summaryrefslogtreecommitdiffstats
path: root/packaging/installer/functions.sh
blob: ebb4aab75a8b1d35773bf1d19c11d2d4d533347f (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
#!/bin/sh

# SPDX-License-Identifier: GPL-3.0-or-later

# next unused error code: L0003

# make sure we have a UID
[ -z "${UID}" ] && UID="$(id -u)"
# -----------------------------------------------------------------------------

setup_terminal() {
  TPUT_RESET=""
  TPUT_BLACK=""
  TPUT_RED=""
  TPUT_GREEN=""
  TPUT_YELLOW=""
  TPUT_BLUE=""
  TPUT_PURPLE=""
  TPUT_CYAN=""
  TPUT_WHITE=""
  TPUT_BGBLACK=""
  TPUT_BGRED=""
  TPUT_BGGREEN=""
  TPUT_BGYELLOW=""
  TPUT_BGBLUE=""
  TPUT_BGPURPLE=""
  TPUT_BGCYAN=""
  TPUT_BGWHITE=""
  TPUT_BOLD=""
  TPUT_DIM=""
  TPUT_UNDERLINED=""
  TPUT_BLINK=""
  TPUT_INVERTED=""
  TPUT_STANDOUT=""
  TPUT_BELL=""
  TPUT_CLEAR=""

  # Is stderr on the terminal? If not, then fail
  test -t 2 || return 1

  if command -v tput 1> /dev/null 2>&1; then
    if [ $(($(tput colors 2> /dev/null))) -ge 8 ]; then
      # Enable colors
      TPUT_RESET="$(tput sgr 0)"
      # shellcheck disable=SC2034
      TPUT_BLACK="$(tput setaf 0)"
      # shellcheck disable=SC2034
      TPUT_RED="$(tput setaf 1)"
      TPUT_GREEN="$(tput setaf 2)"
      # shellcheck disable=SC2034
      TPUT_YELLOW="$(tput setaf 3)"
      # shellcheck disable=SC2034
      TPUT_BLUE="$(tput setaf 4)"
      # shellcheck disable=SC2034
      TPUT_PURPLE="$(tput setaf 5)"
      # shellcheck disable=SC2034
      TPUT_CYAN="$(tput setaf 6)"
      TPUT_WHITE="$(tput setaf 7)"
      # shellcheck disable=SC2034
      TPUT_BGBLACK="$(tput setab 0)"
      TPUT_BGRED="$(tput setab 1)"
      TPUT_BGGREEN="$(tput setab 2)"
      # shellcheck disable=SC2034
      TPUT_BGYELLOW="$(tput setab 3)"
      # shellcheck disable=SC2034
      TPUT_BGBLUE="$(tput setab 4)"
      # shellcheck disable=SC2034
      TPUT_BGPURPLE="$(tput setab 5)"
      # shellcheck disable=SC2034
      TPUT_BGCYAN="$(tput setab 6)"
      # shellcheck disable=SC2034
      TPUT_BGWHITE="$(tput setab 7)"
      TPUT_BOLD="$(tput bold)"
      TPUT_DIM="$(tput dim)"
      # shellcheck disable=SC2034
      TPUT_UNDERLINED="$(tput smul)"
      # shellcheck disable=SC2034
      TPUT_BLINK="$(tput blink)"
      # shellcheck disable=SC2034
      TPUT_INVERTED="$(tput rev)"
      # shellcheck disable=SC2034
      TPUT_STANDOUT="$(tput smso)"
      # shellcheck disable=SC2034
      TPUT_BELL="$(tput bel)"
      # shellcheck disable=SC2034
      TPUT_CLEAR="$(tput clear)"
    fi
  fi

  return 0
}
setup_terminal || echo > /dev/null

progress() {
  echo >&2 " --- ${TPUT_DIM}${TPUT_BOLD}${*}${TPUT_RESET} --- "
}

get() {
  url="${1}"
  if command -v curl > /dev/null 2>&1; then
    curl -q -o - -sSL --connect-timeout 10 --retry 3 "${url}"
  elif command -v wget > /dev/null 2>&1; then
    wget -T 15 -O - "${url}"
  else
    fatal "I need curl or wget to proceed, but neither is available on this system." "L0002"
  fi
}

download_file() {
  url="${1}"
  dest="${2}"
  name="${3}"
  opt="${4}"

  if command -v curl > /dev/null 2>&1; then
    run curl -q -sSL --connect-timeout 10 --retry 3 --output "${dest}" "${url}"
  elif command -v wget > /dev/null 2>&1; then
    run wget -T 15 -O "${dest}" "${url}"
  else
    echo >&2
    echo >&2 "Downloading ${name} from '${url}' failed because of missing mandatory packages."
    if [ -n "$opt" ]; then
      echo >&2 "Either add packages or disable it by issuing '--disable-${opt}' in the installer"
    fi
    echo >&2

    run_failed "I need curl or wget to proceed, but neither is available on this system."
  fi
}

