dracut-functions.sh

   1 #!/bin/bash
   2 #
   3 # functions used by dracut and other tools.
   4 #
   5 # Copyright 2005-2009 Red Hat, Inc.  All rights reserved.
   6 #
   7 # This program is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 2 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 #
  20 export LC_MESSAGES=C
  21
  22 if [[ $DRACUT_KERNEL_LAZY ]] && ! [[ $DRACUT_KERNEL_LAZY_HASHDIR ]]; then
  23     if ! [[ -d "$initdir/.kernelmodseen" ]]; then
  24         mkdir -p "$initdir/.kernelmodseen"
  25     fi
  26     DRACUT_KERNEL_LAZY_HASHDIR="$initdir/.kernelmodseen"
  27 fi
  28
  29 if [[ $initdir ]] && ! [[ -d $initdir ]]; then
  30     mkdir -p "$initdir"
  31 fi
  32
  33 # Generic substring function.  If $2 is in $1, return 0.
  34 strstr() { [[ $1 = *"$2"* ]]; }
  35 # Generic glob matching function. If glob pattern $2 matches anywhere in $1, OK
  36 strglobin() { [[ $1 = *$2* ]]; }
  37 # Generic glob matching function. If glob pattern $2 matches all of $1, OK
  38 strglob() { [[ $1 = $2 ]]; }
  39
  40 # helper function for check() in module-setup.sh
  41 # to check for required installed binaries
  42 # issues a standardized warning message
  43 require_binaries() {
  44     local _module_name="${moddir##*/}"
  45     local _ret=0
  46
  47     if [[ "$1" = "-m" ]]; then
  48         _module_name="$2"
  49         shift 2
  50     fi
  51
  52     for cmd in "$@"; do
  53         if ! find_binary "$cmd" &>/dev/null; then
  54             dinfo "dracut module '${_module_name#[0-9][0-9]}' will not be installed, because command '$cmd' could not be found!"
  55             ((_ret++))
  56         fi
  57     done
  58     return $_ret
  59 }
  60
  61 require_any_binary() {
  62     local _module_name="${moddir##*/}"
  63     local _ret=1
  64
  65     if [[ "$1" = "-m" ]]; then
  66         _module_name="$2"
  67         shift 2
  68     fi
  69
  70     for cmd in "$@"; do
  71         if find_binary "$cmd" &>/dev/null; then
  72             _ret=0
  73             break
  74         fi
  75     done
  76
  77     if (( $_ret != 0 )); then
  78         dinfo "$_module_name: Could not find any command of '$@'!"
  79         return 1
  80     fi
  81
  82     return 0
  83 }
  84
  85 # find a binary.  If we were not passed the full path directly,
  86 # search in the usual places to find the binary.
  87 find_binary() {
  88     if [[ -z ${1##/*} ]]; then
  89         if [[ -x $1 ]] || { [[ "$1" == *.so* ]] && ldd "$1" &>/dev/null; };  then
  90             printf "%s\n" "$1"
  91             return 0
  92         fi
  93     fi
  94
  95     type -P "${1##*/}"
  96 }
  97
  98 if ! [[ $dracutbasedir ]]; then
  99     dracutbasedir=${BASH_SOURCE[0]%/*}
 100     [[ $dracutbasedir = "dracut-functions" ]] && dracutbasedir="."
 101     [[ $dracutbasedir ]] || dracutbasedir="."
 102     dracutbasedir="$(readlink -f $dracutbasedir)"
 103 fi
 104
 105 ldconfig_paths()
 106 {
 107     ldconfig -pN 2>/dev/null | grep -E -v '/(lib|lib64|usr/lib|usr/lib64)/[^/]*$' | sed -n 's,.* => \(.*\)/.*,\1,p' | sort | uniq
 108 }
 109
 110 # Detect lib paths
 111 if ! [[ $libdirs ]] ; then
 112     if [[ "$(ldd /bin/sh)" == */lib64/* ]] &>/dev/null \
 113         && [[ -d /lib64 ]]; then
 114         libdirs+=" /lib64"
 115         [[ -d /usr/lib64 ]] && libdirs+=" /usr/lib64"
 116     else
 117         libdirs+=" /lib"
 118         [[ -d /usr/lib ]] && libdirs+=" /usr/lib"
 119     fi
 120
 121     libdirs+=" $(ldconfig_paths)"
 122
 123     export libdirs
 124 fi
 125
 126 if ! [[ $kernel ]]; then
 127     kernel=$(uname -r)
 128     export kernel
 129 fi
 130
 131 # Version comparision function.  Assumes Linux style version scheme.
 132 # $1 = version a
 133 # $2 = comparision op (gt, ge, eq, le, lt, ne)
 134 # $3 = version b
 135 vercmp() {
 136     local _n1=(${1//./ }) _op=$2 _n2=(${3//./ }) _i _res
 137
 138     for ((_i=0; ; _i++))
 139     do
 140         if [[ ! ${_n1[_i]}${_n2[_i]} ]]; then _res=0
 141         elif ((${_n1[_i]:-0} > ${_n2[_i]:-0})); then _res=1
 142         elif ((${_n1[_i]:-0} < ${_n2[_i]:-0})); then _res=2
 143         else continue
 144         fi
 145         break
 146     done
 147
 148     case $_op in
 149         gt) ((_res == 1));;
 150         ge) ((_res != 2));;
 151         eq) ((_res == 0));;
 152         le) ((_res != 1));;
 153         lt) ((_res == 2));;
 154         ne) ((_res != 0));;
 155     esac
 156 }
 157
 158 srcmods="/lib/modules/$kernel/"
 159
 160 [[ $drivers_dir ]] && {
 161     if ! command -v kmod &>/dev/null && vercmp "$(modprobe --version | cut -d' ' -f3)" lt 3.7; then
 162         dfatal 'To use --kmoddir option module-init-tools >= 3.7 is required.'
 163         exit 1
 164     fi
 165     srcmods="$drivers_dir"
 166 }
 167 export srcmods
 168
 169 # is_func <command>
 170 # Check whether $1 is a function.
 171 is_func() {
 172     [[ "$(type -t "$1")" = "function" ]]
 173 }
 174
 175 if ! is_func dinfo >/dev/null 2>&1; then
 176     . "$dracutbasedir/dracut-logger.sh"
 177     dlog_init
 178 fi
 179
 180 if ! [[ $initdir ]]; then
 181     dfatal "initdir not set"
 182     exit 1
 183 fi
 184
 185 # export standard hookdirs
 186 [[ $hookdirs ]] || {
 187     hookdirs="cmdline pre-udev pre-trigger netroot "
 188     hookdirs+="initqueue initqueue/settled initqueue/online initqueue/finished initqueue/timeout "
 189     hookdirs+="pre-mount pre-pivot cleanup mount "
 190     hookdirs+="emergency shutdown-emergency pre-shutdown shutdown "
 191     export hookdirs
 192 }
 193
 194 dracut_need_initqueue() {
 195     >"$initdir/lib/dracut/need-initqueue"
 196 }
 197
 198 dracut_module_included() {
 199     [[ " $mods_to_load $modules_loaded " == *\ $*\ * ]]
 200 }
 201
 202 # Create all subdirectories for given path without creating the last element.
 203 # $1 = path
 204 mksubdirs() {
 205     [[ -e ${1%/*} ]] || mkdir -m 0755 -p -- "${1%/*}"
 206 }
 207
 208 # Function prints global variables in format name=value line by line.
 209 # $@ = list of global variables' name
 210 print_vars() {
 211     local _var _value
 212
 213     for _var in "$@"
 214     do
 215         eval printf -v _value "%s" \""\$$_var"\"
 216         [[ ${_value} ]] && printf '%s="%s"\n' "$_var" "$_value"
 217     done
 218 }
 219
 220 # normalize_path <path>
 221 # Prints the normalized path, where it removes any duplicated
 222 # and trailing slashes.
 223 # Example:
 224 # $ normalize_path ///test/test//
 225 # /test/test
 226 normalize_path() {
 227     shopt -q -s extglob
 228     set -- "${1//+(\/)//}"
 229     shopt -q -u extglob
 230     printf "%s\n" "${1%/}"
 231 }
 232
 233 # convert_abs_rel <from> <to>
 234 # Prints the relative path, when creating a symlink to <to> from <from>.
 235 # Example:
 236 # $ convert_abs_rel /usr/bin/test /bin/test-2
 237 # ../../bin/test-2
 238 # $ ln -s $(convert_abs_rel /usr/bin/test /bin/test-2) /usr/bin/test
 239 convert_abs_rel() {
 240     local __current __absolute __abssize __cursize __newpath
 241     local -i __i __level
 242
 243     set -- "$(normalize_path "$1")" "$(normalize_path "$2")"
 244
 245     # corner case #1 - self looping link
 246     [[ "$1" == "$2" ]] && { printf "%s\n" "${1##*/}"; return; }
 247
 248     # corner case #2 - own dir link
 249     [[ "${1%/*}" == "$2" ]] && { printf ".\n"; return; }
 250
 251     IFS="/" __current=($1)
 252     IFS="/" __absolute=($2)
 253
 254     __abssize=${#__absolute[@]}
 255     __cursize=${#__current[@]}
 256
 257     while [[ "${__absolute[__level]}" == "${__current[__level]}" ]]
 258     do
 259         (( __level++ ))
 260         if (( __level > __abssize || __level > __cursize ))
 261         then
 262             break
 263         fi
 264     done
 265
 266     for ((__i = __level; __i < __cursize-1; __i++))
 267     do
 268         if ((__i > __level))
 269         then
 270             __newpath=$__newpath"/"
 271         fi
 272         __newpath=$__newpath".."
