1 files changed, 66 insertions, 0 deletions
diff --git a/lib/private/Log/Systemdlog.php b/lib/private/Log/Systemdlog.php
new file mode 100644
index 00000000000..ffea0511732
--- /dev/null
+++ b/lib/private/Log/Systemdlog.php
@@ -0,0 +1,66 @@
+<?php
+
+/**
+ * SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+namespace OC\Log;
+
+use OC\SystemConfig;
+use OCP\HintException;
+use OCP\ILogger;
+use OCP\Log\IWriter;
+
+// The following fields are understood by systemd/journald, see
+// man systemd.journal-fields. All are optional:
+// MESSAGE=
+//     The human-readable message string for this entry.
+// MESSAGE_ID=
+//     A 128-bit message identifier ID
+// PRIORITY=
+//     A priority value between 0 ("emerg") and 7 ("debug")
+// CODE_FILE=, CODE_LINE=, CODE_FUNC=
+//     The code location generating this message, if known
+// ERRNO=
+//     The low-level Unix error number causing this entry, if any.
+// SYSLOG_FACILITY=, SYSLOG_IDENTIFIER=, SYSLOG_PID=
+//     Syslog compatibility fields
+
+class Systemdlog extends LogDetails implements IWriter {
+	protected array $levels = [
+		ILogger::DEBUG => 7,
+		ILogger::INFO => 6,
+		ILogger::WARN => 4,
+		ILogger::ERROR => 3,
+		ILogger::FATAL => 2,
+	];
+
+	protected string $syslogId;
+
+	public function __construct(
+		SystemConfig $config,
+		?string $tag = null,
+	) {
+		parent::__construct($config);
+		if (!function_exists('sd_journal_send')) {
+			throw new HintException(
+				'PHP extension php-systemd is not available.',
+				'Please install and enable PHP extension systemd if you wish to log to the Systemd journal.');
+		}
+		if ($tag === null) {
+			$tag = $config->getValue('syslog_tag', 'Nextcloud');
+		}
+		$this->syslogId = $tag;
+	}
+
+	/**
+	 * Write a message to the log.
+	 * @param string|array $message
+	 */
+	public function write(string $app, $message, int $level): void {
+		$journal_level = $this->levels[$level];
+		sd_journal_send('PRIORITY=' . $journal_level,
+			'SYSLOG_IDENTIFIER=' . $this->syslogId,
+			'MESSAGE=' . $this->logDetailsAsJSON($app, $message, $level));
+	}
+}