dracut-functions.sh

   1 #!/bin/bash
   2 # -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
   3 # ex: ts=8 sw=4 sts=4 et filetype=sh
   4 #
   5 # functions used by dracut and other tools.
   6 #
   7 # Copyright 2005-2009 Red Hat, Inc.  All rights reserved.
   8 #
   9 # This program is free software; you can redistribute it and/or modify
  10 # it under the terms of the GNU General Public License as published by
  11 # the Free Software Foundation; either version 2 of the License, or
  12 # (at your option) any later version.
  13 #
  14 # This program is distributed in the hope that it will be useful,
  15 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 # GNU General Public License for more details.
  18 #
  19 # You should have received a copy of the GNU General Public License
  20 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 #
  22 export LC_MESSAGES=C
  23
  24 if [[ $DRACUT_KERNEL_LAZY ]] && ! [[ $DRACUT_KERNEL_LAZY_HASHDIR ]]; then
  25     if ! [[ -d "$initdir/.kernelmodseen" ]]; then
  26         mkdir -p "$initdir/.kernelmodseen"
  27     fi
  28     DRACUT_KERNEL_LAZY_HASHDIR="$initdir/.kernelmodseen"
  29 fi
  30
  31 if [[ $initdir ]] && ! [[ -d $initdir ]]; then
  32     mkdir -p "$initdir"
  33 fi
  34
  35 # Generic substring function.  If $2 is in $1, return 0.
  36 strstr() { [[ $1 = *$2* ]]; }
  37
  38 # find a binary.  If we were not passed the full path directly,
  39 # search in the usual places to find the binary.
  40 find_binary() {
  41     if [[ -z ${1##/*} ]]; then
  42         if [[ -x $1 ]] || { strstr "$1" ".so" && ldd $1 &>/dev/null; };  then
  43             echo $1
  44             return 0
  45         fi
  46     fi
  47
  48     type -P ${1##*/}
  49 }
  50
  51 if ! [[ $dracutbasedir ]]; then
  52     dracutbasedir=${BASH_SOURCE[0]%/*}
  53     [[ $dracutbasedir = "dracut-functions" ]] && dracutbasedir="."
  54     [[ $dracutbasedir ]] || dracutbasedir="."
  55     dracutbasedir="$(readlink -f $dracutbasedir)"
  56 fi
  57
  58 if ! [[ $DRACUT_INSTALL ]]; then
  59     DRACUT_INSTALL=$(find_binary dracut-install)
  60 fi
  61
  62 if ! [[ $DRACUT_INSTALL ]] && [[ -x $dracutbasedir/dracut-install ]]; then
  63     DRACUT_INSTALL=$dracutbasedir/dracut-install
  64 fi
  65
  66 # Detect lib paths
  67 if ! [[ $libdirs ]] ; then
  68     if strstr "$(ldd /bin/sh)" "/lib64/" &>/dev/null \
  69         && [[ -d /lib64 ]]; then
  70         libdirs+=" /lib64"
  71         [[ -d /usr/lib64 ]] && libdirs+=" /usr/lib64"
  72     else
  73         libdirs+=" /lib"
  74         [[ -d /usr/lib ]] && libdirs+=" /usr/lib"
  75     fi
  76     export libdirs
  77 fi
  78
  79 if ! [[ $kernel ]]; then
  80     kernel=$(uname -r)
  81     export kernel
  82 fi
  83
  84 srcmods="/lib/modules/$kernel/"
  85 [[ $drivers_dir ]] && {
  86     if vercmp $(modprobe --version | cut -d' ' -f3) lt 3.7; then
  87         dfatal 'To use --kmoddir option module-init-tools >= 3.7 is required.'
  88         exit 1
  89     fi
  90     srcmods="$drivers_dir"
  91 }
  92 export srcmods
  93
  94 if ! type dinfo >/dev/null 2>&1; then
  95     . "$dracutbasedir/dracut-logger.sh"
  96     dlog_init
  97 fi
  98
  99 if ! [[ $initdir ]]; then
 100     dfatal "initdir not set"
 101     exit 1
 102 fi
 103
 104 # export standard hookdirs
 105 [[ $hookdirs ]] || {
 106     hookdirs="cmdline pre-udev pre-trigger netroot "
 107     hookdirs+="initqueue initqueue/settled initqueue/online initqueue/finished initqueue/timeout "
 108     hookdirs+="pre-mount pre-pivot cleanup mount "
 109     hookdirs+="emergency shutdown-emergency shutdown "
 110     export hookdirs
 111 }
 112
 113 # Create all subdirectories for given path without creating the last element.
 114 # $1 = path
 115 mksubdirs() { [[ -e ${1%/*} ]] || mkdir -m 0755 -p ${1%/*}; }
 116
 117 # Version comparision function.  Assumes Linux style version scheme.
 118 # $1 = version a
 119 # $2 = comparision op (gt, ge, eq, le, lt, ne)
 120 # $3 = version b
 121 vercmp() {
 122     local _n1=(${1//./ }) _op=$2 _n2=(${3//./ }) _i _res
 123
 124     for ((_i=0; ; _i++))
 125     do
 126         if [[ ! ${_n1[_i]}${_n2[_i]} ]]; then _res=0
 127         elif ((${_n1[_i]:-0} > ${_n2[_i]:-0})); then _res=1
 128         elif ((${_n1[_i]:-0} < ${_n2[_i]:-0})); then _res=2
 129         else continue
 130         fi
 131         break
 132     done
 133
 134     case $_op in
 135         gt) ((_res == 1));;
 136         ge) ((_res != 2));;
 137         eq) ((_res == 0));;
 138         le) ((_res != 1));;
 139         lt) ((_res == 2));;
 140         ne) ((_res != 0));;
 141     esac
 142 }
 143
 144 # is_func <command>
 145 # Check whether $1 is a function.
 146 is_func() {
 147     [[ $(type -t $1) = "function" ]]
 148 }
 149
 150 # Function prints global variables in format name=value line by line.
 151 # $@ = list of global variables' name
 152 print_vars() {
 153     local _var _value
 154
 155     for _var in $@
 156     do
 157         _value=$(eval echo \$$_var)
 158         [[ ${_value} ]] && echo "${_var}=\"${_value}\""
 159     done
 160 }
 161
 162 # normalize_path <path>
 163 # Prints the normalized path, where it removes any duplicated
 164 # and trailing slashes.
 165 # Example:
 166 # $ normalize_path ///test/test//
 167 # /test/test
 168 normalize_path() {
 169     shopt -q -s extglob
 170     set -- "${1//+(\/)//}"
 171     shopt -q -u extglob
 172     echo "${1%/}"
 173 }
 174
 175 # convert_abs_rel <from> <to>
 176 # Prints the relative path, when creating a symlink to <to> from <from>.
 177 # Example:
 178 # $ convert_abs_rel /usr/bin/test /bin/test-2
 179 # ../../bin/test-2
 180 # $ ln -s $(convert_abs_rel /usr/bin/test /bin/test-2) /usr/bin/test
 181 convert_abs_rel() {
 182     local __current __absolute __abssize __cursize __newpath
 183     local -i __i __level
 184
 185     set -- "$(normalize_path "$1")" "$(normalize_path "$2")"
 186
 187     # corner case #1 - self looping link
 188     [[ "$1" == "$2" ]] && { echo "${1##*/}"; return; }
 189
 190     # corner case #2 - own dir link
 191     [[ "${1%/*}" == "$2" ]] && { echo "."; return; }
 192
 193     IFS="/" __current=($1)
 194     IFS="/" __absolute=($2)
 195
 196     __abssize=${#__absolute[@]}
 197     __cursize=${#__current[@]}
 198
 199     while [[ ${__absolute[__level]} == ${__current[__level]} ]]
 200     do
 201         (( __level++ ))
 202         if (( __level > __abssize || __level > __cursize ))
 203         then
 204             break
 205         fi
 206     done
 207
 208     for ((__i = __level; __i < __cursize-1; __i++))
 209     do
 210         if ((__i > __level))
 211         then
 212             __newpath=$__newpath"/"
 213         fi
 214         __newpath=$__newpath".."