 273     done
 274
 275     for ((__i = __level; __i < __abssize; __i++))
 276     do
 277         if [[ -n $__newpath ]]
 278         then
 279             __newpath=$__newpath"/"
 280         fi
 281         __newpath=$__newpath${__absolute[__i]}
 282     done
 283
 284     printf "%s\n" "$__newpath"
 285 }
 286
 287 if [[ "$(ln --help)" == *--relative* ]]; then
 288     ln_r() {
 289         ln -sfnr "${initdir}/$1" "${initdir}/$2"
 290     }
 291 else
 292     ln_r() {
 293         local _source=$1
 294         local _dest=$2
 295         [[ -d "${_dest%/*}" ]] && _dest=$(readlink -f "${_dest%/*}")/${_dest##*/}
 296         ln -sfn -- "$(convert_abs_rel "${_dest}" "${_source}")" "${initdir}/${_dest}"
 297     }
 298 fi
 299
 300 # get_fs_env <device>
 301 # Get and the ID_FS_TYPE variable from udev for a device.
 302 # Example:
 303 # $ get_fs_env /dev/sda2
 304 # ext4
 305 get_fs_env() {
 306     local evalstr
 307     local found
 308
 309     [[ $1 ]] || return
 310     unset ID_FS_TYPE
 311     ID_FS_TYPE=$(blkid -u filesystem -o export -- "$1" \
 312         | while read line; do
 313             if [[ "$line" == TYPE\=* ]]; then
 314                 printf "%s" "${line#TYPE=}";
 315                 exit 0;
 316             fi
 317             done)
 318     if [[ $ID_FS_TYPE ]]; then
 319         printf "%s" "$ID_FS_TYPE"
 320         return 0
 321     fi
 322     return 1
 323 }
 324
 325 # get_maj_min <device>
 326 # Prints the major and minor of a device node.
 327 # Example:
 328 # $ get_maj_min /dev/sda2
 329 # 8:2
 330 get_maj_min() {
 331     local _maj _min _majmin
 332     _majmin="$(stat -L -c '%t:%T' "$1" 2>/dev/null)"
 333     printf "%s" "$((0x${_majmin%:*})):$((0x${_majmin#*:}))"
 334 }
 335
 336
 337 # get_devpath_block <device>
 338 # get the DEVPATH in /sys of a block device
 339 get_devpath_block() {
 340     local _majmin _i
 341     _majmin=$(get_maj_min "$1")
 342
 343     for _i in /sys/block/*/dev /sys/block/*/*/dev; do
 344         [[ -e "$_i" ]] || continue
 345         if [[ "$_majmin" == "$(<"$_i")" ]]; then
 346             printf "%s" "${_i%/dev}"
 347             return 0
 348         fi
 349     done
 350     return 1
 351 }
 352
 353 # get a persistent path from a device
 354 get_persistent_dev() {
 355     local i _tmp _dev
 356
 357     _dev=$(get_maj_min "$1")
 358     [ -z "$_dev" ] && return
 359
 360     for i in \
 361         /dev/mapper/* \
 362         /dev/disk/${persistent_policy:-by-uuid}/* \
 363         /dev/disk/by-uuid/* \
 364         /dev/disk/by-label/* \
 365         /dev/disk/by-partuuid/* \
 366         /dev/disk/by-partlabel/* \
 367         /dev/disk/by-id/* \
 368         /dev/disk/by-path/* \
 369         ; do
 370         [[ -e "$i" ]] || continue
 371         [[ $i == /dev/mapper/control ]] && continue
 372         [[ $i == /dev/mapper/mpath* ]] && continue
 373         _tmp=$(get_maj_min "$i")
 374         if [ "$_tmp" = "$_dev" ]; then
 375             printf -- "%s" "$i"
 376             return
 377         fi
 378     done
 379     printf -- "%s" "$1"
 380 }
 381
 382 expand_persistent_dev() {
 383     local _dev=$1
 384
 385     case "$_dev" in
 386         LABEL=*)
 387             _dev="/dev/disk/by-label/${_dev#LABEL=}"
 388             ;;
 389         UUID=*)
 390             _dev="${_dev#UUID=}"
 391             _dev="${_dev,,}"
 392             _dev="/dev/disk/by-uuid/${_dev}"
 393             ;;
 394         PARTUUID=*)
 395             _dev="${_dev#PARTUUID=}"
 396             _dev="${_dev,,}"
 397             _dev="/dev/disk/by-partuuid/${_dev}"
 398             ;;
 399         PARTLABEL=*)
 400             _dev="/dev/disk/by-partlabel/${_dev#PARTLABEL=}"
 401             ;;
 402     esac
 403     printf "%s" "$_dev"
 404 }
 405
 406 shorten_persistent_dev() {
 407     local _dev="$1"
 408     case "$_dev" in
 409         /dev/disk/by-uuid/*)
 410             printf "%s" "UUID=${_dev##*/}";;
 411         /dev/disk/by-label/*)
 412             printf "%s" "LABEL=${_dev##*/}";;
 413         /dev/disk/by-partuuid/*)
 414             printf "%s" "PARTUUID=${_dev##*/}";;
 415         /dev/disk/by-partlabel/*)
 416             printf "%s" "PARTLABEL=${_dev##*/}";;
 417         *)
 418             printf "%s" "$_dev";;
 419     esac
 420 }
 421
 422 # find_block_device <mountpoint>
 423 # Prints the major and minor number of the block device
 424 # for a given mountpoint.
 425 # Unless $use_fstab is set to "yes" the functions
 426 # uses /proc/self/mountinfo as the primary source of the
 427 # information and only falls back to /etc/fstab, if the mountpoint
 428 # is not found there.
 429 # Example:
 430 # $ find_block_device /usr
 431 # 8:4
 432 find_block_device() {
 433     local _majmin _dev _majmin _find_mpt
 434     _find_mpt="$1"
 435     if [[ $use_fstab != yes ]]; then
 436         [[ -d $_find_mpt/. ]]
 437         findmnt -e -v -n -o 'MAJ:MIN,SOURCE' --target "$_find_mpt" | { \
 438             while read _majmin _dev; do
 439                 if [[ -b $_dev ]]; then
 440                     if ! [[ $_majmin ]] || [[ $_majmin == 0:* ]]; then
 441                         _majmin=$(get_maj_min $_dev)
 442                     fi
 443                     if [[ $_majmin ]]; then
 444                         printf "%s\n" "$_majmin"
 445                     else
 446                         printf "%s\n" "$_dev"
 447                     fi
 448                     return 0
 449                 fi
 450                 if [[ $_dev = *:* ]]; then
 451                     printf "%s\n" "$_dev"
 452                     return 0
 453                 fi
 454             done; return 1; } && return 0
 455     fi
 456     # fall back to /etc/fstab
 457
 458     findmnt -e --fstab -v -n -o 'MAJ:MIN,SOURCE' --target "$_find_mpt" | { \
 459         while read _majmin _dev; do
 460             if ! [[ $_dev ]]; then
 461                 _dev="$_majmin"
 462                 unset _majmin
 463             fi
 464             if [[ -b $_dev ]]; then
 465                 [[ $_majmin ]] || _majmin=$(get_maj_min $_dev)
 466                 if [[ $_majmin ]]; then
 467                     printf "%s\n" "$_majmin"
 468                 else
 469                     printf "%s\n" "$_dev"
 470                 fi
 471                 return 0
 472             fi
 473             if [[ $_dev = *:* ]]; then
 474                 printf "%s\n" "$_dev"
 475                 return 0
 476             fi
 477         done; return 1; } && return 0
 478
 479     return 1
 480 }
 481
 482 # find_mp_fstype <mountpoint>
 483 # Echo the filesystem type for a given mountpoint.
 484 # /proc/self/mountinfo is taken as the primary source of information
 485 # and /etc/fstab is used as a fallback.
 486 # No newline is appended!
 487 # Example:
 488 # $ find_mp_fstype /;echo
 489 # ext4
 490 find_mp_fstype() {
 491     local _fs
 492
 493     if [[ $use_fstab != yes ]]; then
 494         findmnt -e -v -n -o 'FSTYPE' --target "$1" | { \
 495             while read _fs; do
 496                 [[ $_fs ]] || continue
 497                 [[ $_fs = "autofs" ]] && continue
 498                 printf "%s" "$_fs"
 499                 return 0
 500             done; return 1; } && return 0
 501     fi
 502
 503     findmnt --fstab -e -v -n -o 'FSTYPE' --target "$1" | { \
 504         while read _fs; do
 505             [[ $_fs ]] || continue
 506             [[ $_fs = "autofs" ]] && continue
 507             printf "%s" "$_fs"
 508             return 0
 509         done; return 1; } && return 0
 510
 511     return 1
 512 }
 513
 514 # find_dev_fstype <device>
 515 # Echo the filesystem type for a given device.
 516 # /proc/self/mountinfo is taken as the primary source of information
 517 # and /etc/fstab is used as a fallback.
 518 # No newline is appended!
