summaryrefslogtreecommitdiff
path: root/test/test-functions
blob: 901ff4860541db194a73ff703e10f9840b55f7d0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
#!/bin/bash
# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
# ex: ts=8 sw=4 sts=4 et filetype=sh
PATH=/sbin:/bin:/usr/sbin:/usr/bin
export PATH

KERNEL_VER=${KERNEL_VER-$(uname -r)}
KERNEL_MODS="/lib/modules/$KERNEL_VER/"

if ! ROOTLIBDIR=$(pkg-config --variable=systemdutildir systemd); then
    echo "WARNING! Cannot determine rootlibdir from pkg-config, assuming /usr/lib/systemd" >&2
    ROOTLIBDIR=/usr/lib/systemd
fi

BASICTOOLS="sh bash setsid loadkeys setfont login sulogin gzip sleep echo mount umount cryptsetup date dmsetup modprobe"
DEBUGTOOLS="df free ls stty cat ps ln ip route dmesg dhclient mkdir cp ping dhclient strace less grep id tty touch du sort hostname"

function find_qemu_bin() {
    # SUSE and Red Hat call the binary qemu-kvm
    # Debian and Gentoo call it kvm
    [ "$QEMU_BIN" ] || QEMU_BIN=$(which -a kvm qemu-kvm 2>/dev/null | grep '^/' -m1)

    [ "$ARCH" ] || ARCH=$(uname -m)
    case $ARCH in
    x86_64)
        # QEMU's own build system calls it qemu-system-x86_64
        [ "$QEMU_BIN" ] || QEMU_BIN=$(which -a qemu-system-x86_64 2>/dev/null | grep '^/' -m1)
        ;;
    i*86)
        # new i386 version of QEMU
        [ "$QEMU_BIN" ] || QEMU_BIN=$(which -a qemu-system-i386 2>/dev/null | grep '^/' -m1)

        # i386 version of QEMU
        [ "$QEMU_BIN" ] || QEMU_BIN=$(which -a qemu 2>/dev/null | grep '^/' -m1)
        ;;
    esac

    if [ ! -e "$QEMU_BIN" ]; then
        echo "Could not find a suitable QEMU binary" >&2
        return 1
    fi
}

run_qemu() {
    if [ -f /etc/machine-id ]; then
        read MACHINE_ID < /etc/machine-id
        [ -z "$INITRD" ] && [ -e "/boot/$MACHINE_ID/$KERNEL_VER/initrd" ] \
            && INITRD="/boot/$MACHINE_ID/$KERNEL_VER/initrd"
        [ -z "$KERNEL_BIN" ] && [ -e "/boot/$MACHINE_ID/$KERNEL_VER/linux" ] \
            && KERNEL_BIN="/boot/$MACHINE_ID/$KERNEL_VER/linux"
    fi

    [ "$KERNEL_BIN" ] || KERNEL_BIN=/boot/vmlinuz-$KERNEL_VER
    [ "$INITRD" ]     || INITRD=/boot/initramfs-${KERNEL_VER}.img
    [ "$QEMU_SMP" ]   || QEMU_SMP=1

    find_qemu_bin || return 1

    KERNEL_APPEND="root=/dev/sda1 \
systemd.log_level=debug \
raid=noautodetect \
loglevel=2 \
init=$ROOTLIBDIR/systemd \
ro \
console=ttyS0 \
selinux=0 \
$KERNEL_APPEND \
"

    QEMU_OPTIONS="-machine accel=kvm:tcg \
-smp $QEMU_SMP \
-net none \
-m 512M \
-nographic \
-kernel $KERNEL_BIN \
"

    if [ "$INITRD" ]; then
        QEMU_OPTIONS="$QEMU_OPTIONS -initrd $INITRD"
    fi

    ( set -x
      $QEMU_BIN $QEMU_OPTIONS -append "$KERNEL_APPEND" $TESTDIR/rootdisk.img ) || return 1
}

run_nspawn() {
    set -x
    ../../systemd-nspawn --boot --directory=$TESTDIR/nspawn-root $ROOTLIBDIR/systemd $KERNEL_APPEND
}

setup_basic_environment() {
    # create the basic filesystem layout
    setup_basic_dirs

    install_systemd
    install_missing_libraries
    install_config_files
    create_rc_local
    install_basic_tools
    install_libnss
    install_pam
    install_dbus
    install_fonts
    install_keymaps
    install_terminfo
    install_execs
    install_plymouth
    install_debug_tools
    install_ld_so_conf
    strip_binaries
    install_depmod_files
    generate_module_dependencies
    # softlink mtab
    ln -fs /proc/self/mounts $initdir/etc/mtab
}

install_dmevent() {
    instmods dm_crypt =crypto
    type -P dmeventd >/dev/null && dracut_install dmeventd
    inst_libdir_file "libdevmapper-event.so*"
    inst_rules 10-dm.rules 13-dm-disk.rules 95-dm-notify.rules
}

install_systemd() {
    # install compiled files
    (cd $TEST_BASE_DIR/..; set -x; make DESTDIR=$initdir install)
    # remove unneeded documentation
    rm -fr $initdir/usr/share/{man,doc,gtk-doc}
    # we strip binaries since debug symbols increase binaries size a lot
    # and it could fill the available space
    strip_binaries
}

