IMG/cpio/ventoy/hook/ventoy-hook-lib.sh

   1 #!/ventoy/busybox/sh
   2 #************************************************************************************
   3 # Copyright (c) 2020, longpanda <admin@ventoy.net>
   4 #
   5 # This program is free software; you can redistribute it and/or
   6 # modify it under the terms of the GNU General Public License as
   7 # published by the Free Software Foundation; either version 3 of the
   8 # License, or (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful, but
  11 # WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 # General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program; if not, see <http://www.gnu.org/licenses/>.
  17 #
  18 #************************************************************************************
  19
  20 VTOY_PATH=/ventoy
  21 BUSYBOX_PATH=$VTOY_PATH/busybox
  22 VTLOG=$VTOY_PATH/log
  23 FIND=$BUSYBOX_PATH/find
  24 GREP=$BUSYBOX_PATH/grep
  25 EGREP=$BUSYBOX_PATH/egrep
  26 CAT=$BUSYBOX_PATH/cat
  27 AWK=$BUSYBOX_PATH/awk
  28 SED=$BUSYBOX_PATH/sed
  29 SLEEP=$BUSYBOX_PATH/sleep
  30 HEAD=$BUSYBOX_PATH/head
  31 VTOY_DM_PATH=/dev/mapper/ventoy
  32 VTOY_DEBUG_LEVEL=$($BUSYBOX_PATH/hexdump -n 1 -s 450 -e '1/1 "%02x"' $VTOY_PATH/ventoy_os_param)
  33
  34 if [ "$VTOY_DEBUG_LEVEL" = "01" ]; then
  35     if [ -e /dev/console ]; then
  36         VTLOG=/dev/console
  37     fi
  38 fi
  39
  40 vtlog() {
  41     if [ "$VTLOG" = "$VTOY_PATH/log" ]; then
  42         echo "$*" >>$VTLOG
  43     else
  44         echo -e "\033[32m $* \033[0m" > $VTLOG
  45         $SLEEP 2
  46     fi
  47 }
  48
  49 vterr() {
  50     if [ "$VTLOG" = "$VTOY_PATH/log" ]; then
  51         echo "$*" >>$VTLOG
  52     else
  53         echo -e "\n\033[31m $* \033[0m" > $VTLOG
  54         $SLEEP 30
  55     fi
  56 }
  57
  58
  59 is_ventoy_hook_finished() {
  60         [ -e $VTOY_PATH/hook_finish ]
  61 }
  62
  63 set_ventoy_hook_finish() {
  64         echo 'Y' > $VTOY_PATH/hook_finish
  65 }
  66
  67 get_ventoy_disk_name() {
  68     line=$($VTOY_PATH/tool/vtoydump -f /ventoy/ventoy_os_param)
  69     if [ $? -eq 0 ]; then
  70         echo ${line%%#*}
  71     else
  72         echo "unknown"
  73     fi
  74 }
  75
  76 get_ventoy_iso_name() {
  77         line=$($VTOY_PATH/tool/vtoydump -f /ventoy/ventoy_os_param)
  78     if [ $? -eq 0 ]; then
  79         echo ${line##*#}
  80     else
  81         echo "unknown"
  82     fi
  83 }
  84
  85 wait_for_usb_disk_ready() {
  86         while [ -n "Y" ]; do
  87                 usb_disk=$(get_ventoy_disk_name)
  88         vtlog "wait_for_usb_disk_ready $usb_disk ..."