 519 # Example:
 520 # $ find_dev_fstype /dev/sda2;echo
 521 # ext4
 522 find_dev_fstype() {
 523     local _find_dev _fs
 524     _find_dev="$1"
 525     if ! [[ "$_find_dev" = /dev* ]]; then
 526         [[ -b "/dev/block/$_find_dev" ]] && _find_dev="/dev/block/$_find_dev"
 527     fi
 528
 529     if [[ $use_fstab != yes ]]; then
 530         findmnt -e -v -n -o 'FSTYPE' --source "$_find_dev" | { \
 531             while read _fs; do
 532                 [[ $_fs ]] || continue
 533                 [[ $_fs = "autofs" ]] && continue
 534                 printf "%s" "$_fs"
 535                 return 0
 536             done; return 1; } && return 0
 537     fi
 538
 539     findmnt --fstab -e -v -n -o 'FSTYPE' --source "$_find_dev" | { \
 540         while read _fs; do
 541             [[ $_fs ]] || continue
 542             [[ $_fs = "autofs" ]] && continue
 543             printf "%s" "$_fs"
 544             return 0
 545         done; return 1; } && return 0
 546
 547     return 1
 548 }
 549
 550 # find_mp_fsopts <mountpoint>
 551 # Echo the filesystem options for a given mountpoint.
 552 # /proc/self/mountinfo is taken as the primary source of information
 553 # and /etc/fstab is used as a fallback.
 554 # No newline is appended!
 555 # Example:
 556 # $ find_mp_fsopts /;echo
 557 # rw,relatime,discard,data=ordered
 558 find_mp_fsopts() {
 559     if [[ $use_fstab != yes ]]; then
 560         findmnt -e -v -n -o 'OPTIONS' --target "$1" 2>/dev/null && return 0
 561     fi
 562
 563     findmnt --fstab -e -v -n -o 'OPTIONS' --target "$1"
 564 }
 565
 566 # find_dev_fsopts <device>
 567 # Echo the filesystem options for a given device.
 568 # /proc/self/mountinfo is taken as the primary source of information
 569 # and /etc/fstab is used as a fallback.
 570 # Example:
 571 # $ find_dev_fsopts /dev/sda2
 572 # rw,relatime,discard,data=ordered
 573 find_dev_fsopts() {
 574     local _find_dev _opts
 575     _find_dev="$1"
 576     if ! [[ "$_find_dev" = /dev* ]]; then
 577         [[ -b "/dev/block/$_find_dev" ]] && _find_dev="/dev/block/$_find_dev"
 578     fi
 579
 580     if [[ $use_fstab != yes ]]; then
 581         findmnt -e -v -n -o 'OPTIONS' --source "$_find_dev" 2>/dev/null && return 0
 582     fi
 583
 584     findmnt --fstab -e -v -n -o 'OPTIONS' --source "$_find_dev"
 585 }
 586
 587
 588 # finds the major:minor of the block device backing the root filesystem.
 589 find_root_block_device() { find_block_device /; }
 590
 591 # for_each_host_dev_fs <func>
 592 # Execute "<func> <dev> <filesystem>" for every "<dev> <fs>" pair found
 593 # in ${host_fs_types[@]}
 594 for_each_host_dev_fs()
 595 {
 596     local _func="$1"
 597     local _dev
 598     local _ret=1
 599
 600     [[ "${!host_fs_types[@]}" ]] || return 0
 601
 602     for _dev in "${!host_fs_types[@]}"; do
 603         $_func "$_dev" "${host_fs_types[$_dev]}" && _ret=0
 604     done
 605     return $_ret
 606 }
 607
 608 host_fs_all()
 609 {
 610     printf "%s\n" "${host_fs_types[@]}"
 611 }
 612
 613 # Walk all the slave relationships for a given block device.
 614 # Stop when our helper function returns success
 615 # $1 = function to call on every found block device
 616 # $2 = block device in major:minor format
 617 check_block_and_slaves() {
 618     local _x
 619     [[ -b /dev/block/$2 ]] || return 1 # Not a block device? So sorry.
 620     if ! lvm_internal_dev $2; then "$1" $2 && return; fi
 621     check_vol_slaves "$@" && return 0
 622     if [[ -f /sys/dev/block/$2/../dev ]]; then
 623         check_block_and_slaves $1 $(<"/sys/dev/block/$2/../dev") && return 0
 624     fi
 625     [[ -d /sys/dev/block/$2/slaves ]] || return 1
 626     for _x in /sys/dev/block/$2/slaves/*/dev; do
 627         [[ -f $_x ]] || continue
 628         check_block_and_slaves $1 $(<"$_x") && return 0
 629     done
 630     return 1
 631 }
 632
 633 check_block_and_slaves_all() {
 634     local _x _ret=1
 635     [[ -b /dev/block/$2 ]] || return 1 # Not a block device? So sorry.
 636     if ! lvm_internal_dev $2 && "$1" $2; then
 637         _ret=0
 638     fi
 639     check_vol_slaves "$@" && return 0
 640     if [[ -f /sys/dev/block/$2/../dev ]]; then
 641         check_block_and_slaves_all $1 $(<"/sys/dev/block/$2/../dev") && _ret=0
 642     fi
 643     [[ -d /sys/dev/block/$2/slaves ]] || return 1
 644     for _x in /sys/dev/block/$2/slaves/*/dev; do
 645         [[ -f $_x ]] || continue
 646         check_block_and_slaves_all $1 $(<"$_x") && _ret=0
 647     done
 648     return $_ret
 649 }
 650 # for_each_host_dev_and_slaves <func>
 651 # Execute "<func> <dev>" for every "<dev>" found
 652 # in ${host_devs[@]} and their slaves
 653 for_each_host_dev_and_slaves_all()
 654 {
 655     local _func="$1"
 656     local _dev
 657     local _ret=1
 658
 659     [[ "${host_devs[@]}" ]] || return 0
 660
 661     for _dev in ${host_devs[@]}; do
 662         [[ -b "$_dev" ]] || continue
 663         if check_block_and_slaves_all $_func $(get_maj_min $_dev); then
 664             _ret=0
 665         fi
 666     done
 667     return $_ret
 668 }
 669
 670 for_each_host_dev_and_slaves()
 671 {
 672     local _func="$1"
 673     local _dev
 674
 675     [[ "${host_devs[@]}" ]] || return 0
 676
 677     for _dev in ${host_devs[@]}; do
 678         [[ -b "$_dev" ]] || continue
 679         check_block_and_slaves $_func $(get_maj_min $_dev) && return 0
 680     done
 681     return 1
 682 }
 683
 684 # ugly workaround for the lvm design
 685 # There is no volume group device,
 686 # so, there are no slave devices for volume groups.
 687 # Logical volumes only have the slave devices they really live on,
 688 # but you cannot create the logical volume without the volume group.
 689 # And the volume group might be bigger than the devices the LV needs.
 690 check_vol_slaves() {
 691     local _lv _vg _pv _dm
 692     for i in /dev/mapper/*; do
 693         [[ $i == /dev/mapper/control ]] && continue
 694         _lv=$(get_maj_min $i)
 695         _dm=/sys/dev/block/$_lv/dm
 696         [[ -f $_dm/uuid  && $(<$_dm/uuid) =~ LVM-* ]] || continue
 697         if [[ $_lv = $2 ]]; then
 698             _vg=$(lvm lvs --noheadings -o vg_name $i 2>/dev/null)
 699             # strip space
 700             _vg=$(printf "%s\n" "$_vg")
 701             if [[ $_vg ]]; then
 702                 for _pv in $(lvm vgs --noheadings -o pv_name "$_vg" 2>/dev/null)
 703                 do
 704                     check_block_and_slaves $1 $(get_maj_min $_pv) && return 0
 705                 done
 706             fi
 707         fi
 708     done
 709     return 1
 710 }
 711
 712 # fs_get_option <filesystem options> <search for option>
 713 # search for a specific option in a bunch of filesystem options
 714 # and return the value
 715 fs_get_option() {
 716     local _fsopts=$1
 717     local _option=$2
 718     local OLDIFS="$IFS"
 719     IFS=,
 720     set -- $_fsopts
 721     IFS="$OLDIFS"
 722     while [ $# -gt 0 ]; do
 723         case $1 in
 724             $_option=*)
 725                 echo ${1#${_option}=}
 726                 break
 727         esac
 728         shift
 729     done
 730 }
 731
 732 if ! [[ $DRACUT_INSTALL ]]; then
 733     DRACUT_INSTALL=$(find_binary dracut-install)
 734 fi
 735
 736 if ! [[ $DRACUT_INSTALL ]] && [[ -x $dracutbasedir/dracut-install ]]; then
 737     DRACUT_INSTALL=$dracutbasedir/dracut-install
 738 elif ! [[ $DRACUT_INSTALL ]] && [[ -x $dracutbasedir/install/dracut-install ]]; then
 739     DRACUT_INSTALL=$dracutbasedir/install/dracut-install
 740 fi
 741
 742 if ! [[ -x $DRACUT_INSTALL ]]; then
 743     dfatal "dracut-install not found!"