install_missing_libraries() {
    # install possible missing libraries
    for i in $initdir/{sbin,bin}/* $initdir/lib/systemd/*; do
        inst_libs $i
    done
}

create_empty_image() {
    rm -f "$TESTDIR/rootdisk.img"
    # Create the blank file to use as a root filesystem
    dd if=/dev/null of="$TESTDIR/rootdisk.img" bs=1M seek=300
    LOOPDEV=$(losetup --show -P -f $TESTDIR/rootdisk.img)
    [ -b "$LOOPDEV" ] || return 1
    echo "LOOPDEV=$LOOPDEV" >> $STATEFILE
    sfdisk "$LOOPDEV" <<EOF
,290M
,
EOF

    mkfs.ext3 -L systemd "${LOOPDEV}p1"
}

check_result_nspawn() {
    ret=1
    [[ -e $TESTDIR/nspawn-root/testok ]] && ret=0
    [[ -f $TESTDIR/nspawn-root/failed ]] && cp -a $TESTDIR/nspawn-root/failed $TESTDIR
    cp -a $TESTDIR/nspawn-root/var/log/journal $TESTDIR
    [[ -f $TESTDIR/failed ]] && cat $TESTDIR/failed
    ls -l $TESTDIR/journal/*/*.journal
    test -s $TESTDIR/failed && ret=$(($ret+1))
    return $ret
}

strip_binaries() {
    ddebug "Strip binaries"
    find "$initdir" -executable -not -path '*/lib/modules/*.ko' -type f | xargs strip --strip-unneeded | ddebug
}

create_rc_local() {
    mkdir -p $initdir/etc/rc.d
    cat >$initdir/etc/rc.d/rc.local <<EOF
#!/bin/bash
exit 0
EOF
    chmod 0755 $initdir/etc/rc.d/rc.local
}

install_execs() {
    # install any Execs from the service files
    egrep -ho '^Exec[^ ]*=[^ ]+' $initdir/lib/systemd/system/*.service \
        | while read i; do
        i=${i##Exec*=}; i=${i##-}
        inst $i
    done
}

generate_module_dependencies() {
    if [[ -d $initdir/lib/modules/$KERNEL_VER ]] && \
        ! depmod -a -b "$initdir" $KERNEL_VER; then
            dfatal "\"depmod -a $KERNEL_VER\" failed."
            exit 1
    fi
}

install_depmod_files() {
    inst /lib/modules/$KERNEL_VER/modules.order
    inst /lib/modules/$KERNEL_VER/modules.builtin
}

install_plymouth() {
    # install plymouth, if found... else remove plymouth service files
    # if [ -x /usr/libexec/plymouth/plymouth-populate-initrd ]; then
    #     PLYMOUTH_POPULATE_SOURCE_FUNCTIONS="$TEST_BASE_DIR/test-functions" \
    #         /usr/libexec/plymouth/plymouth-populate-initrd -t $initdir
    #         dracut_install plymouth plymouthd
    # else
        rm -f $initdir/{usr/lib,etc}/systemd/system/plymouth* $initdir/{usr/lib,etc}/systemd/system/*/plymouth*
    # fi
}

install_ld_so_conf() {
    cp -a /etc/ld.so.conf* $initdir/etc
    ldconfig -r "$initdir"
}

install_config_files() {
    inst /etc/sysconfig/init
    inst /etc/passwd
    inst /etc/shadow
    inst /etc/group
    inst /etc/shells
    inst /etc/nsswitch.conf
    inst /etc/pam.conf
    inst /etc/securetty
    inst /etc/os-release
    inst /etc/localtime
    # we want an empty environment
    > $initdir/etc/environment
    > $initdir/etc/machine-id
    # set the hostname
    echo systemd-testsuite > $initdir/etc/hostname
    # fstab
    cat >$initdir/etc/fstab <<EOF
LABEL=systemd           /       ext3    rw 0 1
EOF
}

install_basic_tools() {
    [[ $BASICTOOLS ]] && dracut_install $BASICTOOLS
    dracut_install -o sushell
    # in Debian ldconfig is just a shell script wrapper around ldconfig.real
    dracut_install -o ldconfig.real
}

install_debug_tools() {
    [[ $DEBUGTOOLS ]] && dracut_install $DEBUGTOOLS
}

install_libnss() {
    # install libnss_files for login
    NSS_LIBS=$(LD_DEBUG=files getent passwd 2>&1 >/dev/null |sed -n '/calling init: .*libnss_/ {s!^.* /!/!; p}')
    dracut_install $NSS_LIBS
}

install_dbus() {
    inst $ROOTLIBDIR/system/dbus.socket
    inst $ROOTLIBDIR/system/dbus.service

    find \
        /etc/dbus-1 -xtype f \
        | while read file; do
        inst $file
    done
}

install_pam() {
    find \
        /etc/pam.d \
        /etc/security \
        /lib64/security \
        /lib/security -xtype f \
        | while read file; do
        inst $file
    done
}