  89
  90         if echo $usb_disk | $EGREP -q "nvme|mmc"; then
  91             vtpart2=${usb_disk}p2
  92         else
  93             vtpart2=${usb_disk}2
  94         fi
  95
  96         if [ -e "${vtpart2}" ]; then
  97             vtlog "wait_for_usb_disk_ready $usb_disk finish"
  98                         break
  99                 else
 100                         $SLEEP 0.3
 101                 fi
 102         done
 103 }
 104
 105 is_ventoy_disk() {
 106     if $VTOY_PATH/tool/vtoydump -f $VTOY_PATH/ventoy_os_param -c "$1"; then
 107         $BUSYBOX_PATH/true
 108     else
 109         $BUSYBOX_PATH/false
 110     fi
 111 }
 112
 113 not_ventoy_disk() {
 114     if echo $1 | $EGREP -q "nvme.*p$|mmc.*p$"; then
 115         vtDiskName=${1:0:-1}
 116     else
 117         vtDiskName=$1
 118     fi
 119
 120     if $VTOY_PATH/tool/vtoydump -f $VTOY_PATH/ventoy_os_param -c "$vtDiskName"; then
 121         $BUSYBOX_PATH/false
 122     else
 123         $BUSYBOX_PATH/true
 124     fi
 125 }
 126
 127 ventoy_get_vblade_bin() {
 128     if $VTOY_PATH/tool/vblade_64 -t >>$VTLOG 2>&1; then
 129         echo $VTOY_PATH/tool/vblade_64
 130     else
 131         echo $VTOY_PATH/tool/vblade_32
 132     fi
 133 }
 134
 135 ventoy_find_bin_path() {
 136     if $BUSYBOX_PATH/which "$1" > /dev/null; then
 137         $BUSYBOX_PATH/which "$1"; return
 138     fi
 139
 140     for vt_path in '/bin' '/sbin' '/usr/bin' '/usr/sbin' '/usr/local/bin' '/usr/local/sbin' '/root/bin'; do
 141         if [ -e "$vt_path/$1" ]; then
 142             echo "$vt_path/$1"; return
 143         fi
 144     done
 145
 146     echo ""
 147 }
 148
 149
 150 ventoy_find_bin_run() {
 151     vtsudo=0
 152     if [ "$1" = "sudo" ]; then
 153         shift
 154         vtsudo=1
 155     fi
 156
 157     vtbinpath=$(ventoy_find_bin_path "$1")
 158     if [ -n "$vtbinpath" ]; then
 159         shift
 160
 161         if [ $vtsudo -eq 0 ]; then
 162             vtlog "$vtbinpath $*"
 163             $vtbinpath $*
 164         else
 165             vtlog "sudo $vtbinpath $*"
 166             sudo $vtbinpath $*
 167         fi
 168     fi
 169 }
 170
 171 ventoy_get_module_postfix() {
 172     vtKerVer=$($BUSYBOX_PATH/uname -r)
 173     vtLine=$($FIND /lib/modules/$vtKerVer/ -name *.ko* | $HEAD -n1)
 174     vtComp=${vtLine##*/*.ko}
 175     echo "ko$vtComp"
 176 }
 177
 178 ventoy_check_dm_module() {
 179     if $GREP -q 'device-mapper' /proc/devices; then
 180         $BUSYBOX_PATH/true; return
 181     fi
 182
 183     vtlog "device-mapper NOT found in /proc/devices, try to load kernel module"
 184     $BUSYBOX_PATH/modprobe dm_mod >>$VTLOG 2>&1
 185     $BUSYBOX_PATH/modprobe dm-mod >>$VTLOG 2>&1
 186
 187     if ! $GREP -q 'device-mapper' /proc/devices; then
 188         vtlog "modprobe failed, now try to insmod ko..."
 189
 190         $FIND /lib/modules/ -name "dm-mod.ko*" | while read vtline; do
 191             vtlog "insmode $vtline "
 192             $BUSYBOX_PATH/insmod $vtline >>$VTLOG 2>&1
 193         done
 194     fi
 195
 196     if $GREP -q 'device-mapper' /proc/devices; then
 197         vtlog "device-mapper found in /proc/devices after retry"
 198         $BUSYBOX_PATH/true; return
 199     else
 200         vtlog "device-mapper still NOT found in /proc/devices after retry"
 201         $BUSYBOX_PATH/false; return
 202     fi
 203 }
 204
 205 create_ventoy_device_mapper() {
 206     vtlog "create_ventoy_device_mapper $*"
 207
 208     VT_DM_BIN=$(ventoy_find_bin_path dmsetup)
 209     if [ -z "$VT_DM_BIN" ]; then