 744     exit 10
 745 fi
 746
 747 [[ $DRACUT_RESOLVE_LAZY ]] || export DRACUT_RESOLVE_DEPS=1
 748 inst_dir() {
 749     [[ -e ${initdir}/"$1" ]] && return 0  # already there
 750     $DRACUT_INSTALL ${initdir:+-D "$initdir"} -d "$@"
 751     (($? != 0)) && derror $DRACUT_INSTALL ${initdir:+-D "$initdir"} -d "$@" || :
 752 }
 753
 754 inst() {
 755     local _hostonly_install
 756     if [[ "$1" == "-H" ]]; then
 757         _hostonly_install="-H"
 758         shift
 759     fi
 760     [[ -e ${initdir}/"${2:-$1}" ]] && return 0  # already there
 761     $DRACUT_INSTALL ${initdir:+-D "$initdir"} ${loginstall:+-L "$loginstall"} ${DRACUT_RESOLVE_DEPS:+-l} ${DRACUT_FIPS_MODE:+-f} ${_hostonly_install:+-H} "$@"
 762     (($? != 0)) && derror $DRACUT_INSTALL ${initdir:+-D "$initdir"} ${loginstall:+-L "$loginstall"} ${DRACUT_RESOLVE_DEPS:+-l} ${DRACUT_FIPS_MODE:+-f} ${_hostonly_install:+-H} "$@" || :
 763 }
 764
 765 inst_simple() {
 766     local _hostonly_install
 767     if [[ "$1" == "-H" ]]; then
 768         _hostonly_install="-H"
 769         shift
 770     fi
 771     [[ -e ${initdir}/"${2:-$1}" ]] && return 0  # already there
 772     [[ -e $1 ]] || return 1  # no source
 773     $DRACUT_INSTALL ${initdir:+-D "$initdir"} ${loginstall:+-L "$loginstall"} ${_hostonly_install:+-H} "$@"
 774     (($? != 0)) && derror $DRACUT_INSTALL ${initdir:+-D "$initdir"} ${loginstall:+-L "$loginstall"} ${_hostonly_install:+-H} "$@" || :
 775 }
 776
 777 inst_symlink() {
 778     local _hostonly_install
 779     if [[ "$1" == "-H" ]]; then
 780         _hostonly_install="-H"
 781         shift
 782     fi
 783     [[ -e ${initdir}/"${2:-$1}" ]] && return 0  # already there
 784     [[ -L $1 ]] || return 1
 785     $DRACUT_INSTALL ${initdir:+-D "$initdir"} ${loginstall:+-L "$loginstall"} ${DRACUT_RESOLVE_DEPS:+-l}  ${DRACUT_FIPS_MODE:+-f} ${_hostonly_install:+-H} "$@"
 786     (($? != 0)) && derror $DRACUT_INSTALL ${initdir:+-D "$initdir"} ${loginstall:+-L "$loginstall"} ${DRACUT_RESOLVE_DEPS:+-l}  ${DRACUT_FIPS_MODE:+-f} ${_hostonly_install:+-H} "$@" || :
 787 }
 788
 789 inst_multiple() {
 790     local _ret
 791     $DRACUT_INSTALL ${initdir:+-D "$initdir"} -a ${loginstall:+-L "$loginstall"} ${DRACUT_RESOLVE_DEPS:+-l}  ${DRACUT_FIPS_MODE:+-f} "$@"
 792     _ret=$?
 793     (($_ret != 0)) && derror $DRACUT_INSTALL ${initdir:+-D "$initdir"} -a ${loginstall:+-L "$loginstall"} ${DRACUT_RESOLVE_DEPS:+-l}  ${DRACUT_FIPS_MODE:+-f} ${_hostonly_install:+-H} "$@" || :
 794     return $_ret
 795 }
 796
 797 dracut_install() {
 798     inst_multiple "$@"
 799 }
 800
 801 inst_library() {
 802     local _hostonly_install
 803     if [[ "$1" == "-H" ]]; then
 804         _hostonly_install="-H"
 805         shift
 806     fi
 807     [[ -e ${initdir}/"${2:-$1}" ]] && return 0  # already there
 808     [[ -e $1 ]] || return 1  # no source
 809     $DRACUT_INSTALL ${initdir:+-D "$initdir"} ${loginstall:+-L "$loginstall"} ${DRACUT_RESOLVE_DEPS:+-l}  ${DRACUT_FIPS_MODE:+-f} ${_hostonly_install:+-H} "$@"
 810     (($? != 0)) && derror $DRACUT_INSTALL ${initdir:+-D "$initdir"} ${loginstall:+-L "$loginstall"} ${DRACUT_RESOLVE_DEPS:+-l}  ${DRACUT_FIPS_MODE:+-f} ${_hostonly_install:+-H} "$@" || :
 811 }
 812
 813 inst_binary() {
 814     $DRACUT_INSTALL ${initdir:+-D "$initdir"} ${loginstall:+-L "$loginstall"} ${DRACUT_RESOLVE_DEPS:+-l}  ${DRACUT_FIPS_MODE:+-f} "$@"
 815     (($? != 0)) && derror $DRACUT_INSTALL ${initdir:+-D "$initdir"} ${loginstall:+-L "$loginstall"} ${DRACUT_RESOLVE_DEPS:+-l}  ${DRACUT_FIPS_MODE:+-f} "$@" || :
 816 }
 817
 818 inst_script() {
 819     $DRACUT_INSTALL ${initdir:+-D "$initdir"} ${loginstall:+-L "$loginstall"} ${DRACUT_RESOLVE_DEPS:+-l} ${DRACUT_FIPS_MODE:+-f} "$@"
 820     (($? != 0)) && derror $DRACUT_INSTALL ${initdir:+-D "$initdir"} ${loginstall:+-L "$loginstall"} ${DRACUT_RESOLVE_DEPS:+-l}  ${DRACUT_FIPS_MODE:+-f} "$@" || :
 821 }
 822
 823 mark_hostonly() {
 824     for i in "$@"; do
 825         echo "$i" >> "$initdir/lib/dracut/hostonly-files"
 826     done
 827 }
 828
 829 # find symlinks linked to given library file
 830 # $1 = library file
 831 # Function searches for symlinks by stripping version numbers appended to
 832 # library filename, checks if it points to the same target and finally
 833 # prints the list of symlinks to stdout.
 834 #
 835 # Example:
 836 # rev_lib_symlinks libfoo.so.8.1
 837 # output: libfoo.so.8 libfoo.so
 838 # (Only if libfoo.so.8 and libfoo.so exists on host system.)
 839 rev_lib_symlinks() {
 840     [[ ! $1 ]] && return 0
 841
 842     local fn="$1" orig="$(readlink -f "$1")" links=''
 843
 844     [[ ${fn} == *.so.* ]] || return 1
 845
 846     until [[ ${fn##*.} == so ]]; do
 847         fn="${fn%.*}"
 848         [[ -L ${fn} && $(readlink -f "${fn}") == ${orig} ]] && links+=" ${fn}"
 849     done
 850
 851     echo "${links}"
 852 }
 853
 854 # attempt to install any programs specified in a udev rule
 855 inst_rule_programs() {
 856     local _prog _bin
 857
 858     if grep -qE 'PROGRAM==?"[^ "]+' "$1"; then
 859         for _prog in $(grep -E 'PROGRAM==?"[^ "]+' "$1" | sed -r 's/.*PROGRAM==?"([^ "]+).*/\1/'); do
 860             _bin=""
 861             if [ -x ${udevdir}/$_prog ]; then
 862                 _bin=${udevdir}/$_prog
 863             elif [[ "${_prog/\$env\{/}" == "$_prog" ]]; then
 864                 _bin=$(find_binary "$_prog") || {
 865                     dinfo "Skipping program $_prog using in udev rule ${1##*/} as it cannot be found"
 866                     continue;
 867                 }
 868             fi
 869
 870             [[ $_bin ]] && inst_binary "$_bin"
 871         done
 872     fi
 873     if grep -qE 'RUN[+=]=?"[^ "]+' "$1"; then
 874         for _prog in $(grep -E 'RUN[+=]=?"[^ "]+' "$1" | sed -r 's/.*RUN[+=]=?"([^ "]+).*/\1/'); do
 875             _bin=""
 876             if [ -x ${udevdir}/$_prog ]; then
 877                 _bin=${udevdir}/$_prog
 878             elif [[ "${_prog/\$env\{/}" == "$_prog" ]] && [[ "${_prog}" != "/sbin/initqueue" ]]; then
 879                 _bin=$(find_binary "$_prog") || {
 880                     dinfo "Skipping program $_prog using in udev rule ${1##*/} as it cannot be found"
 881                     continue;
 882                 }
 883             fi
 884
 885             [[ $_bin ]] && inst_binary "$_bin"
 886         done
 887     fi
 888     if grep -qE 'IMPORT\{program\}==?"[^ "]+' "$1"; then
 889         for _prog in $(grep -E 'IMPORT\{program\}==?"[^ "]+' "$1" | sed -r 's/.*IMPORT\{program\}==?"([^ "]+).*/\1/'); do
 890             _bin=""
 891             if [ -x ${udevdir}/$_prog ]; then
 892                 _bin=${udevdir}/$_prog
 893             elif [[ "${_prog/\$env\{/}" == "$_prog" ]]; then
 894                 _bin=$(find_binary "$_prog") || {
 895                     dinfo "Skipping program $_prog using in udev rule ${1##*/} as it cannot be found"
 896                     continue;
 897                 }
 898             fi
 899
 900             [[ $_bin ]] && dracut_install "$_bin"
 901         done
 902     fi
 903 }
 904
 905 # attempt to install any programs specified in a udev rule
 906 inst_rule_group_owner() {
 907     local i
 908
 909     if grep -qE 'OWNER=?"[^ "]+' "$1"; then
 910         for i in $(grep -E 'OWNER=?"[^ "]+' "$1" | sed -r 's/.*OWNER=?"([^ "]+).*/\1/'); do
 911             if ! egrep -q "^$i:" "$initdir/etc/passwd" 2>/dev/null; then
 912                 egrep "^$i:" /etc/passwd 2>/dev/null >> "$initdir/etc/passwd"
 913             fi
 914         done
 915     fi
 916     if grep -qE 'GROUP=?"[^ "]+' "$1"; then
 917         for i in $(grep -E 'GROUP=?"[^ "]+' "$1" | sed -r 's/.*GROUP=?"([^ "]+).*/\1/'); do
 918             if ! egrep -q "^$i:" "$initdir/etc/group" 2>/dev/null; then
 919                 egrep "^$i:" /etc/group 2>/dev/null >> "$initdir/etc/group"
 920             fi
 921         done
 922     fi
 923 }
 924
 925 inst_rule_initqueue() {
 926     if grep -q -F initqueue "$1"; then
 927         dracut_need_initqueue
 928     fi
 929 }
 930
 931 # udev rules always get installed in the same place, so
 932 # create a function to install them to make life simpler.