install_keymaps() {
    for i in \
        /usr/lib/kbd/keymaps/include/* \
        /usr/lib/kbd/keymaps/i386/include/* \
        /usr/lib/kbd/keymaps/i386/qwerty/us.*; do
            [[ -f $i ]] || continue
            inst $i
    done
}

install_fonts() {
    for i in \
        /usr/lib/kbd/consolefonts/eurlatgr* \
        /usr/lib/kbd/consolefonts/latarcyrheb-sun16*; do
            [[ -f $i ]] || continue
            inst $i
    done
}

install_terminfo() {
    for _terminfodir in /lib/terminfo /etc/terminfo /usr/share/terminfo; do
        [ -f ${_terminfodir}/l/linux ] && break
    done
    dracut_install -o ${_terminfodir}/l/linux
}

setup_testsuite() {
    cp $TEST_BASE_DIR/testsuite.target $initdir/etc/systemd/system/
    sed "s#@SYSTEMCTL@#$(type -P systemctl)#g" $TEST_BASE_DIR/end.service.in > $initdir/etc/systemd/system/end.service

    mkdir -p $initdir/etc/systemd/system/testsuite.target.wants
    ln -fs $TEST_BASE_DIR/testsuite.service $initdir/etc/systemd/system/testsuite.target.wants/testsuite.service
    ln -fs $TEST_BASE_DIR/end.service $initdir/etc/systemd/system/testsuite.target.wants/end.service

    # make the testsuite the default target
    ln -fs testsuite.target $initdir/etc/systemd/system/default.target
}

setup_nspawn_root() {
    rm -fr $TESTDIR/nspawn-root
    ddebug "cp -ar $initdir $TESTDIR/nspawn-root"
    cp -ar $initdir $TESTDIR/nspawn-root
    # we don't mount in the nspawn root
    rm -f $TESTDIR/nspawn-root/etc/fstab
}

setup_basic_dirs() {
    mkdir -p $initdir/run
    mkdir -p $initdir/etc/systemd/system
    mkdir -p $initdir/var/log/journal

    for d in usr/bin usr/sbin bin etc lib "$libdir" sbin tmp usr var var/log dev proc sys sysroot root run run/lock run/initramfs; do
        if [ -L "/$d" ]; then
            inst_symlink "/$d"
        else
            inst_dir "/$d"
        fi
    done

    ln -sfn /run "$initdir/var/run"
    ln -sfn /run/lock "$initdir/var/lock"
}

inst_libs() {
    local _bin=$1
    local _so_regex='([^ ]*/lib[^/]*/[^ ]*\.so[^ ]*)'
    local _file _line

    LC_ALL=C ldd "$_bin" 2>/dev/null | while read _line; do
        [[ $_line = 'not a dynamic executable' ]] && break

        if [[ $_line =~ $_so_regex ]]; then
            _file=${BASH_REMATCH[1]}
            [[ -e ${initdir}/$_file ]] && continue
            inst_library "$_file"
            continue
        fi

        if [[ $_line =~ not\ found ]]; then
            dfatal "Missing a shared library required by $_bin."
            dfatal "Run \"ldd $_bin\" to find out what it is."
            dfatal "$_line"
            dfatal "dracut cannot create an initrd."
            exit 1
        fi
    done
}

import_testdir() {
    STATEFILE=".testdir"
    [[ -e $STATEFILE ]] && . $STATEFILE
    if [[ -z "$TESTDIR" ]] || [[ ! -d "$TESTDIR" ]]; then
        TESTDIR=$(mktemp --tmpdir=/var/tmp -d -t systemd-test.XXXXXX)
        echo "TESTDIR=\"$TESTDIR\"" > $STATEFILE
        export TESTDIR
    fi
}

import_initdir() {
    initdir=$TESTDIR/root
    export initdir
}

## @brief Converts numeric logging level to the first letter of level name.
#
# @param lvl Numeric logging level in range from 1 to 6.
# @retval 1 if @a lvl is out of range.
# @retval 0 if @a lvl is correct.
# @result Echoes first letter of level name.
_lvl2char() {
    case "$1" in
        1) echo F;;
        2) echo E;;
        3) echo W;;
        4) echo I;;
        5) echo D;;
        6) echo T;;
        *) return 1;;
    esac
}

## @brief Internal helper function for _do_dlog()
#
# @param lvl Numeric logging level.
# @param msg Message.
# @retval 0 It's always returned, even if logging failed.
#
# @note This function is not supposed to be called manually. Please use
# dtrace(), ddebug(), or others instead which wrap this one.
#
# This function calls _do_dlog() either with parameter msg, or if
# none is given, it will read standard input and will use every line as
# a message.
#
# This enables:
# dwarn "This is a warning"
# echo "This is a warning" | dwarn
LOG_LEVEL=4

dlog() {
    [ -z "$LOG_LEVEL" ] && return 0
    [ $1 -le $LOG_LEVEL ] || return 0
    local lvl="$1"; shift
    local lvlc=$(_lvl2char "$lvl") || return 0

    if [ $# -ge 1 ]; then
        echo "$lvlc: $*"
    else
        while read line; do
            echo "$lvlc: " "$line"
        done
    fi
}