 215     done
 216
 217     for ((__i = __level; __i < __abssize; __i++))
 218     do
 219         if [[ -n $__newpath ]]
 220         then
 221             __newpath=$__newpath"/"
 222         fi
 223         __newpath=$__newpath${__absolute[__i]}
 224     done
 225
 226     echo "$__newpath"
 227 }
 228
 229 if strstr "$(ln --help)" "--relative"; then
 230     ln_r() {
 231         ln -sfnr "${initdir}/$1" "${initdir}/$2"
 232     }
 233 else
 234     ln_r() {
 235         local _source=$1
 236         local _dest=$2
 237         [[ -d "${_dest%/*}" ]] && _dest=$(readlink -f "${_dest%/*}")/${_dest##*/}
 238         ln -sfn $(convert_abs_rel "${_dest}" "${_source}") "${initdir}/${_dest}"
 239     }
 240 fi
 241
 242 get_persistent_dev() {
 243     local i _tmp _dev
 244
 245     _dev=$(udevadm info --query=name --name="$1" 2>/dev/null)
 246     [ -z "$_dev" ] && return
 247
 248     for i in /dev/mapper/* /dev/disk/by-uuid/* /dev/disk/by-id/*; do
 249         _tmp=$(udevadm info --query=name --name="$i" 2>/dev/null)
 250         if [ "$_tmp" = "$_dev" ]; then
 251             echo $i
 252             return
 253         fi
 254     done
 255 }
 256
 257 # get_fs_env <device>
 258 # Get and set the ID_FS_TYPE and ID_FS_UUID variable from udev for a device.
 259 # Example:
 260 # $ get_fs_env /dev/sda2; echo $ID_FS_TYPE; echo $ID_FS_UUID
 261 # ext4
 262 # 551a39aa-4ae9-4e70-a262-ef665cadb574
 263 get_fs_env() {
 264     local evalstr
 265     local found
 266
 267     [[ $1 ]] || return
 268     unset ID_FS_TYPE
 269     unset ID_FS_UUID
 270     if evalstr=$(udevadm info --query=env --name=$1 \
 271         | { while read line; do
 272             strstr "$line" "DEVPATH" && found=1;
 273             strstr "$line" "ID_FS_TYPE=" && { echo $line; exit 0;}
 274             done; [[ $found ]] && exit 0; exit 1; }) ; then
 275         eval $evalstr
 276         [[ $ID_FS_TYPE ]] && return 0
 277         return 1
 278     fi
 279
 280     # Fallback, if we don't have udev information
 281     if find_binary blkid >/dev/null; then
 282         eval $(blkid -o udev $1 \
 283             | while read line; do
 284                 strstr "$line" "ID_FS_TYPE=" && echo $line;
 285                 done)
 286         [[ $ID_FS_TYPE ]] && return 0
 287     fi
 288     return 1
 289 }
 290
 291 # get_maj_min <device>
 292 # Prints the major and minor of a device node.
 293 # Example:
 294 # $ get_maj_min /dev/sda2
 295 # 8:2
 296 get_maj_min() {
 297     local _dev
 298     _dev=$(stat -L -c '$((0x%t)):$((0x%T))' "$1" 2>/dev/null)
 299     _dev=$(eval "echo $_dev")
 300     echo $_dev
 301 }
 302
 303 # find_block_device <mountpoint>
 304 # Prints the major and minor number of the block device
 305 # for a given mountpoint.
 306 # Unless $use_fstab is set to "yes" the functions
 307 # uses /proc/self/mountinfo as the primary source of the
 308 # information and only falls back to /etc/fstab, if the mountpoint
 309 # is not found there.
 310 # Example:
 311 # $ find_block_device /usr
 312 # 8:4
 313 find_block_device() {
 314     local _x _mpt _majmin _dev _fs _maj _min
 315     if [[ $use_fstab != yes ]]; then
 316         while read _x _x _majmin _x _mpt _x _x _fs _dev _x; do
 317             [[ $_mpt = $1 ]] || continue
 318             [[ $_fs = nfs ]] && { echo $_dev; return 0;}
 319             [[ $_fs = nfs3 ]] && { echo $_dev; return 0;}
 320             [[ $_fs = nfs4 ]] && { echo $_dev; return 0;}
 321             [[ $_fs = btrfs ]] && {
 322                 get_maj_min $_dev
 323                 return 0;
 324             }
 325             if [[ ${_majmin#0:} = $_majmin ]]; then
 326                 echo $_majmin
 327                 return 0 # we have a winner!
 328             fi
 329         done < /proc/self/mountinfo
 330     fi
 331     # fall back to /etc/fstab
 332     while read _dev _mpt _fs _x; do
 333         [ "${_dev%%#*}" != "$_dev" ] && continue
 334
 335         if [[ $_mpt = $1 ]]; then
 336             [[ $_fs = nfs ]] && { echo $_dev; return 0;}
 337             [[ $_fs = nfs3 ]] && { echo $_dev; return 0;}
 338             [[ $_fs = nfs4 ]] && { echo $_dev; return 0;}
 339             [[ $_dev != ${_dev#UUID=} ]] && _dev=/dev/disk/by-uuid/${_dev#UUID=}
 340             [[ $_dev != ${_dev#LABEL=} ]] && _dev=/dev/disk/by-label/${_dev#LABEL=}
 341             [[ -b $_dev ]] || return 1 # oops, not a block device.
 342             get_maj_min "$_dev" && return 0
 343         fi
 344     done < /etc/fstab
 345
 346     return 1
 347 }
 348
 349 # find_dev_fstype <device>
 350 # Echo the filesystem type for a given device.
 351 # /proc/self/mountinfo is taken as the primary source of information
 352 # and /etc/fstab is used as a fallback.
 353 # No newline is appended!
 354 # Example:
 355 # $ find_dev_fstype /dev/sda2;echo
 356 # ext4
 357 find_dev_fstype() {
 358     local _x _mpt _majmin _dev _fs _maj _min
 359     while read _x _x _majmin _x _mpt _x _x _fs _dev _x; do
 360         [[ $_dev = $1 ]] || continue
 361         echo -n $_fs;
 362         return 0;
 363     done < /proc/self/mountinfo
 364
 365     # fall back to /etc/fstab
 366     while read _dev _mpt _fs _x; do
 367         [[ $_dev = $1 ]] || continue
 368         echo -n $_fs;
 369         return 0;
 370     done < /etc/fstab
 371
 372     return 1
 373 }
 374
 375 # find_mp_fstype <mountpoint>
 376 # Echo the filesystem type for a given mountpoint.
 377 # /proc/self/mountinfo is taken as the primary source of information
 378 # and /etc/fstab is used as a fallback.
 379 # No newline is appended!
 380 # Example:
 381 # $ find_mp_fstype /;echo
 382 # ext4
 383 find_mp_fstype() {
 384     local _x _mpt _majmin _dev _fs _maj _min
 385     while read _x _x _majmin _x _mpt _x _x _fs _dev _x; do
 386         [[ $_mpt = $1 ]] || continue
 387         echo -n $_fs;
 388         return 0;
 389     done < /proc/self/mountinfo
 390
 391     # fall back to /etc/fstab
 392     while read _dev _mpt _fs _x; do
 393         [[ $_mpt = $1 ]] || continue
 394         echo -n $_fs;
 395         return 0;
 396     done < /etc/fstab
 397
 398     return 1
 399 }
 400
 401 # finds the major:minor of the block device backing the root filesystem.
 402 find_root_block_device() { find_block_device /; }
 403
 404 # for_each_host_dev_fs <func>
 405 # Execute "<func> <dev> <filesystem>" for every "<dev>|<fs>" pair found
 406 # in ${host_fs_types[@]}
 407 for_each_host_dev_fs()
 408 {
 409     local _func="$1"
 410     local _dev
 411     local _fs
 412     local _ret=1
 413     for f in ${host_fs_types[@]}; do
 414         OLDIFS="$IFS"
 415         IFS="|"
 416         set -- $f
 417         IFS="$OLDIFS"
 418         _dev="$1"
 419         [[ -b "$_dev" ]] || continue
 420         _fs="$2"
 421         $_func $_dev $_fs && _ret=0
 422     done
 423     return $_ret
 424 }
 425
 426 # Walk all the slave relationships for a given block device.
 427 # Stop when our helper function returns success
 428 # $1 = function to call on every found block device
 429 # $2 = block device in major:minor format
 430 check_block_and_slaves() {
 431     local _x
 432     [[ -b /dev/block/$2 ]] || return 1 # Not a block device? So sorry.