 933 inst_rules() {
 934     local _target=/etc/udev/rules.d _rule _found
 935
 936     inst_dir "${udevdir}/rules.d"
 937     inst_dir "$_target"
 938     for _rule in "$@"; do
 939         if [ "${_rule#/}" = "$_rule" ]; then
 940             for r in ${udevdir}/rules.d ${hostonly:+/etc/udev/rules.d}; do
 941                 if [[ -e $r/$_rule ]]; then
 942                     _found="$r/$_rule"
 943                     inst_rule_programs "$_found"
 944                     inst_rule_group_owner "$_found"
 945                     inst_rule_initqueue "$_found"
 946                     inst_simple "$_found"
 947                 fi
 948             done
 949         fi
 950         for r in '' $dracutbasedir/rules.d/; do
 951             # skip rules without an absolute path
 952             [[ "${r}$_rule" != /* ]] && continue
 953
 954             if [[ -f ${r}$_rule ]]; then
 955                 _found="${r}$_rule"
 956                 inst_rule_programs "$_found"
 957                 inst_rule_group_owner "$_found"
 958                 inst_rule_initqueue "$_found"
 959                 inst_simple "$_found" "$_target/${_found##*/}"
 960             fi
 961         done
 962         [[ $_found ]] || dinfo "Skipping udev rule: $_rule"
 963     done
 964 }
 965
 966 inst_rules_wildcard() {
 967     local _target=/etc/udev/rules.d _rule _found
 968
 969     inst_dir "${udevdir}/rules.d"
 970     inst_dir "$_target"
 971     for _rule in ${udevdir}/rules.d/$1 ${dracutbasedir}/rules.d/$1 ; do
 972         if [[ -e $_rule ]]; then
 973             inst_rule_programs "$_rule"
 974             inst_rule_group_owner "$_rule"
 975             inst_rule_initqueue "$_rule"
 976             inst_simple "$_rule"
 977             _found=$_rule
 978         fi
 979     done
 980     if [ -n ${hostonly} ] ; then
 981         for _rule in ${_target}/$1 ; do
 982             if [[ -f $_rule ]]; then
 983                 inst_rule_programs "$_rule"
 984                 inst_rule_group_owner "$_rule"
 985                 inst_rule_initqueue "$_rule"
 986                 inst_simple "$_rule"
 987                 _found=$_rule
 988             fi
 989         done
 990     fi
 991     [[ $_found ]] || dinfo "Skipping udev rule: $_rule"
 992 }
 993
 994 prepare_udev_rules() {
 995     [ -z "$UDEVVERSION" ] && export UDEVVERSION=$(udevadm --version)
 996
 997     for f in "$@"; do
 998         f="${initdir}/etc/udev/rules.d/$f"
 999         [ -e "$f" ] || continue
1000         while read line; do
1001             if [ "${line%%IMPORT PATH_ID}" != "$line" ]; then
1002                 if [ $UDEVVERSION -ge 174 ]; then
1003                     printf '%sIMPORT{builtin}="path_id"\n' "${line%%IMPORT PATH_ID}"
1004                 else
1005                     printf '%sIMPORT{program}="path_id %%p"\n' "${line%%IMPORT PATH_ID}"
1006                 fi
1007             elif [ "${line%%IMPORT BLKID}" != "$line" ]; then
1008                 if [ $UDEVVERSION -ge 176 ]; then
1009                     printf '%sIMPORT{builtin}="blkid"\n' "${line%%IMPORT BLKID}"
1010                 else
1011                     printf '%sIMPORT{program}="/sbin/blkid -o udev -p $tempnode"\n' "${line%%IMPORT BLKID}"
1012                 fi
1013             else
1014                 echo "$line"
1015             fi
1016         done < "${f}" > "${f}.new"
1017         mv "${f}.new" "$f"
1018     done
1019 }
1020
1021 # install function specialized for hooks
1022 # $1 = type of hook, $2 = hook priority (lower runs first), $3 = hook
1023 # All hooks should be POSIX/SuS compliant, they will be sourced by init.
1024 inst_hook() {
1025     if ! [[ -f $3 ]]; then
1026         dfatal "Cannot install a hook ($3) that does not exist."
1027         dfatal "Aborting initrd creation."
1028         exit 1
1029     elif ! [[ "$hookdirs" == *$1* ]]; then
1030         dfatal "No such hook type $1. Aborting initrd creation."
1031         exit 1
1032     fi
1033     inst_simple "$3" "/lib/dracut/hooks/${1}/${2}-${3##*/}"
1034 }
1035
1036 # install any of listed files
1037 #
1038 # If first argument is '-d' and second some destination path, first accessible
1039 # source is installed into this path, otherwise it will installed in the same
1040 # path as source.  If none of listed files was installed, function return 1.
1041 # On first successful installation it returns with 0 status.
1042 #
1043 # Example:
1044 #
1045 # inst_any -d /bin/foo /bin/bar /bin/baz
1046 #
1047 # Lets assume that /bin/baz exists, so it will be installed as /bin/foo in
1048 # initramfs.
1049 inst_any() {
1050     local to f
1051
1052     [[ $1 = '-d' ]] && to="$2" && shift 2
1053
1054     for f in "$@"; do
1055         if [[ -e $f ]]; then
1056             [[ $to ]] && inst "$f" "$to" && return 0
1057             inst "$f" && return 0
1058         fi
1059     done
1060
1061     return 1
1062 }
1063
1064
1065 # inst_libdir_file [-n <pattern>] <file> [<file>...]
1066 # Install a <file> located on a lib directory to the initramfs image
1067 # -n <pattern> install matching files
1068 inst_libdir_file() {
1069     local _files
1070     if [[ "$1" == "-n" ]]; then
1071         local _pattern=$2
1072         shift 2
1073         for _dir in $libdirs; do
1074             for _i in "$@"; do
1075                 for _f in "$_dir"/$_i; do
1076                     [[ "$_f" =~ $_pattern ]] || continue
1077                     [[ -e "$_f" ]] && _files+="$_f "
1078                 done
1079             done
1080         done
1081     else
1082         for _dir in $libdirs; do
1083             for _i in "$@"; do
1084                 for _f in "$_dir"/$_i; do
1085                     [[ -e "$_f" ]] && _files+="$_f "
1086                 done
1087             done
1088         done
1089     fi
1090     [[ $_files ]] && inst_multiple $_files
1091 }
1092
1093
1094 # install function decompressing the target and handling symlinks
1095 # $@ = list of compressed (gz or bz2) files or symlinks pointing to such files
1096 #
1097 # Function install targets in the same paths inside overlay but decompressed
1098 # and without extensions (.gz, .bz2).
1099 inst_decompress() {
1100     local _src _cmd
1101
1102     for _src in $@
1103     do
1104         case ${_src} in
1105             *.gz) _cmd='gzip -f -d' ;;
1106             *.bz2) _cmd='bzip2 -d' ;;
1107             *) return 1 ;;
1108         esac
1109         inst_simple ${_src}
1110         # Decompress with chosen tool.  We assume that tool changes name e.g.
1111         # from 'name.gz' to 'name'.
1112         ${_cmd} "${initdir}${_src}"
1113     done
1114 }
1115
1116 # It's similar to above, but if file is not compressed, performs standard
1117 # install.
1118 # $@ = list of files
1119 inst_opt_decompress() {
1120     local _src
1121
1122     for _src in $@
1123     do
1124         inst_decompress "${_src}" || inst "${_src}"
1125     done
1126 }
1127
1128 # module_check <dracut module>
1129 # execute the check() function of module-setup.sh of <dracut module>
1130 # or the "check" script, if module-setup.sh is not found
1131 # "check $hostonly" is called
1132 module_check() {
1133     local _moddir=$(echo ${dracutbasedir}/modules.d/??${1})
1134     local _ret
1135     local _forced=0
1136     local _hostonly=$hostonly
1137     [ $# -eq 2 ] && _forced=$2
1138     [[ -d $_moddir ]] || return 1
1139     if [[ ! -f $_moddir/module-setup.sh ]]; then
1140         # if we do not have a check script, we are unconditionally included
1141         [[ -x $_moddir/check ]] || return 0
1142         [ $_forced -ne 0 ] && unset hostonly
1143         $_moddir/check $hostonly
1144         _ret=$?
1145     else
1146         unset check depends cmdline install installkernel
1147         check() { true; }
1148         . $_moddir/module-setup.sh
1149         is_func check || return 0
1150         [ $_forced -ne 0 ] && unset hostonly
1151         moddir=$_moddir check $hostonly
1152         _ret=$?
1153         unset check depends cmdline install installkernel
1154     fi
1155     hostonly=$_hostonly
1156     return $_ret
1157 }
1158
1159 # module_check_mount <dracut module>
1160 # execute the check() function of module-setup.sh of <dracut module>
1161 # or the "check" script, if module-setup.sh is not found
1162 # "mount_needs=1 check 0" is called
1163 module_check_mount() {
1164     local _moddir=$(echo ${dracutbasedir}/modules.d/??${1})
1165     local _ret
1166     mount_needs=1
1167     [[ -d $_moddir ]] || return 1
1168     if [[ ! -f $_moddir/module-setup.sh ]]; then
1169         # if we do not have a check script, we are unconditionally included
1170         [[ -x $_moddir/check ]] || return 0
1171         mount_needs=1 $_moddir/check 0
1172         _ret=$?