## @brief Logs message at TRACE level (6)
#
# @param msg Message.
# @retval 0 It's always returned, even if logging failed.
dtrace() {
    set +x
    dlog 6 "$@"
    [ -n "$debug" ] && set -x || :
}

## @brief Logs message at DEBUG level (5)
#
# @param msg Message.
# @retval 0 It's always returned, even if logging failed.
ddebug() {
#    set +x
    dlog 5 "$@"
#    [ -n "$debug" ] && set -x || :
}

## @brief Logs message at INFO level (4)
#
# @param msg Message.
# @retval 0 It's always returned, even if logging failed.
dinfo() {
    set +x
    dlog 4 "$@"
    [ -n "$debug" ] && set -x || :
}

## @brief Logs message at WARN level (3)
#
# @param msg Message.
# @retval 0 It's always returned, even if logging failed.
dwarn() {
    set +x
    dlog 3 "$@"
    [ -n "$debug" ] && set -x || :
}

## @brief Logs message at ERROR level (2)
#
# @param msg Message.
# @retval 0 It's always returned, even if logging failed.
derror() {
#    set +x
    dlog 2 "$@"
#    [ -n "$debug" ] && set -x || :
}

## @brief Logs message at FATAL level (1)
#
# @param msg Message.
# @retval 0 It's always returned, even if logging failed.
dfatal() {
    set +x
    dlog 1 "$@"
    [ -n "$debug" ] && set -x || :
}


# Generic substring function.  If $2 is in $1, return 0.
strstr() { [ "${1#*$2*}" != "$1" ]; }

# normalize_path <path>
# Prints the normalized path, where it removes any duplicated
# and trailing slashes.
# Example:
# $ normalize_path ///test/test//
# /test/test
normalize_path() {
    shopt -q -s extglob
    set -- "${1//+(\/)//}"
    shopt -q -u extglob
    echo "${1%/}"
}

# convert_abs_rel <from> <to>
# Prints the relative path, when creating a symlink to <to> from <from>.
# Example:
# $ convert_abs_rel /usr/bin/test /bin/test-2
# ../../bin/test-2
# $ ln -s $(convert_abs_rel /usr/bin/test /bin/test-2) /usr/bin/test
convert_abs_rel() {
    local __current __absolute __abssize __cursize __newpath
    local -i __i __level

    set -- "$(normalize_path "$1")" "$(normalize_path "$2")"

    # corner case #1 - self looping link
    [[ "$1" == "$2" ]] && { echo "${1##*/}"; return; }

    # corner case #2 - own dir link
    [[ "${1%/*}" == "$2" ]] && { echo "."; return; }

    IFS="/" __current=($1)
    IFS="/" __absolute=($2)

    __abssize=${#__absolute[@]}
    __cursize=${#__current[@]}

    while [[ ${__absolute[__level]} == ${__current[__level]} ]]
    do
        (( __level++ ))
        if (( __level > __abssize || __level > __cursize ))
        then
            break
        fi
    done

    for ((__i = __level; __i < __cursize-1; __i++))
    do
        if ((__i > __level))
        then
            __newpath=$__newpath"/"
        fi
        __newpath=$__newpath".."
    done

    for ((__i = __level; __i < __abssize; __i++))
    do
        if [[ -n $__newpath ]]
        then
            __newpath=$__newpath"/"
        fi
        __newpath=$__newpath${__absolute[__i]}
    done

    echo "$__newpath"
}


# Install a directory, keeping symlinks as on the original system.
# Example: if /lib points to /lib64 on the host, "inst_dir /lib/file"
# will create ${initdir}/lib64, ${initdir}/lib64/file,
# and a symlink ${initdir}/lib -> lib64.
inst_dir() {
    [[ -e ${initdir}/"$1" ]] && return 0  # already there

    local _dir="$1" _part="${1%/*}" _file
    while [[ "$_part" != "${_part%/*}" ]] && ! [[ -e "${initdir}/${_part}" ]]; do
        _dir="$_part $_dir"
        _part=${_part%/*}
    done

    # iterate over parent directories
    for _file in $_dir; do
        [[ -e "${initdir}/$_file" ]] && continue
        if [[ -L $_file ]]; then
            inst_symlink "$_file"
        else
            # create directory
            mkdir -m 0755 -p "${initdir}/$_file" || return 1
            [[ -e "$_file" ]] && chmod --reference="$_file" "${initdir}/$_file"
            chmod u+w "${initdir}/$_file"
        fi
    done
}

# $1 = file to copy to ramdisk
# $2 (optional) Name for the file on the ramdisk
# Location of the image dir is assumed to be $initdir
# We never overwrite the target if it exists.
inst_simple() {
    [[ -f "$1" ]] || return 1
    strstr "$1" "/" || return 1

    local _src=$1 target="${2:-$1}"
    if ! [[ -d ${initdir}/$target ]]; then
        [[ -e ${initdir}/$target ]] && return 0
        [[ -L ${initdir}/$target ]] && return 0
        [[ -d "${initdir}/${target%/*}" ]] || inst_dir "${target%/*}"
    fi
    # install checksum files also
    if [[ -e "${_src%/*}/.${_src##*/}.hmac" ]]; then
        inst "${_src%/*}/.${_src##*/}.hmac" "${target%/*}/.${target##*/}.hmac"
    fi
    ddebug "Installing $_src"
    cp --sparse=always -pfL "$_src" "${initdir}/$target"
}

