: #$*#" >> $VTLOG
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for vtx in '1F8B zcat' '1F9E zcat' '425A bzcat' '5D00 lzcat' 'FD37 xzcat' '894C lzopcat' '0221 lz4cat' '28B5 zstdcat' '3037 cat'; do
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if [ "${vtx:0:4}" = "${vtmagic:0:4}" ]; then
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echo "vtx=$vtx" >> $VTLOG
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${vtx:5} $vtfile > $vttmp
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break
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fi
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done
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}
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# This export is for busybox cpio command
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export EXTRACT_UNSAFE_SYMLINKS=1
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for vtfile in $(ls /initrd*); do
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#decompress first initrd
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vtmagic=$(hexdump -n 2 -e '2/1 "%02X"' $vtfile)
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if ventoy_is_initrd_ramdisk; then
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ventoy_unpack_initrd $vtfile $vtmagic ${vtfile}_tmp
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mv ${vtfile}_tmp $vtfile
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break
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else
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ventoy_unpack_initramfs $vtfile 0 $vtmagic ${vtfile}_tmp
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fi
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#only for cpio,cpio,...,initrd sequence, initrd,cpio or initrd,initrd sequence is not supported
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while [ -e ${vtfile}_tmp ] && [ $(stat -c '%s' ${vtfile}_tmp) -gt 512 ]; do
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mv ${vtfile}_tmp $vtfile
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vtdump=$(hexdump -n 512 -e '512/1 "%02X"' $vtfile)
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vtmagic=$(echo $vtdump | sed 's/^\(00\)*//')
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let vtoffset="(${#vtdump}-${#vtmagic})/2"
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if [ -z "$vtmagic" ]; then
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echo "terminate with all zero data file" >> $VTLOG
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break
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fi
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ventoy_unpack_initramfs $vtfile $vtoffset ${vtmagic:0:4} ${vtfile}_tmp
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done
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rm -f $vtfile ${vtfile}_tmp
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done
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#break here for debug
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if [ "$VTOY_BREAK_LEVEL" = "02" ] || [ "$VTOY_BREAK_LEVEL" = "12" ]; then
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sleep 5
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echo -e "\n\n\033[32m ################################################# \033[0m"
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echo -e "\033[32m ################ VENTOY DEBUG ################### \033[0m"
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echo -e "\033[32m ################################################# \033[0m \n"
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if [ "$VTOY_BREAK_LEVEL" = "12" ]; then
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cat $VTOY_PATH/log
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fi
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exec $BUSYBOX_PATH/sh
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fi
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####################################################################
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# #
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# Step 3 : Hand over to ventoy.sh #
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# #
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####################################################################
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echo "Now hand over to ventoy.sh" >>$VTLOG
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. $VTOY_PATH/tool/vtoytool_install.sh
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export PATH=$VTOY_ORG_PATH
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exec $BUSYBOX_PATH/sh $VTOY_PATH/ventoy.sh
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