# -----------------------------------------------------------------------------
# external component handling

fetch_and_verify() {
  component="${1}"
  url="${2}"
  base_name="${3}"
  tmp="${4}"
  override="${5}"

  if [ -z "${override}" ]; then
    download_file "${url}" "${tmp}/${base_name}" "${component}"
  else
    progress "Using provided ${component} archive ${override}"
    run cp "${override}" "${tmp}/${base_name}"
  fi

  if [ ! -f "${tmp}/${base_name}" ] || [ ! -s "${tmp}/${base_name}" ]; then
    run_failed "Unable to find usable archive for ${component}"
    return 1
  fi

  grep "${base_name}\$" "${INSTALLER_DIR}/packaging/${component}.checksums" > "${tmp}/sha256sums.txt" 2> /dev/null

  # Checksum validation
  if ! (cd "${tmp}" && safe_sha256sum -c "sha256sums.txt"); then
    run_failed "${component} files checksum validation failed."
    return 1
  fi
}

# -----------------------------------------------------------------------------

netdata_banner() {
    l1="  ^" \
    l2="  |.-.   .-.   .-.   .-.   .-.   .-.   .-.   .-.   .-.   .-.   .-.   .-.   .-" \
    l4="  +----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+--->" \
    space="  "
    l3f="  |   '-'   '-'   '-'   '-'   '-'"
    l3e="               '-'   '-'   '-'   '-'   '-'   "

    netdata="netdata"
    chartcolor="${TPUT_DIM}"

  echo >&2
  echo >&2 "${chartcolor}${l1}${TPUT_RESET}"
  echo >&2 "${chartcolor}${l2%-.   .-.   .-.   .-.   .-.   .-.   .-.   .-}${space}${TPUT_RESET}${TPUT_BOLD}${TPUT_GREEN}${netdata}${TPUT_RESET}${chartcolor}${l2#  |.-.   .-.   .-.   .-.   .-.   .-.   .-. }${TPUT_RESET}"
  echo >&2 "${chartcolor}${l3f}${l3e}${TPUT_RESET}"
  echo >&2 "${chartcolor}${l4}${TPUT_RESET}"
  echo >&2
}

# -----------------------------------------------------------------------------
# portable service command

service_cmd="$(command -v service 2> /dev/null || true)"
rcservice_cmd="$(command -v rc-service 2> /dev/null || true)"
systemctl_cmd="$(command -v systemctl 2> /dev/null || true)"
service() {

  cmd="${1}"
  action="${2}"

  if [ -n "${systemctl_cmd}" ]; then
    run "${systemctl_cmd}" "${action}" "${cmd}"
    return $?
  elif [ -n "${service_cmd}" ]; then
    run "${service_cmd}" "${cmd}" "${action}"
    return $?
  elif [ -n "${rcservice_cmd}" ]; then
    run "${rcservice_cmd}" "${cmd}" "${action}"
    return $?
  fi
  return 1
}

# -----------------------------------------------------------------------------
# portable pidof

safe_pidof() {
  pidof_cmd="$(command -v pidof 2> /dev/null)"
  if [ -n "${pidof_cmd}" ]; then
    ${pidof_cmd} "${@}"
    return $?
  else
    ps -acxo pid,comm |
      sed "s/^ *//g" |
      grep netdata |
      cut -d ' ' -f 1
    return $?
  fi
}

# -----------------------------------------------------------------------------
find_processors() {
  # Most UNIX systems have `nproc` as part of their userland (including Linux and BSD)
  if command -v nproc > /dev/null; then
    nproc && return
  fi

  # macOS has no nproc but it may have gnproc installed from Homebrew or from Macports.
  if command -v gnproc > /dev/null; then
    gnproc && return
  fi

  if [ -f "/proc/cpuinfo" ]; then
    # linux
    cpus=$(grep -c ^processor /proc/cpuinfo)
  else
  # freebsd
    cpus=$(sysctl hw.ncpu 2> /dev/null | grep ^hw.ncpu | cut -d ' ' -f 2)
  fi
  if [ -z "${cpus}" ] || [ $((cpus)) -lt 1 ]; then
    echo 1
  else
    echo "${cpus}"
  fi
}