 433     "$1" $2 && return
 434     check_vol_slaves "$@" && return 0
 435     if [[ -f /sys/dev/block/$2/../dev ]]; then
 436         check_block_and_slaves $1 $(cat "/sys/dev/block/$2/../dev") && return 0
 437     fi
 438     [[ -d /sys/dev/block/$2/slaves ]] || return 1
 439     for _x in /sys/dev/block/$2/slaves/*/dev; do
 440         [[ -f $_x ]] || continue
 441         check_block_and_slaves $1 $(cat "$_x") && return 0
 442     done
 443     return 1
 444 }
 445
 446 check_block_and_slaves_all() {
 447     local _x _ret=1
 448     [[ -b /dev/block/$2 ]] || return 1 # Not a block device? So sorry.
 449     if "$1" $2; then
 450           _ret=0
 451     fi
 452     check_vol_slaves "$@" && return 0
 453     if [[ -f /sys/dev/block/$2/../dev ]]; then
 454         check_block_and_slaves_all $1 $(cat "/sys/dev/block/$2/../dev") && _ret=0
 455     fi
 456     [[ -d /sys/dev/block/$2/slaves ]] || return 1
 457     for _x in /sys/dev/block/$2/slaves/*/dev; do
 458         [[ -f $_x ]] || continue
 459         check_block_and_slaves_all $1 $(cat "$_x") && _ret=0
 460     done
 461     return $_ret
 462 }
 463 # for_each_host_dev_and_slaves <func>
 464 # Execute "<func> <dev>" for every "<dev>" found
 465 # in ${host_devs[@]} and their slaves
 466 for_each_host_dev_and_slaves_all()
 467 {
 468     local _func="$1"
 469     local _dev
 470     local _ret=1
 471     for _dev in ${host_devs[@]}; do
 472         [[ -b "$_dev" ]] || continue
 473         if check_block_and_slaves_all $_func $(get_maj_min $_dev); then
 474                _ret=0
 475         fi
 476     done
 477     return $_ret
 478 }
 479
 480 for_each_host_dev_and_slaves()
 481 {
 482     local _func="$1"
 483     local _dev
 484     for _dev in ${host_devs[@]}; do
 485         [[ -b "$_dev" ]] || continue
 486         check_block_and_slaves $_func $(get_maj_min $_dev) && return 0
 487     done
 488     return 1
 489 }
 490
 491 # ugly workaround for the lvm design
 492 # There is no volume group device,
 493 # so, there are no slave devices for volume groups.
 494 # Logical volumes only have the slave devices they really live on,
 495 # but you cannot create the logical volume without the volume group.
 496 # And the volume group might be bigger than the devices the LV needs.
 497 check_vol_slaves() {
 498     local _lv _vg _pv
 499     for i in /dev/mapper/*; do
 500         _lv=$(get_maj_min $i)
 501         if [[ $_lv = $2 ]]; then
 502             _vg=$(lvm lvs --noheadings -o vg_name $i 2>/dev/null)
 503             # strip space
 504             _vg=$(echo $_vg)
 505             if [[ $_vg ]]; then
 506                 for _pv in $(lvm vgs --noheadings -o pv_name "$_vg" 2>/dev/null)
 507                 do
 508                     check_block_and_slaves $1 $(get_maj_min $_pv) && return 0
 509                 done
 510             fi
 511         fi
 512     done
 513     return 1
 514 }
 515
 516 # fs_get_option <filesystem options> <search for option>
 517 # search for a specific option in a bunch of filesystem options
 518 # and return the value
 519 fs_get_option() {
 520     local _fsopts=$1
 521     local _option=$2
 522     local OLDIFS="$IFS"
 523     IFS=,
 524     set -- $_fsopts
 525     IFS="$OLDIFS"
 526     while [ $# -gt 0 ]; do
 527         case $1 in
 528             $_option=*)
 529                 echo ${1#${_option}=}
 530                 break
 531         esac
 532         shift
 533     done
 534 }
 535
 536 if [[ $DRACUT_INSTALL ]]; then
 537     [[ $DRACUT_RESOLVE_LAZY ]] || export DRACUT_RESOLVE_DEPS=1
 538     inst_dir() {
 539         [[ -e ${initdir}/"$1" ]] && return 0  # already there
 540         $DRACUT_INSTALL ${initdir+-D "$initdir"} -d "$@"
 541         (($? != 0)) && derror $DRACUT_INSTALL ${initdir+-D "$initdir"} -d "$@" || :
 542     }
 543
 544     inst() {
 545         [[ -e ${initdir}/"${2:-$1}" ]] && return 0  # already there
 546         #dinfo "$DRACUT_INSTALL -l $@"
 547         $DRACUT_INSTALL ${initdir+-D "$initdir"} ${DRACUT_RESOLVE_DEPS+-l} ${DRACUT_FIPS_MODE+-H} "$@"
 548         (($? != 0)) && derror $DRACUT_INSTALL ${initdir+-D "$initdir"} ${DRACUT_RESOLVE_DEPS+-l} ${DRACUT_FIPS_MODE+-H} "$@" || :
 549     }
 550
 551     inst_simple() {
 552         [[ -e ${initdir}/"${2:-$1}" ]] && return 0  # already there
 553         [[ -e $1 ]] || return 1  # no source
 554         $DRACUT_INSTALL ${initdir+-D "$initdir"} "$@"
 555         (($? != 0)) && derror $DRACUT_INSTALL ${initdir+-D "$initdir"} "$@" || :
 556     }
 557
 558     inst_symlink() {
 559         [[ -e ${initdir}/"${2:-$1}" ]] && return 0  # already there
 560         [[ -L $1 ]] || return 1
 561         $DRACUT_INSTALL ${initdir+-D "$initdir"} ${DRACUT_RESOLVE_DEPS+-l}  ${DRACUT_FIPS_MODE+-H} "$@"
 562         (($? != 0)) && derror $DRACUT_INSTALL ${initdir+-D "$initdir"} ${DRACUT_RESOLVE_DEPS+-l}  ${DRACUT_FIPS_MODE+-H} "$@" || :
 563     }
 564
 565     dracut_install() {
 566         local ret
 567         #dinfo "initdir=$initdir $DRACUT_INSTALL -l $@"
 568         $DRACUT_INSTALL ${initdir+-D "$initdir"} -a ${DRACUT_RESOLVE_DEPS+-l}  ${DRACUT_FIPS_MODE+-H} "$@"
 569         ret=$?
 570         (($ret != 0)) && derror $DRACUT_INSTALL ${initdir+-D "$initdir"} -a ${DRACUT_RESOLVE_DEPS+-l}  ${DRACUT_FIPS_MODE+-H} "$@" || :
 571         return $ret
 572     }
 573
 574     inst_library() {
 575         [[ -e ${initdir}/"${2:-$1}" ]] && return 0  # already there
 576         [[ -e $1 ]] || return 1  # no source
 577         $DRACUT_INSTALL ${initdir+-D "$initdir"} ${DRACUT_RESOLVE_DEPS+-l}  ${DRACUT_FIPS_MODE+-H} "$@"
 578         (($? != 0)) && derror $DRACUT_INSTALL ${initdir+-D "$initdir"} ${DRACUT_RESOLVE_DEPS+-l}  ${DRACUT_FIPS_MODE+-H} "$@" || :
 579     }
 580
 581     inst_binary() {
 582         $DRACUT_INSTALL ${initdir+-D "$initdir"} ${DRACUT_RESOLVE_DEPS+-l}  ${DRACUT_FIPS_MODE+-H} "$@"
 583         (($? != 0)) && derror $DRACUT_INSTALL ${initdir+-D "$initdir"} ${DRACUT_RESOLVE_DEPS+-l}  ${DRACUT_FIPS_MODE+-H} "$@" || :
 584     }
 585
 586     inst_script() {
 587         $DRACUT_INSTALL ${initdir+-D "$initdir"} ${DRACUT_RESOLVE_DEPS+-l}  ${DRACUT_FIPS_MODE+-H} "$@"
 588         (($? != 0)) && derror $DRACUT_INSTALL ${initdir+-D "$initdir"} ${DRACUT_RESOLVE_DEPS+-l}  ${DRACUT_FIPS_MODE+-H} "$@" || :
 589     }
 590
 591 else
 592
 593     # Install a directory, keeping symlinks as on the original system.