# find symlinks linked to given library file
# $1 = library file
# Function searches for symlinks by stripping version numbers appended to
# library filename, checks if it points to the same target and finally
# prints the list of symlinks to stdout.
#
# Example:
# rev_lib_symlinks libfoo.so.8.1
# output: libfoo.so.8 libfoo.so
# (Only if libfoo.so.8 and libfoo.so exists on host system.)
rev_lib_symlinks() {
    [[ ! $1 ]] && return 0

    local fn="$1" orig="$(readlink -f "$1")" links=''

    [[ ${fn} =~ .*\.so\..* ]] || return 1

    until [[ ${fn##*.} == so ]]; do
        fn="${fn%.*}"
        [[ -L ${fn} && $(readlink -f "${fn}") == ${orig} ]] && links+=" ${fn}"
    done

    echo "${links}"
}

# Same as above, but specialized to handle dynamic libraries.
# It handles making symlinks according to how the original library
# is referenced.
inst_library() {
    local _src="$1" _dest=${2:-$1} _lib _reallib _symlink
    strstr "$1" "/" || return 1
    [[ -e $initdir/$_dest ]] && return 0
    if [[ -L $_src ]]; then
        # install checksum files also
        if [[ -e "${_src%/*}/.${_src##*/}.hmac" ]]; then
            inst "${_src%/*}/.${_src##*/}.hmac" "${_dest%/*}/.${_dest##*/}.hmac"
        fi
        _reallib=$(readlink -f "$_src")
        inst_simple "$_reallib" "$_reallib"
        inst_dir "${_dest%/*}"
        [[ -d "${_dest%/*}" ]] && _dest=$(readlink -f "${_dest%/*}")/${_dest##*/}
        ln -sfn $(convert_abs_rel "${_dest}" "${_reallib}") "${initdir}/${_dest}"
    else
        inst_simple "$_src" "$_dest"
    fi

    # Create additional symlinks.  See rev_symlinks description.
    for _symlink in $(rev_lib_symlinks $_src) $(rev_lib_symlinks $_reallib); do
        [[ ! -e $initdir/$_symlink ]] && {
            ddebug "Creating extra symlink: $_symlink"
            inst_symlink $_symlink
        }
    done
}

# find a binary.  If we were not passed the full path directly,
# search in the usual places to find the binary.
find_binary() {
    if [[ -z ${1##/*} ]]; then
        if [[ -x $1 ]] || { strstr "$1" ".so" && ldd $1 &>/dev/null; };  then
            echo $1
            return 0
        fi
    fi

    type -P $1
}

# Same as above, but specialized to install binary executables.
# Install binary executable, and all shared library dependencies, if any.
inst_binary() {
    local _bin _target
    _bin=$(find_binary "$1") || return 1
    _target=${2:-$_bin}
    [[ -e $initdir/$_target ]] && return 0
    [[ -L $_bin ]] && inst_symlink $_bin $_target && return 0
    local _file _line
    local _so_regex='([^ ]*/lib[^/]*/[^ ]*\.so[^ ]*)'
    # I love bash!
    LC_ALL=C ldd "$_bin" 2>/dev/null | while read _line; do
        [[ $_line = 'not a dynamic executable' ]] && break

        if [[ $_line =~ $_so_regex ]]; then
            _file=${BASH_REMATCH[1]}
            [[ -e ${initdir}/$_file ]] && continue
            inst_library "$_file"
            continue
        fi

        if [[ $_line =~ not\ found ]]; then
            dfatal "Missing a shared library required by $_bin."
            dfatal "Run \"ldd $_bin\" to find out what it is."
            dfatal "$_line"
            dfatal "dracut cannot create an initrd."
            exit 1
        fi
    done
    inst_simple "$_bin" "$_target"
}

# same as above, except for shell scripts.
# If your shell script does not start with shebang, it is not a shell script.
inst_script() {
    local _bin
    _bin=$(find_binary "$1") || return 1
    shift
    local _line _shebang_regex
    read -r -n 80 _line <"$_bin"
    # If debug is set, clean unprintable chars to prevent messing up the term
    [[ $debug ]] && _line=$(echo -n "$_line" | tr -c -d '[:print:][:space:]')
    _shebang_regex='(#! *)(/[^ ]+).*'
    [[ $_line =~ $_shebang_regex ]] || return 1
    inst "${BASH_REMATCH[2]}" && inst_simple "$_bin" "$@"
}