# -----------------------------------------------------------------------------
exit_reason() {
  if [ -n "${NETDATA_SAVE_WARNINGS}" ]; then
    EXIT_REASON="${1}"
    EXIT_CODE="${2}"
    if [ -n "${NETDATA_PROPAGATE_WARNINGS}" ]; then
      if [ -n "${NETDATA_SCRIPT_STATUS_PATH}" ]; then
        {
          echo "EXIT_REASON=\"${EXIT_REASON}\""
          echo "EXIT_CODE=\"${EXIT_CODE}\""
          echo "NETDATA_WARNINGS=\"${NETDATA_WARNINGS}${SAVED_WARNINGS}\""
        } >> "${NETDATA_SCRIPT_STATUS_PATH}"
      else
        export EXIT_REASON
        export EXIT_CODE
        export NETDATA_WARNINGS="${NETDATA_WARNINGS}${SAVED_WARNINGS}"
      fi
    fi
  fi
}

fatal() {
  printf >&2 "%s ABORTED %s %s \n\n" "${TPUT_BGRED}${TPUT_WHITE}${TPUT_BOLD}" "${TPUT_RESET}" "${1}"
  if [ -n "${NETDATA_SAVE_WARNINGS}" ]; then
    SAVED_WARNINGS="${SAVED_WARNINGS}\n  - ${1}"
  fi
  exit_reason "${1}" "${2}"
  exit 1
}

warning() {
  printf >&2 "%s WARNING %s %s\n\n" "${TPUT_BGYELLOW}${TPUT_BLACK}${TPUT_BOLD}" "${TPUT_RESET}" "${1}"
  if [ -n "${NETDATA_SAVE_WARNINGS}" ]; then
    SAVED_WARNINGS="${SAVED_WARNINGS}\n  - ${1}"
  fi
}

run_ok() {
  printf >&2 "%s OK %s %s\n\n" "${TPUT_BGGREEN}${TPUT_WHITE}${TPUT_BOLD}" "${TPUT_RESET}" "${1:-''}"
}

run_failed() {
  printf >&2 "%s FAILED %s %s\n\n" "${TPUT_BGRED}${TPUT_WHITE}${TPUT_BOLD}" "${TPUT_RESET}" "${1:-''}"
  if [ -n "${NETDATA_SAVE_WARNINGS}" ] && [ -n "${1:-''}" ]; then
    SAVED_WARNINGS="${SAVED_WARNINGS}\n  - ${1}"
  fi
}

ESCAPED_PRINT_METHOD=
if printf "%s " test > /dev/null 2>&1; then
  ESCAPED_PRINT_METHOD="printfq"
fi
escaped_print() {
  if [ "${ESCAPED_PRINT_METHOD}" = "printfq" ]; then
    printf "%s " "${@}"
  else
    printf "%s" "${*}"
  fi
  return 0
}

run_logfile="/dev/null"
run() {
  local_user="${USER--}"
  local_dir="${PWD}"
  if [ "${UID}" = "0" ]; then
    info="[root ${local_dir}]# "
    info_console="[${TPUT_DIM}${local_dir}${TPUT_RESET}]# "
  else
    info="[${local_user} ${local_dir}]$ "
    info_console="[${TPUT_DIM}${local_dir}${TPUT_RESET}]$ "
  fi

  {
    printf "%s" "${info}"
    escaped_print "${@}"
    printf "%s" " ... "
  } >> "${run_logfile}"

  printf >&2 "%s" "${info_console}${TPUT_BOLD}${TPUT_YELLOW}"
  escaped_print >&2 "${@}"
  printf >&2 "%s\n" "${TPUT_RESET}"

  "${@}"

  ret=$?
  if [ ${ret} -ne 0 ]; then
    run_failed
    printf >> "${run_logfile}" "FAILED with exit code %s\n" "${ret}"
    if [ -n "${NETDATA_SAVE_WARNINGS}" ]; then
      SAVED_WARNINGS="${SAVED_WARNINGS}\n  - Command '${*}' failed with exit code ${ret}."
    fi
  else
    run_ok
    printf >> "${run_logfile}" "OK\n"
  fi

  return ${ret}
}

iscontainer() {
  # man systemd-detect-virt
  cmd=$(command -v systemd-detect-virt 2> /dev/null)
  if [ -n "${cmd}" ] && [ -x "${cmd}" ]; then
    "${cmd}" --container > /dev/null 2>&1 && return 0
  fi

  # /proc/1/sched exposes the host's pid of our init !
  # http://stackoverflow.com/a/37016302
  pid=$(head -n 1 /proc/1/sched 2> /dev/null | {
    # shellcheck disable=SC2034
    IFS='(),#:' read -r name pid th threads
    echo "$pid"
  })
  if [ -n "${pid}" ]; then
    pid=$((pid + 0))
    [ ${pid} -gt 1 ] && return 0
  fi

  # lxc sets environment variable 'container'
  # shellcheck disable=SC2154
  [ -n "${container}" ] && return 0

  # docker creates /.dockerenv
  # http://stackoverflow.com/a/25518345
  [ -f "/.dockerenv" ] && return 0

  # ubuntu and debian supply /bin/running-in-container
  # https://www.apt-browse.org/browse/ubuntu/trusty/main/i386/upstart/1.12.1-0ubuntu4/file/bin/running-in-container
  if [ -x "/bin/running-in-container" ]; then
    "/bin/running-in-container" > /dev/null 2>&1 && return 0
  fi

  return 1
}

get_os_key() {
  if [ -f /etc/os-release ]; then
    # shellcheck disable=SC1091
    . /etc/os-release || return 1
    echo "${ID}-${VERSION_ID}"

  elif [ -f /etc/redhat-release ]; then
    cat /etc/redhat-release
  else
    echo "unknown"
  fi
}

get_group(){
  if command -v getent > /dev/null 2>&1; then
    getent group "${1:-""}"
  else
    cat /etc/group | grep "^${1}:" 
  fi
}

issystemd() {
  pids=''
  p=''
  myns=''
  ns=''
  systemctl=''

