Read-only documents should not attempt to save

[albert-a]

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

I have the text file in the read-only directory on the external storage.
In the Nextcloud UI in the browser I can't rename the file, but I can edit it..
And the changes are saved.

Steps to reproduce

1. Add the external storage with a read-only directory and a text file in the directory.
2. Click on the file in the browser in the Nextcloud UI, change something and close editor.
3. Open the file again. The changes should be there.

Expected behavior

I expect the UI editor not to allow changing read only files.

Installation method

Official All-in-One appliance

Nextcloud Server version

29

Operating system

Debian/Ubuntu

PHP engine version

None

Web server

None

Database engine version

None

Is this bug present after an update or on a fresh install?

None

Are you using the Nextcloud Server Encryption module?

Encryption is Disabled

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

{
    "system": {
        "one-click-instance": true,
        "one-click-instance.user-limit": 100,
        "memcache.local": "\\OC\\Memcache\\APCu",
        "apps_paths": [
            {
                "path": "\/var\/www\/html\/apps",
                "url": "\/apps",
                "writable": false
            },
            {
                "path": "\/var\/www\/html\/custom_apps",
                "url": "\/custom_apps",
                "writable": true
            }
        ],
        "appsallowlist": false,
        "check_data_directory_permissions": false,
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "password": "***REMOVED SENSITIVE VALUE***",
            "port": 6379
        },
        "overwritehost": "cloud.example.com",
        "overwriteprotocol": "https",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "localhost",
            "cloud.example.com"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "pgsql",
        "version": "29.0.2.2",
        "overwrite.cli.url": "https:\/\/cloud.example.com\/",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "maintenance": false,
        "updatedirectory": "\/nc-updater",
        "loglevel": "4",
        "app_install_overwrite": [
            "nextcloud-aio"
        ],
        "log_type": "file",
        "logfile": "\/var\/www\/html\/data\/nextcloud.log",
        "log_rotate_size": "10485760",
        "log.condition": {
            "apps": [
                "admin_audit"
            ]
        },
        "preview_max_x": "2048",
        "preview_max_y": "2048",
        "jpeg_quality": "60",
        "enabledPreviewProviders": {
            "1": "OC\\Preview\\Image",
            "2": "OC\\Preview\\MarkDown",
            "3": "OC\\Preview\\MP3",
            "4": "OC\\Preview\\TXT",
            "5": "OC\\Preview\\OpenDocument",
            "6": "OC\\Preview\\Movie",
            "7": "OC\\Preview\\Krita",
            "0": "OC\\Preview\\Imaginary"
        },
        "enable_previews": true,
        "upgrade.disable-web": true,
        "mail_smtpmode": "smtp",
        "trashbin_retention_obligation": "auto, 30",
        "versions_retention_obligation": "auto, 30",
        "activity_expire_days": "30",
        "simpleSignUpLink.shown": false,
        "share_folder": "\/Shared",
        "ldapProviderFactory": "OCA\\User_LDAP\\LDAPProviderFactory",
        "one-click-instance.link": "https:\/\/nextcloud.com\/all-in-one\/",
        "upgrade.cli-upgrade-link": "https:\/\/github.com\/nextcloud\/all-in-one\/discussions\/2726",
        "maintenance_window_start": 100,
        "allow_local_remote_servers": true,
        "davstorage.request_timeout": 10800,
        "htaccess.RewriteBase": "\/",
        "dbpersistent": false,
        "auth.bruteforce.protection.enabled": true,
        "ratelimit.protection.enabled": true,
        "files_external_allow_create_new_local": true,
        "trusted_proxies": "***REMOVED SENSITIVE VALUE***",
        "preview_imaginary_url": "***REMOVED SENSITIVE VALUE***",
        "preview_imaginary_key": "***REMOVED SENSITIVE VALUE***",
        "skeletondirectory": "\/mnt\/home\/.skel\/nextcloud",
        "default_phone_region": "EN"
    }
}

List of activated Apps

Enabled:
  - activity: 2.21.1
  - admin_audit: 1.19.0
  - circles: 29.0.0-dev
  - cloud_federation_api: 1.12.0
  - comments: 1.19.0
  - contactsinteraction: 1.10.0
  - dashboard: 7.9.0
  - dav: 1.30.1
  - federatedfilesharing: 1.19.0
  - federation: 1.19.0
  - files: 2.1.0
  - files_downloadlimit: 2.0.0
  - files_external: 1.21.0
  - files_pdfviewer: 2.10.0
  - files_reminders: 1.2.0
  - files_sharing: 1.21.0
  - files_trashbin: 1.19.0
  - firstrunwizard: 2.18.0
  - logreader: 2.14.0
  - lookup_server_connector: 1.17.0
  - nextcloud-aio: 0.6.0
  - nextcloud_announcements: 1.18.0
  - notifications: 2.17.0
  - notify_push: 0.6.12
  - oauth2: 1.17.0
  - password_policy: 1.19.0
  - photos: 2.5.0
  - privacy: 1.13.0
  - provisioning_api: 1.19.0
  - recommendations: 2.1.0
  - related_resources: 1.4.0
  - richdocuments: 8.4.3
  - serverinfo: 1.19.0
  - settings: 1.12.0
  - sharebymail: 1.19.0
  - spreed: 19.0.3
  - support: 1.12.0
  - systemtags: 1.19.0
  - text: 3.10.0
  - theming: 2.4.0
  - twofactor_backupcodes: 1.18.0
  - user_ldap: 1.20.0
  - viewer: 2.3.0
  - weather_status: 1.9.0
  - workflowengine: 2.11.0
Disabled:
  - bruteforcesettings: 2.9.0
  - encryption: 2.17.0
  - files_versions: 1.22.0 (installed 1.22.0)
  - survey_client: 1.17.0 (installed 1.17.0)
  - suspicious_login: 7.0.0
  - twofactor_totp: 11.0.0-dev
  - user_status: 1.9.0 (installed 1.9.0)

Nextcloud Signing status

No errors have been found.

Nextcloud Logs

no log entries added during editing/opening the file

Additional info

The Versions app is disabled.
I don't observe the changes neither in /mnt/ncdata/ nor in external storage. I guess the changes are saved somewhere in the database.

[joshtrichards]

The Versions app is disabled.
I don't observe the changes neither in /mnt/ncdata/ nor in external storage. I guess the changes are saved somewhere in the database

The only place I know of where we may store a changes like this is in the Text editor app session. So I'm moving this over there since this seems likely to be limited to the editor.

[juliusknorr]

I could reproduce this but only if the read only permission was set on the underlying file system, with setting read only in the external storage config it works as expected.

I'm currently unsure what the expected behaviour is for the external storage app and if it actually is designed to respect different file permissions there.

Might be a server bug as the files app also shows file create options even if the folder is read only