# same as above, but specialized for symlinks
inst_symlink() {
    local _src=$1 _target=${2:-$1} _realsrc
    strstr "$1" "/" || return 1
    [[ -L $1 ]] || return 1
    [[ -L $initdir/$_target ]] && return 0
    _realsrc=$(readlink -f "$_src")
    if ! [[ -e $initdir/$_realsrc ]]; then
        if [[ -d $_realsrc ]]; then
            inst_dir "$_realsrc"
        else
            inst "$_realsrc"
        fi
    fi
    [[ ! -e $initdir/${_target%/*} ]] && inst_dir "${_target%/*}"
    [[ -d ${_target%/*} ]] && _target=$(readlink -f ${_target%/*})/${_target##*/}
    ln -sfn $(convert_abs_rel "${_target}" "${_realsrc}") "$initdir/$_target"
}

# attempt to install any programs specified in a udev rule
inst_rule_programs() {
    local _prog _bin

    if grep -qE 'PROGRAM==?"[^ "]+' "$1"; then
        for _prog in $(grep -E 'PROGRAM==?"[^ "]+' "$1" | sed -r 's/.*PROGRAM==?"([^ "]+).*/\1/'); do
            if [ -x /lib/udev/$_prog ]; then
                _bin=/lib/udev/$_prog
            else
                _bin=$(find_binary "$_prog") || {
                    dinfo "Skipping program $_prog using in udev rule $(basename $1) as it cannot be found"
                    continue;
                }
            fi

            #dinfo "Installing $_bin due to it's use in the udev rule $(basename $1)"
            dracut_install "$_bin"
        done
    fi
}

# udev rules always get installed in the same place, so
# create a function to install them to make life simpler.
inst_rules() {
    local _target=/etc/udev/rules.d _rule _found

    inst_dir "/lib/udev/rules.d"
    inst_dir "$_target"
    for _rule in "$@"; do
        if [ "${rule#/}" = "$rule" ]; then
            for r in /lib/udev/rules.d /etc/udev/rules.d; do
                if [[ -f $r/$_rule ]]; then
                    _found="$r/$_rule"
                    inst_simple "$_found"
                    inst_rule_programs "$_found"
                fi
            done
        fi
        for r in '' ./ $dracutbasedir/rules.d/; do
            if [[ -f ${r}$_rule ]]; then
                _found="${r}$_rule"
                inst_simple "$_found" "$_target/${_found##*/}"
                inst_rule_programs "$_found"
            fi
        done
        [[ $_found ]] || dinfo "Skipping udev rule: $_rule"
    done
}

# general purpose installation function
# Same args as above.
inst() {
    local _x

    case $# in
        1) ;;
        2) [[ ! $initdir && -d $2 ]] && export initdir=$2
            [[ $initdir = $2 ]] && set $1;;
        3) [[ -z $initdir ]] && export initdir=$2
            set $1 $3;;
        *) dfatal "inst only takes 1 or 2 or 3 arguments"
            exit 1;;
    esac
    for _x in inst_symlink inst_script inst_binary inst_simple; do
        $_x "$@" && return 0
    done
    return 1
}

# install any of listed files
#
# If first argument is '-d' and second some destination path, first accessible
# source is installed into this path, otherwise it will installed in the same
# path as source.  If none of listed files was installed, function return 1.
# On first successful installation it returns with 0 status.
#
# Example:
#
# inst_any -d /bin/foo /bin/bar /bin/baz
#
# Lets assume that /bin/baz exists, so it will be installed as /bin/foo in
# initramfs.
inst_any() {
    local to f

    [[ $1 = '-d' ]] && to="$2" && shift 2

    for f in "$@"; do
        if [[ -e $f ]]; then
            [[ $to ]] && inst "$f" "$to" && return 0
            inst "$f" && return 0
        fi
    done

    return 1
}

# dracut_install [-o ] <file> [<file> ... ]
# Install <file> to the initramfs image
# -o optionally install the <file> and don't fail, if it is not there
dracut_install() {
    local _optional=no
    if [[ $1 = '-o' ]]; then
        _optional=yes
        shift
    fi
    while (($# > 0)); do
        if ! inst "$1" ; then
            if [[ $_optional = yes ]]; then
                dinfo "Skipping program $1 as it cannot be found and is" \
                    "flagged to be optional"
            else
                dfatal "Failed to install $1"
                exit 1
            fi
        fi
        shift
    done
}

# Install a single kernel module along with any firmware it may require.
# $1 = full path to kernel module to install
install_kmod_with_fw() {
    # no need to go further if the module is already installed

    [[ -e "${initdir}/lib/modules/$KERNEL_VER/${1##*/lib/modules/$KERNEL_VER/}" ]] \
        && return 0

    [[ -e "$initdir/.kernelmodseen/${1##*/}" ]] && return 0

    if [[ $omit_drivers ]]; then
        local _kmod=${1##*/}
        _kmod=${_kmod%.ko}
        _kmod=${_kmod/-/_}
        if [[ "$_kmod" =~ $omit_drivers ]]; then
            dinfo "Omitting driver $_kmod"
            return 1
        fi
        if [[ "${1##*/lib/modules/$KERNEL_VER/}" =~ $omit_drivers ]]; then
            dinfo "Omitting driver $_kmod"
            return 1
        fi
    fi

    [ -d "$initdir/.kernelmodseen" ] && \
        > "$initdir/.kernelmodseen/${1##*/}"

    inst_simple "$1" "/lib/modules/$KERNEL_VER/${1##*/lib/modules/$KERNEL_VER/}" \
        || return $?