1173     else
1174         unset check depends cmdline install installkernel
1175         check() { false; }
1176         . $_moddir/module-setup.sh
1177         moddir=$_moddir check 0
1178         _ret=$?
1179         unset check depends cmdline install installkernel
1180     fi
1181     unset mount_needs
1182     return $_ret
1183 }
1184
1185 # module_depends <dracut module>
1186 # execute the depends() function of module-setup.sh of <dracut module>
1187 # or the "depends" script, if module-setup.sh is not found
1188 module_depends() {
1189     local _moddir=$(echo ${dracutbasedir}/modules.d/??${1})
1190     local _ret
1191     [[ -d $_moddir ]] || return 1
1192     if [[ ! -f $_moddir/module-setup.sh ]]; then
1193         # if we do not have a check script, we have no deps
1194         [[ -x $_moddir/check ]] || return 0
1195         $_moddir/check -d
1196         return $?
1197     else
1198         unset check depends cmdline install installkernel
1199         depends() { true; }
1200         . $_moddir/module-setup.sh
1201         moddir=$_moddir depends
1202         _ret=$?
1203         unset check depends cmdline install installkernel
1204         return $_ret
1205     fi
1206 }
1207
1208 # module_cmdline <dracut module>
1209 # execute the cmdline() function of module-setup.sh of <dracut module>
1210 # or the "cmdline" script, if module-setup.sh is not found
1211 module_cmdline() {
1212     local _moddir=$(echo ${dracutbasedir}/modules.d/??${1})
1213     local _ret
1214     [[ -d $_moddir ]] || return 1
1215     if [[ ! -f $_moddir/module-setup.sh ]]; then
1216         [[ -x $_moddir/cmdline ]] && . "$_moddir/cmdline"
1217         return $?
1218     else
1219         unset check depends cmdline install installkernel
1220         cmdline() { true; }
1221         . $_moddir/module-setup.sh
1222         moddir=$_moddir cmdline
1223         _ret=$?
1224         unset check depends cmdline install installkernel
1225         return $_ret
1226     fi
1227 }
1228
1229 # module_install <dracut module>
1230 # execute the install() function of module-setup.sh of <dracut module>
1231 # or the "install" script, if module-setup.sh is not found
1232 module_install() {
1233     local _moddir=$(echo ${dracutbasedir}/modules.d/??${1})
1234     local _ret
1235     [[ -d $_moddir ]] || return 1
1236     if [[ ! -f $_moddir/module-setup.sh ]]; then
1237         [[ -x $_moddir/install ]] && . "$_moddir/install"
1238         return $?
1239     else
1240         unset check depends cmdline install installkernel
1241         install() { true; }
1242         . $_moddir/module-setup.sh
1243         moddir=$_moddir install
1244         _ret=$?
1245         unset check depends cmdline install installkernel
1246         return $_ret
1247     fi
1248 }
1249
1250 # module_installkernel <dracut module>
1251 # execute the installkernel() function of module-setup.sh of <dracut module>
1252 # or the "installkernel" script, if module-setup.sh is not found
1253 module_installkernel() {
1254     local _moddir=$(echo ${dracutbasedir}/modules.d/??${1})
1255     local _ret
1256     [[ -d $_moddir ]] || return 1
1257     if [[ ! -f $_moddir/module-setup.sh ]]; then
1258         [[ -x $_moddir/installkernel ]] && . "$_moddir/installkernel"
1259         return $?
1260     else
1261         unset check depends cmdline install installkernel
1262         installkernel() { true; }
1263         . $_moddir/module-setup.sh
1264         moddir=$_moddir installkernel
1265         _ret=$?
1266         unset check depends cmdline install installkernel
1267         return $_ret
1268     fi
1269 }
1270
1271 # check_mount <dracut module>
1272 # check_mount checks, if a dracut module is needed for the given
1273 # device and filesystem types in "${host_fs_types[@]}"
1274 check_mount() {
1275     local _mod=$1
1276     local _moddir=$(echo ${dracutbasedir}/modules.d/??${1})
1277     local _ret
1278     local _moddep
1279
1280     [ "${#host_fs_types[*]}" -le 0 ] && return 1
1281
1282     # If we are already scheduled to be loaded, no need to check again.
1283     [[ " $mods_to_load " == *\ $_mod\ * ]] && return 0
1284     [[ " $mods_checked_as_dep " == *\ $_mod\ * ]] && return 1
1285
1286     # This should never happen, but...
1287     [[ -d $_moddir ]] || return 1
1288
1289     [[ $2 ]] || mods_checked_as_dep+=" $_mod "
1290
1291     if [[ " $omit_dracutmodules " == *\ $_mod\ * ]]; then
1292         return 1
1293     fi
1294
1295     if [[ " $dracutmodules $add_dracutmodules $force_add_dracutmodules" == *\ $_mod\ * ]]; then
1296         module_check_mount $_mod; ret=$?
1297
1298         # explicit module, so also accept ret=255
1299         [[ $ret = 0 || $ret = 255 ]] || return 1
1300     else
1301         # module not in our list
1302         if [[ $dracutmodules = all ]]; then
1303             # check, if we can and should install this module
1304             module_check_mount $_mod || return 1
1305         else
1306             # skip this module
1307             return 1
1308         fi
1309     fi
1310
1311     for _moddep in $(module_depends $_mod); do
1312         # handle deps as if they were manually added
1313         [[ " $dracutmodules " == *\ $_mod\ * ]] \
1314             && [[ " $dracutmodules " != *\ $_moddep\ * ]] \
1315             && dracutmodules+=" $_moddep "
1316         [[ " $add_dracutmodules " == *\ $_mod\ * ]] \
1317             && [[ " $add_dracutmodules " != *\ $_moddep\ * ]] \
1318             && add_dracutmodules+=" $_moddep "
1319         [[ " $force_add_dracutmodules " == *\ $_mod\ * ]] \
1320             && [[ " $force_add_dracutmodules " != *\ $_moddep\ * ]] \
1321             && force_add_dracutmodules+=" $_moddep "
1322         # if a module we depend on fail, fail also
1323         if ! check_module $_moddep; then
1324             derror "dracut module '$_mod' depends on '$_moddep', which can't be installed"
1325             return 1
1326         fi
1327     done
1328
1329     [[ " $mods_to_load " == *\ $_mod\ * ]] || \
1330         mods_to_load+=" $_mod "
1331
1332     return 0
1333 }
1334
1335 # check_module <dracut module> [<use_as_dep>]
1336 # check if a dracut module is to be used in the initramfs process
1337 # if <use_as_dep> is set, then the process also keeps track
1338 # that the modules were checked for the dependency tracking process
1339 check_module() {
1340     local _mod=$1
1341     local _moddir=$(echo ${dracutbasedir}/modules.d/??${1})
1342     local _ret
1343     local _moddep
1344     # If we are already scheduled to be loaded, no need to check again.
1345     [[ " $mods_to_load " == *\ $_mod\ * ]] && return 0
1346     [[ " $mods_checked_as_dep " == *\ $_mod\ * ]] && return 1
1347
1348     # This should never happen, but...
1349     [[ -d $_moddir ]] || return 1
1350
1351     [[ $2 ]] || mods_checked_as_dep+=" $_mod "
1352
1353     if [[ " $omit_dracutmodules " == *\ $_mod\ * ]]; then
1354         dinfo "dracut module '$_mod' will not be installed, because it's in the list to be omitted!"
1355         return 1
1356     fi
1357
1358     if [[ " $dracutmodules $add_dracutmodules $force_add_dracutmodules" == *\ $_mod\ * ]]; then
1359         if [[ " $dracutmodules $force_add_dracutmodules " == *\ $_mod\ * ]]; then
1360             module_check $_mod 1; ret=$?
1361         else
1362             module_check $_mod 0; ret=$?
1363         fi
1364         # explicit module, so also accept ret=255
1365         [[ $ret = 0 || $ret = 255 ]] || return 1
1366     else
1367         # module not in our list
1368         if [[ $dracutmodules = all ]]; then
1369             # check, if we can and should install this module
1370             module_check $_mod; ret=$?