  # if the directory /lib/systemd/system OR /usr/lib/systemd/system (SLES 12.x) does not exit, it is not systemd
  if [ ! -d /lib/systemd/system ] && [ ! -d /usr/lib/systemd/system ]; then
    return 1
  fi

  # if there is no systemctl command, it is not systemd
  systemctl=$(command -v systemctl 2> /dev/null)
  if [ -z "${systemctl}" ] || [ ! -x "${systemctl}" ]; then
    return 1
  fi

  # if pid 1 is systemd, it is systemd
  [ "$(basename "$(readlink /proc/1/exe)" 2> /dev/null)" = "systemd" ] && return 0

  # if systemd is not running, it is not systemd
  pids=$(safe_pidof systemd 2> /dev/null)
  [ -z "${pids}" ] && return 1

  # check if the running systemd processes are not in our namespace
  myns="$(readlink /proc/self/ns/pid 2> /dev/null)"
  for p in ${pids}; do
    ns="$(readlink "/proc/${p}/ns/pid" 2> /dev/null)"

    # if pid of systemd is in our namespace, it is systemd
    [ -n "${myns}" ] && [ "${myns}" = "${ns}" ] && return 0
  done

  # else, it is not systemd
  return 1
}

get_systemd_service_dir() {
  if [ -w "/lib/systemd/system" ]; then
    echo "/lib/systemd/system"
  elif [ -w "/usr/lib/systemd/system" ]; then
    echo "/usr/lib/systemd/system"
  elif [ -w "/etc/systemd/system" ]; then
    echo "/etc/systemd/system"
  fi
}

install_non_systemd_init() {
  [ "${UID}" != 0 ] && return 1
  key="$(get_os_key)"

  if [ -d /etc/init.d ] && [ ! -f /etc/init.d/netdata ]; then
    if expr "${key}" : "^(gentoo|alpine).*"; then
      echo >&2 "Installing OpenRC init file..."
      run cp system/netdata-openrc /etc/init.d/netdata &&
        run chmod 755 /etc/init.d/netdata &&
        run rc-update add netdata default &&
        return 0

    elif expr "${key}" : "^devuan*" || [ "${key}" = "debian-7" ] || [ "${key}" = "ubuntu-12.04" ] || [ "${key}" = "ubuntu-14.04" ]; then
      echo >&2 "Installing LSB init file..."
      run cp system/netdata-lsb /etc/init.d/netdata &&
        run chmod 755 /etc/init.d/netdata &&
        run update-rc.d netdata defaults &&
        run update-rc.d netdata enable &&
        return 0
    elif expr "${key}" : "^(amzn-201[5678]|ol|CentOS release 6|Red Hat Enterprise Linux Server release 6|Scientific Linux CERN SLC release 6|CloudLinux Server release 6).*"; then
      echo >&2 "Installing init.d file..."
      run cp system/netdata-init-d /etc/init.d/netdata &&
        run chmod 755 /etc/init.d/netdata &&
        run chkconfig netdata on &&
        return 0
    else
      warning "Could not determine what type of init script to install on this system."
      return 1
    fi
  elif [ -f /etc/init.d/netdata ]; then
    echo >&2 "file '/etc/init.d/netdata' already exists."
    return 0
  else
    warning "Could not determine what type of init script to install on this system."
  fi

  return 1
}

run_install_service_script() {
  if [ -z "${tmpdir}" ]; then
    tmpdir="${TMPDIR:-/tmp}"
  fi

  # shellcheck disable=SC2154
  save_path="${tmpdir}/netdata-service-cmds"
  # shellcheck disable=SC2068
  "${NETDATA_PREFIX}/usr/libexec/netdata/install-service.sh" --save-cmds "${save_path}" ${@}

  case $? in
    0)
      if [ -r "${save_path}" ]; then
        # shellcheck disable=SC1090
        . "${save_path}"
      fi