 594     # Example: if /lib points to /lib64 on the host, "inst_dir /lib/file"
 595     # will create ${initdir}/lib64, ${initdir}/lib64/file,
 596     # and a symlink ${initdir}/lib -> lib64.
 597     inst_dir() {
 598         [[ -e ${initdir}/"$1" ]] && return 0  # already there
 599
 600         local _dir="$1" _part="${1%/*}" _file
 601         while [[ "$_part" != "${_part%/*}" ]] && ! [[ -e "${initdir}/${_part}" ]]; do
 602             _dir="$_part $_dir"
 603             _part=${_part%/*}
 604         done
 605
 606         # iterate over parent directories
 607         for _file in $_dir; do
 608             [[ -e "${initdir}/$_file" ]] && continue
 609             if [[ -L $_file ]]; then
 610                 inst_symlink "$_file"
 611             else
 612             # create directory
 613                 mkdir -m 0755 -p "${initdir}/$_file" || return 1
 614                 [[ -e "$_file" ]] && chmod --reference="$_file" "${initdir}/$_file"
 615                 chmod u+w "${initdir}/$_file"
 616             fi
 617         done
 618     }
 619
 620     # $1 = file to copy to ramdisk
 621     # $2 (optional) Name for the file on the ramdisk
 622     # Location of the image dir is assumed to be $initdir
 623     # We never overwrite the target if it exists.
 624     inst_simple() {
 625         [[ -f "$1" ]] || return 1
 626         strstr "$1" "/" || return 1
 627         local _src=$1 _target="${2:-$1}"
 628
 629         [[ -L $_src ]] && { inst_symlink $_src $_target; return $?; }
 630
 631         if ! [[ -d ${initdir}/$_target ]]; then
 632             [[ -e ${initdir}/$_target ]] && return 0
 633             [[ -L ${initdir}/$_target ]] && return 0
 634             [[ -d "${initdir}/${_target%/*}" ]] || inst_dir "${_target%/*}"
 635         fi
 636         if [[ $DRACUT_FIPS_MODE ]]; then
 637             # install checksum files also
 638             if [[ -e "${_src%/*}/.${_src##*/}.hmac" ]]; then
 639                 inst "${_src%/*}/.${_src##*/}.hmac" "${_target%/*}/.${_target##*/}.hmac"
 640             fi
 641             if [[ -e "/lib/fipscheck/${_src##*/}.hmac" ]]; then
 642                 inst "/lib/fipscheck/${_src##*/}.hmac" "/lib/fipscheck/${_target##*/}.hmac"
 643             fi
 644             if [[ -e "/lib64/fipscheck/${_src##*/}.hmac" ]]; then
 645                 inst "/lib64/fipscheck/${_src##*/}.hmac" "/lib64/fipscheck/${_target##*/}.hmac"
 646             fi
 647         fi
 648         ddebug "Installing $_src"
 649         cp --reflink=auto --sparse=auto -pfL "$_src" "${initdir}/$_target"
 650     }
 651
 652     # same as above, but specialized for symlinks
 653     inst_symlink() {
 654         local _src=$1 _target=${2:-$1} _realsrc
 655         strstr "$1" "/" || return 1
 656         [[ -L $1 ]] || return 1
 657         [[ -L $initdir/$_target ]] && return 0
 658         _realsrc=$(readlink -f "$_src")
 659         if ! [[ -e $initdir/$_realsrc ]]; then
 660             if [[ -d $_realsrc ]]; then
 661                 inst_dir "$_realsrc"
 662             else
 663                 inst "$_realsrc"
 664             fi
 665         fi
 666         [[ ! -e $initdir/${_target%/*} ]] && inst_dir "${_target%/*}"
 667
 668         ln_r "${_realsrc}" "${_target}"
 669     }
 670
 671     # Same as above, but specialized to handle dynamic libraries.
 672     # It handles making symlinks according to how the original library
 673     # is referenced.
 674     inst_library() {
 675         local _src="$1" _dest=${2:-$1} _lib _reallib _symlink
 676         strstr "$1" "/" || return 1
 677         [[ -e $initdir/$_dest ]] && return 0
 678         if [[ -L $_src ]]; then
 679             if [[ $DRACUT_FIPS_MODE ]]; then
 680                 # install checksum files also
 681                 if [[ -e "${_src%/*}/.${_src##*/}.hmac" ]]; then
 682                     inst "${_src%/*}/.${_src##*/}.hmac" "${_dest%/*}/.${_dest##*/}.hmac"
 683                 fi
 684                 if [[ -e "/lib/fipscheck/${_src##*/}.hmac" ]]; then
 685                     inst "/lib/fipscheck/${_src##*/}.hmac" "/lib/fipscheck/${_dest##*/}.hmac"
 686                 fi
 687                 if [[ -e "/lib64/fipscheck/${_src##*/}.hmac" ]]; then
 688                     inst "/lib64/fipscheck/${_src##*/}.hmac" "/lib64/fipscheck/${_dest##*/}.hmac"
 689                 fi
 690             fi
 691             _reallib=$(readlink -f "$_src")
 692             inst_simple "$_reallib" "$_reallib"
 693             inst_dir "${_dest%/*}"
 694             ln_r "${_reallib}" "${_dest}"
 695         else
 696             inst_simple "$_src" "$_dest"
 697         fi
 698
 699         # Create additional symlinks.  See rev_symlinks description.
 700         for _symlink in $(rev_lib_symlinks $_src) $(rev_lib_symlinks $_reallib); do
 701             [[ ! -e $initdir/$_symlink ]] && {
 702                 ddebug "Creating extra symlink: $_symlink"
 703                 inst_symlink $_symlink
 704             }
 705         done
 706     }
 707
 708     # Same as above, but specialized to install binary executables.
 709     # Install binary executable, and all shared library dependencies, if any.
 710     inst_binary() {
 711         local _bin _target
 712         _bin=$(find_binary "$1") || return 1
 713         _target=${2:-$_bin}
 714         [[ -e $initdir/$_target ]] && return 0
 715         local _file _line
 716         local _so_regex='([^ ]*/lib[^/]*/[^ ]*\.so[^ ]*)'
 717         # I love bash!
 718         LC_ALL=C ldd "$_bin" 2>/dev/null | while read _line; do
 719             [[ $_line = 'not a dynamic executable' ]] && break
 720
 721             if [[ $_line =~ $_so_regex ]]; then
 722                 _file=${BASH_REMATCH[1]}
 723                 [[ -e ${initdir}/$_file ]] && continue
 724                 inst_library "$_file"
 725                 continue
 726             fi
 727
 728             if [[ $_line =~ not\ found ]]; then
 729                 dfatal "Missing a shared library required by $_bin."
 730                 dfatal "Run \"ldd $_bin\" to find out what it is."
 731                 dfatal "$_line"
 732                 dfatal "dracut cannot create an initrd."
 733                 exit 1
 734             fi
 735         done
 736         inst_simple "$_bin" "$_target"
 737     }
 738
 739     # same as above, except for shell scripts.
 740     # If your shell script does not start with shebang, it is not a shell script.
 741     inst_script() {
 742         local _bin
 743         _bin=$(find_binary "$1") || return 1
 744         shift
 745         local _line _shebang_regex
 746         read -r -n 80 _line <"$_bin"
 747         # If debug is set, clean unprintable chars to prevent messing up the term
 748         [[ $debug ]] && _line=$(echo -n "$_line" | tr -c -d '[:print:][:space:]')
 749         _shebang_regex='(#! *)(/[^ ]+).*'
 750         [[ $_line =~ $_shebang_regex ]] || return 1
 751         inst "${BASH_REMATCH[2]}" && inst_simple "$_bin" "$@"
 752     }
 753
 754     # general purpose installation function
 755     # Same args as above.