 210         vtlog "no dmsetup avaliable, lastly try inbox dmsetup"
 211         VT_DM_BIN=$VTOY_PATH/tool/dmsetup
 212     fi
 213
 214     vtlog "dmsetup avaliable in system $VT_DM_BIN"
 215
 216     if ventoy_check_dm_module "$1"; then
 217         vtlog "device-mapper module check success"
 218     else
 219         vterr "Error: no dm module avaliable"
 220     fi
 221
 222     $VTOY_PATH/tool/vtoydm -p -f $VTOY_PATH/ventoy_image_map -d $1 > $VTOY_PATH/ventoy_dm_table
 223     if [ -z "$2" ]; then
 224         $VT_DM_BIN create ventoy $VTOY_PATH/ventoy_dm_table >>$VTLOG 2>&1
 225     else
 226         $VT_DM_BIN "$2" create ventoy $VTOY_PATH/ventoy_dm_table >>$VTLOG 2>&1
 227     fi
 228 }
 229
 230 create_persistent_device_mapper() {
 231     vtlog "create_persistent_device_mapper $*"
 232
 233     VT_DM_BIN=$(ventoy_find_bin_path dmsetup)
 234     if [ -z "$VT_DM_BIN" ]; then
 235         vtlog "no dmsetup avaliable, lastly try inbox dmsetup"
 236         VT_DM_BIN=$VTOY_PATH/tool/dmsetup
 237     fi
 238
 239     vtlog "dmsetup avaliable in system $VT_DM_BIN"
 240
 241     if ventoy_check_dm_module "$1"; then
 242         vtlog "device-mapper module check success"
 243     else
 244         vterr "Error: no dm module avaliable"
 245     fi
 246
 247     $VTOY_PATH/tool/vtoydm -p -f $VTOY_PATH/ventoy_persistent_map -d $1 > $VTOY_PATH/persistent_dm_table
 248     $VT_DM_BIN create vtoy_persistent $VTOY_PATH/persistent_dm_table >>$VTLOG 2>&1
 249 }
 250
 251
 252
 253 wait_for_ventoy_dm_disk_label() {
 254     DM=$($BUSYBOX_PATH/readlink $VTOY_DM_PATH)
 255     vtlog "wait_for_ventoy_dm_disk_label $DM ..."
 256
 257     for i in 0 1 2 3 4 5 6 7 8 9; do
 258         vtlog "i=$i ####### ls /dev/disk/by-label/"
 259         ls -l /dev/disk/by-label/ >> $VTLOG
 260
 261         if ls -l /dev/disk/by-label/ | $GREP -q "$DM"; then
 262             break
 263         else
 264             $SLEEP 1
 265         fi
 266     done
 267 }
 268
 269 install_udeb_pkg() {
 270     if ! [ -e "$1" ]; then
 271         $BUSYBOX_PATH/false
 272         return
 273     fi
 274
 275     if [ -d /tmp/vtoy_udeb ]; then
 276         $BUSYBOX_PATH/rm -rf /tmp/vtoy_udeb
 277     fi
 278
 279     $BUSYBOX_PATH/mkdir -p /tmp/vtoy_udeb
 280     $BUSYBOX_PATH/cp -a "$1" /tmp/vtoy_udeb/
 281
 282     CURDIR=$($BUSYBOX_PATH/pwd)
 283     cd /tmp/vtoy_udeb
 284
 285     $BUSYBOX_PATH/ar x "$1"
 286
 287     if [ -e 'data.tar.gz' ]; then
 288         $BUSYBOX_PATH/tar -xzf data.tar.gz -C /
 289     elif [ -e 'data.tar.xz' ]; then
 290         $BUSYBOX_PATH/tar -xJf data.tar.xz -C /
 291     elif [ -e 'data.tar.bz2' ]; then
 292         $BUSYBOX_PATH/tar -xjf data.tar.bz2 -C /
 293     elif [ -e 'data.tar.lzma' ]; then
 294         $BUSYBOX_PATH/tar -xaf data.tar.lzma -C /
 295     fi
 296
 297     if [ -e 'control.tar.gz' ]; then
 298         $BUSYBOX_PATH/tar -xzf control.tar.gz -C /
 299     elif [ -e 'control.tar.xz' ]; then
 300         $BUSYBOX_PATH/tar -xJf control.tar.xz -C /
 301     elif [ -e 'control.tar.bz2' ]; then
 302         $BUSYBOX_PATH/tar -xjf control.tar.bz2 -C /
 303     elif [ -e 'control.tar.lzma' ]; then
 304         $BUSYBOX_PATH/tar -xaf control.tar.lzma -C /
 305     fi
 306
 307     cd $CURDIR
 308     $BUSYBOX_PATH/rm -rf /tmp/vtoy_udeb
 309     $BUSYBOX_PATH/true
 310 }
 311
 312
 313 install_udeb_from_line() {
 314     vtlog "install_udeb_from_line $1"
 315
 316     if ! [ -b "$2" ]; then
 317         vterr "disk #$2# not exist"
 318         return
 319     fi
 320
 321     sector=$(echo $1 | $AWK '{print $(NF-1)}')
 322     length=$(echo $1 | $AWK '{print $NF}')
