1 files changed, 65 insertions, 0 deletions
diff --git a/lib/private/BinaryFinder.php b/lib/private/BinaryFinder.php
new file mode 100644
index 00000000000..74e72d1564a
--- /dev/null
+++ b/lib/private/BinaryFinder.php
@@ -0,0 +1,65 @@
+<?php
+
+declare(strict_types = 1);
+/**
+ * SPDX-FileCopyrightText: 2022 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+namespace OC;
+
+use OCP\IBinaryFinder;
+use OCP\ICache;
+use OCP\ICacheFactory;
+use OCP\IConfig;
+use Symfony\Component\Process\ExecutableFinder;
+
+/**
+ * Service that find the binary path for a program
+ */
+class BinaryFinder implements IBinaryFinder {
+	public const DEFAULT_BINARY_SEARCH_PATHS = [
+		'/usr/local/sbin',
+		'/usr/local/bin',
+		'/usr/sbin',
+		'/usr/bin',
+		'/sbin',
+		'/bin',
+		'/opt/bin',
+	];
+	private ICache $cache;
+
+	public function __construct(
+		ICacheFactory $cacheFactory,
+		private IConfig $config,
+	) {
+		$this->cache = $cacheFactory->createLocal('findBinaryPath');
+	}
+
+	/**
+	 * Try to find a program
+	 *
+	 * @return false|string
+	 */
+	public function findBinaryPath(string $program) {
+		$result = $this->cache->get($program);
+		if ($result !== null) {
+			return $result;
+		}
+		$result = false;
+		if (\OCP\Util::isFunctionEnabled('exec')) {
+			$exeSniffer = new ExecutableFinder();
+			// Returns null if nothing is found
+			$result = $exeSniffer->find(
+				$program,
+				null,
+				$this->config->getSystemValue('binary_search_paths', self::DEFAULT_BINARY_SEARCH_PATHS));
+			if ($result === null) {
+				$result = false;
+			}
+		}
+		// store the value for 5 minutes
+		$this->cache->set($program, $result, 300);
+		return $result;
+	}
+}