1371             if [[ $ret != 0 ]]; then
1372                 [[ $2 ]] && return 1
1373                 [[ $ret != 255 ]] && return 1
1374             fi
1375         else
1376             # skip this module
1377             return 1
1378         fi
1379     fi
1380
1381     for _moddep in $(module_depends $_mod); do
1382         # handle deps as if they were manually added
1383         [[ " $dracutmodules " == *\ $_mod\ * ]] \
1384             && [[ " $dracutmodules " != *\ $_moddep\ * ]] \
1385             && dracutmodules+=" $_moddep "
1386         [[ " $add_dracutmodules " == *\ $_mod\ * ]] \
1387             && [[ " $add_dracutmodules " != *\ $_moddep\ * ]] \
1388             && add_dracutmodules+=" $_moddep "
1389         [[ " $force_add_dracutmodules " == *\ $_mod\ * ]] \
1390             && [[ " $force_add_dracutmodules " != *\ $_moddep\ * ]] \
1391             && force_add_dracutmodules+=" $_moddep "
1392         # if a module we depend on fail, fail also
1393         if ! check_module $_moddep; then
1394             derror "dracut module '$_mod' depends on '$_moddep', which can't be installed"
1395             return 1
1396         fi
1397     done
1398
1399     [[ " $mods_to_load " == *\ $_mod\ * ]] || \
1400         mods_to_load+=" $_mod "
1401
1402     return 0
1403 }
1404
1405 # for_each_module_dir <func>
1406 # execute "<func> <dracut module> 1"
1407 for_each_module_dir() {
1408     local _modcheck
1409     local _mod
1410     local _moddir
1411     local _func
1412     _func=$1
1413     for _moddir in "$dracutbasedir/modules.d"/[0-9][0-9]*; do
1414         [[ -d $_moddir ]] || continue;
1415         [[ -e $_moddir/install || -e $_moddir/installkernel || \
1416             -e $_moddir/module-setup.sh ]] || continue
1417         _mod=${_moddir##*/}; _mod=${_mod#[0-9][0-9]}
1418         $_func $_mod 1
1419     done
1420
1421     # Report any missing dracut modules, the user has specified
1422     _modcheck="$add_dracutmodules $force_add_dracutmodules"
1423     [[ $dracutmodules != all ]] && _modcheck="$_modcheck $dracutmodules"
1424     for _mod in $_modcheck; do
1425         [[ " $mods_to_load " == *\ $_mod\ * ]] && continue
1426
1427         [[ " $force_add_dracutmodules " != *\ $_mod\ * ]] \
1428             && [[ " $dracutmodules " != *\ $_mod\ * ]] \
1429             && [[ " $omit_dracutmodules " == *\ $_mod\ * ]] \
1430             && continue
1431
1432         derror "dracut module '$_mod' cannot be found or installed."
1433         [[ " $force_add_dracutmodules " == *\ $_mod\ * ]] && exit 1
1434         [[ " $dracutmodules " == *\ $_mod\ * ]] && exit 1
1435         [[ " $add_dracutmodules " == *\ $_mod\ * ]] && exit 1
1436     done
1437 }
1438
1439 # Install a single kernel module along with any firmware it may require.
1440 # $1 = full path to kernel module to install
1441 install_kmod_with_fw() {
1442     # no need to go further if the module is already installed
1443
1444     [[ -e "${initdir}/lib/modules/$kernel/${1##*/lib/modules/$kernel/}" ]] \
1445         && return 0
1446
1447     if [[ $DRACUT_KERNEL_LAZY_HASHDIR ]] && [[ -e "$DRACUT_KERNEL_LAZY_HASHDIR/${1##*/}" ]]; then
1448         read ret < "$DRACUT_KERNEL_LAZY_HASHDIR/${1##*/}"
1449         return $ret
1450     fi
1451
1452     if [[ $omit_drivers ]]; then
1453         local _kmod=${1##*/}
1454         _kmod=${_kmod%.ko*}
1455         _kmod=${_kmod/-/_}
1456         if [[ "$_kmod" =~ $omit_drivers ]]; then
1457             dinfo "Omitting driver $_kmod"
1458             return 0
1459         fi
1460         if [[ "${1##*/lib/modules/$kernel/}" =~ $omit_drivers ]]; then
1461             dinfo "Omitting driver $_kmod"
1462             return 0
1463         fi
1464     fi
1465
1466     if [[ $silent_omit_drivers ]]; then
1467         local _kmod=${1##*/}
1468         _kmod=${_kmod%.ko*}
1469         _kmod=${_kmod/-/_}
1470         [[ "$_kmod" =~ $silent_omit_drivers ]] && return 0
1471         [[ "${1##*/lib/modules/$kernel/}" =~ $silent_omit_drivers ]] && return 0
1472     fi
1473
1474     inst_simple "$1" "/lib/modules/$kernel/${1##*/lib/modules/$kernel/}"
1475     ret=$?
1476     [[ $DRACUT_KERNEL_LAZY_HASHDIR ]] && \
1477         [[ -d "$DRACUT_KERNEL_LAZY_HASHDIR" ]] && \
1478         echo $ret > "$DRACUT_KERNEL_LAZY_HASHDIR/${1##*/}"
1479     (($ret != 0)) && return $ret
1480
1481     local _modname=${1##*/} _fwdir _found _fw
1482     _modname=${_modname%.ko*}
1483     for _fw in $(modinfo -k $kernel -F firmware $1 2>/dev/null); do
1484         _found=''
1485         for _fwdir in $fw_dir; do
1486             if [[ -d $_fwdir && -f $_fwdir/$_fw ]]; then
1487                 inst_simple "$_fwdir/$_fw" "/lib/firmware/$_fw"
1488                 _found=yes
1489             fi
1490         done
1491         if [[ $_found != yes ]]; then
1492             if ! [[ -d $(echo /sys/module/${_modname//-/_}|{ read a b; echo $a; }) ]]; then
1493                 dinfo "Possible missing firmware \"${_fw}\" for kernel module" \
1494                     "\"${_modname}.ko\""
1495             else
1496                 dwarn "Possible missing firmware \"${_fw}\" for kernel module" \
1497                     "\"${_modname}.ko\""
1498             fi
1499         fi
1500     done
1501     return 0
1502 }
1503
1504 # Do something with all the dependencies of a kernel module.
1505 # Note that kernel modules depend on themselves using the technique we use
1506 # $1 = function to call for each dependency we find
1507 #      It will be passed the full path to the found kernel module
1508 # $2 = module to get dependencies for
1509 # rest of args = arguments to modprobe
1510 # _fderr specifies FD passed from surrounding scope
1511 for_each_kmod_dep() {
1512     local _func=$1 _kmod=$2 _cmd _modpath _options
1513     shift 2
1514     modprobe "$@" --ignore-install --show-depends $_kmod 2>&${_fderr} | (
1515         while read _cmd _modpath _options; do
1516             [[ $_cmd = insmod ]] || continue
1517             $_func ${_modpath} || exit $?
1518         done
1519     )
1520 }
1521
1522 dracut_kernel_post() {
1523     local _moddirname=${srcmods%%/lib/modules/*}
1524     local _pid
1525
1526     if [[ $DRACUT_KERNEL_LAZY_HASHDIR ]] && [[ -f "$DRACUT_KERNEL_LAZY_HASHDIR/lazylist" ]]; then
1527         xargs -r modprobe -a ${_moddirname:+-d ${_moddirname}/} \
1528             --ignore-install --show-depends --set-version $kernel \
1529             < "$DRACUT_KERNEL_LAZY_HASHDIR/lazylist" 2>/dev/null \
1530             | sort -u \
1531             | while read _cmd _modpath _options; do
1532             [[ $_cmd = insmod ]] || continue
1533             echo "$_modpath"
1534         done > "$DRACUT_KERNEL_LAZY_HASHDIR/lazylist.dep"
1535
1536         (
1537             if [[ $DRACUT_INSTALL ]] && [[ -z $_moddirname ]]; then
1538                 xargs -r $DRACUT_INSTALL ${initdir:+-D "$initdir"} ${loginstall:+-L "$loginstall"} -a < "$DRACUT_KERNEL_LAZY_HASHDIR/lazylist.dep"
1539             else
1540                 while read _modpath; do
1541                     local _destpath=$_modpath
1542                     [[ $_moddirname ]] && _destpath=${_destpath##$_moddirname/}
1543                     _destpath=${_destpath##*/lib/modules/$kernel/}
1544                     inst_simple "$_modpath" "/lib/modules/$kernel/${_destpath}" || exit $?
1545                 done < "$DRACUT_KERNEL_LAZY_HASHDIR/lazylist.dep"
1546             fi
1547         ) &
1548         _pid=$(jobs -p | while read a ; do printf ":$a";done)
1549         _pid=${_pid##*:}
1550
1551         if [[ $DRACUT_INSTALL ]]; then
1552             xargs -r modinfo -k $kernel -F firmware < "$DRACUT_KERNEL_LAZY_HASHDIR/lazylist.dep" \
1553                 | while read line; do
1554                 for _fwdir in $fw_dir; do
1555                     echo $_fwdir/$line;
1556                 done;
1557             done | xargs -r $DRACUT_INSTALL ${initdir:+-D "$initdir"} ${loginstall:+-L "$loginstall"} -a -o
1558         else
1559             for _fw in $(xargs -r modinfo -k $kernel -F firmware < "$DRACUT_KERNEL_LAZY_HASHDIR/lazylist.dep"); do
1560                 for _fwdir in $fw_dir; do
1561                     if [[ -d $_fwdir && -f $_fwdir/$_fw ]]; then
1562                         inst_simple "$_fwdir/$_fw" "/lib/firmware/$_fw"
1563                         break
1564                     fi
1565                 done
1566             done
1567         fi
1568
1569         wait $_pid
1570     fi
1571
1572     for _f in modules.builtin.bin modules.builtin modules.order; do
1573         [[ $srcmods/$_f ]] && inst_simple "$srcmods/$_f" "/lib/modules/$kernel/$_f"
1574     done
1575
1576     # generate module dependencies for the initrd
1577     if [[ -d $initdir/lib/modules/$kernel ]] && \
1578         ! depmod -a -b "$initdir" $kernel; then
1579         dfatal "\"depmod -a $kernel\" failed."
