1 files changed, 71 insertions, 0 deletions
diff --git a/lib/private/BinaryFinder.php b/lib/private/BinaryFinder.php
new file mode 100644
index 00000000000..a7ef55237db
--- /dev/null
+++ b/lib/private/BinaryFinder.php
@@ -0,0 +1,71 @@
+<?php
+
+declare(strict_types = 1);
+/**
+ * @copyright 2022 Carl Schwan <carl@carlschwan.eu>
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OC;
+
+use OCP\ICache;
+use OCP\ICacheFactory;
+use OCP\IBinaryFinder;
+use Symfony\Component\Process\ExecutableFinder;
+
+/**
+ * Service that find the binary path for a program
+ */
+class BinaryFinder implements IBinaryFinder {
+	private ICache $cache;
+
+	public function __construct(ICacheFactory $cacheFactory) {
+		$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, [
+				'/usr/local/sbin',
+				'/usr/local/bin',
+				'/usr/sbin',
+				'/usr/bin',
+				'/sbin',
+				'/bin',
+				'/opt/bin',
+			]);
+			if ($result === null) {
+				$result = false;
+			}
+		}
+		// store the value for 5 minutes
+		$this->cache->set($program, $result, 300);
+		return $result;
+	}
+}