From a170bf80ec156678abad2ddaf20e1533490d1e4b Mon Sep 17 00:00:00 2001 From: Robert Dailey Date: Sat, 22 Dec 2018 11:14:55 -0600 Subject: [PATCH] Improve data directory write checking for NFS mounts If `is_writable()` fails, fall back to logic that attempts to create a file and then checks if it exists. If this check fails, an error occurs as it did before. Discussion on this solution was found here: https://help.nextcloud.com/t/write-errors-for-nfs-mount/23328 Fixes #7124 Signed-off-by: Robert Dailey --- lib/private/legacy/util.php | 22 +++++++++++++++------- 1 file changed, 15 insertions(+), 7 deletions(-) diff --git a/lib/private/legacy/util.php b/lib/private/legacy/util.php index a94ced8bb1..7ab1371654 100644 --- a/lib/private/legacy/util.php +++ b/lib/private/legacy/util.php @@ -43,6 +43,7 @@ * @author Victor Dubiniuk * @author Vincent Petry * @author Volkan Gezer + * @author Robert Dailey * * @license AGPL-3.0 * @@ -789,13 +790,20 @@ class OC_Util { ]; } } else if (!is_writable($CONFIG_DATADIRECTORY) or !is_readable($CONFIG_DATADIRECTORY)) { - //common hint for all file permissions error messages - $permissionsHint = $l->t('Permissions can usually be fixed by giving the webserver write access to the root directory. See %s.', - [$urlGenerator->linkToDocs('admin-dir_permissions')]); - $errors[] = [ - 'error' => 'Your data directory is not writable', - 'hint' => $permissionsHint - ]; + // is_writable doesn't work for NFS mounts, so try to write a file and check if it exists. + $testFile = sprintf('%s/%s.tmp', $CONFIG_DATADIRECTORY, uniqid('data_dir_writability_test_')); + $handle = fopen($testFile, 'w'); + if (!$handle || fwrite($handle, 'Test write operation') === FALSE) { + $permissionsHint = $l->t('Permissions can usually be fixed by giving the webserver write access to the root directory. See %s.', + [$urlGenerator->linkToDocs('admin-dir_permissions')]); + $errors[] = [ + 'error' => 'Your data directory is not writable', + 'hint' => $permissionsHint + ]; + } else { + fclose($handle); + unlink($testFile); + } } else { $errors = array_merge($errors, self::checkDataDirectoryPermissions($CONFIG_DATADIRECTORY)); }