fix(files): Make sure file pointer existsbackport/51333/stable30

Signed-off-by: Git'Fellow <12234510+solracsf@users.noreply.github.com>

1 files changed, 8 insertions, 8 deletions

diff --git a/lib/private/Files/Type/Detection.php b/lib/private/Files/Type/Detection.php
index 3676a9b736c..48907b3473f 100644
--- a/lib/private/Files/Type/Detection.php
+++ b/lib/private/Files/Type/Detection.php
@@ -228,18 +228,18 @@ class Detection implements IMimeTypeDetector {
 			// lets see if it does have mime support
 			$path = escapeshellarg($path);
 			$fp = popen("test -f $path && file -b --mime-type $path", 'r');
-			$mimeType = fgets($fp);
-			pclose($fp);
-
-			if ($mimeType !== false) {
-				//trim the newline
-				$mimeType = trim($mimeType);
-				$mimeType = $this->getSecureMimeType($mimeType);
-				if ($mimeType !== 'application/octet-stream') {
+			if ($fp !== false) {
+				$mimeType = fgets($fp);
+				pclose($fp);
+				if ($mimeType !== false) {
+					//trim the newline
+					$mimeType = trim($mimeType);
+					$mimeType = $this->getSecureMimeType($mimeType);
 					return $mimeType;
 				}
 			}
 		}
+
 		return 'application/octet-stream';
 	}