 756     inst() {
 757         local _x
 758
 759         case $# in
 760             1) ;;
 761             2) [[ ! $initdir && -d $2 ]] && export initdir=$2
 762                 [[ $initdir = $2 ]] && set $1;;
 763             3) [[ -z $initdir ]] && export initdir=$2
 764                 set $1 $3;;
 765             *) dfatal "inst only takes 1 or 2 or 3 arguments"
 766                 exit 1;;
 767         esac
 768         for _x in inst_symlink inst_script inst_binary inst_simple; do
 769             $_x "$@" && return 0
 770         done
 771         return 1
 772     }
 773
 774     # dracut_install [-o ] <file> [<file> ... ]
 775     # Install <file> to the initramfs image
 776     # -o optionally install the <file> and don't fail, if it is not there
 777     dracut_install() {
 778         local _optional=no
 779         if [[ $1 = '-o' ]]; then
 780             _optional=yes
 781             shift
 782         fi
 783         while (($# > 0)); do
 784             if ! inst "$1" ; then
 785                 if [[ $_optional = yes ]]; then
 786                     dinfo "Skipping program $1 as it cannot be found and is" \
 787                         "flagged to be optional"
 788                 else
 789                     dfatal "Failed to install $1"
 790                     exit 1
 791                 fi
 792             fi
 793             shift
 794         done
 795     }
 796
 797 fi
 798
 799 # find symlinks linked to given library file
 800 # $1 = library file
 801 # Function searches for symlinks by stripping version numbers appended to
 802 # library filename, checks if it points to the same target and finally
 803 # prints the list of symlinks to stdout.
 804 #
 805 # Example:
 806 # rev_lib_symlinks libfoo.so.8.1
 807 # output: libfoo.so.8 libfoo.so
 808 # (Only if libfoo.so.8 and libfoo.so exists on host system.)
 809 rev_lib_symlinks() {
 810     [[ ! $1 ]] && return 0
 811
 812     local fn="$1" orig="$(readlink -f "$1")" links=''
 813
 814     [[ ${fn} =~ .*\.so\..* ]] || return 1
 815
 816     until [[ ${fn##*.} == so ]]; do
 817         fn="${fn%.*}"
 818         [[ -L ${fn} && $(readlink -f "${fn}") == ${orig} ]] && links+=" ${fn}"
 819     done
 820
 821     echo "${links}"
 822 }
 823
 824 # attempt to install any programs specified in a udev rule
 825 inst_rule_programs() {
 826     local _prog _bin
 827
 828     if grep -qE 'PROGRAM==?"[^ "]+' "$1"; then
 829         for _prog in $(grep -E 'PROGRAM==?"[^ "]+' "$1" | sed -r 's/.*PROGRAM==?"([^ "]+).*/\1/'); do
 830             if [ -x ${udevdir}/$_prog ]; then
 831                 _bin=${udevdir}/$_prog
 832             else
 833                 _bin=$(find_binary "$_prog") || {
 834                     dinfo "Skipping program $_prog using in udev rule ${1##*/} as it cannot be found"
 835                     continue;
 836                 }
 837             fi
 838
 839             #dinfo "Installing $_bin due to it's use in the udev rule $(${1##*/})"
 840             dracut_install "$_bin"
 841         done
 842     fi
 843     if grep -qE 'RUN[+=]=?"[^ "]+' "$1"; then
 844         for _prog in $(grep -E 'RUN[+=]=?"[^ "]+' "$1" | sed -r 's/.*RUN[+=]=?"([^ "]+).*/\1/'); do
 845             if [ -x ${udevdir}/$_prog ]; then
 846                 _bin=${udevdir}/$_prog
 847             else
 848                 _bin=$(find_binary "$_prog") || {
 849                     dinfo "Skipping program $_prog using in udev rule ${1##*/} as it cannot be found"
 850                     continue;
 851                 }
 852             fi
 853
 854             #dinfo "Installing $_bin due to it's use in the udev rule $(${1##*/})"
 855             dracut_install "$_bin"
 856         done
 857     fi
 858     if grep -qE 'IMPORT\{program\}==?"[^ "]+' "$1"; then
 859         for _prog in $(grep -E 'IMPORT\{program\}==?"[^ "]+' "$1" | sed -r 's/.*IMPORT\{program\}==?"([^ "]+).*/\1/'); do
 860             if [ -x ${udevdir}/$_prog ]; then
 861                 _bin=${udevdir}/$_prog
 862             else
 863                 _bin=$(find_binary "$_prog") || {
 864                     dinfo "Skipping program $_prog using in udev rule ${1##*/} as it cannot be found"
 865                     continue;
 866                 }
 867             fi
 868
 869             #dinfo "Installing $_bin due to it's use in the udev rule $(${1##*/})"
 870             dracut_install "$_bin"
 871         done
 872     fi
 873 }
 874
 875 # attempt to install any programs specified in a udev rule
 876 inst_rule_group_owner() {
 877     local i
 878
 879     if grep -qE 'OWNER=?"[^ "]+' "$1"; then
 880         for i in $(grep -E 'OWNER=?"[^ "]+' "$1" | sed -r 's/.*OWNER=?"([^ "]+).*/\1/'); do
 881             if ! egrep -q "^$i:" "$initdir/etc/passwd" 2>/dev/null; then
 882                 egrep "^$i:" /etc/passwd 2>/dev/null >> "$initdir/etc/passwd"
 883             fi
 884         done
 885     fi
 886     if grep -qE 'GROUP=?"[^ "]+' "$1"; then
 887         for i in $(grep -E 'GROUP=?"[^ "]+' "$1" | sed -r 's/.*GROUP=?"([^ "]+).*/\1/'); do
 888             if ! egrep -q "^$i:" "$initdir/etc/group" 2>/dev/null; then
 889                 egrep "^$i:" /etc/group 2>/dev/null >> "$initdir/etc/group"
 890             fi
 891         done
 892     fi
 893 }
 894
 895 # udev rules always get installed in the same place, so
 896 # create a function to install them to make life simpler.
 897 inst_rules() {
 898     local _target=/etc/udev/rules.d _rule _found
 899
 900     inst_dir "${udevdir}/rules.d"
 901     inst_dir "$_target"
 902     for _rule in "$@"; do
 903         if [ "${rule#/}" = "$rule" ]; then
 904             for r in ${udevdir}/rules.d /etc/udev/rules.d; do
 905                 if [[ -f $r/$_rule ]]; then
 906                     _found="$r/$_rule"
 907                     inst_rule_programs "$_found"
 908                     inst_rule_group_owner "$_found"
 909                     inst_simple "$_found"
 910                 fi
 911             done
 912         fi
 913         for r in '' ./ $dracutbasedir/rules.d/; do
 914             if [[ -f ${r}$_rule ]]; then
 915                 _found="${r}$_rule"
 916                 inst_rule_programs "$_found"
 917                 inst_rule_group_owner "$_found"
 918                 inst_simple "$_found" "$_target/${_found##*/}"
 919             fi
 920         done
 921         [[ $_found ]] || dinfo "Skipping udev rule: $_rule"
 922     done
 923 }
 924
 925 # install function specialized for hooks
 926 # $1 = type of hook, $2 = hook priority (lower runs first), $3 = hook
 927 # All hooks should be POSIX/SuS compliant, they will be sourced by init.
 928 inst_hook() {
 929     if ! [[ -f $3 ]]; then
 930         dfatal "Cannot install a hook ($3) that does not exist."
 931         dfatal "Aborting initrd creation."
 932         exit 1
 933     elif ! strstr "$hookdirs" "$1"; then
 934         dfatal "No such hook type $1. Aborting initrd creation."
 935         exit 1
 936     fi
 937     inst_simple "$3" "/lib/dracut/hooks/${1}/${2}-${3##*/}"
 938 }
 939
 940 # install any of listed files
 941 #
 942 # If first argument is '-d' and second some destination path, first accessible
 943 # source is installed into this path, otherwise it will installed in the same
 944 # path as source.  If none of listed files was installed, function return 1.
 945 # On first successful installation it returns with 0 status.
 946 #
 947 # Example:
 948 #
 949 # inst_any -d /bin/foo /bin/bar /bin/baz
 950 #
 951 # Lets assume that /bin/baz exists, so it will be installed as /bin/foo in
 952 # initramfs.
 953 inst_any() {
 954     local to f
 955
 956     [[ $1 = '-d' ]] && to="$2" && shift 2
 957
 958     for f in "$@"; do
 959         if [[ -e $f ]]; then
 960             [[ $to ]] && inst "$f" "$to" && return 0
 961             inst "$f" && return 0
 962         fi
 963     done
 964
 965     return 1
 966 }
 967
 968
 969 # inst_libdir_file [-n <pattern>] <file> [<file>...]
