test/units/TEST-17-UDEV.diskseq.sh

   1 #!/usr/bin/env bash
   2 # SPDX-License-Identifier: LGPL-2.1-or-later
   3 # shellcheck disable=SC2010
   4 # shellcheck disable=SC2012
   5 # shellcheck disable=SC2317
   6 set -ex
   7 set -o pipefail
   8
   9 # shellcheck source=test/units/util.sh
  10 . "$(dirname "$0")"/util.sh
  11
  12 # This is a test case for issue #34637.
  13
  14 at_exit() (
  15     set +e
  16
  17     systemctl stop test-diskseq.service || :
  18     rm -f /run/systemd/system/test-diskseq.service
  19     systemctl daemon-reload
  20
  21     [[ -d "$TMPDIR" ]] && rm -rf "$TMPDIR"
  22
  23     udevadm control --log-level=info
  24 )
  25
  26 trap at_exit EXIT
  27
  28 udevadm control --log-level=debug
  29
  30 TMPDIR="$(mktemp -d)"
  31 truncate -s 16M "$TMPDIR"/foo.raw
  32 mkfs.ext4 -L foo "$TMPDIR"/foo.raw
  33
  34 mkdir -p /run/systemd/system/
  35 cat >/run/systemd/system/test-diskseq.service <<EOF
  36 [Unit]
  37 StartLimitIntervalSec=0
  38 [Service]
  39 ExecStart=false
  40 Restart=on-failure
  41 MountImages=$TMPDIR/foo.raw:/var
  42 EOF
  43 systemctl daemon-reload
  44
  45 udevadm settle
  46
  47 # Check if no lock file exists, if the lock directory exists.
  48 if [[ -d /run/udev/links.lock/ ]]; then
  49     [[ "$(ls /run/udev/links.lock/ | wc -l)" == 0 ]]
  50 fi
  51
  52 # Save the current number of the directories.
  53 NUM_DISKSEQ=$(ls /run/udev/links/ | grep -c by-diskseq || :)
  54
  55 systemctl start --no-block test-diskseq.service
  56
  57 for _ in {0..100}; do
  58     sleep .1
  59     n=$(ls /run/udev/links/ | grep -c by-diskseq || :)
  60     (( n <= NUM_DISKSEQ + 1 ))
  61 done
  62
  63 systemctl stop test-diskseq.service || :
  64
  65 udevadm settle
  66
  67 # Check if the lock directory exists, but no lock file exists in it.
  68 [[ -d /run/udev/links.lock/ ]]
  69 [[ "$(ls /run/udev/links.lock/ | wc -l)" == 0 ]]
  70
  71 exit 0