 323     vtlog "sector=$sector  length=$length"
 324
 325     $VTOY_PATH/tool/vtoydm -e -f $VTOY_PATH/ventoy_image_map -d ${2} -s $sector -l $length -o /tmp/xxx.udeb
 326     if [ -e /tmp/xxx.udeb ]; then
 327         vtlog "extract udeb file from iso success"
 328     else
 329         vterr "extract udeb file from iso fail"
 330         return
 331     fi
 332
 333     install_udeb_pkg /tmp/xxx.udeb
 334     $BUSYBOX_PATH/rm -f /tmp/xxx.udeb
 335 }
 336
 337 extract_file_from_line() {
 338     vtlog "extract_file_from_line $1 disk=#$2#"
 339     if ! [ -b "$2" ]; then
 340         vterr "disk #$2# not exist"
 341         return
 342     fi
 343
 344     sector=$(echo $1 | $AWK '{print $(NF-1)}')
 345     length=$(echo $1 | $AWK '{print $NF}')
 346     vtlog "sector=$sector  length=$length"
 347
 348     $VTOY_PATH/tool/vtoydm -e -f $VTOY_PATH/ventoy_image_map -d ${2} -s $sector -l $length -o $3
 349     if [ -e $3 ]; then
 350         vtlog "extract file from iso success"
 351         $BUSYBOX_PATH/true
 352     else
 353         vterr "extract file from iso fail"
 354         $BUSYBOX_PATH/false
 355     fi
 356 }
 357
 358 extract_rpm_from_line() {
 359     vtlog "extract_rpm_from_line $1 disk=#$2#"
 360
 361     if ! [ -b "$2" ]; then
 362         vterr "disk #$2# not exist"
 363         return
 364     fi
 365
 366     sector=$(echo $1 | $AWK '{print $(NF-1)}')
 367     length=$(echo $1 | $AWK '{print $NF}')
 368     vtlog "sector=$sector  length=$length"
 369
 370     $VTOY_PATH/tool/vtoydm -e -f $VTOY_PATH/ventoy_image_map -d ${2} -s $sector -l $length -o /tmp/xxx.rpm
 371     if [ -e /tmp/xxx.rpm ]; then
 372         vtlog "extract rpm file from iso success"
 373     else
 374         vterr "extract rpm file from iso fail"
 375         return
 376     fi
 377
 378     CURPWD=$($BUSYBOX_PATH/pwd)
 379
 380     $BUSYBOX_PATH/mkdir -p $VTOY_PATH/rpm
 381     cd $VTOY_PATH/rpm
 382     vtlog "extract rpm..."
 383     $BUSYBOX_PATH/rpm2cpio /tmp/xxx.rpm | $BUSYBOX_PATH/cpio -idm 2>>$VTLOG
 384     cd $CURPWD
 385
 386     $BUSYBOX_PATH/rm -f /tmp/xxx.rpm
 387 }
 388
 389 install_rpm_from_line() {
 390     vtlog "install_rpm_from_line $1 disk=#$2#"
 391
 392     if ! [ -b "$2" ]; then
 393         vterr "disk #$2# not exist"
 394         return
 395     fi
 396
 397     sector=$(echo $1 | $AWK '{print $(NF-1)}')
 398     length=$(echo $1 | $AWK '{print $NF}')
 399     vtlog "sector=$sector  length=$length"
 400
 401     $VTOY_PATH/tool/vtoydm -e -f $VTOY_PATH/ventoy_image_map -d ${2} -s $sector -l $length -o /tmp/xxx.rpm
 402     if [ -e /tmp/xxx.rpm ]; then
 403         vtlog "extract rpm file from iso success"
 404     else
 405         vterr "extract rpm file from iso fail"
 406         return
 407     fi
 408
 409     CURPWD=$($BUSYBOX_PATH/pwd)
 410
 411     cd /
 412     vtlog "install rpm..."
 413     $BUSYBOX_PATH/rpm2cpio /tmp/xxx.rpm | $BUSYBOX_PATH/cpio -idm 2>>$VTLOG
 414     cd $CURPWD
 415
 416     $BUSYBOX_PATH/rm -f /tmp/xxx.rpm
 417 }
 418
 419 dump_whole_iso_file() {
 420    $VTOY_PATH/tool/vtoydm -p -f $VTOY_PATH/ventoy_image_map -d $usb_disk | while read vtline; do
 421         vtlog "dmtable line: $vtline"
 422         vtcount=$(echo $vtline | $AWK '{print $2}')
 423         vtoffset=$(echo $vtline | $AWK '{print $NF}')
 424         $BUSYBOX_PATH/dd if=$usb_disk of="$1" bs=512 count=$vtcount skip=$vtoffset oflag=append conv=notrunc
 425     done
 426 }
 427
 428 ventoy_copy_device_mapper() {
 429     if [ -L $VTOY_DM_PATH ]; then
 430         vtlog "replace block device link $1..."