 970 # Install a <file> located on a lib directory to the initramfs image
 971 # -n <pattern> install matching files
 972 inst_libdir_file() {
 973     local _files
 974     if [[ "$1" == "-n" ]]; then
 975         local _pattern=$2
 976         shift 2
 977         for _dir in $libdirs; do
 978             for _i in "$@"; do
 979                 for _f in "$_dir"/$_i; do
 980                     [[ "$_f" =~ $_pattern ]] || continue
 981                     [[ -e "$_f" ]] && _files+="$_f "
 982                 done
 983             done
 984         done
 985     else
 986         for _dir in $libdirs; do
 987             for _i in "$@"; do
 988                 for _f in "$_dir"/$_i; do
 989                     [[ -e "$_f" ]] && _files+="$_f "
 990                 done
 991             done
 992         done
 993     fi
 994     [[ $_files ]] && dracut_install $_files
 995 }
 996
 997
 998 # install function decompressing the target and handling symlinks
 999 # $@ = list of compressed (gz or bz2) files or symlinks pointing to such files
1000 #
1001 # Function install targets in the same paths inside overlay but decompressed
1002 # and without extensions (.gz, .bz2).
1003 inst_decompress() {
1004     local _src _cmd
1005
1006     for _src in $@
1007     do
1008         case ${_src} in
1009             *.gz) _cmd='gzip -d' ;;
1010             *.bz2) _cmd='bzip2 -d' ;;
1011             *) return 1 ;;
1012         esac
1013         inst_simple ${_src}
1014         # Decompress with chosen tool.  We assume that tool changes name e.g.
1015         # from 'name.gz' to 'name'.
1016         ${_cmd} "${initdir}${_src}"
1017     done
1018 }
1019
1020 # It's similar to above, but if file is not compressed, performs standard
1021 # install.
1022 # $@ = list of files
1023 inst_opt_decompress() {
1024     local _src
1025
1026     for _src in $@
1027     do
1028         inst_decompress "${_src}" || inst "${_src}"
1029     done
1030 }
1031
1032 # module_check <dracut module>
1033 # execute the check() function of module-setup.sh of <dracut module>
1034 # or the "check" script, if module-setup.sh is not found
1035 # "check $hostonly" is called
1036 module_check() {
1037     local _moddir=$(echo ${dracutbasedir}/modules.d/??${1})
1038     local _ret
1039     local _forced=0
1040     local _hostonly=$hostonly
1041     [ $# -eq 2 ] && _forced=$2
1042     [[ -d $_moddir ]] || return 1
1043     if [[ ! -f $_moddir/module-setup.sh ]]; then
1044         # if we do not have a check script, we are unconditionally included
1045         [[ -x $_moddir/check ]] || return 0
1046         [ $_forced -ne 0 ] && unset hostonly
1047         $_moddir/check $hostonly
1048         _ret=$?
1049     else
1050         unset check depends install installkernel
1051         . $_moddir/module-setup.sh
1052         is_func check || return 0
1053         [ $_forced -ne 0 ] && unset hostonly
1054         check $hostonly
1055         _ret=$?
1056         unset check depends install installkernel
1057     fi
1058     hostonly=$_hostonly
1059     return $_ret
1060 }
1061
1062 # module_check_mount <dracut module>
1063 # execute the check() function of module-setup.sh of <dracut module>
1064 # or the "check" script, if module-setup.sh is not found
1065 # "mount_needs=1 check 0" is called
1066 module_check_mount() {
1067     local _moddir=$(echo ${dracutbasedir}/modules.d/??${1})
1068     local _ret
1069     mount_needs=1
1070     [[ -d $_moddir ]] || return 1
1071     if [[ ! -f $_moddir/module-setup.sh ]]; then
1072         # if we do not have a check script, we are unconditionally included
1073         [[ -x $_moddir/check ]] || return 0
1074         mount_needs=1 $_moddir/check 0
1075         _ret=$?
1076     else
1077         unset check depends install installkernel
1078         . $_moddir/module-setup.sh
1079         is_func check || return 1
1080         check 0
1081         _ret=$?
1082         unset check depends install installkernel
1083     fi
1084     unset mount_needs
1085     return $_ret
1086 }
1087
1088 # module_depends <dracut module>
1089 # execute the depends() function of module-setup.sh of <dracut module>
1090 # or the "depends" script, if module-setup.sh is not found
1091 module_depends() {
1092     local _moddir=$(echo ${dracutbasedir}/modules.d/??${1})
1093     local _ret
1094     [[ -d $_moddir ]] || return 1
1095     if [[ ! -f $_moddir/module-setup.sh ]]; then
1096         # if we do not have a check script, we have no deps
1097         [[ -x $_moddir/check ]] || return 0
1098         $_moddir/check -d
1099         return $?
1100     else
1101         unset check depends install installkernel
1102         . $_moddir/module-setup.sh
1103         is_func depends || return 0
1104         depends
1105         _ret=$?
1106         unset check depends install installkernel
1107         return $_ret
1108     fi
1109 }
1110
1111 # module_install <dracut module>
1112 # execute the install() function of module-setup.sh of <dracut module>
1113 # or the "install" script, if module-setup.sh is not found
1114 module_install() {
1115     local _moddir=$(echo ${dracutbasedir}/modules.d/??${1})
1116     local _ret
1117     [[ -d $_moddir ]] || return 1
1118     if [[ ! -f $_moddir/module-setup.sh ]]; then
1119         [[ -x $_moddir/install ]] && . "$_moddir/install"
1120         return $?
1121     else
1122         unset check depends install installkernel
1123         . $_moddir/module-setup.sh
1124         is_func install || return 0
1125         install
1126         _ret=$?
1127         unset check depends install installkernel
1128         return $_ret
1129     fi
1130 }
1131
1132 # module_installkernel <dracut module>
1133 # execute the installkernel() function of module-setup.sh of <dracut module>
1134 # or the "installkernel" script, if module-setup.sh is not found
1135 module_installkernel() {
1136     local _moddir=$(echo ${dracutbasedir}/modules.d/??${1})
1137     local _ret
1138     [[ -d $_moddir ]] || return 1
1139     if [[ ! -f $_moddir/module-setup.sh ]]; then
1140         [[ -x $_moddir/installkernel ]] && . "$_moddir/installkernel"
1141         return $?
1142     else
1143         unset check depends install installkernel
1144         . $_moddir/module-setup.sh
1145         is_func installkernel || return 0
1146         installkernel
1147         _ret=$?
1148         unset check depends install installkernel
1149         return $_ret
1150     fi
1151 }
1152
1153 # check_mount <dracut module>
1154 # check_mount checks, if a dracut module is needed for the given
1155 # device and filesystem types in "${host_fs_types[@]}"
1156 check_mount() {
1157     local _mod=$1
1158     local _moddir=$(echo ${dracutbasedir}/modules.d/??${1})
1159     local _ret
1160     local _moddep
1161
1162     [ "${#host_fs_types[*]}" -le 0 ] && return 1
1163
1164     # If we are already scheduled to be loaded, no need to check again.
1165     strstr " $mods_to_load " " $_mod " && return 0
1166     strstr " $mods_checked_as_dep " " $_mod " && return 1
1167
1168     # This should never happen, but...
1169     [[ -d $_moddir ]] || return 1
1170
1171     [[ $2 ]] || mods_checked_as_dep+=" $_mod "
1172
1173     if strstr " $omit_dracutmodules " " $_mod "; then
1174         dinfo "Dracut module '$_mod' will not be installed, because it's in the list to be omitted!"
1175         return 1
1176     fi
1177
1178     if strstr " $dracutmodules $add_dracutmodules $force_add_dracutmodules" " $_mod "; then
1179         module_check_mount $_mod; ret=$?