      if [ -z "${NETDATA_INSTALLER_START_CMD}" ]; then
        if [ -n "${NETDATA_START_CMD}" ]; then
          NETDATA_INSTALLER_START_CMD="${NETDATA_START_CMD}"
        else
          NETDATA_INSTALLER_START_CMD="netdata"
        fi
      fi
      ;;
    1)
      if [ -z "${NETDATA_SERVICE_WARNED_1}" ]; then
        warning "Intenral error encountered while attempting to install or manage Netdata as a system service. This is probably a bug."
        NETDATA_SERVICE_WARNED_1=1
      fi
      ;;
    2)
      if [ -z "${NETDATA_SERVICE_WARNED_2}" ]; then
        warning "Failed to detect system service manager type. Cannot cleanly install or manage Netdata as a system service. If you are running this script in a container, this is expected and can safely be ignored."
        NETDATA_SERVICE_WARNED_2=1
      fi
      ;;
    3)
      if [ -z "${NETDATA_SERVICE_WARNED_3}" ]; then
        warning "Detected an unsupported system service manager. Manual setup will be required to manage Netdata as a system service."
        NETDATA_SERVICE_WARNED_3=1
      fi
      ;;
    4)
      if [ -z "${NETDATA_SERVICE_WARNED_4}" ]; then
        warning "Detected a supported system service manager, but failed to install Netdata as a system service. Usually this is a result of incorrect permissions. Manually running ${NETDATA_PREFIX}/usr/libexec/netdata/install-service.sh may provide more information about the exact issue."
        NETDATA_SERVICE_WARNED_4=1
      fi
      ;;
    5)
      if [ -z "${NETDATA_SERVICE_WARNED_5}" ]; then
        warning "We do not support managing Netdata as a system service on this platform. Manual setup will be required."
        NETDATA_SERVICE_WARNED_5=1
      fi
      ;;
  esac
}

install_netdata_service() {
  if [ "${UID}" -eq 0 ]; then
    if [ -x "${NETDATA_PREFIX}/usr/libexec/netdata/install-service.sh" ]; then
      run_install_service_script && return 0
    else
      # This is used by netdata-installer.sh
      # shellcheck disable=SC2034
      NETDATA_STOP_CMD="netdatacli shutdown-agent"

      NETDATA_START_CMD="netdata"
      NETDATA_INSTALLER_START_CMD=""

      uname="$(uname 2> /dev/null)"

      if [ "${uname}" = "Darwin" ]; then
        if [ -f "/Library/LaunchDaemons/com.github.netdata.plist" ]; then
          echo >&2 "file '/Library/LaunchDaemons/com.github.netdata.plist' already exists."
          return 0
        else
          echo >&2 "Installing MacOS X plist file..."
          # This is used by netdata-installer.sh
          # shellcheck disable=SC2034
          run cp system/netdata.plist /Library/LaunchDaemons/com.github.netdata.plist &&
            run launchctl load /Library/LaunchDaemons/com.github.netdata.plist &&
            NETDATA_START_CMD="launchctl start com.github.netdata" &&
            NETDATA_STOP_CMD="launchctl stop com.github.netdata"
          return 0
        fi

      elif [ "${uname}" = "FreeBSD" ]; then
        # This is used by netdata-installer.sh
        # shellcheck disable=SC2034
        run cp system/netdata-freebsd /etc/rc.d/netdata && NETDATA_START_CMD="service netdata start" &&
          NETDATA_STOP_CMD="service netdata stop" &&
          NETDATA_INSTALLER_START_CMD="service netdata onestart" &&
          myret=$?

        echo >&2 "Note: To explicitly enable netdata automatic start, set 'netdata_enable' to 'YES' in /etc/rc.conf"
        echo >&2 ""

        return ${myret}

      elif issystemd; then
        # systemd is running on this system
        NETDATA_START_CMD="systemctl start netdata"
        # This is used by netdata-installer.sh
        # shellcheck disable=SC2034
        NETDATA_STOP_CMD="systemctl stop netdata"
        NETDATA_INSTALLER_START_CMD="${NETDATA_START_CMD}"

        SYSTEMD_DIRECTORY="$(get_systemd_service_dir)"

        if [ "${SYSTEMD_DIRECTORY}x" != "x" ]; then
          ENABLE_NETDATA_IF_PREVIOUSLY_ENABLED="run systemctl enable netdata"
          IS_NETDATA_ENABLED="$(systemctl is-enabled netdata 2> /dev/null || echo "Netdata not there")"
          if [ "${IS_NETDATA_ENABLED}" = "disabled" ]; then
            echo >&2 "Netdata was there and disabled, make sure we don't re-enable it ourselves"
            ENABLE_NETDATA_IF_PREVIOUSLY_ENABLED="true"
          fi

          echo >&2 "Installing systemd service..."
          run cp system/netdata.service "${SYSTEMD_DIRECTORY}/netdata.service" &&
            run systemctl daemon-reload &&
            ${ENABLE_NETDATA_IF_PREVIOUSLY_ENABLED} &&
            return 0
        else
          warning "Could not find a systemd service directory, unable to install Netdata systemd service."
        fi
      else
        install_non_systemd_init
        ret=$?

