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89 lines
3.3 KiB
Bash
Executable File
89 lines
3.3 KiB
Bash
Executable File
#!/usr/bin/env bash
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# SPDX-License-Identifier: LGPL-2.1-or-later
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set -eux
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set -o pipefail
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add_logs_filtering_override() {
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local unit="${1:?}"
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local override_name="${2:?}"
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local log_filter="${3:-}"
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mkdir -p "/run/systemd/system/$unit.d/"
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echo -ne "[Service]\nLogFilterPatterns=$log_filter" >"/run/systemd/system/$unit.d/$override_name.conf"
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systemctl daemon-reload
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}
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run_service_and_fetch_logs() {
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local unit="${1:?}"
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local start end
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start="$(date '+%Y-%m-%d %T.%6N')"
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systemctl restart "$unit"
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sleep .5
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journalctl --sync
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end="$(date '+%Y-%m-%d %T.%6N')"
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journalctl -q -u "$unit" -S "$start" -U "$end" -p notice
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systemctl stop "$unit"
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}
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is_xattr_supported() {
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local start end
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start="$(date '+%Y-%m-%d %T.%6N')"
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systemd-run --unit text_xattr --property LogFilterPatterns=log sh -c "sleep .5"
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sleep .5
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journalctl --sync
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end="$(date '+%Y-%m-%d %T.%6N')"
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systemctl stop text_xattr
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! journalctl -q -u "text_xattr" -S "$start" -U "$end" --grep "Failed to set 'user.journald_log_filter_patterns' xattr.*not supported$"
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}
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if is_xattr_supported; then
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# Accept all log messages
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add_logs_filtering_override "logs-filtering.service" "00-reset" ""
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[[ -n $(run_service_and_fetch_logs "logs-filtering.service") ]]
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add_logs_filtering_override "logs-filtering.service" "01-allow-all" ".*"
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[[ -n $(run_service_and_fetch_logs "logs-filtering.service") ]]
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# Discard all log messages
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add_logs_filtering_override "logs-filtering.service" "02-discard-all" "~.*"
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[[ -z $(run_service_and_fetch_logs "logs-filtering.service") ]]
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# Accept all test messages
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add_logs_filtering_override "logs-filtering.service" "03-reset" ""
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[[ -n $(run_service_and_fetch_logs "logs-filtering.service") ]]
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# Discard all test messages
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add_logs_filtering_override "logs-filtering.service" "04-discard-gg" "~.*gg.*"
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[[ -z $(run_service_and_fetch_logs "logs-filtering.service") ]]
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# Deny filter takes precedence
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add_logs_filtering_override "logs-filtering.service" "05-allow-all-but-too-late" ".*"
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[[ -z $(run_service_and_fetch_logs "logs-filtering.service") ]]
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# Use tilde in a deny pattern
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add_logs_filtering_override "logs-filtering.service" "06-reset" ""
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add_logs_filtering_override "logs-filtering.service" "07-prevent-tilde" "~~more~"
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[[ -z $(run_service_and_fetch_logs "logs-filtering.service") ]]
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# Only allow a pattern that won't be matched
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add_logs_filtering_override "logs-filtering.service" "08-reset" ""
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add_logs_filtering_override "logs-filtering.service" "09-allow-only-non-existing" "non-existing string"
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[[ -z $(run_service_and_fetch_logs "logs-filtering.service") ]]
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# Allow a pattern starting with a tilde
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add_logs_filtering_override "logs-filtering.service" "10-allow-with-escape-char" "\\\\x7emore~"
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[[ -n $(run_service_and_fetch_logs "logs-filtering.service") ]]
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add_logs_filtering_override "delegated-cgroup-filtering.service" "00-allow-all" ".*"
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[[ -n $(run_service_and_fetch_logs "delegated-cgroup-filtering.service") ]]
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add_logs_filtering_override "delegated-cgroup-filtering.service" "01-discard-hello" "~hello"
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[[ -z $(run_service_and_fetch_logs "delegated-cgroup-filtering.service") ]]
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rm -rf /run/systemd/system/{logs-filtering,delegated-cgroup-filtering}.service.d
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fi
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