    local _modname=${1##*/} _fwdir _found _fw
    _modname=${_modname%.ko*}
    for _fw in $(modinfo -k $KERNEL_VER -F firmware $1 2>/dev/null); do
        _found=''
        for _fwdir in $fw_dir; do
            if [[ -d $_fwdir && -f $_fwdir/$_fw ]]; then
                inst_simple "$_fwdir/$_fw" "/lib/firmware/$_fw"
                _found=yes
            fi
        done
        if [[ $_found != yes ]]; then
            if ! grep -qe "\<${_modname//-/_}\>" /proc/modules; then
                dinfo "Possible missing firmware \"${_fw}\" for kernel module" \
                    "\"${_modname}.ko\""
            else
                dwarn "Possible missing firmware \"${_fw}\" for kernel module" \
                    "\"${_modname}.ko\""
            fi
        fi
    done
    return 0
}

# Do something with all the dependencies of a kernel module.
# Note that kernel modules depend on themselves using the technique we use
# $1 = function to call for each dependency we find
#      It will be passed the full path to the found kernel module
# $2 = module to get dependencies for
# rest of args = arguments to modprobe
# _fderr specifies FD passed from surrounding scope
for_each_kmod_dep() {
    local _func=$1 _kmod=$2 _cmd _modpath _options _found=0
    shift 2
    modprobe "$@" --ignore-install --show-depends $_kmod 2>&${_fderr} | (
        while read _cmd _modpath _options; do
            [[ $_cmd = insmod ]] || continue
            $_func ${_modpath} || exit $?
            _found=1
        done
        [[ $_found -eq 0 ]] && exit 1
        exit 0
    )
}

# filter kernel modules to install certain modules that meet specific
# requirements.
# $1 = search only in subdirectory of /kernel/$1
# $2 = function to call with module name to filter.
#      This function will be passed the full path to the module to test.
# The behavior of this function can vary depending on whether $hostonly is set.
# If it is, we will only look at modules that are already in memory.
# If it is not, we will look at all kernel modules
# This function returns the full filenames of modules that match $1
filter_kernel_modules_by_path () (
    local _modname _filtercmd
    if ! [[ $hostonly ]]; then
        _filtercmd='find "$KERNEL_MODS/kernel/$1" "$KERNEL_MODS/extra"'
        _filtercmd+=' "$KERNEL_MODS/weak-updates" -name "*.ko" -o -name "*.ko.gz"'
        _filtercmd+=' -o -name "*.ko.xz"'
        _filtercmd+=' 2>/dev/null'
    else
        _filtercmd='cut -d " " -f 1 </proc/modules|xargs modinfo -F filename '
        _filtercmd+='-k $KERNEL_VER 2>/dev/null'
    fi
    for _modname in $(eval $_filtercmd); do
        case $_modname in
            *.ko) "$2" "$_modname" && echo "$_modname";;
            *.ko.gz) gzip -dc "$_modname" > $initdir/$$.ko
                $2 $initdir/$$.ko && echo "$_modname"
                rm -f $initdir/$$.ko
                ;;
            *.ko.xz) xz -dc "$_modname" > $initdir/$$.ko
                $2 $initdir/$$.ko && echo "$_modname"
                rm -f $initdir/$$.ko
                ;;
        esac
    done
)
find_kernel_modules_by_path () (
    if ! [[ $hostonly ]]; then
        find "$KERNEL_MODS/kernel/$1" "$KERNEL_MODS/extra" "$KERNEL_MODS/weak-updates" \
          -name "*.ko" -o -name "*.ko.gz" -o -name "*.ko.xz" 2>/dev/null
    else
        cut -d " " -f 1 </proc/modules \
        | xargs modinfo -F filename -k $KERNEL_VER 2>/dev/null
    fi
)

filter_kernel_modules () {
    filter_kernel_modules_by_path  drivers  "$1"
}

find_kernel_modules () {
    find_kernel_modules_by_path  drivers
}

# instmods [-c] <kernel module> [<kernel module> ... ]
# instmods [-c] <kernel subsystem>
# install kernel modules along with all their dependencies.
# <kernel subsystem> can be e.g. "=block" or "=drivers/usb/storage"
instmods() {
    [[ $no_kernel = yes ]] && return
    # called [sub]functions inherit _fderr
    local _fderr=9
    local _check=no
    if [[ $1 = '-c' ]]; then
        _check=yes
        shift
    fi

    function inst1mod() {
        local _ret=0 _mod="$1"
        case $_mod in
            =*)
                if [ -f $KERNEL_MODS/modules.${_mod#=} ]; then
                    ( [[ "$_mpargs" ]] && echo $_mpargs
                      cat "${KERNEL_MODS}/modules.${_mod#=}" ) \
                    | instmods
                else
                    ( [[ "$_mpargs" ]] && echo $_mpargs
                      find "$KERNEL_MODS" -path "*/${_mod#=}/*" -printf '%f\n' ) \
                    | instmods
                fi
                ;;
            --*) _mpargs+=" $_mod" ;;
            i2o_scsi) return ;; # Do not load this diagnostic-only module
            *)
                _mod=${_mod##*/}
                # if we are already installed, skip this module and go on
                # to the next one.
                [[ -f "$initdir/.kernelmodseen/${_mod%.ko}.ko" ]] && return

                if [[ $omit_drivers ]] && [[ "$1" =~ $omit_drivers ]]; then
                    dinfo "Omitting driver ${_mod##$KERNEL_MODS}"
                    return
                fi
                # If we are building a host-specific initramfs and this
                # module is not already loaded, move on to the next one.
                [[ $hostonly ]] && ! grep -qe "\<${_mod//-/_}\>" /proc/modules \
                    && ! echo $add_drivers | grep -qe "\<${_mod}\>" \
                    && return