1180
1181         # explicit module, so also accept ret=255
1182         [[ $ret = 0 || $ret = 255 ]] || return 1
1183     else
1184         # module not in our list
1185         if [[ $dracutmodules = all ]]; then
1186             # check, if we can and should install this module
1187             module_check_mount $_mod || return 1
1188         else
1189             # skip this module
1190             return 1
1191         fi
1192     fi
1193
1194
1195     for _moddep in $(module_depends $_mod); do
1196         # handle deps as if they were manually added
1197         strstr " $add_dracutmodules " " $_moddep " || \
1198             add_dracutmodules+=" $_moddep "
1199         strstr " $force_add_dracutmodules " " $_moddep " || \
1200             force_add_dracutmodules+=" $_moddep "
1201         # if a module we depend on fail, fail also
1202         if ! check_module $_moddep; then
1203             derror "Dracut module '$_mod' depends on '$_moddep', which can't be installed"
1204             return 1
1205         fi
1206     done
1207
1208     strstr " $mods_to_load " " $_mod " || \
1209         mods_to_load+=" $_mod "
1210
1211     return 0
1212 }
1213
1214 # check_module <dracut module> [<use_as_dep>]
1215 # check if a dracut module is to be used in the initramfs process
1216 # if <use_as_dep> is set, then the process also keeps track
1217 # that the modules were checked for the dependency tracking process
1218 check_module() {
1219     local _mod=$1
1220     local _moddir=$(echo ${dracutbasedir}/modules.d/??${1})
1221     local _ret
1222     local _moddep
1223     # If we are already scheduled to be loaded, no need to check again.
1224     strstr " $mods_to_load " " $_mod " && return 0
1225     strstr " $mods_checked_as_dep " " $_mod " && return 1
1226
1227     # This should never happen, but...
1228     [[ -d $_moddir ]] || return 1
1229
1230     [[ $2 ]] || mods_checked_as_dep+=" $_mod "
1231
1232     if strstr " $omit_dracutmodules " " $_mod "; then
1233         dinfo "Dracut module '$_mod' will not be installed, because it's in the list to be omitted!"
1234         return 1
1235     fi
1236
1237     if strstr " $dracutmodules $add_dracutmodules $force_add_dracutmodules" " $_mod "; then
1238         if strstr " $force_add_dracutmodules" " $_mod"; then
1239             module_check $_mod 1; ret=$?
1240         else
1241             module_check $_mod 0; ret=$?
1242         fi
1243         # explicit module, so also accept ret=255
1244         [[ $ret = 0 || $ret = 255 ]] || return 1
1245     else
1246         # module not in our list
1247         if [[ $dracutmodules = all ]]; then
1248             # check, if we can and should install this module
1249             module_check $_mod || return 1
1250         else
1251             # skip this module
1252             return 1
1253         fi
1254     fi
1255
1256     for _moddep in $(module_depends $_mod); do
1257         # handle deps as if they were manually added
1258         strstr " $add_dracutmodules " " $_moddep " || \
1259             add_dracutmodules+=" $_moddep "
1260         strstr " $force_add_dracutmodules " " $_moddep " || \
1261             force_add_dracutmodules+=" $_moddep "
1262         # if a module we depend on fail, fail also
1263         if ! check_module $_moddep; then
1264             derror "Dracut module '$_mod' depends on '$_moddep', which can't be installed"
1265             return 1
1266         fi
1267     done
1268
1269     strstr " $mods_to_load " " $_mod " || \
1270         mods_to_load+=" $_mod "
1271
1272     return 0
1273 }
1274
1275 # for_each_module_dir <func>
1276 # execute "<func> <dracut module> 1"
1277 for_each_module_dir() {
1278     local _modcheck
1279     local _mod
1280     local _moddir
1281     local _func
1282     _func=$1
1283     for _moddir in "$dracutbasedir/modules.d"/[0-9][0-9]*; do
1284         _mod=${_moddir##*/}; _mod=${_mod#[0-9][0-9]}
1285         $_func $_mod 1
1286     done
1287
1288     # Report any missing dracut modules, the user has specified
1289     _modcheck="$add_dracutmodules $force_add_dracutmodules"
1290     [[ $dracutmodules != all ]] && _modcheck="$m $dracutmodules"
1291     for _mod in $_modcheck; do
1292         strstr "$mods_to_load" "$_mod" && continue
1293         strstr "$omit_dracutmodules" "$_mod" && continue
1294         derror "Dracut module '$_mod' cannot be found or installed."
1295     done
1296 }
1297
1298 # Install a single kernel module along with any firmware it may require.
1299 # $1 = full path to kernel module to install
1300 install_kmod_with_fw() {
1301     # no need to go further if the module is already installed
1302
1303     [[ -e "${initdir}/lib/modules/$kernel/${1##*/lib/modules/$kernel/}" ]] \
1304         && return 0
1305
1306     if [[ $DRACUT_KERNEL_LAZY_HASHDIR ]] && [[ -e "$DRACUT_KERNEL_LAZY_HASHDIR/${1##*/}" ]]; then
1307         read ret < "$DRACUT_KERNEL_LAZY_HASHDIR/${1##*/}"
1308         return $ret
1309     fi
1310
1311     if [[ $omit_drivers ]]; then
1312         local _kmod=${1##*/}
1313         _kmod=${_kmod%.ko}
1314         _kmod=${_kmod/-/_}
1315         if [[ "$_kmod" =~ $omit_drivers ]]; then
1316             dinfo "Omitting driver $_kmod"
1317             return 0
1318         fi
1319         if [[ "${1##*/lib/modules/$kernel/}" =~ $omit_drivers ]]; then
1320             dinfo "Omitting driver $_kmod"
1321             return 0
1322         fi
1323     fi
1324
1325     inst_simple "$1" "/lib/modules/$kernel/${1##*/lib/modules/$kernel/}"
1326     ret=$?
1327     [[ $DRACUT_KERNEL_LAZY_HASHDIR ]] && \
1328         [[ -d "$DRACUT_KERNEL_LAZY_HASHDIR" ]] && \
1329         echo $ret > "$DRACUT_KERNEL_LAZY_HASHDIR/${1##*/}"
1330     (($ret != 0)) && return $ret
1331
1332     local _modname=${1##*/} _fwdir _found _fw
1333     _modname=${_modname%.ko*}
1334     for _fw in $(modinfo -k $kernel -F firmware $1 2>/dev/null); do
1335         _found=''
1336         for _fwdir in $fw_dir; do
1337             if [[ -d $_fwdir && -f $_fwdir/$_fw ]]; then
1338                 inst_simple "$_fwdir/$_fw" "/lib/firmware/$_fw"
1339                 _found=yes
1340             fi
1341         done
1342         if [[ $_found != yes ]]; then
1343             if ! [[ -d $(echo /sys/module/${_modname//-/_}|{ read a b; echo $a; }) ]]; then
1344                 dinfo "Possible missing firmware \"${_fw}\" for kernel module" \
1345                     "\"${_modname}.ko\""
1346             else
1347                 dwarn "Possible missing firmware \"${_fw}\" for kernel module" \
1348                     "\"${_modname}.ko\""
1349             fi
1350         fi
1351     done
1352     return 0
1353 }
1354
1355 # Do something with all the dependencies of a kernel module.
1356 # Note that kernel modules depend on themselves using the technique we use
1357 # $1 = function to call for each dependency we find
1358 #      It will be passed the full path to the found kernel module
1359 # $2 = module to get dependencies for
1360 # rest of args = arguments to modprobe
1361 # _fderr specifies FD passed from surrounding scope
1362 for_each_kmod_dep() {
1363     local _func=$1 _kmod=$2 _cmd _modpath _options
1364     shift 2
1365     modprobe "$@" --ignore-install --show-depends $_kmod 2>&${_fderr} | (
1366         while read _cmd _modpath _options; do
1367             [[ $_cmd = insmod ]] || continue
1368             $_func ${_modpath} || exit $?
1369         done
1370     )
1371 }
1372
1373 dracut_kernel_post() {
1374     local _moddirname=${srcmods%%/lib/modules/*}
1375
1376     if [[ $DRACUT_KERNEL_LAZY_HASHDIR ]] && [[ -f "$DRACUT_KERNEL_LAZY_HASHDIR/lazylist" ]]; then
1377         xargs -r modprobe -a ${_moddirname+-d ${_moddirname}/} \
1378             --ignore-install --show-depends --set-version $kernel \
1379             < "$DRACUT_KERNEL_LAZY_HASHDIR/lazylist" 2>/dev/null \
1380             | sort -u \
1381             | while read _cmd _modpath _options; do
1382             [[ $_cmd = insmod ]] || continue
1383             echo "$_modpath"
1384         done > "$DRACUT_KERNEL_LAZY_HASHDIR/lazylist.dep"
1385
1386         (
1387             if [[ $DRACUT_INSTALL ]] && [[ -z $_moddirname ]]; then
1388                 xargs -r $DRACUT_INSTALL ${initdir+-D "$initdir"} -a < "$DRACUT_KERNEL_LAZY_HASHDIR/lazylist.dep"
1389             else
1390                 while read _modpath; do
1391                     local _destpath=$_modpath
1392                     [[ $_moddirname ]] && _destpath=${_destpath##$_moddirname/}
1393                     _destpath=${_destpath##*/lib/modules/$kernel/}
1394                     inst_simple "$_modpath" "/lib/modules/$kernel/${_destpath}" || exit $?