        if [ ${ret} -eq 0 ]; then
          if [ -n "${service_cmd}" ]; then
            NETDATA_START_CMD="service netdata start"
            # This is used by netdata-installer.sh
            # shellcheck disable=SC2034
            NETDATA_STOP_CMD="service netdata stop"
          elif [ -n "${rcservice_cmd}" ]; then
            NETDATA_START_CMD="rc-service netdata start"
            # This is used by netdata-installer.sh
            # shellcheck disable=SC2034
            NETDATA_STOP_CMD="rc-service netdata stop"
          fi
          NETDATA_INSTALLER_START_CMD="${NETDATA_START_CMD}"
        fi

        return ${ret}
      fi
    fi
  fi

  return 1
}

# -----------------------------------------------------------------------------
# stop netdata

pidisnetdata() {
  if [ -d /proc/self ]; then
    if [ -z "$1" ] || [ ! -f "/proc/$1/stat" ]; then
      return 1
    fi
    [ "$(cut -d '(' -f 2 "/proc/$1/stat" | cut -d ')' -f 1)" = "netdata" ] && return 0
    return 1
  fi
  return 0
}

stop_netdata_on_pid() {
  pid="${1}"
  ret=0
  count=0

  pidisnetdata "${pid}" || return 0

  printf >&2 "Stopping netdata on pid %s ..." "${pid}"
  while [ -n "${pid}" ] && [ ${ret} -eq 0 ]; do
    if [ ${count} -gt 24 ]; then
      warning "Cannot stop netdata agent with PID ${pid}."
      return 1
    fi

    count=$((count + 1))

    pidisnetdata "${pid}" || ret=1
    if [ ${ret} -eq 1 ]; then
      break
    fi

    if [ ${count} -lt 12 ]; then
      run kill "${pid}" 2> /dev/null
      ret=$?
    else
      run kill -9 "${pid}" 2> /dev/null
      ret=$?
    fi

    test ${ret} -eq 0 && printf >&2 "." && sleep 5

  done

  echo >&2
  if [ ${ret} -eq 0 ]; then
    warning "Failed to stop netdata agent process with PID ${pid}."
    return 1
  fi

  echo >&2 "netdata on pid ${pid} stopped."
  return 0
}

netdata_pids() {
  myns="$(readlink /proc/self/ns/pid 2> /dev/null)"

  for p in \
    $(cat /var/run/netdata.pid 2> /dev/null) \
    $(cat /var/run/netdata/netdata.pid 2> /dev/null) \
    $(safe_pidof netdata 2> /dev/null); do
    ns="$(readlink "/proc/${p}/ns/pid" 2> /dev/null)"

    if [ -z "${myns}" ] || [ -z "${ns}" ] || [ "${myns}" = "${ns}" ]; then
      pidisnetdata "${p}" && echo "${p}"
    fi
  done
}

stop_all_netdata() {
  stop_success=0

  if [ -x "${NETDATA_PREFIX}/usr/libexec/netdata/install-service.sh" ]; then
    run_install_service_script --cmds-only
  fi

  if [ "${UID}" -eq 0 ]; then

    uname="$(uname 2>/dev/null)"

    # Any of these may fail, but we need to not bail if they do.
    if [ -n "${NETDATA_STOP_CMD}" ]; then
      if ${NETDATA_STOP_CMD}; then
        stop_success=1
        sleep 5
      fi
    elif issystemd; then
      if systemctl stop netdata; then
        stop_success=1
        sleep 5
      fi
    elif [ "${uname}" = "Darwin" ]; then
      if launchctl stop netdata; then
        stop_success=1
        sleep 5
      fi
    elif [ "${uname}" = "FreeBSD" ]; then
      if /etc/rc.d/netdata stop; then
        stop_success=1
        sleep 5
      fi
    else
      if service netdata stop; then
        stop_success=1
        sleep 5
      fi
    fi
  fi

  if [ "$stop_success" = "0" ]; then
    if [ -n "$(netdata_pids)" ] && [ -n "$(command -v netdatacli)" ]; then
      netdatacli shutdown-agent
      sleep 20
    fi

    for p in $(netdata_pids); do
      # shellcheck disable=SC2086
      stop_netdata_on_pid ${p}
    done
  fi
}

# -----------------------------------------------------------------------------
# restart netdata

restart_netdata() {
  netdata="${1}"
  shift

  started=0

  progress "Restarting netdata instance"

  if [ -x "${NETDATA_PREFIX}/usr/libexec/netdata/install-service.sh" ]; then
    run_install_service_script --cmds-only
  fi

  if [ -z "${NETDATA_INSTALLER_START_CMD}" ]; then
    if [ -n "${NETDATA_START_CMD}" ]; then
      NETDATA_INSTALLER_START_CMD="${NETDATA_START_CMD}"
    else
      NETDATA_INSTALLER_START_CMD="${netdata}"
    fi
  fi

  if [ "${UID}" -eq 0 ]; then
    echo >&2
    echo >&2 "Stopping all netdata threads"
    run stop_all_netdata