                # We use '-d' option in modprobe only if modules prefix path
                # differs from default '/'.  This allows us to use Dracut with
                # old version of modprobe which doesn't have '-d' option.
                local _moddirname=${KERNEL_MODS%%/lib/modules/*}
                [[ -n ${_moddirname} ]] && _moddirname="-d ${_moddirname}/"

                # ok, load the module, all its dependencies, and any firmware
                # it may require
                for_each_kmod_dep install_kmod_with_fw $_mod \
                    --set-version $KERNEL_VER ${_moddirname} $_mpargs
                ((_ret+=$?))
                ;;
        esac
        return $_ret
    }

    function instmods_1() {
        local _mod _mpargs
        if (($# == 0)); then  # filenames from stdin
            while read _mod; do
                inst1mod "${_mod%.ko*}" || {
                    if [ "$_check" = "yes" ]; then
                        dfatal "Failed to install $_mod"
                        return 1
                    fi
                }
            done
        fi
        while (($# > 0)); do  # filenames as arguments
            inst1mod ${1%.ko*} || {
                if [ "$_check" = "yes" ]; then
                    dfatal "Failed to install $1"
                    return 1
                fi
            }
            shift
        done
        return 0
    }

    local _ret _filter_not_found='FATAL: Module .* not found.'
    set -o pipefail
    # Capture all stderr from modprobe to _fderr. We could use {var}>...
    # redirections, but that would make dracut require bash4 at least.
    eval "( instmods_1 \"\$@\" ) ${_fderr}>&1" \
    | while read line; do [[ "$line" =~ $_filter_not_found ]] && echo $line || echo $line >&2 ;done | derror
    _ret=$?
    set +o pipefail
    return $_ret
}

# inst_libdir_file [-n <pattern>] <file> [<file>...]
# Install a <file> located on a lib directory to the initramfs image
# -n <pattern> install non-matching files
inst_libdir_file() {
    if [[ "$1" == "-n" ]]; then
        local _pattern=$1
        shift 2
        for _dir in $libdirs; do
            for _i in "$@"; do
                for _f in "$_dir"/$_i; do
                    [[ "$_i" =~ $_pattern ]] || continue
                    [[ -e "$_i" ]] && dracut_install "$_i"
                done
            done
        done
    else
        for _dir in $libdirs; do
            for _i in "$@"; do
                for _f in "$_dir"/$_i; do
                    [[ -e "$_f" ]] && dracut_install "$_f"
                done
            done
        done
    fi
}

check_nspawn() {
    [[ -d /sys/fs/cgroup/systemd ]]
}


do_test() {
    if [[ $UID != "0" ]]; then
        echo "TEST: $TEST_DESCRIPTION [SKIPPED]: not root" >&2
        exit 0
    fi

# Detect lib paths
    [[ $libdir ]] || for libdir in /lib64 /lib; do
        [[ -d $libdir ]] && libdirs+=" $libdir" && break
    done

    [[ $usrlibdir ]] || for usrlibdir in /usr/lib64 /usr/lib; do
        [[ -d $usrlibdir ]] && libdirs+=" $usrlibdir" && break
    done

    import_testdir
    import_initdir

    while (($# > 0)); do
        case $1 in
            --run)
                echo "TEST RUN: $TEST_DESCRIPTION"
                test_run
                ret=$?
                if [ $ret -eq 0 ]; then
                    echo "TEST RUN: $TEST_DESCRIPTION [OK]"
                else
                    echo "TEST RUN: $TEST_DESCRIPTION [FAILED]"
                fi
                exit $ret;;
            --setup)
                echo "TEST SETUP: $TEST_DESCRIPTION"
                test_setup
                exit $?;;
            --clean)
                echo "TEST CLEANUP: $TEST_DESCRIPTION"
                test_cleanup
                rm -fr "$TESTDIR"
                rm -f .testdir
                exit $?;;
            --all)
                echo -n "TEST: $TEST_DESCRIPTION ";
                (
                    test_setup && test_run
                    ret=$?
                    test_cleanup
                    rm -fr "$TESTDIR"
                    rm -f .testdir
                    exit $ret
                ) </dev/null >test.log 2>&1
                ret=$?
                if [ $ret -eq 0 ]; then
                    rm test.log
                    echo "[OK]"
                else
                    echo "[FAILED]"
                    echo "see $(pwd)/test.log"
                fi
                exit $ret;;
            *) break ;;
        esac
        shift
    done
}