 431         $BUSYBOX_PATH/mv "$1" $VTOY_PATH/dev_backup_${1#/dev/}
 432         VT_MAPPER_LINK=$($BUSYBOX_PATH/readlink $VTOY_DM_PATH)
 433         $BUSYBOX_PATH/cp -a "/dev/mapper/$VT_MAPPER_LINK" "$1"
 434     elif [ -b $VTOY_DM_PATH ]; then
 435         vtlog "replace block device $1..."
 436         $BUSYBOX_PATH/mv "$1" $VTOY_PATH/dev_backup_${1#/dev/}
 437         $BUSYBOX_PATH/cp -a "$VTOY_DM_PATH" "$1"
 438     else
 439
 440         vtlog "$VTOY_DM_PATH not exist, now check /dev/dm-X ..."
 441         VT_DM_BIN=$(ventoy_find_bin_path dmsetup)
 442         if [ -z "$VT_DM_BIN" ]; then
 443             vtlog "no dmsetup avaliable, lastly try inbox dmsetup"
 444             VT_DM_BIN=$VTOY_PATH/tool/dmsetup
 445         fi
 446
 447         DM_VT_ID=$($VT_DM_BIN ls | $GREP ventoy | $SED 's/.*(\([0-9][0-9]*\),.*\([0-9][0-9]*\).*/\1 \2/')
 448         vtlog "DM_VT_ID=$DM_VT_ID ..."
 449         $BUSYBOX_PATH/mv "$1" $VTOY_PATH/dev_backup_${1#/dev/}
 450         $BUSYBOX_PATH/mknod -m 0666 "$1" b $DM_VT_ID
 451     fi
 452 }
 453
 454 # create link for device-mapper
 455 ventoy_create_persistent_link() {
 456     blkdev_num=$($VTOY_PATH/tool/dmsetup ls | grep vtoy_persistent | sed 's/.*(\([0-9][0-9]*\),.*\([0-9][0-9]*\).*/\1:\2/')
 457     vtDM=$(ventoy_find_dm_id ${blkdev_num})
 458
 459     if ! [ -d /dev/disk/by-label ]; then
 460         mkdir -p /dev/disk/by-label
 461     fi
 462
 463     VTLABEL=$($BUSYBOX_PATH/blkid /dev/$vtDM | $SED 's/.*LABEL="\([^"]*\)".*/\1/')
 464     if [ -z "$VTLABEL" ]; then
 465         VTLABEL=casper-rw
 466     fi
 467
 468     vtlog "Persistent Label: ##${VTLABEL}##"
 469
 470     if ! [ -e /dev/disk/by-label/$VTLABEL ]; then
 471         vtOldDir=$PWD
 472         cd /dev/disk/by-label
 473         ln -s ../../$vtDM $VTLABEL
 474         cd $vtOldDir
 475     fi
 476 }
 477
 478 ventoy_udev_disk_common_hook() {
 479     if echo $1 | $EGREP -q "nvme.*p[0-9]$|mmc.*p[0-9]$"; then
 480         VTDISK="${1:0:-2}"
 481     else
 482         VTDISK="${1:0:-1}"
 483     fi
 484
 485     if [ -e /vtoy/vtoy ]; then
 486         VTRWMOD=""
 487     else
 488         VTRWMOD="--readonly"
 489     fi
 490
 491     # create device mapper for iso image file
 492     if create_ventoy_device_mapper "/dev/$VTDISK" $VTRWMOD; then
 493         vtlog "==== create ventoy device mapper success ===="
 494     else
 495         vtlog "==== create ventoy device mapper failed ===="
 496
 497         $SLEEP 3
 498
 499         if $GREP -q "/dev/$VTDISK" /proc/mounts; then
 500             $GREP "/dev/$VTDISK" /proc/mounts | while read vtLine; do
 501                 vtPart=$(echo $vtLine | $AWK '{print $1}')
 502                 vtMnt=$(echo $vtLine | $AWK '{print $2}')
 503                 vtlog "$vtPart is mounted on $vtMnt  now umount it ..."