1580         exit 1
1581     fi
1582
1583     [[ $DRACUT_KERNEL_LAZY_HASHDIR ]] && rm -fr -- "$DRACUT_KERNEL_LAZY_HASHDIR"
1584 }
1585
1586 [[ "$kernel_current" ]] || export kernel_current=$(uname -r)
1587
1588 module_is_host_only() {
1589     local _mod=$1
1590     local _modenc a i _k _s _v _aliases
1591     _mod=${_mod##*/}
1592     _mod=${_mod%.ko*}
1593     _modenc=${_mod//-/_}
1594
1595     [[ " $add_drivers " == *\ ${_mod}\ * ]] && return 0
1596
1597     # check if module is loaded
1598     [[ ${host_modules["$_modenc"]} ]] && return 0
1599
1600     [[ "$kernel_current" ]] || export kernel_current=$(uname -r)
1601
1602     if [[ "$kernel_current" != "$kernel" ]]; then
1603         # check if module is loadable on the current kernel
1604         # this covers the case, where a new module is introduced
1605         # or a module was renamed
1606         # or a module changed from builtin to a module
1607
1608         if [[ -d /lib/modules/$kernel_current ]]; then
1609             # if the modinfo can be parsed, but the module
1610             # is not loaded, then we can safely return 1
1611             modinfo -F filename "$_mod" &>/dev/null && return 1
1612         fi
1613
1614         _aliases=$(modinfo -k $kernel -F alias $_mod 2>/dev/null)
1615
1616         # if the module has no aliases, install it
1617         [[ $_aliases ]] || return 0
1618
1619         # finally check all modalias
1620         for a in $_aliases; do
1621             for i in "${!host_modalias[@]}"; do
1622                 [[ $i == $a ]]  && return 0
1623             done
1624         done
1625
1626     fi
1627
1628     return 1
1629 }
1630
1631 find_kernel_modules_by_path () {
1632     local _OLDIFS
1633
1634     [[ -f "$srcmods/modules.dep" ]] || return 0
1635
1636     _OLDIFS=$IFS
1637     IFS=:
1638     while read a rest; do
1639         [[ $a = */$1/* ]] || [[ $a = updates/* ]] || continue
1640         printf "%s\n" "$srcmods/$a"
1641     done < "$srcmods/modules.dep"
1642     IFS=$_OLDIFS
1643     return 0
1644 }
1645
1646 find_kernel_modules () {
1647     find_kernel_modules_by_path  drivers
1648 }
1649
1650 # instmods [-c [-s]] <kernel module> [<kernel module> ... ]
1651 # instmods [-c [-s]] <kernel subsystem>
1652 # install kernel modules along with all their dependencies.
1653 # <kernel subsystem> can be e.g. "=block" or "=drivers/usb/storage"
1654 instmods() {
1655     [[ $no_kernel = yes ]] && return
1656     # called [sub]functions inherit _fderr
1657     local _fderr=9
1658     local _check=no
1659     local _silent=no
1660     if [[ $1 = '-c' ]]; then
1661         _check=yes
1662         shift
1663     fi
1664
1665     if [[ $1 = '-s' ]]; then
1666         _silent=yes
1667         shift
1668     fi
1669
1670     function inst1mod() {
1671         local _ret=0 _mod="$1"
1672         case $_mod in
1673             =*)
1674                 ( [[ "$_mpargs" ]] && echo $_mpargs
1675                     find_kernel_modules_by_path "${_mod#=}" ) \
1676                         | instmods
1677                 ((_ret+=$?))
1678                 ;;
1679             --*) _mpargs+=" $_mod" ;;
1680             *)
1681                 _mod=${_mod##*/}
1682                 # Check for aliased modules
1683                 _modalias=$(modinfo -k $kernel -F filename $_mod 2> /dev/null)
1684                 _modalias=${_modalias%.ko*}
1685                 if [[ $_modalias ]] && [ "${_modalias##*/}" != "${_mod%.ko*}" ] ; then
1686                     _mod=${_modalias##*/}
1687                 fi
1688
1689                 # if we are already installed, skip this module and go on
1690                 # to the next one.
1691                 if [[ $DRACUT_KERNEL_LAZY_HASHDIR ]] && \
1692                     [[ -f "$DRACUT_KERNEL_LAZY_HASHDIR/${_mod%.ko*}" ]]; then
1693                     read _ret <"$DRACUT_KERNEL_LAZY_HASHDIR/${_mod%.ko*}"
1694                     return $_ret
1695                 fi
1696
1697                 _mod=${_mod/-/_}
1698                 if [[ $omit_drivers ]] && [[ "$_mod" =~ $omit_drivers ]]; then
1699                     dinfo "Omitting driver ${_mod##$srcmods}"
1700                     return 0
1701                 fi
1702
1703                 # If we are building a host-specific initramfs and this
1704                 # module is not already loaded, move on to the next one.
1705                 [[ $hostonly ]] \
1706                     && ! module_is_host_only "$_mod" \
1707                     && return 0
1708
1709                 if [[ "$_check" = "yes" ]] || ! [[ $DRACUT_KERNEL_LAZY_HASHDIR ]]; then
1710                     # We use '-d' option in modprobe only if modules prefix path
1711                     # differs from default '/'.  This allows us to use dracut with
1712                     # old version of modprobe which doesn't have '-d' option.
1713                     local _moddirname=${srcmods%%/lib/modules/*}
1714                     [[ -n ${_moddirname} ]] && _moddirname="-d ${_moddirname}/"
1715
1716                     # ok, load the module, all its dependencies, and any firmware
1717                     # it may require
1718                     for_each_kmod_dep install_kmod_with_fw $_mod \
1719                         --set-version $kernel ${_moddirname} $_mpargs
1720                     ((_ret+=$?))
1721                 else
1722                     [[ $DRACUT_KERNEL_LAZY_HASHDIR ]] && \
1723                         echo ${_mod%.ko*} >> "$DRACUT_KERNEL_LAZY_HASHDIR/lazylist"
1724                 fi
1725                 ;;
1726         esac
1727         return $_ret
1728     }
1729
1730     function instmods_1() {
1731         local _mod _mpargs
1732         if (($# == 0)); then  # filenames from stdin
1733             while read _mod; do
1734                 inst1mod "${_mod%.ko*}" || {
1735                     if [[ "$_check" == "yes" ]] && [[ "$_silent" == "no" ]]; then
1736                         dfatal "Failed to install module $_mod"
1737                     fi
1738                 }
1739             done
1740         fi
1741         while (($# > 0)); do  # filenames as arguments
1742             inst1mod ${1%.ko*} || {
1743                 if [[ "$_check" == "yes" ]] && [[ "$_silent" == "no" ]]; then
1744                     dfatal "Failed to install module $1"
1745                 fi
1746             }
1747             shift
1748         done
1749         return 0
1750     }
1751
1752     local _ret _filter_not_found='FATAL: Module .* not found.'
1753     # Capture all stderr from modprobe to _fderr. We could use {var}>...
1754     # redirections, but that would make dracut require bash4 at least.
1755     eval "( instmods_1 \"\$@\" ) ${_fderr}>&1" \
1756         | while read line; do [[ "$line" =~ $_filter_not_found ]] || echo $line;done | derror
1757     _ret=$?
1758     return $_ret
1759 }
1760
1761 check_kernel_config()
1762 {
1763     local _config_opt="$1"
1764     local _config_file
1765     [[ -f /boot/config-$kernel ]] \
1766         && _config_file="/boot/config-$kernel"
1767     [[ -f /lib/modules/$kernel/config ]] \
1768         && _config_file="/lib/modules/$kernel/config"
1769
1770     # no kernel config file, so return true
1771     [[ $_config_file ]] || return 0
1772
1773     grep -q -F "${_config_opt}=" "$_config_file" && return 0
1774     return 1
1775 }
1776
1777
1778 # get_cpu_vendor
1779 # Only two values are returned: AMD or Intel
1780 get_cpu_vendor ()
1781 {
1782     if grep -qE AMD /proc/cpuinfo; then
1783         printf "AMD"
1784     fi
1785     if grep -qE Intel /proc/cpuinfo; then
1786         printf "Intel"
1787     fi
1788 }
1789
1790 # get_host_ucode
1791 # Get the hosts' ucode file based on the /proc/cpuinfo
1792 get_ucode_file ()
1793 {
1794     local family=`grep -E "cpu family" /proc/cpuinfo | head -1 | sed s/.*:\ //`
1795     local model=`grep -E "model" /proc/cpuinfo |grep -v name | head -1 | sed s/.*:\ //`
1796     local stepping=`grep -E "stepping" /proc/cpuinfo | head -1 | sed s/.*:\ //`
1797
1798     if [[ "$(get_cpu_vendor)" == "AMD" ]]; then
1799         # If family greater or equal than 0x15
1800         if [[ $family -ge 21 ]]; then
1801             printf "microcode_amd_fam15h.bin"
1802         else
1803             printf "microcode_amd.bin"
1804         fi
1805     fi
1806     if [[ "$(get_cpu_vendor)" == "Intel" ]]; then
1807         # The /proc/cpuinfo are in decimal.
1808         printf "%02x-%02x-%02x" ${family} ${model} ${stepping}
1809     fi
1810 }
1811
1812 # Not every device in /dev/mapper should be examined.
1813 # If it is an LVM device, touch only devices which have /dev/VG/LV symlink.
1814 lvm_internal_dev() {
1815     local dev_dm_dir=/sys/dev/block/$1/dm
1816     [[ ! -f $dev_dm_dir/uuid || $(<$dev_dm_dir/uuid) != LVM-* ]] && return 1 # Not an LVM device
1817     local DM_VG_NAME DM_LV_NAME DM_LV_LAYER
1818     eval $(dmsetup splitname --nameprefixes --noheadings --rows "$(<$dev_dm_dir/name)" 2>/dev/null)
1819     [[ ${DM_VG_NAME} ]] && [[ ${DM_LV_NAME} ]] || return 0 # Better skip this!
1820     [[ ${DM_LV_LAYER} ]] || [[ ! -L /dev/${DM_VG_NAME}/${DM_LV_NAME} ]]
1821 }
1822