mirror of
https://github.com/morgan9e/systemd
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9422ce83c2
Loopback block devices are agressively reused, without being removed in between. This means various inode attributes on their device nodes will – so far – remain in effect between uses of the devices. Since there are applications which change access mode/ownership of such devices after attaching files to them, let's undo this again when we detect them to be unused again. Fixes: #37745
51 lines
944 B
Bash
Executable File
51 lines
944 B
Bash
Executable File
#!/usr/bin/env bash
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# SPDX-License-Identifier: LGPL-2.1-or-later
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# shellcheck disable=SC2317
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set -ex
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set -o pipefail
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# shellcheck source=test/units/util.sh
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. "$(dirname "$0")"/util.sh
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at_exit() (
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set +e
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[[ -d "$TMPDIR" ]] && rm -rf "$TMPDIR"
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udevadm control --log-level=info
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)
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trap at_exit EXIT
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udevadm control --log-level=debug
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TMPDIR="$(mktemp -d)"
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truncate -s 16M "$TMPDIR"/foo.raw
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mkfs.ext4 "$TMPDIR"/foo.raw
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D="$(systemd-dissect --attach --loop-ref=schlumpf "$TMPDIR"/foo.raw)"
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udevadm wait --timeout=30 --settle /dev/disk/by-loop-ref/schlumpf
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SAVED_GROUP="$(stat -c "%g" "$D")"
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SAVED_MODE="$(stat -c "%a" "$D")"
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chmod 705 "$D"
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chown root:65534 "$D"
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test "$(stat -c "%g %a" "$D")" = "65534 705"
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losetup -d "$D"
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for _ in {0..4}; do
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udevadm settle --timeout=5
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if [[ "$(stat -c "%g" "$D")" = "$SAVED_GROUP" && "$(stat -c "%a" "$D")" = "$SAVED_MODE" ]] ; then
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exit 0
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fi
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sleep 1
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done
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exit 1
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