1395                 done < "$DRACUT_KERNEL_LAZY_HASHDIR/lazylist.dep"
1396             fi
1397         ) &
1398
1399         if [[ $DRACUT_INSTALL ]]; then
1400             xargs -r modinfo -k $kernel -F firmware < "$DRACUT_KERNEL_LAZY_HASHDIR/lazylist.dep" \
1401                 | while read line; do
1402                 for _fwdir in $fw_dir; do
1403                     echo $_fwdir/$line;
1404                 done;
1405             done | xargs -r $DRACUT_INSTALL ${initdir+-D "$initdir"} -a -o
1406         else
1407             for _fw in $(xargs -r modinfo -k $kernel -F firmware < "$DRACUT_KERNEL_LAZY_HASHDIR/lazylist.dep"); do
1408                 for _fwdir in $fw_dir; do
1409                     if [[ -d $_fwdir && -f $_fwdir/$_fw ]]; then
1410                         inst_simple "$_fwdir/$_fw" "/lib/firmware/$_fw"
1411                         break
1412                     fi
1413                 done
1414             done
1415         fi
1416
1417         wait
1418     fi
1419
1420     for _f in modules.builtin.bin modules.builtin; do
1421         [[ $srcmods/$_f ]] && break
1422     done || {
1423         dfatal "No modules.builtin.bin and modules.builtin found!"
1424         return 1
1425     }
1426
1427     for _f in modules.builtin.bin modules.builtin modules.order; do
1428         [[ $srcmods/$_f ]] && inst_simple "$srcmods/$_f" "/lib/modules/$kernel/$_f"
1429     done
1430
1431     # generate module dependencies for the initrd
1432     if [[ -d $initdir/lib/modules/$kernel ]] && \
1433         ! depmod -a -b "$initdir" $kernel; then
1434         dfatal "\"depmod -a $kernel\" failed."
1435         exit 1
1436     fi
1437
1438     [[ $DRACUT_KERNEL_LAZY_HASHDIR ]] && rm -fr "$DRACUT_KERNEL_LAZY_HASHDIR"
1439 }
1440
1441 module_is_host_only() (
1442     local _mod=$1
1443     _mod=${_mod##*/}
1444     _mod=${_mod%.ko}
1445
1446     [[ "$add_drivers" =~ " ${_mod} " ]] && return 0
1447
1448     # check if module is loaded
1449     [[ -d $(echo /sys/module/${_mod//-/_}|{ read a b; echo $a; }) ]] && return 0
1450
1451     # check if module is loadable on the current kernel
1452     # this covers the case, where a new module is introduced
1453     # or a module was renamed
1454     # or a module changed from builtin to a module
1455     modinfo -F filename "$_mod" &>/dev/null || return 0
1456
1457     return 1
1458 )
1459
1460 find_kernel_modules_by_path () (
1461     local _OLDIFS
1462         _OLDIFS=$IFS
1463         IFS=:
1464         while read a rest; do
1465             [[ $a = kernel*/$1/* ]] || continue
1466             echo $srcmods/$a
1467         done < $srcmods/modules.dep
1468         IFS=$_OLDIFS
1469     return 0
1470 )
1471
1472 find_kernel_modules () {
1473     find_kernel_modules_by_path  drivers
1474 }
1475
1476 # instmods [-c [-s]] <kernel module> [<kernel module> ... ]
1477 # instmods [-c [-s]] <kernel subsystem>
1478 # install kernel modules along with all their dependencies.
1479 # <kernel subsystem> can be e.g. "=block" or "=drivers/usb/storage"
1480 instmods() {
1481     [[ $no_kernel = yes ]] && return
1482     # called [sub]functions inherit _fderr
1483     local _fderr=9
1484     local _check=no
1485     local _silent=no
1486     if [[ $1 = '-c' ]]; then
1487         _check=yes
1488         shift
1489     fi
1490
1491     if [[ $1 = '-s' ]]; then
1492         _silent=yes
1493         shift
1494     fi
1495
1496     function inst1mod() {
1497         local _ret=0 _mod="$1"
1498         case $_mod in
1499             =*)
1500                 ( [[ "$_mpargs" ]] && echo $_mpargs
1501                     find_kernel_modules_by_path "${_mod#=}" ) \
1502                         | instmods
1503                 ((_ret+=$?))
1504                 ;;
1505             --*) _mpargs+=" $_mod" ;;
1506             *)
1507                 _mod=${_mod##*/}
1508                 # if we are already installed, skip this module and go on
1509                 # to the next one.
1510                 if [[ $DRACUT_KERNEL_LAZY_HASHDIR ]] && \
1511                     [[ -f "$DRACUT_KERNEL_LAZY_HASHDIR/${_mod%.ko}.ko" ]]; then
1512                     read _ret <"$DRACUT_KERNEL_LAZY_HASHDIR/${_mod%.ko}.ko"
1513                     return $_ret
1514                 fi
1515
1516                 if [[ $omit_drivers ]] && [[ "$1" =~ $omit_drivers ]]; then
1517                     dinfo "Omitting driver ${_mod##$srcmods}"
1518                     return 0
1519                 fi
1520
1521                 # If we are building a host-specific initramfs and this
1522                 # module is not already loaded, move on to the next one.
1523                 [[ $hostonly ]] \
1524                     && ! module_is_host_only "$_mod" \
1525                     && return 0
1526
1527                 if [[ "$_check" = "yes" ]] || ! [[ $DRACUT_KERNEL_LAZY_HASHDIR ]]; then
1528                     # We use '-d' option in modprobe only if modules prefix path
1529                     # differs from default '/'.  This allows us to use Dracut with
1530                     # old version of modprobe which doesn't have '-d' option.
1531                     local _moddirname=${srcmods%%/lib/modules/*}
1532                     [[ -n ${_moddirname} ]] && _moddirname="-d ${_moddirname}/"
1533
1534                     # ok, load the module, all its dependencies, and any firmware
1535                     # it may require
1536                     for_each_kmod_dep install_kmod_with_fw $_mod \
1537                         --set-version $kernel ${_moddirname} $_mpargs
1538                     ((_ret+=$?))
1539                 else
1540                     [[ $DRACUT_KERNEL_LAZY_HASHDIR ]] && \
1541                         echo $_mod >> "$DRACUT_KERNEL_LAZY_HASHDIR/lazylist"
1542                 fi
1543                 ;;
1544         esac
1545         return $_ret
1546     }
1547
1548     function instmods_1() {
1549         local _mod _mpargs
1550         if (($# == 0)); then  # filenames from stdin
1551             while read _mod; do
1552                 inst1mod "${_mod%.ko*}" || {
1553                     if [[ "$_check" == "yes" ]]; then
1554                         [[ "$_silent" == "no" ]] && dfatal "Failed to install $_mod"
1555                         return 1
1556                     fi
1557                 }
1558             done
1559         fi
1560         while (($# > 0)); do  # filenames as arguments
1561             inst1mod ${1%.ko*} || {
1562                 if [[ "$_check" == "yes" ]]; then
1563                     [[ "$_silent" == "no" ]] && dfatal "Failed to install $1"
1564                     return 1
1565                 fi
1566             }
1567             shift
1568         done
1569         return 0
1570     }
1571
1572     local _ret _filter_not_found='FATAL: Module .* not found.'
1573     # Capture all stderr from modprobe to _fderr. We could use {var}>...
1574     # redirections, but that would make dracut require bash4 at least.
1575     eval "( instmods_1 \"\$@\" ) ${_fderr}>&1" \
1576     | while read line; do [[ "$line" =~ $_filter_not_found ]] || echo $line;done | derror
1577     _ret=$?
1578     return $_ret
1579 }