    echo >&2 "Starting netdata using command '${NETDATA_INSTALLER_START_CMD}'"
    # shellcheck disable=SC2086
    run ${NETDATA_INSTALLER_START_CMD} && started=1

    if [ ${started} -eq 1 ] && sleep 5 && [ -z "$(netdata_pids)" ]; then
      echo >&2 "Ooops! it seems netdata is not started."
      started=0
    fi

    if [ ${started} -eq 0 ]; then
      echo >&2 "Attempting another netdata start using command '${NETDATA_INSTALLER_START_CMD}'"
      # shellcheck disable=SC2086
      run ${NETDATA_INSTALLER_START_CMD} && started=1
    fi

    if [ ${started} -eq 1 ] && sleep 5 && [ -z "$(netdata_pids)" ]; then
      echo >&2 "Hm... it seems netdata is still not started."
      started=0
    fi
  fi


  if [ ${started} -eq 0 ]; then
    # still not started... another forced attempt, just run the binary
    warning "Netdata service still not started, attempting another forced restart by running '${netdata} ${*}'"
    run stop_all_netdata
    run "${netdata}" "${@}"
    return $?
  fi

  return 0
}

# -----------------------------------------------------------------------------
# install netdata logrotate

install_netdata_logrotate() {
  if [ "${UID}" -eq 0 ]; then
    if [ -d /etc/logrotate.d ]; then
      if [ ! -f /etc/logrotate.d/netdata ]; then
        run cp system/netdata.logrotate /etc/logrotate.d/netdata
      fi

      if [ -f /etc/logrotate.d/netdata ]; then
        run chmod 644 /etc/logrotate.d/netdata
      fi

      return 0
    fi
  fi

  return 1
}

# -----------------------------------------------------------------------------
# create netdata.conf

create_netdata_conf() {
  path="${1}"
  url="${2}"

  if [ -s "${path}" ]; then
    return 0
  fi

  if [ -n "$url" ]; then
    echo >&2 "Downloading default configuration from netdata..."
    sleep 5

    # remove a possibly obsolete configuration file
    [ -f "${path}.new" ] && rm "${path}.new"

    # disable a proxy to get data from the local netdata
    export http_proxy=
    export https_proxy=

    if command -v curl 1> /dev/null 2>&1; then
      run curl -sSL --connect-timeout 10 --retry 3 "${url}" > "${path}.new"
    elif command -v wget 1> /dev/null 2>&1; then
      run wget -T 15 -O - "${url}" > "${path}.new"
    fi

    if [ -s "${path}.new" ]; then
      run mv "${path}.new" "${path}"
      run_ok "New configuration saved for you to edit at ${path}"
    else
      [ -f "${path}.new" ] && rm "${path}.new"
      run_failed "Cannot download configuration from netdata daemon using url '${url}'"
      url=''
    fi
  fi

  if [ -z "$url" ]; then
    echo "# netdata can generate its own config which is available at 'http://<netdata_ip>/netdata.conf'" > "${path}"
    echo "# You can download it with command like: 'wget -O ${path} http://localhost:19999/netdata.conf'" >> "${path}"
  fi

}

portable_add_user() {
  username="${1}"
  homedir="${2}"

  [ -z "${homedir}" ] && homedir="/tmp"

  # Check if user exists
  if cut -d ':' -f 1 < /etc/passwd | grep "^${username}$" 1> /dev/null 2>&1; then
    echo >&2 "User '${username}' already exists."
    return 0
  fi

  echo >&2 "Adding ${username} user account with home ${homedir} ..."

  nologin="$(command -v nologin || echo '/bin/false')"

  # Linux
  if command -v useradd 1> /dev/null 2>&1; then
    run useradd -r -g "${username}" -c "${username}" -s "${nologin}" --no-create-home -d "${homedir}" "${username}" && return 0
  fi

  # FreeBSD
  if command -v pw 1> /dev/null 2>&1; then
    run pw useradd "${username}" -d "${homedir}" -g "${username}" -s "${nologin}" && return 0
  fi

  # BusyBox
  if command -v adduser 1> /dev/null 2>&1; then
    run adduser -h "${homedir}" -s "${nologin}" -D -G "${username}" "${username}" && return 0
  fi

  # mac OS
  if command -v sysadminctl 1> /dev/null 2>&1; then
    run sysadminctl -addUser "${username}" && return 0
  fi

  warning "Failed to add ${username} user account!"

  return 1
}

portable_add_group() {
  groupname="${1}"

  # Check if group exist
  if get_group "${groupname}" > /dev/null 2>&1; then
    echo >&2 "Group '${groupname}' already exists."
    return 0
  fi

  echo >&2 "Adding ${groupname} user group ..."