 504                 $BUSYBOX_PATH/umount $vtMnt
 505             done
 506         fi
 507
 508         if create_ventoy_device_mapper "/dev/$VTDISK" $VTRWMOD; then
 509             vtlog "==== create ventoy device mapper success after retry ===="
 510         else
 511             vtlog "==== create ventoy device mapper failed after retry ===="
 512             return
 513         fi
 514     fi
 515
 516     if [ "$2" = "noreplace" ]; then
 517         vtlog "no need to replace block device"
 518     else
 519         ventoy_copy_device_mapper "/dev/$1"
 520     fi
 521
 522     if [ -f $VTOY_PATH/ventoy_persistent_map ]; then
 523         create_persistent_device_mapper "/dev/$VTDISK"
 524         ventoy_create_persistent_link
 525     fi
 526 }
 527
 528 ventoy_create_dev_ventoy_part() {
 529     blkdev_num=$($VTOY_PATH/tool/dmsetup ls | $GREP ventoy | $SED 's/.*(\([0-9][0-9]*\),.*\([0-9][0-9]*\).*/\1 \2/')
 530     $BUSYBOX_PATH/mknod -m 0666 /dev/ventoy b $blkdev_num
 531
 532     if [ -e /vtoy_dm_table ]; then
 533         vtPartid=1
 534
 535         $CAT /vtoy_dm_table | while read vtline; do
 536             echo $vtline > /ventoy/dm_table_part${vtPartid}
 537             $VTOY_PATH/tool/dmsetup create ventoy${vtPartid} /ventoy/dm_table_part${vtPartid}
 538
 539             blkdev_num=$($VTOY_PATH/tool/dmsetup ls | $GREP ventoy${vtPartid} | $SED 's/.*(\([0-9][0-9]*\),.*\([0-9][0-9]*\).*/\1 \2/')
 540             $BUSYBOX_PATH/mknod -m 0666 /dev/ventoy${vtPartid} b $blkdev_num
 541
 542             vtPartid=$(expr $vtPartid + 1)
 543         done
 544     fi
 545 }
 546
 547 is_inotify_ventoy_part() {
 548     if echo $1 | $GREP -q "2$"; then
 549         if ! [ -e /sys/block/$1 ]; then
 550             if [ -e /sys/class/block/$1 ]; then
 551                 if echo $1 | $EGREP -q "nvme|mmc"; then
 552                     vtShortName=${1:0:-2}
 553                 else
 554                     vtShortName=${1:0:-1}
 555                 fi
 556
 557                 if [ -e /dev/$vtShortName ]; then
 558                     $VTOY_PATH/tool/vtoydump -f $VTOY_PATH/ventoy_os_param -c $vtShortName
 559                     return
 560                 fi
 561             fi
 562         fi
 563     fi
 564
 565     [ "1" = "0" ]
 566 }
 567
 568 ventoy_find_dm_id() {
 569     for vt in $($BUSYBOX_PATH/ls /sys/block/); do
 570         if [ "${vt:0:3}" = "dm-" ]; then
 571             vtMajorMinor=$($CAT /sys/block/$vt/dev)
 572             if [ "$vtMajorMinor" = "$1" ]; then
 573                 echo ${vt}
 574                 return
 575             fi
 576         fi
 577     done
 578     echo 'xx'
 579 }
 580
 581 ventoy_swap_device() {
 582     mv $1 $VTOY_PATH/swap_tmp_dev
 583     mv $2 $1
 584     mv $VTOY_PATH/swap_tmp_dev $2
 585 }
 586
 587 ventoy_extract_vtloopex() {
 588     vtCurPwd=$PWD
 589     $BUSYBOX_PATH/mkdir -p $VTOY_PATH/partmnt $VTOY_PATH/vtloopex
 590     $BUSYBOX_PATH/mount -o ro -t vfat $1  $VTOY_PATH/partmnt
 591     cd $VTOY_PATH/vtloopex
 592     $CAT $VTOY_PATH/partmnt/ventoy/vtloopex.cpio | $BUSYBOX_PATH/cpio -idm >> $VTLOG 2>&1
 593     $BUSYBOX_PATH/umount $VTOY_PATH/partmnt
 594     $BUSYBOX_PATH/rm -rf $VTOY_PATH/partmnt
 595
 596     if [ -n "$2" ]; then
 597         cd $VTOY_PATH/vtloopex/$2/
 598         $BUSYBOX_PATH/tar -xJf vtloopex.tar.xz
 599     fi
 600
 601     cd $vtCurPwd
 602 }