  # Linux
  if command -v groupadd 1> /dev/null 2>&1; then
    run groupadd -r "${groupname}" && return 0
  fi

  # FreeBSD
  if command -v pw 1> /dev/null 2>&1; then
    run pw groupadd "${groupname}" && return 0
  fi

  # BusyBox
  if command -v addgroup 1> /dev/null 2>&1; then
    run addgroup "${groupname}" && return 0
  fi

  # mac OS
  if command -v dseditgroup 1> /dev/null 2>&1; then
    dseditgroup -o create "${groupname}" && return 0
  fi

  warning >&2 "Failed to add ${groupname} user group !"
  return 1
}

portable_add_user_to_group() {
  groupname="${1}"
  username="${2}"

  # Check if group exist
  if ! get_group "${groupname}" > /dev/null 2>&1; then
    echo >&2 "Group '${groupname}' does not exist."
    # Don’t treat this as a failure, if the group does not exist we should not be trying to add the user to it.
    return 0
  fi

  # Check if user is in group
  if get_group "${groupname}" | cut -d ':' -f 4 | grep -wq "${username}"; then
    # username is already there
    echo >&2 "User '${username}' is already in group '${groupname}'."
    return 0
  else
    # username is not in group
    echo >&2 "Adding ${username} user to the ${groupname} group ..."

    # Linux
    if command -v usermod 1> /dev/null 2>&1; then
      run usermod -a -G "${groupname}" "${username}" && return 0
    fi

    # FreeBSD
    if command -v pw 1> /dev/null 2>&1; then
      run pw groupmod "${groupname}" -m "${username}" && return 0
    fi

    # BusyBox
    if command -v addgroup 1> /dev/null 2>&1; then
      run addgroup "${username}" "${groupname}" && return 0
    fi

    # mac OS
    if command -v dseditgroup 1> /dev/null 2>&1; then
      dseditgroup -u "${username}" "${groupname}" && return 0
    fi

    warning >&2 "Failed to add user ${username} to group ${groupname}!"
    return 1
  fi
}

safe_sha256sum() {
  # Within the context of the installer, we only use -c option that is common between the two commands
  # We will have to reconsider if we start non-common options
  if command -v sha256sum > /dev/null 2>&1; then
    sha256sum "$@"
  elif command -v shasum > /dev/null 2>&1; then
    shasum -a 256 "$@"
  else
    fatal "I could not find a suitable checksum binary to use" "L0001"
  fi
}

_get_scheduler_type() {
  if _get_intervaldir > /dev/null ; then
    echo 'interval'
  elif issystemd ; then
    echo 'systemd'
  elif [ -d /etc/cron.d ] ; then
    echo 'crontab'
  else
    echo 'none'
  fi
}

_get_intervaldir() {
  if [ -d /etc/cron.daily ]; then
    echo /etc/cron.daily
  elif [ -d /etc/periodic/daily ]; then
    echo /etc/periodic/daily
  else
    return 1
  fi

  return 0
}

install_netdata_updater() {
  if [ "${INSTALLER_DIR}" ] && [ -f "${INSTALLER_DIR}/packaging/installer/netdata-updater.sh" ]; then
    cat "${INSTALLER_DIR}/packaging/installer/netdata-updater.sh" > "${NETDATA_PREFIX}/usr/libexec/netdata/netdata-updater.sh" || return 1
  fi

  if [ "${NETDATA_SOURCE_DIR}" ] && [ -f "${NETDATA_SOURCE_DIR}/packaging/installer/netdata-updater.sh" ]; then
    cat "${NETDATA_SOURCE_DIR}/packaging/installer/netdata-updater.sh" > "${NETDATA_PREFIX}/usr/libexec/netdata/netdata-updater.sh" || return 1
  fi

  if issystemd && [ -n "$(get_systemd_service_dir)" ]; then
    cat "${NETDATA_SOURCE_DIR}/system/netdata-updater.timer" > "$(get_systemd_service_dir)/netdata-updater.timer"
    cat "${NETDATA_SOURCE_DIR}/system/netdata-updater.service" > "$(get_systemd_service_dir)/netdata-updater.service"
  fi

  sed -i -e "s|THIS_SHOULD_BE_REPLACED_BY_INSTALLER_SCRIPT|${NETDATA_USER_CONFIG_DIR}/.environment|" "${NETDATA_PREFIX}/usr/libexec/netdata/netdata-updater.sh" || return 1

  chmod 0755 "${NETDATA_PREFIX}/usr/libexec/netdata/netdata-updater.sh"
  echo >&2 "Update script is located at ${TPUT_GREEN}${TPUT_BOLD}${NETDATA_PREFIX}/usr/libexec/netdata/netdata-updater.sh${TPUT_RESET}"
  echo >&2

  return 0
}

set_netdata_updater_channel() {
  sed -i -e "s/^RELEASE_CHANNEL=.*/RELEASE_CHANNEL=\"${RELEASE_CHANNEL}\"/" "${NETDATA_USER_CONFIG_DIR}/.environment"
}